Anti-freezing module of closed cooling tower

The invention relates to the field of cooling equipment, and discloses a closed cooling tower anti-freezing module which comprises a microcirculation device, the microcirculation device is arranged between the water inlet end and the water outlet end of a condensing coil, and the microcirculation device is used for driving water to circulate in the condensing coil; the anti-freezing solution filling device is arranged on one side of the cooling tower, the anti-freezing solution filling device comprises a bottom plate, an anti-freezing solution box arranged on the bottom plate, a liquid injection pipe communicated with the anti-freezing solution box and the lower end of the condensing coil, and a liquid injection pump arranged in the middle of the liquid injection pipe, and a liquid injection valve is arranged at the water outlet end of the liquid injection pipe; the controller is arranged on the bottom plate, and the microcirculation device and the anti-freezing solution filling device are both electrically c