CA2278093C - Pressure swing absorption system with multi-chamber canister - Google Patents
Pressure swing absorption system with multi-chamber canister Download PDFInfo
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- CA2278093C CA2278093C CA002278093A CA2278093A CA2278093C CA 2278093 C CA2278093 C CA 2278093C CA 002278093 A CA002278093 A CA 002278093A CA 2278093 A CA2278093 A CA 2278093A CA 2278093 C CA2278093 C CA 2278093C
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- Prior art keywords
- chamber
- molecular sieve
- sieve
- chambers
- port
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- Expired - Fee Related
Links
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 52
- 239000002808 molecular sieve Substances 0.000 claims abstract description 143
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims abstract description 143
- 239000012530 fluid Substances 0.000 claims description 41
- 239000002699 waste material Substances 0.000 claims description 14
- 238000010926 purge Methods 0.000 claims description 10
- 238000013022 venting Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims 9
- 230000001276 controlling effect Effects 0.000 claims 2
- 239000003570 air Substances 0.000 description 46
- 239000007789 gas Substances 0.000 description 34
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 32
- 239000001301 oxygen Substances 0.000 description 32
- 229910052760 oxygen Inorganic materials 0.000 description 32
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 238000001125 extrusion Methods 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 230000009977 dual effect Effects 0.000 description 4
- 108091006146 Channels Proteins 0.000 description 2
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 101150087654 chrnd gene Proteins 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000009428 plumbing Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
- B01D53/0446—Means for feeding or distributing gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/047—Pressure swing adsorption
- B01D53/053—Pressure swing adsorption with storage or buffer vessel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—Silica or silicates
- B01D2253/108—Zeolites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2256/00—Main component in the product gas stream after treatment
- B01D2256/12—Oxygen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/10—Single element gases other than halogens
- B01D2257/102—Nitrogen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/402—Further details for adsorption processes and devices using two beds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/45—Gas separation or purification devices adapted for specific applications
- B01D2259/4533—Gas separation or purification devices adapted for specific applications for medical purposes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/047—Pressure swing adsorption
Abstract
A multi-chamber canister (12) for a pressure swing absorption system within a general housing assembly. The chambers include a first molecular sieve chamber (16) for receiving a first molecular sieve for separating air from the ambient environment into a concentrated gas and at least a second molecular sieve chamber (18) disposed within the housing assembly for receiving a second molecular sieve for separating air from the ambient environment into a concentrated gas component. Furthermore, a supply chamber (14) is disposed within the housing for receiving air from the ambient environment and for communicating air to either first or second molecular sieve chambers (16, 18).
Description
PRESSURE SWING ABSORPTION SYSTEM WITH
MULTI-CHAMBER CANISTER
This invention relates to a pressure swing absorption chamber, and more particularly to an oxygen concentrator system having a mufti-chamber canister for receiving compressed air from a compressor and directing the air through a series of chambers integral within a single assembly for producing concentrated oxygen in a pressure swing absorption system.
BACKGROUND OF THE INVENTION
to Pressure swing absorption systems are used for separating a desired gas from a gas mixture such as air. A typical pressure swing absorption system is an oxygen concentrator which separates the oxygen from air for subsequent inhalation by a patient. An oxygen concentrator, or similar pressure swing absorption system, typically includes a plurality of molecular sieve beds for separating the gas into an oxygen and a nitrogen fraction whereby the oxygen is i5 subsequently provided to a patient whip the nitrogen is retained in the sieve bed and subsequently purged. Typically, oxygen concentrators include several components such as an air compressor, two three-way air valves, multiple canisters each housing a separate molecular sieve and a product reservoir tattle. Such structures require extensive valuing and plumbing which effects the etlicicncy and costs of these systems.
2o United States Patent No. 5,578,115 discloses a container for a pressure swing oxygen concentrator for housing a plurality of molecular sieves. An extrusion iS cut to a desired length and end caps are secured to the extrusion with screws and resilient seals. A
third cavity serves as an accumulator for receiving and storing corlcmtrated oxygen. While such structure is suflxciant ~CT/US98101986 for its intended purpose, a more improved design may be had for incorporating the operations of an oxygen concentrator within a single housing configuration.
Accordingly, it is an object of the present invention to provide a pressure swing absorption system incorporating a mufti-chamber canister assembly for improving the efficiency of the system;
Furthermore, it is an object of the present invention to provide a pressure swing absorption system incorporating a mufti-chamber canister assembly for improving the cost of the system;
It is also an object of the present invention to provide a mufti-chamber canister assembly to for a pressure swing absorption system wherein the temperature difference between molecular sieves is minimal due to their location within the canister;
Also, it is an object of the present invention to provide a mufti-chamber canister assembly for a pressure swing absorption system wherein multiple operations of the pressure swing absorption system may be incorporated within a single housing assembly.
is SIrfMMARY OF THE INVENTION
The above objectives are accomplished according to the invention by providing a multi-chamber canister for a pressure swing absorption system which includes at least three chambers.
The canister includes a housing of a general length. A first molecular sieve chamber is disposed 2o within the housing for receiving a first molecular sieve for separating air from the ambient environment into a concentrated gas component. At least a second molecular sieve-chamber is also disposed within the housing for receiving a second molecular sieve far separating air from the ambient environment into a concentrated gas component. A supply chamber is disposed within the housing for receiving air l:rom the ambient environment and for communicating the air to either the first: or second molecular sieve chamber.
In one embodiment, there is provided a pressure swing absorption system for separating air from the ambient environment into a concentrated gas component, said system comprising: a housin;; of a general ler~gtlr; a first molecular sieve chamber disposed within said housing for receiving a first moles~ular sieve for separating air from the ambient environment into a concentrated gas component; at least a second molecular sieve chamber disposed within said housing for receiving a second molecular sieve for separating air from the ambient environment into a concer7trated gas component; and a supply chamber disposed within said housing for receiving air from the ambient environment and for communicating said air to said first and second molecular sieve chamber'.
In one embodiment, there is provided a pressure swing absorption system for separating air from the ambient environment into a concentrated gas component, said systern comprising: a housing of a general length; a first molecular sieve chamber disposed within said housing for receiving a first molecular sieve f:or separating air from the: ambient environment into a concentrated gas component; at h°ast a second molecular sieve chamber disposed within said housing for recei~ ing a second molecular sieve for separating air from the ambient environment into a concentrated gas component; a supply chamber disposed within said housing for receiving air from the ambient environment acrd for communicating said air to said first and second molecular sieve chambers; a product chamber for receiving a concentrated gas component from either said first or second molecular sieve charri~ers for subsequent delivery to a patient; an exhaust chamber disposed within said housing for receiving waste product gas from said kirst and second molecular sieve chambers and for venting the waste product gas to the amrbient environment; a first valve control system for regulating fluid flow between said suploly chamber, said exhaust chamber and said first and second molecular sieve° chamber; and a second valve control system for regulating fluid flow between <.~aid first and second molecular sieve chambers and said product chamber.
