| 摘要 |
PCT No. PCT/JP96/01410 Sec. 371 Date Jan. 17, 1997 Sec. 102(e) Date Jan. 17, 1997 PCT Filed May 23, 1996 PCT Pub. No. WO96/37707 PCT Pub. Date Nov. 28, 1996An inlet pipe (7) and a discharge pipe (9) of a centrifugal compressor (1) are provided with respective solenoid valves (16, 17) for allowing a flow of fluid in a direction of flow under operation of fluid compression. One end of a bypass pipe (20) is connected to a part of the inlet pipe (7) located between the solenoid valve (16) and an impeller room (6). The other end of the bypass pipe (20) is connected to a part of the discharge pipe (9) located between the impeller room (6) and the solenoid valve (17). The bypass pipe (20) is provided with a solenoid valve (21) which closes under operation of fluid compression of the centrifugal compressor (1) while opening under deactivating operation of the centrifugal compressor (1).
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