Patent ID: 6974311
Filing Date: 2005-12-13
Classification: F04B,Y10T

Abstract:
1. A control valve for a variable displacement compressor, wherein the compressor includes a discharge pressure zone, a suction pressure zone, a crank chamber, and a supply passage, which communicates the discharge pressure zone with the crank chamber, and wherein a control valve is located in the supply passage and controls the displacement of the compressor by adjusting the pressure in the crank chamber, the control valve comprising: a solenoid, wherein the solenoid has a first end and a second end, and wherein the solenoid has a cylindrical body and a coil, which is located about the cylindrical body; a pressure sensing mechanism located on the first end of the solenoid, wherein the pressure sensing mechanism has a pressure sensing chamber and a diaphragm, wherein the pressure in the suction pressure zone is introduced into the pressure sensing chamber, and wherein the diaphragm is displaced in accordance with the pressure in the pressure sensing chamber; and a valve mechanism located on the second end of the solenoid, wherein the valve mechanism has a valve hole, which forms part of the supply passage, and a valve body, which selectively opens and closes the valve hole in accordance with displacement of the diaphragm, and wherein the cylindrical body has a support end, which supports the diaphragm.