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WO2017174630A1 - Table de cuisson à chauffage par induction comprenant une zone de chauffage à double bobine - Google Patents

Table de cuisson à chauffage par induction comprenant une zone de chauffage à double bobine Download PDF

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Publication number
WO2017174630A1
WO2017174630A1 PCT/EP2017/058064 EP2017058064W WO2017174630A1 WO 2017174630 A1 WO2017174630 A1 WO 2017174630A1 EP 2017058064 W EP2017058064 W EP 2017058064W WO 2017174630 A1 WO2017174630 A1 WO 2017174630A1
Authority
WO
WIPO (PCT)
Prior art keywords
outer coil
vessel
coil
induction heating
power control
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.)
Ceased
Application number
PCT/EP2017/058064
Other languages
English (en)
Inventor
Metin OZTURK
Atakan SARIOGLU
Ulas OKTAY
Sercan SINIRLIOGLU
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.)
Arcelik AS
Original Assignee
Arcelik AS
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 AS filed Critical Arcelik AS
Publication of WO2017174630A1 publication Critical patent/WO2017174630A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H05B6/10—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
    • 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
    • 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 cooktop comprising a heating zone that has two concentric coils.
  • induction heating cooktops various induction coil structures have been developed for heating vessels with different sizes.
  • the use of heaters that have concentric dual induction coils for heating both larger diameter vessels and smaller diameter vessels on the same heating zone with homogeneous heat distribution is known.
  • the heating process is performed by energizing the induction coils.
  • the diameter of the vessel that is placed onto the heating zone is small, the vessel only covers the inner coil and thus, only the inner coil is energized.
  • the diameter of the vessel that is placed onto the heating zone is large, the vessel covers both induction coils and thus, both induction coils are energized.
  • the International Patent Application No. WO2015043650 discloses a dual coil induction heating cooktop.
  • the European Patent Applications EP1868417 and EP2342943 disclose a dual coil induction heating cooktop.
  • the induction coils are energized by at least one power control unit.
  • the European Patent No. EP1943878 discloses an induction heating cooktop comprising a first heating zone having at least two induction coils energized separately by means of a power supply and an additional heating zone energized by a second power supply.
  • the aim of the present invention is the realization of an induction heating cooktop comprising a heating zone with two concentric coils, wherein the detection of the vessels is simplified.
  • a detection signal is not transmitted to the outer coil for the detection of the presence of the vessel over the outer coil and only the inner coil is energized.
  • the magnetic field generated by the inner coil induces a current on the outer coil.
  • the current induced on the outer coil varies depending on whether the vessel is present on the outer coil.
  • the said induced current is measured by means of a current measurement circuit and compared with a limit value by a microcontroller and it is determined whether the vessel covers the outer coil.
  • the time spent for the detection of the vessel placed onto the heating zone and hence starting the heating at the desired power level is decreased, and thus, energy is saved. It is not required to transmit detecting signals to the outer coil to detect the presence of the vessel, thus software and hardware costs are reduced and the noises are minimized.
  • Figure 1 - is a schematic view of an induction heating cooktop in an embodiment of the present invention
  • Figure 2 - is a schematic view of an induction heating cooktop in another embodiment of the present invention.
  • the induction heating cooktop (1) comprises an inner coil (2) and an outer coil (3) that are magnetically coupled, forming a concentric dual structure and generating magnetic energy for heating a vessel (12) placed on a heating zone (Z), a first power control circuit (4) that enables the inner coil (2) to be driven, a second power control circuit (5) that enables the outer coil (3) to be driven and a microcontroller (6) that controls the operation of the first and the second power control circuits (4, 5).
  • the induction heating cooktop (1) when the vessel (12) is placed onto the heating zone (Z), whether the vessel (12) covers only the inner coil (2) or both the inner and the outer coils (2, 3) is detected before the heating process. After the detection of the vessel (12), according to whether the vessel (12) covers the inner and the outer coils (2, 3), in other words according to the size of the vessel (12), only the inner coil (2) or both the inner and outer coils (2, 3) are energized and the heating process is started at the power level set by the user.
  • the induction heating cooktop (1) of the present invention comprises the microcontroller (6) that, without transmitting a detection signal to the outer coil (3) to detect the presence of the vessel (12) on the outer coil (3), enables only the inner coil (2) to be energized by the first power control circuit (4) and that starts the heating process if the vessel (12) is present on the inner coil (2), and that detects whether the vessel (12) covers the outer coil (3) based on the magnitude of the current induced on the outer coil (3) as a result of the magnetic field generated by the inner coil (2).
  • the inner and the outer coils (2, 3) concentrically disposed on the heating zone (Z) are magnetically coupled.
  • the amount of the said magnetic coupling is directly correlated with the ratio of the area the vessel (12) covers over the inner and the outer coils (2, 3).
  • the microcontroller (6) determines whether only the inner coil (2) or both the inner and the outer coils (2, 3) should be operated.
  • the first power control unit (4) transmits the vessel (12) detection signal to the inner coil (2), and if the presence of the vessel (12) is detected, the inner coil (2) is operated at the desired power level.
  • a current is induced on the magnetically coupled outer coil (3) at a value proportional to the diameter of the vessel (12).
  • the value (magnitude) of the current induced on the outer coil (3) decreases or increases depending on the diameter of the vessel (12). If the diameter of the vessel (12) is large enough to at least partially cover the outer coil (3), the magnitude of the current induced on the outer coil (3) decreases due to the resistance of the vessel (12).
  • the current induced on the outer coil (3) increases since there is not any vessel (12) resistance acting on the outer coil (3).
  • the limit value of the current induced on the outer coil (3) is determined by the producer based on a vessel (12) with a diameter that is equal to the inner diameter of the outer coil (3) and the said limit induced current value is stored in the memory of the microcontroller (6).
  • the induction heating cooktop (1) further comprises a current measurement circuit (7) that is connected to the outer coil (3) and that measures the current induced on the outer coil (3) when the inner coil (2) is energized by the microcontroller (6) by means of the first power control circuit (4).
  • the microcontroller (6) compares the data received from the current measurement circuit (7) with the limit induced current value that is determined according to a vessel (12) with a diameter that is equal to the inner diameter of the outer coil (3), and determines whether the vessel (12) is present on the outer coil (3).
  • the microcontroller (6) determines that the vessel (12) at least partially covers the outer coil (3) and energizes the outer coil (3) with the power level set by the user.
  • the microcontroller (6) determines that there is no vessel (12) on the outer coil (3) and does not energize the outer coil (3).
  • both of the first and second power control circuits (4, 5) are half bridge series resonant circuits (HBSR) that comprise a bridge rectifier (8), a drive circuit (9), two resonant capacitors (10) and two power switches (11) such as insulated gate bipolar transistors (IGBT) ( Figure 1).
  • HBSR half bridge series resonant circuits
  • IGBT insulated gate bipolar transistors
  • both of the first and second power control circuits (4, 5) are single switch quasi resonant circuits (SSQR) that comprise a bridge rectifier (8), a drive circuit (9), a single resonant capacitor (10) and a single power switch (11) such as insulated gate bipolar transistors (IGBT) ( Figure 2).
  • SSQR single switch quasi resonant circuits
  • IGBT insulated gate bipolar transistors
  • the presence of the vessel (12) on the outer coil (3) is detected by energizing only the inner coil (2). Whether the vessel (12) at least partially covers the outer coil (3) or not is determined by measuring the current induced on the outer coil (3).
  • the need for transmitting a signal by the second power control circuit (5) in order to detect the presence of the vessel (12) on the outer coil (3) and measuring the inductance, resistance and resonant frequency, etc. of the outer coil (3) is obviated, thus the vessel (12) detection process is simplified and the heating process is started quicker. Moreover, the software and hardware costs are decreased. Furthermore, the noise that is generated during the detection of the vessel (12) on the inner and the outer coils (2, 3) and that disturbs the user is reduced.

