EP0831277A1 - Baking oven with a catalyst - Google Patents

Baking oven with a catalyst Download PDF

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Publication number
EP0831277A1
EP0831277A1 EP97114675A EP97114675A EP0831277A1 EP 0831277 A1 EP0831277 A1 EP 0831277A1 EP 97114675 A EP97114675 A EP 97114675A EP 97114675 A EP97114675 A EP 97114675A EP 0831277 A1 EP0831277 A1 EP 0831277A1
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EP
European Patent Office
Prior art keywords
catalyst
catalytic converter
oven
oven muffle
partial
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Granted
Application number
EP97114675A
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German (de)
French (fr)
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EP0831277B1 (en
Inventor
Johann Klement
Christian Dipl.-Ing. Zimmermann
Erich-Olaf Fischer
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BSH Hausgeraete GmbH
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BSH Bosch und Siemens Hausgeraete GmbH
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Publication of EP0831277A1 publication Critical patent/EP0831277A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes
    • F24C15/2007—Removing cooking fumes from oven cavities
    • F24C15/2014—Removing cooking fumes from oven cavities with means for oxidation of cooking fumes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C14/00—Stoves or ranges having self-cleaning provisions, e.g. continuous catalytic cleaning or electrostatic cleaning
    • F24C14/02—Stoves or ranges having self-cleaning provisions, e.g. continuous catalytic cleaning or electrostatic cleaning pyrolytic type

Definitions

  • the present invention relates to a catalyst for use in an oven with a lockable oven muffle by at least one heating element is heated, an effective surface of the catalyst by a Precious metal layer is formed.
  • Such a catalyst is known from German specification DE 28 17 101, the catalyst passing through a ceramic disc with a plurality of holes small diameter is formed. During the cooking process or during a subsequent pyrolytic self-cleaning process flow the resulting Gases through the catalyst and are burned there or converted catalytically.
  • Another catalyst is known from German published application DE 41 39 904 A1, the catalyst being made from a self-supporting knitted wire.
  • An aluminum-containing alloy is particularly suitable as the wire, if appropriate Contains cerium. With the help of the catalyst is in the closed oven muffle circulating air cleaned.
  • a catalyst is known from German published patent application DE 41 42 336 A1 known that in a vapor outlet opening in the ceiling area of the oven muffle sits. As a result, vapors removed from the oven become a catalytic reaction for burning or neutralizing unpleasant odors.
  • the object of the present invention is to provide a catalyst with which improved cleaning of the gases is possible.
  • this is achieved in that the catalyst for the breakdown of the Heating the oven muffle released formaldehyde is used.
  • the catalyst for the breakdown of the Heating the oven muffle released formaldehyde is used.
  • formaldehyde concentration by both the catalyst Baking process and the self-cleaning process significantly reduced. So far the formation of formaldehyde only when the oven is first heated considered its first commissioning as relevant. This creates the formaldehyde when burning production-related oil or grease residues on the Oven muffle. It was therefore always recommended during the first heating process ventilate the kitchen when starting up the oven and at the same time to leave. Appropriate instructions for the pyrolytic self-cleaning operation are generally unknown so far.
  • the catalyst is advantageously formed by a wire mesh, in particular good flowability of the catalyst and at the same time a large surface area to provide for the catalytic reaction.
  • the catalyst is in a flow-through, Pot-shaped housing arranged. This facilitates the manufacture and the Assembly of the catalytic converter. The same purpose and the easy cleanability of the The measures according to claim 4 serve as a catalyst.
  • the Catalyst at least two partial catalysts arranged one behind the other in terms of flow technology on. While, for example, palladium as a catalyst material for degradation of formaldehyde, a platinum coating contributes in particular to the reduction of carbon monoxide at. So there is a risk of adverse mutual influence of smells of the two partial catalysts is reduced, is between the at least two partial catalysts an uncoated, possibly coarse mesh Neutral filter arranged. This also helps to even out the Flow through the catalyst.
  • the catalytic effect is particularly pronounced at the high temperatures occur in pyrolytic self-cleaning operation.
  • An oven 1 has a housing 3 which encloses an oven muffle 5. This is clad in a manner known per se with a thermal insulation material and on its front can be closed with an oven door 7.
  • the door consists of one metallic door floor 9, in which a viewing window 11 is held. In the front area the door 7 is on the door bottom 9 a front window spaced from the viewing window 13 attached. Between the door floor 9 and an oven flange 15 is a essentially 17 sealing the entire muffle opening arranged.
  • At the oven 1 is for pyrolytic self-cleaning operation suitable, whereby all components according to the occurring particularly high operating temperatures are designed.
  • a vapor opening 21 is also provided in this, which consists of several individual openings 22 (Fig. 2). Via a funnel-shaped connector 23, the vapor opening 21 is connected to a blow-out duct 25 which opens into the open above the door 7 in the front area of the oven 1. In the blow-out duct 25, a fan 27 for sucking air from the oven muffle 5 is arranged.
  • a catalyst 35 is arranged in the area of the vapor opening 21.
  • the catalyst has a cup-shaped housing 37 made of a good heat-conducting material, in particular Aluminum, in the bottom of which several suction openings 39 are formed are.
  • an attachment opening 41 In the middle of the bottom of the housing 37 there is an attachment opening 41, through which a fastening screw 43 is pushed through the catalyst 35 can be and in a mounting plate 45 of the top wall 20 of the Oven muffle 5 can be screwed.
  • a bent peripheral edge 47 of the Catalyst housing 37 is pressed against the top wall 20. In the direction of flow three flat wire meshes are arranged one behind the other, the large contact surfaces with each other and to the inner wall of the housing 37 and the Have top wall 20.
  • the first wire mesh forms the first partial catalyst 49.
  • the wire used for this is coated with palladium and serves in particular for the reduction of formaldehyde.
  • the second wire mesh is through an uncoated one Metal wire formed as a neutral filter 51.
  • the flow resistance of the neutral filter 51 is less than that of the first partial catalytic converter 49 and a second partial catalytic converter 53, the flow technology after the neutral filter 51 and by the first partial catalytic converter 49 is arranged spatially separated.
  • the knitted fabric of the second Partial catalyst 53 is formed from a platinum-coated metal wire for Burn or neutralize other odors or pollutants.

