A capacity control valve for controlling a flow rate or pressure of a variable capacity compressor includes: a valve main body, a valve body arranged in the valve main body, a solenoid having a first plunger connected to the valve body, and a second plunger arranged between the solenoid and the valve body for regulating flow of the variable capacity compressor.

A capacity control valve includes a valve housing discharge, port, a suction port, and control ports, and a valve element to be brought into contact with and separated from a valve seat by a driving force of a solenoid to open and close a communication between the control and discharge ports or communication between the control port and the suction port. A sliding region is formed by an inner peripheral surface of the valve housing and an outer peripheral surface of the valve element, a groove extending in a circumferential direction is formed in at least one of the housing inner peripheral surface of the valve housing and the outer peripheral surface of the valve element, and the sliding region has a structure in which a swirling current is generated in the groove by fluid flowing from a high-pressure side to a low-pressure side in a clearance between the inner peripheral surface and the outer peripheral surface of the valve element.

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.

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 (1) includes a valve main body (10) having a first communication passage (11), a second communication passage (12), a third communication passage (13), and a main valve seat (15a), a valve element (20) having an intermediate communication passage (29), a main valve portion (21c), and an auxiliary valve portion (23d), a solenoid (30) that drives a rod (36) having an auxiliary valve seat (26c), and a first biasing member (43) that biases in the valve closing direction of the main valve portion (21c). A spring constant of the first biasing member (43) has a characteristic that the spring constant is increased in an opened state of the main valve portion (21c) and decreased in a closed state. The capacity control valve can efficiently discharge a liquid coolant and lower drive force of a compressor at a liquid coolant discharging operation.

A capacity control valve includes: a valve housing having a Pc port, a Ps port and a Pd port; a main valve element which includes a main valve portion coming contacting and separating from a main valve seat opening and closing communication between the Pd port and the Pc port by a drive force of a solenoid; an intermediate communication path communicating the Pc port with the Ps port; and a pressure-sensitive valve opening and closing the intermediate communication path by an ambient pressure, in which the valve housing have a differential pressure valve housed therein, the differential pressure valve including a differential pressure valve element and opening and closing a communication between the Pc port and the Ps port by the differential pressure valve element moved by an operation force of an operation member operated by a discharge pressure Pd from the Pd port.

A variable-capacity compressor control valve is configured for easily regulating the opening degree of an in-valve release passage, and thus can effectively reduce internal circulation of refrigerant within the compressor and effectively improve the operation efficiency of the compressor. An in-valve large-opening release passage with a relatively large opening degree, which is used during the compressor actuation time, and an in-valve small-opening release passage with a relatively small opening degree, which is used during both the compressor actuation time and the normal control time (i.e., Pd.fwdarw.Pc control time), are formed using different passages.

A variable displacement compressor capable of preventing delay in pressure release of a controlled pressure chamber, such as a crank chamber. A switching valve (350) disposed downstream of a control valve of a pressure supply passage includes a main valve body (352) and a sub valve body (400). The main valve body (352) includes an internal passage (352d) providing communication between a first valve hole (104e1) communicating with a pressure supply passage (145a) between the control valve and the switching valve (350), and a second valve hole (151a) communicating with a pressure supply passage (145b) between the switching valve (350) and the crank chamber. The main valve body (352) provides communication between the second valve hole (151a) and a pressure release hole (351a1) communicating with the suction chamber, when pressure Pm in the pressure supply passage (145a) is lower than pressure Pc in the crank chamber. The sub valve body (400) closes the internal passage (352d) of the main valve body (352), when pressure Pm is lower than pressure Pc. The sub valve body (400) is lighter than the main valve body (352), and thus, when pressure Pm decreases, the sub valve body (400) actuates before the main valve body (352), to close the internal passage (352d) of the main valve body (352).

A capacity control valve includes a valve housing formed with a discharge port, a suction port, and first and second control ports, a rod movably arranged in the valve housing and driven by a solenoid, a CS valve configured to control a fluid flow between the first control port and the suction port in accordance with a movement of the rod, and a DC valve configured to control a fluid flow between the second control port and the discharge port in accordance with the movement of the rod. In a non-energization state, the CS valve is closed and the DC valve is closed. As the energization of the solenoid becomes larger, the CS valve transitions from a closed state to an open state and the DC valve transitions from a closed state to an open state.