EP0451615B1 - Discharge device for at least one medium - Google Patents

Discharge device for at least one medium Download PDF

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Publication number
EP0451615B1
EP0451615B1 EP91104833A EP91104833A EP0451615B1 EP 0451615 B1 EP0451615 B1 EP 0451615B1 EP 91104833 A EP91104833 A EP 91104833A EP 91104833 A EP91104833 A EP 91104833A EP 0451615 B1 EP0451615 B1 EP 0451615B1
Authority
EP
European Patent Office
Prior art keywords
valve
opening
discharge
inflow
control valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91104833A
Other languages
German (de)
French (fr)
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EP0451615A3 (en
EP0451615A2 (en
Inventor
Karl-Heinz Fuchs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aptar Radolfzell GmbH
Original Assignee
Erich Pfeiffer GmbH
Ing Erich Pfeiffer GmbH
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Publication date
Application filed by Erich Pfeiffer GmbH, Ing Erich Pfeiffer GmbH filed Critical Erich Pfeiffer GmbH
Publication of EP0451615A2 publication Critical patent/EP0451615A2/en
Publication of EP0451615A3 publication Critical patent/EP0451615A3/en
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Publication of EP0451615B1 publication Critical patent/EP0451615B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1001—Piston pumps
    • B05B11/1016—Piston pumps the outlet valve having a valve seat located downstream a movable valve element controlled by a pressure actuated controlling element
    • B05B11/1018—Piston pumps the outlet valve having a valve seat located downstream a movable valve element controlled by a pressure actuated controlling element and the controlling element cooperating with means for opening or closing the inlet valve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1087—Combination of liquid and air pumps

