Eagle Industry Co., Ltd.

Masayuki Futakuchi

Kohei Fukudome

Masahiro Hayama

Ryosuke Cho

Hideki Higashidozono

Toshinori Kanzaki

Kenji Moriwaki

Hideki Higashidouzono

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 valveinserted and fitted in a mounting holeprovided in a casing of a device controlled in displacement includes a sealing lip. The sealing lipis fitted in a fitting sectionat an outer peripheral portion of the displacement control valveon a side close to an entrance of the mounting hole. The sealing liphas a lip portionabutting on an inner peripheral surface of the mounting hole

Displacement control valve

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.

In a capacity control valve, a discharged-fluid-receiving part having a diameter that is larger than the diameter of a valve hole interconnecting a first valve chamber and a third valve chamber is provided to the outer periphery section of a third valve part. It is thereby possible to obtain a capacity control valve in which, when the first valve part opens, the discharged-fluid-receiving part receives the pressure of the discharged fluid, the actuation response of the valve body during an opening action is moderated, an excessive increase in the sensitivity to a rise in pressure in the crank chamber caused by a rapid increase in the amount of coolant flowing into the crank chamber is prevented, and the action of the valve body is stable.

Capacity control valve

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.

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.

A capacity control valve capable of enhancing the function of discharging liquid refrigerant in a control chamber during startup of a variable capacity compressor, and improving the control speed of a swash plate during control is provided. The valve has an adapter that has an annular bearing surface and is provided to a free end of a pressure-sensitive body in the elongation and constriction direction, and a valve body for discharging liquid refrigerant, moveably provided inside the adapter. A slit is provided to an engaging part of the adapter with a third valve part, and an introduction hole for causing the control chamber pressure to act on a bottom surface of the valve body for discharging the liquid refrigerant is provided to the base part side, and an urging force is provided whereby the valve body for discharging the liquid refrigerant is urged in a valve-opening direction away from the third valve part.

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Tokyo, Japan

Masayuki Futakuchi