Clutchless variable capacity swash plate compressor

Details Clutchless variable capacity swash plate compressor Clutchless variable capacity swash plate compressor

1998-05-20

2000-04-04

Freay, Charles G.

Pumps

Condition responsive control of drive transmission or pump...

Having condition responsive pumped fluid control

4172222, 417270, F04B 126

Patent

active

060453370

ABSTRACT:
There is provided a clutchless variable capacity swash plate compressor. A valve element is arranged at an intermediate portion of a refrigerant inlet passage, for increasing and decreasing an opening area of the intermediate portion. An urging member urges the valve element in a direction of a large valve opening position in which the opening area is large. An accumulator accumulates the high-pressure refrigerant gas therein to build up pressure for urging the valve element in a direction of a small valve opening position in which the opening area is small. When suction pressure of the suction refrigerant gas is high, a pilot valve closes to inhibit the supply of a high-pressure refrigerant to the accumulator to thereby bring the valve element to the large valve opening position, whereas when the suction pressure is low, the pilot valve opens to permit the supply of the high-pressure gas to the accumulator to bring the valve element to the small valve opening position. A selector valve operates to select a first valve position for establishing communication between the suction port and the crankcase when the valve element is in the large valve opening position, and a second valve position for establishing communication between the suction chamber and the accumulator when the valve element is in the small valve opening position.

REFERENCES:
patent: 4723891 (1988-02-01), Takenaka et al.
patent: 4730986 (1988-03-01), Kayukawa et al.
patent: 5577894 (1996-11-01), Kawaguchi et al.
patent: 5785502 (1998-07-01), Ota et al.

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