The new fan is an effective air purification equipment, which can circulate indoor air. On the one hand, the dirty indoor air is discharged outside, on the other hand, the fresh outdoor air is input indoors through sterilization, disinfection, filtration and other measures, so as to keep the room fresh and clean at all times. The new fan adopts the patented technology of fresh air convection, which makes indoor air convection and replaces indoor air to the maximum extent through independent air supply and air introduction. The new fan has built-in multifunctional purification device. The new fan is mainly divided into two types: exhaust fan and blower fan, which can be installed in most indoor environments with convenient installation and comfortable use. The new fan is a healthy companion of home life.