Pengenalan dan prinsip air elektrik pemanas

Elektrik pemanas are widely used in industry, usually including explosion-proof electric heaters, induction electric heaters, and air electric heaters. It is not difficult to describe them with thousands of types. Today, we will introduce several characteristics and principles among them.

The working principle is to install a primary coil with more turns and a secondary coil with fewer turns on the same iron core. The voltage ratio between input and output is equal to the ratio of coil turns, while the energy remains constant. Therefore, the secondary coil generates a large current under low voltage conditions. For induction heaters, the bearing is a short circuited single turn secondary coil that generates a large amount of heat under low AC voltage conditions through a large current. The heater itself and magnetic yoke are kept at room temperature. Due to the induction of current by this heating method, the bearing will be magnetized.

It is important to ensure that the bearings are demagnetized in the future so that they do not absorb metal magnetic debris during operation. Electric air heaters all have an automatic demagnetization function, which uses metal to generate eddy currents in an alternating magnetic field to generate heat, usually used in metal heat treatment and other aspects. The principle is that when thicker metals are in an alternating magnetic field, they will generate current due to electromagnetic induction. After the thicker metal generates current, the current will form a spiral flow path inside the metal. This way, the heat generated by the current flow is absorbed by the metal itself, causing the metal to quickly heat up. The high-temperature resistance wires are evenly distributed in the high-temperature resistant stainless steel seamless pipe, and the gaps are densely filled with crystalline magnesium oxide powder with good thermal conductivity and insulation properties. This structure is not only advanced, but also has high thermal efficiency, And the heating is uniform. When there is current passing through the high-temperature resistance wire, the generated heat diffuses to the surface of the metal tube through crystalline magnesium oxide powder, and then transfers to the heated part or air to achieve the purpose of heating.

The air electric heater is mainly used to heat the required air flow from the initial temperature to the desired air temperature, with a maximum of 850 degree . It has been widely used in many research and production laboratories such as aerospace, weapons industry, chemical industry, and higher education institutions. Especially suitable for automatic temperature control and high flow high temperature combined systems and accessory testing. The range of use of air electric heaters is wide: they can heat any gas, and the generated hot air is dry, non conductive, non combustible, non explosive, non chemically corrosive, pollution-free, safe and reliable, and the heated space heats up quickly (controllable).

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