Principle of Operation

Electric heaters, a category of equipment that converts electrical energy into heat energy by consuming electricity, have achieved the purpose of heating materials that require heating. During operation, low-temperature fluid medium, when subjected to certain pressure through pipes, enters the inlet and flows around the heat exchange channels set within the electric heating vessel. These channels are designed using principles of fluid thermodynamics to extract high-temperature heat energy from the electric heating elements, thereby increasing the temperature of the heated medium. The outlet of the electric heater reaches the required high temperature of the medium. The control device inside the electric heater automatically adjusts the power of the heating equipment based on the temperature sensor's signal at the outlet to ensure that the temperature difference of the medium at the outlet is not significant, maintaining a relatively even temperature. If the heating elements exceed the temperature limit, the individual overheating protection device for the heating elements will immediately shut off the power supply. Attention should be given to situations such as coking, degradation, and carbonization caused by overheating of the heating material.

Heating Method

One, Resistance Heating: Utilizes the Joule effect within the electric current to convert electrical energy into heat. There are generally two types: direct resistance heating and indirect resistance heating. In direct resistance heating, the power supply voltage is applied directly to the object to be heated. Indirect resistance heating requires heating elements made from specialized alloys or non-metallic materials.

Two, Inductive Heating: The heat effect produced by the induced current formed in the alternating electromagnetic process of the conductor allows the conductor itself to heat up. Depending on different process requirements, the frequency of the AC power used in inductive heating includes industrial frequency, medium frequency, and high frequency, etc.

Arc Heating: Utilizes high-temperature heating of objects through arc formation. An arc is a gas discharge occurring between the electrodes. The voltage of the arc is not particularly high, but its current is quite large. Its powerful current is maintained by the large ions produced by the evaporation of the electrodes, making it susceptible to nearby magnetic fields.

Four: Electron Beam Heating: By using the effect of an electric field, electrons in high-speed rotation strike the surface of an object to achieve heating. The main component of the electron beam heating system is the electron beam generator, which is also sometimes referred to as the "electron." Its advantage lies in the ability to quickly and easily adjust the heating power.