Capacity control device for valiable-capacity compressor

Pumps – Condition responsive control of drive transmission or pump... – Adjustable cam or linkage

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Details

417270, 91505, F04B 126

Patent

active

057022356

ABSTRACT:
A capacity control device for variable-capacity compressors with a high-pressure valve portion 36 for opening or closing the communication between the discharge chamber 21 and the crank case 12; a low-pressure valve portion 41 for opening or closing the communication between the suction chamber 20 and the crank case 12; a valve open-close member 35 for opening or closing so as to reverse the open-close relationship between the high-pressure valve portion 36 and the low-pressure valve portion 41 by advancing or retreating; a pressurising chamber 53 for applying pressure to the valve open-close member 35 in a direction that opens the high-pressure valve portion 36 by a wider effective pressure-receiving area than that of the high-pressure valve portion 36. The device is driven with only small actuation forces by an electromagnetic solenoid 50 to open or close a communicating path between the discharge chamber 21 and the pressurising chamber 53 (FIG. 1).

REFERENCES:
patent: 4747754 (1988-05-01), Fujii et al.
patent: 5000666 (1991-03-01), Esaki
patent: 5486098 (1996-01-01), Kimura et al.

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