Cooling-water machine with high temperature control precision

The utility model discloses a cooling-water machine with high temperature control precision, which comprises a refrigeration device, a cooling device, a cooling device and a control device, and is characterized in that the refrigeration device comprises an evaporator used for reducing the cooling water temperature; the cold water circulating device comprises a water tank, a first water conveying pipe and a water return pipe, the water tank is used for receiving cooling water discharged by the evaporator, the first water conveying pipe is communicated with the water tank and water utilization equipment, and the water return pipe is communicated with the water utilization equipment and the evaporator; the temperature control device comprises a heat exchange pipe, a flow dividing pipe and a second water conveying pipe, the heat exchange pipe is arranged in the water tank, the heat exchange pipe is communicated with the flow dividing pipe and the second water conveying pipe, the flow dividing pipe is communicated