EP1601447A2 - One-piece manifold for a reverse osmosis system - Google Patents
One-piece manifold for a reverse osmosis systemInfo
- Publication number
- EP1601447A2 EP1601447A2 EP04708123A EP04708123A EP1601447A2 EP 1601447 A2 EP1601447 A2 EP 1601447A2 EP 04708123 A EP04708123 A EP 04708123A EP 04708123 A EP04708123 A EP 04708123A EP 1601447 A2 EP1601447 A2 EP 1601447A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- water
- flow
- manifold
- conduit
- plug
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/10—Accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/08—Apparatus therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
Definitions
- TECHNICAL FIELD This disclosure relates to reverse osmosis systems.
- a typical reverse osmosis water filtering system used in purifying water includes a semi-permeable membrane.
- a pressure is applied to incoming water that forces the incoming water through the membrane.
- the membrane filters impurities from the incoming water leaving purified water on the other side of the membrane called permeate water.
- the impurities left on the membrane are washed away by a portion of the incoming water that does not pass through the membrane .
- the impurities and the water used to wash them away from the membrane are called concentrate water.
- the invention is a one-piece manifold for a reverse osmosis system.
- the manifold includes a filter configured to receive water from a water port and a membrane configured to receive filtered water via a first conduit.
- the membrane is also configured to send permeate water to a reverse osmosis tank.
- the manifold also includes a flow restrictor configured to receive concentrate water from the membrane via a second conduit and to pass the concentrate water to a drain port.
- the one piece manifold is adapted for use in a zero waste reverse osmosis system by passing the concentrate water to a water source port. This aspect may include a feature of having a shut-off valve modified for zero-waste.
- the invention is a flow restrictor defining a restricted flow path for liquid.
- the flow restrictor includes a housing defining an elongated conduit having a tapering conical wall defining a first screw thread and a water-channel thread extending along the tapering con ⁇ cal wall.
- the housing includes a first opening into a distal region of the conduit for receiving a flow of liquid and a second opening into a proximal region of the conduit.
- the flow restrictor also includes an axially elongated plug received into the conduit . A surface of the plug is opposed to the tapering conical wall defining a second screw thread and a tapering surface.
- the second screw thread is disposed in threaded engagement with the first screw thread defined by the conical wall of the housing.
- the opposed surface of the water-channel thread and the tapering surface of the plug are disposed in sealing engagement within the conduit and opposite to define a region for liquid flow.
- the housing with the water-channel thread and the tapering surface of the plug thereby cooperatively define a generally spiral liquid flow path along the water-channel screw thread and the tapering surface, for flow of liquid generally between the first opening and the second port for delivery of liquid from the conduit .
- the invention is the flow restrictor modified for flow of liquid generally between the first opening and a port defined by the flow restrictor for delivery of liquid from the conduit.
- a one-piece manifold provides many components of a standard reverse osmosis system into a single unit. Thus, tubular connections between these components are eliminated thereby providing a system that reduces the number leaks caused by these tubular connections.
- a one-piece manifold can be installed faster than the standard reverse osmosis system because there are less overall components.
- a tapered plug within the flow restrictor can be manufactured using injection molding techniques compared to standard tubular flow restrictor designs.
- modifications can be further made in flow restrictor flow rate at little cost. For example, the flow rate of the restrictor can be controlled by maintaining the same insert length while adjusting the length of the plug.
- FIG. 1 is a diagrammatic plan view of a reverse osmosis water filtering system (Prior art) .
- FIGS. 2-5 are views of a one-piece manifold.
- FIG. 6 is an exploded view of the one-piece manifold.
- FIG. 7 is a cross-sectional view of the one-piece manifold.
- FIG. 8A is a view of one end cap.
- FIG. 8B is a view of another end cap.
- FIG. 9 is a view of a filter bowl.
- FIG. 10 is a view of a membrane housing.
- FIG. 11 is a top view of the housing of the one- piece manifold.
- FIG. 12 is a side view of a flow restrictor plug.
- FIG. 13 is an end view of the flow restrictor plug of FIG. 12 looking from the tip end, with a section taken along the line A-A.
- FIG. 14 is a view of a restrictor housing.
