| 摘要 |
In a compressor that changes a discharge capacity by using an actuator, a variable displacement swash plate type compressor capable of realizing reduction in manufacture cost is provided.;In the compressor of the present invention, a ring groove is formed in a movable body, and the ring groove is provided with an annular member. The annular member has a joint gap formed by a first to a third cutouts, and the third cutout is an aperture. In this compressor, the annular member moves in the ring groove based on a pressure difference between a control pressure chamber and a swash plate chamber. Thereby, in the compressor, a pressure in the control pressure chamber is regulated by regulating a flow of a refrigerant that flows to the swash plate chamber from the control pressure chamber. |
| 主权项 |
1. A variable displacement swash plate type compressor comprising a housing in which a suction chamber, a discharge chamber, a swash plate chamber and a cylinder bore are formed, a drive shaft that is rotatably supported by the housing, a swash plate rotatable in the swash plate chamber by rotation of the drive shaft, a link mechanism that is provided between the drive shaft and the swash plate, and allows change of an inclination angle of the swash plate to a direction orthogonal to a rotational axis of the drive shaft, a piston that is accommodated in the cylinder bore to be capable of reciprocating, a conversion mechanism that causes the piston to reciprocate in the cylinder bore at a stroke corresponding to the inclination angle by rotation of the swash plate, an actuator capable of changing the inclination angle, and a control mechanism that controls the actuator,
wherein the swash plate chamber communicates with the suction chamber, the actuator has a stationary body fixed to the drive shaft in the swash plate chamber, a movable body movable in a direction of the rotational axis in the swash plate chamber, and a control pressure chamber defined by the stationary body and the movable body, the control mechanism has a supply passage that communicates with the discharge chamber and the control pressure chamber, and introduces a refrigerant in the discharge chamber to the control pressure chamber, and a bleed passage that communicates with the swash plate chamber and the control pressure chamber, and discharges the refrigerant in the control pressure chamber to the swash plate chamber, the bleed passage is provided at least one of a space between the movable body and the drive shaft and a space between the movable body and the stationary body, the bleed passage is provided with an annular member having an aperture that always allows the control pressure chamber and the swash plate chamber to communicate with each other, and the annular member regulates a flow of the refrigerant that flows through the bleed passage by moving in the bleed passage based on a pressure difference between the control pressure chamber and the swash plate chamber. |
