| 摘要 |
To improve the pressure resistance strength of a pressure-sensing section of a control valve for a internal variable control compressor. In the control valve (1), a stack of snap-acting discs (24) is disposed on a side of a diaphragm (23) forming the pressure-sensing section opposite from a transmitting member (19). With this arrangement, even if the diaphragm (23) receives large suction pressure Ps when the valve is closed, since the snap-acting disc (24) receives suction pressure Ps from the opposite side, the diaphragm (23) is prevented from being broken or deformed. This makes it possible to improve the pressure resistance strength of the pressure-sensing section. As a result, even if the control valve is applied to a refrigeration cycle in which suction pressure Ps becomes high, such as one using carbon dioxide as refrigerant, it is possible to secure sufficient pressure resistance strength.
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