To provide an expansion valve preventing deviation of a detection characteristic of a power element resulting from attachment of an expansion valve body.
The expansion valve 1A is provided with the expansion valve body part 2 wherein the power element 10 outputting changes of a temperature and a pressure of a refrigerant delivered from an evaporator as change of a diaphragm 14, and a valve part 11 controlling a flow rate of the refrigerant supplied to the evaporator on the basis of the change of the diaphragm 14 are provided integrally, and the valve part 11 of the expansion valve body 2 is attached in a state inserted in a valve attachment hole 7 of a valve case 3. An anti-loosening engagement means 4A is provided on the valve part 11 and the valve case 3, and the anti-loosening engagement means 4A is composed of a collar part 22 protrudedly provided on the valve part 11, a spring holding member 23 fixed to a circumferential rim of a valve attachment hole 7 of the valve case 3, and a ring spring 24 with movement in an axial direction of the valve attachment hole 7 regulated within a certain range by the valve holding member 23, which can be diametrally expanded by spring deformation.
Iwa Saki Kokuni
Akira Kurihara
Kawamata Sumio
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu