摘要:
[PROBLEMS] To provide a small-sized control valve in which a pressure introduced into a pressure-sensitive part can control a valve opening according to the small change of thrust by a solenoid.[MEANS FOR SOLVING THE PROBLEMS] This control valve (28) includes a diaphragm assembly (64) imparting a biasing force to a moving member (50) according to the pressure introduced into the pressure-sensitive part (40). The moving member (50) is moved by the biasing force to control the valve opening. The control valve further includes a solenoid part (36) which imparts the thrust of the diaphragm assembly (64) produced according to the pressure introduced into the pressure-sensitive part (40) to the moving member (50) through a diaphragm holding body (66) as a biasing force, and imparts a biasing force capable of controlling the valve opening in cooperation with the afore-said biasing force to the moving member (50).
摘要:
A control valve for a variable displacement compressor, in which the discharge pressure of the compressor introduced into a pressure sensing section applies urging force to a movement member, and a solenoid section applies, in cooperation with the urging force, urging force to the movement member depending on an input signal. The degree of opening of a valve body provided at the movement member is set according to the position of the movement member to regulate the rate of air flow in a communication path for interconnecting a discharge pressure region of the compressor and a compressor inner chamber. The suction pressure of the compressor is introduced into a control valve to apply urging force to the movement member, and communication between fluid having the discharge pressure introduced into the pressure sensing section and fluid having the suction pressure introduced into the control valve is shut off.
摘要:
A control valve includes a diaphragm assembly imparting a biasing force to a moving member according to the pressure introduced into the pressure-sensitive part. The moving member is moved by the biasing force to control the valve opening. The control valve further includes a solenoid part which imparts the thrust of the diaphragm assembly produced according to the pressure introduced into the pressure-sensitive part to the moving member through a diaphragm holding body as a biasing force, and imparts a biasing force capable of controlling the valve opening in cooperation with the afore-said biasing force to the moving member.
摘要:
[Problems] A control valve for a variable displacement compressor, where sliding resistance by movement of a valve is reduced as much as possible to stably and accurately regulate the rate of air flow, enabling a suction pressure corresponding to solenoid thrust to be maintained.[Means for Solving Problems] The discharge pressure Pd of the compressor introduced into a pressure sensing section (40) applies urging force to a movement member (50), and a solenoid section (36) applies, in cooperation with the urging force, urging force to the movement member (50) depending on an input signal. The degree of opening of a valve body (56) provided at the movement member (50) is set according to the position of the movement member (50) to regulate the rate of air flow in a communication path for interconnecting a discharge pressure region of the compressor and a compressor inner chamber. The suction pressure Ps of the compressor is introduced into a control valve to apply urging force to the movement member (50), and communication between fluid having the discharge pressure Pd introduced into the pressure sensing section (40) and fluid having the suction pressure Ps introduced into the control valve is shut off.
摘要:
A capacity control valve for a variable-capacity compressor such as used in an air-conditioning system in a motor vehicle is provided, wherein foreign matter is prevented from being caught in the sliding parts and leakage on the sliding parts is prevented from occurring by configuring the capacity control valve so that there are no sliding parts between the valving element and the housing (valve body). The valve includes a bellows-type valve that includes a bellows and a fixing bracket joined in an airtight manner to an end of the bellows. The fixing bracket is fixed in an airtight manner to a valve body between a first valve chamber and a suction port.
摘要:
A capacity control valve for increasing the ability to drain liquid refrigerant from a control chamber during startup of a variable-capacity compressor without changing the control valve characteristics has a spring acting in the direction of valve opening provided between an adapter and a free end of a pressure-sensitive body in the extension and contraction direction thereof and having an annular seat surface, and a third valve part having an annular engaging surface for opening and closing a suction-side passage by engaging and disengaging with the seat surface of the adapter.
摘要:
A selector valve, comprising a valve chamber having a first valve seat and a second valve seat facing the first valve seat, a first fluid passage communicating with a first valve port on the periphery of the first valve seat of the valve chamber to flow a first working fluid therein, a second fluid passage communicating with the valve chamber to flow the working fluid therefrom or therein, a third fluid passage communicating with a second valve port on the periphery of the second valve seat of the valve chamber to flow the working fluid therefrom, a valve element disposed in the valve chamber and alternately separating from and coming into contact with the first valve seat and the second valve seat, a stem part connected to the valve element, a guide hole movably guiding the valve stem, a storage chamber for a seal means installed around the guide hole, an auxiliary passage allowing the storage chamber to communicate with the first fluid passage, and a solenoid part connected to the stem part for operating a solenoid rod. A first pressure receiving area formed by the first valve seat and the valve element joined to each other to receive the pressure of the first working fluid is set approximately the same as the third pressure receiving area of the stem part receiving the first working fluid in the storage chamber.
摘要:
A capacity control valve of the present invention includes a communication path (31) through which a discharge chamber (11) and a control chamber (12) are allowed to communicate with each other; a valve chamber (36) in the middle of the communication path (31); communication paths (32, 31b) through which a suction chamber (13) and the control chamber (12) are allowed to communicate with each other; a valve chamber (36) in the middle of the communication path (32); a valve body (40) including a first valve part (41) that opens and closes the communication path (31) and a second valve part (42) that opens and closes the communication path (32), the first and second valve parts being placed in the valve chamber (36) and performing the opening and closing operation in a manner opposite to each other; and a solenoid (60) for moving the valve body (40). The valve body (40) has a pressure receiving part (44) at its end that is across the second valve part (42) from the first valve part (41), and the pressure receiving part (44) receives a control-chamber pressure. The pressure receiving area (S3) of the pressure receiving part (44) is substantially the same as the difference between the pressure receiving area (S2) of the second valve part (42) and the pressure receiving area (S1) of the first valve part. Thereby, the valve is reduced in size, an influence of the pressure in the control chamber is minimized, and stable capacity control with excellent response is enabled.
摘要:
A seal structure sealing a fitted part between the guide surface of a bearing part and a shaft part to prevent a fluid from flowing in a direction from a high-pressure fluid side to a low-pressure fluid side. The seal structure comprises a seal ring storage part having a radial contact surface surrounding the shaft part which is formed on the high-pressure fluid side of the bearing part and a seal ring disposed in the seal ring storage part, allowing its side surface facing the contact surface to come into contact with the contact surface, and allowing its inner peripheral surface to be fitted to the outer peripheral surface of the shaft part. The seal ring is formed in such a relative dimension that, even if elastically deformed by the pressure of the sealed fluid, the elastically deformed expanded portion thereof is not brought into contact with the peripheral surface of the seal ring storage part.
摘要:
A capacity control valve for a variable-capacity compressor such as used in an air-conditioning system in a motor vehicle is provided, wherein foreign matter is prevented from being caught in the sliding parts and leakage on the sliding parts is prevented from occurring by configuring the capacity control valve so that there are no sliding parts between the valving element and the housing (valve body).