MULTI-CHAMBER CANISTER
This invention relates to a pressure swing absorption chamber, and more particularly to an oxygen concentrator system having a mufti-chamber canister for receiving compressed air from a compressor and directing the air through a series of chambers integral within a single assembly for producing concentrated oxygen in a pressure swing absorption system.
BACKGROUND OF THE INVENTION
to Pressure swing absorption systems are used for separating a desired gas from a gas mixture such as air. A typical pressure swing absorption system is an oxygen concentrator which separates the oxygen from air for subsequent inhalation by a patient. An oxygen concentrator, or similar pressure swing absorption system, typically includes a plurality of molecular sieve beds for separating the gas into an oxygen and a nitrogen fraction whereby the oxygen is i5 subsequently provided to a patient whip the nitrogen is retained in the sieve bed and subsequently purged. Typically, oxygen concentrators include several components such as an air compressor, two three-way air valves, multiple canisters each housing a separate molecular sieve and a product reservoir tattle. Such structures require extensive valuing and plumbing which effects the etlicicncy and costs of these systems.
2o United States Patent No. 5,578,115 discloses a container for a pressure swing oxygen concentrator for housing a plurality of molecular sieves. An extrusion iS cut to a desired length and end caps are secured to the extrusion with screws and resilient seals. A
third cavity serves as an accumulator for receiving and storing corlcmtrated oxygen. While such structure is suflxciant ~CT/US98101986 for its intended purpose, a more improved design may be had for incorporating the operations of an oxygen concentrator within a single housing configuration.
Accordingly, it is an object of the present invention to provide a pressure swing absorption system incorporating a mufti-chamber canister assembly for improving the efficiency of the system;
Furthermore, it is an object of the present invention to provide a pressure swing absorption system incorporating a mufti-chamber canister assembly for improving the cost of the system;
It is also an object of the present invention to provide a mufti-chamber canister assembly to for a pressure swing absorption system wherein the temperature difference between molecular sieves is minimal due to their location within the canister;
Also, it is an object of the present invention to provide a mufti-chamber canister assembly for a pressure swing absorption system wherein multiple operations of the pressure swing absorption system may be incorporated within a single housing assembly.
is SIrfMMARY OF THE INVENTION
The above objectives are accomplished according to the invention by providing a multi-chamber canister for a pressure swing absorption system which includes at least three chambers.
The canister includes a housing of a general length. A first molecular sieve chamber is disposed 2o within the housing for receiving a first molecular sieve for separating air from the ambient environment into a concentrated gas component. At least a second molecular sieve-chamber is also disposed within the housing for receiving a second molecular sieve far separating air from the ambient environment into a concentrated gas component. A supply chamber is disposed within the housing for receiving air l:rom the ambient environment and for communicating the air to either the first: or second molecular sieve chamber.
In one embodiment, there is provided a pressure swing absorption system for separating air from the ambient environment into a concentrated gas component, said system comprising: a housin;; of a general ler~gtlr; a first molecular sieve chamber disposed within said housing for receiving a first moles~ular sieve for separating air from the ambient environment into a concentrated gas component; at least a second molecular sieve chamber disposed within said housing for receiving a second molecular sieve for separating air from the ambient environment into a concer7trated gas component; and a supply chamber disposed within said housing for receiving air from the ambient environment and for communicating said air to said first and second molecular sieve chamber'.
In one embodiment, there is provided a pressure swing absorption system for separating air from the ambient environment into a concentrated gas component, said systern comprising: a housing of a general length; a first molecular sieve chamber disposed within said housing for receiving a first molecular sieve f:or separating air from the: ambient environment into a concentrated gas component; at h°ast a second molecular sieve chamber disposed within said housing for recei~ ing a second molecular sieve for separating air from the ambient environment into a concentrated gas component; a supply chamber disposed within said housing for receiving air from the ambient environment acrd for communicating said air to said first and second molecular sieve chambers; a product chamber for receiving a concentrated gas component from either said first or second molecular sieve charri~ers for subsequent delivery to a patient; an exhaust chamber disposed within said housing for receiving waste product gas from said kirst and second molecular sieve chambers and for venting the waste product gas to the amrbient environment; a first valve control system for regulating fluid flow between said suploly chamber, said exhaust chamber and said first and second molecular sieve° chamber; and a second valve control system for regulating fluid flow between <.~aid first and second molecular sieve chambers and said product chamber.
DESCRIPTION OF THE DRAWINGS
The construction designed to carry out the invention will hereinafter be described, together with other featiues thereof.
The invention will be morn readily understood from a reading of the following ;; specification and by reference to the accompanying drawings forming a part thereof, wherein an example of the invcntian is shown and wherein:
F1G. 1 is a perspective view of a pressers swing absorption system according to the present tnvenuon;
FIG. 2 is an exploded view of a pressure swing absorption system according to the to presentinvention;
FIG. 3 is a perspective view of a multi-chamber caaistes for use in a pressure swing absorption system according to the present invention;
FIG. 4a is a perspective view of a top cover for cotnmttnicating fluid flow within a multi-chamber canister for use in a pressure swing absorption system according to the prat is invention;
FIG. 4b is a perspective view of a top cover for cotamunicating fluid gow within a ttmlti-chamber canister for use in a pressure swing absorption system wording to the presort iaveation;
-3 a-FiG. 5 is a perspective view of a bottom cover for communicating fluid flow within a mufti-chamber canister for use in a pressure swing absorption system according to the present invention;
FIG 6 is a perspective view of a valuing system for communicating fluid flow within a ,; mufti-chamber canister for use in a pressure swing absorption system according to the present invention.
DESCRB~TION OF THE PREFERRED i=~l~or>rwF~ r As shown in FIGS 1 and 3, pressure swing absorption system 8 includes compressor 10 so having an inlet for receiving air from the ambient environment. Compressor 10 compresses the air and provides the pressurized air to mufti-chamber canister 12. In the preferred embodiment, pressure swing absorption system 8 fra~tionalizes oxygen from the air in an oxygen concentration system. The operation of an oxygen concentration system is described in U.S.
Patent No 5,183,483 entitled "Pneumatic Circuit Control for Pt~esstwe Swing Adsorption t 5 Systems" .
