Control valve for variable displacement compressors

Details Control valve for variable displacement compressors Control valve for variable displacement compressors

1998-12-22

2000-12-26

Walberg, Teresa

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

417222, F04B 126

Patent

active

061649252

ABSTRACT:
A control valve for controlling displacement of a variable displacement compressor having a suction chamber, a discharge chamber, a control chamber, and a pressurizing passage. The control valve adjusts the amount of refrigerant sent to the control chamber from the discharge chamber to control the compressor displacement. The control valve includes a valve body for adjusting the opened area of the pressurizing passage. A solenoid urges the valve body in a first direction with a force corresponding to the value of the current fed to the solenoid. A first and second pressure chamber are partitioned by a diaphragm in the valve. A target value of the pressure difference between the first and second pressure chambers is determined by the urging force of the solenoid. For a given constant solenoid current, the compressor seeks the target value that corresponds to that current. The solenoid requires only a relatively small current range, even if carbon dioxide is used as the refrigerant. Also, the valve minimizes the compressor displacement when it receives no current.

REFERENCES:
patent: 4428718 (1984-01-01), Skinner
patent: 4606705 (1986-08-01), Parekh
patent: 4685866 (1987-08-01), Takenaka et al.
patent: 4752189 (1988-06-01), Bearint et al.
patent: 4819440 (1989-04-01), Nakajima et al.
patent: 4842488 (1989-06-01), Terauchi
patent: 4846630 (1989-07-01), Fujii et al.
patent: 4936752 (1990-06-01), Terauchi
patent: 5000666 (1991-03-01), Esaki
patent: 5152673 (1992-10-01), Pettitt et al.
patent: 5531572 (1996-07-01), Kimura et al.
patent: 5547346 (1996-08-01), Kanzaki et al.
patent: 5620310 (1997-04-01), Takenaka et al.
patent: 5685160 (1997-11-01), Abersfelder et al.
patent: 5785502 (1998-07-01), Ota et al.
patent: 5964578 (1999-10-01), Suitou et al.
patent: 6010312 (2000-01-01), Suitou et al.
patent: 6033189 (2000-03-01), Miura et al.
patent: 6036447 (2000-03-01), Kawaguchi et al.

Affiliated with

Also associated with

Rating

Control valve for variable displacement compressors does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Control valve for variable displacement compressors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control valve for variable displacement compressors will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-988494