Landscapes

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

Abstract

La présente invention concerne une table de cuisson à chauffage par induction (1) comprenant une bobine intérieure (2) et une bobine extérieure (3) qui sont magnétiquement couplées, formant une structure double concentrique et générant de l'énergie magnétique pour chauffer un récipient (12) placé sur une zone de chauffage (Z), un premier circuit de commande de puissance (4) qui permet d'entraîner la bobine intérieure (2), un second circuit de commande de puissance (5) qui permet d'entraîner la bobine extérieure (3) et un microcontrôleur (6) qui commande le fonctionnement des premier et second circuits de commande de puissance (4, 5).
PCT/EP2017/058064 2016-04-06 2017-04-05 Table de cuisson à chauffage par induction comprenant une zone de chauffage à double bobine Ceased WO2017174630A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TRA2016/04464 2016-04-06
TR201604464 2016-04-06

Publications (1)

Publication Number Publication Date
WO2017174630A1 true WO2017174630A1 (fr) 2017-10-12

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ID=58632352

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/058064 Ceased WO2017174630A1 (fr) 2016-04-06 2017-04-05 Table de cuisson à chauffage par induction comprenant une zone de chauffage à double bobine

Country Status (1)

Country Link
WO (1) WO2017174630A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019092528A1 (fr) * 2017-11-08 2019-05-16 BSH Hausgeräte GmbH Système de table de cuisson

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6242721B1 (en) * 1997-01-11 2001-06-05 Schott Glas Cooktop with a non-metallic hotplate
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
EP2779787A1 (fr) * 2013-03-11 2014-09-17 Electrolux Appliances Aktiebolag Procédé de détection d'un ustensile de cuisson sur une plaque à induction, plaque à induction et appareil 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 (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6242721B1 (en) * 1997-01-11 2001-06-05 Schott Glas Cooktop with a non-metallic hotplate
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
EP2779787A1 (fr) * 2013-03-11 2014-09-17 Electrolux Appliances Aktiebolag Procédé de détection d'un ustensile de cuisson sur une plaque à induction, plaque à induction et appareil 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 (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019092528A1 (fr) * 2017-11-08 2019-05-16 BSH Hausgeräte GmbH Système de table de cuisson

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