MULTI-CYLINDER ROTARY COMPRESSOR AND REFRIGERATION CYCLE DEVICE

摘要

In this multi-cylinder rotary compressor (M), a compression mechanism unit (3) is provided with a first cylinder (6A) and a second cylinder (6B) with an intermediate partition plate (2) interposed therebetween. A cylinder chamber (Sa, Sb) that introduces low-pressure gas is formed at the inner diameter section of each cylinder (6A, 6B). Blade back chambers (11a, 11b) are provided that interconnect via a blade groove (10a, 10b) to the cylinder chambers (Sa, Sb). A back-pressure introducing pathway (20) opens from the end surface side of cylinder (6B) to blade back chamber (11b), forming a cylinder operating state wherein high pressure is introduced applying the back pressure of the high pressure to the blade back end causing a compression operation at cylinder chamber (Sb), or wherein low pressure is introduced stopping the compression operation at cylinder chamber (Sb). The outer opening corner (ha) on the side furthest from the rotating shaft of the back-pressure introducing pathway (20) is positioned further to the outer periphery than the end surface corner (bb) of the blade back end positioned in the cylinder operating state.