Helium refrigerator with compressor drive control

Details Helium refrigerator with compressor drive control Helium refrigerator with compressor drive control

1994-07-07

1996-03-19

Capossela, Ronald C.

Refrigeration

Using electrical or magnetic effect

Thermoelectric; e.g., peltier effect

62 37, 622283, F25J 100

Patent

active

054995051

ABSTRACT:
The recompression line for the gas in the cold container (7) comprises at least one compressor (C) with which at least a first means (N.sub.1) for controlling the speed of rotation of the compressor as a function of parameters (inter alia, flow rate (D), pressure (P)) of the fluid in the line (8) is associated. In order to ensure an adequate fluid flow rate at the inlet of the compressor, the installation comprises a line (9) comprising a pilot-operated valve (V.sub.1) and by-passing the compressor, and a line (10) comprising a pilot-operated valve (V.sub.2) connecting the inlet line (4) to the compression line (8).
Used, inter alia, in installations for refrigerating superconductive elements.

REFERENCES:
patent: 3307370 (1967-03-01), Klipping
patent: 4267701 (1981-05-01), Toscano
patent: 4439997 (1984-04-01), Cantley
patent: 4582519 (1986-04-01), Someya et al.
patent: 4757689 (1988-07-01), Bachler et al.
patent: 5265426 (1993-11-01), Gistau-Baguer
Cryogenic Engineering (JP), Vol. 20, No. 4, 1985, Tokyo, Japan, pp. 224-229, S. Togo et al., "A Helium Refrigerator with Low-Temperature Centrifugal Compressors".

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