Increase device that large area cooling supplied back water temperature difference

The utility model discloses an increase device that large area cooling supplied back water temperature difference, it includes that compressor (1), condenser (2) that link to each other with compressor (1), stop valve (3) that link to each other with condenser (2), economic ware (4) that link to each other with stop valve (3), choke valve (5) that link to each other with economic ware (4), evaporimeter (6) that link to each other with choke valve (5), evaporimeter (6) link to each other with compressor (1). The regional cooling scale of this device is big, supplies back water temperature difference big, after regional cold supply system uses the device, by the refrigerant further subcooling of economic ware after with the condensation, reduces the production of flash steam, guarantees thethrottle effect, makes the refrigeration efficiency of device improve, supplies with the air conditioner side with the unable cold volume of using in the regional cooling return water pipe network ofconventionality simultaneo