WO2017149111A1 - Appareil de cuisson à chauffage par induction doté d'un dispositif de chauffage à double bobine et procédé de détection de récipient - Google Patents

Appareil de cuisson à chauffage par induction doté d'un dispositif de chauffage à double bobine et procédé de détection de récipient Download PDF

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Publication number
WO2017149111A1
WO2017149111A1 PCT/EP2017/054988 EP2017054988W WO2017149111A1 WO 2017149111 A1 WO2017149111 A1 WO 2017149111A1 EP 2017054988 W EP2017054988 W EP 2017054988W WO 2017149111 A1 WO2017149111 A1 WO 2017149111A1
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WO
WIPO (PCT)
Prior art keywords
detection
heating
coil
vessel
common
Prior art date
Application number
PCT/EP2017/054988
Other languages
English (en)
Inventor
Metin OZTURK
Atakan SARIOGLU
Ulas OKTAY
Sercan SINIRLIOGLU
Original Assignee
Arcelik Anonim Sirketi
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Arcelik Anonim Sirketi filed Critical Arcelik Anonim Sirketi
Publication of WO2017149111A1 publication Critical patent/WO2017149111A1/fr

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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
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
    • H05B6/065—Control, e.g. of temperature, of power for cooking plates or the like using coordinated control of multiple induction coils
    • 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
    • H05B6/1209—Cooking devices induction cooking plates or the like and devices to be used in combination with them
    • H05B6/1245—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special coil arrangements
    • H05B6/1272—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special coil arrangements with more than one coil or coil segment per heating zone
    • 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
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/05—Heating plates with pan detection means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Definitions