Mufti-chamber canister 12 includes multiple chambers for producing concentrated oxygen from pressurized air. Canister 12 is preferably a cylindrical elongated housing providing sttfftcient volume for the respective chambexs. In the preferred embodiment, canister I2 is a single extrusion, but may cot>Sist of separate housings xntetconatoctai for forming a caaist~
zo assembly. Supply chamber 14 receives the pressurized. air from the compressor for delivery to the molecular sieves. First molecular sieve chamber 16 is located adjacent to second molecular sieve chamber 18 which house zeolite or other suitable material for fractionating air into oxygen and a waste product gas such as nitrogen. First molecular sieve chamber 16 and second a.
molecular sieve chamber 18 have abutting walls 20 and 22 to maintain a constant temperature between the chambers which reduces the swing in oxygen concentration between the two chambers. Product chamber 24 is in fluid communication with both first molecular sieve chamber 16 and second molecular sieve chamber 18 for receiving and storing concentrated oxygen produced by the respective sieves. Exhaust chamber 26 is in fluid communication with both first and second molecular sieve chambers 16 and I8 and receives the waste product gas which has been purged from a respective molecular sieve. Each of these chambers extend along the length of mufti-chamber canister 12.
An exploded view of the mufti-chamber canister assembly is shown in FIG 2. Top to portion 28 of mufti-chamber canister 12 carries a top cover 30. Top cover 30 encloses the top portion of the respective chambers of mufti-chamber canister 12 and includes a plurality of orifices enabling fluid flow between the respective chambers which will be described in more detail hereinafter. Valve 32 directs the communication of fluid flow between the orifices of top cover 30 and the respective chambers of mufti-chamber canister 12. Top cover seal 34 seals the 15 connection between top cover 30 and mufti-chamber canister 12. Pressure regulator 36 regulates the pressure of concentrated oxygen delivered from product chamber 24 to a patient. The bottom portion 38 of mufti-chamber canister 12 carries bottom cover 40. Bottom cover 40 encloses the bottom of the respective chambers of mufti-chamber canister 12 and provides for fluid communication between the respective chambers as will be described in more detail hereinafter.
20 Bottom cover seal 42 seals the connection between bottom cover 40 and mufti-chamber canister 12.
Top cover 30 is shown in more detail in FIGs 4a and 4b and includes valve seat 44 . Top cover 30 includes first molecular sieve cover plenum 46 and second molecular sieve cover plenum 48. Disposed within first molecular sieve cover.plcatun 4b at a point which aligns with valve seat 44 is first molecular sieve inlet port 50 which will provide fluid communication with first molecular sieve 16. Disposed within second molecular sieve cover plenum 48 at a point which aligns with valve seat 44 is second molecular sieve inlet port 52 which will provide fluid communication with second molecular sieve 18. Top cover 30 also includes exhaust port 54 which communicates with exhaust chamber 26 to permit venting of waste product gas from the system. Furthermore, disposed within top cover 30 is supply port 56 which communicates with supply chamber 14. Springs 58 are carried by top cover 30 for maintaining the molecular sieve aeolite material in place within the respective molecular sieve chambers.
to Valve seat 44 includes various ports which correspond with the aforementioned ports of top cover 30 for communicating fluid flow throughout the pressure swing absorption cycle.
Valve seat first molecular sieve port 60 communicates with first molecular sieve port 50, valve seat second molecular sieve port 62 communicates with second molecular sieve port 52, valve seat exhaust port 64 communicates with exhaust port 54 and valve seat supply port 66 t 5 communicates with supply port 56. Valve 32 is carried by valve seat 44 for directing fluid flow between the respective ports during operation of the pressure swing absorption system.
FIG. 5 illustrates bottom cover 4Q which controls flow between the respective molecular slaves 16 and 18 during the purging cycle and also controls the delivery of product gas fiom the respxtive molecular sieves to product chamber 24. Bottom cover 40 inchtdes first molecular 2o sieve bottom cover plcnum 67, second molecular sieve bottom cover plenum 68, supply chamber bottom plenum 70 , exhaust chamber outlet port 72, and pr~uat tank bottom ple~um 74.
Bottom cover 40 includes cavities such that the respective chambers are defined by mutti-chamber canister 12 in combination with bottom cover 40. For example, bottom cover 40 -b-includes first molecular sieve chamber bottom wall 76, socond molecular sieve chamber bottom wall 78, product tank bottom wall 80 and supply chamber bottom wall 82. The cambinatioa of the bottom walls and plenums enclose the respxtJive chambers of multi-chamber canister 12.
The delivery of product gas to product chamber 24 from the respective molecular sieves s is controlled in part by delivery system 84. Delivery system 84 includes first gas outlet port 86 defined within first malxuIar sieve chamber bottom wall 76 and second gas outlet port 88 defined within second molecular sieve chamber bottom wall 78. Fiat gas outlet port 86 communicates with first delivery channel 90 and terminates at first internal gas outlet port 92 which is located within product chamber 24 for delivering concentrated oxygen from first to molecular sieve chamber I6 to product chamber 24. Second gas outlet port 88 communicates with saeond delivery channel 94 and terminates at second internal outlet port 96 for delivering concentrated oxygen from second molecular sieve chamber 18 to product chamber 24. Dual check valve 98 overlies both first and second internal gas outlet ports 86 and 96. Both first and second internal gas outlet ports 86 and 95 will communicate with product chamber 24 when 15 open. In the prefectrd embodiment, first and second internal gas outlet ports 86 and 96 and dual check valve 98 are located within supply chamber 24. Check valve retainer 100 maintains pressure on dual check valve 98 to close off first and second internal gas outlet ports 86 and 96 preventing a backflow of product gas to a respective molecular sieve ensuring that the product gas is delivered to product 24.
2o During the purging cycle of each molecular sieve, purge control orifice 102 communicates ptrsattrized gas from a molecular sieve which is undergoing a c6atg~ing cycie to the other moiecttlar sieve. Purge control orifice 102 extends tl~-ough the abutting walls of first and second molecular sieve chambers lb and 18. In the preferred embodiment, mufti-chamber canister 12 is a single extrusion such that first and second molecular sieve chambers 16 and 18 share common wall 104, however, mufti-chamber canister 12 may be comprised of an assembly of separate chambers integrated to form a mufti-chamber assembly. In this situation, common wall 104 will consist of separate molecular sieve chamber walls which abut.
This design assists in maintaining an even temperature between the molecular sieves which enables the concentration of oxygen produced by each respective sieve to be approximately equal in concentration level.
Compressed air inlet 106 receives compressed air from a compressor and communicates the gas to supply chamber 14 through supply port 108 bypassing second molecular sieve t o chamber 18. As shown in FIG. 1 since the compressed air is received at the bottom of multi-chamber canister assembly 12, the compressed air must travel along the length of the canister to reach valve 32 for subsequent presentation to either first or second molecular sieve chambers 16 or 18. By requiring the compressed air to travel along the length of canister 12, the external wall of canister 12 functions as a heat exchanger for cooling the compressed air.
Generally, air after compression is at a higher temperature than ambient. The effectiveness of the molecular sieves is increased with air at a cooler temperature. Accordingly, the cooling of the compressed air prior to entry into the molecular sieves enhances the efficiency of the pressure swing absorption system.
As shown in Figure 4a, top cover 30 includes supply chamber top cavity 110 which 2o encloses the top portion of supply chamber 24 of mufti-chamber canister 12.
