Capacity control device of scroll-type fluid compressor

Details Capacity control device of scroll-type fluid compressor Capacity control device of scroll-type fluid compressor

1988-03-25

1989-12-12

Croyle, Carlton R.

Pumps

With condition responsive pumped fluid control

Pressure responsive relief or bypass valve

417310, F04B 4902

Patent

active

048864250

ABSTRACT:
A capacity control device controls an amount of fluid bypassed from a compression chamber formed between contacts of a stationary and revolving spiral elements into a suction chamber by an actuator. The capacity control device provides a feedback mechanism in which a relation between a suction pressure of the compressor and a pressure of actuating the actuator is a function of the first degree and controls the suction pressure to be constant. A capacity control amount of the compressor can be determined only by the suction pressure of the compressor independent of other variation factors. Accordingly, the minimum suction pressure can be restricted strictly and frost control can be attained by the compressor itself.

REFERENCES:
patent: 2433302 (1947-12-01), Synder
patent: 2683418 (1954-07-01), Smith Jr.
patent: 2963219 (1960-12-01), Palmqvist et al.
patent: 4222712 (1980-09-01), Huber et al.
patent: 4544333 (1985-10-01), Hirano

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