Cryostat with liquefaction refrigerator

Details Cryostat with liquefaction refrigerator Cryostat with liquefaction refrigerator

1991-06-04

1995-01-17

Kilner, Christopher

Refrigeration

Storage of solidified or liquified gas

With conservation of cryogen by reduction of vapor to liquid...

62 511, 62298, F17C 502, F25D 1900, F25B 1900

Patent

active

053816668

ABSTRACT:
In a cryostat with a liquefaction refrigerator, an object to be cooled, as well as a low-temperature end of the liquefaction refrigerator for cooling the object to be cooled, is contained in a thermally-insulated vessel. The liquefaction refrigerator comprises a cooler and a refrigerator, and the cooler comprises, as main components, a heat exchanger and an expansion valve. The refrigerator includes a mechanically-operated cold-generating device. Within a vacuum vessel in the cryostat, the cooler and the refrigerator are thermally connected together by a releasable thermally-conductive member. Since the refrigerator and the cooler are separate from each other, they can be overhauled independently of each other, and the cooler can be of a compact and lightweight design. Therefore, there can be provided the cryostat which is low in running cost, and has an excellent cooling performance.

REFERENCES:
patent: 4277949 (1981-07-01), Longsworth
patent: 4279127 (1981-07-01), Longsworth
patent: 4543794 (1985-10-01), Matsutani et al.
patent: 4756167 (1988-07-01), Kuriyama et al.
patent: 4796433 (1989-01-01), Bartlett
patent: 4854131 (1989-08-01), Sakitani et al.
patent: 4986077 (1991-01-01), Saho et al.
Longsworth, R. C., "Interfacing Small Closed-Cycle Refrigerators to Liquid Helium Cryostats," Cryogenics, Apr. 1974, pp. 175-178.

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