An induction heating device includes: a casing; a cover plate coupled to a top of the casing and configured to seat an object on a top surface of the cover plate; a working coil located within the casing and configured to heat the object on the top surface of the cover plate; a base plate configured to support the working coil; an indicator board that is located vertically below the base plate and that is spaced apart from the base plate to define an air-flow path between the base plate and the indicator board, where the indicator board includes a plurality of light emitting elements; and a blowing fan located at a first side of a bottom surface of the casing and configured to suction air into the casing from an outside of the casing and to discharge air into the air-flow path.

An induction heating device includes a casing; a first induction heating module in the casing; a first heat sink located below the first induction heating module; a first heat pipe that passes through the first heat sink, that extends outward from the first induction heating module, and that is configured to discharge heat from the first heat sink out of the first induction heating module; an air-discharge fan located at an inner side of the casing and configured to discharge air from inside of the casing to outside of the casing; and a cooling fan located at the inner side of the casing and configured to blow air to the air-discharge fan. The first heat pipe has an end that protrudes from the first induction heating module and that is located at an air-flow path defined between the cooling fan and the air-discharge fan.

An induction heating device includes a casing, a cover plate coupled to a top of the casing, and a first induction heating module located within the casing and configured to heat an object on the cover plate. The first induction heating module includes: a working coil; an inverter configured to apply a resonant current to the working coil; a light guide located outside of the working coil, where the light guide includes a light-emission surface that is located at a top of the light guide, that is configured to indicate whether the working coil is driven, and that is configured to indicate an intensity of the working coil; a light emitting element vertically located below the light guide and configured to emit light to the light guide; and a control module configured to control the inverter and the light emitting element.

A smart table is disclosed. The smart table includes a plate, an inverter configured to convert direct current (DC) power into alternative current (AC) power and to supply the AC power, a coil unit disposed below the plate and including a plurality of working coils heated by the AC power, a radio frequency identification (RFID) reader configured to recognize an RFID tag of a home appliance placed on the plate and to receive information on the home appliance from the RFID tag, and a processor configured to drive one or more of the plurality of working coils as wireless power transmission coils to perform control to transmit wireless power to the home appliance based on the received information.

An induction heating device includes a case, a cover plate, a working coil, a base plate, a light guide that is located around the working coil and includes a light-emitting surface that indicates an output intensity of the working coil or an operation state of the working coil, and a light-emitting element that emits light toward the light guide. The light guide includes a light-guiding portion that has a lower surface having a parabolic shape and an upper surface including the light-emitting surface in which the upper surface extends in a first direction farther than the lower surface, and a light-guiding support that couples to the base plate, that surrounds at least a portion of the light-guiding portion, and that reflects, toward the light-guiding portion, at least one of light that has been emitted from the light-emitting element or light that has been guided through the light-guiding portion.

A household appliance device includes an integer number N of row switching elements at a row position i, wherein i is an integer number 1iN, an integer number M of column switching elements at a column position j, wherein j is an integer number 1jM, a heating matrix including at least NM 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. At least one switching diode connects at least one of the row switching elements or at least one of the column switching elements to at least one reference potential.

A household appliance device includes an integer number N of row switching elements at a row position i, wherein i is an integer number 1iN, an integer number M of column switching elements at a column position j, wherein j is an integer number 1jM, and a heating matrix including at least NM 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.

A household appliance device includes an inductor, a switching unit, at which an operating voltage is applied in an operating state, and a control unit configured to supply a supply voltage for the inductor by switching the switching unit. The control unit is configured to vary a frequency of the supply voltage within a period of the operating voltage in the operating state.

An inductive cooktop includes a transparent panel arranged to support a cookware object, and an electrically actuated display panel disposed below the transparent panel. The display panel includes a first set of lines and a second set of lines disposed orthogonally and forming a 2D matrix arranged to operate picture elements at intersections of the first and second sets of lines, where each picture element is refreshed at a refresh rate. An induction coil is below the display panel to generate a time varying electromagnetic field that inductively couples with the cookware object supported at the transparent panel. A driver is in electronic communication with the induction coil for providing power to the induction coil. The refresh rate is synchronized to the time varying electromagnetic field to minimize an induced voltage on one of the first and second set of lines of the display panel.

An induction cooking hob comprising a control unit and at least one cooking zone, wherein the cooking zone includes at least three induction coils, and wherein at least one first group of one or more induction coils, and at least one second group of two or more induction coils of said at least one cooking zone are alternatingly activatable or activated by the control unit.