Product supply port 112 communicates the concentrated gas to a patient through pressure regulator 36. Product chamber pressure sensor tap 114 enables the mounting of a pressure sensor for determining the pressure within product chamber 24.
-8_ FIG 6 illustrates valve 32. Valve 32 is carried by valve seat 44 for cotrununicating the flow of fluid throughout the pressure swing absorption cycle. Valve inlet part 116 opens and closes for communicating compressed air &am supply chamber 14 to molecular sieve chambers 16 and 1 &. First molecular sieve valve outlet 118 and second molxular sieve valve outlet 120 open and close to permit compressed air to enter the respective molecular sieves during operation of the pressure swing absorption cycle. Valve exhaust outlet 122 communicates with exhaust chamber 26 permitting purged gas to exit the respective molecular sieves and enter exhaust chamber 26 for venting through exhaust port 72. Valve 32 is controlled by a microprocessor and solenoids, not shown, for directing communication of fluid throughout the system.
When assembled as shown in ~lti 1, top and bottom covers 30 and 40 in combination with mufti-chamber canister 12 define a fully integrated system wherein a supply chamber, product chamber, exhaust chamber and first and s~ond molecular sieve chambers arc enelosod within a general profile defined by mufti-chamber canister 12. As previously mentioned, multi-chamber canister may be a single extrusion or a plurality of extrusions wherein the chambers are is configured to be enclosed within separate extrusions and wherein the plurality of extrusions are assembled to define a configuration similar to that shown in FIG 1.
In operation, air enters compressor 10 and is compressed resulting in the compressed air having a tanperature higher than the ambient air. The compressed air afters mufti-chamber canister 12 through bottom cover 40 eztd is ptzsented to supply 14. The compressed air is passed through supply chamber 14 to valve 32 for delivery to a respective molecular sieve chamber 1G or 18. Since valve 32 is located on opposite ends of mufti-chamber canister 12, the com~sed air travels along the length of mufti-chamber canister 12 enabling mufti-chamber canistxr 12 to act as a heat exchanger for cooling the compressed air prior to delivery to a WO 98/33579 ~CTIL1S98/01986 respective molecular sieve. Valve 32 opens a respective molecular sieve chamber enabling the compressed air to enter the molecular sieve chamber. The molecular sieve material filters the nitrogen molecules from the air producing a concentration of oxygen. The concentrated oxygen in turn pressurizes a respective outlet port 86 or 88 which forces check valve retainer 100 to bend, opening up dual check valve 98 enabling the concentrated oxygen to enter product chamber 24, while simultaneously maintaining the other respective outlet port closed preventing a backflow of concentrated oxygen to flow into the other respective molecular sieve. The concentrated oxygen passes along the length of mufti-chamber canister and exists through pressure regulator 36. Once again, the passage of the concentrated oxygen along the length of t o mufti-chamber canister 12 enables mufti-chamber canister 12 to act as a heat exchanger for cooling the concentrated oxygen prior to delivery to a patient.
Approximately one third of the concentrated oxygen enters product chamber 24 allowing the remaining two thirds to enter the other molecular sieve chamber through purge control orifice 102. Valve 32 simultaneously opens exhaust port 54 enabling nitrogen to be purged from the respective molecular sieve chamber and pass through exhaust port 54 in top cover 30 and enter into exhaust chamber 26 for subsequent venting at exhaust chamber outlet port 72 located in bottom cover 40. The cycle of charging and purging of the molecular sieves is further detailed in U.S. Patent No.S, 183, 483.
Thus, accordingly, a more improved design for a pressure swing absorption system may 2o be had with a mufti-chamber canister enclosing within a single profile a plurality of chambers utilized throughout the pressure swing absorption system. By locating the components of a pressure swing absorption system within a single mufti-chamber canister, even temperature may be maintained throughout the system ensuring an improved consistency in the concentration of oxygen as well as eliminating pressure drops which invariably result from valuing and tubing commonly found in oxygen concentration systems with separate components.
The construction designed to carry out the invention will hereinafter be described, together with other featiues thereof.
The invention will be morn readily understood from a reading of the following ;; specification and by reference to the accompanying drawings forming a part thereof, wherein an example of the invcntian is shown and wherein:
F1G. 1 is a perspective view of a pressers swing absorption system according to the present tnvenuon;
FIG. 2 is an exploded view of a pressure swing absorption system according to the to presentinvention;
FIG. 3 is a perspective view of a multi-chamber caaistes for use in a pressure swing absorption system according to the present invention;
FIG. 4a is a perspective view of a top cover for cotnmttnicating fluid flow within a multi-chamber canister for use in a pressure swing absorption system according to the prat is invention;
FIG. 4b is a perspective view of a top cover for cotamunicating fluid gow within a ttmlti-chamber canister for use in a pressure swing absorption system wording to the presort iaveation;
-3 a-FiG. 5 is a perspective view of a bottom cover for communicating fluid flow within a mufti-chamber canister for use in a pressure swing absorption system according to the present invention;
FIG 6 is a perspective view of a valuing system for communicating fluid flow within a ,; mufti-chamber canister for use in a pressure swing absorption system according to the present invention.
DESCRB~TION OF THE PREFERRED i=~l~or>rwF~ r As shown in FIGS 1 and 3, pressure swing absorption system 8 includes compressor 10 so having an inlet for receiving air from the ambient environment. Compressor 10 compresses the air and provides the pressurized air to mufti-chamber canister 12. In the preferred embodiment, pressure swing absorption system 8 fra~tionalizes oxygen from the air in an oxygen concentration system. The operation of an oxygen concentration system is described in U.S.
Patent No 5,183,483 entitled "Pneumatic Circuit Control for Pt~esstwe Swing Adsorption t 5 Systems" .
Mufti-chamber canister 12 includes multiple chambers for producing concentrated oxygen from pressurized air. Canister 12 is preferably a cylindrical elongated housing providing sttfftcient volume for the respective chambexs. In the preferred embodiment, canister I2 is a single extrusion, but may cot>Sist of separate housings xntetconatoctai for forming a caaist~
zo assembly. Supply chamber 14 receives the pressurized. air from the compressor for delivery to the molecular sieves. First molecular sieve chamber 16 is located adjacent to second molecular sieve chamber 18 which house zeolite or other suitable material for fractionating air into oxygen and a waste product gas such as nitrogen. First molecular sieve chamber 16 and second a.
molecular sieve chamber 18 have abutting walls 20 and 22 to maintain a constant temperature between the chambers which reduces the swing in oxygen concentration between the two chambers. Product chamber 24 is in fluid communication with both first molecular sieve chamber 16 and second molecular sieve chamber 18 for receiving and storing concentrated oxygen produced by the respective sieves. Exhaust chamber 26 is in fluid communication with both first and second molecular sieve chambers 16 and I8 and receives the waste product gas which has been purged from a respective molecular sieve. Each of these chambers extend along the length of mufti-chamber canister 12.
