公开(公告)号：US20240306269A1

公开(公告)日：2024-09-12

申请号：US18288898

申请日：2021-07-13

Applicant: LG ELECTRONICS INC.

Inventor： Younghwan KWACK ,  Seongho SON ,  Yongsoo LEE ,  Jaekyung YANG

IPC: H05B6/06 ,  H05B6/12

CPC classification number: H05B6/065 ,  H05B6/1272 ,  H05B2213/05

Abstract: An induction heating type cooktop can include an upper plate configured to support an object to be heated, an intermediate heating element overlapping with the upper plate, a first working coil and a second working coil configured to generate magnetic fields that pass through at least one of the object or the intermediate heating element, and an inverter configured to control a first direction of first current flowing through the first working coil and a second direction of second current flowing through the second working coil. Also, an area of a loop generated by current induced in the intermediate heating element varies according to a type of the object.

公开(公告)号：US20240188195A1

公开(公告)日：2024-06-06

申请号：US18441580

申请日：2024-02-14

Applicant: LG Electronics Inc. ,  ULSAN NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Younghwan KWACK ,  Jaekyung YANG ,  Seongho SON ,  Yongsoo LEE ,  Jeehoon JUNG ,  Hwapyeong PARK ,  Mina KIM

IPC: H05B6/06 ,  F24C15/10 ,  H02M3/06 ,  H02M7/10 ,  H05B1/02 ,  H05B6/12

CPC classification number: H05B6/065 ,  F24C15/106 ,  H02M3/06 ,  H02M7/103 ,  H05B1/0202 ,  H05B6/062 ,  H05B6/1236 ,  Y02B40/00

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.

公开(公告)号：US20210259061A1

公开(公告)日：2021-08-19

申请号：US17006549

申请日：2020-08-28

Applicant: LG Electronics Inc.

Inventor： Younghwan KWACK ,  Seongho SON ,  Seonho JEON ,  Jongseong JI ,  Chuhyoung CHO

IPC: H05B6/06 ,  H05B6/12

Abstract: An induction heating type cooktop includes: an upper plate coupled to a top of a case, the upper plate being configured to support a target object, a working coil provided in the case and configured to heat the 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 first temperature sensor configured to measure a temperature of the thin film, a second temperature sensor configured to measure a temperature of the upper plate, and a controller. The controller is configured to control the working coil to heat the target object based on a target output, and control an output of the working coil based on the measured temperature of the thin film and the measured temperature of the upper plate.

公开(公告)号：US20200154529A1

公开(公告)日：2020-05-14

申请号：US16678781

申请日：2019-11-08

Applicant: LG Electronics Inc.

Inventor： Younghwan KWACK ,  Seongho SON ,  Jaekyung YANG ,  Yongsoo LEE

IPC: H05B6/06

Abstract: Described is a method for controlling an induction heating device having one or more working coils and a controller configured to perform pre-testing based on a single pulse. The method includes: selecting a working coil to be tested, performing a detection operation to detect a vessel disposed on the working coil and generate a first output pulse; comparing at least one of: a count of the first output pulse to a predetermined reference count range, or an on-duty time of the first output pulse to a predetermined reference time range; and adjusting, by the controller, a duration of an on-state of the single pulse based on (i) a result of the comparison of the count of the first output pulse to the predetermined reference count range or (ii) a result of the comparison of the on-duty time of the first output pulse to the predetermined reference time range.

公开(公告)号：US20200029398A1

公开(公告)日：2020-01-23

申请号：US16390686

申请日：2019-04-22

Applicant: LG ELECTRONICS INC.

Inventor： Younghwan KWACK ,  Seongho SON ,  Jaekyung YANG ,  Yongsoo LEE

IPC: H05B6/06 ,  H05B6/12

Abstract: A method for sensing a container includes: charging an induction heating circuit; sensing a current applied to the induction heating circuit, converting a current value of the current into a first voltage value; comparing the first voltage value with a resonance reference value; generating a resonance of the current; sensing a resonant current generated in the induction heating circuit; converting the resonant current into a second voltage value; comparing the second voltage value with a count reference value; generating one or more output pulses; comparing a count of the one or more output pulses with a reference count, or comparing an on-duty time of the one or more output pulses with a reference time; and based on (i) the comparison of the count with the reference count or (ii) the comparison of the on-duty time with the reference time, determining whether an object is present on a working coil.

公开(公告)号：US20250048506A1

公开(公告)日：2025-02-06

申请号：US18923047

申请日：2024-10-22

Applicant: LG Electronics Inc.

Inventor： Younghwan KWACK ,  Jongseong JI ,  Seongho SON ,  Seonho JEON ,  Chuhyoung CHO

IPC: H05B6/06 ,  H05B6/04 ,  H05B6/12

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.

公开(公告)号：US20240381497A1

公开(公告)日：2024-11-14

申请号：US18660674

申请日：2024-05-10

Applicant: LG ELECTRONICS INC.

Inventor： Younghwan KWACK ,  Seongho SON ,  Jongseong JI

IPC: H05B6/40 ,  H05B6/04 ,  H05B6/06 ,  H05B6/12

Abstract: A cooking appliance can include a top plate configured to support an object to be heated, a plurality of working coils configured to heat the object, a plurality of inverters configured to apply current to at least one of the plurality of working coils, and a controller configured to heat the object via at least one heating area among a first heating area, a second heating area and a third heating area, in which the first heating area corresponds to at least a first working coil among the plurality of working coils, the second heating area corresponds to at least a second working coil among the plurality of working coils, and the third heating area corresponds to a third working coil among the plurality of working coils.

公开(公告)号：US20240215124A1

公开(公告)日：2024-06-27

申请号：US18288904

申请日：2022-03-21

Applicant: LG ELECTRONICS INC.

Inventor： Younghwan KWACK ,  Seongho SON ,  Seonho JEON ,  Chuhyoung CHO ,  Jongseong JI ,  Jaekyung YANG ,  Yongsoo LEE

IPC: H05B6/12 ,  H05B6/06

CPC classification number: H05B6/1272 ,  H05B6/065

Abstract: An induction heating type cooktop can include an upper plate configured to support an object to be heated, an intermediate heating element overlapping with the upper plate, a plurality of working coils configured to generate magnetic fields that pass through at least one of the object or the intermediate heating element, and a resonance capacitor configured to resonate with one or more of the plurality of working coils. Also, the induction heating type cooktop can include an inverter configured to apply current to at least one of the plurality of working coils and a switch configured to selectively connect at least one of the plurality of working coils to the inverter.

公开(公告)号：US20200158905A1

公开(公告)日：2020-05-21

申请号：US16687940

申请日：2019-11-19

Applicant: LG Electronics Inc.

Inventor： Younghwan KWACK ,  Seongho SON ,  Jaekyung YANG ,  Yongsoo LEE

IPC: G01V3/10 ,  H05B6/06

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.

公开(公告)号：US20190327794A1

公开(公告)日：2019-10-24

申请号：US16196559

申请日：2018-11-20

Applicant: LG Electronics Inc.

Inventor： Younghwan KWACK ,  Seongho SON ,  Jaekyung YANG ,  Yongsoo LEE

IPC: H05B6/06 ,  H05B6/12 ,  H05B6/40

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.