Fan

The utility model relates to a fan, including airframe component, the aircraft nose, the control panel who links to each other with airframe component, monitoring loop according to human distance control aircraft nose start -stop or speed reduction, the airframe component upper end is connected with the aircraft nose, the aircraft nose is equipped with the motor, the monitoring loop is provided with control fan and opens the switch that stops, the monitoring loop is surveyed human distance and is installed the induction system on fan including being used for, monitor the human body, the monitoring loop is according to human distance control aircraft nose start -stop or speed reduction, when the human body gets into the scope of monitoring loop settlement, fan is automatic to be opened, human cross when near apart from fan, fan self -closing, prevent that the flabellum rotation from injuring the staff, when fan is kept away from to the human body, fan carries out the automation through the monitoring loop and