Patent ID: 6612503
Filing Date: 2003-09-02
Classification: F25B

Abstract:
An expansion valve that has a first passage for adiabatically expanding high-pressure refrigerant introduced therein to deliver the refrigerant to an evaporator, and a second passage through which refrigerant from the evaporator passes, formed in the same body block,characterized by comprising: a valve element arranged in a manner opposed to a valve seat formed in an intermediate portion of the first passage; a power element for urging the valve element in directions of moving to and moving away from the valve seat according to a temperature and pressure of refrigerant in the second passage; a compression coil spring for urging the valve element toward the valve seat; and a pressure sensor that is screwed into an opening of the body block, the opening being formed to communicate with a side of the first passage where the high-pressure refrigerant is introduced, such that the pressure sensor receives a fixed end of the compression coil spring on a side opposite to the valve element, for sensing pressure of the introduced high-pressure refrigerant, wherein the compression coil spring has load thereon adjusted by an amount of screwing of the pressure sensor.