Control apparatus for variable displacement compressor

Details Control apparatus for variable displacement compressor Control apparatus for variable displacement compressor

1995-10-06

1998-07-28

Thorpe, Timothy

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

4172221, 417270, F04B 126

Patent

active

057855021

ABSTRACT:
A swash plate tiltably supported on a drive shaft is controlled by adjusting the pressure in a crank chamber. When an electromagnetic valve is de-excited, the high-pressure refrigerant gas in a discharge chamber is supplied to the crank chamber so that the inclination angle of the swash plate is shifted to its minimum inclination from its maximum inclination. An open/close mechanism located in a suction passage gradually opens or closes the suction passage in accordance with the differential pressure between the pressure in the external refrigeration circuit located upstream the open/close mechanism and the pressure in a suction chamber. When the inclination angle of the swash plate is minimized, the open/close mechanism closes the suction passage. It is therefore possible to prevent frosting while also suppressing rapid changes in load torque.

REFERENCES:
patent: 5173032 (1992-12-01), Taguchi et al.
patent: 5529461 (1996-06-01), Kawaguchi et al.
patent: 5586870 (1996-12-01), Kawaguchi et al.
patent: 5603610 (1997-02-01), Kawaguchi et al.
patent: 5624240 (1997-04-01), Kawaguchi et al.

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