Abstract

A catalyst for a baking oven in which the closed chamber includes heating element(s) has an active surface formed by a layer of precious metal to decompose formaldehyde released by heating the oven chamber (5).

Description

Die vorliegende Erfindung betrifft einen Katalysator zur Verwendung in einem Backofen mit einer verschließbaren Backofenmuffel, die von mindestens einem Heizelement beheizbar ist, wobei eine wirksame Oberfläche des Katalysators durch eine Edelmetallschicht gebildet ist.The present invention relates to a catalyst for use in an oven with a lockable oven muffle by at least one heating element is heated, an effective surface of the catalyst by a Precious metal layer is formed.

Ein derartiger Katalysator ist bekannt aus der deutschen Auslegeschrift DE 28 17 101, wobei der Katalysator durch eine Keramikscheibe mit einer Vielzahl von Löchern kleinen Durchmessers gebildet ist. Während des Garprozesses oder während eines nachfolgenden pyrolytischen Selbstreinigungsprozesses strömen die dabei entstehenden Gase durch den Katalysator und werden dort verbrannt bzw. katalytisch umgesetzt.Such a catalyst is known from German specification DE 28 17 101, the catalyst passing through a ceramic disc with a plurality of holes small diameter is formed. During the cooking process or during a subsequent pyrolytic self-cleaning process flow the resulting Gases through the catalyst and are burned there or converted catalytically.

Ein weiterer Katalysator ist bekannt aus der deutschen Offenlegungsschrift DE 41 39 904 A1, wobei der Katalysator aus einem selbsttragenden Drahtgewirke hergestellt ist. Als Draht eignet sich dabei insbesondere eine aluminiumhaltige Legierung, die gegebenenfalls Cer enthält. Mit Hilfe des Katalysators wird die in der geschlossenen Backofenmuffel zirkulierende Luft gereinigt.Another catalyst is known from German published application DE 41 39 904 A1, the catalyst being made from a self-supporting knitted wire. An aluminum-containing alloy is particularly suitable as the wire, if appropriate Contains cerium. With the help of the catalyst is in the closed oven muffle circulating air cleaned.

Weiter ist aus der deutschen Offenlegungsschrift DE 41 42 336 A1 ein Katalysator bekannt, der in einer Wrasenaustrittsöffnung im Deckenbereich der Backofenmuffel sitzt. Dadurch wird aus dem Backofen abgeführter Wrasen einer katalytischen Reaktion zum Verbrennen bzw. Neutralisieren unangenehmer Geruchsstoffe unterzogen. Furthermore, a catalyst is known from German published patent application DE 41 42 336 A1 known that in a vapor outlet opening in the ceiling area of the oven muffle sits. As a result, vapors removed from the oven become a catalytic reaction for burning or neutralizing unpleasant odors.

Aus der europäischen Patentanmeldung EP 0 209 887 und der deutschen Patentschritt DE 35 16 847 C2 sind katalytische Nachverbrenner für Backöfen oder dergleichen bekannt, um beispielsweise bei sogenannten selbstreinigenden Backöfen nach dem pyrolytischen Prinzip den entstehenden Rauch zu weitgehend geruch- und schadstoffreien Abgasen zu oxydieren oder den bei Koch-, Back- oder Bratvorgängen entstehenden Wrasen durch Oxydation schädliche oder störende Wirkungen zu nehmen. Hierbei ist es wesentlich, die katalytisch wirkende Schicht auf eine Arbeitstemperatur zu bringen, bei der sich eine optimierte Wirkung ergibt. Diese Arbeitstemperatur liegt meistens höher als die Temperatur des zuströmenden Rauches bzw. Wrasens.From European patent application EP 0 209 887 and the German patent step DE 35 16 847 C2 are catalytic afterburners for ovens or the like known, for example, in so-called self-cleaning ovens According to the pyrolytic principle, the resulting smoke is largely odorless to oxidize pollutant-free exhaust gases or during cooking, baking or roasting processes vapors generated by oxidation to take harmful or disruptive effects. It is essential here that the catalytically active layer is at a working temperature to bring with which there is an optimized effect. This working temperature is usually higher than the temperature of the incoming smoke or fumes.

