An induction heating device includes a case, a working coil, a base plate that is disposed vertically below the working coil, an indicator substrate support that is coupled to the case and that is disposed vertically below the base plate, an indicator substrate that is disposed on an upper surface of the indicator substrate support, that is disposed vertically below the base plate, and that is spaced apart from the base plate, an inverter substrate that is disposed at a lower surface of the indicator substrate support and that includes an inverter configured to apply a resonance current to the working coil through a switching operation, and a resonance substrate that is disposed at the lower surface of the indicator substrate support, that is connected to the working coil, and that includes a resonance capacitor configured to generate the resonance current based on the switching operation of the inverter.

An induction coil for an induction heating appliance is disclosed. The induction coil includes at least one base plate and at least one winding arrangement. The winding arrangement includes at least one portion of high winding concentration and at least one portion of low winding concentration. The winding arrangement includes at least two coils. The base plate is arranged above one or more winding arrangements. The base plate includes at least one conductive portion and at least one non-conductive portion. At least one conductive portion of the base plate is arranged above at least one portion of high winding concentration of the winding arrangement. At least one non-conductive portion of the base plate is arranged above at least one portion of low winding concentration of the winding arrangement.

An induction heating apparatus including a plurality of inverters configured with a plurality of types of switching topologies on a printed board assembly (PBA). The induction heating apparatus includes a cooking plate; a plurality of induction heating coils installed below the cooking plate and configured to generate a magnetic field; a plurality of driving circuits respectively connected to the plurality of induction heating coils and configured to supply a driving current to the corresponding induction heating coils; and a rectifier circuit configured to rectify AC power to supply the rectified AC power to the plurality of driving circuits. Each of the plurality of driving circuits may be connected in parallel to an output terminal of the rectifier circuit. The plurality of driving circuits may include at least one first driving circuit comprising one switching element and at least one second driving circuit comprising a plurality of the switching elements.

An induction heater for a cook top comprising: a first electrically insulating sheet (1); a second electrically insulating sheet (2); one or more inductors (5) arranged on a same plane between the first sheet (1) and the second sheet (2), each inductor (5) comprising a single electrically conductive track defining a flat spiral coil; at least one magnetic flux concentrator (4) arranged on a plane under the second sheet (2); a metallic heat sink plate (3) arranged under the at least one magnetic flux concentrator (4), adapted to dissipate the heat produced by the one or more inductors (5).

A wireless induction heating cooker includes a main body configured to receive and heat food objects therein, a lid configured to couple to an upper surface of the main body, and an inner pot configured to be accommodated in the main body and to be heated based on a magnetic field being generated by a heating coil of an induction heating device. The inner pot defines a heat conduction space that is surrounded by a bottom surface, an outer surface, and an inner surface of the inner pot.

An electronic induction heat cooking apparatus includes a rectifier for rectifying an input voltage and outputting a direct current (DC) voltage; a plurality of switching elements for switching the DC voltage output through the rectifier; a plurality of heating coils for heating a cooking utensil by controlling the plurality of switching elements; a controller for controlling the plurality of switching elements according to a plurality of operation modes; and a supporting member in which at least one of the plurality of heating coils is mounted. The supporting member includes a coil insertion part, into which the heating coils are inserted, and the magnetic member is inserted into the supporting member to directly face the heating coils at the lower side of the heating coils.

An electronic induction heat cooking apparatus includes a rectifier for rectifying an input voltage and outputting a direct current (DC) voltage, a plurality of switching elements for switching the DC voltage output through the rectifier, a plurality of heating coils for heating a cooking utensil by controlling the plurality of switching elements, a controller for controlling the plurality of switching elements, and a support member including grooves, into which the heating coils are inserted. A width of a cross section of each of the grooves decreases toward an entrance of each of the grooves.

An induction heating device includes: a base plate; a working coil disposed vertically above the base plate, the working coil including a conducting wire that is annularly wound; a ferrite core that is disposed on an upper surface of the base plate, that is disposed vertically below the working coil, and that is configured to direct upward an alternating magnetic field generated by the working coil; and an insulating member attached to an outer portion of the ferrite core and configured to electrically insulate the working coil from the base plate.

An induction heating device includes: a working coil including a conducting wire that is wound in an annular shape and that is connected to a plurality of electric terminals; a ferrite core disposed vertically below the working coil and configured to direct upward an alternating magnetic field generated by the working coil, the ferrite core defining a stepped portion at each corner of the ferrite core; a base plate that supports the ferrite core on an upper surface of the base plate and that defines a connection hole having a shape corresponding to the corner of the ferrite core; and an indicator substrate disposed vertically below the base plate. The indicator substrate includes a connector that is disposed on an upper surface of the indicator substrate, that is coupled to one or more of the plurality of electric terminals, and that protrudes upward through the connection hole.

A method for assembling an induction heating device includes the steps of interposing at least one ferrite bar between a coil assembly and a support plate, and snap engaging a central polymeric fastening element on the support plate. At least one end of the ferrite bar is inserted in a radial seat of the central polymeric fastening element. The coil assembly is snap engaged with the central polymeric fastening element in order to sandwich the ferrite bars between the support plate and the coil assembly.