| 摘要 |
PURPOSE:To rapidly form a required differential pressure between a high and low pressure side for a valve and ensure its opening force, by constituting the high pressure valve so as to simultaneously close a high pressure side inlet and outlet port and preventing an inflow of gas in an enclosed vessel to a low pressure side port when a compressor is started. CONSTITUTION:A disc-shaped valve 55 integrally provides a high pressure valve part 55a, having a size able to simultaneously close a high pressure side outlet port 53 and inlet port 54, with a low pressure valve part 55b in an opposite side, and the valve 55, being slidably housed in a casing 51, is continually urged to the high pressure side ports 53, 54 by a bias spring 56. By such constitution, a compressor, closing at the time of its starting the high pressure side inlet port 54 by the high pressure valve part 55a, causes a factor disturbing a pressure drop in a low pressure side port 52 to be generated by a quantity of gas due to leakage in the high pressure side inlet port 54 and the high pressure valve part 55a, performing a very rapid pressure drop as compared with those always communicating with an enclosed vessel 1. In this way, the compressor, rapidly forming a required differential pressure between a high and a low pressure side operating the valve 55, enables its opening force to be ensured.
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