Aufgabe der vorliegenden Erfindung ist es, einen Katalysator bereitzustellen, mit dem eine verbesserte Reinigung der Gase möglich ist.The object of the present invention is to provide a catalyst with which improved cleaning of the gases is possible.

Erfindungsgemäß ist dies dadurch erreicht, daß der Katalysator zum Abbau von beim Beheizen der Backofenmuffel freiwerdendem Formaldehyd dient. Völlig überraschend wurde festgestellt, daß bei jedem Backvorgang geringe Mengen an Formaldehyd und bei jedem pyrolytischen Selbstreinigungsvorgang größere Mengen an Formaldehyd in der Backofenmuffel entstehen und aus dieser in die Küche entweichen. Überraschenderweise wird durch den Katalysator die Formaldehyd-Konzentration sowohl beim Backvorgang als auch beim Selbstreinigungsvorgang deutlich Verringert. Bisher wurde die Entstehung von Formaldehyd lediglich beim ersten Aufheizen eines Backofens bei dessen erstmaliger Inbetriebnahme als relevant erachtet. Dabei entsteht das Formaldehyd bei der Verbrennung von fertigungsbedingten Öl- bzw. Fettrückständen an der Backofenmuffel. Es wurde deshalb stets empfohlen, während des ersten Aufheizvorganges bei der Inbetriebnahme des Backofens die Küche zu belüften und gleichzeitig zu verlassen. Entsprechende Anweisungen für den pyrolytischen Selbstreinigungsbetrieb sind bisher allgemein unbekannt.According to the invention this is achieved in that the catalyst for the breakdown of the Heating the oven muffle released formaldehyde is used. Completely surprising it was found that small amounts of formaldehyde and larger quantities of formaldehyde in each pyrolytic self-cleaning process the oven muffle arise and escape from this into the kitchen. Surprisingly is the formaldehyde concentration by both the catalyst Baking process and the self-cleaning process significantly reduced. So far the formation of formaldehyde only when the oven is first heated considered its first commissioning as relevant. This creates the formaldehyde when burning production-related oil or grease residues on the Oven muffle. It was therefore always recommended during the first heating process ventilate the kitchen when starting up the oven and at the same time to leave. Appropriate instructions for the pyrolytic self-cleaning operation are generally unknown so far.

Vorteilhafterweise ist der Katalysator durch ein Drahtgewirk gebildet, um insbesondere eine gute Durchströmbarkeit des Katalysators und gleichzeitig eine große Oberfläche für die katalytische Reaktion bereitzustellen.The catalyst is advantageously formed by a wire mesh, in particular good flowability of the catalyst and at the same time a large surface area to provide for the catalytic reaction.

Gemäß einer bevorzugten Ausstellungsform ist der Katalysator in einem durchströmbaren, topfförmigen Gehäuse angeordnet. Dies erleichtert die Herstellung und die Montage des Katalysators. Demselben Zweck und der einfachen Reinigbarkeit des Katalysators dienen die Maßnahmen gemäß Patentanspruch 4. According to a preferred embodiment, the catalyst is in a flow-through, Pot-shaped housing arranged. This facilitates the manufacture and the Assembly of the catalytic converter. The same purpose and the easy cleanability of the The measures according to claim 4 serve as a catalyst.

Um die Wirksamkeit des Katalysators zu erhöhen oder mit größerer Wirkung ein breiteres Band an Schadstoffen bzw. Geruchsstoffen aus der Luft zu entfernen, weist der Katalysator mindestens zwei strömungstechnisch hintereinander angeordnete Teilkatalysatoren auf. Während beispielsweise Palladium als Katalysatormaterial zum Abbau von Formaldehyd dient, trägt eine Platinbeschichtung insbesondere zur Kohlenmonoxid-Verringerung bei. Damit die Gefahr einer nachteiligen gegenseitigen Geruchsbeeinflussung der beiden Teilkatalysatoren verringert ist, ist zwischen den mindestens zwei Teilkatalysatoren ein unbeschichtetes, gegebenenfalls grobmaschigeres Neutralfilter angeordnet. Dies trägt zusätzlich auch zu einer Vergleichmäßigung der Strömung durch den Katalysator bei.To increase the effectiveness of the catalyst or with a larger effect a wider one To remove the band of pollutants or odorous substances from the air, the Catalyst at least two partial catalysts arranged one behind the other in terms of flow technology on. While, for example, palladium as a catalyst material for degradation of formaldehyde, a platinum coating contributes in particular to the reduction of carbon monoxide at. So there is a risk of adverse mutual influence of smells of the two partial catalysts is reduced, is between the at least two partial catalysts an uncoated, possibly coarse mesh Neutral filter arranged. This also helps to even out the Flow through the catalyst.

