| 摘要 |
The present invention relates to a compressor. The compressor according to the present invention includes a cylinder which has an outer cylinder part, an inner cylinder part and a vane part for connecting the outer cylinder part and the inner cylinder part with each other and is fixed to a casing. Moreover, a rolling piston is connected to the vane part to be able to slide in order to form an outer compression space and an inner compression space while carrying out a turning motion between the outer cylinder part and the inner cylinder part. Therefore, the compressor can reduce power loss in comparison with the same cooling capacity by reducing weight of a rotor, can reduce refrigerant leak because a bearing area is narrow, and can easily expand and change capacity of the cylinder. Furthermore, the compressor can reduce vibration and noise because refrigerants in each of the compression spaces are discharged in the opposite directions. Additionally, because a back pressure groove is formed in the upper side of an operation transferring part of a rolling piston, the compressor can reduce a friction area between the rolling piston and the upper bearing and can reduce friction loss between the rolling piston and the upper bearing by oil filling the back pressure groove. |
