Slant plate type compressor with variable displacement mechanism

Details Slant plate type compressor with variable displacement mechanism Slant plate type compressor with variable displacement mechanism

1989-04-24

1991-08-13

Smith, Leonard E.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

417270, F04B 126

Patent

active

050392824

ABSTRACT:
A slant plate type compressor including a crank chamber and a suction chamber is disclosed. The slant plate is disposed in the crank chamber at a variable slant angle. The slant angle varies in dependence on the crank chamber pressure. The crank chamber is linked by a communication path to the suction chamber. The slant angle may be varied by controlling the link of the crank and suction chambers to thereby vary the capacity of the compressor. The link of the crank and suction chambers through the communication path is controlled by a valve mechanism. The valve mechanism includes a first valve control device which opens or closes the communication path in response to an external signal to vary the compressor capacity, and a second valve control device which is responsive to the suction pressure to open or close the communication path. The second valve control device acts to override the first valve control device and isolates the crank chamber from the suction chamber whenever the suction pressure is below a predetermined value. The first valve control device may be an electromagnetic valve and the second valve control device may be a bellows.

REFERENCES:
patent: 4586874 (1986-05-01), Hiraga et al.
patent: 4664604 (1987-05-01), Terauchi
patent: 4747753 (1988-05-01), Taguchi
patent: 4778348 (1988-10-01), Kikuchi
patent: 4842488 (1989-06-01), Terauchi

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