  • the present invention relates to an induction heating cooker comprising a heater with concentric dual coils and to the vessel detection method.
  • induction heating cookers various induction coil structures are developed for heating vessels in different sizes.
  • the use of heaters with concentric dual induction coils are known in order to efficiently heat the vessels both with a large diameter and a small diameter on the same heating zone with homogeneous heat distribution.
  • the induction coils are energized and the heating process is performed.
  • the diameter of the vessel placed on the heating zone is small, the vessel covers only the inner induction coil and the inner induction coil is energized.
  • the vessel has a large diameter, the vessel covers both concentric induction coils and thus both induction coils are energized together.
  • the concentric induction coils are affected by the magnetic fields generated by the same and detection errors may occur.
  • different detection frequencies applied to the concentric induction coils driven by different power sources cause the generation of noises that disturb the user.
  • the errors in the vessel detection process cause excessive consumption of energy, delicate electronic components are damaged and the vessel cannot be properly heated.
  • the International Patent Application No. WO2015043650 relates to an induction heating cooktop comprising a dual-coil heater.
  • the European Patents No. EP1868417 and EP2342943 relate to an induction heating cooktop comprising a dual-coil heater.
  • the induction coils are energized by at least one control unit.
  • the European Patent No. EP1943878 relates to an induction cooking hob comprising a first heating zone with at least two induction coils independently energized by means of a power source and an additional heating zone energized by means of a second power source.
  • the aim of the present invention is the realization of an induction heating cooker comprising a heater with concentric dual induction coils disposed in a heating zone and wherein the vessel detection time is reduced, and the realization of a vessel detection method.
  • the process of detecting the vessel placed on the heating zone is started by sending a constant detection frequency first to the inner coil by means of the power control circuit whereto the coils are connected.
  • a common detection frequency for both the inner coil and the outer coil is determined according to the feedback received from the power control circuit whereto the inner coil is connected.
  • the detection process in the outer coil is started after the inner coil and the common detection frequency determined by the inner coil is applied to the outer coil.
  • the common heating frequency to be applied to both the inner coil and the outer coil at any power setting is determined according to the feedback received from the power control circuit whereto the inner coil is connected.
  • the time for detecting the vessel placed on the heating zone and thus the time for starting the heating at the desired power setting is shortened, hence providing energy saving and preventing the generation of noise.
  • Figure 1 - is the schematic perspective view of an induction cooker comprising the dual-coil heater.
  • Figure 2 – is the schematic view of the vessel detection method in the induction heating cooker.
  • Figure 3 – is the schematic view of the state where the vessel is not detected on the outer coil in the embodiment of Figure 2.
  • Figure 4 – is the schematic view of the vessel detection method in an embodiment of the present invention.
  • Figure 5 — is the schematic view of the state where the vessel is not detected on the outer coil in the embodiment of Figure 4.
  • Figure 6 — is the schematic view of the vessel detection method in another embodiment of the present invention.
  • Figure 7 — is the schematic view of the state where the vessel is not detected on the outer coil in the embodiment of Figure 6.
  • the induction heating cooker (1) comprises a heater (4) with an inner coil (2) and an outer coil (3) disposed concentrically in dual structure applying magnetic energy for heating a vessel placed on a heating zone (Z), two power control circuits (5) that enable the inner coil (2) and the outer coil (3) to be driven separately, and a microcontroller (6) that controls the operation of the power control circuits (5) ( Figure 1).
  • the induction heating cooker (1) when the vessel is placed on the heating zone (Z) and a power setting is adjusted, the presence of the vessel on the heater (4), in other words, only on the inner coil (2) or on both the inner and the outer coils (2, 3) is detected before the heating process. After the detection of the vessel, only the inner coil (2) or both the inner and outer coils (2, 3) are energized according to the amount of the heater (4) covered by the vessel, thus the heating process is started at the power level adjusted according to the heating level set by the user.
  • the microcontroller (6) enables the power control circuit (5) whereto the inner and outer coils (2, 3) are connected to transmit signals at high frequency, and the presence of the vessel on the inner and outer coils (2, 3) is detected according to the feedback of the power control circuits (5) whereto the inner and outer coils (2, 3) are connected.
  • the induction heating cooker (1) of the present invention comprises the microcontroller (6)
  • the vessel detection process is performed successively first on the inner coil (2) and then on the outer coil (3).
  • the power control circuit (5) whereto the inner coil (2) is connected is enabled to transmit a constant detection frequency (F-detection) at a high frequency - for example 60 kHz.
  • the power control circuit (5) whereto the inner coil (2) is connected detects the presence of the vessel before the outer coil (3).
  • the microcontroller (6) updates the detection frequency (F-detection) and determines a common detection frequency (F-detection-common) for the inner and outer coils (2, 3). After the detection process in the inner coil (2), the microcontroller (6) starts the detection process in the outer coil (3) at the determined common detection frequency (F-detection-common) and thus, providing that the vessel detection process is quickly completed.
  • the microcontroller (6) furthermore determines the common heating frequency (F-heating-common) to be applied to the inner and outer coils (2, 3) at any power setting according to the feedback received from the inner coil (2) detecting the vessel first (from the power control circuit (5) whereto the inner coil (2) is connected).
  • F-heating-common common heating frequency
  • the microcontroller (6) determines a common heating frequency (F-heating-common-1, F-heating-common-2, ...) for the inner and outer coils (2, 3) at any power setting such as 1, 2, ... set for heating and a common resonance frequency for the inner and outer coils (2, 3) when the power setting is set to maximum, thus preventing the magnetic fields in the inner and outer coils (2, 3) from affecting each other during both the vessel detection and the heating processes and preventing the generation of audible noise.
  • a common heating frequency F-heating-common-1, F-heating-common-2,
  • the microcontroller (6) enables the inner coil (2) to be energized in order to heat the vessel and simultaneously enables the vessel detection process to be started in the outer coil (3) when the vessel detection process in the inner coil (2) is completed ( Figure 2).
  • the microcontroller (6) energizes the outer coil (3). If the vessel does not cover the outer coil (3), the outer coil (3) is deactivated ( Figure 3).
  • the microcontroller (6) waits for the completion of the detection process in the outer coil (3) in order to start the heating process in the inner coil (2) after the completion of the vessel detection process in the inner coil (2) and enables the inner and outer coils (2, 3) to be simultaneously for the heating process at the end of the waiting time (Figure 4). If the vessel does not cover the outer coil (3) as in the above-disclosed embodiment, the outer coil (3) is not activated ( Figure 5).
  • the microcontroller (6) provides the application of a "preheating" by operating the inner coil (2) at a power lower than the power set (at a frequency higher than the frequency corresponding to the power setting) during the waiting time elapsing until the detection process in the outer coil (3) is completed at the end of the vessel detection process in the inner coil (2) ( Figure 6).
  • the microcontroller (6) enables the inner and outer coils (2, 3) to be energized by the power control circuits (5) applying the common heating frequency (F-heating-common) to start the heating process at the power setting selected at the end of the preheating process in the inner coil (2) and the detection process in the outer coil (3). If the vessel does not cover the outer coil (3) as in the above-disclosed embodiment, the outer coil (3) is not energized ( Figure 7).
  • the microcontroller (6) furthermore enables the power control circuits (5) to transmit signal at the same phase to the inner and outer coils (2, 3) during the vessel detection and heating processes, thus preventing the generation of noise in both processes.
  • the induction heating cooker (1) vessel detection method of the present invention comprises the steps of
  • the vessel detection process is applied first to the inner coil (2) and then to the outer coil (3), and after the vessel is detected on the inner and outer coils (2, 3) the heating process is started ( Figure 2, 3).
  • a "preheating" process is performed by operating the inner coil (2) at a power lower than the power set (at a frequency higher than the frequency corresponding to the power setting) during the waiting time elapsing until the detection process in the outer coil (3) is completed ( Figure 6).
  • the preheating process in the inner coil (2) is terminated and the inner and outer coils (2, 3) are heated at the common heating frequency (F-heating-common) determined during the vessel detection process of the inner coil (2), thus the total heating time is shortened and energy saving is provided.
  • the vessel is not detected on the outer coil (3), only the inner coil (2) is energized so as to continue to the heating process and the outer coil (3) is not operated (Figure 7).
  • the induction heating cooker (1) of the present invention comprising the heater (4) with concentric dual coils (2, 3), the time for detecting the vessel and thus the time for starting the heating at the desired power setting is shortened, hence providing energy saving. Moreover, the generation of noise during the detection and heating processes is prevented.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Induction Heating Cooking Devices (AREA)

