| 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.
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