- FIG. 15 is a side view, partially in section, of a flow restrictor housing with a cross-sectional view of threads within the housing.
- FIG. 16 is an enlarged cross-sectional view of an interface between the housing and the plug.
- FIG. 17A is a side view of the flow restrictor housing with a view of the threads within the housing.
- FIG. 17B is an enlarged view of threads taken along line B in FIG. 17A.
- FIG. 17C is an enlarged view of threads taken along line C in FIG. 17A.
- FIG. 17D is an enlarged view of threads taken along line D in FIG. 17C.
- FIG. 18 is a cross-sectional exploded view of a shut-off valve in FIG. 11 taken along the lines E-E.
- FIG. 19 is a cross-sectional view of an embodiment of the shut-off valve for use in a zero-waste reverse osmosis system.
- FIG. 20 is a cross-sectional view of a second embodiment of the shut-off valve for use in a zero-waste reverse osmosis system.
- FIG. 21 is a one-piece manifold for zero-waste reverse osmosis having the shut-off valve of FIG. 20.
- FIG. 22A is a flow restrictor
- FIG. 22B is a plug of the flow restrictor of FIG. 22A.
- FIG. 22C is a housing of the flow restrictor of FIG. 22A.
- a typical prior art reverse osmosis water filtering system 10 may be modified by combining components of system 10 into a single housing, a one-piece manifold 110 (FIG. 2) , to minimize leaks that result from standard tubular connections between the components.
- System 10 includes a filter system 14, a reverse osmosis membrane 18, a reverse osmosis storage tank 22, a flow restrictor 26, a shut-off valve 28, a carbon filter 70 and an air gap faucet 72.
- Filter system 14 includes a sediment filter 30 and carbon filters
- Intake water enters system 10 from a cold water angle stop valve 36, which is connected to a cold water source 84, and is routed through an intake tube 38 to filter system 14.
- Cold water angle stop valve 36 is also connected to a standard faucet 62 through a cold water faucet line 64 providing cold water to the standard faucet.
- Sediment filter 30 removes sediment such as sand and dirt and the like from the intake water.
- Carbon filters 34a and 34b remove chlorine and other contaminants that cause bad color, odor and taste.
- the filtered water is routed to membrane 18 through a water tube 40.
- Membrane 18 includes three ports: an intake port 42, a permeate outlet port 46 and a concentrate outlet port 50.
- Intake port 42 receives filtered intake water from filter system 14 through water tube 40.
- Permeate water is routed from outlet port 46 through permeate tubes 52a and 52b and shut-off valve 28 to tank 22 to be stored under pressure.
- Shut-off valve 28 is automatic and stops the flow of water to membrane 18 and to tank 22.
- air gap faucet 72 is opened by a user, permeate water is forced from tank 22 and through a carbon filter 70 though the faucet 72 for use by a user.
- Concentrate water is routed from outlet port 50 through a waste water tube 78, having a flow restrictor 26, through a drain tube 74 for subsequent disposal down drain 68.
- a one-piece manifold 110 combines a sediment filter, carbon filters, a membrane, a flow restrictor and a shut-off valve into a single unit within a reverse osmosis water filtering system.
- One-piece manifold 110 includes a sediment filter
- a housing or manifold 118 made of a light but solid material (e.g., polypropylene, plastic, glass, talc) .
- Each filter 112, 114a and 114b is located within its own separate filter bowl 121a, 121b and 121c, respectively.
- the one-piece manifold 110 is injected molded.
- the one-piece manifold system 110 uses grooves and conduits (e.g., conduit 171a and conduit 171b) molded in the housing 118, thereby reducing the potential for leaks to occur, e.g. as compared to standard tubing connections.
- Water enters system 110 via an intake port 154 and through shutoff valve 119. The water can pass through sediment filter 112 and/or through each of the carbon filters 114a and 114b, depending on the mold configuration.
- End caps 120a and 120b located on each end of the manifold define grooves (not shown) that can be manufactured in different desired configurations to control the flow of the water between membrane 116 and each of the filters 112, 114a and 114b.
- the reconfigurable end caps alter the order of filtration through the filters 112, 114a and 114b and membrane 116.
- water can flow through sediment filter 112 and one carbon filter and then to membrane 116.
