EP3170362B1 - System und verfahren zur änderung einer kochgeschirrposition in einem induktionsherd - Google Patents

System und verfahren zur änderung einer kochgeschirrposition in einem induktionsherd Download PDF

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Publication number
EP3170362B1
EP3170362B1 EP14816437.9A EP14816437A EP3170362B1 EP 3170362 B1 EP3170362 B1 EP 3170362B1 EP 14816437 A EP14816437 A EP 14816437A EP 3170362 B1 EP3170362 B1 EP 3170362B1
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EP
European Patent Office
Prior art keywords
induction
heating cooker
pan
cooking
induction heating
Prior art date
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EP14816437.9A
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English (en)
French (fr)
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EP3170362A1 (de
Inventor
Namik Yilmaz
Selçuk SOYYIGIT
Tolga INAM
Metin ÖZTÜRK
Metin ASTOPRAK
Mehmet BARIS
Özgür Mutlu OZ
Bekir DUMLU
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Arcelik AS
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Arcelik AS
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Priority to PL14816437T priority Critical patent/PL3170362T3/pl
Publication of EP3170362A1 publication Critical patent/EP3170362A1/de
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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
    • 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
    • H05B2213/03—Heating plates made out of a matrix of heating elements that can define heating areas adapted to cookware randomly placed on the heating plate
    • 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

