low noise air coolers

The cooling principles is: exhaust air by fan from the unit, then it will be negative pressure inside unit; at the mean while, water is sent to water distributor by pump and sprinkle the surface of wet curtain evenly , and the water will flow directly into the side of air inlet of wet curtain which is designed with special angle; when the hot air passes the surface of wet curtain with water, it will loose considerable heat and get cool, also the air is filtered; finally, the air become cool , comfort and fresh and the remained water will flow to drainage pan and wait for water cycle.