Abstract: Disclosed is a switching valve having a small contact resistance when a valve body moves along a seating surface of a housing. In a switching valve which includes a valve body, coming into contact with a seating surface of a housing having a plurality of ports and selectively communicating at least two ports of the plurality of ports, and applies a fluid pressure to a back surface of the valve body, the switching valve includes a biasing member configured for biasing the valve body in a direction in which the valve body is moved away from the seating surface of the housing.

Abstract: A fluid control valve having extremely high responsiveness not only when a pressure of a working fluid of a first flow path is high but also when the pressure of the working fluid of the first flow path is low includes: a valve seat; a valve body contacting and separating from the valve seat; a first biasing member biasing the valve body in a valve closing direction; and a second biasing member having a spring force lower than that of the first biasing member, wherein the valve body is axially divided into a base portion biased by the first biasing member and an opening and closing portion contacting and separating from the valve seat, and the second biasing member is disposed so that the base portion and the opening and closing portion are axially separable from each other.

Abstract: Provided is a valve capable of reliably blocking a gap between a valve body and a valve seat at least in a valve closed state. A valve includes a valve seat and a valve body, wherein the valve body and the valve seat are apart from each other at a radial gap and are arranged to be relatively movable in a reciprocating manner and an elastically deformable annular sealing body extends from one of the valve body and the valve seat so as to seal the gap.

Abstract: A capacity control valve includes: a valve body having first communication passages, second communication passages, third communication passages, and a main valve seat; a valve element having an intermediate communication passage, a main valve portion and an auxiliary valve portion; a pressure-sensitive element disposed in the valve body; a solenoid that drives a rod; a first biasing member that biases in a valve closing direction of the main valve portion; and a second biasing member that biases in a valve opening direction of the main valve portion, wherein the rod moves relative to the valve element to press the pressure-sensitive element. The capacity control valve can efficiently discharge a liquid refrigerant and can decrease a driving force of a compressor during a liquid refrigerant discharge operation.

Abstract: A capacity control valve includes: a valve body having first communication passages, second communication passages, third communication passages, and a main valve seat; a valve element having an intermediate communication passage, a main valve portion and an auxiliary valve portion; a pressure-sensitive element disposed in the valve body; a solenoid that drives a rod; a first biasing member that biases in a valve closing direction of the main valve portion; and a second biasing member that biases in a valve opening direction of the main valve portion, wherein the rod moves relative to the valve element to press the pressure-sensitive element. The capacity control valve can efficiently discharge a liquid refrigerant and can decrease a driving force of a compressor during a liquid refrigerant discharge operation.

Abstract: 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.

Abstract: A capacity control valve includes: a valve body (10) having first communication passages (11), second communication passages (12), third communication passages (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 pressure-sensitive element (24) disposed in the valve body (10); a solenoid (30) that drives a rod (36); a first biasing member (43) that biases in a valve closing direction of the main valve portion (21c); and a second biasing member (44) that biases in a valve opening direction of the main valve portion (21c), wherein the rod (36) moves relative to the valve element (20) to press the pressure-sensitive element (24). The capacity control valve can efficiently discharge a liquid refrigerant and can decrease a driving force of a compressor during a liquid refrigerant discharge operation.

Abstract: In an exemplary embodiment, a capacity control valve includes: a valve main body 2 having a first valve chamber 7 through which a fluid at control pressure passes and which has a first valve seat surface 31A, and an interior space 4 through which a fluid at suction pressure passes; and a valve body 21 having an intermediate communication passage 26 for communicating the first valve chamber 7 and the interior space 4, and a first valve part 21C for opening and closing the intermediate communication passage 26 adjacent to the first valve seat surface 31A, wherein an opening area of the first valve part 21C is smaller than that of the intermediate communication passage 26. The capacity control valve is capable of simultaneously achieving reduction of a start-up time of the variable capacity compressor and improvement of responsiveness of capacity control at the time of control.

Abstract: Provided is a displacement control valve capable of quickly reducing pressure in a control chamber to a level of pressure kept during continuous driving, at the time of the startup of a variable displacement compressor. The valve housing is provided with a through hole constituting a part of a first communicating passage that communicates with a pressure chamber at one end thereof and that is communicable with a second valve chest at the other end thereof.

Abstract: A capacity control valve includes: a valve body (10) having first communication passages (11), second communication passages (12), third communication passages (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 pressure-sensitive element (24) disposed in the valve body (10); a solenoid (30) that drives a rod (36); a first biasing member (43) that biases in a valve closing direction of the main valve portion (21c); and a second biasing member (44) that biases in a valve opening direction of the main valve portion (21c), wherein the rod (36) moves relative to the valve element (20) to press the pressure-sensitive element (24). The capacity control valve can efficiently discharge a liquid refrigerant and can decrease a driving force of a compressor during a liquid refrigerant discharge operation.

