Abstract: It is an object of the present invention to provide an induction heating apparatus that can enable a plurality of heating coil to perform heating by sharing a inverter having semiconductor switches in use, thereby adjusting a power without increasing losses of the semiconductor switches so much with respect to the respective heating coils, the present invention being configured such that the inverter alternately outputs drive signals respectively having each of two operating frequencies to the plurality of heating coils in every predetermined operation lapse of time and the plurality of heating coils are respectively connected to capacitance circuits in the inverter to have the different frequency characteristics.

Abstract: An induction heater includes a plurality of heating coils, a plurality of inverters, a plurality of switching circuits, command unit, sensor group, and container detection unit. The number of inverters supplying a high-frequency current to the heating coils is less than the number of heating coils. Each of the switching circuits switches an electric path of each of the heating coils such that each heating coil is connected or not connected to any of the inverters. The command unit controls driving of the inverters and switching of the switching circuits. Each sensor in the sensor group detects a response of a resonance circuit including the heating coil relative to power supply from the inverters. The container detection unit detects whether or not heating target is placed on the heating coil based on an output of the sensor. This enables to retain safety and reduce cost of the induction heater equipped with the plurality of heating coils.

Abstract: An induction heating cooker in which a size of heating coils can be freely set without being restricted by a size of an opening of a cabinet of a kitchen unit. The induction heating cooker has an outer casing including a flange extending in an outward direction from a top portion of a container receptacle, with a heating coil container space being provided between the flange and a plate, such that one portion of each of the heating coils is disposed in the heating coil container space.

Abstract: An induction heating apparatus according to the present invention includes: an inverter circuit which outputs an AC signal through ON and OFF operations of a plurality of switching devices; a control portion which drives and controls the plurality of switching devices; and a plurality of resonant circuits which includes respective resonant capacitors and respective heating coils for inductively heating an object to be heated; wherein the switching devices are driven and controlled, by using, as an operating range, a frequency range higher than a highest resonance frequency, or a frequency range lower than lowest resonance frequency, out of respective resonance frequencies of the plurality of resonant circuits, and the respective heating coils in the plurality of resonant circuits are combined to form at least a single induction heating source.

Abstract: It is an object of the present invention to provide an induction heating apparatus that can enable a plurality of heating coil to perform heating by sharing a inverter having semiconductor switches in use, thereby adjusting a power without increasing losses of the semiconductor switches so much with respect to the respective heating coils, the present invention being configured such that the inverter alternately outputs drive signals respectively having each of two operating frequencies to the plurality of heating coils in every predetermined operation lapse of time and the plurality of heating coils are respectively connected to capacitance circuits in the inverter to have the different frequency characteristics.

Abstract: An object of the present invention is to provide an induction heating cooker with which the size of heating coils can freely be set without being restricted by the size of an opening of a cabinet of a kitchen unit. To this end, the induction heating cooker of the present invention has its outer casing 15 structured to have a flange 7 extended in an outward direction from the top portion of a container receptacle 8, with a heating coil container space 16 being provided between the flange 7 and a plate 1, such that one portions of heating coils 2 and 3 are disposed in the space 16.