"220V Cooling Fan" in the design, the design of the cooling fan in addition to the previous mentioned universal design. There are also some cooling fan with some very special design. Better meet the needs of users through the application of technology and process updates . "220V Cooling Fan" in the dust, long-term use of air flow through the various parts of the city covered with a thick layer of dust leading to poor Merry Increased blade weight. Reduce speed or increase the electrical load. Even cause "220V Cooling Fan"is damaged. For this reason some fan manufacturers in the dust also style all their own. For example, some of the market vendors "Dust Network" fan mounted on the outside, but must be cleaned regularly, otherwise blocking cold air filter will cause unnecessary trouble cooling.