Scroll compressor

A scroll compressor comprising:

• a main body;
• a cover configured to divide an inside of the main body into a low pressure section and a high pressure section;
• a fixed scroll disposed in the low pressure section and including a first discharge port;
• an orbiting scroll configured to rotate with respect to the fixed scroll;
• a compression chamber formed by the fixed scroll and the orbiting scroll to compress refrigerant therein;
• a discharge guide disposed between the fixed scroll and the cover, the discharge guide including a second discharge port and selectively communicating the second discharge port with the first discharge port to discharge the compressed refrigerant in the compression chamber to the cover;
• a back pressure actuator disposed to surround an outer circumferential surface of the discharge guide to form a back pressure chamber together with the discharge guide and configured to move in a direction toward the cover with respect to the discharge guide to selectively connect the second discharge port with the high pressure section;
• and
• a sealer disposed between the back pressure actuator and the discharge guide, and configured to selectively open or close a gap between the back pressure actuator and the discharge guide, the sealer including a seal having a refrigerant flow path and an O-ring coupled to an outer circumferential surface of the seal to selectively open or close the refrigerant flow path.