| 摘要 |
<p>A flow reversing valve comprises: a reversing valve main body 2 adapted to be capable of assuming a first circulatory state in which a first main valve part 10A is in a fully open state and a second main valve part 10B is in a fully closed state and a second circulatory state in which the first main valve part 10A is in a fully closed state and the second main valve part 10B is in a fully open state; and a flow regulating valve 3'adapted to regulate the pressures of the respective back pressure chambers 17A and 17B of the first main valve part 10A and the second main valve part 10B. The flow regulating valve 3 places the reversing valve main body 2 in the first circulatory state by gradually reducing the pressure of the back pressure chamber 17A of the first main valve part 10A, and in the second circulatory state by gradually reducing the pressure of the back pressure chamber 17B of the second main valve part 10B.</p> |
