Pressure swing absorption system with multi-chamber canister

• US 5,997,617 A
• Filed: 01/30/1998
• Issued: 12/07/1999
• Est. Priority Date: 01/31/1997
• Status: Expired due to Term

• Current Assignee: RIC INVESTMENTS LLC (Koninklijke Philips N.V.), Siemens AG
• Original Assignee: Healthdyne Technologies, Inc. (Koninklijke Philips N.V.)
• Inventors: Murdoch, Robert W., Czabala, Michael P.
• Primary Examiner(s): Spitzer, Robert H.
• Application Number:
  US09/017,109
• Time in Patent Office: 676 Days
• Field of Search: 95/96-105, 95/130, 95/138, 96/108, 96/109, 96/113-115, 96/126-130, 96/133, 96/144, 96/146, 96/143
• US Class Current: 96/130
• CPC Class Codes: B01D 2253/108 Zeolites
• CPC Class Codes: B01D 2256/12 Oxygen
• CPC Class Codes: B01D 2257/102 Nitrogen
• CPC Class Codes: B01D 2259/402 using two beds
• CPC Class Codes: B01D 2259/4533 for medical purposes
• CPC Class Codes: B01D 53/0446 Means for feeding or distributing gases
• CPC Class Codes: B01D 53/047 Pressure swing adsorption
• CPC Class Codes: B01D 53/053 with storage or buffer vessel

Abstract

A multi-chamber canister for a pressure swing absorption system within a general housing assembly. The chambers include a first molecular sieve chamber 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 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 is disposed within the housing for receiving air from the ambient environment and for communicating air to either first or second molecular sieve chambers.

Claims

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.

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 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.

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.

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.

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.