An exploded view of the mufti-chamber canister assembly is shown in FIG 2. Top to portion 28 of mufti-chamber canister 12 carries a top cover 30. Top cover 30 encloses the top portion of the respective chambers of mufti-chamber canister 12 and includes a plurality of orifices enabling fluid flow between the respective chambers which will be described in more detail hereinafter. Valve 32 directs the communication of fluid flow between the orifices of top cover 30 and the respective chambers of mufti-chamber canister 12. Top cover seal 34 seals the 15 connection between top cover 30 and mufti-chamber canister 12. Pressure regulator 36 regulates the pressure of concentrated oxygen delivered from product chamber 24 to a patient. The bottom portion 38 of mufti-chamber canister 12 carries bottom cover 40. Bottom cover 40 encloses the bottom of the respective chambers of mufti-chamber canister 12 and provides for fluid communication between the respective chambers as will be described in more detail hereinafter.
20 Bottom cover seal 42 seals the connection between bottom cover 40 and mufti-chamber canister 12.
Top cover 30 is shown in more detail in FIGs 4a and 4b and includes valve seat 44 . Top cover 30 includes first molecular sieve cover plenum 46 and second molecular sieve cover plenum 48. Disposed within first molecular sieve cover.plcatun 4b at a point which aligns with valve seat 44 is first molecular sieve inlet port 50 which will provide fluid communication with first molecular sieve 16. Disposed within second molecular sieve cover plenum 48 at a point which aligns with valve seat 44 is second molecular sieve inlet port 52 which will provide fluid communication with second molecular sieve 18. Top cover 30 also includes exhaust port 54 which communicates with exhaust chamber 26 to permit venting of waste product gas from the system. Furthermore, disposed within top cover 30 is supply port 56 which communicates with supply chamber 14. Springs 58 are carried by top cover 30 for maintaining the molecular sieve aeolite material in place within the respective molecular sieve chambers.
to Valve seat 44 includes various ports which correspond with the aforementioned ports of top cover 30 for communicating fluid flow throughout the pressure swing absorption cycle.
Valve seat first molecular sieve port 60 communicates with first molecular sieve port 50, valve seat second molecular sieve port 62 communicates with second molecular sieve port 52, valve seat exhaust port 64 communicates with exhaust port 54 and valve seat supply port 66 t 5 communicates with supply port 56. Valve 32 is carried by valve seat 44 for directing fluid flow between the respective ports during operation of the pressure swing absorption system.
FIG. 5 illustrates bottom cover 4Q which controls flow between the respective molecular slaves 16 and 18 during the purging cycle and also controls the delivery of product gas fiom the respxtive molecular sieves to product chamber 24. Bottom cover 40 inchtdes first molecular 2o sieve bottom cover plcnum 67, second molecular sieve bottom cover plenum 68, supply chamber bottom plenum 70 , exhaust chamber outlet port 72, and pr~uat tank bottom ple~um 74.
Bottom cover 40 includes cavities such that the respective chambers are defined by mutti-chamber canister 12 in combination with bottom cover 40. For example, bottom cover 40 -b-includes first molecular sieve chamber bottom wall 76, socond molecular sieve chamber bottom wall 78, product tank bottom wall 80 and supply chamber bottom wall 82. The cambinatioa of the bottom walls and plenums enclose the respxtJive chambers of multi-chamber canister 12.
The delivery of product gas to product chamber 24 from the respective molecular sieves s is controlled in part by delivery system 84. Delivery system 84 includes first gas outlet port 86 defined within first malxuIar sieve chamber bottom wall 76 and second gas outlet port 88 defined within second molecular sieve chamber bottom wall 78. Fiat gas outlet port 86 communicates with first delivery channel 90 and terminates at first internal gas outlet port 92 which is located within product chamber 24 for delivering concentrated oxygen from first to molecular sieve chamber I6 to product chamber 24. Second gas outlet port 88 communicates with saeond delivery channel 94 and terminates at second internal outlet port 96 for delivering concentrated oxygen from second molecular sieve chamber 18 to product chamber 24. Dual check valve 98 overlies both first and second internal gas outlet ports 86 and 96. Both first and second internal gas outlet ports 86 and 95 will communicate with product chamber 24 when 15 open. In the prefectrd embodiment, first and second internal gas outlet ports 86 and 96 and dual check valve 98 are located within supply chamber 24. Check valve retainer 100 maintains pressure on dual check valve 98 to close off first and second internal gas outlet ports 86 and 96 preventing a backflow of product gas to a respective molecular sieve ensuring that the product gas is delivered to product 24.
2o During the purging cycle of each molecular sieve, purge control orifice 102 communicates ptrsattrized gas from a molecular sieve which is undergoing a c6atg~ing cycie to the other moiecttlar sieve. Purge control orifice 102 extends tl~-ough the abutting walls of first and second molecular sieve chambers lb and 18. In the preferred embodiment, mufti-chamber canister 12 is a single extrusion such that first and second molecular sieve chambers 16 and 18 share common wall 104, however, mufti-chamber canister 12 may be comprised of an assembly of separate chambers integrated to form a mufti-chamber assembly. In this situation, common wall 104 will consist of separate molecular sieve chamber walls which abut.
This design assists in maintaining an even temperature between the molecular sieves which enables the concentration of oxygen produced by each respective sieve to be approximately equal in concentration level.
Compressed air inlet 106 receives compressed air from a compressor and communicates the gas to supply chamber 14 through supply port 108 bypassing second molecular sieve t o chamber 18. As shown in FIG. 1 since the compressed air is received at the bottom of multi-chamber canister assembly 12, the compressed air must travel along the length of the canister to reach valve 32 for subsequent presentation to either first or second molecular sieve chambers 16 or 18. By requiring the compressed air to travel along the length of canister 12, the external wall of canister 12 functions as a heat exchanger for cooling the compressed air.
Generally, air after compression is at a higher temperature than ambient. The effectiveness of the molecular sieves is increased with air at a cooler temperature. Accordingly, the cooling of the compressed air prior to entry into the molecular sieves enhances the efficiency of the pressure swing absorption system.
As shown in Figure 4a, top cover 30 includes supply chamber top cavity 110 which 2o encloses the top portion of supply chamber 24 of mufti-chamber canister 12.
Product supply port 112 communicates the concentrated gas to a patient through pressure regulator 36. Product chamber pressure sensor tap 114 enables the mounting of a pressure sensor for determining the pressure within product chamber 24.
-8_ FIG 6 illustrates valve 32. Valve 32 is carried by valve seat 44 for cotrununicating the flow of fluid throughout the pressure swing absorption cycle. Valve inlet part 116 opens and closes for communicating compressed air &am supply chamber 14 to molecular sieve chambers 16 and 1 &. First molecular sieve valve outlet 118 and second molxular sieve valve outlet 120 open and close to permit compressed air to enter the respective molecular sieves during operation of the pressure swing absorption cycle. Valve exhaust outlet 122 communicates with exhaust chamber 26 permitting purged gas to exit the respective molecular sieves and enter exhaust chamber 26 for venting through exhaust port 72. Valve 32 is controlled by a microprocessor and solenoids, not shown, for directing communication of fluid throughout the system.
