An induction heater for a cooking surface,

the induction heater comprising

an electrically insulating layer;

at least one inductor defining a winding, adapted, at least, to heat at least one cooking utensil;

at least one sensor adapted, at least, to detect whether said at least one cooking utensil is placed above the cooking surface;

at least one magnetic flux concentrator;

wherein said at least one inductor and said at least one sensor are arranged on said electrically insulating layer;

wherein said layer is interposed between said at least one inductor and said at least one magnetic flux concentrator.

An induction cooking apparatus includes a plurality of induction coils arranged in at least one array. At least one beam structure is configured to support the at least one array of induction coils. At least one electrical circuit is in connection with the at least one beam structure and in communication with each of the plurality of induction coils forming the at least one array. At least one inverter assembly is configured to drive the induction coils. The electrical circuit and the inverter assembly form a connection interface including a plurality of mating connectors. The mating connectors of the connection interface electrically connect the array with the inverter assembly.

The present disclosure comprises: a case; a cover plate coupled to the upper end of the case and provided with an upper plate on which an object to be heated is disposed; a working coil provided inside the case; a thermal insulation material provided between the upper plate and the working coil; a first thin film provided on the lower surface of the upper plate and the inductively heated by the working coil; and a second thin film provided on the upper surface of the upper plate and contacting the object to be heated.

A method for heating a cooking vessel on a hob with a plurality of heating devices is described. Each heating device has a heating region in which a cooking vessel can be arranged in order to be heated by the heating device under the control of a power supply. The cooking vessel has a temperature sensor together with an evaluation apparatus and a transmitting apparatus for transmitting an identification and temperature data. A controller controls the heating device in a specific manner and evaluates the received temperature data using a plurality of plausibility checks in order to determine whether said data match the operation of the heating device. If these plausibility checks are passed, the cooking vessel is assigned to the heating device.

A cooking apparatus includes: a receiving coil configured to receive power wirelessly, a first rectifier configured to rectify power transmitted from the receiving coil, a first DC capacitor connected to an output terminal of the first rectifier, a working coil, an inverter, a second DC capacitor connected to an input terminal of the inverter, and a filter circuit connected between the first DC capacitor and the second DC capacitor and configured to block a noise current that flows between the first DC capacitor and the second DC capacitor and that is associated with a predetermined frequency or a frequency higher than the predetermined frequency. The inverter is configured to convert power from the second DC capacitor into an alternating current and transmit the converted alternating current to the working coil.

A cooking apparatus includes: a working coil, an inverter configured to output a resonant current to the working coil, a current detector configured to detect the resonant current and output a detection value corresponding to the resonant current, and a controller. The controller is configured to control the inverter to flow a first resonant current through the working coil, control the inverter to flow, through the working coil, a second resonant current having a frequency different from the first resonant current, and determine, based on a difference between a first detection value for the first resonant current and a second detection value for the second resonant current, whether a target object that is located adjacent to the working coil is a predetermined object.

The present invention relates to an induction heating cooker and, more specifically, to an induction heating cooker comprising triple heating coils which have the same center and operate by different power sources. The induction heating cooker of the present invention comprises a control unit for controlling first to third coil driving circuits so as to operate the first to third heating coils at the same frequency.

A cooking assembly comprising a countertop (6) and an induction cooking device (1) attached to the bottom (8) of the countertop (6). The induction cooking device comprises: an induction coil formed from a wire having a substantially uniform non-circular cross-section which is higher than it is wide and which is at a distance (d.sub.6) from a top surface (7) of the countertop between 10 and 50 mm, said induction coil having an outer diameter and an inner diameter which is at least equal to 40% of said outer diameter; a generator (15, 16) configured to supply an AC current to the induction coil with a frequency between 30 and 80 kHz; and a magnetic flux concentrator disposed underneath the induction coil and covering at least 50% of the bottom of the induction coil and having a relative magnetic permeability of at least 1000.

A coil assembly and an induction heating device including a coil assembly are provided. The coil assembly may include a coil frame having a shape corresponding to a shape of a heating region defined in a plate. A working coil may extend alternately in between opposite first and second directions, rather than being circularly arranged as in related art coil assemblies.

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 provided with a plurality of turns (15); wherein the thickness (t) of each inductor (5) is comprised between 100 and 500 m; and wherein the ratio between the distance (g) between the consecutive turns (15) of each inductor (5) and the thickness (t) of each inductor (5) is lower than or equal to 1.5.