The working principle of the wet curtain fan is primarily to lower the surrounding environment's temperature through the evaporation of water.‌The wet pad is composed of crinkled paper sheets stacked together, with water flowing evenly over the surface, creating a thin layer of water film. As the fan operates, air passes through the wet pad, with the moisture on its surface absorbing heat from the air, thereby lowering the air temperature. The water pump delivers water to the channels of the wet pad, distributing it uniformly across the surface, while the fan draws in air, passing it through the wet pad to enhance the cooling effect further.