Um den Katalysator auf eine ausreichende Betriebstemperatur zu erwärmen, ohne eine zusätzliche Spezialheizung für den Katalysator bereitstellen zu müssen, ist vorteilhafterweise der Katalysator im Bereich einer üblicherweise in der Backofenmuffel angeordneten Oberhitze befestigt.To heat the catalytic converter to a sufficient operating temperature without one Having to provide additional special heating for the catalyst is advantageous the catalyst in the area of a usually arranged in the oven muffle Top heat attached.

Die katalytische Wirkung ist besonders ausgeprägt bei den hohen Temperaturen, die beim pyrolytischen Selbstreinigungsbetrieb auftreten.The catalytic effect is particularly pronounced at the high temperatures occur in pyrolytic self-cleaning operation.

Nachfolgend ist anhand schematischer Darstellungen ein Ausführungsbeispiel des erfindungsgemäßen Katalysators beschrieben.Below is an embodiment of the invention based on schematic representations Described catalyst.

Es zeigen

Fig. 1
in einer Seitenansicht, teilweise in Schnittdarstellung abschnittsweise einen Backofen mit dem Katalysator und
Fig. 2
in stark vergrößertem Maßstab den in der Backofenmuffel befestigten Katalysator.
Show it
Fig. 1
in a side view, partially in section, an oven with the catalyst and sections
Fig. 2
on a greatly enlarged scale the catalyst fixed in the oven muffle.

Ein Backofen 1 weist ein Gehäuse 3 auf, das eine Backofenmuffel 5 umschließt. Diese ist in an sich bekannter Weise mit einem Wärmeisolationsmaterial umkleidet und an ihrer Vorderseite mit einer Backofentür 7 verschließbar. Die Tür besteht aus einem metallischen Türboden 9, in dem eine Sichtscheibe 11 gehaltert ist. Im Frontbereich der Tür 7 ist an dem Türboden 9 eine von der Sichtscheibe beabstandete Frontscheibe 13 befestigt. Zwischen dem Türboden 9 und einem Backofenflansch 15 ist eine im wesentlichen die gesamte Muffelöffnung umziehende Dichtung 17 angeordnet. Bei dem Backofen 1 handelt es sich um einen für den pyrolytischen Selbstreinigungsbetrieb geeigneten, wobei alle Komponenten entsprechend den dabei auftretenden, besonders hohen Betriebtemperaturen ausgelegt sind.An oven 1 has a housing 3 which encloses an oven muffle 5. This is clad in a manner known per se with a thermal insulation material and on its front can be closed with an oven door 7. The door consists of one metallic door floor 9, in which a viewing window 11 is held. In the front area the door 7 is on the door bottom 9 a front window spaced from the viewing window 13 attached. Between the door floor 9 and an oven flange 15 is a essentially 17 sealing the entire muffle opening arranged. At the oven 1 is for pyrolytic self-cleaning operation suitable, whereby all components according to the occurring particularly high operating temperatures are designed.

Von den verschiedenen an sich bekannten Heizelementen des Backofens 1 ist lediglich ein Oberhitze-Heizkörper 19 gezeigt, der unterhalb einer Deckwandung 20 der Backofenmuffel 5 befestigt ist. In dieser ist zudem eine Wrasenöffnung 21 vorgesehen, die aus mehreren Einzelöffnungen 22 besteht (Fig. 2). Über ein trichterförmiges Anschlußstück 23 ist die Wrasenöffnung 21 mit einem Ausblasschacht 25 verbunden, der oberhalb der Tür 7 im Frontbereich des Backofens 1 ins Freie mündet. Im Ausblasschacht 25 ist ein Gebläse 27 zum Saugen von Luft aus der Backofenmuffel 5 angeordnet. Eine Steuervorrichtung 29 zur Steuerung aller Betriebsarten des Backofens 1, wie insbesondere des Backbetriebes und des pyrolytischen Selbstreinigungsbetriebes, ist über mehrere im Frontbereich gehalterte Handhaben 31 möglich.Of the various known heating elements of the oven 1 is only an upper heat radiator 19 shown below the top wall 20 of the Oven muffle 5 is attached. A vapor opening 21 is also provided in this, which consists of several individual openings 22 (Fig. 2). Via a funnel-shaped connector 23, the vapor opening 21 is connected to a blow-out duct 25 which opens into the open above the door 7 in the front area of the oven 1. In the blow-out duct 25, a fan 27 for sucking air from the oven muffle 5 is arranged. A control device 29 for controlling all operating modes of the oven 1, such as in particular the bakery and the pyrolytic self-cleaning company, is possible via several handles 31 held in the front area.

