Scroll-type compressor

Abstract

To suppress power loss of a scroll-type compressor while suppressing an increase in the number of components of the scroll-type compressor.SOLUTION: An air supply passage 51 is formed in a turning scroll 26, a first end is opened at a tip of a turning spiral wall 26b and can communicate with a compression chamber 27, and a second end communicates with a back pressure chamber 50. An oil return passage 60 has a first passage 61 and a second passage 62. The first passage 61 is formed in a fixed scroll 25, a first end communicates with an oil storage chamber 42, and a second end is opened in a portion which can be in sliding contact with a turning substrate 26a in the fixed scroll 25. The second passage 62 is formed in the turning scroll 26. In the second passage 62, a first end is opened in a portion which can be in sliding contact with the fixed scroll 25 in the turning substrate 26a and can communicate with the first passage 61 through a gap between the fixed scroll 25 and the turning scroll 26, and a second end communicates with the back pressure chamber 50.SELECTED DRAWING: Figure 1

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