Patent ID: 7044723

Claim:
A scroll compressor comprising a refrigerant compressing section being formed with a compression chamber therein by engaging spiral scroll wraps erected on end plates of a fixed scroll and an orbiting scroll with each other, and a motor for driving said refrigerant compressing section are provided in a closed shell; a space between the end plate back surface of said orbiting scroll and a main frame is divided into a high-pressure space on the inside diameter side of a thrust ring and a low-pressure space on the outside diameter side thereof by said thrust ring that is in slidable contact with the end plate back surface of said orbiting scroll, and said low-pressure space communicates with a suction space at the outer periphery of wrap; and oil supply means is provided to introduce lubricating oil in the bottom portion of said closed shell to said high-pressure space, wherein said main frame includes an oil supply passage, in which a suction port at one end thereof is opened to said high-pressure space, and a discharge port at the other end thereof is opened to said low-pressure space or a suction chamber which is located on the outside of the scroll wraps and communicates with said low-pressure space, and a throttle pin, which is arranged in said oil supply passage with a predetermined clearance.