Patent ID: 6056202
Filing Date: 2000-05-02
Classification: F25B

Abstract:
An expansion valve comprising:a valve body having a first path for guiding a liquid-phase refrigerant and a second path for guiding a gas-phase refrigerant between an evaporator and a compressor, wherein the first path includes an orifice;a valve that controls the amount of refrigerant passing through said orifice;a power element portion formed on said valve body and having a diaphragm that is displaced due to a difference between pressures applied on the diaphragm by first and second chambers; anda heat sensing shaft for driving said valve, an end of the heat sensing shaft contacting said diaphragm and another end of the heat sensing shaft driving said valve based on displacement of said diaphragm, wherein said heat sensing shaft has a void formed therein and the void is separated from the first and second chambers.