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WO2025143827A1 - Dispositif de chauffage par induction et procédé de commande de dispositif de chauffage par induction - Google Patents

Dispositif de chauffage par induction et procédé de commande de dispositif de chauffage par induction Download PDF

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Publication number
WO2025143827A1
WO2025143827A1 PCT/KR2024/021199 KR2024021199W WO2025143827A1 WO 2025143827 A1 WO2025143827 A1 WO 2025143827A1 KR 2024021199 W KR2024021199 W KR 2024021199W WO 2025143827 A1 WO2025143827 A1 WO 2025143827A1
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WO
WIPO (PCT)
Prior art keywords
working coil
output
heating device
induction heating
load
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/KR2024/021199
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English (en)
Korean (ko)
Inventor
성호재
옥승복
조주형
박병욱
구민주
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
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Filing date
Publication date
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Publication of WO2025143827A1 publication Critical patent/WO2025143827A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/04—Sources of current
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices

Definitions

  • This specification relates to an induction heating device and a method for controlling the induction heating device.
  • An induction heating device is a device that heats a container by generating an eddy current in a metal container using a magnetic field generated around a working coil.
  • an alternating current is applied to the working coil.
  • an induced magnetic field is generated around the working coil placed inside the induction heating device.
  • the magnetic force line of the induced magnetic field passes through the bottom of the container including the metal component placed above the working coil, an eddy current is generated inside the bottom of the container.
  • the container is heated.
  • An example of such conventional techniques is a probe-type temperature sensor for measuring the temperature of a load inside a vessel.
  • the probe-type temperature sensor has the problems of being complicated to use, deteriorating the hygiene of the load inside the vessel, and requiring frequent charging of the temperature sensor.
  • an induction heating device having a built-in vibration sensor for measuring the vibration of a container that occurs as the load reaches the boiling point.
  • the types of containers that can detect the boiling state of the load by the induction heating device having a built-in vibration sensor are very limited. Therefore, the user has to check the types of containers one by one, which is inconvenient, and if the user does not use an appropriate container, the boiling state of the load may not be detected at all.
  • the purpose of this specification is to provide an induction heating device and a control method of the induction heating device which can accurately notify a user that a load inside a container has reached a boiling state through simple operation without degrading the hygiene of the load inside the container.
  • the purpose of this specification is to provide an induction heating device and a control method of the induction heating device which can accurately notify a user that a load inside a container has reached a boiling state without a separate sensor or component.
  • the purpose of this specification is to provide an induction heating device and a control method of the induction heating device which can accurately notify a user when a load inside a container has reached a boiling state for a wider variety of containers.
  • the purpose of this specification is to provide an induction heating device and a control method of the induction heating device capable of maintaining a load in a boiling state without increasing the temperature of the load when the load reaches a boiling state even when the user does not monitor the state of the load.
  • An induction heating device may include an upper portion including a heating region and a manipulation region, a working coil disposed at a position corresponding to the heating region, an inverter including a plurality of switching elements and supplying current to the working coil, a driving circuit supplying a switching signal to each switching element included in the inverter, and a controller determining a driving frequency of the inverter and supplying a control signal based on the driving frequency to the driving circuit to drive the working coil.
  • the controller may receive a load amount of a load within a container provided above the working coil, calculate a heating index of the container, determine an output profile corresponding to the load amount and the heating index, and perform an output control operation for the working coil according to the output profile.
  • the output profile may include a plurality of output control conditions and a power level corresponding to each output control condition.
  • the output control condition may be determined based on at least one of a temperature prediction value for the load and an integrated power value of the working coil.
  • Figure 4 illustrates a number of output profiles selected based on a user-entered load.
  • the output profile of Fig. 4 may include only the heating indices (10, 9, 8, 7) of the container for which the output control operation can be performed.
  • a predetermined reference index e.g. 7
  • the range and numerical value of the heating index of the container included in the output profile may vary depending on the embodiment.
  • the output profile of FIG. 4 may include multiple output control points (S0, S1, S2, S3).
  • the output control points may include an output regulation start point (S0), a first output regulation point (S1), a second output regulation point (S2), and an output regulation end point (S3).
  • the number of output control points may be set differently depending on the embodiment.
  • the output profile of Fig. 4 may include output control conditions corresponding to each output control point (S1, S2, S3).
  • the output control condition can be set based on at least one of a temperature prediction value and an integrated power value.
  • the temperature prediction value means the temperature value of the load inside the container predicted or estimated by the controller (2) at a specific point in time when the container is heated.
  • the controller (2) can generate a temperature prediction value for the temperature of the load inside the container when the container is heated by using a temperature prediction model generated in advance through machine learning.
  • the input factors of the temperature prediction model used at this time may include the amount of load, the output power value of the working coil, the heating time, etc., but the input factors used in the temperature prediction model are not limited thereto, and various other input factors may be used to estimate the temperature value of the load inside the container depending on the embodiment.
  • a different temperature prediction model may be used to generate the temperature prediction value depending on the embodiment.
  • the accumulated power value means a value calculated by accumulating the output power value of the working coil measured from the time when the driving of the working coil begins, by a predetermined time unit.
  • the accumulated power value means the amount of power consumed by the working coil from the time when the driving of the working coil begins to a specific time.
  • AA1 The temperature prediction value is 85°C and the accumulated power value is 1440W.
  • AA2 The temperature prediction value is 90°C and the accumulated power value is 1570W.
  • AA3 The temperature prediction value is 98°C and the accumulated power value is 1689W.
  • the controller (2) can calculate the temperature prediction value and the accumulated power value at predetermined time units (e.g., 1 second).
