Multi-stage cold accumulation type refrigerator and cooling devi

Details Multi-stage cold accumulation type refrigerator and cooling devi Multi-stage cold accumulation type refrigerator and cooling devi

1992-05-29

1994-03-15

Capossela, Ronald C.

Refrigeration

Storage of solidified or liquified gas

Including cryostat

250352, F25B 1900

Patent

active

052937526

ABSTRACT:
In a multi-stage cold accumulation type refrigerator including a compressor disposed at an ordinary temperature, a helium gas as a common operating fluid to be compressed by the compressor, and one or more expansion chambers and cold accumulators of different temperature levels; a cold accumulating member of the cold accumulators is formed of an alloy or compound containing a rare earth metal, so that the efficiency of the refrigerator can be improved. Further, a heat generation quantity due to sliding resistance of a seal is set to be smaller than a theoretical generated refrigeration quantity to be obtained on the assumption of isothermal expansion in the expansion chambers, so that the refrigerating capacity can be improved. The refrigerator is applied to a cooling device for cooling a superconducting magnet, SQUID, superconducting computer, infrared telescope, etc.

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