Abstract: A displacement control valve is provided for discharging liquid refrigerant in a control chamber at startup and achieves a reduction in startup time and an improvement in operating efficiency during control of a variable displacement compressor simultaneously. The opening area between communicating holes in a third valve section and a third valve seat surface in a control area to control the flow rate or pressure in a working control chamber is set smaller than the area of auxiliary communicating passages.

Abstract: A displacement control valve improved in the function of discharging a liquid refrigerant in a control chamber at startup achieves a reduction in startup time and an improvement in operating efficiency during control of a variable displacement compressor simultaneously. An opening area between a third valve section and a third valve seat surface in a control area to control the flow rate or pressure in a working control chamber is set smaller than an area of an auxiliary communicating passage, thereby reducing the minimum area of a Pc-Ps flow path in the control area.

Abstract: In an exemplary embodiment, a capacity control valve includes: a valve main body 2 having a first valve chamber 7 through which a fluid at control pressure passes and which has a first valve seat surface 31A, and an interior space 4 through which a fluid at suction pressure passes; and a valve body 21 having an intermediate communication passage 26 for communicating the first valve chamber 7 and the interior space 4, and a first valve part 21C for opening and closing the intermediate communication passage 26 adjacent to the first valve seat surface 31A, wherein an opening area of the first valve part 21C is smaller than that of the intermediate communication passage 26. The capacity control valve is capable of simultaneously achieving reduction of a start-up time of the variable capacity compressor and improvement of responsiveness of capacity control at the time of control.

Abstract: Provided is a displacement control valve capable of quickly reducing pressure in a control chamber to a level of pressure kept during continuous driving, at the time of the startup of a variable displacement compressor. The valve housing is provided with a through hole constituting a part of a first communicating passage that communicates with pressure chamber at one end thereof and that is communicable with a second valve chest at the other end thereof.

Abstract: In an exemplary embodiment, a capacity control valve is provided with a throttle valve portion 12 having a communication hole 23 and a second valve hole 12A. The communication hole 23 is provided between a second valve portion 21B and a third valve portion 21A and makes an intermediate communication passage 26 communicate with a third valve chamber 4. The second valve hole 12A is provided between a second valve chamber 6 and the third valve chamber 4. An amount of narrowing of the throttle valve portion 12 in relation to a stroke of a valve element 21 is large when the second valve portion 21B initially opens by separating from a second valve seat face 6A, and then becomes less 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.

Abstract: The inflow of an external fluid into a mounting hole of a displacement control valve can be prevented, and accumulated gas in the mounting hole due to the permeation leakage of high-pressure gas can be discharged to the outside. A displacement control valve 1 inserted and fitted in a mounting hole 3 provided in a casing of a device controlled in displacement includes a sealing lip 46. The sealing lip 46 is fitted in a fitting section 41 at an outer peripheral portion of the displacement control valve 1 on a side close to an entrance of the mounting hole 3. The sealing lip 46 has a lip portion 46b abutting on an inner peripheral surface of the mounting hole 3.

Abstract: A displacement control valve is provided for discharging liquid refrigerant in a control chamber at startup and achieves a reduction in startup time and an improvement in operating efficiency during control of a variable displacement compressor simultaneously. The opening area between communicating holes in a third valve section and a third valve seat surface in a control area to control the flow rate or pressure in a working control chamber is set smaller than the area of auxiliary communicating passages.

Abstract: A displacement control valve improved in the function of discharging a liquid refrigerant in a control chamber at startup achieves a reduction in startup time and an improvement in operating efficiency during control of a variable displacement compressor simultaneously. An opening area between a third valve section and a third valve seat surface in a control area to control the flow rate or pressure in a working control chamber is set smaller than an area of an auxiliary communicating passage, thereby reducing the minimum area of a Pc-Ps flow path in the control area.

Abstract: A displacement control valve includes a valve housing, a valve element fitted in a guide passage of the valve housing, and a solenoid for driving the valve element to open and close it, a tapered portion is provided at one of an outer peripheral surface of the valve element and a guide surface of the guide passage, and a spiral groove is provided in the other, wherein the tapered portion is set such that a gap between the valve element and the guide passage is larger toward the low-pressure side than on the high-pressure side, and the tapered portion and the spiral groove are provided such that a starting point of the tapered portion is located within the region of the spiral groove in the entire range between the starting point and the ending point of the stroke of the valve element.

Abstract: The inflow of an external fluid into a mounting hole of a displacement control valve can be prevented, and accumulated gas in the mounting hole due to the permeation leakage of high-pressure gas can be discharged to the outside. A displacement control valve 1 inserted and fitted in a mounting hole 3 provided in a casing of a device controlled in displacement includes a sealing lip 46. The sealing lip 46 is fitted in a fitting section 41 at an outer peripheral portion of the displacement control valve 1 on a side close to an entrance of the mounting hole 3. The sealing lip 46 has a lip portion 46b abutting on an inner peripheral surface of the mounting hole 3.