| 摘要 |
PROBLEM TO BE SOLVED: To solve problems wherein inconvenience that difference between pressure at an outlet position of a compressor unit and pressure of a pressure display means becomes too large to be negligible occurs at operation time for reducing discharge pressure of the compressor unit and increasing amount of discharge air if the pressure display means is provided on the upstream side of a check valve and whether pressure remaining in the inside of the compressor unit is properly radiated when the compressor stops or not cannot be confirmed because pressure on the downstream side of the check valve is displayed even when the compressor stops if the pressure display means is provided on the downstream side of the check valve. SOLUTION: Pressure on the downstream side of the check valve is displayed during operation of the compressor unit and pressure on the upstream side of the check valve is displayed during stop of the compressor unit by the pressure display means. COPYRIGHT: (C)2007,JPO&INPIT
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