Patent ID: 7452192

Claim:
A control valve for a variable displacement compressor, which is mounted on the variable displacement compressor for control of pressure in a gastightly-formed crankcase by sensing suction pressure, comprising: a vacuum container that contains a first plunger in a state urged in a direction away from a core of a solenoid; a diaphragm for sensing the suction pressure, the diaphragm sealing an open end of the vacuum container such that an inside of the vacuum container is kept gastight and having an inner surface with which the first plunger is in abutment in an urged state; and a second plunger that is disposed between the diaphragm and a valve section for controlling pressure in the crankcase, and urged in a direction away from the diaphragm such that the second plunger opens the valve section when the solenoid is not energized, wherein the first plunger and the second plunger are magnetically coupled via the diaphragm when the solenoid is energized.