Evaporative coolers (also known as eco-air conditioners, evaporative water-cooled air conditioners, cooling fans, air coolers, and water-cooled air conditioners) are a comprehensive evaporative cooling and air exchange unit that combines cooling, air exchange, dust prevention, and odor removal. Eco-air conditioners, in addition to bringing fresh air and lowering temperatures to industrial workshops and public spaces, have the key feature of energy-saving and environmental protection! They are a new eco-friendly product that does not use compressors, refrigerants, or copper pipes. The evaporative cooler operates on the principle of water evaporation, using a physical method to achieve cooling and solving the issue of excessive "Freon" emissions from traditional air conditioners. It utilizes a wet pad as the cooling medium, with water flowing evenly down the wavy surface of the wet pad from top to bottom, ensuring the wet pad is uniformly moistened. When the fan draws air, it creates pressure, forcing unsaturated air to pass through the porous, moistened wet pad surface. This converts a large amount of air moisture into latent heat, causing the indoor air to drop from dry bulb temperature to near wet bulb temperature, increasing air humidity. This transforms dry, hot air into clean, cool air, thereby achieving the effects of cooling and humidifying.