An induction heating apparatus includes a plate on which a cookware is placed, a plurality of working coils disposed below the plate, a plurality of coil bases on which the plurality of working coils is disposed, and a cookware sensor. The plurality of coil bases are coupled to each other, and the cookware sensor is disposed between the plurality of working coils. A controller is configured to detect the presence or absence of the cookware on the plate based on a resonance signal generated by at least one of the plurality of working coils or the cookware sensor, and is configured to select a heating coil to be used for heating the cookware among the plurality of working coils.

A controller and cooktop appliance configured to execute steps of a method for operating the cooktop appliance are provided. The method includes detecting a temperature drop of a threshold magnitude during an observation period; allowing for temperature decrease during a waiting period; obtaining a rolling difference in temperature during a calculation period; and determining, from the rolling difference in temperature, whether cookware is removed based on a comparison of a quantity of differences above a temperature magnitude to a quantity of differences below the temperature magnitude.

An induction system includes a single power inverter, a plurality of power branches coupled to the single power inverter in parallel, and a controller. Each of the plurality of power branches includes an induction coil, a capacitor coupled to the induction coil to form a resonant circuit, and a power switch coupled in series with the resonant circuit. The controller is configured to regulate an output power of the resonant circuit of each of the plurality of power branches by varying a switching frequency of the single power inverter to adjust the output power of the resonant circuit of all of the plurality of power branches and/or selectively transmitting a signal to the power switch of a respective power branch of the plurality of power branches to turn-on and turn-off the power switch of the respective power branch to individually adjust the output power of each of the plurality of power branches.

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 heating cooker comprises a rectifying unit for rectifying an AC voltage from a power supply to a DC voltage and first and second switching units for switching to alternately apply the DC voltage from the rectifying unit to the working coil for driving the working coil. A device of sensing a cooking container in the induction heating cooker comprises a first current sensing unit configured to sense a first current flowing between the power supply and the rectifying unit, a second current sensing unit configured to sense a second current flowing to the working coil, and a controller configured to determine if the cooking container placed on the working coil is present based on the first and second currents.

An induction cooker includes a microcrystal panel and at least three temperature sensors scattered on a bottom surface of the microcrystal panel, and the induction cooker is configured to heat a container to be measured. The method includes: obtaining temperature data collected by the at least three temperature sensors and position data of each temperature sensor relative to the microcrystal panel; obtaining an actual position of the container on the microcrystal panel according to the temperature data and the position data; obtaining a preset temperature curve matching the induction cooker according to the temperature data, and extracting a peak value of the preset temperature curve; and calculating an actual temperature of the container to be measured according to the actual position and the peak value.

An induction heating device includes a case, a working coil, a cover plate, a luminous element, a light guide disposed around the working coil, an input interface that is flush with an upper surface of the cover plate, a first controller configured to control driving of the working coil and the luminous element and to detect a position of one or more objects disposed on the upper surface and an arrangement sequence of the one or more objects placed on the upper surface, and a second controller configured to receive, from the first controller, information on the position and the arrangement sequence of the one or more objects, and control the input interface to display an image corresponding to a heating zone for the one or more objects based on the information on the position and the arrangement sequence of the one or more objects.

A cooking appliance such as a range or stovetop incorporates cooking container sensing for controlling burner ignition and/or triggering events in programmed cooking sequences.

Provided is an induction cooking apparatus including a heating part including a working coil forming a heating region and configured to heat a container placed in the heating region, an inverter configured to supply a driving voltage to the working coil, a plurality of sensing coils arranged along a circumferential portion of the working coil and sensing the container placed in the heating region, and a controller configured to determine whether to drive the inverter on the basis of information acquired from the plurality of sensing coils.

An induction heating device capable of preventing a fuse breaking phenomenon that occurs when a user preheats an empty vessel by determining whether or not a load is present in the vessel, and a method for controlling an induction heating device. In order to prevent a rapid rise in temperature of a vessel occurring in process during which a user preheats an empty vessel using an induction heating device and a fuse breaking phenomenon resulting therefrom, a controller of the induction heating device may determine whether or not a vessel placed on a working coil is an empty vessel in a vessel heating process, that is, whether or not a load is present in the vessel.