Variable displacement wobble plate type compressor with solenoid

Details Variable displacement wobble plate type compressor with solenoid Variable displacement wobble plate type compressor with solenoid

1987-09-04

1988-05-31

Freeh, William L.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

417270, F04B 106, F04B 128

Patent

active

047477547

ABSTRACT:
A variable wobble plate type compressor with a variable angle non-rotary wobble plate, having a suction chamber for a refrigerant before compression, a discharge chamber for a compressed refrigerant, compressing cylinder bores, pistons reciprocated by the wobble plate within the cylinder bores for compressing the refrigerant, a crankcase having a chamber to receive therein a drive and a wobble plate mechanism, connected to the pistons to cause the reciprocating motion of the pistons and capable of changing the wobble angle thereof, a first passageway closably opened so as to apply a high discharge gas pressure of the discharge chamber to the drive and wobble plate mechanism within the crankcase chamber, a solenoid valve for closing and opening the first passageway in response to a change in a cooling load, and a second passageway providing a fluid communication between the crankcase chamber and the suction chamber, a spool valve urged by a spring toward a first position opening the second passageway thereby permitting evacuation of a high pressure gas from the crankcase chamber to the suction chamber while the solenoid valve is closing the first passageway, and moved toward a second position closing the second passageway in association with the operation of the solenoid valve for opening the first passageway.

REFERENCES:
patent: 4526516 (1985-07-01), Swain
patent: 4606705 (1986-08-01), Parekh

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