- Other embodiments include routing the water from one of the carbon filters, carbon filter 114a, for example, to membrane 116 and then to the other carbon filter, carbon filter 114b.
- the end cap 120a and membrane vessel cap 123 are plate welded to housing 118 and an end cap 120b, respectively.
- Membrane 116 is positioned within a membrane housing 126 that defines threads that screw onto the membrane vessel cap 123.
- a clip 153 over the membrane housing supports the membrane housing if the membrane housing 126 is used as a handle e.g., to lift the entire unit when the housing is full of water.
- the first path carries the permeate water through the check valve 115 through to a tank port 156.
- the tank port 156 includes a 3/8 inch fitting for connection to a 1/4 inch inside diameter tube that allows the water to flow faster from the tank to the faucet .
- the second path carries water from the tank to a faucet port 152.
- Faucet v port 152 includes a 3/8 inch fitting.
- the third path carries the concentrate water to the flow restrictor 117. Referring next to FIGS. 12-17D, flow restrictor 117 consisting of a plug 124 and a hollow housing or insert 125 constructed to receive plug 124.
- Plug 124 includes a tapered shaft 226 having a length L X/ e.g.
- Screw thread section 227 includes screw threads 231a and 231b separated from one another by a first gap 232a and a second gap 232b.
- Plug 124 is made of a suitable material such as polyethylene and the like so it is softer than the housing material .
- Housing 125 having a length, L 2 , e.g., about 3 inches, includes screw thread 241 and water-channel thread 242.
- Water-channel thread 242 includes a pointed end 244, with a gap 246 between the thread that is a part of a water-flow path.
- Housing 125 is made of a suitable material such as ABS plastic and the like so it is harder than the plug material .
- Plug 124 and housing 125 are interengaged by screw threads 231a and 231b with screw thread 241 initially and then interengaged by screw thread 244 with plug material as the plug is screwed in further, which provide a water tight seal.
- Tapered shaft 226 extends into housing 125 about 1/2 its length, L 2 .
- Flow restrictor 117 is constructed so that the water-channel thread 242 seals around tapered shaft 226 to provide a sealed gap 246 forming a spiral flow path for water along and around the tapered shaft.
- point 244 of water-channel thread 242 slightly penetrates into the opposed surface of the tapered shaft 226 to ensure the tight seal.
- the flow path of the water through flow restrictor 117 starts by passing through an aperture 258 at distal end 260 of the housing 125 and continues into housing 125 until the water comes in contact with the tip region 229 of the tapered plug 124.
- the volume occupied by tapered shaft 226 within housing 125 directs the water into sealed gap 246.
- the water continues to spiral around and along the tapered shaft following the water-channel thread until the water reaches threads 231a, 232b and
- the water is forced through gaps 232a and 232b and into the end cap 120a and through a drain port 158.
- the flow can be restricted in the opposite direction.
- the flow path cross section is designed to restrict water flow using capillary characteristics of water, while at the same time providing a large enough flow cross section to prevent small particles from clogging the flow path.
- plug 125 allows the flow restrictor to be injected molded very easily and inexpensively. For example, after plug 124 has been injected molded, it can be easily released from a mold by rotating the plug a few turns and then drawing the plug from the mold.
- the tooling also allows the flow restrictor to be configured for "stand alone" use as a flow restrictor for other common reverse osmosis water filtration systems .
- Water-channel thread 242 within flow restrictor 117 controls the flow of the water by generating a capillary action around tapered shaft 226 to restrict the flow of water.
- the flow restrictor restricts the water, unlike the traditional winding tube design.
- the length, i.e., pitch, of the thread can be altered to change the degree of flow restriction.
- the length, L x , of tapered shaft 226 can also be modified to control flow rate.
- housing 125 can have the same dimensions, thus saving on manufacturing costs, and the length of plug 125 can be modified to be shorter, thereby to increase the flow rate through the flow restrictor, or longer, thereby to reduce the flow rate through the flow restrictor.
- the one-piece manifold is mountable by screwing screws (not shown) through each of the screw openings 182a and 182b.
- the advantages of the one-piece are not limited to the following.
- the one-piece manifold has an easy to change membrane by simply unscrewing the membrane housing 126.
