公开(公告)号：US20230217556A1

公开(公告)日：2023-07-06

申请号：US18093129

申请日：2023-01-04

Applicant: LG ELECTRONICS INC.

Inventor： Kyelyong KANG ,  John Kang ,  Jinwook Han

IPC: H05B6/08 ,  H05B6/06 ,  H05B6/42

CPC classification number: H05B6/08 ,  H05B6/062 ,  H05B6/42 ,  H05B2213/05

Abstract: An induction heating device according to an embodiment includes an inverter configured to supply an AC current to a working coil and includes a plurality of switches; a drive circuit configured to supply a switching signal for a switching operation of the plurality of switches to the inverter; and a controller configured to control driving of the working coil by supplying a control signal corresponding to a required power value of the working coil to the drive circuit. The controller may drive the working coil based on the required power value, receive a resonance current value of the working coil when the working coil is driven, calculate a container efficiency index based on an output power value of the working coil, the required power value, the resonance current value and a preset limit current value, and control the driving of the working coil based on the container efficiency index.

公开(公告)号：US20220295604A1

公开(公告)日：2022-09-15

申请号：US17693687

申请日：2022-03-14

Applicant: LG ELECTRONICS INC.

Inventor： Kyelyong KANG ,  Ho Yong Jang

IPC: H05B6/06 ,  H05B6/36 ,  H05B6/44

Abstract: A controller may measure resonance current of a working coil, measure driving voltage of a switching element included in an inverter circuit that supplies current to the working coil, and generates a phase margin pulse based on the resonance current and the driving voltage. The controller may compare the phase margin pulse with a switching signal and determine a driving state of the induction heating apparatus, and control driving of the working coil based on the driving state of the induction heating apparatus. Additionally, when it is determined that a driving frequency of the working coil is included in a capacitive area, the induction heating apparatus stops from operating, or a driving frequency of the working coil is set again.

公开(公告)号：US20220235993A1

公开(公告)日：2022-07-28

申请号：US17586007

申请日：2022-01-27

Applicant: LG ELECTRONICS INC.

Inventor： Wongyu PARK ,  Bada YOON ,  Kyelyong KANG

IPC: F25D17/08 ,  F25D21/04 ,  F25D21/00 ,  F25D21/08

Abstract: A refrigerator is proposed. Due to a first heater provided in a damper assembly, a damper assembly or the connection portion of the damper assembly with a supply duct is prevented from freezing, and due to a second heater provided in the supply duct, the connection portion of the supply duct with the damper assembly or the inside of the supply duct is prevented from freezing.

公开(公告)号：US20210352772A1

公开(公告)日：2021-11-11

申请号：US17313354

申请日：2021-05-06

Applicant: LG ELECTRONICS INC. ,  UNIST (ULSAN NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY)

Inventor： Sihoon JEONG ,  Kyelyong KANG ,  Jinwook HAN ,  Hwa Pyeong PARK ,  Jee Hoon JUNG

IPC: H05B6/06 ,  H02M7/5387 ,  H05B6/12

Abstract: An induction heating apparatus according to one embodiment may confirm a feature of a container and determine an operation mode based on the feature of the container before performing an operation of heating the container. In one embodiment, the operation mode of the induction heating apparatus may be determined as any one of a frequency doubler mode, a half bridge mode, and a full bridge mode. In one embodiment, a power control mode of the induction heating apparatus may be determined based on an operation mode of the induction heating apparatus. In one embodiment, the power control mode of the induction heating apparatus may be determined as any one of an asymmetric pulse width modulation (APWM) mode and a phase shift mode.