Definitions

  • the invention relates to a discharge device according to the preamble of claim 1. It is e.g. provided for one or more flowable media, which can be liquid, gaseous, powdery or powdery, pasty or similar.
  • a media stream via an inflow mouth in particular with the interposition of an inflow control valve, is to be fed to a further media stream upstream and / or downstream of a discharge opening leading to the outside, it being possible for two or more media streams to be the same medium or different media.
  • This configuration enables an intensive application of one medium to the other in the vicinity or in the area of the discharge opening under favorable pressure conditions.
  • the media of the media streams can be provided for mixing or other processing.
  • At least one, in particular gaseous, media stream can also be provided as the delivery or carrier stream for at least one further medium.
  • An inflow control valve is proportionate Far away from the merging of the associated media flows, large pressure losses can occur in particular up to the merging if this control valve, for example as a pressure relief valve, opens in a pressure-controlled manner and the last valve is up to the discharge opening.
  • DE-A-3 722 469 shows a discharge device in which the valve opening of a control valve is relatively far away from the inflow mouth of the duct connected to the inflow duct.
  • the invention has for its object to provide a discharge device of the type mentioned, by means of which disadvantages of known solutions are avoided and with which, in particular, pressure losses of at least one medium can be avoided in a simple manner before two or more media are brought together.
  • the respective medium can be pressurized immediately before entering the area of merging by a lock, such as a control valve, so that when the lock is opened there is only a minimal path to the area of Must merge.
  • This small path which is determined, for example, by the small thickness of a wall penetrated by the inflow opening and is often smaller than the width of this opening, means that the associated medium can impact the other medium practically without loss of pressure.
  • the pressure of the supplied medium essentially corresponds exactly to the adjusted opening pressure of the control valve, because after its valve seat there are no appreciably pressure-effective flow paths that can cause the medium to decelerate or accelerate.
  • the area where the media are brought together can be at a greater distance from or directly adjacent to the outlet opening, for example in the area of the rear end of a nozzle cap be provided so that the media from the merging essentially only have to flow in a straight line to the outlet opening or to a swirl device for the atomization of the corresponding medium.
  • the inflow mouth or the valve opening forming it can be located on the circumference of at least one chamber or channel. If two adjacent channels touch or cross one another, for example tangentially, in such a way that their inner surfaces form a breakthrough at one point, the inner circumference thereof can be delimited by a very narrow, knife-like edge, the flanks of which are formed directly by the inner surfaces mentioned.
  • the width of the opening is advantageously smaller than the width of one or both channels or larger than the discharge opening, and the opening forms the connection or inflow opening.
  • the inflow orifice for at least one medium surrounds a channel or a chamber for at least one further medium in a ring at least partially, so that the inflowing medium is distributed in individual streams or as a ring Total flow flows radially inwards.
  • the inflow opening can be delimited by two opposing end faces, which can expediently be closed under a control force in such a way that they form the closing surfaces of the control valve.
  • the inflow mouth can also be provided at a short distance from the closing surfaces of the control valve.
  • openings which are formed by the valve seat and the inflow opening can be provided axially one behind the other on an inner peripheral surface and / or radially adjacent or coaxially in the region of an end face.
  • the inflow in the area of the outlet opening e.g. to be provided in such a way that at least two media are fed to one another only in the area in which they emerge directly into the open.
  • the one media stream can be fed to a coaxial core stream as a converging and therefore accelerated envelope stream.
  • the core stream is injected directly in front of the discharge opening, which conducts the sheath flow, through a slightly recessed, but exiting outlet opening, so that strong swirling and atomization can take place at this outlet opening and the sheath flow tears the core flow out of the outlet opening.
  • the width of the annular channel for the sheath flow e.g. as a function of the occurring flow pressures of at least one media stream, are continuously and continuously changed.
  • means are expediently provided in order at the end of the pressure delivery of a medium with liquid, pasty and / or powder-like properties to be able to pass a cleaning stream through at least a part of the outlet channel or the discharge opening, which is expediently gaseous or is formed by air.
  • a corresponding valve in particular the control valve, is inevitably kept in an at least partially open state, as a result of which the compressible delivery or cleaning medium, which is biased in a chamber, can still flow.
  • the design according to the invention is particularly suitable for discharge devices which have at least two e.g. has coaxially combined and simultaneously operated pumps, such as thrust piston pumps, which have separate pressure or pumping chambers.
  • One pump can be designed as an air pump closer to the discharge opening, while the other pump may deliver from an associated media store.
  • This part of the discharge device can e.g. be designed according to that according to DE-A-37 22 469, to which reference is made for further features and effects.
  • the discharge device 1 has a base unit 2 to be fastened with a cap 4 to the neck of a media container and a discharge head 3 which is detachably attached to the latter, the end face of which serves as a pressure handle for essentially simultaneously actuating two approximately coaxial pumps 5, 6.
  • the liquid pump 5 protruding into the media container can e.g. be designed in accordance with DE-A-37 15 303 or how the air pump 6 corresponds to DE-A-39 11 510, to which reference is made for further details and effects.
  • the pumps 5, 6 have separate pump chambers 7, 8, which are line-connected to a common discharge opening 9, which is only indicated in FIG. 2.
  • the pump 6 lies in the direction of the common central axis 10 between the pump 5 and the discharge opening 9; its pump chamber 8 is substantially larger than the pump chamber 7 at approximately the same maximum stroke in the chamber volume or in the clear width.
  • the pump 6 lies completely within the cap-shaped discharge head 3; the pump 5 protrudes only in part of its length into the discharge head 3 and connects axially directly to the pump 6.
  • a piston shaft 11 for the pump piston of the pump 5 passes through the pump chamber 8 and serves as the only attachment for the discharge head 3.
  • the piston shaft 11 is penetrated inside by an associated section of an outlet channel 12.
  • a parallel flow channel 13 leads from the associated end face of the pump chamber 8 also in the direction of the discharge opening 9.
  • the only one by the thickness channel 13 lying at a lateral distance from the piston skirt 11 can, like the channel 12, be formed by a plurality of individual channels arranged in a ring.
  • the outlet of the pump chamber 7 is assigned a pressure-dependent and / or mechanically forcibly opening outlet valve 14 towards the end of the pump stroke, which is expediently located in the region of the transition of the piston skirt 11 in the associated pump piston or within the associated cylinder housing.
  • a pressure-dependent and / or towards the end of the pump stroke, a control valve 15 that is forced to open is assigned to the channel 13 and is located approximately in the same longitudinal region of the central axis 10 as the discharge opening 9, the opening axis of which intersects the central axis 10 at right angles. All of the specified configurations, arrangements, sizes and layers can be provided only approximately, only partially, or completely, instead of as described; in addition, the respective training and arrangement can be provided individually or multiple times and can be combined with any other.
  • the longitudinal section of the outlet channel 12 merges into a transverse channel which is coaxial with the outlet opening 9 and which forms a chamber 16 with an annular cross section for receiving a nozzle cap, as will be described by way of example with reference to FIG. 4.
  • the control valve 15 forms a valve chamber 17, which is located directly adjacent to the outer circumference and / or inner end of this chamber 16 and is likewise delimited by the outer housing 26 of the discharge head 3, for receiving a valve body 18.
  • the chamber 17 is located at the height of the discharge opening 9 , perpendicular to the central axis of the chamber 16, parallel to the central axis 10, slightly behind an axial plane determined by an inner bottom of the chamber 16, between the associated end of the pump chamber 8 and the handle and / or between the chamber 16 and the outer periphery of the discharge head 3.
  • the bores forming the chambers 16, 17 have approximately the same inner width and are so directly adjacent to one another that a breakthrough as an inflow between their central axes Mouth 20 is formed, which extends only over a part of the inner circumference of the chamber 17 and the inner circumference of the chamber 16 and can also extend in part in the bottom thereof.
  • the mouth 20 is at the level of the discharge opening 9, its central axis is perpendicular to the central axis 10 and the central axes of the discharge opening 9 and the control valve 15 and at least in its closed position between two sealing lips of the valve body 18 on its outer circumference.
  • the piston-like valve body 18 which is displaceable in the piston 17 between a closed and an open position, has an annular valve lip 21 as the closing member and an axially projecting sealing lip 22 for sealing against a spring chamber. Between the two sealing lips, the outer circumference of the valve body 18 forms an annular space with the inner circumference of the chamber 17, to which the mouth 20 adjoins.
  • a valve seat 19 is provided on the end of the chamber 17 facing the pump chamber 8 and penetrated by the channel 13, which valve seat can be formed by an inner circumference and / or the associated end or bottom surface of the chamber 17 on which the valve lip 21 is in the initial position under pretension.
  • a conically widened section of the chamber 17 adjoins the circumferential surface of the valve seat 19, which section merges into an enlarged cylindrical section and how the mouth 20 can pass through it.
  • the further sealing lip 22 slides in any position, while the valve lip 21 separates from the valve seat 19 after a first axial path and lies in the area of the enlarged or conical section without contact.
  • the channel 13 is line-connected to the mouth 20.
  • the valve body 18 is formed in one piece with a valve stem 23 which is guided in a bore of the housing 26 lying adjacent to the piston stem 11 and thereby forms the channel 13 in that it is provided with longitudinal grooves on the outer circumference. In the initial position, the valve stem 23 protrudes slightly into the pump chamber 8.
  • a prestressed valve spring 24 is supported on the valve body 18, which engages in the sealing lip 22 and is secured with a closure 25.
  • the valve body 18, the valve spring 24 and the closure 25 are inserted from the outside of the housing 26, namely from the handle, into a common bore forming the chamber 17.
  • the end 25 is pressed into this bore in the form of a stopper with an annular bead and forms with an inner mandrel both a guide for the valve spring 24 and an end stop for the maximum open position of the valve body 18.
  • the pump 6 has a pot-shaped pump piston 27 which is rigidly attached to the outer end of the pump housing of the pump 5 and is guided in a cylinder 28 of the housing 26 which extends in a cap-shaped manner beyond the cap 4.
  • the pump chamber 8 is delimited by an inner cover 29 which has an outer circumference Annular space for the entry of the piston skirt leaves free and which is fastened to the bottom of the cylinder 28 or to the housing 26 by being blown in so that the housing space, which has a plug-in socket for the piston skirt 11, the outlet chamber 16, the control valve 15 or the like picks up, closes tightly with respect to the pump chamber 8.
  • the end wall of the inner cover 29 is penetrated by the piston skirt 23. In the pump stroke end position, the inner cover 29 fills the interior of the pump piston 27 almost completely, so that the remaining volume of the pump chamber 8 is very small or the air can be compressed strongly.
  • the pump piston 27 is structurally combined with an inlet valve 30 which is almost completely sunk inside the piston head 31, the valve body 32 of which is designed as a resilient flexible plate and the valve seat 36 is formed by an annular bead.
  • the valve body 32 is formed in one piece with a valve sleeve 34 projecting over its two end faces, which is penetrated by the piston skirt 11 and is fixed in a piston sleeve 33 by insertion, which protrudes from the outer end face of the piston head 31 and projects into the cylinder housing of the pump 5. forms a cylinder cover for this and / or serves as an end stop for the starting position of the pump piston of the pump 5.
  • valve sleeve 34 slides with at least one sealing lip 35 on the outer circumference of the piston skirt 11.
  • valve seat 36 which is located in the region of the outer circumference of the valve body 32 on its end face and protrudes beyond the bottom surface of a recess for receiving the valve body 32, are provided adjacent to the outer circumference of the piston sleeve 33 a plurality of inlet channels 37 distributed over the circumference, which the piston crown 38th push through.
  • the valve body 32 is lifted self-resiliently from its linear contact with the valve seat 36, so that air is drawn in from the outside via the inlet channels 37 between the associated end of the cylinder housing of the pump 5 and the piston head 31.
  • a slide valve or inlet valve 40 of the pump 5 is initially not yet closed, so that a pressure is only built up in the pump chamber 8 and the control valve 15 is loaded in the sense of the opening.
  • the control valve 15 opens at least partially, so that the air through the mouth 20 and the discharge opening 9 begins to flow to the outside.
  • a pressure builds up in the pump chamber 7, which leads to the opening of the outlet valve 14, so that liquid is supplied to the already flowing compressed air in the region of the chamber 16 and is thereby exposed to additional conveying energy and possibly atomization becomes.
  • a driver 38 strikes an actuating element of the control valve 15, which is formed, for example, by the end face 39 of the shaft 23, in such a way that it is inevitably opened or kept open regardless of the pressure.
  • the outlet valve 14 of the pump 5 is inevitably kept open by the stop of the associated pump piston on the cylinder bottom, the pump chamber 7 becoming depressurized very quickly at the end of the pumping stroke, while the pump chamber 8 still contains prestressed air.
  • the inlet valve 30 is inevitably kept closed regardless of the pressure conditions.
  • the driver 38 is formed by the associated end face of the valve body 32, on which the piston shaft 23 in the pump stroke end position with its end face 39 is only present in a limited circumferential area, but advantageously so that the closing force that occurs is applied to the whole Valve body 32 affects.
  • the forced opening of the control valve 15 can only lead to a partial opening, so that in this case the valve body 18 does not have to rest against the associated stop. The procedure described results in a very advantageous function.
  • the control valve 15 closes under the force of the valve spring 24 before any residual liquid from the chamber 16 could be sucked into the chamber 17, since the Closing path of the valve body 18 is very small.
  • the housing 26 forms a nozzle core 41 which lies in the center of the chamber 16 and projects freely in the discharge direction and which, with the inner circumference of the chamber 16 or a corresponding channel section, delimits an annular space for receiving the jacket of a nozzle cap 42, which is similar to that according to FIG. 4 can be formed.
  • a nozzle channel 45 which is initially conically tapered in the flow direction and then cylindrical, the outer end of which is an outlet opening 46 or, if arranged on the discharge device according to FIGS. 1 to 3 forms the discharge opening 9.
  • two or three longitudinal channels 47 are provided which are uniformly distributed over the circumference and which merge into transverse channels 48 which lie on the inside of the end wall 44.
  • the longitudinal channels 47 or the transverse channels 48 can be directly connected to one another by a ring channel 49.
  • the radially inwardly tapered transverse channels 48 open approximately tangentially into the circumference of the inner, further end of the nozzle channel 45 so that there is a flow swirl device for the liquid to be discharged.
  • the inflow mouth 20 connects to the rear end of the nozzle cap, the longitudinal channels or an annular channel which connects these rear ends to one another. The compressed air thus enters from the mouth 20 into an annular chamber into which the outlet channel 12 also opens and from which the media enter directly into the channels of the nozzle cap.
  • the design according to FIGS. 4 and 5 can replace the described nozzle arrangement according to FIGS. 1 to 3 and / or the control valve 15 according to design and / or location, or it can be additionally provided.
  • This design also forms a control valve 50, which has separate control functions or influences on both media flows or, after their combination, on the total flow.
  • the control valve 50 is axially aligned with the discharge opening 9a on the outer circumference of the discharge head 3a and completely within it.
  • the inflow mouth is not immediately adjacent and at approximately the right angle to the valve opening, but is formed by the valve opening. Their width changes continuously with the air pressure.
  • An annular channel for the enveloping flow directly adjoining the valve seat is formed by two conical boundary surfaces lying one inside the other, which can be moved axially relative to one another such that the width of this annular channel can be changed.
  • the outer boundary surface, which forms the discharge opening 9a extends further in the starting direction in the direction of flow than the inner boundary surface and can be moved as a whole in front of this inner boundary surface, so that the annular channel then merges into a conical full channel.
  • the outlet opening 46 is provided, which is set back with respect to the discharge opening 9a and is set forward with respect to the valve seat 19a.
  • a truncated cone-shaped neck protrudes beyond the flat outside of the end wall 44 of the nozzle cap 42 and forms the inner boundary surface 51.
  • This is surrounded by an enlarged, but in the same way frustoconical opening in the end wall 54 of the cap-shaped valve body 18a, which forms the outer boundary surface 52.
  • This forms an inner flank of a control edge 21a which protrudes in a ring shape at the rear and has an acute-angled cutting edge for the closing contact with the valve seat 19a.
  • the boundary surface 52 merges into the center of a flat-shell-shaped depression on the outside of the end wall 54.
  • the end wall 54 of the cap-shaped valve body 18a which receives the nozzle cap 42 almost over its entire length, is formed in one piece with a jacket 55 closely surrounding the nozzle cap 42 and a piston 56, which is provided at the rear jacket end and in a cylinder 57 of the housing of the discharge head 3a against the Force of the valve spring 24a is displaceable.
  • a plurality of longitudinal grooves distributed over the circumference are provided, which are delimited by the outer circumference of the nozzle cap 42 as longitudinal channels 58 and on the inside of the end wall 54 merge into ring segment-shaped transverse channels 59, which are separated from one another only by narrow or intermediate webs 60 which also have a small gap distance from the end face or the valve seat 19a in the closed position.
  • the pressure chamber of the cylinder 57 located at the rear end of the jacket 55 or the piston 56 is connected to the pump chamber 8 via the outlet channel, if necessary, without the interposition of a further valve.
  • the longitudinal channels 47 or their common, rear connection channel are connected to the outlet channel of the pump 5, if necessary in a valve-controlled manner.
  • the groove-shaped transverse channels 59 or the intermediate webs 60 are lifted off the valve seat 19a in such a way that a disk-shaped overall channel is formed which is essentially continuous and continuous, and the air radially inwards from all sides into the opening of the end wall 54 flows.
  • the liquid delivery stops suddenly, while the valve body 18a moves back under the force of the return spring, so that air is still supplied for cleaning from the cylinder chamber of the piston 56.
  • the valve spring 24a which is supported on the piston 56 and surrounds the jacket 55, rests with its front end on an annular end 25a which surrounds the valve body 18a and is blown into the housing of the discharge head 3a.
  • the valve body 18a can be guided at this end 25a and, like this or the nozzle cap 42, is inserted from the outer circumference of the housing into a bore which forms the cylinder 57 and into which the nozzle core 41a projects.
  • the design according to the invention enables very fine atomization to be achieved with simple manufacture and assembly.
  • the spraying or atomizing behavior can be influenced in many ways only by using different nozzles.
  • the pressure losses, in particular of the compressed air, are extremely low, since the only outlet valve of the air pump is very close to or directly at the discharge opening and only a short, approximately rectilinear channel has to be provided between the outlet opening of this valve and the discharge opening.
  • At least one medium can also be conveyed by storing it under pressure in a container, so that the actuation stroke only serves to open an outlet valve.

