Variable capacity compressor

Details Variable capacity compressor Variable capacity compressor

1988-04-07

1991-05-21

Smith, Leonard E.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

417295, F04B 128

Patent

active

050170961

ABSTRACT:
A variable capacity compressor for use in a heat-exchange circuit. A pressure responsive valve is provided in a communication passageway extending between a low pressure chamber and a pressure controlled chamber. The pressure responsive valve is operative in response to pressure within the low pressure chamber for opening and closing the communication passageway to control pressure within the pressure controlled chamber, thereby varying the capacity of the compressor in such a manner as to reduce the capacity when the pressure within the low pressure chamber decreases to a level lower than a predetermined value. An electrically operated control device is operative in response to pressure or temperature of refrigerant gas in an evaporator of the heat-exchange circuit for maintaining the capacity large independently of operation of the pressure responsive valve, even if the pressure within the low pressure chamber decreases to a level lower than the predetermined value.

REFERENCES:
patent: 4132036 (1979-01-01), Koontz
patent: 4664604 (1987-05-01), Terauchi
patent: 4669272 (1987-06-01), Kawai et al.
patent: 4687419 (1987-08-01), Suzuki et al.
patent: 4778348 (1988-10-01), Kikuchi et al.
patent: 4778352 (1988-10-01), Nakajima
patent: 4780060 (1988-10-01), Terauchi

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