Scroll type refrigerant compressor

Details Scroll type refrigerant compressor Scroll type refrigerant compressor

1995-06-01

1996-10-08

Freay, Charles G.

Pumps

With condition responsive pumped fluid control

Pressure responsive relief or bypass valve

417295, 417440, F04B 4900

Patent

active

055624260

ABSTRACT:
A scroll type refrigerant compressor having an axial housing means defining a discharge chamber and a low pressure chamber around the discharge chamber, a stationary scroll , and a movable scroll. The movable scroll engages the stationary scroll and moves along a predetermined orbiting path respective to the stationary scroll. The stationary and movable scrolls define compression chambers therebetween. The stationary end plate of the stationary scroll includes a pair of relief ports for fluid communication between the compression chamber and the low pressure chamber. The compressor further comprises a valve plate in the form of a ring with a pair of valve ports. The valve plate is rotatable about the axis of the compressor between an open position where the valve port is aligned with the relief port to provide fluid communication between the compression chambers and the low pressure chamber and a closed position where the valve port separates the compression chamber from the low pressure chamber. An actuator for rotating the valve plate between the open position and the closed position in response to a refrigeration demand signal.

REFERENCES:
patent: 4456435 (1984-06-01), Hiraga et al.
patent: 5059098 (1991-10-01), Suzuki et al.
patent: 5282728 (1994-02-01), Swain

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