When assembled as shown in ~lti 1, top and bottom covers 30 and 40 in combination with mufti-chamber canister 12 define a fully integrated system wherein a supply chamber, product chamber, exhaust chamber and first and s~ond molecular sieve chambers arc enelosod within a general profile defined by mufti-chamber canister 12. As previously mentioned, multi-chamber canister may be a single extrusion or a plurality of extrusions wherein the chambers are is configured to be enclosed within separate extrusions and wherein the plurality of extrusions are assembled to define a configuration similar to that shown in FIG 1.
In operation, air enters compressor 10 and is compressed resulting in the compressed air having a tanperature higher than the ambient air. The compressed air afters mufti-chamber canister 12 through bottom cover 40 eztd is ptzsented to supply 14. The compressed air is passed through supply chamber 14 to valve 32 for delivery to a respective molecular sieve chamber 1G or 18. Since valve 32 is located on opposite ends of mufti-chamber canister 12, the com~sed air travels along the length of mufti-chamber canister 12 enabling mufti-chamber canistxr 12 to act as a heat exchanger for cooling the compressed air prior to delivery to a WO 98/33579 ~CTIL1S98/01986 respective molecular sieve. Valve 32 opens a respective molecular sieve chamber enabling the compressed air to enter the molecular sieve chamber. The molecular sieve material filters the nitrogen molecules from the air producing a concentration of oxygen. The concentrated oxygen in turn pressurizes a respective outlet port 86 or 88 which forces check valve retainer 100 to bend, opening up dual check valve 98 enabling the concentrated oxygen to enter product chamber 24, while simultaneously maintaining the other respective outlet port closed preventing a backflow of concentrated oxygen to flow into the other respective molecular sieve. The concentrated oxygen passes along the length of mufti-chamber canister and exists through pressure regulator 36. Once again, the passage of the concentrated oxygen along the length of t o mufti-chamber canister 12 enables mufti-chamber canister 12 to act as a heat exchanger for cooling the concentrated oxygen prior to delivery to a patient.
Approximately one third of the concentrated oxygen enters product chamber 24 allowing the remaining two thirds to enter the other molecular sieve chamber through purge control orifice 102. Valve 32 simultaneously opens exhaust port 54 enabling nitrogen to be purged from the respective molecular sieve chamber and pass through exhaust port 54 in top cover 30 and enter into exhaust chamber 26 for subsequent venting at exhaust chamber outlet port 72 located in bottom cover 40. The cycle of charging and purging of the molecular sieves is further detailed in U.S. Patent No.S, 183, 483.
Thus, accordingly, a more improved design for a pressure swing absorption system may 2o be had with a mufti-chamber canister enclosing within a single profile a plurality of chambers utilized throughout the pressure swing absorption system. By locating the components of a pressure swing absorption system within a single mufti-chamber canister, even temperature may be maintained throughout the system ensuring an improved consistency in the concentration of oxygen as well as eliminating pressure drops which invariably result from valuing and tubing commonly found in oxygen concentration systems with separate components.
Claims (30)
1. A pressure swing absorption system for separating air from the ambient environment into a concentrated gas component, said system comprising:
a housing of a general length including a housing wall;
a first molecular sieve chamber defined within said housing for receiving a first molecular sieve for separating air from the ambient environment into a concentrated gas component, said first molecular sieve chamber defined by a first molecular sieve chamber partition, wherein said first molecular sieve chamber partition and said housing wall define said first molecular sieve chamber;
at least a second molecular sieve chamber defined within said housing for receiving a second molecular sieve for separating air from the ambient environment into a concentrated gas components; said second molecular sieve chamber defined by a second molecular sieve chamber partition, wherein said second molecular sieve chamber partition and said housing wall define said second molecular sieve chamber; and a supply chamber defined within said housing for receiving air from the ambient environment and for communicating said air to said first and said second molecular sieve chambers, said supply chamber defined by a supply chamber partition, wherein said supply chamber partition and said housing wall define said supply chamber, and wherein said supply chamber extends along a general length of said housing, said supply chamber including an air inlet for receiving air, said air inlet disposed a general distance apart from where said supply chamber fluidly communicates with either one of said first and said second molecular sieve chambers enabling said housing to act as a heat exchanger for cooling said air received from said air inlet.
a housing of a general length including a housing wall;
a first molecular sieve chamber defined within said housing for receiving a first molecular sieve for separating air from the ambient environment into a concentrated gas component, said first molecular sieve chamber defined by a first molecular sieve chamber partition, wherein said first molecular sieve chamber partition and said housing wall define said first molecular sieve chamber;
at least a second molecular sieve chamber defined within said housing for receiving a second molecular sieve for separating air from the ambient environment into a concentrated gas components; said second molecular sieve chamber defined by a second molecular sieve chamber partition, wherein said second molecular sieve chamber partition and said housing wall define said second molecular sieve chamber; and a supply chamber defined within said housing for receiving air from the ambient environment and for communicating said air to said first and said second molecular sieve chambers, said supply chamber defined by a supply chamber partition, wherein said supply chamber partition and said housing wall define said supply chamber, and wherein said supply chamber extends along a general length of said housing, said supply chamber including an air inlet for receiving air, said air inlet disposed a general distance apart from where said supply chamber fluidly communicates with either one of said first and said second molecular sieve chambers enabling said housing to act as a heat exchanger for cooling said air received from said air inlet.
2. The pressure swing absorption system of claim 1, wherein said housing includes an exhaust chamber defined by at least one exhaust partition, said exhaust chamber in fluid communication with said first and second molecular sieve chambers for exhausting waste product gas produced from said molecular sieves contained within each respective molecular sieve chambers.
3. The pressure swing absorption system of claim 2, further comprising an exhaust port for venting waste product gas from said exhaust chamber to the ambient environment.
4. The pressure swing absorption system of claim 1, wherein said first and said second molecular sieve chambers abut one another for maintaining an approximately even temperature within said first and second molecular sieve chambers.
5. The pressure swing absorption system of claim 4, further comprising a purge control orifice defined within an outer wall of said first and second molecular sieve chambers enabling gas from one of said first and said second molecular sieve chambers to flow to a remaining other of said first and said second molecular sieve chambers to assist in purging waste product gas from one of said first and said second molecular sieve chamber receiving said gas.
6. The pressure swing absorption system of claim 1, further comprising a product chamber partially defined by at least one product chamber partition within said housing for receiving a concentrated gas component from either one of said first and said second molecular sieve chambers for subsequent delivery to a patient.
