Abstract: An electric fan with a sensor includes a sensor, a control chip, a light control unit, a light sensor and a power control unit. The sensor is connected with the control chip. The control chip is connected with the light control unit. The light control unit includes illuminating devices corresponding to the light sensor. The light sensor is connected with the power control unit. The power control unit includes a power supply. When the sensor is activated and outputs a signal to the control chip which then controls the light control unit to activate the illuminate devices to illuminate. The light sensor sends a signal to the power control unit to change the output of a power supply, so as to vary the speed of the fan.

Abstract: A fan blade is perforated with a plurality of through holes with the surface of each hole and the blade provided with and made integrated with an active carbon filtration filter, or the perforated fan blade is made in the form of a hard net and the active carbon filtration layer is provided in each mesh of the net.

Abstract: A fan blade cut off system includes a mesh seat and a mesh cover. The mesh seat has a conductor. The mesh cover comprises a conductive plate corresponding to the conductor of the mesh seat. When the mesh cover is buckled to the mesh seat, the conductive plate engages with the conductor to form a closed circuit, and when the mesh cover is disengaged from the mesh seat, the circuit is in open status.

Abstract: A fan blade provided with an active carbon filter bed, wherein, an opening is provided in the center of the fan blade, and said opening is covered with an active carbon filter bed. And said active carbon filter bed can be in the form of powder, grain or fiber attached by any means to non-woven fabric, fiber layer, staple on the base filter element of porous PE or PU foam. Furthermore, both of the active carbon filter bed and the fan blade can be adhered to each other by glue, adhesive band, equi-directional magnet or other adhesion or structure.

Abstract: A fan blade provided with an active carbon filter bed, wherein, an opening is provided in the center of the fan blade, and said opening is covered with an active carbon filter bed. And said active carbon filter bed can be in the form of powder, grain or fiber attached by any means to non-woven fabric, fiber layer, staple on the base filter element of porous PE or PU foam. Furthermore, both of the active carbon filter bed and the fan blade can be adhered to each other by glue, adhesive band, equi-directional magnet or other adhesion or structure.