| 摘要 |
PROBLEM TO BE SOLVED: To prevent an overpressure loss in a cylinder chamber (C2) having a delivery port (48) with a small opening area, in a compression mechanism (20) provided with a plurality of cylinder chambers (C1, C2) having different capacity. SOLUTION: A delivery port (46) with a small opening area out of plural delivery ports (45, 46) is made to serve as a small diameter side delivery port, a delivery port (45) having larger opening area than that of the small diameter side delivery port (46) is made to serve as a large diameter side delivery port, the delivery valve (48) opening/closing the small diameter side delivery port (46) is made to serve as a small diameter side delivery valve, and a delivery valve (47) opening/closing the large diameter side delivery port (45) is made to serve as a large diameter side delivery valve. For example, the small diameter side delivery valve (48) and large diameter side delivery valve (47) are formed to have the same dimension in plate thickness, and the width dimension (W2) of the small diameter side delivery valve (48) is formed smaller than the width dimension (W1) of the large diameter side delivery valve (47). Therefore the rigidity of the small diameter side delivery valve (48) can be reduced lower than that of the large diameter side delivery valve (47). COPYRIGHT: (C)2008,JPO&INPIT
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