| 摘要 |
Provided is a heat pump which uses an oil separator to recover oil in a refrigerant discharged from compressors, and uses an oil return flow path to return the recovered oil to the compressors, wherein abnormalities in the oil return flow path are detected early and with high accuracy. This heat pump (10) is provided with: compressors (16A, 16B) which discharge a refrigerant; an oil separator (30) which separates oil from the refrigerant discharged from the compressors; an oil return flow path (80) which returns, to the compressors, the oil separated by the oil separator; pressure sensors (86A, 86B) for detecting pressures inside the oil return flow path; first pressure loss members (84A, 84B) and second pressure loss members (88A, 88B) provided to sections of the oil return flow path which are located at the oil-separator side and the compressor side of the pressure sensors; and a control device which increases the outputs of the compressors in cases when the pressures detected by the pressure sensors exceed the intake pressures of the compressors, but are less than the discharge pressures of the compressors. |
