| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotary compressor of a so-called internal intermediate pressure type multistage compression type having a structure wherein back pressure is applied to a vane of a second rotary compression element without trouble. SOLUTION: The rotary compressor comprises, in a hermetic container, an electric element, and a first and the second rotary compression element 32 and 34 driven by the electric element. A roller is fitted between a cylinder 38 constituting the second rotary compression element 34 and an eccentric portion formed on a rotary shaft 16 of the electric element so as to rotate eccentrically in the cylinder 38, an upper support member 54 is disposed to close an open face of the cylinder 38, the vane is brought in contact with the roller to divide the cylinder 38 into a low pressure chamber and a high pressure chamber, and a back pressure chamber is defined to apply back pressure to the vane. The upper support member 54 has a back pressure passage 72 interconnecting the high pressure chamber in the cylinder 38 and the back pressure chamber. COPYRIGHT: (C)2003,JPO
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