ROTARY-TYPE ENCLOSED COMPRESSOR AND REFRIGERATION CYCLE APPARATUS

摘要

A vane of a first cylinder (14a) is compressed and urged by a spring member (26). A vane of a second cylinder (14b) is compressed and urged corresponding to a differential pressure between an intra-casing pressure guided into a vane chamber and a suction pressure or discharge pressure guided to the cylinder chamber (14a, 14b). A pressure shift mechanism (K) which guides the suction pressure or discharge pressure has a branch pipe (P1) having a one end connected to a high pressure side of the refrigeration cycle, an other end connected to a suction pipe, and a first on-off valve (28) in a midway portion, and a second on-off valve (29) or a check valve (29A) which is provided in the suction pipe (16b) on a side upstream of a connection portion (D) of the branch pipe and on a side downstream of an oil returning opening (24b) in an accumulator.