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公开(公告)号：US12156318B2
公开(公告)日：2024-11-26
申请号：US17006464
申请日：2020-08-28
Applicant: LG Electronics Inc.
Inventor： Younghwan Kwack , Jongseong Ji , Seongho Son , Seonho Jeon , Chuhyoung Cho
Abstract: An induction heating type cooktop includes: a case, a cover plate coupled to a top of the case and having an upper plate that is configured to support a target object, a thin film disposed on at least one of a top of the upper plate or a bottom of the upper plate, a working coil provided in the case and configured to inductively heat the thin film, a memory storing information on one or more correlations between a temperature of the thin film and a plurality of components of an equivalent circuit associated with the thin film, the plurality of components including an inductor component and a resistor component, and a controller configured to operate the working coil and determine estimated temperature information corresponding to the inductor component and the resistor component of the equivalent circuit.
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公开(公告)号：US10973091B2
公开(公告)日：2021-04-06
申请号：US16054372
申请日：2018-08-03
Applicant: LG Electronics Inc.
Inventor： Seongho Son , Taewoong Kong , Younghwan Kwack , Jaekyung Yang , Yongsoo Lee , Hyojin Choi
Abstract: Disclosed herein is an induction heat cooking apparatus including a power supply configured to supply an alternating current (AC) voltage, a rectifier configured to rectify the supplied AC voltage into a direct current (DC) voltage, first and second switching units configured to control switching such that the DC voltage from the rectifier is alternately applied to a working coil, a comparison unit configured to sense current flowing in the working coil and to compare the sensed current with a predetermined reference value to output pulses, and a controller configured to determine whether a cooking vessel is present on the working coil based on the output pulses.
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公开(公告)号：US12200848B2
公开(公告)日：2025-01-14
申请号：US18501911
申请日：2023-11-03
Applicant: LG Electronics Inc.
Inventor： Chuhyoung Cho , Seongho Son , Younghwan Kwack , Seonho Jeon , Jongseong Ji
Abstract: An induction heating type cooktop includes a case, an upper plate coupled to a top of the case and configured to support an object, a working coil disposed inside the case and configured to heat the object, a thin film arranged at a top surface of the upper plate or a bottom surface of the upper plate, at least one temperature sensor configured to measure a temperature of at least one of components of the induction heating type cooktop, the components including the thin film, and a microcontroller unit (MCU) configured to drive the working coil and to control an output of the working coil based on whether the temperature satisfies at least one condition that is preset for the at least one of the components.
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公开(公告)号：US11470694B2
公开(公告)日：2022-10-11
申请号：US16390665
申请日：2019-04-22
Applicant: LG Electronics Inc.
Inventor： Younghwan Kwack , Kyelyong Kang , Seongho Son , Seonho Jeon
Abstract: An induction heating device includes an induction heating circuit, a sensor configured to measure current applied to the induction heating circuit, and a controller. The controller includes: a switch driving unit configured to control operation of an inverter unit and to allow a resonance of the current, a container sensing unit, and a control unit. The container sensing unit is configured to: convert a first current value before the resonance into a first voltage value; control the switch driving unit to charge a working coil; compare the first voltage value with a resonance reference value; convert a second current value after the resonance into a second voltage value; generate one or more output pulses; and compare the second voltage value with a count reference value. The control unit is configured to determine whether an object is present on the working coil based on the one or more output pulses.
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公开(公告)号：US10925123B2
公开(公告)日：2021-02-16
申请号：US15862537
申请日：2018-01-04
Inventor： Younghwan Kwack , Jaekyung Yang , Seongho Son , Yongsoo Lee , Jeehoon Jung , Hwapyeong Park , Mina Kim
Abstract: An induction heat cooking apparatus that includes: a rectifier that is configured to convert alternating current (AC) voltage supplied from an external power source into direct current (DC) voltage; an inverter that is configured to generate current based on DC voltage received from the rectifier and provide the current to output nodes; heating coils that are configured to, based on the current generated by the inverter, generate magnetic fields for providing heat; a first capacitive unit that includes one or more resonance capacitors and that is coupled between the output nodes; a second capacitive unit that includes one or more wireless power transfer (WPT) capacitors and that is configured to be coupled between the output nodes; and a mode conversion switch that is configured to couple the second capacitive unit to the first capacitive unit in parallel is disclosed.
