| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve energy efficiency by not only preventing degradation in sealability at an outermost engagement part between a fixed scroll and an orbiting scroll, but also suppressing the heating of a working fluid in a suction area. <P>SOLUTION: A scroll compressor includes: a fixed scroll 2, an orbiting scroll which is engaged with the fixed scroll and swivels thereby forming compression chambers 100a, 100b between the orbiting scroll and the fixed scroll; a back pressure chamber for imparting the pressure against the fixed scroll to the orbiting scroll; and an oil feed passage for introducing oil on the discharge side of the compressor to the back pressure chamber. It also includes: a back pressure valve 26 which is communicated with only the back pressure chamber and the compression chamber after starting confinement, and opened/closed by the differential pressure before and after; a compression chamber communication passage 60 for controlling the pressure in the back pressure chamber by allowing the oil in the back pressure chamber to flow into the compression chamber; and a suction area communication passage 65 which is communicated with only the suction area 105 leading to the back pressure chamber and the compression chamber, and feeds the oil in the back pressure chamber to the suction area. <P>COPYRIGHT: (C)2012,JPO&INPIT |
