Patent ID: 7585164
Filing Date: 2009-09-08
Classification: F04C,Y10T

Abstract:
1. A backflow preventing apparatus for a compressor, comprising: a valve housing configured to be disposed between an inner space of a casing of the compressor and a discharge pipe that communicates with the inner space; a valve seat disposed in the valve housing and having a refrigerant passing hole through which the inner space of the casing and the discharge pipe communicate with each other; and a check valve rotatably coupled to the valve seat and configured to open and close the refrigerant passing hole of the valve seat, wherein the valve housing, the valve seat, the check valve, and the discharge pipe are integrally coupled to one another, wherein the check valve has a hinge portion configured to be hinge-coupled to the valve seat at one end thereof, and an opening/closing portion for opening and closing the refrigerant passing hole of the valve seat at another end thereof, the hinge portion positioned above or adjacent to the opening/closing portion, and wherein a valve stopping surface that limits an opened angle of the check valve, by coming into contact with a fixed surface of the valve seat when the check valve is opened, is formed on the hinge portion of the check valve.