| 摘要 |
A displacement control valve for a clutchless type variable displacement compressor is provided to guarantee control of a flow rate of refrigerant passing through a valve hole in a control area and secure a flow rate of refrigerant passing through the valve hole in minimum capacity operation, thereby making lubrication in a compressor sufficiently. A displacement control valve for a clutchless type variable displacement compressor includes a first port(55) connected to a discharge pressure area, and a second port(57) connected to a control pressure chamber, wherein the first and second ports are connected by a refrigerant path having a valve hole(54). A reciprocating element(70) has a valve element(72) for opening or closing the valve hole. The reciprocating element has a first axial part(71) formed with the valve element, and a second axial part(75) having a same axial line with the first one and inserted into the valve hole. A pressure sensing element(62) moves the reciprocating element in a predetermined direction for opening the valve hole according to pressure of the discharge pressure area. A solenoid(66) presses the reciprocating element in a predetermined direction to close the valve hole. The first axial part is positioned in the vicinity of the solenoid and the second one is connected to the pressure sensing element. The second axial part and the valve hole form a path for free refrigerant flow. A throttle part(76) is formed between the first and second axial parts with the same axial line with the same. A flow rate of the path is restrained by the throttle part which has a diameter at an end larger than that of the second axial part.
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