7. The pressure swing absorption system of claim 6, including a bottom cover for enclosing said first and said second molecular sieve chambers.
8. The pressure swing absorption system of claim 7, wherein said bottom cover includes a cavity defining a receptacle for said supply chamber to receive air.
9. The pressure swing absorption system of claim 7, wherein said bottom cover defines an exhaust outlet in fluid communication with said exhaust chamber for venting waste product gas received from said first and said second molecular sieve chambers to the ambient environment.
10. The pressure swing absorption system of claim 7, wherein said bottom cover includes a first concentrated gas outlet port for communicating concentrated gas from said first molecular sieve to said product chamber.
11. The pressure swing absorption system of claim 10, wherein said bottom cover includes a second concentrated gas outlet port for communicating concentrated gas from said second molecular sieve chamber to said product chamber.
12. The pressure swing absorption system of claim 6, further comprising:
a top cover for enclosing said first and said second molecular sieve chambers, said supply chamber and said product chamber, wherein said top cover includes a first molecular sieve port, a second molecular sieve port, and a supply chamber port enabling fluid communication between said supply chamber and said first and second molecular sieve chambers, a valve for controlling a fluid communication of gas between said supply chamber and said first and said second molecular sieve chambers, said top cover including a valve seat for carrying said valve, said valve seat including:
a valve seat supply chamber port in fluid communication with said top cover supply chamber port, a valve seat first molecular sieve port in fluid communication with said top cover first molecular sieve port, a valve seat second molecular sieve port in fluid communication with said top cover second molecular sieve port for enabling said valve to communicate fluid between said supply chamber and said first and second molecular sieve chambers.
a top cover for enclosing said first and said second molecular sieve chambers, said supply chamber and said product chamber, wherein said top cover includes a first molecular sieve port, a second molecular sieve port, and a supply chamber port enabling fluid communication between said supply chamber and said first and second molecular sieve chambers, a valve for controlling a fluid communication of gas between said supply chamber and said first and said second molecular sieve chambers, said top cover including a valve seat for carrying said valve, said valve seat including:
a valve seat supply chamber port in fluid communication with said top cover supply chamber port, a valve seat first molecular sieve port in fluid communication with said top cover first molecular sieve port, a valve seat second molecular sieve port in fluid communication with said top cover second molecular sieve port for enabling said valve to communicate fluid between said supply chamber and said first and second molecular sieve chambers.
13. The pressure swing absorption system of claim 1, wherein said housing is defined by at least two separate housing components that join to form a housing assembly.
14. A pressure swing absorption system for separating air from the ambient environment into a concentrated gas component, said system comprising:
a multi-chamber canister of a general length having an outer wall and a plurality of partitions defined within an interior, said multi-chamber canister including:
a first molecular sieve chamber for receiving a first molecular sieve for separating air from the ambient environment into a concentrated gas component, at least a second molecular sieve chamber for receiving a second molecular sieve for separating air from the ambient environment into a concentrated gas component, a supply chamber for receiving air from the ambient environment and for communicating said air to said first and said second molecular sieve chambers, a product chamber for receiving a concentrated gas component from either one of said first and second molecular sieve chambers for subsequent delivery to a patient, and an exhaust chamber for receiving waste product gas from said first and said second molecular sieve chambers and for venting said waste product gas to the ambient environment;
a first valve control system for regulating fluid flow between said supply chamber, said exhaust chamber, and said first and said second molecular sieve chambers; and a second valve control system for regulating fluid flow between said first and said second molecular sieve chambers and said product chamber.
a multi-chamber canister of a general length having an outer wall and a plurality of partitions defined within an interior, said multi-chamber canister including:
a first molecular sieve chamber for receiving a first molecular sieve for separating air from the ambient environment into a concentrated gas component, at least a second molecular sieve chamber for receiving a second molecular sieve for separating air from the ambient environment into a concentrated gas component, a supply chamber for receiving air from the ambient environment and for communicating said air to said first and said second molecular sieve chambers, a product chamber for receiving a concentrated gas component from either one of said first and second molecular sieve chambers for subsequent delivery to a patient, and an exhaust chamber for receiving waste product gas from said first and said second molecular sieve chambers and for venting said waste product gas to the ambient environment;
a first valve control system for regulating fluid flow between said supply chamber, said exhaust chamber, and said first and said second molecular sieve chambers; and a second valve control system for regulating fluid flow between said first and said second molecular sieve chambers and said product chamber.
15. The pressure swing absorption system of claim 14, wherein said supply chamber extends along a general length of said multi-chamber canister, said supply chamber including an air inlet for receiving air, said air inlet disposed a general distance apart from where said supply chamber fluidly communicates with either one of said first and said second molecular sieve chambers enabling said multi-chamber canister to act as a heat exchanger for cooling said air received from said air inlet.
16. The pressure swing absorption system of claim 14, including a top cover for enclosing said first and said second molecular sieve chambers, said supply chamber and said product chamber.
17. The pressure swing absorption system of claim 16, wherein said top cover includes a first molecular sieve port, a second molecular sieve port, and a supply chamber port enabling fluid communication between said supply chamber and said first and said second molecular sieve chambers.
18. The pressure swing absorption system of claim 17, wherein said top cover includes a valve seat for carrying said first valve control system, said valve seat including:
a valve seat supply chamber port in fluid communication with said top cover supply chamber port, a valve seat first molecular sieve port in fluid communication with said top cover first molecular sieve port, a valve seat second molecular sieve port in fluid communication with said top cover second molecular sieve port for enabling said first valve control system to communicate fluid between said supply chamber and said first and said second molecular sieve chambers.
a valve seat supply chamber port in fluid communication with said top cover supply chamber port, a valve seat first molecular sieve port in fluid communication with said top cover first molecular sieve port, a valve seat second molecular sieve port in fluid communication with said top cover second molecular sieve port for enabling said first valve control system to communicate fluid between said supply chamber and said first and said second molecular sieve chambers.
19. The pressure swing absorption system of claim 14, including a bottom cover including said second valve control system for enclosing said first and second molecular sieve chambers and for directing fluid flow from either of said first and said second molecular sieve chambers to said product chamber.
