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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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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：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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Patent Agency Ranking
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：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：US11233446B2
公开(公告)日：2022-01-25
申请号：US17082450
申请日：2020-10-28
Applicant: LG ELECTRONICS INC.
Inventor： Younghwan Kwack , Seongho Son , Seonho Jeon , Chuhyoung Cho , Jongseong Ji
Abstract: A method is provided for operating a resonant power conversion apparatus The method may include charging a capacitor connected to a power source in parallel, and determining a discharge time point and a discharge period of a discharge circuit, where the discharge circuit includes a resistor and a switch connected in series and is connected to the capacitor in parallel. The method may also include outputting, by a switch control circuit, a switch control signal by determining the switch control signal based on the discharge time point and the discharge period, and discharging the charged capacitor through the resistor based on the switch control signal applied to the switch. A resonant power conversion apparatus for performing the above-described method is provided.
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公开(公告)号：US11849525B2
公开(公告)日：2023-12-19
申请号：US17027071
申请日：2020-09-21
Applicant: LG Electronics Inc.
Inventor： Chuhyoung Cho , Seongho Son , Younghwan Kwack , Seonho Jeon , Jongseong Ji
CPC classification number: H05B6/1272 , H05B6/065
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：US20210313871A1
公开(公告)日：2021-10-07
申请号：US17082450
申请日：2020-10-28
Applicant: LG ELECTRONICS INC.
Inventor： Younghwan KWACK , Seongho Son , Seonho Jeon , Chuhyoung Cho , Jongseong JI
IPC: H02M1/08
Abstract: A method is provided for operating a resonant power conversion apparatus The method may include charging a capacitor connected to a power source in parallel, and determining a discharge time point and a discharge period of a discharge circuit, where the discharge circuit includes a resistor and a switch connected in series and is connected to the capacitor in parallel. The method may also include outputting, by a switch control circuit, a switch control signal by determining the switch control signal based on the discharge time point and the discharge period, and discharging the charged capacitor through the resistor based on the switch control signal applied to the switch. A resonant power conversion apparatus for performing the above-described method is provided.
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