| 摘要 |
PURPOSE:To stably control a variable displacement compressor by opening and closing a flow path of a control chamber to a delivery pressure side or a suction pressure side in response to both delivery and suction pressures. CONSTITUTION:In case of a fixed delivery pressure, a thermal load decreases or a speed of a compressor increases, when a suction pressure decreases to a preset control point or less, a bellows 31 is extended closing the second valve unit 24 via a receiver 33, actuator piece 40 and a receiving member 25, further releasing the first valve unit 22 through an operating bar 38. Consequently, a delivery side pressure communicates with a control chamber 16 via a flow path 20 and a fine passage 21, and a delivery flow amount of the compressor is decreased. Reversely when the suction pressure increases to the preset control point or more, the bellows 31 is contracted closing the first valve unit 22 and releasing the second valve unit 24 through the operating bar 38, and the delivery flow amount of the compressor is increased. |