Abstract

A discharge device with a liquid pump (5) and an air pump (6) has a control valve (15) for the latter lying very close to the discharge opening, the mouth (20) of which opens directly into a terminal duct (16) forming the discharge opening, so that pressure losses are largely avoided. For cleaning, at least in the area of the discharge opening, a control is provided by means of which air continues to be delivered on termination of the liquid delivery. In this way a very fine atomisation is possible with a simple design. <IMAGE>

Description

Die Erfindung betrifft eine Austragvorrichtung nach dem Oberbegriff des Patentanspruches 1. Sie ist z.B. für ein oder mehrere fließfähige Medien vorgesehen, die flüssig, gasförmig, pulver- bzw. puderartig, pastös oder ähnlich sein können. Gemäß der Erfindung soll ein Medienstrom über eine Zustrom-Mündung, insbesondere unter Zwischenschaltung eines Zustrom-Steuerventiles, einem weiteren Medienstrom vor und/oder nach einer ins Freie führenden Austragöffnung zugeführt werden, wobei zwei oder mehr Medienströme das gleiche Medium oder unterschiedliche Medien sein können. Durch diese Ausbildung kann eine intensive Beaufschlagung eines Mediums mit dem anderen in Nähe bzw. im Bereich der Austragöffnung unter günstigen Druckverhältnissen erzielt werden.The invention relates to a discharge device according to the preamble of claim 1. It is e.g. provided for one or more flowable media, which can be liquid, gaseous, powdery or powdery, pasty or similar. According to the invention, a media stream via an inflow mouth, in particular with the interposition of an inflow control valve, is to be fed to a further media stream upstream and / or downstream of a discharge opening leading to the outside, it being possible for two or more media streams to be the same medium or different media. This configuration enables an intensive application of one medium to the other in the vicinity or in the area of the discharge opening under favorable pressure conditions.

Die Medien der Medienströme können zur Durchmischung oder anderweitiger Aufbereitung vorgesehen sein. Auch kann mindestens ein, insbesondere gasförmiger Medienstrom als Förder- bzw. Trägerstrom für mindestens ein weiteres Medium vorgesehen sein. Liegt ein Zustrom-Steuerventil verhältnismäßig weit entfernt von der Zusammenführung der zugehörigen Medienströme, so können sich insbesondere dann bis zur Zusammenführung große Druckverluste ergeben, wenn dieses Steuerventil, z.B. als Überdruckventil, druckabhängig gesteuert öffnet und das letzte Ventil bis zur Austragöffnung ist.The media of the media streams can be provided for mixing or other processing. At least one, in particular gaseous, media stream can also be provided as the delivery or carrier stream for at least one further medium. An inflow control valve is proportionate Far away from the merging of the associated media flows, large pressure losses can occur in particular up to the merging if this control valve, for example as a pressure relief valve, opens in a pressure-controlled manner and the last valve is up to the discharge opening.

Die DE-A-3 722 469 zeigt eine Austragvorrichtung, bei welcher die Ventilöffnung eines Steuerventiles verhältnismäßig weit entfernt liegt von der Zustrom-Mündung des mit dem Zustrom-Kanal verbundenen Kanales.
Die nicht vorveröffentlichte EP-A-0 392 238 zeigt im Hinblick hierauf eine ähnliche Ausbildung, wobei in beiden Fällen die Zustrom-Mündung im Winkel zur Ventilöffnung liegt.DE-A-3 722 469 shows a discharge device in which the valve opening of a control valve is relatively far away from the inflow mouth of the duct connected to the inflow duct.
In this regard, EP-A-0 392 238, which has not been previously published, shows a similar design, in both cases the inflow opening being at an angle to the valve opening.

Der Erfindung liegt die Aufgabe zugrunde, eine Austragvorrichtung der genannten Art zu schaffen, durch welche Nachteile bekannter Lösungen vermieden sind und mit welcher insbesondere Druckverluste wenigstens eines Mediums vor der Zusammenführung zweier oder mehrerer Medien auf einfache Weise vermieden werden können.The invention has for its object to provide a discharge device of the type mentioned, by means of which disadvantages of known solutions are avoided and with which, in particular, pressure losses of at least one medium can be avoided in a simple manner before two or more media are brought together.

Zur Lösung sind Mittel vorgesehen, durch welche das jeweilige Medium unmittelbar vor Eintritt in den Bereich der Zusammenführung durch eine Sperre, wie ein Steuerventil, so unter Druck gesetzt werden kann, daß es bei Öffnen der Sperre nur noch einen minimalen Weg bis in den Bereich der Zusammenführung zurücklegen muß. Durch diesen geringen Weg, der z.B. durch die geringe Dicke einer von der Zustrom-Mündung durchsetzten Wand bestimmt und vielfach kleiner als die Weite dieser Mündung ist, kann das zugehörige Medium praktisch ohne Druckverlust auf das andere Medium prallen. Der Druck des zugeführten Mediums entspricht insofern im wesentlichen genau dem justierten Öffnungsdruck des Steuerventiles, weil nämlich nach dessen Ventilsitz keine nennenswert druckwirksamen Strömungsstrecken vorgesehen sind, die eine Verzögerung oder Beschleunigung des Mediums hervorrufen können.To solve the problem, means are provided by means of which the respective medium can be pressurized immediately before entering the area of merging by a lock, such as a control valve, so that when the lock is opened there is only a minimal path to the area of Must merge. This small path, which is determined, for example, by the small thickness of a wall penetrated by the inflow opening and is often smaller than the width of this opening, means that the associated medium can impact the other medium practically without loss of pressure. In this respect, the pressure of the supplied medium essentially corresponds exactly to the adjusted opening pressure of the control valve, because after its valve seat there are no appreciably pressure-effective flow paths that can cause the medium to decelerate or accelerate.

Der Bereich der Zusammenführung der Medien kann in größerem Abstand von der Auslaßöffnung oder unmittelbar benachbart zu dieser z.B. im Bereich des hinteren Endes einer Düsenkappe vorgesehen sein, so daß die Medien ab der Zusammenführung im wesentlichen nur noch geradlinig bis zur Auslaßöffnung bzw. bis zu einer Dralleinrichtung für die Zerstäubung des entsprechenden Mediums zu fließen haben. Ferner kann die Zustrom-Mündung bzw. die diese bildende Ventilöffnung am Umfang mindestens einer Kammer bzw. eines Kanales liegen. Berühren oder kreuzen zwei benachbarte Kanäle einander z.B. tangential so, daß ihre Innenflächen an einer Stelle einen Durchbruch bilden, so kann dessen Innenumfang von einer sehr schmalen, schneidenartigen Kante begrenzt sein, deren Flanken unmittelbar von den genannten Innenflächen gebildet sind. Die Weite des Durchbruches ist zweckmäßig kleiner als die Weite eines oder beider Kanäle bzw. größer als die Austragöffnung, und der Durchbruch bildet die Verbindungs- bzw. Zuströmöffnung.The area where the media are brought together can be at a greater distance from or directly adjacent to the outlet opening, for example in the area of the rear end of a nozzle cap be provided so that the media from the merging essentially only have to flow in a straight line to the outlet opening or to a swirl device for the atomization of the corresponding medium. Furthermore, the inflow mouth or the valve opening forming it can be located on the circumference of at least one chamber or channel. If two adjacent channels touch or cross one another, for example tangentially, in such a way that their inner surfaces form a breakthrough at one point, the inner circumference thereof can be delimited by a very narrow, knife-like edge, the flanks of which are formed directly by the inner surfaces mentioned. The width of the opening is advantageously smaller than the width of one or both channels or larger than the discharge opening, and the opening forms the connection or inflow opening.

Bei der beschriebenen oder einer anderen Ausbildung kann es auch vorteilhaft sein, wenn die Zustrom-Mündung für mindestens ein Medium einen Kanal oder eine Kammer für mindestens ein weiteres Medium in einem Kranz wenigstens teilringförmig umgibt, so daß das zuströmende Medium in Einzelströmen verteilt oder als ringförmiger Gesamtstrom radial nach innen gerichtet zuströmt. In diesem Fall kann die Zustrom-Mündung durch zwei einander gegenüberliegende Stirnflächen begrenzt sein, die zweckmäßig unter einer Steuerkraft so schließbar sind, daß sie die Schließflächen des Steuerventiles bilden. Die Zustrom-Mündung kann aber auch in geringem Abstand von den Schließflächen des Steuerventiles vorgesehen sein. Zum Beispiel können Öffnungen, die durch den Ventilsitz und die Zustrom-Mündung gebildet sind, axial hintereinander an einer Innenumfangsfläche und/oder radial benachbart bzw. koaxial im Bereich einer Stirnfläche vorgesehen sein.In the described or another embodiment, it can also be advantageous if the inflow orifice for at least one medium surrounds a channel or a chamber for at least one further medium in a ring at least partially, so that the inflowing medium is distributed in individual streams or as a ring Total flow flows radially inwards. In this case, the inflow opening can be delimited by two opposing end faces, which can expediently be closed under a control force in such a way that they form the closing surfaces of the control valve. The inflow mouth can also be provided at a short distance from the closing surfaces of the control valve. For example, openings which are formed by the valve seat and the inflow opening can be provided axially one behind the other on an inner peripheral surface and / or radially adjacent or coaxially in the region of an end face.

Bei der beschriebenen oder einer anderen Ausbildung ist es des weiteren vorteilhaft möglich, den Zustrom im Bereich der Auslaßöffnung z.B. derart vorzusehen, daß mindestens zwei Medien einander erst in dem Bereich zugeführt werden, in dem sie unmittelbar ins Freie austreten. Zum Beispiel kann der eine Medienstrom als konvergierender und daher beschleunigter Hüllstrom einem koaxialen Kernstrom zugeführt werden. Der Kernstrom wird unmittelbar vor der Austragöffnung, die den Hüllstrom leitet, in diesen durch eine geringfügig zurückversetzte, jedoch in's Freie austretende Auslaßöffnung injiziert, so daß an dieser Auslaßöffnung eine starke Verwirbelung und Zerstäubung stattfinden kann und der Hüllstrom den Kernstrom aus der Auslaßöffnung herausreißt. Sind zwei ringförmig ineinanderliegende, insbesondere in Strömungsrichtung verjüngte Leitflächen für den Hüllstrom etwa axial gegeneinander verstellbar, so kann die Weite des ringförmigen Kanales für den Hüllstrom, z.B. als Funktion der auftretenden Strömungsdrücke mindestens eines Medienstromes, laufend und stufenlos verändert werden.In the described or another embodiment, it is also advantageously possible to adjust the inflow in the area of the outlet opening, e.g. to be provided in such a way that at least two media are fed to one another only in the area in which they emerge directly into the open. For example, the one media stream can be fed to a coaxial core stream as a converging and therefore accelerated envelope stream. The core stream is injected directly in front of the discharge opening, which conducts the sheath flow, through a slightly recessed, but exiting outlet opening, so that strong swirling and atomization can take place at this outlet opening and the sheath flow tears the core flow out of the outlet opening. If two ring-shaped guide surfaces for the sheath flow, which are tapered in particular in the direction of flow, can be adjusted approximately axially relative to one another, the width of the annular channel for the sheath flow, e.g. as a function of the occurring flow pressures of at least one media stream, are continuously and continuously changed.

