Refrigeration – Storage of solidified or liquified gas – Spraying of cryogen
Patent
1998-05-07
2000-06-06
Capossela, Ronald
Refrigeration
Storage of solidified or liquified gas
Spraying of cryogen
F17C 702
Patent
active
060704152
ABSTRACT:
A miniature refrigeration system and method of operation. A primary refrigerant is pressurized by a compressor to a relatively low pressure, for safety reasons. The compressed primary refrigerant is passed through a primary-to-secondary heat exchanger, to precool the gas mixture. The secondary side of the primary-to-secondary heat exchanger is cooled by a secondary refrigeration system. The primary refrigerant exiting the primary outlet of the primary-to-secondary heat exchanger passes to a primary Joule-Thomson expansion element where the high pressure gas is expanded to a lower temperature. This low temperature gas cools a heat transfer element mounted in the outer wall of the catheter or cryoprobe, to cool surrounding tissue. Return gas can flow back through a distal primary-to-primary heat exchanger to further cool the incoming high pressure gas mixture. A proximal primary-to-primary heat exchanger can be added between the primary-to-secondary heat exchanger and the primary compressor.
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Brown Terry L.
Dobak III John D.
Ghaerzadeh Kambiz
Yu Xiaoyu
Capossela Ronald
CryoGen, Inc.
Spinks Gerald W.
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