Precooling device of refrigerant for single-pump lithium bromide refrigerator

The utility model relates to a precooling device of refrigerant water for a single-pump lithium bromide refrigerator. A U-shaped throttle pipe is horizontally connected with the upper end of a box of a precooling device, a tube of the precooling device of counter-current heat exchange is arranged in the box of the precooling device, an upright overflow pipe is arranged in the box of the pre-cooling device, the lower end of the overflow pipe is penetrated out the bottom part of the box of the precooling device and is connected in a water disk of an evaporator. The device has the advantages that a traditional recycling device of the refrigerant water is canceled, the refrigerant water is completely evaporated under the condition of one circulation rate and the heat of the refrigerant water is absorbed, and the designed requirement of the refrigerating technology is achieved; the utility model also has the advantages of simple structure, equipment simplification and high refrigerating efficiency.