Definitions

  • the present invention relates to a method for operating an induction heating cooker by which cookware positioning can be modified according to available input by a position detection circuit.
  • an induction heating cooker operates based on the process of heating a ferromagnetic material by electromagnetic induction where eddy currents are to be induced and resistance provides heat dissipation within the ferromagnetic material, i.e. a cooking vessel in the form of a pot or pan.
  • induction heating By induction heating, high-frequency alternating current is passed through a coil upon which a magnetic field of the same frequency is induced.
  • the internal resistance of the pan causes heat dissipation due to Joule effect and energy transfer is interrupted once the pan is removed from the cooktop.
  • the energy efficiency of induction heating cookers is considerably high since there is no transfer of heat energy between the hob and the cookware and heat energy lost in the air is minimal.
  • a resonant converter in an induction heater circuit topology typically consists of a capacitor, an inductor and resistance. To this end, when power is supplied to the resonant tank, electric energy is stored in the inductor and transferred to the capacitor. Resonance therefore occurs while the inductor and the capacitor involve in energy exchange.
  • the resonant converter can be a half-bridge series resonant converter or a quasi-resonant converter.
  • a quasi-resonant converter exhibits certain advantages over a half-bridge series resonant converter especially due to its simpler circuit design having only one power switching device compared to the half-bridge series resonant converter whose overall operation is more complex.
  • the circuit design parameters in a quasi-resonant converter are regarded as a serious cost advantage in this regard.
  • a high-frequency power switch such as an IGBT is accordingly used.
  • EP 1 629 698 B1 discloses an induction cooking system including a power inverter, a microprocessor, a protection circuit and a pan detection circuit.
  • the present invention is devised under the recognition that a significantly simple and immediately practical method of operating an induction heating cooker remains a great need because induction heating cookers are reported to be generally used by younger people having a certain inclination towards non-traditional technologies such as induction cooking. To this end, older or technology-averse people should also be able to immediately implement the method of operation according to the invention.
  • the present invention provides a plurality of distinct induction coils driven by respective resonant inverters such that a plurality of flexible cooking zones can be created with a minimal number of induction coils whereby a cooking container of any size can be heated by induction heating.
  • the present invention provides a simple yet effective method by which a number of sufficiently small cooking zones are created to provide a flexible-distribution cooking surface to correspond to a cooking container of any size.
  • the present invention provides a method for operating an induction heating cooker by which a cooking container of any size is heatable by induction heating as provided by the characterizing features defined in Claim 1.
  • Primary object of the present invention is to provide a method for operating an induction heating cooker by which a cooking container of any size is heatable by a limited number of induction coils sufficiently small to obtain flexible cooking zones.
  • the present invention proposes a method for operating an induction heating cooker by which if up to three adjacent induction coils are selected to be powered, no user interaction is required and a cooking pan is automatically heated. And if a cooking pan is found to be located on more than three adjacent induction coils, the user is requested to limit the number of coils to be powered. The user can select a suggested cooking zone pattern on a graphic display and accordingly move the pan.
  • the limited number of adjacent induction coils can only be in multiples of two.
  • a plurality of flexible cooking zones can be created with a minimal number of induction coils whereby a cooking container of any standard size can be heated.
  • the diameter of a circular-form induction coil according to the invention is preferably between 100 and 140 mm. In the case of other forms of induction coils, such as square, rectangular, triangular etc., the largest distance between two different opposite portions can be determined in the same range.
  • the present invention proposes an induction heating cooker (1) having a plurality of induction coils (2) in the form of multi-zone induction coils (3).
  • a power circuit in relation with each induction coil (2) provides that heat energy is induced within a magnetically responsive cooking container or pan (6) placed above the induction coils (2) of the induction heating cooker (1).
  • the induction heating cooker (1) may comprise a plurality of induction resonant inverters (4) supplied with a source of AC voltage.
  • a full-wave bridge rectifier may be connected between the AC source and power stage of the resonant inductor.
  • the resonant inductor is conventionally connected between the output of said rectifier and the power switch.
  • the resonant capacitor is parallel to the resonant inductor and an anti-parallel diode, i.e. a freewheeling diode is connected parallel to the power switch.
  • the induction resonant inverters (4) of the induction heating cooker (1) may conventionally comprise AC signal filtering circuits. Power passing through a leveling capacitor serves to the purpose of filtering high frequency current. The voltage of the leveling capacitor is converted into a square wave by the high-frequency power switch. According to Ampere's Law, the square wave provides resonance creating a magnetic field around the resonant inductor, that is, the respective induction coil (2). The resonant capacitor provided in parallel with the resonant inductor therefore compensates the inductive nature of the latter.
  • the quasi-resonant converter's power switch may be an insulated gate bipolar transistor (IGBT) driven by a power switch driving circuit (5).
  • IGBT insulated gate bipolar transistor
  • the operating principle of the quasi-resonant converter typically relies on the storage of energy in the resonant inductor when the power switch is turned on, and transfer of energy from the resonant inductor to a cooking pan (6) when the power switching device is turned off.
  • a pan detection circuit (8) sensing cookware positioning is used.
  • Such a pan detection circuit (8) can monitor the resonant current or the IGBT voltage.
  • An electronic circuit that generates an output at the moment which the freewheeling diode starts conduction can be used.
  • a charge detection circuit therefore detects the zero-cross of the current of the freewheeling diode.
  • a user interface (14) with control buttons (13) and a graphic display (12) being controlled by a display driver circuit (9) are provided to enable the user to operate the induction heating cooker (1) functioning according to the method as described hereinafter.
