CONTROL VALVE FOR VARIABLE DISPLACEMENT COMPRESSOR

摘要

PROBLEM TO BE SOLVED: To satisfactorily maintain control characteristics of a control valve for a variable displacement compressor even under high-pressure environments.SOLUTION: A control valve according to one embodiment includes a shaft 68 that transmits the solenoidal force to a valve element. A solenoid 3 includes: a bottomed sleeve 52 into which the pressure of a refrigerant is introduced; a core 50 secured coaxially to the sleeve 52; a plunger 54 that is contained in the sleeve 52 on its bottom side and displaceable integrally with the shaft 68 in an axial direction; a spring 40 that can apply the biasing force in a valve opening direction to the shaft 68; a spring 78 that can apply the biasing force in a valve closing direction to the plunger 54; and a shaft support member 76, which is press-fitted such that the shaft support member 76 is secured to an inner wall of the sleeve 52 near its bottom portion. The spring 78 is set between the shaft support member 76 and the plunger 54. A deformation of the bottom portion of the sleeve 52 in the axial direction presses the shaft support member 76 and thereby adjusts the press-fitting position thereof in the sleeve 52.