Im Bereich der Wrasenöffnung 21 ist ein Katalysator 35 angeordnet. Der Katalysator weist ein topfförmiges Gehäuse 37 aus einem gut wärmeleitenden Material, insbesondere Aluminium auf, in dessen Boden mehrere Ansaugöffnungen 39 ausgebildet sind. In der Mitte des Bodens des Gehäuses 37 befindet sich eine Befestigungsöffnung 41, durch die eine Befestigungsschraube 43 durch den Katalysator 35 geschoben werden kann und in eine Befestigungsplatte 45 der Deckwandung 20 der Backofenmuffel 5 geschraubt werden kann. Ein abgebogener Umfangsrand 47 des Katalysatorgehäuses 37 wird dabei an die Deckwandung 20 gepreßt. In Strömungsrichtung sind hintereinander drei flache Drahtgewirke angeordnet, die große Benührungsflächen untereinander und zu der Innenwandung des Gehäuses 37 sowie der Deckwandung 20 aufweisen. Das erste Drahtgewirk bildet den ersten Teilkatalysator 49. Der dazu verwendete Draht ist mit Palladium beschichtet und dient insbesondere zum Abbau von Formaldehyd. Das zweite Drahtgewirk ist durch einen unbeschichteten Metalldraht als ein Neutralfilter 51 ausgebildet. Der Strömungswiderstand des Neutralfilters 51 ist geringer als der des ersten Teilkatalysators 49 und eines zweiten Teilkatalysators 53, der strömungstechnisch nach dem Neutralfilter 51 sowie von dem ersten Teilkatalysator 49 räumlich getrennt angeordnet ist. Das Gewirk des zweiten Teilkatalysators 53 ist aus einem mit Platin beschichteten Metalldraht gebildet zum Verbrennen bzw. Neutralisieren weiterer Geruchs- bzw. Schadstoffe. Um den Wirkungsgrad des ersten Teilkatalysators 49 beim Abbau des Formaldehyds nicht zu verschlechtern, wird die zu reinigende Luft bzw. der Wrasen zuerst der katalytischen Reaktion mit Palladium unterzogen und das Reaktionsprodukt dann dem zweiten Teilkatalysator 53 zugeleitet.A catalyst 35 is arranged in the area of the vapor opening 21. The catalyst has a cup-shaped housing 37 made of a good heat-conducting material, in particular Aluminum, in the bottom of which several suction openings 39 are formed are. In the middle of the bottom of the housing 37 there is an attachment opening 41, through which a fastening screw 43 is pushed through the catalyst 35 can be and in a mounting plate 45 of the top wall 20 of the Oven muffle 5 can be screwed. A bent peripheral edge 47 of the Catalyst housing 37 is pressed against the top wall 20. In the direction of flow three flat wire meshes are arranged one behind the other, the large contact surfaces with each other and to the inner wall of the housing 37 and the Have top wall 20. The first wire mesh forms the first partial catalyst 49. The wire used for this is coated with palladium and serves in particular for the reduction of formaldehyde. The second wire mesh is through an uncoated one Metal wire formed as a neutral filter 51. The flow resistance of the neutral filter 51 is less than that of the first partial catalytic converter 49 and a second partial catalytic converter 53, the flow technology after the neutral filter 51 and by the first partial catalytic converter 49 is arranged spatially separated. The knitted fabric of the second Partial catalyst 53 is formed from a platinum-coated metal wire for Burn or neutralize other odors or pollutants. To efficiency of the first partial catalyst 49 during the breakdown of the formaldehyde deteriorate, the air to be cleaned or the vapors become catalytic first Subjected to reaction with palladium and then the reaction product to the second Partial catalyst 53 fed.

Durch die Ausbildung und Befestigung des Katalysators 35 sowie dessen Anordnung in unmittelbarer Nähe des Oberhitze-Heizkörpers 19 erreicht dieser auch bei herkömmlichem Backbetrieb eine ausreichende Betriebstemperatur, um den Abbau des beim Backen, insbesondere durch das Verbrennen von auf die heiße Backofenmuffel 5 spritzenden Fetts oder Öls, entstehenden Formaldehyds zu gewährleisten. Beim pyrolytischen Selbstreinigungsbetrieb erreicht der Katalysator 35 aufgrund der höheren Betriebstemperatur einen höheren Wirkungsgrad beim Abbau des durch das Verbrennen von eingebrannten Fettrückständen entstehenden Formaldehyds.Through the formation and attachment of the catalyst 35 and its arrangement in the immediate vicinity of the top heat radiator 19, this also reaches conventional ones Baking operation a sufficient operating temperature to the degradation of the when baking, especially by burning on the hot oven muffle 5 splashing fat or oil to ensure the formation of formaldehyde. At the pyrolytic self-cleaning operation reaches the catalyst 35 due to the higher Operating temperature a higher efficiency when breaking down by burning formaldehyde formed from burnt-on fat residues.

