A refrigeration apparatus, comprising:
- a refrigerant circuit including a heat-source-side circuit provided with a compressor and a heat-source-side heat exchanger, and an utilization-side circuit provided with an utilization-side heat exchanger,
- the refrigeration apparatus being capable of executing a cooling operation of performing a refrigeration cycle in the refrigerant circuit with the heat-source-side heat exchanger serving as a radiator and the utilization-side heat exchanger serving as an evaporator, wherein
- the heat-source-side circuit includes
- a liquid side control valve provided for a liquid side pipe in which a refrigerant flows from the heat-source-side heat exchanger toward the utilization-side heat exchanger in the cooling operation,
- a liquid side bypass pipe that allows a portion of the liquid side pipe between the heat-source-side heat exchanger and the liquid side control valve to communicate with a suction side of the compressor,
- a liquid side bypass valve provided for the liquid side bypass pipe,
- a four-way switching valve that switches between a first state in which a discharge pipe of the compressor communicates with the heat-source-side heat exchanger and a suction pipe of the compressor communicates with the utilization-side circuit, and a second state in which the discharge pipe of the compressor communicates with the utilization-side circuit and the suction pipe of the compressor communicates with the heat-source-side heat exchanger,
- a discharge temperature sensor that is provided in a pipe connecting the discharge pipe of the compressor and the four-way switching valve and measures a temperature of a refrigerant discharged from the compressor, and
- a discharge pressure sensor that is provided in a pipe connecting the discharge pipe of the compressor and the four-way switching valve and measures a pressure of a refrigerant discharged from the compressor,
- the refrigeration apparatus further comprises a controller configured to execute, upon receiving a leakage signal indicating a leakage of the refrigerant from the utilization-side circuit, a refrigerant recovery control operation of actuating the compressor with the liquid side control valve closed so that the refrigerant in the utilization-side circuit is recovered in the heat-source-side circuit, and
- the controller is configured to execute, in the refrigerant recovery control operation,
- an operation of calculating a degree of discharge superheat, which is a degree of superheat of a refrigerant discharged from the compressor, by using measurement values of the discharge temperature sensor and the discharge pressure sensor,
- an operation of adjusting an opening degree of the liquid side bypass valve such that the calculated degree of discharge superheat is equal to or more than a predetermined value.