Patent ID: 6561433
Filing Date: 2003-05-13
Classification: F25B

Abstract:
A thermal expansion valve comprising:a valve means for changing the opening of a valve hole and thereby controlling the flow of refrigerant traveling to an evaporator in a refrigeration cycle; a housing including an airtight chamber filled with a temperature sensitive gas, the pressure of which changes according to the change in the refrigerant temperature so as to drive said valve means; and a plug welded to and sealing a hole formed to said housing by a weld, thereby airtightly sealing said temperature sensitive gas in said airtight chamber; wherein periphery of the weld is covered by an anaerobic UV cure adhesive having an exterior surface portion spanning between and in contact with the plug and the housing and an inner portion extending between and in contact with the exterior surface portion and the weld and extending between and in contact with the plug and the housing, the exterior surface portion cured by anaerobic UV radiation and the inner portion cured as a result of the anaerobic UV radiation cured exterior surface portion.