  • the controller (2) can determine whether each output control point (S1, S2, S3) is reached by referring to the first output profile. Accordingly, the point in time when the temperature prediction value reaches 85°C and the accumulated power value reaches 1440 W during the container heating process becomes the first output control point (S1). In addition, the point in time when the temperature prediction value reaches 90°C and the accumulated power value reaches 1570 W becomes the second output control point (S2). In addition, the point in time when the temperature prediction value reaches 98°C and the accumulated power value reaches 1689 W becomes the output control end point (S3).
  • the output control condition corresponding to the output control end point (S3) may also be referred to as an output control end condition.
  • the output control conditions for defining the output control point may be set differently depending on the embodiment.
  • the output control conditions may be set only by the temperature prediction value or only by the integrated power value.
  • the output control conditions may be defined by a value other than the temperature prediction value or the integrated power value.
  • the controller (2) can select the second output profile among the output profiles shown in Fig. 4.
  • the output control conditions of the second output profile can be set as follows, for example.
  • the controller (2) can determine whether each output control point (S1, S2, S3) is reached by referring to the second output profile. Accordingly, the point in time when the temperature prediction value reaches 85°C during the container heating process becomes the first output control point (S1). In addition, the point in time when the temperature prediction value reaches 90°C becomes the second output control point (S2). In addition, the point in time when the temperature prediction value reaches 98°C becomes the output control end point (S3).
  • the output control condition corresponding to the output control end point (S3) may also be referred to as an output control end condition.
  • the controller (2) can select the second output profile among the output profiles shown in Fig. 4.
  • the output control conditions of the second output profile can be set as follows, for example.
  • the controller (2) can produce a temperature prediction value at predetermined time units (e.g., 1 second).
  • the controller (2) can determine whether each output control point (S1, S2, S3) is reached by referring to the second output profile. Accordingly, the point in time when the accumulated power value reaches 2400 W during the container heating process becomes the first output control point (S1). In addition, the point in time when the accumulated power value reaches 2800 W becomes the second output control point (S2). In addition, the point in time when the accumulated power value reaches 3133 W becomes the output control end point (S3).
  • the output control condition corresponding to the output control end point (S3) may also be referred to as an output control end condition.
  • each output profile in FIG. 4 may include a power level of the working coil according to a combination of the heating index of the container and the output control points (S0, S1, S2, S3).
  • the controller (2) may adjust or change the power level of the working coil to the power level (9, 8, 6, 6) recorded in the first output profile of FIG. 4 for each output point (S0, S1, S2, S3).
  • the heating index defined in each output profile and the power level corresponding to each output control point may be set differently depending on the embodiment.
  • a voice may be output through a speaker included in the induction heating device (10) to notify the user of the arrival of each output control point (S0, S1, S2, S3).
  • a voice such as “The heat is adjusted so that the food does not overflow” may be output through the speaker of the induction heating device (10).
  • a voice such as “The food is boiling, so the smart heating operation is ended” may be output through the speaker of the induction heating device (10).
  • An example of an output control operation performed by the controller (2) according to the output profile illustrated in Fig. 4 is as follows.
  • the user presses the second load amount input button (332) to input the load amount (1.0 L) of the container.
  • the controller (2) calculates the heating index of the container provided on the first working coil (132).
  • the output control conditions of the second output profile can be defined as follows.
  • the temperature prediction value is 90°C and the accumulated power value is 2800W.
  • the temperature prediction value is 98°C and the accumulated power value is 3133W.
  • the controller (2) performs an output control operation according to the second output profile illustrated in Fig. 4.
  • the controller (2) first sets the power level of the first working coil (132) to a power level (9) corresponding to the output control start time (S0) of the output profile. Accordingly, the first working coil (132) is driven to output an output power value corresponding to the set power level (9), thereby starting heating of the container.
  • the controller (2) calculates a temperature prediction value and an integrated power value at predetermined time units (e.g., 1 second). When the calculated temperature prediction value reaches 85°C and the integrated power value reaches 2400 W, the controller (2) changes the power level of the first working coil (132) to 8. After the power level is changed to 8, when the calculated temperature prediction value reaches 90°C and the integrated power value reaches 2800 W, the controller (2) changes the power level of the first working coil (132) to 6.
  • the controller (2) ends the output regulation operation while maintaining the power level of the first working coil (132) at 6.
  • the controller (2) can reduce the power level of the working coil until the output regulation termination condition defined in the output profile is satisfied.
  • the controller (2) can perform a predetermined output maintenance operation.
  • the output maintenance action may include a predefined alarm action (e.g., an audio output via a speaker, a boil-over notification message or audio output via an application associated with the induction heating device).
  • a predefined alarm action e.g., an audio output via a speaker, a boil-over notification message or audio output via an application associated with the induction heating device.
  • the output maintenance operation may include an operation of maintaining the power level of the working coil at a power level corresponding to an output regulation end point (S3) defined in the output profile.
  • S3 output regulation end point
  • the power level of the first working coil (132) may be maintained at 6. Accordingly, the load inside the vessel provided on the first working coil (132) may be maintained in a boiling state.
  • the output maintenance operation may include an operation of turning off the load indication lamps (341, 342, 343).
  • the second load indication lamp (342) corresponding to the second load input button (332) may be turned off.
  • Fig. 5 is a flowchart illustrating a control method of an induction heating device according to one embodiment.
  • the controller (2) can calculate the heating index of the container provided on the working coil (504). In one embodiment, the controller (2) can calculate the heating index of the container according to [Mathematical Formula 2].
  • controller (2) can continuously calculate the accumulated power value (64) by accumulating the power consumption of the working coil while the container is heated.
  • heating of the container begins with only an action of inputting a load amount without the user setting a power level, and the power level of the working coil is automatically decreased until the load inside the container is in a boiling state.
  • the power level of the working coil can be maintained constant so that the power level of the working coil no longer increases and the load can be maintained in a boiling state.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)

