"24V DC Cooling Fan" take advantage of the physical characteristics of the "water evaporation absorbs heat," and the air cooling fan. The water rushed through the pump water distribution, water falls evenly from the water distribution in the wet curtain, on the fiber surface to form a wet curtain of water film, "24V DC Cooling Fan" fan out through the air, so that the machine generating a negative pressure, air passes through the soaking wet Lianhou full contact with the water, while the air in the sensible heat is absorbed, so as to achieve "24V DC Cooling Fan" cooling purposes.