Scroll compressor

A scroll compressor comprising:

• a housing;
• a motor provided in the housing;
• a rotary shaft configured to be rotated by the motor;
• an orbiting scroll configured to orbit in conjunction with the rotary shaft;
• and
• a fixed scroll configured to define a plurality compression chambers together with the orbiting scroll,
• wherein the housing comprises:
• a center housing penetrated by the rotary shaft;
• a front housing configured to define a motor accommodation space that accommodates the motor;
• and
• a rear housing configured to define a discharge chamber for accommodating a refrigerant discharged from the plurality of compression chambers, and an introduction chamber for accommodating a middle-pressure refrigerant introduced from an outside of the housing, wherein the fixed scroll has a plurality of injection ports that guides the refrigerant in the introduction chamber to the plurality compression chambers, and wherein when the plurality of injection ports faces an orbiting wrap of the orbiting scroll, at least one of the plurality of injection ports is closed by the orbiting wrap of the orbiting scroll so as not to communicate with the plurality of compression chambers, wherein the plurality of injection ports comprises:
• a first injection port of the plurality of injection ports disposed adjacent to an inner peripheral surface of a fixed wrap of the fixed scroll so as to communicate with a first outer compression chamber of the plurality of compression chambers defined by an outer peripheral surface of the orbiting wrap of the orbiting scroll and the inner peripheral surface of the fixed wrap of the fixed scroll;
• and
• a second injection port of the plurality of injection ports disposed adjacent to an outer peripheral surface of the fixed wrap so as to communicate with a first inner compression chamber of the plurality of compression chambers defined by an inner peripheral surface of the orbiting wrap of the orbiting scroll and the outer peripheral surface of the fixed wrap of the fixed scroll, wherein the first injection port and the second injection port each have a long hole shape, and a length of a minor axis of a first one of the first injection port and the second injection port is shorter than a length of a minor axis of a second one of the first injection port and the second injection port.