Many evaporative "Small Cooling Fan" is mainly between the product between air conditioning and fan, no air conditioning so cold wind blowing out, go over the fan blowing out cool, the equivalent of people standing on the beach as cool and comfortable. Second is an investment, low operating cost, while addressing ventilation, cooling correct, but no need to worry about long-term stay inside easy to get air sick, they do not poly big upset electricity for cooling fan is concerned, "Small cooling Fan"The main principle is to use the design heat absorbing evaporation of water, the use of water from the action of the air in the liquid state into a gaseous state during the heat absorption, to reduce the air temperature. The core components of direct evaporative heat exchanger - "multi-layer corrugated fiber composite materials" wet curtain. When outdoor air into the energy saving air conditioners, constantly circulating water to wash through the "multi-layer corrugated fiber composite materials" wet curtain formed due to water evaporation process is constantly absorbing heat in the air, so that the "Small cooling Fan "fresh air temperature decreases, after cooling duct and fresh air through vents designed into the room, adjust the indoor temperature. While outdoor air in through the air conditioner "multi-layer corrugated fiber composite materials" wet curtain, due to a certain percentage of water vapor mixed with air, so fresh air into the room to increase the humidity of the air in the room.