20. A sieve bed assembly for separating air from the ambient environment into a concentrated gas component, the system comprising:
a first housing component having a first sieve chamber defined therein, the first sieve chamber being adapted to contain a material for separating air from the ambient environment into a concentrated gas component;
a second housing component having a second sieve chamber defined therein, the second sieve chamber being adapted to contain a material for separating air from the ambient environment into a concentrated gas component; and a supply housing component having a supply chamber defined therein for receiving air from the ambient environment and for communicating the air to the first and the second sieve chambers, wherein the supply housing component is thermally coupled to at least one of the first housing component and the second housing component, and wherein the supply chamber includes an air inlet for receiving air that is disposed a distance apart from where the supply chamber fluidly communicates with either one of the first and the second sieve chambers enabling the supply housing component and at least one of an associated first or second housing component to act as a heat exchanger for cooling the air received at the air inlet.
a first housing component having a first sieve chamber defined therein, the first sieve chamber being adapted to contain a material for separating air from the ambient environment into a concentrated gas component;
a second housing component having a second sieve chamber defined therein, the second sieve chamber being adapted to contain a material for separating air from the ambient environment into a concentrated gas component; and a supply housing component having a supply chamber defined therein for receiving air from the ambient environment and for communicating the air to the first and the second sieve chambers, wherein the supply housing component is thermally coupled to at least one of the first housing component and the second housing component, and wherein the supply chamber includes an air inlet for receiving air that is disposed a distance apart from where the supply chamber fluidly communicates with either one of the first and the second sieve chambers enabling the supply housing component and at least one of an associated first or second housing component to act as a heat exchanger for cooling the air received at the air inlet.
21. The sieve bed assembly of claim 20, further comprising an exhaust housing component having an exhaust chamber defined therein, wherein the exhaust chamber is in fluid communication with the first and the second sieve chambers for exhausting waste product gas produced from the sieve material contained within each respective first and second sieve chamber.
22. The sieve bed assembly of claim 21, further comprising a bottom cover enclosing the first sieve chamber, the second sieve chamber, and the exhaust chamber, and wherein the bottom cover defines an exhaust outlet in fluid communication with the exhaust chamber for venting waste product gas received from the first and the second sieve chambers to the ambient environment.
23. The sieve bed assembly of claim 20, wherein the first and the second housing components are thermally coupled to one another for maintaining ah approximately even temperature within the first and the second sieve chambers.
24. The sieve bed assembly of claim 20, further comprising a purge control orifice defined in a wall of the first and the second housing components enabling gas from one of the first and the second sieve chambers to flow to a remaining other of the first and the second sieve chambers to assist in purging waste product gas from one of the first and the second sieve chamber receiving the gas.
25. The sieve bed assembly of claim 20, further comprising a bottom cover enclosing the first and the second sieve chambers.
26. The sieve bed assembly of claim 25, wherein the bottom cover includes a cavity defining a receptacle for the supply chamber to receive air.
27. The sieve bed assembly of claim 20, further comprising a product housing component having a product chamber defined therein, the product chamber being adapted to receive a concentrated gas component from either of the first and the second sieve chambers for subsequent delivery to a patient.
28. The sieve bed assembly of claim 27, further comprising a bottom cover enclosing the first sieve chamber, the second sieve chamber, and the product chamber, and wherein the bottom cover includes a first concentrated gas outlet port for communicating concentrated gas from the first sieve chamber to the product chamber.
29. The sieve bed assembly of claim 28, wherein the bottom cover includes a second concentrated gas outlet port for communicating concentrated gas from the second sieve chamber to the product chamber.
30. The sieve bed assembly of claim 27, further comprising:
(1) a top cover enclosing the first sieve chamber, the second sieve chambers, the supply chamber, and the product chamber, wherein the top cover includes a first sieve port, a second sieve port, and a supply chamber port enabling fluid communication between the supply chamber and the first and the second sieve chambers;
(2) a valve for controlling a fluid communication of gas between the supply chamber and the first and the second molecular sieve chambers, the top cover including a valve seat for carrying the valve, the valve seat including:
(a) a valve seat supply chamber port in fluid communication with the top cover supply chamber port, (b) a valve seat first sieve port in fluid communication with the top cover first sieve port, (c) a valve seat second sieve port in fluid communication with the top cover second sieve port for enabling the valve to communicate fluid between the supply chamber and the first and second molecular sieve chambers.
(1) a top cover enclosing the first sieve chamber, the second sieve chambers, the supply chamber, and the product chamber, wherein the top cover includes a first sieve port, a second sieve port, and a supply chamber port enabling fluid communication between the supply chamber and the first and the second sieve chambers;
(2) a valve for controlling a fluid communication of gas between the supply chamber and the first and the second molecular sieve chambers, the top cover including a valve seat for carrying the valve, the valve seat including:
(a) a valve seat supply chamber port in fluid communication with the top cover supply chamber port, (b) a valve seat first sieve port in fluid communication with the top cover first sieve port, (c) a valve seat second sieve port in fluid communication with the top cover second sieve port for enabling the valve to communicate fluid between the supply chamber and the first and second molecular sieve chambers.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US3683597P | 1997-01-31 | 1997-01-31 | |
| US60/036,835 | 1997-01-31 | ||
| PCT/US1998/001986 WO1998033579A1 (en) | 1997-01-31 | 1998-01-30 | Pressure swing absorption system with multi-chamber canister |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2278093A1 CA2278093A1 (en) | 1998-08-06 |
| CA2278093C true CA2278093C (en) | 2006-03-21 |
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ID=21890917
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002278093A Expired - Fee Related CA2278093C (en) | 1997-01-31 | 1998-01-30 | Pressure swing absorption system with multi-chamber canister |
Country Status (7)
| Country | Link |
|---|---|
| US (2) | US5997617A (en) |
| EP (1) | EP0968043B1 (en) |
| AU (1) | AU6054598A (en) |
| CA (1) | CA2278093C (en) |
| DE (2) | DE602004010465T2 (en) |
| ES (2) | ES2230672T3 (en) |
| WO (1) | WO1998033579A1 (en) |
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- 1998-01-30 CA CA002278093A patent/CA2278093C/en not_active Expired - Fee Related
- 1998-01-30 DE DE602004010465T patent/DE602004010465T2/en not_active Expired - Lifetime
- 1998-01-30 ES ES04101560T patent/ES2297337T3/en not_active Expired - Lifetime
- 1998-01-30 AU AU60545/98A patent/AU6054598A/en not_active Abandoned
- 1998-01-30 DE DE69826991T patent/DE69826991T2/en not_active Expired - Lifetime
- 1998-01-30 WO PCT/US1998/001986 patent/WO1998033579A1/en active IP Right Grant
- 1998-01-30 EP EP98903900A patent/EP0968043B1/en not_active Expired - Lifetime
- 1998-01-30 US US09/017,109 patent/US5997617A/en not_active Expired - Lifetime
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1999
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| US5997617A (en) | 1999-12-07 |
| EP0968043B1 (en) | 2004-10-13 |
| US6190441B1 (en) | 2001-02-20 |
| AU6054598A (en) | 1998-08-25 |
| EP0968043A4 (en) | 2000-09-13 |
| EP0968043A1 (en) | 2000-01-05 |
| ES2297337T3 (en) | 2008-05-01 |
| WO1998033579A1 (en) | 1998-08-06 |
| CA2278093A1 (en) | 1998-08-06 |
| DE602004010465D1 (en) | 2008-01-17 |
| ES2230672T3 (en) | 2005-05-01 |
| DE69826991T2 (en) | 2006-01-05 |
| DE602004010465T2 (en) | 2008-03-13 |
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