Patent ID: 11885548
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 5:
6. The refrigeration cycle apparatus of claim 1, further comprising:
an oil separator provided between the compressor and the condenser and configured to separate refrigerating machine oil from refrigerant discharged from the compressor;
an oil return pipe that has one end connected to the oil separator and an other end connected to the suction side of the compressor, the oil return pipe being configured to return the refrigerating machine oil separated by the oil separator to the suction side of the compressor; and
an oil branch pipe that has one end connected to the oil return pipe and an other end connected to part of the injection pipe that is located downstream of the second expansion valve,
wherein during the low load operation, the refrigerating machine oil flows into the injection pipe through the oil return pipe and the oil branch pipe.