An induction well includes a tank configured to store a substance, a first induction coil positioned around a first portion of the tank, a second induction coil positioned around a second portion of the tank, and a single power inverter coupled in parallel with the first induction coil and the second induction coil.

An induction well includes a tank configured to store a substance, a first induction coil positioned around a first portion of the tank, a second induction coil positioned around a second portion of the tank, and a single power inverter coupled in parallel with the first induction coil and the second induction coil.

The present disclosure relates to an induction range of an upper and lower heating type having an advantage of simply cooking a cooking object such as instant food packaged in a food packaging box in a short time, making food taste good by alternately heating upper and lower parts of the cooking object, preventing an electric control device from being burned out by applying an alternating heating type for excluding mutual induction interference between an upper heating unit and a lower heating unit for heating the cooking object, and preventing a burn occurring at the time of gripping the heated cooking object and promoting cleanliness by installing a separate cooling device used for cooling the cooking object or for deodorizing the cooking object.

The present disclosure relates to an induction range of an upper and lower heating type having an advantage of simply cooking a cooking object such as instant food packaged in a food packaging box in a short time, making food taste good by alternately heating upper and lower parts of the cooking object, preventing an electric control device from being burned out by applying an alternating heating type for excluding mutual induction interference between an upper heating unit and a lower heating unit for heating the cooking object, and preventing a burn occurring at the time of gripping the heated cooking object and promoting cleanliness by installing a separate cooling device used for cooling the cooking object or for deodorizing the cooking object.

An aerosol generating device, including an inductance channel, includes: a heater configured to generate an aerosol by heating a cigarette; a cigarette insertion space into which the cigarette is inserted; a first inductance channel; a second inductance channel; and a controller configured to generate a control signal by using information received from the first inductance channel and the second inductance channel, wherein the controller measures, when an amount of a change in frequency of current flowing through the first inductance channel exceeds a first reference value due to an object adjacent to the cigarette insertion space, an amount of a change in frequency of current flowing through the second inductance channel and controls, when the measured amount of the change in frequency of the current is less than a second reference value, a power supply to the heater to be started.

An aerosol generating device, including an inductance channel, includes: a heater configured to generate an aerosol by heating a cigarette; a cigarette insertion space into which the cigarette is inserted; a first inductance channel; a second inductance channel; and a controller configured to generate a control signal by using information received from the first inductance channel and the second inductance channel, wherein the controller measures, when an amount of a change in frequency of current flowing through the first inductance channel exceeds a first reference value due to an object adjacent to the cigarette insertion space, an amount of a change in frequency of current flowing through the second inductance channel and controls, when the measured amount of the change in frequency of the current is less than a second reference value, a power supply to the heater to be started.

The invention relates to a method and a heating device (1c) for inductively heating a stator (2) or armature (3) of an electric machine, in particular before and during trickle impregnation thereof. In addition, the invention relates to an impregnating device (50) in which this heating device (1c) is integrated. According to the invention, it is provided that the heating takes place inductively by electromagnetic fields of different frequencies. For this purpose, it is provided in the case of the heating device (1c) that it has at least one electromagnetic inductor (18, 21, 24) which is disposed coaxially or axially parallel with respect to the longitudinal axis (7) of the stator (2) or armature (3) and which inductively heats said stator or armature, and that the at least one inductor (18, 21, 24) is designed to generate at least two electromagnetic fields of different frequencies.

The invention relates to a method and a heating device (1c) for inductively heating a stator (2) or armature (3) of an electric machine, in particular before and during trickle impregnation thereof. In addition, the invention relates to an impregnating device (50) in which this heating device (1c) is integrated. According to the invention, it is provided that the heating takes place inductively by electromagnetic fields of different frequencies. For this purpose, it is provided in the case of the heating device (1c) that it has at least one electromagnetic inductor (18, 21, 24) which is disposed coaxially or axially parallel with respect to the longitudinal axis (7) of the stator (2) or armature (3) and which inductively heats said stator or armature, and that the at least one inductor (18, 21, 24) is designed to generate at least two electromagnetic fields of different frequencies.

An induction heating device includes a case, working coils, a cover plate, an input interface, a first control module configured to detect one or more of the working coils at a position of an object seated on the cover plate, a second control module configured to receive information on the position of the object and control the input interface to display an image of a heating zone, and light emitting elements disposed below a periphery of each of the plurality of working coils. The second control module is configured to analyze an arrangement form of the one or more of the working coils based on the information on the position of the object, and control driving of at least one of the light emitting elements based on a result of analyzing the arrangement form.

An induction heating device includes a case, working coils, a cover plate, an input interface, a first control module configured to detect one or more of the working coils at a position of an object seated on the cover plate, a second control module configured to receive information on the position of the object and control the input interface to display an image of a heating zone, and light emitting elements disposed below a periphery of each of the plurality of working coils. The second control module is configured to analyze an arrangement form of the one or more of the working coils based on the information on the position of the object, and control driving of at least one of the light emitting elements based on a result of analyzing the arrangement form.