Refrigeration apparatus

A refrigeration apparatus including a refrigerant circuit provided with a compression mechanism in which a first compressor with variable operating capacity and a second compressor with fixed operating capacity are connected to each other on a discharge side;

• and with a pilot-type four-way switching valve which is able to switch depending on a differential pressure between a high-pressure port which is connected to the compression mechanism, and which communicates with the discharge side of the compression mechanism, and a low-pressure port communicating with a suction side of the compression mechanism, the refrigeration apparatus comprising:
• a capacity control section for starting the first compressor at a lower operating capacity level when starting thereof;
• a switching valve control section for outputting a switching signal for controlling the four-way switching valve to a predetermined switching state when starting the compression mechanism;
• and
• a switching determination section which, when starting only the first compressor as a start-up of the compression mechanism, performs a determination operation for comparing the differential pressure with a predetermined determination value after the switching signal being outputted by the switching valve control section, and which outputs a low differential pressure signal if the differential pressure falls below the determination value in the determination operation,
• wherein the capacity control section starts the second compressor after the switching determination section outputs the low differential pressure signal.