| 摘要 |
This refrigeration cycle device comprises: a refrigerant circuit including a compressor, a load-side heat exchanger, a high-pressure-side flow path of an internal heat exchanger, an expansion device, and a heat-source-side heat exchanger; an injection circuit that branches from between the internal heat exchanger and the expansion device, and that is connected to an injection port of the compressor via the expansion device and a low-pressure-side flow path of the internal heat exchanger; an intake temperature sensor that detects the intake temperature of the compressor; an intake pressure detection device that detects the intake pressure of the compressor; a discharge temperature sensor that detects the discharge temperature of the compressor; a discharge pressure sensor that detects the discharge pressure of the compressor; an internal heat exchanger outlet temperature sensor that detects the refrigerant temperature at an outlet of the high-pressure-side flow path of the internal heat exchanger; and a control device that calculates the sub-cooling at an outlet of the load-side heat exchanger by employing the respective detection values of the intake temperature sensor, the intake pressure detection device, the discharge temperature sensor, the discharge pressure sensor, and the internal heat exchanger outlet temperature sensor, and information about the position of the injection port in a compressing unit of the compressor. |
