| CPC F04C 18/0261 (2013.01) [F04C 2/025 (2013.01); F04C 18/0215 (2013.01); F04C 18/0253 (2013.01); F04C 28/24 (2013.01); F04C 29/128 (2013.01); F04C 23/008 (2013.01)] | 6 Claims |
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1. A scroll compressor, comprising:
a fixed scroll that includes a fixed base plate and a fixed volute wall extending from the fixed base plate; and
an orbiting scroll that includes an orbiting base plate and an orbiting volute wall, the orbiting base plate facing the fixed base plate, and the orbiting volute wall extending from the orbiting base plate toward the fixed base plate and meshing with the fixed volute wall, wherein
the fixed scroll and the orbiting scroll define compression chambers,
the fixed base plate includes a main discharge port at a center of the fixed base plate, the main discharge port discharging a compressed fluid,
at least one of the fixed base plate or the orbiting base plate includes an auxiliary discharge port located at a position different from a position of the main discharge port,
the auxiliary discharge port is configured to discharge fluid in one of the compression chambers when a pressure in the compression chamber becomes greater than or equal to a preset pressure,
the fixed base plate and the orbiting base plate include volute wall forming surfaces provided with the corresponding volute walls,
the volute wall forming surface of the base plate that includes the auxiliary discharge port includes an opening of the auxiliary discharge port, the base plate also including a groove connected to the opening,
the groove is configured to be always connected to one of the compression chambers, and
the groove is configured to be partially covered with the volute wall facing the groove, so that the compression chamber that is in a compression process and is connected to the auxiliary discharge port is not connected to other compression chambers in a compression process or to the compression chamber connected to the main discharge port.
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