JPS5692392A - Rotary compressor - Google Patents

Abstract

PURPOSE: To prevent an overcompression on the high pressure side of a vane, providing a pressure almost close to a suction hole on the low pressure side of the vane, smoothing the motion of the vane and prevent a noise and an oscillation by providing a groove inside an inner wall between the vane and a suction hole.

CONSTITUTION: A groove 27 is provided in the internal wall of a cylinder in such way that a coolant or a lubricant contained in a small volume part of a cylinder internal chamber 29 occupying a space between a discharge port 26 and a vane 25, flows into a tank internal chamber through the discharge port 26 and also flows into the cylinder internal chamber which is a low pressure chamber across the discharge port 26. For reference, 21 represents a cylinder frame and 23 a rotary-type piston. In the meantime, a groove 28 is provided in the internal wall of the cylinder between a vane 25 and a suction port 22. As a result, an overcompression is eliminated on the high pressure side of the vane 25 and a pressure almost close to a suction port 22 is maintained on the low pressure side, so that the motion of the vane 25 is smooth and an abnormal noise and oscillation is prevented.

COPYRIGHT: (C)1981,JPO&Japio