A variable displacement compressor which prevents leakage of a refrigerant flowing directly into a suction chamber without passing via a crank chamber at a time of a minimum discharge displacement operation, thus making it possible to prevent an increase of a minimum discharge displacement by increasing a refrigerant pressure in the crank chamber, and in addition, making it possible to prevent insufficient lubrication of sliding portions and the like in the crank chamber.

Disclosed is a capacity control valve includes a valve housing. A main valve including a valve body is driven by a solenoid, and a main valve seat which is between a discharge port and a control port and with which the valve body can contact, a pressure sensitive valve member forms a pressure sensitive valve, together with a pressure sensitive body disposed in a pressure sensitive chamber. The control port and a suction port communicate with each other through an intermediate communication passage by opening and closing of the pressure sensitive valve. The pressure sensitive valve member has a through-hole communicating with the intermediate communication passage, and has an opening and closing member attached thereto such that the opening and closing member is restricted in movement with respect to the valve housing by restriction device and slides relative to the pressure sensitive valve member to open and close the through-hole.

A capacity control valve includes a valve housing. A main valve including a valve body is driven by a solenoid, and a main valve seat which is provided between a discharge port and a control port and with which the valve body 51 is allowed to contact. A pressure sensitive valve member forming a pressure sensitive valve with a pressure sensitive body is disposed in a pressure sensitive chamber. The control port and a suction port communicate through an intermediate communication passage by opening the pressure sensitive valve. A slide valve body slides relative to the pressure sensitive valve member to open and close a through-hole communicating with the intermediate communication passage. The slide valve body partitions the pressure sensitive chamber into a Pd side space and a Pc side space, and a Pd-Pc flow passage providing communication between two spaces and is formed in the slide valve body.

A control valve includes: a first valve to control a flow rate of refrigerant flowing from a discharge chamber to a control chamber of a compressor; a second valve to control a flow rate of the refrigerant flowing from the control chamber to a suction chamber; a solenoid to generate a drive force in a first valve closing direction and a second valve opening direction; a biasing member to generate a biasing force in an first valve opening direction and a second valve closing direction; and a pressure sensing part to sense a pressure in the suction chamber or the control chamber, and generate a counterforce against the drive force. A state in which both of the first and second valves are open is present during an increase in the current supplied to the solenoid from zero to an upper limit current value, and an increase rate of an opening degree of the first valve is increased during a decrease in the current supplied to the solenoid, a predetermined lower limit current value being an inflection point of the increase.

A capacity control valve includes a valve housing provided with a main valve seat; a main valve body that is inserted into the valve housing and includes a main valve portion which is capable of seating on the main valve seat 10a to open and close a communication between a suction port and a control port using a driving force of a solenoid; and a pressure-sensitive body that applies a biasing force to the main valve body in an opening direction according to pressure of a fluid surrounding the pressure-sensitive body. The fluid is supplied from the control port to around the pressure-sensitive body, and the fluid is supplied from the suction port to a back pressure side of the main valve body.

A capacity control valve V includes a valve housing, a primary valve opened and closed by a driving force of a solenoid, a pressure-sensitive valve disposed in a pressure-sensitive chamber, and a differential pressure valve opened and closed by a differential pressure valve body moved by a pressure. A control port and a suction port communicate with each other through an intermediate communication path by opening and closing the pressure-sensitive valve. An adapter is provided with an accommodation portion accommodating a differential pressure valve body, and first urging member and a second urging member are interposed in the accommodation portion on both sides of the differential pressure valve in an opening and closing direction with the differential pressure valve body interposed therebetween.

A capacity control valve includes a valve housing; a rod configured to be driven by a solenoid; a CS valve formed by a CS valve seat and a CS valve element configured to open and close a communication between the control port and the suction port; a DC valve formed by a DC valve seat and a DC valve element arranged movably with respect to the CS valve element, the DC valve being configured to open and close a communication between the discharge port and the control port in accordance with movement of the rod; and a pressure drive portion coupled to the CS valve element to be movable in an integrated manner with the CS valve element and arranged in a suction fluid supply chamber formed in the valve housing and to which the suction fluid is supplied, the pressure drive portion being driven by the suction pressure.

A spool operation failure due to foreign matter contamination is prevented. A variable displacement compressor 100 includes a first control valve 300 controlling the opening degree of a supply passage 145, a check valve 350, a second control valve 400 controlling the opening degree of a discharge passage 146, and a back-pressure relief passage 147. The second control valve 400 includes a back pressure chamber 410 communicating with an intermediate supply passage 145b1, a valve chamber 420 to which a valve hole 103d and a discharge hole 431a are open and that constitutes a part of the discharge passage 146, a partition member 430 partitioning into the back pressure chamber 410 and the valve chamber 420, and a spool 440 extending through a through hole 432a formed in the partition member 430. The spool 440 has a pressure receiving portion 441 disposed in the back pressure chamber 410, a valve portion 442 disposed in the valve chamber 420, and a shaft portion 443. The spool 440 is supported in a manner slidable in the opening and closing directions on the partition member 430 by arranging the spool valve 440a, constituted by the valve portion 442 and the shaft portion 443, to be in contact with the partition member 430.

A capacity control valve includes a valve housing having a main valve seat portion formed on an inner peripheral surface, a main valve body that has a main valve portion capable of seating on the main valve seat portion and capable of blocking communication between a discharge port and a control port depending on a driving force of a solenoid, a relief valve that is opened by pressure, a first flow channel that allows the control port and a suction port to communicate with each other when the relief valve is opened. A second flow channel formed at least partially in parallel with the first flow channel allows the control port and the suction port to communicate with each other. A spool valve body is reciprocally disposed in a sleeve and capable of adjusting an opening of the second flow channel depending on the driving force of the solenoid.

A capacity control valve includes a valve housing provided with a discharge port, suction ports, a control port allowing a control fluid of a control pressure Pc to pass therethrough and a primary valve including a primary valve seat and a primary valve body driven by a solenoid and opening and closing a communication between the discharge port and the control port by the movement of the primary valve body. The capacity control valve further includes a CS valve which includes a CS valve body, a first spring urging the CS valve body in a closing direction, and a second spring urging the CS valve body in an opening direction, the control port and the suction port being opened at a valve closed position of the primary valve body, the control port and the suction port being closed at a valve opened position of the primary valve body.