| 摘要 |
PROBLEM TO BE SOLVED: To obtain a multistage compression type rotary compressor, in which a failure such as breaking of a discharge valve of a second rotary compression element to be caused by differential pressure in the secondary stage is prevented from occurring. SOLUTION: In a cover 66 of the rotary compressor, there is provided a communication path 200 allowing the inside of a sealed vessel 12 to communicate with a discharge-noise muffling chamber 62 of the secondary rotation compression element 34. When differential pressure of an intermittent pressure between the refrigerant discharge side of the element 34 and the inside of the sealed vessel 12 has reached at least an upper limit, a valve element 207 provided in a communication path 200 allows the inside of the sealed vessel 12 to communicate with the noise-muffling chamber 62. COPYRIGHT: (C)2003,JPO
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