[특허]Precooling system for joule-thomson probe

[미국특허] Precooling system for joule-thomson probe 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F25B-019/02
출원번호	US-0726770 (1996-10-07)
발명자 / 주소	Dobak III John D. Brown Terry L. Ghaerzadeh Kambiz Yu Xiaoyu
출원인 / 주소	CryoGen, Inc.
대리인 / 주소	Spinks
인용정보	피인용 횟수 : 82 인용 특허 : 25

초록 ▼

A miniature mixed gas refrigeration system and method of operation are disclosed. An optimum gas mixture is formulated from a group of component fluids, according to calculated thermodynamic properties of a group of candidate fluid mixtures. The gas mixture is pressurized by a compressor to a pressure less than 420 psia, for safety reasons. The compressed gas mixture is passed through a primary heat exchanger, and then through a primary-to-secondary heat exchanger, to precool the gas mixture. The secondary side of the primary/secondary heat exchanger is cooled by a secondary Joule-Thomson refrigeration system. Properly sized flow restrictions in the primary side of the primary/secondary heat exchanger can solidify and trap liquid contaminants that may be in the gas mixture. The gas mixture exiting the primary outlet of the primary/secondary heat exchanger passes to a primary Joule-Thomson expansion element where the high pressure gas is expanded isenthalpically to a lower temperature at least as low as 183K. This low temperature gas cools a heat transfer element mounted in the outer wall of the catheter, to cool an external object. Return gas flows back through the primary heat exchanger to further pre-cool the incoming high pressure gas mixture. A distal primary heat exchanger can be added between the primary/secondary heat exchanger and the primary Joule-Thomson expansion element.

대표청구항 ▼

[ We claim:] [1.] A method for cooling a distal cold tip of a probe, comprising:providing a closed primary loop, said primary loop including at least one primary heat exchanger anda primary expansion element distal of said primary heat exchanger;providing a closed secondary loop, said secondary loop including a primary/secondary heat exchangerand a secondary expansion element distal of said primary/secondary heat exchanger;compressing a refrigerant in said secondary loop;cooling said refrigerant in said primary/secondary heat exchanger;isenthalpically expanding said refrigerant to a lower temperature with said secondary expansion element;warming said expanded refrigerant in said primary/secondary heat exchanger;compressing a gas mixture in said primary loop with said primary compressor;cooling said compressed gas mixture in said primary heat exchanger;cooling said compressed gas mixture in said primary/secondary heat exchanger;isenthalpically expanding said gas mixture with said primary expansion element to still further cool said gas mixture;and applying said expanded gas mixture to the cold tip, to lower the temperature of the cold tip.

이 특허에 인용된 특허 (25) 인용/피인용 타임라인 분석

Milder Fredric L. (Brookline MA) Hed A Ze\ev (Nashua NH), Catheter for ice mapping and ablation.
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Friedman Peter L. (Rowley MA) Wang Paul (Brookline MA) Cravalho Ernest G. (Wellesley Hills MA), Cryoablation catheter and method of performing cryoablation.
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Milder Fredric L. (Brookline MA), Cryogenic catheter.
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Hersey Devin W. (Kent WA), Cryogenic cooling system with precooling stage.
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Hersey Devin W. (Kent WA), Cryogenic cooling system with precooling stage.
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Milder Fredric L. (Brookline MA), Cryogenic mapping and ablation catheter.
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Sakitani Katsumi (Sakai JPX) Kang Yoon M. (Sakai JPX) Shinozaki Shinichiro (Sakai JPX) Taneya Shoichi (Sakai JPX) Miura Kazuo (Sakai JPX) Ogura Tadashi (Sakai JPX) Noguchi Satoshi (Sakai JPX), Cryogenic refrigerator.
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Dobak ; III John D. (6273 Caminito Del Oeste San Diego CA 92111), Cryosurgical instrument.
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Rzasa Ronald P. (Fairfield CT) Wallach Ronald M. (Westport CT), Cryosurgical instrument.
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Savage Steven D. (Brooklyn Center MN) Brucker Gregory G. (Minneapolis MN), Laser catheter with monitor and dissolvable tip.
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Mitchiner Robert K. (Boulder CO) Russell Wayne A. (Chelmsford MA), Method and means for controlling the freeze zone of a cryosurgical probe.
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Jones Jack A. (Los Angeles CA) Petrick S. Walter (La Canada CA) Bard Steven (Northridge CA), Multicomponent gas sorption Joule-Thomson refrigeration.
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Bard Steven (Northridge CA) Jones Jack A. (Los Angeles CA), Three-stage sorption type cryogenic refrigeration systems and methods employing heat regeneration.
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Hed Aharon Z. (12 Wagon Trail Dr. Nashua NH 03062), Ultrasonic freeze ablation catheters and probes.
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[미국특허] Precooling system for joule-thomson probe 원문보기

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[미국특허] Precooling system for joule-thomson probe 원문보기

초록 ▼

대표청구항 ▼

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전체(0) 논문(0) 특허(0) 보고서(0)

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이 특허에 인용된 특허 (25) 인용/피인용 타임라인 분석

이 특허를 인용한 특허 (82) 인용/피인용 타임라인 분석

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