Patent ID: 6883346

Claim:
A refrigerating apparatus wherein compression mechanisms of a refrigerant circuit having application-side heat exchangers of a plurality of systems are formed by combining three compressors, a four-way switch valve is connected to the suction sides of the compression mechanisms, and the four-way switch valve can switch between a first state where a first port is communicated with a second port and a third port is communicated with a fourth port and a second state where the first port is communicated with the fourth port and the second port is communicated with the third port, comprising: a branch pipe of a suction pipe of a first compressor is connected to the first port through a check valve for permitting a flow of a refrigerant directed to the first port; a suction pipe of a second compressor is connected to the second port; a branch pipe of a suction pipe of a third compressor is connected to the third port through the check valve for permitting the flow of a refrigerant directed to the third port; and a high-pressure side pipe of the refrigerant circuit is connected to the fourth port.