INDUCTION HEATING COIL AND INDUCTION HEATING DEVICE USING THE INDUCTION HEATING COIL

摘要

An induction heating coil surrounding a hot rolled steel that is being conveyed on a plurality of conveyer rollers so as to heat the hot rolled steel by high-frequency induction heating (movement heating), and an induction heating device using the induction heating coil. The induction heating coil (2) surrounding an object to be heated (such as a thin slab (8)) to heat it by induction, has a first coil portion (13) formed by winding a wire spirally while moving in one direction (indicated by arrow ( alpha )) along the coil axis (S) and a second coil portion (14) coupled to an end (turn back point (18)) of the first coil portion (13) and formed by winding a wire backward while moving in the other direction (indicated by arrow ( beta )) along the coil axis (S), both being overlapped in a contactless manner.