Cooling fan Features: ◆ blinds; high strength galvanized plate, using a unique louvers automatically open device (push pull closing mechanism); ensure fully open and close blinds Weifang chicken cooling fan, under any circumstances to maintain 90 ° Open so blinds reach not choke, wind, rain, dust; ◆ blinds push pull closing mechanism: the excellent toughness industrial nylon injection molding processing, cooling fans, high strength, long life; the guide bar inlaid metal sheets increase the strength of the guide bar Changchun cooling fan, and enhance the reliability and service life of the opening and closing mechanism. Cooling fan cooling principle is: When the fan is running into the cavity negative pressure, so that the outside-air flow through the porous moist wet curtain surface forces the curtain air dry bulb temperature dropped to close to the machine outside air wet bulb temperature, ie Cooler outlet dry bulb temperature is lower than the outdoor dry bulb temperature 5-12 ℃ (dry heat areas up to 15 ℃), the more air is dry and hot, the temperature difference is bigger, the better the cooling effect. Weifang chicken cooling fan, cooling fan, Qingzhou Minhua Qingzhou temperature control equipment supplied by Chinese citizens thermostat plant. Temperature Control Equipment Factory Qingzhou public Hua (www.minhuawenkong.com) (www.minhuawenkong.com) (www.minhuawenkong.com123) strong, credible, Shandong Weifang fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead China and China Qingzhou temperature control equipment and you hand into the brilliant, for a better future!