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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：US11140752B2
公开(公告)日：2021-10-05
申请号：US16276180
申请日：2019-02-14
Applicant: LG Electronics Inc.
Inventor： Hyojin Choi , Seongho Son , Jaekyung Yang , Yongsoo Lee
Abstract: An induction heating device includes: a casing; a cover plate coupled to a top of the casing, where the cover plate has a surface configured to seat an object; a first induction heating module located within the casing and configured to heat the object; a first wiring substrate that is configured to couple to a bottom of the first induction heating module and that extends in a first direction, where the first wiring substrate includes at least one of a power line or a signal line; and a first connector that is configured to couple the first wiring substrate to the bottom of the first induction heating module, where the first connector includes a pogo pin.
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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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公开(公告)号：US10917947B2
公开(公告)日：2021-02-09
申请号：US15843862
申请日：2017-12-15
Applicant: LG Electronics Inc.
Inventor： Seongho Son , Jaekyung Yang , Hyojin Choi , Yongsoo Lee
Abstract: An induction heat cooking apparatus includes a rectifier configured to convert an AC voltage supplied from a power source into a DC voltage, a battery configured to store power, a switch configured to connect to at least one of the rectifier or the battery, an inverter connected to the switch and configured to receive a first voltage from at least one of the rectifier or the battery and convert the first voltage to a second voltage, and a heating coil configured to receive the second voltage from the inverter and generate magnetic fields in which the heating coil is configured to heat a cooking device based on the generated magnetic fields.
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公开(公告)号：US11665793B2
公开(公告)日：2023-05-30
申请号：US16903973
申请日：2020-06-17
Applicant: LG Electronics Inc.
Inventor： Wontae Kim , Hyunwoo Jun , Jaekyung Yang , Sunghun Sim , Seongho Son
CPC classification number: H05B6/647 , H05B3/0014 , H05B6/105 , H05B6/129 , H05B6/6402 , H05B6/6482 , H05B6/6488 , H05B6/707
Abstract: A cooking appliance includes a housing that defines a cavity therein, a door connected to the housing and configured to open and close the cavity, a microwave (MW) heating module configured to emit microwaves into the cavity, and an induction heating (IH) module configured to emit a magnetic field towards the cavity. The IH module includes a working coil that is configured to generate the magnetic field and a thin film that is disposed between the cavity and the working coil.
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Patent Agency Ranking
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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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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19.发明授权公开(公告)号：US11140753B2
公开(公告)日：2021-10-05
申请号：US16687935
申请日：2019-11-19
Applicant: LG Electronics Inc.
Inventor： Seongjun Kim , Seongho Son , Yongsoo Lee
Abstract: An induction heating device includes: a case; working coils; a base plate that supports the working coils; light guides that are installed on the base plate and that cover outer portions of each working coil; light emitting elements disposed below the light guides and configured to emit light; and an indicator substrate that is disposed below the base plate and that seats the light emitting elements. The indicator substrate includes a first indicator substrate, where a first portion of the light emitting elements are arranged along outer portions of the first indicator substrate, and a second indicator substrate disposed at a rear side of the first indicator substrate, where a second portion of the light emitting elements are arranged along outer portions of the second indicator substrate except for an outer portion at a front side that is adjacent to and faces the rear side of the first indicator substrate.
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公开(公告)号：US11064577B2
公开(公告)日：2021-07-13
申请号：US16196559
申请日：2018-11-20
Applicant: LG Electronics Inc.
Inventor： Younghwan Kwack , Seongho Son , Jaekyung Yang , Yongsoo Lee
Abstract: An induction heating device includes: a working coil set including a first working coil connected to a first resonant capacitor and a second working coil connected to a second resonant capacitor; an inverter that performs a switching operation to apply a resonant current to at least one of the first or second working coil; a current transformer that adjusts a magnitude of the resonant current and that transmits the resonant current having the adjusted magnitude to the working coil set; a first relay that selectively connects a first end of the second working coil to the current transformer or the second resonant capacitor; a second relay that selectively connects a to second end of the second working coil to an end of the first working coil or the second resonant capacitor; and a control unit configured to control operations of the inverter and the first and second relays, respectively.
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