A refrigeration apparatus comprising: a refrigerant circuit including a compressor (31a, 31b, 31c), a heat-source-side heat exchanger, a utilization-side heat exchanger, a liquid refrigerant pipe connecting a liquid end of the heat-source-side heat exchanger to a liquid end of the utilization-side heat exchanger, an injection pipe connecting an intermediate portion of the liquid refrigerant pipe to an intermediate port of the compressor (31a, 31b, 31c), a supercooling heat exchanger connected to the liquid refrigerant pipe and the injection pipe to exchange heat between a refrigerant flowing through the liquid refrigerant pipe and a refrigerant flowing through the injection pipe, a supercooling expansion valve provided on a portion of the injection pipe between the intermediate portion of the liquid refrigerant pipe and the supercooling heat exchanger, and an intermediate expansion valve (36a, 36b, 36c) provided on a portion of the injection pipe between the supercooling heat exchanger and the intermediate port of the compressor (31a, 31b, 31c); comprising a control section configured to perform first and second degree-of-opening adjusting operations in a cooling mode in which the refrigerant circuit performs a refrigeration cycle where the heat-source-side heat exchanger functions as a condenser, the supercooling heat exchanger functions as a supercooler, and the utilization-side heat exchanger functions as an evaporator, a degree of opening of the intermediate expansion valve (36a, 36b, 36c) being adjusted in the first degree-of-opening adjusting operation such that a temperature (Td) of a refrigerant discharged from the compressor (31a, 31b, 31c) is below a predetermined higher discharged refrigerant temperature threshold (Tdth), characterized by a degree of opening of the supercooling expansion valve being adjusted in the second degree-of-opening adjusting operation such that a temperature of a refrigerant flowing through a portion of the injection pipe between the supercooling heat exchanger and the intermediate expansion valve (36a, 36b, 36c) is above a predetermined freezing temperature threshold (Tfth). a refrigerant circuit including a compressor (31a, 31b, 31c), a heat-source-side heat exchanger, a utilization-side heat exchanger, a liquid refrigerant pipe connecting a liquid end of the heat-source-side heat exchanger to a liquid end of the utilization-side heat exchanger, an injection pipe connecting an intermediate portion of the liquid refrigerant pipe to an intermediate port of the compressor (31a, 31b, 31c), a supercooling heat exchanger connected to the liquid refrigerant pipe and the injection pipe to exchange heat between a refrigerant flowing through the liquid refrigerant pipe and a refrigerant flowing through the injection pipe, a supercooling expansion valve provided on a portion of the injection pipe between the intermediate portion of the liquid refrigerant pipe and the supercooling heat exchanger, and an intermediate expansion valve (36a, 36b, 36c) provided on a portion of the injection pipe between the supercooling heat exchanger and the intermediate port of the compressor (31a, 31b, 31c); comprising a control section configured to perform first and second degree-of-opening adjusting operations in a cooling mode in which the refrigerant circuit performs a refrigeration cycle where the heat-source-side heat exchanger functions as a condenser, the supercooling heat exchanger functions as a supercooler, and the utilization-side heat exchanger functions as an evaporator, a degree of opening of the intermediate expansion valve (36a, 36b, 36c) being adjusted in the first degree-of-opening adjusting operation such that a temperature (Td) of a refrigerant discharged from the compressor (31a, 31b, 31c) is below a predetermined higher discharged refrigerant temperature threshold (Tdth), characterized by a degree of opening of the supercooling expansion valve being adjusted in the second degree-of-opening adjusting operation such that a temperature of a refrigerant flowing through a portion of the injection pipe between the supercooling heat exchanger and the intermediate expansion valve (36a, 36b, 36c) is above a predetermined freezing temperature threshold (Tfth).