An induction cooker according to the present invention includes: a plurality of heating coils aligned in one row on a same plane; and a controller. The controller is configured to, when a heating target is placed over adjacent two or more of the plurality of heating coils, supply electric power to at least one, but not all, of the two or more adjacent ones of the plurality of heating coils and change, over time, the heating coils to which the power is supplied.

An induction heating cooking apparatus includes a plurality of heating coils aligned in at least one row on a flat surface, a plurality of inverter circuits each configured to supply a high-frequency current to the corresponding one of the plurality of heating coils, and a controller configured to control driving of the plurality of inverter circuits. The plurality of heating coils include a first heating coil and a second heating coil that are adjacent to each other. The controller is configured to, when a material forming a heating target loaded on an upper part of the first heating coil is a magnetic material, and a material forming the heating target loaded on an upper part of the second heating coil at least includes a nonmagnetic material, set a frequency of the high-frequency current supplied to the second heating coil higher than a frequency of the high-frequency current supplied to the first heating coil.

A cooking appliance includes a magnetic field control module that selectively cancels a portion of a magnetic field reaching an intermediate heating element generated from a working coil. The magnetic field control module may include a canceling coil and a switch capable of closing or opening the canceling coil.

A cooking appliance includes an upper plate configured to support an object to be heated, a first intermediate heating body located at the upper plate, a plurality of working coils configured to generate magnetic fields coupled to at least one of the object to be heated and the first intermediate heating body, an inverter configured to apply current to the plurality of working coils, and a controller configured to control the inverter so that at least one of the plurality of working coils does not operate in a portion of a cycle in a first heating mode.

An induction cooker includes a first coil, a second coil, a third coil, and a controller. Responsive to determining that a heating target placed above a first coil is formed of a magnetic material, a heating target placed above a second coil is formed of a magnetic material or a composite containing a magnetic material and a non-magnetic material, and a heating target placed above a third coil is formed of a non-magnetic material, the controller stops an operation of a first inverter circuit, causes a second inverter circuit and a third inverter circuit to operate, and sets a frequency of a third high-frequency current to be higher than a frequency of a second high-frequency current.

A household appliance device includes an integer number N of row switching elements at a row position i, wherein i is an integer number 1≤i≤N, an integer number M of column switching elements at a column position j, wherein j is an integer number 1≤j≤M, and a heating matrix including at least N×M heating matrix elements having positions (i, j), with N+M>2, wherein a heating matrix element at the position (i,j) includes at least one inductor at the position (i,j) and is connected to both the i-th row switching element and the j-th column switching element.

Systems, methods, and media for induction heating a first food vessel of a first size and a second food vessel of a second size include a base defining a well to separately receive the first food vessel and the second food vessel. A plurality of coil assemblies are mounted to a bottom side of a tray. The plurality of induction coils are electrically coupled with an inverter of the induction heating system. A sensing system is configured to indirectly measure a temperature of the first food vessel when the first food vessel is resting in the well and the second food vessel when the second food vessel is resting in the well. A controller is communicatively coupled with the sensing system and the inverter and is configured receive the temperature measurement from the sensing system, and control the inverter according to the measurement.

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.

The invention relates to an oscillation unit, in particular oscillation circuit (2), more in particular quasi-resonant oscillation circuit, for generating heating power for an induction cooking appliance (1), in particular for a domestic induction cooking appliance and/or an induction hob, the oscillation unit comprising a resonant tank (30), in particular a resonant circuit, for generating an electrical and/or magnetic field and/or heating power, the resonant tank (30) in particular connected to a first node (21), an, in particular single, switching element (35) connected to the resonant tank (30), in particular by the first node (21), and driven with switching signals for oscillating the resonant tank (30), a measuring unit (40) for measuring a first electrical parameter of the resonant tank (30), in particular for measuring a voltage (V.sub.CE)t more in particular for measuring a node voltage (V.sub.CE) of the first node (21), and an estimating unit (45) for estimating a second electrical parameter, in particular an electrical power, of the resonant tank (30) based on the first electrical parameter, an induction cooking appliance and a method for operating an oscillation unit.

A table type cooking apparatus includes: a heating coil that inductively heats an object; a power transmission coil that transmits power to a power receiving device; a housing that houses the heating coil and the power transmission coil; a top plate provided on an upper surface of the housing; and a leg portion provided on a floor surface to support the housing on a floor surface. The top plate includes: a heating area provided as an area in which the object is inductively heated by the heating coil, a power transmission area provided as an area in which power is transmitted from the power transmission coil to the power receiving device, and a work area including at least an area in which when at least one of the heating coil and the power transmission coil is in a conductive state, a surface potential of a metal object is constant.