When the people standing on the beach, the sea breeze blowing gently when feeling particularly cool, this is because the water absorption of heat in the air and evaporates, the air temperature drops, so cool to bring people cold. "Cooling Fan" evaporative air conditioner is based on this natural phenomenon, the natural phenomena and high-tech artificial evaporative cooling technology, developed a new generation of environmentally friendly, energy-saving air-conditioning. In the hot summer environment, air dry / wet bulb temperature vary greatly, so in this case the cooling effect is relatively high. Fresh outdoor air through evaporative cooling air conditioner filter and after a steady stream into the room, and with indoor air, dust, high temperature turbid air from the outdoors, the indoor temperature is reduced, the oxygen content of the air and quality are relatively stable. Therefore, to achieve the dual function of evaporative air cooling and ventilation effect, thus creating a clean and comfortable living and working environment.