| 摘要 |
PROBLEM TO BE SOLVED: To improve the restriction effect of hunching in an expansion valve. SOLUTION: There is provided a metallic temperature sensitive rod 49 for sensing refrigerant temperature of an evaporator outlet side passage 8, and a first pressure chamber 56 pressure of which is changed in responser to sensed temperature by the temperature sensitive rod 49 and a second pressure chamber 57 into which pressure in the passage 48 is introduced are divided with a diaphragm 52, and a displacement of the diaphragm 52 is transmitted to a valve body 43 through the temperature sensitive rod 49 which disk 43 is in turn displaced. The temperature sensitive rod 49 consists of a small diameter shaft 49a disposed in the passage 48 and a diaphragm stopper 49b couplet with an end of the shaft 49a and making contact with the diaphragm 52, and the passage 48 and the second pressure chamber 57 are communicated through a pressure introduction space 58. There is pressed into the fixed to the temperature sensitive rod 49 a resin-made heat-transfer delaying member 64 which has a thin- walled cylinder 64a covering part of the shaft 49a of the temperature sensitive rod 49 located in the passage 48, a thick-walled cylinder 64b covering part of the shaft 49a located in the pressure introduction space 58, and a thick-walled disk 64c covering ther diaphragm stopper 49b. |
