Analysis of the working principle and application of electric heater

The principle of an electric heater is to install a primary coil with more turns and a secondary coil with fewer turns on the same iron core. The voltage ratio of the input and output is equal to the ratio of the coil number, while the energy is kept constant. Therefore, the secondary coil produces large current under low voltage conditions. For induction heater, the bearing is a secondary coil with short circuit and single turn. Under the condition of low alternating voltage, large heat is generated, resulting in great heat. When the thick metal is in the alternating magnetic field, the current is generated by the electromagnetic induction. When thicker metal generates current, the current will form a spiral flow path inside the metal, so that the heat generated by the current flow will be absorbed by the metal itself, which will cause the metal to rise rapidly. The electric heater itself and the yoke remain at normal temperature. Because the heating method can induce the current, the bearing will be magnetized. It is important to ensure that after bearing degaussing, make in the course of the operation will not stick to metal chip.

Application environment of electric heater:

The environmental conditions of the electric heater are: the air relative humidity is not more than 95%, and there is no explosive or corrosive substance or gas in the environment. The operating voltage can not be greater than 1.1 times the rated voltage, and the insulation resistance should not be less than 1M Omega.

The electric heating tube in the electric heater should be positioned and fixed. The effective heating area should be immersed in liquid or metal solid. The phenomenon of empty burning is forbidden. This will damage the electric heater.

If there is scale or carbon deposition on the surface of the pipe, it should be cleaned up immediately, so as not to affect the heat dissipation of the electric heating tube, thereby affecting the service life of the electric heater.

The fusible metal, or solid salt, alkali, asphalt, paraffin and other heating, should use low voltage. When the medium is melted, the voltage is then raised to the rated voltage.

When heating the air, the elements should be arranged uniformly, so that the components can have good heat dissipation conditions and make the air fully heated.

The wiring part should be outside the insulation layer, and to avoid the damp. When the wiring screw is fastened, it should be avoided too hard.

In contrast to the civilian industrial electric heater electric heater, on the whole have higher skill requirements. On the one hand, some industrial electric heater is necessary in high temperature, high pressure, strong corrosion working environments, and stable operation in the harsh environment, the usefulness is difficulty place of high-end electric industry the heater high skill request; on the other hand, often industrial electric heater production company to supply customers the industrial electric heater and its control system is a concept of the treatment plan, about the company's plan to control system, the usefulness of the system, fast operation has set a higher request. Today, industrial the electric heater aspects of the company and other small domestic companies working in the production of bad working environment, in the key of electric heating element production center skills has now reached the world leading level, also have The system must be developed to plan, but in the inductive strength and the British and world major manufacturers are still certain distance. Compared the civil electric heater working environment without industrial electric heater is so high, but compared to the industrial electric heater mainly for small batch, custom, civil electric heater because of its production of large volume, stable of the economy, has a very high request.