Compressor unit and refrigeration apparatus

A compressor unit comprising:

• a first case;
• a first compressor accommodated in the first case;
• a cascade heat exchanger accommodated in the first case;
• a second compressor accommodated in the first case;
• a first connecting port;
• and
• a second connecting port,
• wherein
• the first compressor, the cascade heat exchanger, and a heat source heat exchanger accommodated in a second case provided separately from the first case constitute a first refrigerant cycle adopting the heat source heat exchanger as a heat source and configured to cause circulation of a first refrigerant,
• the second co mpressor, the cascade heat exchanger, and a utilization heat exchanger accommodated in a third case provided separately from the first case constitute a second refrigerant cycle adopting the cascade heat exchanger as a heat source and configured to cause circulation of a second refrigerant,
• the cascade heat exchanger exchanges heat between the first refrigerant and the second refrigerant,
• the first connecting port is connected to the heat source heat exchanger via a first connection piping, and
• the second connecting port is connected to the utilization heat exchanger via a second connection piping.