| 摘要 |
<P>PROBLEM TO BE SOLVED: To secure optimum system efficiency and to secure reliability and durability of a compressor by controlling a wide rotational speed range of a compressor to an optimum OCR following rotational speed enhancement of the compressor. <P>SOLUTION: An oil drain hole opening and closing controller 55 is provided having an introduction hole 53 introducing gas/fluid compressed by a compression mechanism to a separation chamber 51, and an oil storage chamber 52 storing lubricating oil separated from the gas/fluid in the separation chamber 51 and an oil drain hole 54 discharging the lubricating oil into the oil storage chamber 52 in a separation chamber lower part, to open and close the oil drain hole. By this, a conventional swirling type lubricating oil separating function is exercised when the oil drain hole 54 is opened, the lubricating oil separating function is intentionally deteriorated when the oil drain hole 54 is closed, OCR is raised, and the rotational speed and reliability of the compressor can be improved. <P>COPYRIGHT: (C)2008,JPO&INPIT |
