Scroll-type variable-capacity compressor with bypass valve

Details Scroll-type variable-capacity compressor with bypass valve Scroll-type variable-capacity compressor with bypass valve

1993-03-30

1995-09-19

Berisch, Richard A.

Pumps

With condition responsive pumped fluid control

Pressure responsive relief or bypass valve

417308, F04B 4900

Patent

active

054511461

ABSTRACT:
A scroll compressor wherein a cylinder is provided along the end plate of a stationary scroll member and a plurality of bypass holes which open in the end plate and can communicate with the space in the cylinder and a plurality of operating spaces formed between the spiral vanes of the stationary scroll member and a moving scroll member are successively opened by a plunger to communicate with the suction side, whereby the capacity may be changed smoothly. When reducing the capacity to close to 0 percent, another cylinder and plunger are used to bypass the discharge pressure to the suction side.

REFERENCES:
patent: 4744733 (1988-05-01), Terauchi et al.
patent: 5049044 (1991-09-01), Hirano
patent: 5193987 (1993-03-01), Iio et al.

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