| 摘要 |
The invention aims to improve the efficiency of a compressor in a two-stage compressor which connects a low-stage compression part and a high-stage compression part in series. An opening area ratio S1/S2 between an opening area S1 of a low-stage exhaust opening (16) of the low-stage compression part (10) and a high-stage exhaust opening (36) of the high-stage compression part (30) is set to 1<S1/S2<=2.25. Additionally, a lifting amount ratio H1/H2 between a lifting amount H1 of a low-stage exhaust valve (17) at the low-stage exhaust opening (16) and a lifting amount H2 of the high-stage exhaust opening (36) at the high-stage exhaust opening (36) is set to 1<H1/H2<=2.1. Additionally, when ejection is performed, the ratio H1/H2 is set to 0.47<=H1/H2<1. |
