| 摘要 |
The invention provides a thermal expansion valve for a car air conditioner, which prevents a hunting phenomenon. The thermal expansion valve is provided wiht a refrigerant passage (63) from an evaporator (515) toward a compressor (511) formed in an inner portion thereof and a temperature sensing and pressure transmitting member (100) having a heat sensing function and forming a hollow portion (84) in an inner portion thereof, which is installed in the passage (63). In the thermal expansion valve, a distal end of the hollow portion (84) of the temperature sensing and pressure transmitting member (100) is fixed to a center opening portion of a diaphragm (82) constituting a power element portion (80) for driving the temperature sensing and pressure transmitting member (100), an upper pressure chamber (83) within the power element portion (80) formed by the diaphragm (82) and the hollow portion (84) are communicated with each other so as to form a sealed space (83a) having a working fluid charged therein, and a thermal-transfer delay means (140) is provided between a heat ballast member (40) received in the hollow portion (84) and an inner wall of the hollow portion (84). <IMAGE> |
