Scroll compressor

A scroll compressor comprising:

• a fixed scroll including a first end plate and a first wrap located on the first end plate;
• an orbiting scroll including a second end plate and a second wrap located on a first surface of the second end plate that faces the fixed scroll, the orbiting scroll being disposed to define a compression chamber to compress refrigerant between the first wrap and the second wrap and orbiting relative to the fixed scroll;
• a frame facing a second surface opposite the first surface in the orbiting scroll and supporting a load on the orbiting scroll during compression of refrigerant gas;
• and
• a hermetic container containing the fixed scroll, the orbiting scroll, and the frame and including an oil sump in which refrigerating machine oil is held,
• the scroll compressor being configured to suck the refrigerant gas into the hermetic container and then compress the refrigerant gas in the compression chamber,
• the second end plate having
• an annular groove having an opening that opens into the second surface and serving as a back-pressure chamber with the opening being closed by the frame,
• a gas communication path through which the groove communicates with the compression chamber in which the refrigerant gas is being compressed, and
• a first oil supply passage having a first opening that opens into at least one of a region inside the groove and a region outside the groove in the second surface and through which the refrigerating machine oil is supplied to a gap between the second surface and the frame,
• the scroll compressor further comprising
• a motor contained in the hermetic container;
• and
• a rotating shaft contained in the hermetic container, the rotating shaft including a main shaft portion connected to the motor and an eccentric shaft portion having an axis eccentric with respect to an axis of the main shaft portion,
• wherein the orbiting scroll includes a boss located on the second surface of the second end plate and the boss supports the eccentric shaft portion such that the eccentric shaft portion is rotatable, and
• wherein a minimum distance between the first opening and the groove is less than or equal to a distance between the axis of the main shaft portion and the axis of the eccentric shaft portion.