24V DC Cooling Fan cabinet

"24V DC Cooling Fan", the fan has a long history. China in BC for many years had been to create a simple wooden windmill hulling, its action principle is basically the same with modern centrifugal fan. In 1862, "iphone下载雷竞技 " centrifugal fan British Guyana Bell invented, its impeller, housing concentric type chassis with brick, wood backward straight blade impeller, the efficiency is only about 40%, mainly for mine ventilation. In 1880, it devised volute casing "iphone下载雷竞技 " for mine blast in row, and backward curved centrifugal fan blades, the structure has been more perfect.