Scroll compressor

A scroll compressor, comprising:

• a casing;
• a fixed scroll disposed in the casing;
• an orbiting scroll configured to engage the fixed scroll and define a compression chamber;
• a scroll support member disposed at a side of the orbiting scroll in an axial direction and configured to support the orbiting scroll in the axial direction;
• an anti-rotation pin disposed at one of a side surface of the orbiting scroll or a side surface of the scroll support member facing the side surface of the orbiting scroll;
• a ring insertion groove defined at a side surface of a portion that faces the anti-rotation pin;
• and
• an anti-rotation ring including:
• a ring body portion inserted into the ring insertion groove and configured to rotate relative to the ring insertion groove, and
• a pin coupling portion disposed at the ring body portion and configured to couple the anti-rotation pin,
• wherein the pin coupling portion is offset from a center of the ring body portion, and
• wherein an axial thickness of the ring body portion is smaller than or equal to twice an axial depth of the ring insertion groove,
• wherein an oil separator is disposed outside the casing and configured to separate oil from refrigerant discharged from the casing,
• wherein an oil return pipe connects the oil separator and an inside of the casing, and
• wherein the oil return pipe is connected to the inside of the casing at a position that faces a portion between the orbiting scroll and the scroll support member in a radial direction,
• wherein an oil groove is defined at a side surface of the scroll support member facing the orbiting scroll,
• wherein the oil groove fluidly connects an outer circumferential surface to an inner circumferential surface of the scroll support member, and
• wherein the oil groove includes:
• a plurality of first oil grooves that extend between the outer circumferential surface and the inner circumferential surface of the scroll support member and that are spaced apart from each other along a circumferential direction of the scroll support member, and
• at least one second oil groove that is defined in an annular shape along the circumferential direction of the scroll support member and that is in fluid communication with the plurality of first oil grooves.