Defrosting Freezer Heating Cable

Cold storage door frame heating wire is not long-term energized. The working principle of the defrost wire heater is based on Joule's law, which is that the current converts electrical energy into heat energy. Electric heating means that after the current passes through the conductor, the current will generate a certain amount of heat and be transferred by the conductor. The defrost door heater wire itself is a metal conductor, and it will emit heat after being energized, thereby providing heat to melt the frozen door crack and prevent the door crack from freezing to death. After the electric heating wire is energized for a period of time, it will automatically cut off the power supply. The heating line will hold heat for a period of time, and after the temperature drops, it needs to be re-energized for heating.