Cryogenic refrigerator

Details Cryogenic refrigerator Cryogenic refrigerator

1987-05-18

1989-06-20

Capossela, Ronald C.

Refrigeration

Cryogenic treatment of gas or gas mixture

Liquefaction

250352, F25B 1900

Patent

active

048400432

ABSTRACT:
In a cryogenic refrigerator having a precooling refrigerating circuit including a cryostat for cooling and maintaining a cryogenic working apparatus which is operated at a very low temperature level, an expander for expanding refrigerant gas, such as helium gas, and a J-T circuit for generating cold by Joule-Thomson expanding refrigerant gas precooled by the precooling refrigerating circuit, the present invention prevents the working vibration of the expander from unduly effecting the cryogenic working apparatus and to maintain the cryogenic working apparatus at a very low temperature level for many hours, even while the precooling refrigerating circuit is stopped thereby enabling a stabilized operation of the cryogenic working apparatus to be performed.

REFERENCES:
patent: 4048814 (1977-09-01), Quack
patent: 4189930 (1980-02-01), Davydov et al.
patent: 4209657 (1980-06-01), Inai et al.
patent: 4223540 (1980-09-01), Longsworth
patent: 4242885 (1981-01-01), Quack et al.
patent: 4366680 (1983-01-01), Twaro
patent: 4432216 (1984-02-01), Matsuda et al.
patent: 4498313 (1985-02-01), Hosoyama et al.
patent: 4510771 (1985-04-01), Matsuda et al.

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