Our revolving evaporative air cooler can trap the dust and particles in the air. The pad of the machine will never have stoppage and can keep working in a high efficiency to making a comfortable working environment. The YDM revolving evaporative air cooler is a new product of our company. It resolves the problem of pad stoppage. As in the traditional fixed pad air cooler, when the outside air through the wet pad, the dust and other particles are trapped on the pad. And usually after 1 - 2 years, it will be blocked and the efficiency of the machine will be reduced. Thus the pads need to be replaced every season or two, which generally cost s USD20 to USD40 for a set. With our two patents, the revolving pad mandrel and the high strength composite pad using in the machine, when the machine is working, the water keep spray onto the pad while the pad keep revolving. When the dust and other particles trapped on the pad, they will be washed by the water. Since the pads are continually wetted, trapped particles are flushed out and trapped in the bottom of the cooler. Applications: 1) Spin, mechanism, chinaware, fine chemicals, metallurgy, hardware, and leather industries 2) Galvanization, electron, shoemaking, printing and dyeing, plastic, clothing industry, press, packaging, foodstuff industries 3) Diagnostics library, school, waiting room, supermarket, washhouse 4) Kitchen, food market, casino, underground park, station 5) Greenhouse, flower, poultry and animal farms