An induction cooking hob (1) with illumination equipment includes a cover element (2) arranged at the top side of the induction cooking hob and including at least one heating zone, a chassis (5) arranged below the cover element (2) and at least one induction coil unit (3) having an induction coil (10). The induction coil unit (3) is arranged below the at least one heating zone. According to the invention, a light emitting diode (4) is mounted to the center of the at least one induction coil unit (3). Thermal conductive contact between the light emitting diode (4) and the chassis (5) is provided by a spring element (12) pressing at least a surface of the light emitting diode (4) onto the chassis (5).

Cookware, and an induction cooking system including the cookware, include a container, a base layer, and a susceptor layer. The container and the base layer are non-magnetic at room temperature, while the susceptor layer is magnetic at room temperature and has a Curie temperature at which the susceptor layer becomes non-magnetic. During heating of a material within the container, the base layer functions as a passive heat exchange to transfer heat across the susceptor layer. Further, during the heating, the base layer conducts an electric current when the susceptor layer approaches a leveling temperature and/or the Curie temperature of the susceptor layer, thereby decreasing an amount of heat produced and resulting in a more even heating of the material.

An induction heating system includes a housing, a heating surface, a first power inverter disposed within the housing, a second power inverter disposed within the housing, a first plurality of working coils, and a second plurality of working coils. The first plurality of working coils is connected in series. The first plurality of working coils is disposed within the housing and electrically coupled to the first power inverter. The second plurality of working coils is connected in series. The second plurality of working coils is disposed within the housing and electrically coupled to the first power inverter. The first plurality of working coils and the second plurality of working coils are configured to receive power from the first power inverter and the second power inverter, respectively, to produce magnetic fields that interact with a ferrous material of cooking vessels or of the heating surface to generate heat in the ferrous material.

A system and method for defrosting a load are presented. Radio frequency (RF) signals are supplied to a transmission path that is electrically coupled to one or more electrodes that are positioned proximate to a cavity to cause the one or more electrodes to radiate RF electromagnetic energy. An RF power value of the RF signal along the transmission path is periodically measured resulting in RF power values and a rate of change of the RF power values is determined. A low-loss indicator value is determined using the RF power values, wherein the low-loss indicator value is at least partially determined by a dielectric loss of a load in the cavity. A controller determines, using the rate of change of the RF power values and the low-loss indicator value, that the load is in a defrosted state and stops supplying the RF signals.

An induction heating system includes a power inverter, an induction circuit, and a control circuit. The power inverter includes one or more transistors configured to receive a direct current (DC) input and produce an alternating current (AC) output. The induction circuit includes at least one working coil configured to receive the AC output and produce a first magnetic field, wherein the first magnetic field interacts with a ferrous material to generate heat in the ferrous material. The control circuit includes a processor and memory. The memory having instructions stored thereon that, when executed by the processor, cause the control circuit to receive an input, from a user, indicating a temperature set point, measure an inductance of the induction circuit, determine a resonant frequency of the induction circuit based on the inductance, and control the one or more transistors of the power inverter based on the resonant frequency and the temperature set point.

The present invention relates to a connecting element (10) for connecting an induction coil (24) to a coil carrier (26) of an induction cooking hob. The connecting element (10) is made of an elastic material and formed as a single-piece part. The connecting element (10) includes a first snap-fit portion (12) connectable to a cut-out of the induction coil (24), so that the snap-fit portion (12) and the cut-out form a snap-in mechanism. The connecting element (10) includes a spring portion (14) arrangeable between the induction coil (24) and the coil carrier (26), so that the spring portion (14) provides a distance between the induction coil (24) and the coil carrier (26). The connecting element (10) includes at least one groove (16) enclosing at least partially the connecting element (10). The groove (16) is engageable with the cut-out of the induction coil (24). The connecting element (10) includes a second snap-fit portion (18) extending opposite to the first snap-fit portion (12). The second snap-fit portion (18) is connectable to a cut-out (32) of the coil carrier (26), so that the second snap-fit portion (18) and the cut-out (32) form a snap-in mechanism.

An induction cooking system in accordance with the principals of the present invention includes an induction cooking appliance and custom cookware. The induction cooking appliance includes a cooktop surface, an induction heating system contained below the cooktop surface, and a temperature sensor. The temperature sensor sensing temperature above the cooktop surface. The induction heating system includes a coil positioned immediately below the cooktop surface. The coil is configured to produce an electromagnetic field when the coil is energized. The custom cookware is configured to be placed on the cooktop surface above the coil. The custom cookware includes an inner shell and an outer shell. The inner shell is comprised of a metallic material to heat a food material. The outer shell is comprised of a thermally insulative material that is substantially transparent to magnetic flux. The outer shell includes an underside configured to rest on the cooktop surface above the coil during cooking. The underside defines a thermal-insulation aperture through which the temperature sensor extends temperature sensing above the cooktop surface to the inner shell.

A cooking device that includes a controller configured to, after being activated, control an operation of the cooking device; a communication unit configured to, after being activated, transmit data to a wireless power transmission device; a pickup coil configured to wirelessly receive power from a transmitting coil of the wireless power transmission device; a rectification unit configured to rectify the an alternating current (AC) of the pickup coil corresponding to the power received by the pickup coil, to produce a direct current (DC); a first capacitor configured to be charged in accordance with the DC current produced by the rectification unit to activate the communication unit; and a second capacitor, having a capacitance greater than a capacitance of the first capacitor, configured to be charged in accordance with the DC current produced by the rectification unit to activate the controller, so that the communication unit is activated before the controller.

Disclosed herein is a cooking appliance. A working coil is provided at a lower portion of the cooking appliance. The working coil heats a tray disposed in a cooking compartment in an IH mode. A receiver coil wirelessly receiving external power is stacked below the working coil. An electromagnetic shielding plate is installed between the working coil and the receiver coil to partition a space in which the two coils are installed. The electromagnetic shielding plate shields an electromagnetic field or electromagnetic waves such that the electromagnetic field or electromagnetic waves in one of the two partitioned spaces does not leak to the other space located across the electromagnetic shielding plate.

An inductive cooking combined shield configured to be arranged below a cooking coil winding may include a plurality of ferrite bars and a plurality of elements made of a second material alternatively arranged in a plane so that to create a complementary electromagnetic shielding that extends from the center of the coil to the perimeter and has a modular structure that allows to block and/or to mitigate undesired macro eddy currents generated by the electromagnetic flux produced by the current flowing inside the winding.