Rotary compressor

Abstract

A rotary compressor has a cylinder having a cylinder chamber formed therein, a roller fitted around an eccentric portion of a drive shaft and rotatably installed within the cylinder chamber, a blade integrally provided on the roller so as to protrude therefrom and dividing the cylinder chamber into a compression chamber and a suction chamber, and a support body swingably provided in the cylinder and having a receiving groove for receiving a tip portion of the blade in such a manner that the tip portion can move back and forth. On axial faces of the blade and a blade protrusion base portion of the roller, there are formed oil grooves one end of which is opened to an inner peripheral surface of the roller and the other end of which is opened to the tip portion of the blade. In addition, on the rear side of the blade at the receiving groove of the support body, a high pressure chamber closed to the outside of the cylinder is formed. With this configuration, the upper and lower end faces of the roller and blade, and sliding contact portions of the blade and the support body supporting the blade can be securely lubricated. Thus, the reliability is improved.

Dependencies are inferred from the claim text.