Air cooler

Four supporting columns are installed at the four corner ends between a top cover and a base respectively, a first driving motor is installed in the center of the bottom of the top cover, a liquid guide disc is installed at the output end of the bottom of the first driving motor, and spraying pipes are installed on the front side, the rear side, the left side and the right side of the bottom of the liquid guide disc. The liquid guide disc is hollow and is communicated with the interiors of the multiple spraying pipes, a butt joint pipe is installed in the center of the bottom of the liquid guide disc, a liquid guide pipe is rotationally in butt joint with the interior of the butt joint pipe, the bottom end of the liquid guide pipe is in butt joint with the liquid outlet end of an infusion pump arranged below, and cooling plates are installed on the inner sides between the adjacent supporting columns. According to the air cooling device, the mist spray heads on the multiple spray pipes rotate to spray water to