Currently, in many new products, ultraviolet disinfection "220V Cooling Fan" most representative. According to reports, the fan has a powerful UV germicidal effect, the principle is all blown out of the air through the fan to go through direct exposure to ultraviolet light, so as to air disinfection. After testing authorities, ultraviolet disinfection "220V Cooling Fan" to run for half an hour in the room, which can effectively sterilize 98.36%. In other countries, the bactericidal effect of ultraviolet radiation on the air to be confirmed. Results of a study on international medical authority of the media pointed out, "220V Cooling Fan" installation of ultraviolet light to kill bacteria in the ventilation system, can significantly reduce the prevalence of staff's office.