Claims (10)

Katalysator zur Verwendung in einem Backofen mit einer verschließbaren Backofenmuffel, die von mindestens einem Heizelement beheizbar ist, wobei eine wirksame Oberfläche des Katalysators durch eine Edelmetallschicht gebildet ist, dadurch gekennzeichnet, daß der Katalysator (35) zum Abbau von beim Beheizen der Backofenmuffel (5) freiwerdendem Formaldehyd dient.Catalyst for use in an oven with a closable oven muffle which can be heated by at least one heating element, an effective surface of the catalyst being formed by a noble metal layer, characterized in that the catalyst (35) is used to break down the oven muffle (5) when it is heated. formaldehyde released. Katalysator nach Patentanspruch 1, dadurch gekennzeichnet, daß der Katalysator (35) durch ein Drahtgewirk gebildet ist.Catalyst according to claim 1, characterized in that the catalyst (35) is formed by a wire mesh. Katalysator nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Katalysator (35) in einem durchströmbaren, topfförmigen Gehäuse (37) angeordnet ist.Catalyst according to claim 1 or 2, characterized in that the catalyst (35) is arranged in a flow-through, pot-shaped housing (37). Katalysator nach Anspruch 3, dadurch gekennzeichnet, daß das Gehäuse (37) einen Befestigungsabschnitt aufweist, mit dem der Katalysator an einer Wandung (45) der Backofenmuffel betriebsgemäß abnehmbar befestigt ist.Catalytic converter according to claim 3, characterized in that the housing (37) has a fastening section by means of which the catalytic converter is fastened to a wall (45) of the oven muffle in a manner which is removable in accordance with the operating instructions. Katalysator nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Katalysator (35) mindestens zwei strömungstechnisch hintereinander angeordnete Teilkatalysatoren (49, 53) aufweist.Catalytic converter according to one of the preceding claims, characterized in that the catalytic converter (35) has at least two partial catalytic converters (49, 53) arranged one behind the other in terms of flow technology. Katalysator nach Anspruch 5, dadurch gekennzeichnet, daß die Materialien der Edelmetallschichten der beiden Teilkatalysatoren (49, 53) verschieden sind.Catalyst according to claim 5, characterized in that the materials of the noble metal layers of the two partial catalysts (49, 53) are different. Katalysator nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß zwischen den mindestens zwei Teilkatalysatoren (49, 53) ein unbeschichtetes Neutralfilter (51) angeordnet ist. Catalyst according to claim 5 or 6, characterized in that an uncoated neutral filter (51) is arranged between the at least two partial catalysts (49, 53). Katalysator nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Material der Edelmetallschicht Palladium ist.Catalyst according to one of the preceding claims, characterized in that the material of the noble metal layer is palladium. Katalysator nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Katalysator (35) im Bereich eines Oberhitze-Heizkörpers (19) der Backofenmuffel (5) angeordnet ist.Catalytic converter according to one of the preceding claims, characterized in that the catalytic converter (35) is arranged in the region of an upper heat radiator (19) of the oven muffle (5). Katalysator nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Katalysator in einem Backofen angeordnet ist, der zum pyrolytischen Selbstreinigungsbetrieb erforderliche Betriebsmittel aufweist.Catalytic converter according to one of the preceding claims, characterized in that the catalytic converter is arranged in an oven which has the operating means required for pyrolytic self-cleaning operation.
EP97114675A 1996-09-20 1997-08-25 Baking oven with a catalyst Expired - Lifetime EP0831277B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19638665 1996-09-20
DE19638665A DE19638665A1 (en) 1996-09-20 1996-09-20 Oven with a catalyst

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EP0831277A1 true EP0831277A1 (en) 1998-03-25
EP0831277B1 EP0831277B1 (en) 2003-11-19

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0952404A2 (en) * 1998-04-23 1999-10-27 BSH Bosch und Siemens Hausgeräte GmbH Baking oven with a filter casing
EP1160514A1 (en) * 2000-06-02 2001-12-05 Whirlpool Corporation Pyrolytic self-cleaning oven
WO2002081973A1 (en) * 2001-04-06 2002-10-17 Realist Technology, Inc. Clip-mounted catalyst device
EP1666799A1 (en) * 2004-11-16 2006-06-07 Electrolux Home Products Corporation N.V. Baking oven muffle with catalyst
EP2273202A1 (en) * 2009-07-08 2011-01-12 Electrolux Home Products Corporation N.V. A cooking oven with a catalytic filter system
EP1686322A3 (en) * 2005-01-28 2011-06-08 Electrolux Home Products Corporation N.V. Cooking appliance
US8197568B2 (en) 2006-02-08 2012-06-12 Bsh Bosch Und Siemens Hausgeraete Gmbh Filter element for extractor hood
EP2657615A1 (en) * 2012-04-27 2013-10-30 Miele & Cie. KG Cooking device and catalyst device
WO2016150661A1 (en) * 2015-03-26 2016-09-29 BSH Hausgeräte GmbH Cooking device having an exhaust gas catalyst
DE102022102905A1 (en) 2022-02-08 2023-08-10 Miele & Cie. Kg Cooking device with vapor cleaning and method for operating the cooking device

