Induction heating device having improved indicator structure

An induction heating device comprising:

• a casing;
• a cover plate coupled to a top of the casing, the cover plate having a surface configured to seat an object;
• and
• a plurality of induction heaters located within the casing;
• wherein each induction heater comprises:
• a working coil configured to heat the object on the cover plate,
• an inverter configured to apply a resonant current to the working coil,
• a light guide located outside of the working coil, the light guide comprising a light-emission surface that is located at a top of the light guide, that is configured to indicate whether the working coil is driven, and that is configured to indicate an output intensity of the working coil,
• a light emitter located vertically below the light guide and configured to emit light to the light guide, and
• a controller comprising a printed circuit board (PCB) that is configured to mount the light emitter and the inverter, the controller being configured to control the inverter and the light emitter.

An induction heating device comprising:

• a casing;
• a cover plate coupled to a top of the casing, the cover plate having a surface configured to seat an object;
• and
• a first induction heater located within the casing,
• wherein the first induction heater comprises:
• a working coil configured to heat the object on the cover plate,
• an inverter configured to apply a resonant current to the working coil,
• a light guide located outside of the working coil, the light guide comprising a light-emission surface that is located at a top of the light guide, that is configured to indicate whether the working coil is driven, and that is configured to indicate an intensity of the working coil,
• a light emitter located vertically below the light guide and configured to emit light to the light guide,
• a controller comprising a printed circuit board (PCB), the controller being configured to control the inverter and the light emitter,
• a ferrite core located vertically below the working coil and configured to diffuse magnetic field generated from the working coil, and
• an insulation member that is located between the ferrite core and the controller and that is configured to reduce heat transfer to the controller.