| 摘要 |
PROBLEM TO BE SOLVED: To reduce a cost and stabilize a quality by improving the flow controlling function of a refrigerant whose flow direction upon cooling and heating is different, and by decreasing the number of part items while eliminating a complicated structure, further, and also to eliminate the risk such as the blocking of a passage by restraining the use of a capillary tube. SOLUTION: A tubular valve body 16 is provided at the inner diameter side of the same with a projected stopper 13 and a valve seat 14 while provided at both ends of the same with valve units 15, 15', and is inserted into one side of the opening of a tubular flow passage 12 provided in a main body so that the valve unit 15 is opposed to the valve seat 14. Thereafter, a collar 17 provided with a stopper 13' for regulating the moving range of the valve body 16 and a valve seat 14' opposed to the valve unit 15' is inserted into the other opening of the flow passage 12, then, the collar is fixed by a stop ring 18. In this case, the valve body 16 is provided with a vane 19. The vane 19 secures a flow passage 20 between the inner diameter of the flow passage 12 and the valve body 16, and regulates the moving range of the valve body by abutting against the stopper 13 or a stopper 13' at the downstream side of the valve body 16, when the valve body 16 is moved by the change of flow direction of the refrigerant whereby a distance between the valve unit and the valve seat is kept constant.
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