Importance

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Abstract

Provided are a capacity control valve, a variable capacity compressor, and a capacity control system, which control a discharge capacity stably even when a cooling load is small, and reduce the risk of damaging a compressor even in a state when the quantity of a refrigerant is insufficient. The capacity control valve (300) for the variable capacity compressor includes a solenoid unit (300B), a valve body (306) on which the pressure of a discharge chamber (142) of the variable capacity compressor acts in a valve opening direction, and the pressure of a suction pressure area of the variable capacity compressor and the electromagnetic force of the solenoid unit (300B) act in a valve closing direction opposite to the valve opening direction, and a pressure sensitive unit (340) on which the pressure of the discharge chamber (142) acts, and which is connected to the valve body (306) to apply urging force in the valve opening direction on the valve body (306) according to the pressure of the discharge chamber (142) when the pressure of the discharge chamber (142) is lower than a set pressure, and is separated from the valve body (306) when the pressure of the discharge chamber (142) is higher than the set pressure.

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First Claim