- the one-piece manifold integrates the check valve for permeate water.
- the one-piece manifold includes high flow water paths from the tank inlet to the faucet outlet.
- the filter bowls 121 have two "slip" type o- rings each 106 of which the top o-ring will also seal in compression, and an end stop (not shown) for the threads so that the bowls cannot be over tightened and will maintain a good seal .
- the one- piece manifold 110 is modified from a standard configuration (a reverse osmosis system that empties concentrate water into a drain) to a zero-waste reverse osmosis system that empties concentrate water into a water source by modifying the shut-off valve 119 .
- a standard configuration a reverse osmosis system that empties concentrate water into a drain
- a zero-waste reverse osmosis system that empties concentrate water into a water source by modifying the shut-off valve 119 .
- shut-off valve 119 stops the flow of intake water based on the pressure in the reverse osmosis tank.
- Shut-off valve 119 is a barrier between an intake water flow path 700 and a permeate water flow path 702.
- the shut-off valve includes a piston 720 and a spacer 721. Intake water flow path 700 is opened or closed by the piston 720 depending on the water pressure in the tank. When the piston 720 is closed, the flow of intake water from the filter 112 is prevented from flowing to the filter 114a.
- a modified shut-off valve 619 includes a piston 730 having a shorter length than piston 720 and replaces piston 720.
- the intake water path 700 will continuously flow from filter 112a to filter 114a independent of the pressure in the reverse osmosis tank due to the piston 730 stopping before it can close the water path 700 to the next filter 114a.
- An external pump of a zero-waste reverse osmosis system (not shown) pumps into the normal inlet port 154.
- a shut-off valve 719 is modified to include a spacer 740, instead of piston 720 and spacer 721, so that spacer 740 is long enough so that the incoming water from filter 112 does not flow to filter 114a regardless of the pressure within the reverse osmosis tank. Instead, the water flows out through a zero-waste port 671 and in through a zero-waste port 672 and continues on to filter 114a.
- the flow restrictor may be modified for systems that do not include one-piece manifolds.
- a flow restrictor 917 may be used in system 10 or in zero-waste reverse osmosis systems such as those described in patent application 10/692,398, "A REVERSE OSMOSIS WATER FILTERING SYSTEM", filed October 23, 2003 and is incorporated in its entirety herein.
- the flow restrictor 917 includes a plug 924 and a housing 925.
- Plug 924 includes a tapered shaft 226 having a length L 3 , e.g., about 1.5 inches, a screw thread section 927, an o-ring 928 and an aperture 930 that leads into a proximal end 962 forming a port 964.
- Screw thread section 927 includes screw threads 931a and 931b separated from one another by a first gap 932a and a second gap (not shown) .
- Plug 924 and housing 925 are interengaged by screw threads 931a and 931b with screw thread 941, which along with o-ring 928 provide a water tight seal. Water flow is similar to flow restrictor 117 except after water passes through the first and second gaps, the water is forced through aperture 930 and out port 964.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US44486403P | 2003-02-04 | 2003-02-04 | |
US444864P | 2003-02-04 | ||
PCT/US2004/003064 WO2004069368A2 (en) | 2003-02-04 | 2004-02-04 | One-piece manifold for a reverse osmosis system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1601447A2 true EP1601447A2 (en) | 2005-12-07 |
EP1601447A4 EP1601447A4 (en) | 2006-03-29 |
Family
ID=32850945
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04708123A Withdrawn EP1601447A4 (en) | 2003-02-04 | 2004-02-04 | One-piece manifold for a reverse osmosis system |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1601447A4 (en) |
CA (1) | CA2514644A1 (en) |
