| 摘要 |
PROBLEM TO BE SOLVED: To improve response of valve disc to temperature fluctuation of high pressure refrigerant by forming a disc receiver for receiving the valve disc tightly with no rattling in the advancing/retracting direction contiguously to the throttling part of a high pressure refrigerant channel and forming a refrigerant path in the outer circumferential surface at the fitting part. SOLUTION: A throttling part 4 is formed in the way of each refrigerant channel 2, 3 made in a body block 1 and a valve disc 5 is arranged on the upstream side thereof. The valve disc 5 is fitted to a disc receiver 7 formed in the body block 1 contiguously to the throttling part 4 on the upstream side thereof such that the valve disc 5 does not rattle. A plurality of refrigerant paths 5a are made in the outer circumferential surface at the fitting part in order to introduce high pressure refrigerant to the throttling part 4 from the upstream side thereof. Temperature of refrigerant in the refrigerant channel 2 is transmitted through a diaphragm receiving board 6 to a diaphragm 11 in order to vary the pressure in a pressure chamber 13. The diaphragm 11 is displaced depending on the degree of superheating of refrigerant and the position of the valve disc 5 is controlled.
|