Bei der beschriebenen oder einer anderen Ausbildung sind zweckmäßig Mittel vorgesehen, um am Ende der Druckförderung eines Mediums mit flüssigen, pastösen und/oder pulverartigen Eigenschaften durch mindestens einen Teil des Auslaßkanales bzw. der Austragöffnung noch einen Reinigungsstrom leiten zu können, der zweckmäßig gasförmig bzw. durch Luft gebildet ist. Hierzu wird vorteilhaft am Ende eines Betätigungshubes für die Austragvorrichtung ein entsprechendes Ventil, insbesondere das Steuerventil, zwangsläufig in einem wenigstens teilweise geöffneten Zustand gehalten, wodurch das kompressible Förder- bzw. Reinigungsmedium, das sich vorgespannt in einer Kammer befindet, noch nachströmen kann.In the described or another embodiment, means are expediently provided in order at the end of the pressure delivery of a medium with liquid, pasty and / or powder-like properties to be able to pass a cleaning stream through at least a part of the outlet channel or the discharge opening, which is expediently gaseous or is formed by air. For this purpose, at the end of an actuation stroke for the discharge device, a corresponding valve, in particular the control valve, is inevitably kept in an at least partially open state, as a result of which the compressible delivery or cleaning medium, which is biased in a chamber, can still flow.

Die erfindungsgemäße Ausbildung eignet sich insbesondere für Austragvorrichtungen, die mindestens zwei z.B. koaxial zusammengefaßte und gleichzeitig zu betätigende Pumpen, wie Schubkolbenpumpen, aufweist, die gesonderte Druck- bzw. Pumpkammern haben. Eine Pumpe kann dabei als näher bei der Austragöffnung liegende Luftpumpe ausgebildet sein, während die andere Pumpe ggf. aus einem zugehörigen Medienspeicher fördert. Dieser Teil der Austragvorrichtung kann z.B. entsprechend derjenigen nach der DE-A-37 22 469 ausgebildet sein, auf die wegen weiterer Merkmale und Wirkungen Bezug genommen wird.The design according to the invention is particularly suitable for discharge devices which have at least two e.g. has coaxially combined and simultaneously operated pumps, such as thrust piston pumps, which have separate pressure or pumping chambers. One pump can be designed as an air pump closer to the discharge opening, while the other pump may deliver from an associated media store. This part of the discharge device can e.g. be designed according to that according to DE-A-37 22 469, to which reference is made for further features and effects.

Diese und weitere Merkmale von bevorzugten Weiterbildungen der Erfindung gehen außer aus den Ansprüchen auch aus der Beschreibung und den Zeichnungen hervor, wobei die einzelnen Merkmale jeweils für sich allein oder zu mehreren in Form von Unterkombinationen bei einer Ausführungsform der Erfindung und auf anderen Gebieten verwirklicht sein und vorteilhafte sowie für sich schutzfähige Ausführungen darstellen können. Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden im folgenden näher erläutert. In den Zeichnungen zeigen:

Fig. 1
eine erfindungsgemäße Austragvorrichtung im Axialschnitt,
Fig. 2
den Austragkopf gemäß Fig. 1 im Querschnitt,
Fig. 3
einen Ausschnitt der Fig. 1 in vergrößerter Darstellung, jedoch am Ende des Pumphubes,
Fig. 4
eine weitere Ausführungsform des Austragkopfes im Axialschnitt und
Fig. 5
den Austragkopf gemäß Fig. 4 im Querschnitt.
These and further features of preferred developments of the invention are evident from the claims and also from the description and the drawings, the individual features being implemented individually or in groups in the form of sub-combinations in one embodiment of the invention and in other areas, and can represent advantageous and protectable versions. Embodiments of the invention are shown in the drawings and are explained in more detail below. The drawings show:
Fig. 1
a discharge device according to the invention in axial section,
Fig. 2
1 in cross section,
Fig. 3
2 shows a detail of FIG. 1 in an enlarged view, but at the end of the pump stroke,
Fig. 4
a further embodiment of the discharge head in axial section and
Fig. 5
4 in cross section.

Die Austragvorrichtung 1 weist eine mit einer Kappe 4 am Hals eines Medienbehälters zu befestigende Basiseinheit 2 und einen lösbar an dieser durch Aufstecken befestigten Austragkopf 3 auf, dessen Stirnfläche als Druck-Handhabe zur im wesentlichen gleichzeitigen Betätigung zweier annähernd koaxialer Pumpen 5, 6 dient. Die in den Medienbehälter hineinragende Flüssigkeits-Pumpe 5 kann z.B. entsprechend der DE-A-37 15 303 oder wie die Luft-Pumpe 6 entsprechend der DE-A-39 11 510 ausgebildet sein, auf die wegen weiterer Einzelheiten und Wirkungen Bezug genommen wird. Die Pumpen 5, 6 haben gesonderte Pumpenkammern 7, 8, die mit einer gemeinsamen, in Fig. 2 nur angedeuteten Austragöffnung 9 leitungsverbunden sind. Die Pumpe 6 liegt in Richtung der gemeinsamen Mittelachse 10 zwischen der Pumpe 5 und der Austragöffnung 9; ihre Pumpenkammer 8 ist bei etwa gleichem Maximalhub im Kammervolumen bzw. in der lichten Weite wesentlich größer als die Pumpenkammer 7. Die Pumpe 6 liegt vollständig innerhalb des kappenförmigen Austragkopfes 3; die Pumpe 5 ragt nur mit einem Teil ihrer Länge in den Austragkopf 3 und schließt axial unmittelbar an die Pumpe 6 an.The discharge device 1 has a base unit 2 to be fastened with a cap 4 to the neck of a media container and a discharge head 3 which is detachably attached to the latter, the end face of which serves as a pressure handle for essentially simultaneously actuating two approximately coaxial pumps 5, 6. The liquid pump 5 protruding into the media container can e.g. be designed in accordance with DE-A-37 15 303 or how the air pump 6 corresponds to DE-A-39 11 510, to which reference is made for further details and effects. The pumps 5, 6 have separate pump chambers 7, 8, which are line-connected to a common discharge opening 9, which is only indicated in FIG. 2. The pump 6 lies in the direction of the common central axis 10 between the pump 5 and the discharge opening 9; its pump chamber 8 is substantially larger than the pump chamber 7 at approximately the same maximum stroke in the chamber volume or in the clear width. The pump 6 lies completely within the cap-shaped discharge head 3; the pump 5 protrudes only in part of its length into the discharge head 3 and connects axially directly to the pump 6.

Ein Kolbenschaft 11 für den Pumpkolben der Pumpe 5 durchsetzt die Pumpenkammer 8 und dient als einzige Befestigung für den Austragkopf 3. Der Kolbenschaft 11 ist im Innern von einem zugehörigen Abschnitt eines Auslaßkanales 12 durchsetzt. Ein dazu paralleler Zustrom-Kanal 13 führt von der zugehörigen Stirnseite der Pumpenkammer 8 ebenfalls in Richtung zur Austragöffnung 9. Der nur um die Dicke einer einzigen Zwischenwand in seitlichem Abstand vom Kolbenschaft 11 liegende Kanal 13 kann wie der Kanal 12 durch mehrere in einem Kranz angeordnete Einzelkanäle gebildet sein.A piston shaft 11 for the pump piston of the pump 5 passes through the pump chamber 8 and serves as the only attachment for the discharge head 3. The piston shaft 11 is penetrated inside by an associated section of an outlet channel 12. A parallel flow channel 13 leads from the associated end face of the pump chamber 8 also in the direction of the discharge opening 9. The only one by the thickness channel 13 lying at a lateral distance from the piston skirt 11 can, like the channel 12, be formed by a plurality of individual channels arranged in a ring.

Dem Ausgang der Pumpenkammer 7 ist ein druckabhängig und/oder gegen Ende des Pumphubes mechanisch zwangsweise öffnendes Auslaßventil 14 zugeordnet, das zweckmäßig im Bereich des Überganges des Kolbenschaftes 11 in dem zugehörigen Pumpkolben bzw. innerhalb des zugehörigen Zylindergehäuses liegt. Dem Kanal 13 ist ein druckabhängig und/oder gegen Ende des Pumphubes zwangsweise öffnendes Steuerventil 15 zugeordnet, das sich etwa im selben Längsbereich der Mittelachse 10 wie die Austragöffnung 9 befindet, deren Öffnungsachse die Mittelachse 10 rechtwinklig schneidet. Alle angegebenen Ausbildungen, Anordnungen, Größen und Lagen können statt wie beschrieben auch nur annähernd, nur im wesentlichen, nur teilweise bzw. vollständig vorgesehen sein; außerdem kann die jeweilige Ausbildung und Anordnung ausschließlich einzeln oder mehrfach vorgesehen und mit jeder anderen sinngemäß kombiniert sein. Der Längsabschnitt des Auslaßkanales 12 geht in einen zur Auslaßöffnung 9 koaxialen Querkanal über, der eine im Querschnitt ringförmige Kammer 16 zur Aufnahme einer Düsenkappe bildet, wie sie noch anhand Fig. 4 beispielhaft beschrieben wird.The outlet of the pump chamber 7 is assigned a pressure-dependent and / or mechanically forcibly opening outlet valve 14 towards the end of the pump stroke, which is expediently located in the region of the transition of the piston skirt 11 in the associated pump piston or within the associated cylinder housing. A pressure-dependent and / or towards the end of the pump stroke, a control valve 15 that is forced to open is assigned to the channel 13 and is located approximately in the same longitudinal region of the central axis 10 as the discharge opening 9, the opening axis of which intersects the central axis 10 at right angles. All of the specified configurations, arrangements, sizes and layers can be provided only approximately, only partially, or completely, instead of as described; in addition, the respective training and arrangement can be provided individually or multiple times and can be combined with any other. The longitudinal section of the outlet channel 12 merges into a transverse channel which is coaxial with the outlet opening 9 and which forms a chamber 16 with an annular cross section for receiving a nozzle cap, as will be described by way of example with reference to FIG. 4.

