Elektromagnetisches Steuerventil

摘要

This invention reduces the size of the solenoid section of the control valve and simplifies its mechanism. In particular, the invention is intended to enable the control of a variable capacity compressor. In the differential pressure section B1, a path is formed between a compressor's Pc pressure introducing port 15c and a suction side. In this path a Pc valve disc 17 is installed which engages with or disengages from a valve seat 15e2 formed in the path on the suction side of a valve opening 15e1. The Pc valve disc 17 is urged by an adjust spring 20 to close the valve opening. In the solenoid proportional control section B2, a plunger chamber R3 is formed which has a Pd pressure introducing port 15g. A plunger 24 is movably installed in the plunger chamber R3 and is fitted with a connecting rod 25, which passes through a through-hole 15d1 in the solenoid proportional control section B2, the Pc pressure introducing port 15c and the valve opening 15e1 to contact the Pc valve disc 17. A plunger spring 26, which has greater spring force than the adjust spring 20, is installed in opposition to the adjust spring 20. In the plunger chamber R3 is installed a Pd valve disc 27which opens and closes the through-hole 15d1 as the plunger 24 moves in the plunger chamber R3.