A method for operating an induction cooking hob comprising a plurality of inductors in association with induction resonant inverters operating in load-dependent frequency ranges comprises a simultaneous activation of inductors, in at least one phase of the control period, independently from their association to one or more overlying cooking utensils but only according to at least partial overlapping of associated operating frequency ranges.

The present invention relates to a kitchen appliance (1) that is operated wirelessly on an induction heating cooker (K), comprising a programmable microcontroller (2), one or more than one electronic circuit (3) that provides the microcontroller (2) to control the communication means, user interface and sensors, providing communication with the induction heating cooker (K) whereon the kitchen appliance (1) is operated, a power control circuitry (4) that supplies the microcontroller (2) and the electronic circuits (3) with low level DC voltage, a receiver coil (5) that partially collects and provides transfer of the power generated by the induction coil (B) in the induction heating cooker (K) to the power control circuitry (4), a rectifier (6) that converts the AC voltage delivered from the receiver coil (5) to DC voltage and a buffer capacitor (7) which filters the DC voltage at the rectifier (6) outlet.

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.

The subject matter of the invention is a reinforced glass plate for an induction cooking device, the chemical composition of which comprises the following colorants, in a content which varies within the weight limits defined hereinafter: Fe.sub.2O.sub.3 (total iron): 0.8% to 1.8%, CoO: 0.02% to 0.06%, Se: 0 to 0.005%, Cr.sub.2O.sub.3: 0 to 0.1%. The invention is also directed towards an induction cooking device comprising at least one inductor placed under such a glass plate.

Disclosed are an electromagnetic heating device and a heating control circuit thereof, and a low power heating control method. The heating control circuit comprises: a voltage zero-crossing detection unit for detecting a voltage zero-crossing signal of an alternating current power source; a resonance heating unit; a rectification and filtering unit; a power switch tube; a drive unit, connected to a drive end of the power switch tube to drive the power switch tube to be turned on and off; a drive voltage transformation unit, connected to the drive end of the power switch tube to change a drive voltage of the power switch tube; and a main control unit for controlling the power switch tube to operate under the drive of a first drive voltage according to the voltage zero-crossing signal, thereby reducing the damage risk of the power switch tube and reducing turn-on noises.

An inductive heating device for heating an aerosol-forming substrate a susceptor includes a device housing, a DC power source for providing a DC supply voltage and a DC current, a power supply electronics, and a cavity in the device housing for accommodating a portion of the aerosol-forming substrate to inductively couple the inductor to the susceptor. The power supply electronics include a microcontroller programmed to determine an apparent ohmic resistance, and from the apparent ohmic resistance the temperature of the susceptor. It is further programmed to monitor changes in the apparent ohmic resistance and to detect a puff when a decrease of the apparent ohmic resistance is determined which is indicative of a temperature decrease of the susceptor during a user inhalation.

Disclosed are an electromagnetic heating device and a heating control circuit thereof, and a low power heating control method. The heating control circuit comprises: a voltage zero-crossing detection unit for detecting a voltage zero-crossing signal of an alternating current power source; a resonance heating unit; a rectification and filtering unit; a power switch tube; a drive unit, connected to a drive end of the power switch tube to drive the power switch tube to be turned on and off; a drive voltage transformation unit, connected to the drive end of the power switch tube to change a drive voltage of the power switch tube; and a main control unit for controlling the power switch tube to operate under the drive of a first drive voltage according to the voltage zero-crossing signal, thereby reducing the damage risk of the power switch tube and reducing turn-on noises.

Disclosed herein is a cooking apparatus including a cooking plate, induction heating coils installed under the cooking plate, a vessel sensor configured to detect a cooking vessel while the cooking vessel is placed on the cooking plate, a driving assembly including a driving circuit configured to generate a driving current and distribute the driving current to each of the induction heating coils, and a sub assembly including a vessel sensing circuit configured to determine one or more of the induction heating coils overlapping the cooking vessel based on an output of the vessel sensor. The sub assembly may be separated from the driving assembly.

A wok apparatus applicable to fully automated cooking machine includes a wok, electromagnetic heating coils, an electromagnetic heating device, a wok rotating device and a wok working position controlling device, wherein the electromagnetic heating coils wind around an external wall of the wok and heat the wok under the control of the electromagnetic heating device, the wok rotating device is connected with the wok so as to control the wok to rotate 360 degrees; the wok working position controlling device is used for securing the wok to a frame of the cooking machine and rotating the wok to respective working positions to perform respective operations, the electromagnetic heating device, the wok rotating device and the wok working position controlling device are all connected with a main control device of the cooking machine, so as to receive control commands and perform corresponding operations according to the control commands.

A cooking apparatus includes: a cooking plate; at least one induction heater below the cooking plate and configured to generate a magnetic field; and a light source configured to emit light, wherein the cooking plate may include: a glass body; a printing layer on a lower surface of the glass body, the printing layer including a hole configured to allow the light emitted from the light source to be transmitted through the hole, and a color filter layer on a lower surface of the printing layer and corresponding to the hole in a vertical direction, wherein the cooking plate is divided into a first region that corresponds to the at least one induction heater and a second region that does not correspond to the at least one induction heater, and wherein the color filter layer is located in the first region.