"220V AC Cooling Fan" is widely used in computers, communications products, optical products, consumer electronics, automotive electronics, switches, medical equipment, heaters, air conditioners, invert, ATM, car refrigerator, welding machines, induction cooker, audio equipment, environmental equipment, refrigeration equipment and other equipment on a traditional or modern. Same specifications fan products produced by each manufacturer and its quality has a different life, mainly from differences in each one of the structural design, electrical performance design, material selection and process control, etc. are different; second is "220V AC Cooling fan" user installation bit Ge selection and use of environmental conditions, such as integrated to decide, in order to achieve the desired quality and service life requirements, users in the selection of the fan sometimes not by the manufacturer to provide a set of data it can to ensure its quality and longevity so simple, user requirements and to their fans for the installation, use, environment, etc. to inform manufacturers, producers of "220V AC Cooling fan" for a comprehensive assessment before the specifications of the fan structure selection, design and material selection, electrical properties, such as the requirements to achieve this condition, otherwise everything will be impossible to achieve.