Patent ID: 9683767
Date: 2017-06-20
CPC Classifications: F25B

Claim:
1. A cooling system, comprising: a first compressor that compresses refrigerant; a second compressor positioned at a discharge side of the first compressor; an outdoor heat exchanger that receives refrigerant compressed in at least one of the first compressor or the second compressor and preforms heat-exchange of the compressed refrigerant with external air; an expansion device that receives refrigerant condensed in the outdoor heat exchanger and decompresses the condensed refrigerant; a cooling evaporator that receives decompressed from the expansion device and evaporates the decompressed refrigerant to supply cool air to a predetermined space; an injection tube branched from a discharge side of the outdoor heat exchanger, wherein refrigerant that has passed through the outdoor heat exchanger flows into the injection tube; a discharge tube extending to an inlet of the second compressor from an outlet of the first compressor to guide the discharge of the refrigerant compressed in the first compressor, the discharge tube including a tube coupling part to which the injection tube is connected; bypass tube extending from the tube coupling part to a discharge side of the second compressor, that guides refrigerant compressed in the first compressor to the outdoor heat exchanger, bypassing the second compressor; a first valve installed at the discharge tube between the tube coupling part and the inlet of the second compressor, the first valve being configured to open to introduce the refrigerant from the injection tube into the second compressor; and a second valve device installed at the bypass tube, the second valve being configured to open to allow the refrigerant discharged from first compressor to bypass the second compressor.