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

1994-08-23

1995-09-05

Capossela, Ronald C.

Refrigeration

Gas compression, heat regeneration and expansion, e.g.,...

60520, F25B 900

Patent

active

054470331

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.

REFERENCES:
patent: 4475346 (1984-10-01), Young et al.
patent: 5009072 (1991-04-01), Nagao

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