| 摘要 |
PROBLEM TO BE SOLVED: To increase volume efficiency and compressor efficiency by reducing the leaked amount of a refrigerant due to a change in pressure difference between the compression elements of a two-stage compressor. SOLUTION: In this rotary two-stage compressor, an electric motor 14 is stored in a closed container 13. The compressor comprises a rotating compressive element formed by stacking low pressure compressive elements 20a and high pressure compressive elements 20b in a stacked state and an auxiliary bearing 19 supporting a rotating shaft 2. Each of the low pressure compressive element 20a and high pressure compressive element 20b comprises a cylindrical cylinder 10, a cylindrical roller 11 eccentrically rotating along the inner wall of the cylinder 10, and flat-plate like vanes 18 partitioning a space partitioned by the outer periphery of the roller 11 and the inner wall of the cylinder 10. An angle between the vanes 18 of the low pressure compressive element 20a and a position where a clearance between the inner wall of the cylinder 10 and the outer periphery of the roller becomes minimum is 150 to 210°. COPYRIGHT: (C)2005,JPO&NCIPI
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