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19907554A1 (en) * 1999-02-22 2000-08-31 Bsh Bosch Siemens Hausgeraete Catalyst for an oven
DE19912453A1 (en) * 1999-03-19 2000-09-21 Bsh Bosch Siemens Hausgeraete Catalyst assembly for a baking oven that is easily removed from the filter housing
DE10013884C2 (en) * 2000-03-21 2002-05-08 Aeg Hausgeraete Gmbh Cooking oven
DE102005045276A1 (en) * 2005-09-22 2007-04-05 Electrolux Home Products Corporation N.V. Oven, especially kitchen-oven or cooking-oven
DE102013107361A1 (en) * 2013-07-11 2015-01-15 Miele & Cie. Kg Cooking appliance and catalyst device
DE102021212941A1 (en) 2021-11-17 2023-05-17 BSH Hausgeräte GmbH Oven with specific catalyst, process

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DE3346019C2 (en) 1983-12-20 1985-11-07 Bosch-Siemens Hausgeraete Gmbh, 7000 Stuttgart oven
EP0209887A2 (en) 1985-07-23 1987-01-28 E.G.O. Elektro-Geräte Blanc u. Fischer Catalyst for an electric baking oven
EP0220119B1 (en) 1985-10-16 1989-11-02 Compagnie Europeenne Pour L'equipement Menager "Cepem" Pyrolytic self-cleaning oven
DE3929251A1 (en) 1989-09-02 1991-03-07 Scheffer Kludi Armaturen Single lever mixer battery for sanitary ware - consists of control lever, handle, cylindrical cap with cavity and connection
EP0500471A1 (en) 1991-02-21 1992-08-26 Société SCHOLTES Domestic cooking oven
DE4139904A1 (en) 1991-12-04 1993-06-09 Kueppersbusch Ag, 4650 Gelsenkirchen, De Catalytic assembly for fan assisted baking oven - has porous mesh of wire or ceramic coated with catalyst giving free flow of circulating air and large surface area.
DE4142336A1 (en) 1991-12-20 1993-06-24 Bosch Siemens Hausgeraete Vapour duct for domestic oven with catalytic afterburner - which allows burning of combustible vapours and neutralisation of odours at entrance to fume extn. chimney
EP0605291A1 (en) * 1992-12-30 1994-07-06 Produits Berger S.A. Deodorisation device, by catalytic destruction of organic compounds in air to be purified

