| 摘要 |
PROBLEM TO BE SOLVED: To provide a displacement changing mechanism of a scroll compressor, which can ensure sealing of bypass passages. SOLUTION: The bypass passages 48, 61e, 61f connect compression chambers 67 in the middle of being reduced in their volume and an intake chamber 69. A valve chamber 45 is connected with valve holes 61e that form parts of the bypass passages 48, 61e, 61f, and a valve seat surface 48a is formed on the periphery of an opening of each valve hole 61e. A valve plate 46 is arranged in the valve chamber 45 to be able to engage with and disengage from the valve seat surfaces 48a. The valve plate 46 can be shiftingly changed by driving of drive means 57, 58, 71-73 between an open position where a front end 46a is separated from the valve seat surfaces 48a to open the valve holes 61e and a close position where the front end 46a is seated on the valve seat surfaces 48a to close the valve holes 61e. COPYRIGHT: (C)2004,JPO&NCIPI
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