A subassembly for a compressor controls a fluid flow of a fluid between a high-pressure region and a crank chamber pressure region and between the crank chamber pressure region and a suction pressure region of the compressor. The subassembly includes a first electrical control valve, a second electrical control valve, and an electrical control device. Each of the first electrical control valve and the second electrical control valve has a valve member arranged within a valve housing and displaceable between a pair of positions. The electrical control device is adapted to control, during operation of the compressor, a fluid flow between the high-pressure region and a crank chamber pressure region and between the crank chamber pressure region and the suction pressure region by controlling the positions of the valve members.

A subassembly for a compressor controls a fluid flow of a fluid between a high-pressure region and a crank chamber pressure region and between the crank chamber pressure region and a suction pressure region of the compressor. The subassembly includes a first electrical control valve, a second electrical control valve, and an electrical control device. Each of the first electrical control valve and the second electrical control valve has a valve member arranged within a valve housing and displaceable between a pair of positions. The electrical control device is adapted to control, during operation of the compressor, a fluid flow between the high-pressure region and a crank chamber pressure region and between the crank chamber pressure region and the suction pressure region by controlling the positions of the valve members.

Multiport pumps and associated pumping systems are described that provide a selective hydraulic or electrically powered pump/pump system. The pumps provide movement within a device or larger system. Movement can cause compression/expansion of a fluid and provide fluid movement within the same device or system. In this instance, the volume of fluid and the fluid flow path within, from, and to the pump(s) is kept constant to reduce or eliminate cavitation, seizure, and/or hydraulic lock. Use of at least one reservoir comprising; a compensator tank, a port allowing for operation at ambient pressure, and a pressure measuring device measuring pressure allowing for unbalanced flow to and from the multiport pumps along with thermal expansion or compression is detailed. In addition, use of a multiport swashplate pumps and associated valve plates that incorporate the features and functions of several valves not heretofore provided within the pump itself is also described.

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). The rod (36) is relatively moved with respect to the valve element (20) so as to open and close the auxiliary valve portion. The capacity control valve can efficiently discharge a liquid coolant irrespective of pressure of a suction chamber and lower drive force of a compressor at a liquid coolant discharging operation.

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). The rod (36) is relatively moved with respect to the valve element (20) so as to open and close the auxiliary valve portion. The capacity control valve can efficiently discharge a liquid coolant irrespective of pressure of a suction chamber and lower drive force of a compressor at a liquid coolant discharging operation.

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 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 provided with a discharge port, suction ports, a control port and a primary valve driven by a solenoid. The capacity control valve further includes a differential CS valve which includes a differential CS valve body disposed so as to be relatively movable in an axial direction with respect to the primary valve bodies. The differential CS valve body divides a control pressure chamber into a discharge side control chamber communicating with the first control port and a suction side control chamber communicating with the second control port in the axial direction and operates the differential CS valve body by a differential pressure between the discharge side control chamber and the suction side control chamber so as to open the second control port and the suction port.

A capacity control valve includes a valve housing provided with a discharge port, suction ports, a control port and a primary valve driven by a solenoid. The capacity control valve further includes a differential CS valve which includes a differential CS valve body disposed so as to be relatively movable in an axial direction with respect to the primary valve bodies. The differential CS valve body divides a control pressure chamber into a discharge side control chamber communicating with the first control port and a suction side control chamber communicating with the second control port in the axial direction and operates the differential CS valve body by a differential pressure between the discharge side control chamber and the suction side control chamber so as to open the second control port and the suction port.

A capacity control valve is provided with a throttle valve portion having a communication hole and a second valve hole. The communication hole is provided between a second valve portion and a third valve portion and makes an intermediate communication passage communicate with a third valve chamber. The second valve hole is provided between a second valve chamber and the third valve chamber. An amount of narrowing of the throttle valve portion in relation to a stroke of a valve element is set larger when the second valve portion initially opens by separating from a second valve seat face, and then becomes narrower after the initial opening of the valve. The capacity control valve is capable of shortening a start-up time and improving the operating efficiency of a variable capacity compressor.