Patent ID: 6425528
Filing Date: 2002-07-30
Classification: B29C,B29L,F25B,Y10T

Abstract:
An expansion valve including an in-built valve unit, said valve unit having the function of a temperature sensing section detecting a degree of refrigerant overheat at an outlet of an evaporator and the function of a valve element controlling a passing amount of high-pressure refrigerant to be adiabatically expanded in accordance with changes of the degree of refrigerant overheat as detected by said temperature sensing section,wherein said valve unit completely is received in an outer pressure vessel formed by moulding resin into a one-piece body by an insert moulding process, and wherein two half shells are interposed between said valve unit and said resin-moulded pressure vessel as a pre-assembled sub-unit containing said valve unit, each of said half shells having a shape forming refrigerant passages communicating with refrigerant passage ports formed by said resin-moulded pressure vessel.