Abstract

La présente invention concerne un appareil de cuisson à chauffage par induction (1) comportant un dispositif de chauffage (4) comprenant une bobine interne (2) et une bobine externe (3) disposées de manière concentrique dans une structure double et appliquant de l'énergie magnétique en vue de chauffer un récipient placé sur une zone de chauffage (Z), deux circuits de commande de puissance (5) qui permettent que la bobine interne (2) et la bobine externe (3) soient commandées séparément, et un microcontrôleur (6) qui commande le fonctionnement des circuits de commande de puissance (5).
PCT/EP2017/054988 2016-03-04 2017-03-03 Appareil de cuisson à chauffage par induction doté d'un dispositif de chauffage à double bobine et procédé de détection de récipient WO2017149111A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TRA2016/02871 2016-03-04
TR201602871 2016-03-04

Publications (1)

Publication Number Publication Date
WO2017149111A1 true WO2017149111A1 (fr) 2017-09-08

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PCT/EP2017/054988 WO2017149111A1 (fr) 2016-03-04 2017-03-03 Appareil de cuisson à chauffage par induction doté d'un dispositif de chauffage à double bobine et procédé de détection de récipient

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111316757A (zh) * 2017-11-08 2020-06-19 三菱电机株式会社 感应加热烹调器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0716560A1 (fr) * 1994-12-09 1996-06-12 Cidelcem Industries Dispositif de chauffage par induction de récipient et procédé de commande d'un tel dispositif
EP1868417A1 (fr) 2006-06-14 2007-12-19 Brandt Industries Systeme a induction, procede d'alimentation d'un inducteur et table de cuisson comportant un tel systeme
EP1943878A1 (fr) 2005-10-27 2008-07-16 BSH Bosch und Siemens Hausgeräte GmbH Plaque de cuisson et procede permettant de faire fonctionner une plaque de cuisson
EP2342943A1 (fr) 2008-09-30 2011-07-13 BSH Bosch und Siemens Hausgeräte GmbH Plaque de cuisson et procédé permettant de faire fonctionner une plaque de cuisson
WO2015043650A1 (fr) 2013-09-27 2015-04-02 Arcelik Anonim Sirketi Circuit de synchronisation pour l'alimentation d'une zone de chauffage à double bobine d'induction de plaque de cuisson

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0716560A1 (fr) * 1994-12-09 1996-06-12 Cidelcem Industries Dispositif de chauffage par induction de récipient et procédé de commande d'un tel dispositif
EP1943878A1 (fr) 2005-10-27 2008-07-16 BSH Bosch und Siemens Hausgeräte GmbH Plaque de cuisson et procede permettant de faire fonctionner une plaque de cuisson
EP1868417A1 (fr) 2006-06-14 2007-12-19 Brandt Industries Systeme a induction, procede d'alimentation d'un inducteur et table de cuisson comportant un tel systeme
EP2342943A1 (fr) 2008-09-30 2011-07-13 BSH Bosch und Siemens Hausgeräte GmbH Plaque de cuisson et procédé permettant de faire fonctionner une plaque de cuisson
WO2015043650A1 (fr) 2013-09-27 2015-04-02 Arcelik Anonim Sirketi Circuit de synchronisation pour l'alimentation d'une zone de chauffage à double bobine d'induction de plaque de cuisson

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111316757A (zh) * 2017-11-08 2020-06-19 三菱电机株式会社 感应加热烹调器
EP3709769A4 (fr) * 2017-11-08 2020-12-02 Mitsubishi Electric Corporation Appareil de cuisson à induction
CN111316757B (zh) * 2017-11-08 2022-02-18 三菱电机株式会社 感应加热烹调器

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