Electric heater and control method and device of electric heater

The invention discloses an electric heater and an electric heater control method and device.According to the electric heater control method, after a heating load of the electric heater is started, whether potential safety hazards exist in the use process of the electric heater can be obtained by obtaining the current distance between the electric heater and a target; when the current distance is smaller than the preset distance threshold value, it is considered that potential safety hazards exist when the electric heater is used, at the moment, a heating load of the electric heater needs to be controlled to stop heating, a heat dissipation load of the electric heater needs to be controlled to dissipate heat, and therefore heat generated by the heating load of the electric heater can be dissipated as soon as possible; in the heat dissipation process of the heat dissipation load, the actual temperature of the air outlet is obtained, and when the actual temperature is smaller than the preset temperature threshol