Scroll compressor

A scroll compressor comprising:

• a fixed scroll having a first base plate in which a discharge port through which refrigerant is discharged is formed, and a first scroll wrap provided on a first face of the first base plate;
• and
• an orbiting scroll having a second base plate, and a second scroll wrap provided on a face of the second base plate that faces the fixed scroll, and configured to orbit eccentrically to the fixed scroll, the first scroll wrap and the second scroll wrap being combined with each other and defining compression chambers,
• the first base plate having
• an injection-pipe connection port to which an injection pipe is connected,
• a first injection hole that passes through the first base plate, and communicates with one of the compression chambers before the one of the compression chambers communicates with the discharge port,
• a communication hole that communicates with the injection-pipe connection port and the first injection hole,
• at least one second injection hole that passes through the first base plate, and communicates with the one of the compression chambers with which the first injection hole communicates, and
• a groove that is formed in a second face that is a face opposite to the first face, and communicates with the first injection hole and the at least one second injection hole,
• the scroll compressor being configured to inject, through the first injection hole and the at least one second injection hole, refrigerant supplied to the injection-pipe connection port into the one of the compression chambers before the one of the compression chambers communicates with the discharge port, wherein
• a distal end of the second scroll wrap has a tip seal,
• D denotes a diameter of the first injection hole,
• W denotes a tooth width of the second scroll wrap,
• T denotes a width of the tip seal, and
• the diameter of the first injection hole is set such that D={(W−T)/2}+T.