Control valve for variable displacement compressor

Details Control valve for variable displacement compressor Control valve for variable displacement compressor

2006-01-04

2008-10-21

Norman, Marc E (Department: 3744)

Refrigeration

Automatic control

Refrigeration producer

C251S129010, C251S321000

Reexamination Certificate

active

07437881

ABSTRACT:
To provide a control valve for a variable displacement compressor, which is capable of stably operating in a pressure control area, and causing the compressor to quickly shift to operation with the minimum displacement. The control valve for a variable displacement compressor is capable of realizing stable pressure control, since a force applied to a valve element in a valve-closing direction increases when the valve element is in a pressure control area, and is balanced with a force applied to the valve element in a valve-opening direction by the pressure of refrigerant. Further, when the valve element moves past an end point of the pressure control area, the force applied to the valve element in the valve-closing direction decreases to thereby increase the valve-opening degree of a valve portion when the valve portion is fully open. Therefore, when a solenoid is not energized, it is possible to ensure a sufficient flow rate of refrigerant, thereby making it possible to cause the compressor to quickly shift to operation with the minimum displacement.

REFERENCES:
patent: 2004/0202552 (2004-10-01), Okii et al.
patent: 2005/0098211 (2005-05-01), Ichinose et al.
patent: 2005/0211939 (2005-09-01), Morisawa et al.
patent: 2007/0012057 (2007-01-01), Umemura et al.
patent: 2003-328936 (2003-11-01), None

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