Cryogenic refrigeration apparatus

Details Cryogenic refrigeration apparatus Cryogenic refrigeration apparatus

1989-02-03

1989-11-14

Capossela, Ronald C.

Refrigeration

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

60520, F25B 900

Patent

active

048798762

ABSTRACT:
A cryogenic refrigeration apparatus that re-liquifies boiled off cryogenic gases and returns the cooled, re-liquified gases to the cryogenic load. Reciprocation of a driver piston effects simultaneous and corresponding reciprocation of compressor and expander pistons. A magnetic sensor senses the position of the driver piston when at its top dead center position, its bottom dead center position, and a position about half way therebetween. Signals corresponding to the sensed position of the driver piston are sent to a logic control unit that governs the opening and closing of valves throughout the apparatus.

REFERENCES:
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patent: 4389849 (1983-06-01), Gasser et al.
patent: 4417448 (1983-11-01), Horn et al.
patent: 4526008 (1985-07-01), Taylor, Sr.
patent: 4534176 (1985-08-01), Horn et al.
patent: 4543793 (1985-10-01), Chellis et al.
patent: 4545209 (1985-10-01), Young
patent: 4724676 (1988-02-01), Lewis

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