Das Steuerventil 15 bildet eine unmittelbar benachbart zum Außenumfang und/oder inneren Ende dieser Kammer 16 liegende, ebenfalls durch das Außen-Gehäuse 26 des Austragkopfes 3 begrenzte Ventil-Kammer 17 für die Aufnahme eines Ventilkörpers 18. Die Kammer 17 liegt in Höhe der Austragöffnung 9, rechtwinklig zur Mittelachse der Kammer 16, parallel zur Mittelachse 10, geringfügig hinter einer durch einen inneren Boden der Kammer 16 bestimmten Axialebene, zwischen dem zugehörigen Ende der Pumpenkammer 8 und der Handhabe und/oder zwischen der Kammer 16 und dem Außenumfang des Austragkopfes 3. Die die Kammern 16, 17 bildenden Bohrungen haben etwa gleiche Innenweite und grenzen so unmittelbar aneinander an, daß zwischen ihren Mittelachsen ein Durchbruch als Zustrom-Mündung 20 gebildet ist, die sich nur über einen Teil des Innenumfanges der Kammer 17 und des Innenumfanges der Kammer 16 erstreckt und mit einem Teil auch in deren Boden reichen kann. Die Mündung 20 liegt in Höhe der Austragöffnung 9, ihre Mittelachse liegt rechtwinklig zur Mittelachse 10 sowie den Mittelachsen der Austragöffnung 9 und des Steuerventiles 15 und wenigstens in dessen Schließstellung zwischen zwei Dichtlippen des Ventilkörpers 18 an dessen Außenumfang.The control valve 15 forms a valve chamber 17, which is located directly adjacent to the outer circumference and / or inner end of this chamber 16 and is likewise delimited by the outer housing 26 of the discharge head 3, for receiving a valve body 18. The chamber 17 is located at the height of the discharge opening 9 , perpendicular to the central axis of the chamber 16, parallel to the central axis 10, slightly behind an axial plane determined by an inner bottom of the chamber 16, between the associated end of the pump chamber 8 and the handle and / or between the chamber 16 and the outer periphery of the discharge head 3. The bores forming the chambers 16, 17 have approximately the same inner width and are so directly adjacent to one another that a breakthrough as an inflow between their central axes Mouth 20 is formed, which extends only over a part of the inner circumference of the chamber 17 and the inner circumference of the chamber 16 and can also extend in part in the bottom thereof. The mouth 20 is at the level of the discharge opening 9, its central axis is perpendicular to the central axis 10 and the central axes of the discharge opening 9 and the control valve 15 and at least in its closed position between two sealing lips of the valve body 18 on its outer circumference.

Der kolbenartig in der Kammer 17 zwischen einer Schließ- und einer Offenstellung verschiebbare Ventilkörper 18 weist eine ringförmige Ventillippe 21 als Schließglied und eine entgegengesetzt axial ausragende Dichtlippe 22 zur Abdichtung gegenüber einer Federkammer auf. Zwischen beiden Dichtlippen bildet der Außenumfang des Ventilkörpers 18 mit dem Innenumfang der Kammer 17 einen Ringraum, an welchen die Mündung 20 anschließt. Für die Ventillippe 21 ist an dem der Pumpenkammer 8 zugekehrten und vom Kanal 13 durchsetzten Ende der Kammer 17 ein Ventilsitz 19 vorgesehen, der durch einen Innenumfang und/oder die zugehörige Stirn- bzw. Bodenfläche der Kammer 17 gebildet sein kann, an welcher die Ventillippe 21 in Ausgangsstellung unter Vorspannung anliegt.The piston-like valve body 18, which is displaceable in the piston 17 between a closed and an open position, has an annular valve lip 21 as the closing member and an axially projecting sealing lip 22 for sealing against a spring chamber. Between the two sealing lips, the outer circumference of the valve body 18 forms an annular space with the inner circumference of the chamber 17, to which the mouth 20 adjoins. For the valve lip 21, a valve seat 19 is provided on the end of the chamber 17 facing the pump chamber 8 and penetrated by the channel 13, which valve seat can be formed by an inner circumference and / or the associated end or bottom surface of the chamber 17 on which the valve lip 21 is in the initial position under pretension.

An die Umfangsfläche des Ventilsitzes 19 schließt ein konisch erweiterter Abschnitt der Kammer 17 an, der in einen erweiterten zylindrischen Abschnitt übergeht und wie dieser von der Mündung 20 durchsetzt sein kann. An dem erweiterten Abschnitt gleitet die weitere Dichtlippe 22 in jeder Stellung, während die Ventillippe 21 nach einem ersten Axialweg sich vom Ventilsitz 19 löst und berührungsfrei im Bereich des erweiterten bzw. konischen Abschnittes liegt. Dadurch ist der Kanal 13 mit der Mündung 20 leitungsverbunden. Je weiter der Ventilkörper 18 verschoben wird, um so größer wird der Strömungsquerschnitt dieser ringförmigen Leitungsverbindung.A conically widened section of the chamber 17 adjoins the circumferential surface of the valve seat 19, which section merges into an enlarged cylindrical section and how the mouth 20 can pass through it. To the widened section, the further sealing lip 22 slides in any position, while the valve lip 21 separates from the valve seat 19 after a first axial path and lies in the area of the enlarged or conical section without contact. As a result, the channel 13 is line-connected to the mouth 20. The further the valve body 18 is displaced, the larger the flow cross section of this ring-shaped line connection.

Der Ventilkörper 18 ist einteilig mit einem Ventilschaft 23 ausgebildet, welcher in einer benachbart zum Kolbenschaft 11 liegenden Bohrung des Gehäuses 26 geführt ist und mit dieser dadurch den Kanal 13 bildet, daß er am Außenumfang mit Längsnuten versehen ist. In Ausgangsstellung ragt der Ventilschaft 23 geringfügig in die Pumpenkammer 8. An der davon abgekehrten, der Druck-Handhabe zugekehrten Seite ist am Ventilkörper 18 eine vorgespannte Ventilfeder 24 abgestützt, die in die Dichtlippe 22 eingreift und mit einem Abschluß 25 gesichert ist. Der Ventilkörper 18, die Ventilfeder 24 und der Abschluß 25 sind von der Außenseite des Gehäuses 26, nämlich von der Handhabe her, in eine gemeinsame, die Kammer 17 bildende Bohrung eingesetzt. Der Abschluß 25 ist in Form eines Stopfens mit einem Ringwulst in diese Bohrung abgedichtet eingesprengt und bildet mit einem inneren Dorn sowohl eine Führung für die Ventilfeder 24 als auch einen Endanschlag für die maximale Öffnungsstellung des Ventilkörpers 18.The valve body 18 is formed in one piece with a valve stem 23 which is guided in a bore of the housing 26 lying adjacent to the piston stem 11 and thereby forms the channel 13 in that it is provided with longitudinal grooves on the outer circumference. In the initial position, the valve stem 23 protrudes slightly into the pump chamber 8. On the side facing away from the pressure handle, a prestressed valve spring 24 is supported on the valve body 18, which engages in the sealing lip 22 and is secured with a closure 25. The valve body 18, the valve spring 24 and the closure 25 are inserted from the outside of the housing 26, namely from the handle, into a common bore forming the chamber 17. The end 25 is pressed into this bore in the form of a stopper with an annular bead and forms with an inner mandrel both a guide for the valve spring 24 and an end stop for the maximum open position of the valve body 18.

Die Pumpe 6 weist einen am äußeren Ende des Pumpengehäuses der Pumpe 5 starr befestigten und topfförmigen Pumpkolben 27 auf, der in einem kappenförmig bis über die Kappe 4 reichenden Zylinder 28 des Gehäuses 26 geführt ist. Dem Pumpkolben 27 gegenüberliegend ist die Pumpenkammer 8 durch einen Innendeckel 29 begrenzt, welcher am Außenumfang einen Ringraum für den Eintritt des Kolbenmantels frei läßt und der durch Einsprengen so am Boden des Zylinders 28 bzw. am Gehäuse 26 befestigt ist, daß er den Gehäuseraum, welcher einen Steckstutzen für den Kolbenschaft 11, die Auslaß-Kammer 16, das Steuerventil 15 oder dgl. aufnimmt, gegenüber der Pumpenkammer 8 dicht verschließt. Die Stirnwand des Innendeckels 29 ist von dem Kolbenschaft 23 durchsetzt. In Pumphubendstellung füllt der Innendeckel 29 das Innere des Pumpkolbens 27 nahezu vollständig aus, so daß das verbleibende Restvolumen der Pumpenkammer 8 sehr klein ist bzw. die Luft stark verdichtet werden kann.The pump 6 has a pot-shaped pump piston 27 which is rigidly attached to the outer end of the pump housing of the pump 5 and is guided in a cylinder 28 of the housing 26 which extends in a cap-shaped manner beyond the cap 4. Opposite the pump piston 27, the pump chamber 8 is delimited by an inner cover 29 which has an outer circumference Annular space for the entry of the piston skirt leaves free and which is fastened to the bottom of the cylinder 28 or to the housing 26 by being blown in so that the housing space, which has a plug-in socket for the piston skirt 11, the outlet chamber 16, the control valve 15 or the like picks up, closes tightly with respect to the pump chamber 8. The end wall of the inner cover 29 is penetrated by the piston skirt 23. In the pump stroke end position, the inner cover 29 fills the interior of the pump piston 27 almost completely, so that the remaining volume of the pump chamber 8 is very small or the air can be compressed strongly.

Der Pumpkolben 27 ist baulich mit einem Einlaßventil 30 zusammengefaßt, das nahezu vollständig versenkt innerhalb des Kolbenbodens 31 liegt, dessen Ventilkörper 32 als federnder Biegeteller ausgebildet ist und dessen Ventilsitz 36 durch einen Ringwulst gebildet ist. Der Ventilkörper 32 ist einteilig mit einer über seine beiden Stirnseiten vorstehenden Ventilmuffe 34 ausgebildet, welche vom Kolbenschaft 11 abgedichtet durchsetzt und in einer Kolbenmuffe 33 durch Einstecken befestigt ist, die von der äußeren Stirnseite des Kolbenbodens 31 absteht, in das Zylindergehäuse der Pumpe 5 ragt, für diese einen Zylinderdeckel bildet und/oder als Endanschlag für die Ausgangsstellung des Pumpkolbens der Pumpe 5 dient.The pump piston 27 is structurally combined with an inlet valve 30 which is almost completely sunk inside the piston head 31, the valve body 32 of which is designed as a resilient flexible plate and the valve seat 36 is formed by an annular bead. The valve body 32 is formed in one piece with a valve sleeve 34 projecting over its two end faces, which is penetrated by the piston skirt 11 and is fixed in a piston sleeve 33 by insertion, which protrudes from the outer end face of the piston head 31 and projects into the cylinder housing of the pump 5. forms a cylinder cover for this and / or serves as an end stop for the starting position of the pump piston of the pump 5.

