Scroll compressor containing scroll self-rotation prevention arrangement

A scroll compressor, comprising:

• a casing having a sealed inner space,
• a fixed scroll disposed in the inner space of the casing;
• an orbiting scroll coupled to the fixed scroll to form a compression chamber and configured to orbit with respect to the fixed scroll;
• and
• a main frame configured to support the orbiting scroll, wherein the orbiting scroll comprises:
• an orbiting wrap engaged with the fixed scroll to form the compression chamber;
• and
• an orbiting head plate disposed between the orbiting wrap and the main frame, wherein the orbiting scroll is provided with at least one guide groove and the fixed scroll is provided with at least one self-rotation prevention member which is inserted into the at least one guide groove such that the at least one self-rotation prevention member revolves in the at least one guide groove, wherein the fixed scroll includes a fixed wrap engaged with the orbiting wrap to form the compression chamber and a fixed head plate from which the fixed wrap protrudes, wherein the fixed wrap protrudes from the fixed head plate towards the orbiting head plate, wherein the at least one self-rotation prevention member protrudes in a same direction as a direction in which the fixed wrap protrudes, wherein the orbiting wrap protrudes from the orbiting head plate towards the fixed head plate, wherein the at least one guide groove is formed on a same surface of the orbiting head plate on which the orbiting wrap is formed and is disposed to face the at least one self-rotation prevention member, wherein the at least one guide groove is disposed between the orbiting wrap and an outer circumferential surface of the orbiting head plate, wherein the at least one self-rotation prevention member is disposed at a position at which at least a portion of the at least one self-rotation prevention member is inserted into the at least one guide groove while disposed between the fixed wrap and an outer circumferential surface of the fixed head plate, wherein at least one back-pressure chamber that communicates with the compression chamber is formed at a side of the main frame, which faces the orbiting scroll, wherein the main frame comprises an orbiting scroll supporter disposed to face a surface of the orbiting head plate and configured to support the orbiting scroll and a drive shaft supporter disposed at a center of the orbiting scroll supporter in a radial direction, wherein the at least one back-pressure chamber is concave and is formed at the orbiting scroll supporter, wherein the scroll compressor further comprises a sealing member disposed between the orbiting scroll and the main frame and installed at the at least one back-pressure chamber, wherein the sealing member comprises:
• a contactor disposed between the orbiting head plate and the at least one back-pressure chamber to come into contact with a surface of the orbiting head plate;
• and
• a supporter at least partially inserted into the at least one back-pressure chamber and connected to the contactor, wherein the supporter is a surface that extends in a direction that connects the orbiting head plate and the at least one back-pressure chamber, and the contactor is a surface that extends in parallel with the surface of the orbiting head plate and connects with the supporter, and wherein the sealing member is disposed in the at least one back-pressure chamber so as to move to a position in which the contactor is not in contact with the orbiting head plate and to a position in which the contactor is in contact with the orbiting head plate.