WO (1) | WO2004069368A2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2344792B1 (en) | 2008-10-09 | 2019-12-04 | Watts Water Technologies, Inc. | Shut off valve for a reverse osmosis water filtration system |
CN105239636A (en) * | 2015-11-02 | 2016-01-13 | 张翼鹏 | Water-saving tap realizing double-water-outlet function |
US10780377B2 (en) | 2016-11-30 | 2020-09-22 | Watts Regulator Co. | Sanitizing filter system and method for a residential water filtering system |
IT201900019758A1 (en) * | 2019-10-24 | 2021-04-24 | Filippo Valenti | WATER TREATMENT DEVICE USING REVERSE OSMOSIS |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3542199A (en) * | 1969-07-24 | 1970-11-24 | Donald T Bray | Reverse osmosis water purification unit |
US3840209A (en) * | 1970-07-29 | 1974-10-08 | Anglo Amer Corp South Africa | Flow controlling devices |
AU464273B2 (en) * | 1971-06-23 | 1975-08-21 | Ip Lex Plastic Industries Pty. Ltd | Pressure reducing valve and flow control device |
US4044991A (en) * | 1975-10-06 | 1977-08-30 | Consolidated Controls Corporation | High energy loss fluid flow control device |
US4176683A (en) * | 1976-10-08 | 1979-12-04 | Koninklijke Emballage Industrie Van Leer B. V. | Flow regulator |
EP0438372A2 (en) * | 1990-01-16 | 1991-07-24 | TELEDYNE INDUSTRIES, Inc. d/b/a TELEDYNE WATER PIK | Reverse osmosis system |
US5119860A (en) * | 1990-10-15 | 1992-06-09 | Water Factory Systems | Flow restrictor for water purification systems |
US6110360A (en) * | 1998-09-04 | 2000-08-29 | Hart, Jr.; John E. | Low pressure reverse osmosis water purifying system |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5082557A (en) * | 1990-04-02 | 1992-01-21 | Rainsoft Water Conditioning Co. | Control head for water purifier |
US5122265A (en) * | 1991-07-10 | 1992-06-16 | Hoh Water Technology Corp. | Compact reverse osmosis system with cold water flush |
US5580444A (en) * | 1994-03-14 | 1996-12-03 | Hydrotechnology, Inc. | Water quality monitor for a water purification system |
US5435909A (en) * | 1994-03-14 | 1995-07-25 | Hydrotechnology, Inc. A California Corp. | Water quality monitor for a water purification system |
US6436282B1 (en) * | 2000-08-08 | 2002-08-20 | Plymouth Products, Inc. | Flow control module for RO water treatment system |
-
2004
- 2004-02-04 WO PCT/US2004/003064 patent/WO2004069368A2/en active Application Filing
- 2004-02-04 CA CA002514644A patent/CA2514644A1/en not_active Abandoned
- 2004-02-04 EP EP04708123A patent/EP1601447A4/en not_active Withdrawn
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3542199A (en) * | 1969-07-24 | 1970-11-24 | Donald T Bray | Reverse osmosis water purification unit |
US3840209A (en) * | 1970-07-29 | 1974-10-08 | Anglo Amer Corp South Africa | Flow controlling devices |
AU464273B2 (en) * | 1971-06-23 | 1975-08-21 | Ip Lex Plastic Industries Pty. Ltd | Pressure reducing valve and flow control device |
US4044991A (en) * | 1975-10-06 | 1977-08-30 | Consolidated Controls Corporation | High energy loss fluid flow control device |
US4176683A (en) * | 1976-10-08 | 1979-12-04 | Koninklijke Emballage Industrie Van Leer B. V. | Flow regulator |
EP0438372A2 (en) * | 1990-01-16 | 1991-07-24 | TELEDYNE INDUSTRIES, Inc. d/b/a TELEDYNE WATER PIK | Reverse osmosis system |
US5119860A (en) * | 1990-10-15 | 1992-06-09 | Water Factory Systems | Flow restrictor for water purification systems |
US6110360A (en) * | 1998-09-04 | 2000-08-29 | Hart, Jr.; John E. | Low pressure reverse osmosis water purifying system |
Non-Patent Citations (1)
Title |
---|
See also references of WO2004069368A2 * |
Also Published As
Publication number | Publication date |
---|---|
EP1601447A4 (en) | 2006-03-29 |
CA2514644A1 (en) | 2004-08-19 |
WO2004069368A3 (en) | 2005-03-24 |
WO2004069368A2 (en) | 2004-08-19 |
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Ipc: F16L 55/027 20060101ALI20060207BHEP Ipc: B01D 61/10 20060101ALI20060207BHEP Ipc: F16K 47/06 20060101ALI20060207BHEP Ipc: B01D 61/00 20060101AFI20050404BHEP |
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