Innerhalb der Pumpenkammer 8 gleitet die Ventilmuffe 34 mit mindestens einer Dichtlippe 35 am Außenumfang des Kolbenschaftes 11. Innerhalb des Ventilsitzes 36, der im Bereich des Außenumfanges des Ventilkörpers 32 an dessen Stirnseite liegt sowie über die Bodenfläche einer Vertiefung für die Aufnahme des Ventilkörpers 32 vorsteht, sind benachbart zum Außenumfang der Kolbenmuffe 33 mehrere über den Umfang verteilte Einlaßkanäle 37 vorgesehen, die den Kolbenboden 38 durchsetzen. Bei Unterdruck in der Pumpenkammer 8 wird der Ventilkörper 32 selbstfedernd von seiner linienförmigen Anlage am Ventilsitz 36 abgehoben, so daß über die Einlaßkanäle 37 zwischen dem zugehörigen Ende des Zylindergehäuses der Pumpe 5 und dem Kolbenboden 31 von außen Luft angesaugt wird.Within the pump chamber 8, the valve sleeve 34 slides with at least one sealing lip 35 on the outer circumference of the piston skirt 11. Inside the valve seat 36, which is located in the region of the outer circumference of the valve body 32 on its end face and protrudes beyond the bottom surface of a recess for receiving the valve body 32, are provided adjacent to the outer circumference of the piston sleeve 33 a plurality of inlet channels 37 distributed over the circumference, which the piston crown 38th push through. At negative pressure in the pump chamber 8, the valve body 32 is lifted self-resiliently from its linear contact with the valve seat 36, so that air is drawn in from the outside via the inlet channels 37 between the associated end of the cylinder housing of the pump 5 and the piston head 31.

Bei Durchführung des Pumphubes wird ein Schieber- bzw. Einlaßventil 40 der Pumpe 5 zunächst noch nicht geschlossen, so daß nur in der Pumpenkammer 8 ein Druck aufgebaut wird und das Steuerventil 15 im Sinne der Öffnung belastet. Bei weiterem Pumphub öffnet das Steuerventil 15 wenigstens teilweise, so daß die Luft durch die Mündung 20 und die Austragöffnung 9 beginnt, nach außen zu strömen. Nachdem sich das Einlaßventil 40 geschlossen hat, baut sich in der Pumpenkammer 7 ein Druck auf, der zur Öffnung des Auslaßventiles 14 führt, so daß Flüssigkeit der bereits strömenden Druckluft im Bereich der Kammer 16 zugeführt und dadurch einer zusätzlichen Förderenergie sowie ggf. einer Zerstäubung ausgesetzt wird.When the pump stroke is carried out, a slide valve or inlet valve 40 of the pump 5 is initially not yet closed, so that a pressure is only built up in the pump chamber 8 and the control valve 15 is loaded in the sense of the opening. With a further pumping stroke, the control valve 15 opens at least partially, so that the air through the mouth 20 and the discharge opening 9 begins to flow to the outside. After the inlet valve 40 has closed, a pressure builds up in the pump chamber 7, which leads to the opening of the outlet valve 14, so that liquid is supplied to the already flowing compressed air in the region of the chamber 16 and is thereby exposed to additional conveying energy and possibly atomization becomes.

Gegen Ende des Pumphubes schlägt ein Mitnehmer 38 an einem z.B. durch die Endfläche 39 des Schaftes 23 gebildeten Betätigungsglied des Steuerventiles 15 so an, daß dieses zwangsläufig geöffnet bzw. unabhängig vom Druck offengehalten wird. Außerdem wird in dieser Stellung das Auslaßventil 14 der Pumpe 5 durch Anschlag des zugehörigen Pumpkolbens am Zylinderboden zwangsläufig offengehalten, wobei die Pumpkammer 7 am Ende des Pumphubes sehr schnell drucklos wird, während sich in der Pumpenkammer 8 noch vorgespannte Luft befindet. Diese strömt somit noch weiter aus und reinigt dabei nicht nur die in Strömungsrichtung nach der Mündung 20 liegenden Kanalbereiche, sondern auch wenigstens einen Teil des Auslaßkanales 12 entweder durch Zurückdrücken der Flüssigkeit in Richtung zur Pumpenkammer 7 und/oder durch injektorartiges Herausreißen von Flüssigkeit aus dem Auslaßkanal 12.Towards the end of the pump stroke, a driver 38 strikes an actuating element of the control valve 15, which is formed, for example, by the end face 39 of the shaft 23, in such a way that it is inevitably opened or kept open regardless of the pressure. In addition, in this position, the outlet valve 14 of the pump 5 is inevitably kept open by the stop of the associated pump piston on the cylinder bottom, the pump chamber 7 becoming depressurized very quickly at the end of the pumping stroke, while the pump chamber 8 still contains prestressed air. This thus flows out even further and not only cleans the channel areas lying in the flow direction after the mouth 20, but also at least a part of the outlet channel 12 either by pushing back the liquid in the direction of the pump chamber 7 and / or by injector-like tearing out of liquid from the outlet channel 12.

In Pumphubendstellung wird auch das Einlaßventil 30 zwangsläufig bzw. unabhängig von den Druckverhältnissen geschlossen gehalten. Zu diesem Zweck ist der Mitnehmer 38 durch die zugehörige Stirnfläche des Ventilkörpers 32 gebildet, an dem der Kolbenschaft 23 in Pumphub-Endstellung mit seiner Endfläche 39 zwar nur in einem begrenzten Umfangsbereich, jedoch vorteilhaft so anliegt, daß die dadurch auftretende Schließkraft sich auf den gesamten Ventilkörper 32 auswirkt. Wie Fig. 3 zeigt, kann die zwangsweise Öffnung des Steuerventiles 15 auch nur zu einer teilweisen Öffnung führen, so daß in diesem Fall der Ventilkörper 18 nicht am zugehörigen Anschlag anliegen muß. Durch die beschriebene Verfahrensweise ergibt sich eine sehr vorteilhafte Funktion. Sobald der Austragkopf 3 in der Endstellung freigegeben wird und unter der Kraft einer Rückstellfeder der Pumpe 5 beginnt, sich zurückzubewegen, schließt das Steuerventil 15 unter der Kraft der Ventilfeder 24 bevor eventuelle Restflüssigkeit aus der Kammer 16 in die Kammer 17 angesaugt werden könnte, da der Schließweg des Ventilkörpers 18 sehr klein ist.In the pump stroke end position, the inlet valve 30 is inevitably kept closed regardless of the pressure conditions. For this purpose, the driver 38 is formed by the associated end face of the valve body 32, on which the piston shaft 23 in the pump stroke end position with its end face 39 is only present in a limited circumferential area, but advantageously so that the closing force that occurs is applied to the whole Valve body 32 affects. As shown in FIG. 3, the forced opening of the control valve 15 can only lead to a partial opening, so that in this case the valve body 18 does not have to rest against the associated stop. The procedure described results in a very advantageous function. As soon as the discharge head 3 is released in the end position and begins to move back under the force of a return spring of the pump 5, the control valve 15 closes under the force of the valve spring 24 before any residual liquid from the chamber 16 could be sucked into the chamber 17, since the Closing path of the valve body 18 is very small.

Das Gehäuse 26 bildet einen im Zentrum der Kammer 16 liegenden, in Austragrichtung frei vorstehenden Düsenkern 41, der mit dem Innenumfang der Kammer 16 bzw. eines entsprechenden Kanalabschnittes einen Ringraum für die Aufnahme des Mantels einer Düsenkappe 42 begrenzt, die z.B. ähnlich derjenigen nach Fig. 4 ausgebildet sein kann. Je nach Ausbildung der Düsenkappe, die lediglich durch Einsprengen bzw. einen entsprechenden Festsitz befestigt sein kann, ergibt sich ein bestimmtes Austragverhalten der Austragöffnung, z.B. eine Feinzerstäubung, ein Breitstrahlaustrag oder dgl.. Die Stirnwand 44 der Düsenkappe 42 ist von einem in Strömungsrichtung zuerst konisch verjüngten und anschließend zylindrischen Düsenkanal 45 durchsetzt, dessen äußeres Ende eine Auslaßöffnung 46 bzw. im Falle der Anordnung an der Austragvorrichtung gemäß den Figuren 1 bis 3 die Austragöffnung 9 bildet.The housing 26 forms a nozzle core 41 which lies in the center of the chamber 16 and projects freely in the discharge direction and which, with the inner circumference of the chamber 16 or a corresponding channel section, delimits an annular space for receiving the jacket of a nozzle cap 42, which is similar to that according to FIG. 4 can be formed. Depending on the design of the nozzle cap, which can only be attached by being blown in or a corresponding tight fit, there is a certain discharge behavior of the discharge opening, The end wall 44 of the nozzle cap 42 is penetrated by a nozzle channel 45 which is initially conically tapered in the flow direction and then cylindrical, the outer end of which is an outlet opening 46 or, if arranged on the discharge device according to FIGS. 1 to 3 forms the discharge opening 9.

Am Innenumfang des Mantels 43 sind zwei oder drei gleichmäßig über den Umfang verteilte Längskanäle 47 vorgesehen, die in Querkanäle 48 übergehen, welche an der Innenseite der Stirnwand 44 liegen. Die Längskanäle 47 bzw. die Querkanäle 48 können durch einen Ringkanal 49 unmittelbar miteinander leitungsverbunden sein. Die radial nach innen in der Breite verjüngten Querkanäle 48 münden etwa tangential in den Umfang des inneren, weiteren Endes des Düsenkanales 45 so, daß sich eine Strömungs-Dralleinrichtung für die auszutragende Flüssigkeit ergibt. Im Falle der Ausbildung nach den Figuren 1 bis 3 schließt die Zustrom-Mündung 20 an das hintere Ende der Düsenkappe, der Längskanäle bzw. an einen Ringkanal an, der diese hinteren Enden miteinander verbindet. Die Druckluft tritt somit aus der Mündung 20 in eine Ringkammer ein, in welche auch der Auslaßkanal 12 mündet und von der die Medien unmittelbar in die Kanäle der Düsenkappe eintreten.On the inner circumference of the jacket 43, two or three longitudinal channels 47 are provided which are uniformly distributed over the circumference and which merge into transverse channels 48 which lie on the inside of the end wall 44. The longitudinal channels 47 or the transverse channels 48 can be directly connected to one another by a ring channel 49. The radially inwardly tapered transverse channels 48 open approximately tangentially into the circumference of the inner, further end of the nozzle channel 45 so that there is a flow swirl device for the liquid to be discharged. In the case of the embodiment according to FIGS. 1 to 3, the inflow mouth 20 connects to the rear end of the nozzle cap, the longitudinal channels or an annular channel which connects these rear ends to one another. The compressed air thus enters from the mouth 20 into an annular chamber into which the outlet channel 12 also opens and from which the media enter directly into the channels of the nozzle cap.

