Capacity control valve for a variable capacity refrigerant compr

Details Capacity control valve for a variable capacity refrigerant compr Capacity control valve for a variable capacity refrigerant compr

1994-10-12

1996-07-02

Freay, Charles

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

F04B 126

Patent

active

055315720

ABSTRACT:
A capacity control valve for a variable capacity refrigerant compressor for controlling the compressor capacity by adjustably changing a pressure level prevailing in a crank chamber of the compressor, the capacity control valve having a valve mechanism opening and closing a portion of a gas-supply passageway extending between a discharge chamber and the crank chamber of the compressor, and a discharge pressure responsive unit controlling a movement of the valve mechanism in such a manner that only when the discharge pressure of the refrigerant gas is below a predetermined pressure level, does the valve mechanism reduce the opening area of the portion of the gas-supply passageway due to a force provided by the discharge pressure responsive unit in addition to a different force produced by the discharge pressure of the refrigerant gas. The capacity control valve enables the compressor to produce a satisfactory refrigerating performance irrespective of the environmental temperature.

REFERENCES:
patent: 4428718 (1984-11-01), Skinner
patent: 4723891 (1988-02-01), Takenaka et al.
patent: 5205718 (1993-04-01), Fujisawa et al.
patent: 5318410 (1994-06-01), Kawamura et al.

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