[특허]Liquefying and storing a gas

Liquefying and storing a gas 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F25J-001/00 F25B-009/00 A62B-007/06 A62B-007/00
출원번호	US-0130646 (2005-05-16)
등록번호	US-7318327 (2008-01-15)
발명자 / 주소	Dickerson,Brian E. Delve,Steve W. Powell,Douglas R.
출원인 / 주소	Respironics In X, Inc.
대리인 / 주소	Faegre & Benson, LLP
인용정보	피인용 횟수 : 5 인용 특허 : 41

초록 ▼

Apparatus and methods for improving the safety and efficiency and decreasing the cost of producing liquid oxygen with a small-scale use liquefaction device, according to various embodiments of the present invention. In one embodiment, a switch is electrically coupled to a storage dewar pressurizing means, the switch positioned to be activated by a portable dewar upon engagement of portable dewar with storage dewar. Cryocooler and/or cooling fan enter low power mode when dewar liquid level reaches a predetermined level, and to return to a fall power mode when dewar liquid level drops to another predetermined level. A cold finger of the cryocooler extends within the dewar and may prevent overfilling of the dewar. The cold finger has a temperature gradient. As the gas liquefies and fills the dewar, the liquid level rises only to a level on the cold finger at which the temperature exceeds the boiling point of oxygen.

대표청구항 ▼

What is claimed is: 1. A method for reducing power consumption in residential medical gas liquefaction and storage, the method comprising: receiving a feed stream of gas from an oxygen concentrator; liquefying at least part of the feed stream of gas via a cryocooler; containing the liquefied gas in a container; mounting a liquid level sensor within the container, the liquid level sensor operable to detect a liquid level in the container; initiating a low power operational mode of the cryocooler when the liquid level reaches a first predetermined liquid level by reducing a power supply of the cryocooler to a predetermined low power setting; and restoring the power supply of the cryocooler to a predetermined full power setting when the liquid level has dropped below a second predetermined liquid level, wherein the second predetermined liquid level is different from the first predetermined liquid level. 2. The method of claim 1, wherein the first predetermined liquid level is a full liquid level. 3. The method of claim 1, wherein the second predetermined liquid level is a three-fourths frill liquid level. 4. The method of claim 1, wherein initiating the low power operational mode of the cryocooler further comprises: providing a cooling fan operable to remove heat from the cryocooler; reducing a power supply of the cooling fan to another predetermined low power setting; and restoring the power supply of the cooling fan to another predetermined full power setting when the liquid level has dropped to the second predetermined liquid level. 5. The method of claim 1, wherein the cryocooler comprises a cold surface, and wherein initiating the low power operational mode of the cryocooler comprises: selecting a maintenance temperature for the cold surface needed to maintain the liquid level at full; monitoring a temperature of the cold surface; and varying a power supply of the cryocooler to maintain the temperature at the maintenance temperature. 6. The method of claim 1, the method excluding: varying pressure within the container or flow rate of the feed stream of gas during liquefaction. 7. The method of claim 1, wherein the liquid level sensor is a capacitive-type liquid level sensor. 8. A method for reducing power consumption in residential medical gas liquefaction and storage, the method comprising: receiving a feed stream of gas from an oxygen concentrator; providing a cryocooler comprising a condenser, the condenser operable to liquefy at least part of the feed stream of gas for containment in a container; mounting a liquid level sensor within the container, the liquid level sensor operable to detect a liquid level in the container; initiating a low power operational mode of the cryocooler when the liquid level reaches a first predetermined liquid level by reducing a power supply of the cryocooler to a predetermined low power setting; and restoring the power supply of the cryocooler to a predetermined full power setting when the liquid level has dropped below a second predetermined liquid level, wherein the second predetermined liquid level is different from the first predetermined liquid level. 9. The method of claim 8, wherein the first predetermined liquid level is a full liquid level. 10. The method of claim 8, wherein the second predetermined liquid level is a three-fourths frill liquid level. 11. The method of claim 8, wherein initiating the low power operational mode of the cryocooler further comprises: providing a cooling fan operable to remove heat from the cryocooler; reducing a power supply of the cooling fan to another predetermined low power setting; and restoring the power supply of the cooling fan to another predetermined full power setting when the liquid level has dropped to the second predetermined liquid level. 12. The method of claim 8, wherein initiating the low power operational mode of the cryocooler comprises: selecting a maintenance temperature for the condenser needed to maintain the liquid level at full; monitoring a temperature of the condenser; and varying a power supply of the cryocooler to maintain the temperature at the maintenance temperature. 13. The method of claim 8, the method excluding: varying pressure within the container or flow rate of the feed stream of gas during liquefaction. 14. The method of claim 8, wherein the liquid level sensor is a capacitive-type liquid level sensor.

