| 摘要 |
PURPOSE:To change a delivery amount through selective operation of a single solenoid valve, by dividing a delivery chamber into two chambers, providing a check valve between the both chambers, opening and closing a valve part between one of the delivery chambers and a suction chamber, providing a plunger opening and closing the valve part through fluid pressure of the other one of the delivery chambers to the valve part and interposing the solenoid valve between the chambers. CONSTITUTION:If a piston 3 performs reciprocating motion in a cylinder 41, coolant gas flowing into the cylinder 41 from the first suction chamber 52 flows into a high pressure chamber 7 via the first delivery chamber 53 and is fed to a condenser. Here if an electric current is conducted to flow in a coil 91 of a sol- enoid valve 9, a communication hole 61b of the first valve plate 61 always communicates the cylinder 41 and the second delivery chamber 63, while the chamber 63, being communicated to a bearing hole 42 communicated to a low pressure chamber by a communication hole 61c, causes no compression of gas by the cylinder 41 to become an idle condition. Under this condition, only the coolant gas delivered to the chamber 53 is delivered to obtain 50% displacement operation. |