Abstract

La présente invention concerne un dispositif de chauffage par induction et un procédé de commande du dispositif de chauffage par induction. Le dispositif de chauffage par induction selon un mode de réalisation peut comprendre : une unité de plaque supérieure comprenant une zone de chauffage et une zone de fonctionnement ; une bobine de travail disposée à une position correspondant à la zone de chauffage ; un onduleur comprenant une pluralité d'éléments de commutation et fournissant un courant à la bobine de travail ; un circuit d'attaque pour fournir un signal de commutation à chaque élément de commutation inclus dans l'onduleur ; et un dispositif de commande pour déterminer une fréquence d'attaque de l'onduleur et fournir un signal de commande sur la base de la fréquence d'attaque au circuit d'attaque de façon à attaquer la bobine de travail.
PCT/KR2024/021199 2023-12-28 2024-12-26 Dispositif de chauffage par induction et procédé de commande de dispositif de chauffage par induction Pending WO2025143827A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020230194877 2023-12-28
KR10-2023-0194877 2023-12-28

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Publication Number Publication Date
WO2025143827A1 true WO2025143827A1 (fr) 2025-07-03

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PCT/KR2024/021199 Pending WO2025143827A1 (fr) 2023-12-28 2024-12-26 Dispositif de chauffage par induction et procédé de commande de dispositif de chauffage par induction

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KR (1) KR20250103346A (fr)
WO (1) WO2025143827A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012221643A (ja) * 2011-04-06 2012-11-12 Panasonic Corp 誘導加熱調理器
JP2013125721A (ja) * 2011-12-16 2013-06-24 Panasonic Corp 誘導加熱装置
JP2016189245A (ja) * 2015-03-30 2016-11-04 パナソニックＩｐマネジメント株式会社 誘導加熱調理器
KR20210033622A (ko) * 2019-09-19 2021-03-29 풍림전자 주식회사 샤브샤브 조리기능을 갖는 인덕션 제어장치
KR20230048899A (ko) * 2021-10-05 2023-04-12 주식회사 디에이치에스글로벌 스마트 쿠킹 장치 및 그 장치의 제어 방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012221643A (ja) * 2011-04-06 2012-11-12 Panasonic Corp 誘導加熱調理器
JP2013125721A (ja) * 2011-12-16 2013-06-24 Panasonic Corp 誘導加熱装置
JP2016189245A (ja) * 2015-03-30 2016-11-04 パナソニックＩｐマネジメント株式会社 誘導加熱調理器
KR20210033622A (ko) * 2019-09-19 2021-03-29 풍림전자 주식회사 샤브샤브 조리기능을 갖는 인덕션 제어장치
KR20230048899A (ko) * 2021-10-05 2023-04-12 주식회사 디에이치에스글로벌 스마트 쿠킹 장치 및 그 장치의 제어 방법

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