이 특허에 인용된 특허 (41)

Richey ; II Joseph B. ; Goertzen Gerold G., Apparatus and method for forming oxygen-enriched gas and compression thereof for high-pressure mobile storage utilizatio.
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Bragg Kenneth R. (Redondo Beach CA), Apparatus for transferring cryogenic liquid from one dewar to another.
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Hradek Richard W. (Davenport IA), Backup breathing gas supply for an oxygen concentrator system.
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Goddin ; Jr. Clifton S. (Tulsa OK) Turek Edward A. (Tulsa OK) George Boyd A. (Lisle IL), CO₂ removal from high CO₂ content hydrocarbon containing streams.
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Wieland Rolf H. (Norristown PA), Compact integrated gas phase separator and subcooler and process.
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Henry Charles W., Compact small volume liquid oxygen production system.
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Lee Ron C. (Bloomsbury NJ), Cryogen delivery apparatus.
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Leonard Rex D. (Indianapolis IN) Hulstyn Jan (Redondo Beach CA), Cryogenic breathing system.
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Sarcia Domenico S. (Carlisle MA), Cryogenic refrigerator.
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Yani Masayoshi (Sakai JPX) Kawaguchi Etsuji (Otsu JPX) Sugata Michio (Moriyama JPX) Irie Mitsunori (Amagasaki JPX), Device for preventing evaporation of liquefied gas in a liquefied gas reservoir.
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Wellman William H. (Goleta CA) Kunimoto Wallace Y. (Goleta CA), Dewar coldfinger.
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Hannan Alan R. (Cincinnati OH) Nickolin Thomas M. (Cincinnati OH), Digital liquid level sensing apparatus.
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Notaro Frank (Amherst NY), Enhanced condensation heat transfer device and method.
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Kun Leslie C. (Williamsville NY) Ragi Elias G. (Williamsville NY), Enhancement for film condensation apparatus.
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Perkins Warren E. (Port St. Lucie FL) Novak Mark T. (Jensen Beach FL), Fill means for cryogenic flasks.
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Byrd Gary Neal, Integrated high pressure fill port and flow controller for cylinder recharger.
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Arkharov Ivan A.,RUX ; Arkharov Alexey M.,RUX ; Kun Leslie C. ; Tetreault Tommy M., Liquid oxygen production.
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Gardner Thomas W. (737 Damien Way Mississauga ; Ontario CAX L5C 3C3 ), Method and apparatus for producing liquid nitrogen.
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Roman, Ian C.; Baker, Richard W., Method and apparatus for producing oxygen and nitrogen and membrane therefor.
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Hamers Leo J. M. (Eindhoven NLX), Method of liquefying a gas and liquefier for carrying out the method.
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Honkonen Scott C. ; Hill Theodore B. ; Hill Charles C. ; Walker Graham,CAX, Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator.
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Honkonen, Scott C.; Hill, Theodore B.; Hill, Charles C.; Walker, Graham, Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator.
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Honkonen, Scott C.; Hill, Theodore B.; Hill, Charles C.; Walker, Graham, Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator.
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Honkonen, Scott C.; Hill, Theodore B.; Hill, Charles C.; Walker, Graham, Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator.
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Zhou Yuan (Beijing CNX) Wang Junjie (Beijing CNX) Zhu Wenxiu (Beijing CNX) Cai Jinghui (Beijing CNX), Multi-bypass pulse tube refrigerator.
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Rowland Robert O. (Hemet CA), Oxygen concentrator and test apparatus.
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Boissin Jean-Claude,FRX ; Hennebel Vincent,FRX, Portable home oxygen therapy medical equipment.
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McCombs Norman R. (Tonawanda NY), Portable low profile DC oxygen concentrator.
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Appel, William Scot; Winter, David Phillip; Sward, Brian Kenneth; Sugano, Masato; Salter, Edmund; Bixby, James A., Portable oxygen concentration system and method of using the same.
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Hill, Theodore B.; Radtke, Edward A.; Schneider, Robert A.; Bixby, James A., Portable oxygen concentration system and method of using the same.
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Pawlos Robert A. (13185 N. 91st Way Scottsdale AZ 85260), Portable oxygen concentrator.
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Choe Jung S. (Allentown PA) Auvil Steven R. (Macungie PA) Agrawal Rakesh (Allentown PA), Process for separating components of a gas stream.
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Rodewald Newell C. (c/o Frank Wattles ; P.O. Box 1514 Manhattan Beach CA 90266) Sinor Jerry E. (6667 Birdcliff Way Longmont CO 80501), Recirculating breathing apparatus and method.
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Longsworth Ralph C. (Allentown PA), Removable refrigerator for maintaining liquefied gas inventory.
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Gier Harold L., Self contained, cryogenic mixed gas single phase storage and delivery system and method for body cooling, gas condition.
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Burr Peter S. (Munich DEX), Semipermeable membrane gas separation system.
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Yanai Masayoshi (Moriyama JPX) Kawaguchi Etsuji (Moriyama JPX) Sugasaki Yukiya (Moriyama JPX) Kanegae Tsuyoshi (Moriyama JPX) Kondo Bungo (Moriyama JPX), Simplified apparatus for producing liquid nitrogen.
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Hanes Mark, Stirling cycle cryocooler with optimized cold end design.
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Sarcia Domenico S. (114 Sunset Rd. Carlisle MA 01741), System and apparatus for producing and storing liquid gases.
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Gillett John B. (Woodstock NY), Temperature actuated switch for cryo-coolers.
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Hinds Duane E. (Davenport IA) Ankney Richard C. (Davenport IA), Vent tube means for a cryogenic container.
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Shai, Eyal; Berzak, Nir, Combined cryotherapy and brachytherapy device and method.
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Sermet, Eric; Ferre, Eliette; Dodier, Philippe; Mazoyer, Joseph, Device for supplying domiciliary and ambulatory oxygen.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Liquefying and storing a gas 원문보기

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이 특허에 인용된 특허 (41)

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