A rotary compressor that is used for rotary compressor's compressing mechanism and has it

The utility model discloses a rotary compressor that is used for rotary compressor's compressing mechanism and has it, the compressing mechanism includes cylinder components, base bearing and supplementary bearing. Cylinder components includes the cylinder, and the cylinder has the working chamber, and does not set up the discharge incision on the cylinder, base bearing and supplementary bearing are established respectively at cylinder components's axial both ends, are formed with the exhaust port with the working chamber intercommunication in base bearing and the supplementary bearing at least one. The volume of working chamber is V, and the projected area of exhaust port in the working chamber and outside the working chamber is S1, S2 respectively, and wherein V, S1, S2 satisfy: 300mm