In everyday life often see DC / AC "220V Cooling Fan", mainly applied to the field of network communications industry, industrial equipment, medical equipment, computer and information industry, household appliances and equipment. Therefore, the cooling fan manufacturing industry still has considerable market potential. On the export side, the next period, "220V Cooling Fan" exports should primarily focus on the medium and small, miniature fan. But with the rapid development of China's electronic information industry, making the heat flux density electronic devices continue to increase, this will inevitably electronic devices have a higher cooling requirements, and therefore "220V Cooling Fan" effectively solve the heat problem has become the electronic equipment that must be addressed key technologies.