Die Ausbildung nach den Figuren 4 und 5 kann die beschriebene Düsenanordnung nach den Figuren 1 bis 3 und/oder das Steuerventil 15 nach Ausbildung und/oder Lage ersetzen oder zusätzlich vorgesehen sein. Diese Ausbildung bildet ebenfalls ein Steuerventil 50, das gesonderte Regelfunktionen bzw. Einflüsse auf beide Medienströme bzw. nach deren Zusammenführung auf den Gesamtstrom hat. Das Steuerventil 50 liegt achsgleich zur Austragöffnung 9a am Außenumfang des Austragkopfes 3a und vollständig innerhalb von diesem. Die Zustrom-Mündung liegt nicht unmittelbar benachbart und im etwa rechten Winkel zur Ventilöffnung, sondern ist durch die Ventilöffnung gebildet. Ihre Weite ändert sich stufenlos mit dem auftretenden Luftdruck.The design according to FIGS. 4 and 5 can replace the described nozzle arrangement according to FIGS. 1 to 3 and / or the control valve 15 according to design and / or location, or it can be additionally provided. This design also forms a control valve 50, which has separate control functions or influences on both media flows or, after their combination, on the total flow. The control valve 50 is axially aligned with the discharge opening 9a on the outer circumference of the discharge head 3a and completely within it. The inflow mouth is not immediately adjacent and at approximately the right angle to the valve opening, but is formed by the valve opening. Their width changes continuously with the air pressure.

Ein an den Ventilsitz unmittelbar anschließender Ringkanal für den Hüllstrom ist durch zwei ineinanderliegende, konische Begrenzungsflächen gebildet, die axial gegeneinander so bewegbar sind, daß die Weite dieses Ringkanales veränderbar ist. Die äußere Begrenzungsfläche, die die Austragöffnung 9a bildet, reicht schon in Ausgangsstellung in Strömungsrichtung weiter als die innere Begrenzungsfläche und kann als Ganzes vor diese innere Begrenzungsfläche verschoben werden, so daß der Ringkanal dann in einen konischen Vollkanal übergeht. In einer vorderen Endfläche der inneren Begrenzungsfläche ist die Auslaßöffnung 46 vorgesehen, die gegenüber der Austragöffnung 9a zurückversetzt und gegenüber dem Ventilsitz 19a vorversetzt ist.An annular channel for the enveloping flow directly adjoining the valve seat is formed by two conical boundary surfaces lying one inside the other, which can be moved axially relative to one another such that the width of this annular channel can be changed. The outer boundary surface, which forms the discharge opening 9a, extends further in the starting direction in the direction of flow than the inner boundary surface and can be moved as a whole in front of this inner boundary surface, so that the annular channel then merges into a conical full channel. In a front end face of the inner boundary surface, the outlet opening 46 is provided, which is set back with respect to the discharge opening 9a and is set forward with respect to the valve seat 19a.

Über die ebene Außenseite der Stirnwand 44 der Düsenkappe 42 steht ein kegelstumpfförmiger Stutzen vor, der die innere Begrenzungsfläche 51 bildet. Diese ist von einer erweiterten, jedoch in gleicher Weise kegelstumpfförmigen Öffnung in der Stirnwand 54 des kappenförmigen Ventilkörpers 18a umgeben, welche die äußere Begrenzungsfläche 52 bildet. Diese bildet eine innere Flanke einer nach hinten ringförmig vorstehenden, spitzwinklig schneidenförmigen Steuerkante 21a für die schließende Anlage am Ventilsitz 19a. Die Begrenzungsfläche 52 geht in das Zentrum einer flachschalenförmigen Vertiefung an der Außenseite der Stirnwand 54 über.A truncated cone-shaped neck protrudes beyond the flat outside of the end wall 44 of the nozzle cap 42 and forms the inner boundary surface 51. This is surrounded by an enlarged, but in the same way frustoconical opening in the end wall 54 of the cap-shaped valve body 18a, which forms the outer boundary surface 52. This forms an inner flank of a control edge 21a which protrudes in a ring shape at the rear and has an acute-angled cutting edge for the closing contact with the valve seat 19a. The boundary surface 52 merges into the center of a flat-shell-shaped depression on the outside of the end wall 54.

Die Stirnwand 54 des kappenförmigen, die Düsenkappe 42 annähernd auf ganzer Länge aufnehmenden Ventilkörpers 18a ist einteilig mit einem die Düsenkappe 42 eng umgebenden Mantel 55 und einem Kolben 56 ausgebildet, der am hinteren Mantelende vorgesehen und in einem Zylinder 57 des Gehäuses des Austragkopfes 3a gegen die Kraft der Ventilfeder 24a verschiebbar ist. Am Innenumfang des Mantels 55 sind mehrere über den Umfang verteilte Längsnuten vorgesehen, die durch den Außenumfang der Düsenkappe 42 als Längskanäle 58 begrenzt sind und an der Innenseite der Stirnwand 54 in ringsegmentförmige Querkanäle 59 übergehen, welche nur durch schmale bzw. Zwischenstege 60 voneinander getrennt sind, die in Schließstellung ebenfalls einen geringen Spaltabstand von der Stirnfläche bzw. dem Ventilsitz 19a haben.The end wall 54 of the cap-shaped valve body 18a, which receives the nozzle cap 42 almost over its entire length, is formed in one piece with a jacket 55 closely surrounding the nozzle cap 42 and a piston 56, which is provided at the rear jacket end and in a cylinder 57 of the housing of the discharge head 3a against the Force of the valve spring 24a is displaceable. On the inner circumference of the jacket 55, a plurality of longitudinal grooves distributed over the circumference are provided, which are delimited by the outer circumference of the nozzle cap 42 as longitudinal channels 58 and on the inside of the end wall 54 merge into ring segment-shaped transverse channels 59, which are separated from one another only by narrow or intermediate webs 60 which also have a small gap distance from the end face or the valve seat 19a in the closed position.

Der am hinteren Ende des Mantels 55 bzw. des Kolbens 56 liegende Druckraum des Zylinders 57 ist ggf. ohne Zwischenschaltung eines weiteren Ventiles über den Auslaßkanal an die Pumpenkammer 8 angeschlossen. In entsprechender Weise sind die Längskanäle 47 bzw. deren gemeinsamer, hinterer Anschlußkanal an den Auslaßkanal der Pumpe 5 ggf. ventilgesteuert angeschlossen.The pressure chamber of the cylinder 57 located at the rear end of the jacket 55 or the piston 56 is connected to the pump chamber 8 via the outlet channel, if necessary, without the interposition of a further valve. In a corresponding manner, the longitudinal channels 47 or their common, rear connection channel are connected to the outlet channel of the pump 5, if necessary in a valve-controlled manner.

Bei Betätigung der Austragvorrichtung wird zunächst Luft gefördert, die das Steuerventil 50 öffnet und über den Ringkanal 53 durch die Austragöffnung 9a austritt. Dann beginnt die Förderung der Flüssigkeit, die nach Öffnung des Auslaßventiles 14 schlagartig durch die Auslaßöffnung 46 austritt und ins Zentrum des bereits fließenden Hüllstromes in einem Bereich injiziert wird, in dem dieser Hüllstrom durch Querschnittsverringerung beschleunigt ist und die Austragöffnung 9a nahezu verlassen hat.When the discharge device is actuated, air is first conveyed, which opens the control valve 50 and exits through the discharge opening 9a via the ring channel 53. Then the pumping of the liquid begins which, after opening of the outlet valve 14, suddenly emerges through the outlet opening 46 and is injected into the center of the already flowing envelope flow in an area in which this envelope flow is accelerated by reducing the cross-section and has almost left the discharge opening 9a.

Beim Öffnen des Steuerventiles 50 heben die nutförmigen Querkanäle 59 bzw. die Zwischenstege 60 so vom Ventilsitz 19a ab, daß ein über den Umfang im wesentlichen ununterbrochen durchgehender, scheibenförmiger Gesamtkanal gebildet ist und die Luft von allen Seiten radial nach innen in die Öffnung der Stirnwand 54 strömt. Am Ende der Pumpbetätigung hört die Flüssigkeitsförderung schlagartig auf, während sich der Ventilkörper 18a unter der Kraft der Rückstellfeder zurückbewegt, so daß aus der Zylinderkammer des Kolbens 56 noch Luft zur Reinigung nachgefördert wird. Die am Kolben 56 abgestützte und den Mantel 55 umgebende Ventilfeder 24a liegt mit ihrem vorderen Ende an einem ringförmigen Abschluß 25a an, der den Ventilkörper 18a umgibt und in das Gehäuse des Austragkopfes 3a eingesprengt ist. Der Ventilkörper 18a kann an diesem Abschluß 25a geführt sein und ist wie dieser bzw. die Düsenkappe 42 vom Außenumfang des Gehäuses her in eine Bohrung eingesetzt, welche den Zylinder 57 bildet und in die der Düsenkern 41a hineinragt.When the control valve 50 is opened, the groove-shaped transverse channels 59 or the intermediate webs 60 are lifted off the valve seat 19a in such a way that a disk-shaped overall channel is formed which is essentially continuous and continuous, and the air radially inwards from all sides into the opening of the end wall 54 flows. At the end of the pump actuation, the liquid delivery stops suddenly, while the valve body 18a moves back under the force of the return spring, so that air is still supplied for cleaning from the cylinder chamber of the piston 56. The valve spring 24a, which is supported on the piston 56 and surrounds the jacket 55, rests with its front end on an annular end 25a which surrounds the valve body 18a and is blown into the housing of the discharge head 3a. The valve body 18a can be guided at this end 25a and, like this or the nozzle cap 42, is inserted from the outer circumference of the housing into a bore which forms the cylinder 57 and into which the nozzle core 41a projects.

