What is a High frequency induction heating device?

In high-frequency induction heating, when the outer circumference of a metal rod (object to be heated) is wound with a coil and a high-frequency current is passed through the coil, a high-frequency magnetic flux is generated in the metal rod to heat the metal rod. At this time, the high-frequency magnetic flux transmitted through the metal generates a particularly strong eddy current on the metal surface (skin effect), so it is heated by Joule heat due to the current and the resistance of the metal. The unheated material must be a conductor, such as metal, because eddy currents need to be generated. The energy supplied to the object to be heated per unit area and unit time is large, and it is characterized by high-speed heating.

Application of High frequency induction heating device

High-frequency induction heating is often used for melting, quenching, and brazing metals because it can heat conductors such as metals in a non-contact manner. This is the principle used for IH cooking heaters in familiar situations. In addition, it is also used in resins, wood, textiles, food, and medical care. For example, in the case of thermoplastic resin, the resin can be welded by performing induction heating while pressing the resin with a mold. Alternatively, in the case of food manufacturing, when processing a large amount of food, a high frequency induction heating device can be installed in the factory line to rapidly thaw the food.

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