| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve such problems that in a scroll compressor controlling back pressure by intermittently communicating a back pressure chamber and a compression chamber, if oil is excessively supplied from a high-pressure region to the back pressure chamber, excessive back pressure is applied to a revolving scroll, which increases a thrust load and causes degradation in the performance or degradation in the reliability. <P>SOLUTION: The pressure in a back pressure chamber 29 is controlled by supplying oil 6 from a high-pressure region 30 to the back pressure chamber 29; and after an aperture end 54b is opened from the high-pressure region 30 to the back pressure chamber, a bypass hole 18a in a compression chamber where a volume ratio is high is opened, thereby, average back pressure can be suppressed. As a result, high efficiency of a scroll compressor is achieved. <P>COPYRIGHT: (C)2013,JPO&INPIT |