Durch die erfindungsgemäße Ausbildung kann eine sehr feine Zerstäubung bei einfacher Herstellung und Montage erreicht werden. Lediglich durch Verwendung unterschiedlicher Düsen kann das Sprüh- bzw. Zerstäubungsverhalten vielfältig beeinflußt werden. Die Druckverluste, insbesondere der Druckluft, sind äußerst gering, da das einzige Auslaßventil der Luftpumpe sehr nahe bei oder unmittelbar an der Austragöffnung liegt und zwischen der Ausgangsöffnung dieses Ventiles und der Austragöffnung nur noch ein kurzer, annähernd geradliniger Kanal vorgesehen sein muß. Mindestens ein Medium kann auch durch Speicherung unter Druck in einem Behälter gefördert werden, so daß der Betätigungshub lediglich zur Öffnung eines Auslaßventiles dient.The design according to the invention enables very fine atomization to be achieved with simple manufacture and assembly. The spraying or atomizing behavior can be influenced in many ways only by using different nozzles. The pressure losses, in particular of the compressed air, are extremely low, since the only outlet valve of the air pump is very close to or directly at the discharge opening and only a short, approximately rectilinear channel has to be provided between the outlet opening of this valve and the discharge opening. At least one medium can also be conveyed by storing it under pressure in a container, so that the actuation stroke only serves to open an outlet valve.

Claims (11)

  1. Discharge device for at least one medium, with at least one discharge opening (9,9a), which with a discharge duct (12) connected thereto defines an outlet flow and into a duct connected to the discharge opening (9,9a) such as the outlet duct (12) an inflow duct (13) issues in the vicinity of an inflow opening (20) and with which is associated at least one inflow control valve (15,50), particularly for pressurized gas, having at least one substantially closable valve opening, characterized in that the at least one inflow opening (20) issues into the duct immediately adjacent to the valve opening of the at least one inflow control valve (15,50).
  2. Discharge device according to claim 1, characterized in that the valve opening of at least one control valve (15,50) is bounded by a valve seat (19,19a) for a movable valve body (18,18a), that in particular at least one inflow opening (20) is at least partly formed by the valve opening, that preferably at least one inflow opening (20) is located in the flow direction upstream and/or at least one inflow opening is located in the vicinity of the discharge opening (9,9a) and in particular is directly bounded by a valve seat (19,19a) and a valve body (18,18a) and that preferably in the vicinity of the discharge opening (9,9a) is provided a substantially linear end portion of the outlet flow, at least one control valve (15,50) issuing directly into said end portion and/or into longitudinal ducts (47) of a swirling device.
  3. Discharge device according to claim 1 or 2, characterized in that the discharge device, at least for the inflow, has a pressure source, particularly a compressed air pump (6) and that preferably at least one inflow duct (13) provided between a pressure chamber (8) of the pressure source and at least one control valve (15,50) located adjacent to the at least one inflow opening (20) is at least free from pressure-dependent controlled valves and at least one control valve (15,50) is provided substantially at the end of the inflow duct (13) and is in particular controlled in pressure-dependent manner.
  4. Discharge device according to one of the preceding claims, characterized in that at least one control valve (15,50) has a valve chamber (17) upstream of the valve closing faces and that at least one of the valve closing faces is immediately adjacent to the outlet flow or connects the valve chamber with a portion of the outlet duct (12) and in particular a flow chamber (16) for one medium and the valve chamber (17) are separated from one another by a common chamber wall traversed by at least one inflow opening (20).
  5. Discharge device according to one of the preceding claims, characterized in that at least one discharge opening (9a,46) is formed by a nozzle body bounding at least one duct portion, such as a nozzle cap (42), that in particular at least one valve closing face of the control valve (15,50) is directly adjacent to at least one duct portion of the nozzle body and that preferably at least one inflow opening (20) is located in the inner circumference of a bore (16,52) approximately coaxial to the discharge opening (9,9a) and in particular forms a reception bore for a nozzle body and/or is formed by a circumferential area of the bore of a valve chamber (17), which is positioned transversely to the reception bore (16) and is tangentially adjacent thereto.
  6. Discharge device according to one of the preceding claims, characterized in that at least one inflow opening (20) at least partially in spaced manner surrounds the outlet flow particularly the discharge opening (9a) and preferably issues into the discharge flow via a ring nozzle (52) constricted in the flow direction and/or that valve closing faces of a control valve (15,50) are formed by end faces, which are in particular located on the inside of an end wall (54) traversed by the discharge opening (9a) and which is preferably displaceable against spring tension and formed by a nozzle body.
  7. Discharge device according to one of the preceding claims, characterized in that there are two nozzle bodies (18a,42) engaging over one another and whereof at least one outer body is cap-shaped, preferably the inner nozzle body forms a projecting outlet nozzle duct (45) and the other nozzle body an inflow discharge nozzle (52) surrounding the latter and/or that at least one nozzle body (42) having a discharge opening (9a) is displaceable with a piston (56) constructed in one piece therewith and surrounded by a restoring spring (24a) and preferably a cylinder zone for the piston (56) is interposed in an inflow duct.
  8. Discharge device according to one of the preceding claims, characterized in that at least one nozzle body (18a) bounding at least one discharge opening (9a,46) is axially movably arranged in at least two positions, particularly under medium pressure and that with at least two positions of the nozzle body are associated different flow conditions of at least one medium or different opening widths of at least one discharge opening.
  9. Discharge device according to one of the preceding claims, characterized by a substantially forcibly controlled opening of at least one valve, particularly at least one control valve (15) and/or discharge valve (14) towards the end of an operating stroke of the discharge device and preferably the control valve (15) has on a valve body (18) a valve shaft (23), which at the end of the operating stroke strikes against the piston head (31) of a pump piston (27) of an inflow pump (6).
  10. Discharge device according to one of the preceding claims, characterized in that a compressed air pump (6) provided as the inflow pump has an air delivery valve (30), whose valve body (32) is formed by a resiliently deformable valve disk in particular constructed in one piece with a valve collar (34), which is preferably guided with at least one sealing lip (35) on a piston shaft (11) which traverses it.
  11. Discharge device according to one of the preceding claims, characterized in that at least two separate pumps (5,6) with separate discharge ducts for joint operation are constructionally combined and are located in particular in axially directly adjacent manner and at least partially within a casing (26) of a discharge head (3), in which are inserted from the outside preferably at least one valve body (18,18a) of at least one control valve (15,50) and securing takes place with a sprung-in seal (25,25a).
EP91104833A 1990-04-10 1991-03-27 Discharge device for at least one medium Expired - Lifetime EP0451615B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4011537A DE4011537A1 (en) 1990-04-10 1990-04-10 DISCHARGE DEVICE FOR AT LEAST ONE MEDIUM
DE4011537 1990-04-10

Publications (3)

Publication Number Publication Date
EP0451615A2 EP0451615A2 (en) 1991-10-16
EP0451615A3 EP0451615A3 (en) 1992-08-12
EP0451615B1 true EP0451615B1 (en) 1995-08-16

Family

ID=6404120

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91104833A Expired - Lifetime EP0451615B1 (en) 1990-04-10 1991-03-27 Discharge device for at least one medium

Country Status (4)

Country Link
EP (1) EP0451615B1 (en)
AT (1) ATE126457T1 (en)
DE (2) DE4011537A1 (en)
ES (1) ES2075242T3 (en)

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US5348189A (en) * 1991-04-10 1994-09-20 Bespak Plc Air purge pump dispenser
FR2677617B1 (en) * 1991-06-17 1995-01-06 Oreal DEVICE FOR SPRAYING A LIQUID LIKELY TO CURE BY DRYING, PARTICULARLY A LACQUER, AND PUSH-BUTTON FOR SUCH A DEVICE.
FR2688714B1 (en) * 1992-03-20 1994-06-17 Oreal LIQUID DISPENSER HAVING A DISPENSING PUMP AND DISPENSING PUMP FOR SUCH A DISPENSER.
US5397059A (en) * 1992-03-20 1995-03-14 L'oreal Dispenser equipped with a liquid pump and a pressurized gas/liquid nozzle
US5350116A (en) * 1993-03-01 1994-09-27 Bespak Plc Dispensing apparatus
US5458289A (en) * 1993-03-01 1995-10-17 Bespak Plc Liquid dispensing apparatus with reduced clogging
DE4331279A1 (en) * 1993-09-15 1995-03-16 Siemens & Co Gmbh & Co Kg Method and device for producing an aerosol
DE4227899A1 (en) * 1993-09-24 1994-02-24 Pfeiffer Erich Gmbh & Co Kg Discharge mechanism for fluidic media with discharge head(s) - has distributor(s) with medium receiver(s) for distribution and stationary reception of at least one medium
FR2719789B1 (en) * 1994-05-10 1996-07-05 Saint Laurent Parfums Yves Device for dispensing a product mixed with a fluid, dispensing assembly comprising such a device.
EP0853499A1 (en) * 1995-10-04 1998-07-22 Inventatrade AG Method and device for dispensing liquid, pasty or foamed products in portions
DE10033274C2 (en) * 1999-05-14 2003-08-14 Bernd Pfalz Quick cold spray nozzle
US7147135B2 (en) 2002-07-25 2006-12-12 Valois Sas Manually actuated fluid dispenser pump
FR2842875B1 (en) * 2002-07-25 2006-02-10 Valois Sa MANUAL ACTUATED FLUID PRODUCT DELIVERY PUMP
DE10306686A1 (en) 2003-02-12 2004-08-26 Ing. Erich Pfeiffer Gmbh Discharge device for the manual generation of a volume flow

Citations (1)

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EP0392238A1 (en) * 1989-04-08 1990-10-17 Ing. Erich Pfeiffer GmbH & Co. KG Dispensing facility for media

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US4111367A (en) * 1977-02-18 1978-09-05 Ethyl Corporation Finger operated spray pump
US4179049A (en) * 1977-04-29 1979-12-18 Avon Products, Inc. Pump dispenser
FR2397341A1 (en) * 1977-07-12 1979-02-09 Oreal CONTAINER INTENDED FOR THE DISTRIBUTION OF A SPRAYED LIQUID WITH ADDITIONAL GAS INJECTION
US4146155A (en) * 1977-11-14 1979-03-27 Security Plastics Inc. Continuous trigger activated pumping system
JPS61905Y2 (en) * 1979-06-28 1986-01-13
DE3722469A1 (en) * 1987-07-08 1989-01-19 Pfeiffer Erich Gmbh & Co Kg HAND-OPERATED DISCHARGE DEVICE FOR MEDIA

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
EP0392238A1 (en) * 1989-04-08 1990-10-17 Ing. Erich Pfeiffer GmbH & Co. KG Dispensing facility for media

Also Published As

Publication number Publication date
ES2075242T3 (en) 1995-10-01
DE4011537A1 (en) 1991-10-17
ATE126457T1 (en) 1995-09-15
EP0451615A3 (en) 1992-08-12
DE59106244D1 (en) 1995-09-21
EP0451615A2 (en) 1991-10-16

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