Patent ID: 8713963

Claim:
A vapor compression circuit comprising: a compressor, a condenser, a flash tank economizer, an expansion device and an evaporator connected in a closed refrigeration loop; the flash tank economizer being configured to receive refrigerant from the condenser, the flash tank economizer being operable to vaporize a portion of the refrigerant from the condenser and provide the vaporized refrigerant to the compressor; and a heat exchanger intermediate the flash tank economizer and the evaporator, liquid refrigerant leaving the flash tank economizer is split into a first stream and a second stream, the first stream and the second stream are directed to different sides of the heat exchanger such that the first stream enters into a heat exchange relationship with the second stream to subcool the second stream prior to the second stream being provided to the evaporator and prior to the first stream being provided to the compressor.