Unloading system for two compressors

Details Unloading system for two compressors Unloading system for two compressors

1990-06-28

1991-11-05

Tanner, Harry B.

Refrigeration

Processes

Compressing, condensing and evaporating

621962, 62197, 622285, F25B 4104

Patent

active

050622749

ABSTRACT:
An economizer is connected to a fluid line connecting the booster compressor and high stage compressor of a refrigeration system at a point downstream of the bypass for unloading the booster compressor. The economizer flow controls the discharge temperature of the second stage and, in addition, coacts with the bypassing of the booster compressor such that all of the flow supplied to the high stage is at system suction pressure when the bypass is fully open. When the booster compressor is fully unloaded and the unloading valve is fully open, the booster compressor is shut off and bypass flow for unloading reverses direction to permit flow from the condenser to the second stage past the shut off booster compressor.

REFERENCES:
patent: 2388556 (1945-11-01), Lathrop
patent: 3495418 (1970-02-01), Kapich
patent: 3859815 (1975-01-01), Kasahara
patent: 4324105 (1982-04-01), Cann
patent: 4526012 (1985-07-01), Chigira
patent: 4938029 (1990-07-01), Shaw

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