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Patent Agency Ranking
公开(公告)号：US11729867B2
公开(公告)日：2023-08-15
申请号：US16849584
申请日：2020-04-15
Applicant: LG Electronics Inc.
Inventor： Seonho Jeon , Seongho Son , Younghwan Kwack , Chuhyoung Cho , Jongseong Ji
CPC classification number: H05B6/062 , F24C15/104 , F24C15/105 , H05B1/0266 , H05B6/1245 , H05B2213/07
Abstract: An induction heating type cooktop includes an upper plate coupled to a top side of a case and configured to place an object to be heated on a top of the upper plate, a working coil disposed inside the case to heat the object, a thin film disposed on at least one of a top surface or a bottom surface of the upper plate, an insulator disposed between the bottom surface of the upper plate and the working coil, and a temperature sensor configured to measure a temperature of at least one of the thin film or the upper plate by a plurality of thermocouples.
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7.发明授权公开(公告)号：US11175429B2
公开(公告)日：2021-11-16
申请号：US16687940
申请日：2019-11-19
Applicant: LG Electronics Inc.
Inventor： Younghwan Kwack , Seongho Son , Jaekyung Yang , Yongsoo Lee
Abstract: A method controls an induction heating device that is configured to operate based on a multi-phase power supply and that includes a working coil configured to heat an object and a controller configured to detect the object. The method includes: receiving voltage information related to a first input voltage and a second input voltage that are supplied by the multi-phase power supply and that have different phases from each other; selecting a reference voltage among the first input voltage and the second input voltage based on the voltage information; determining a detection time point, which corresponds to a time instant at which a detection operation is to be performed for detecting the object on the working coil, based on the reference voltage; and performing the detection operation at the detection time point.
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公开(公告)号：US11153942B2
公开(公告)日：2021-10-19
申请号：US16198194
申请日：2018-11-21
Applicant: LG Electronics Inc.
Inventor： Hyo Jin An , Younghwan Kwack , Seongho Son , Jaekyung Yang , Yongsoo Lee
Abstract: 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.
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公开(公告)号：US11569729B2
公开(公告)日：2023-01-31
申请号：US16987818
申请日：2020-08-07
Applicant: LG ELECTRONICS INC.
Inventor： Seonho Jeon , Seongho Son , Younghwan Kwack , Chuhyoung Cho , Jongseong Ji
Abstract: Provided is a resonant power conversion apparatus including a gate control circuit that controls a first switch to enter an On state and a second switch to enter an Off state at a first stage and controls the first switch to enter the Off state and the second switch to enter the On state at a second stage, a first current transformer that applies current to the first switch at the first stage and applies current to the second switch at the second stage, a load connected to the first current transformer in series, a second current transformer connected to the second switch, and a microcontroller unit (MCU) that determines whether to be zero voltage switching or non-zero voltage switching based on a current flowing in the first current transformer and the second current transformer in a process of transitioning from the first stage to the second stage.
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公开(公告)号：US11265973B2
公开(公告)日：2022-03-01
申请号：US16180593
申请日：2018-11-05
Applicant: LG Electronics Inc.
Inventor： Younghwan Kwack , Seongho Son , Jaekyung Yang , Yongsoo Lee
Abstract: An induction heating device includes: a first board including a first working coil, a first inverter configured to apply a resonant current to the first working coil, a first current transformer configured to adjusting a magnitude of the first resonant current, a first control unit configured to control the first inverter; and a second board including a second working coil, a second inverter configured to apply a resonant current to the second working coil, a second current transformer configured to adjust a magnitude of the second resonant current, a first relay configured to selectively connect the second working coil to the second current transformer or to the first working coil, a second relay configured to selectively connect the second working coil to the first working coil or to the second resonant capacitor, and a second control unit configure to control the second inverter, the first relay, and the second relay.
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