Patent Number: 6,293,472

Title: Expansion valve

Abstract: A power element portion 36' mounted on the upper portion of an expansion valve body comprises an upper cover 36d and a lower cover 36h, and is divided into an upper pressure chamber 36b and a lower pressure chamber 36c by a diaphragm 36a. A heat sensing drive shaft 101 is formed of a large radius portion 105 and a heat conducting shaft 103 integrally formed thereto. The stopper portion 104 contacting the lower surface of the diaphragm 36a is a member which is formed separately from the heat sensing drive shaft 101, and supported within the lower cover 36h. When the expansion valve is taken apart, the heat sensing drive shaft 101 is pulled out from the inside of the mounting seat 362 of the power element portion 36', and the refrigerant remaining inside the upper pressure chamber 36b is taken out and collected from the side of the diaphragm.

Inventors: Yano; Masamichi (Tokyo, JP)

Assignee: Fujikoki Corporation

International Classification: F25B 41/06 (20060101); G05D 23/12 (20060101); G05D 23/01 (20060101); F25B 041/04 ()

Expiration Date: 09/25/2018