Electromagnetic induction heater.

摘要

Disclosed is an electromagnetic induction heater in which magnetic flux diffusing members (4) are fixed to at least two ends of an iron core (1) wrapped with an electric wire to form a coil (3), and a metal plate (5) is connected to the magnetic flux diffusing members (4) to heat a wide area of the metal plate (5) uniformly. By supplying a commercial low frequency alternating power source of 50-60Hz to the coil (3), a magnetic flux is generated in the iron core (1). The magnetic flux, flowing in the magnetic flux diffusing members (4), is diffused in a longitudinal direction. Diffused magnetic flux flows through the metallic plate (5) to generate Joule heat over the plate. Therefore, the entire surface of the metal plate (5) is heated uniformly. Either a single-phase or three-phase alternating power source is used in this invention. <IMAGE>