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB775549A (en) * 1953-09-21 1957-05-29 Harold Russell Suter Improvements in or relating to catalytic fume incineration
US2828404A (en) 1955-07-01 1958-03-25 Gen Motors Corp Domestic appliance
US2846557A (en) 1955-09-09 1958-08-05 Philco Corp Vapor treating means
DE1289281B (en) 1962-12-13 1977-12-15
US3474226A (en) 1967-08-10 1969-10-21 Kelvinator Inc Range oven heating control circuit for pyrolytic oven cleaning
DE1801668A1 (en) 1967-10-13 1969-08-07 United Carr Inc Catalytic burner and method for forming a catalytic unit
DE1817529A1 (en) 1968-01-02 1969-08-14 Gen Electric Door for a combined electric and electronic stove
US3536457A (en) 1968-02-21 1970-10-27 Gen Electric Catalytic oxidation unit for domestic oven exhaust
DE1954744A1 (en) 1969-10-30 1971-05-06 Taste Master Inc Furnace with a housing and an outlet passage leading to the outside
DE2305025A1 (en) 1973-02-02 1974-08-08 Burger Eisenwerke Ag PROCEDURE FOR SELF-CLEANING THE INSIDE OF A FRYING OR OVEN
DE2309873A1 (en) 1973-02-28 1974-08-29 Burger Eisenwerke Ag PROCEDURE FOR SELF-CLEANING THE INSIDE OF A FRYING OR OVEN
DE2640684C2 (en) 1975-09-11 1981-11-26 Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka Roasting or cooking oven
DE2803910A1 (en) 1977-02-11 1978-08-17 Philips Nv COOKING OVENS WITH FORCED HEATING GAS CIRCULATION IN THE MUFFLE AND WITH CATALYTIC FILTER ELEMENTS
CH633305A5 (en) * 1977-04-27 1982-11-30 Enigma Nv Reactive catalyst for the polycondensation of amino resins
DE2811650C2 (en) 1978-03-17 1983-02-03 E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen Catalytic afterburner
DE2817101A1 (en) * 1978-04-19 1979-10-25 Bosch Siemens Hausgeraete Electrically heated cooking oven - has catalytic afterburner in direct contact with heater element
DE7836631U1 (en) 1978-12-11 1979-03-22 Bosch-Siemens Hausgeraete Gmbh, 7000 Stuttgart RETAINER
US4481404A (en) 1982-12-22 1984-11-06 General Electric Company Turn-off control circuit for self-cleaning ovens
DE3346019C2 (en) 1983-12-20 1985-11-07 Bosch-Siemens Hausgeraete Gmbh, 7000 Stuttgart oven
EP0209887A2 (en) 1985-07-23 1987-01-28 E.G.O. Elektro-Geräte Blanc u. Fischer Catalyst for an electric baking oven
EP0220119B1 (en) 1985-10-16 1989-11-02 Compagnie Europeenne Pour L'equipement Menager "Cepem" Pyrolytic self-cleaning oven
DE3929251A1 (en) 1989-09-02 1991-03-07 Scheffer Kludi Armaturen Single lever mixer battery for sanitary ware - consists of control lever, handle, cylindrical cap with cavity and connection
EP0500471A1 (en) 1991-02-21 1992-08-26 Société SCHOLTES Domestic cooking oven
DE4139904A1 (en) 1991-12-04 1993-06-09 Kueppersbusch Ag, 4650 Gelsenkirchen, De Catalytic assembly for fan assisted baking oven - has porous mesh of wire or ceramic coated with catalyst giving free flow of circulating air and large surface area.
DE4142336A1 (en) 1991-12-20 1993-06-24 Bosch Siemens Hausgeraete Vapour duct for domestic oven with catalytic afterburner - which allows burning of combustible vapours and neutralisation of odours at entrance to fume extn. chimney
EP0605291A1 (en) * 1992-12-30 1994-07-06 Produits Berger S.A. Deodorisation device, by catalytic destruction of organic compounds in air to be purified

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0952404A3 (en) * 1998-04-23 1999-11-24 BSH Bosch und Siemens Hausgeräte GmbH Baking oven with a filter casing
EP0952404A2 (en) * 1998-04-23 1999-10-27 BSH Bosch und Siemens Hausgeräte GmbH Baking oven with a filter casing
EP1160514A1 (en) * 2000-06-02 2001-12-05 Whirlpool Corporation Pyrolytic self-cleaning oven
US6437294B2 (en) 2000-06-02 2002-08-20 Whirlpool Corporation Pyrolytic self-cleaning oven
WO2002081973A1 (en) * 2001-04-06 2002-10-17 Realist Technology, Inc. Clip-mounted catalyst device
US7138092B2 (en) 2001-04-06 2006-11-21 Realist Technology Ltd. Clip-mounted catalyst device
US7575726B2 (en) 2001-04-06 2009-08-18 Applied Technology Limited Partnership Snap-fit catalyst device
EP1666799A1 (en) * 2004-11-16 2006-06-07 Electrolux Home Products Corporation N.V. Baking oven muffle with catalyst
EP1686322A3 (en) * 2005-01-28 2011-06-08 Electrolux Home Products Corporation N.V. Cooking appliance
EP2818800A1 (en) * 2005-01-28 2014-12-31 Electrolux Home Products Corporation N.V. Cooking appliance
US8197568B2 (en) 2006-02-08 2012-06-12 Bsh Bosch Und Siemens Hausgeraete Gmbh Filter element for extractor hood
CN102472502A (en) * 2009-07-08 2012-05-23 伊莱克斯家用产品股份有限公司 A cooking oven with a catalytic filter system
WO2011003504A3 (en) * 2009-07-08 2011-03-17 Electrolux Home Products Corporation N.V. A cooking oven with a catalytic filter system
US8847119B2 (en) 2009-07-08 2014-09-30 Electrolux Home Products Corporation N.V. Cooking oven with a catalytic filter system
EP2273202A1 (en) * 2009-07-08 2011-01-12 Electrolux Home Products Corporation N.V. A cooking oven with a catalytic filter system
AU2010268881B2 (en) * 2009-07-08 2015-02-19 Electrolux Home Products Corporation N.V. A cooking oven and catalytic filter system
EP2657615A1 (en) * 2012-04-27 2013-10-30 Miele & Cie. KG Cooking device and catalyst device
WO2016150661A1 (en) * 2015-03-26 2016-09-29 BSH Hausgeräte GmbH Cooking device having an exhaust gas catalyst
DE102022102905A1 (en) 2022-02-08 2023-08-10 Miele & Cie. Kg Cooking device with vapor cleaning and method for operating the cooking device

Also Published As

Publication number Publication date
DE59711022D1 (en) 2003-12-24
DE19638665A1 (en) 1998-03-26
EP0831277B1 (en) 2003-11-19

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