The working principle of electric heater is the thermal effect of current. When current passes through various conductors, it increases the temperature of conductors. The device that tenants want to use the thermal effect of current to work is called electric heater.
The main heating component of traditional electric heater is resistance element, but with the innovation of technology, electric heating film is used more and more widely as a new heating element of electric heater.
Electric heating is a basic property of conductor, which is related to the size, material and thickness of electrified conductor. At present, most electric heaters use heating resistance elements. Because the electric energy consumed is calculated according to the average electric power and service time, at the same time, for the convenience of measurement and calculation, the thermal calculation of electric heaters is still based on the average electric power.
In fact, sinusoidal alternating current is used in production and daily life. Therefore, the instantaneous heating rate of heating resistance element, that is, the heat flow generated by instantaneous electric power, will also change with time, which is not a constant.