  • the vitro-ceramic glass (7) contains no surface indication as to suggested placement of a cookware or utensil and a user can place a pan (6) anywhere on the vitro-ceramic glass (7) surface he/she wishes.
  • the pan detection circuit (8) detects presence of at least one cooking pan (6) on the vitro-ceramic glass (7) and the user interface (14) generates a graphic representation of the detected cookware placement as currently placed on the graphic display (12). According to the method of operating the induction heating cooker (1), presence of at least three adjacent induction coils (2) are to be verified first.
  • induction heating cookers (1) are reported to be generally used by younger people having a certain inclination towards non-traditional technologies such as induction cooking, the invention ensures that older or technology-averse people can also immediately implement the method of operation according to the invention.
  • cooking utensils are manufactured in certain standard sizes such as having base diameters of 105, 145, 180, 210 or 288 mm.
  • three adjacent induction coils (2) occupy a surface area as large as to cover the base of a larger pan (6) and a single induction coil (2) itself can supply alone sufficient power to a smaller size pan (6), while at the same time providing a sufficiently small cooking zone (11) to provide a distributed-configuration cooking surface.
  • Such a flexible cooking surface allows simultaneous powering of a certain number of induction coils (2) to provide versatile cooking zones (11) corresponding to cooking pans (6) of different sizes, including those with non-standard, i.e. non-circular shapes.
  • a flexible surface configuration can be maintained with a limited number of induction coils (2), those being sufficiently small in size to provide flexible cooking zones (11) and sufficiently large to keep the total number of induction coils (2) limited, while at the same time creating optimum size cooking zones (11) for powering cooking pans (11) of different sizes, including non-standard ones.
  • an induction heating cooker (1) being versatile and flexible, yet having a reduced number of induction coils (2) creating, when combined, cooking zones (11) corresponding to the existing standard sizes of the cooking equipment is proposed in the manner that while a single cooking zone (11) can feed power to a smaller size container, a larger size container is heatable by at most three adjacent induction coils (2).
  • the induction coils (2) can be adjacent in any direction, i.e. horizontally and/or vertically.
  • the user is asked to displace the container to a predetermined neighboring location containing a number of induction coils (2) in the form of multiples of two. In this manner, if four induction coils (2) are detected, only two or all four of those will be operable upon selection of the user by moving the pan (6), as suggested to him/her on the graphic display (12).
  • the suggested predetermined neighboring cooking zones (11) can have a number of induction coils (2) in the form of multiples of two, because it is observed that in the case of more than three induction coils (2), mostly two or rarely four and even more rarely six adjacent induction coils (2) should define a suitable cooking zone (11) corresponding to any size of standard shape pans (6) also including non-standard,, i.e. non-circular pans (6).
  • the present invention provides that while a smaller pan (6) can be heated by a single induction coil (2), a plurality of induction coils (2) up to three can heat any larger pan (6). And if a pan (6) is detected on more than three adjacent coils (2), a number of induction coils (2) in the multiples of two will be sufficient for covering any pan (6) rather than a cooking zone (11) having an odd number of induction coils (2), because a cooking zone (11) formed by the combination of five or seven inductions coils (2) does not fit to any standard-size circular pan (6) or is out of shape to match a non-standard (non-circular) pan (6).
  • the largest distance between two portions of an induction coil (2) is between 100 and 140 mm, and preferably between 110 and 130 mm and more preferably 120 mm.
  • the present invention proposes a method for operating an induction heating cooker (1) comprising a plurality of induction coils (2) in association with induction resonant inverters (4) to provide multi-zone induction coils (3), a power switch driving circuit (5) driving power switches associated with said induction resonant inverters (4), a pan detection circuit (8) for detecting presence of a pan (6) and a user interface (14) having a graphic display (12), said induction heating cooker (1) further comprising a vitro-ceramic glass (7) surface containing no surface indication as to suggestible placement of a pan (6).
  • the induction heating cooker (1) of the invention comprises a control circuitry (10), effecting, a) detection of presence of at least one cooking pan (6) on the vitro-ceramic glass (7) by means of said pan detection circuit (8), b) generation of a graphic representation of the detected at least one cooking pan (6) on the graphic display (12) of the user interface (14) as being currently placed, c) verification in that said at least one cooking pan (6) is detected on at least three adjacent induction coils (2), d) merging of said at least three adjacent induction coils (2) to obtain a single cooking zone (11) of at least three adjacent induction coils (2), e) requesting of user intervention if a cooking pan (6) on more than three adjacent induction coils (2) is detected and, f) generation of a graphic representation of predetermined neighboring cooking zones (11) the cooking pan (6) is to be displaced, said predetermined neighboring cooking zones (11) containing a number of induction coils (2) in the form of multiples of two.
  • the largest distance between two different portions of an induction coil (2) is preferably between 100 and 140 mm.
  • each induction coil (2) is comprised of a plurality of separately powerable sub-coils.
  • the induction heating cooker (1) comprises at least nine induction coils (2) in the form of a 3x3 induction coil (2) square matrix.
  • the method of the invention can therefore advantageously be implemented by just nine induction coils (2), while still providing a flexible-configuration cooking surface in the form of multi-zone induction coils (3).
  • each induction coil (2) is structured to have a rectangular, triangular or circular form.
  • the largest distance between two different portions of an induction coil (2) is preferably between 110 and 130 mm and more preferably 120 mm.

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

Claims (7)

  1. Herd mit Induktionsheizung (1) mit mehreren Induktionsspulen (2) in Verbindung mit Induktionsresonanzinvertern (4) zur Bereitstellung von Mehrzonen- Induktionsspulen (3), eine Leistungsschalter-Treiberschaltung (5), die den Induktionsresonanzinvertern (4) zugeordnete Leistungsschalter ansteuert, eine Topferkennungsschaltung (8) zur Erkennung der Anwesenheit mindestens Kochtopfes (6) und eine Benutzerschnittstelle (14) mit einem Grafikdisplay (12), wobei der Herd mit Induktionsheizung (1) ferner eine Vitro- Glaskeramik (7) Oberfläche aufweist, die keine oberflächliche Anzeige für die mögliche Platzierung eines Kochtopfes (6) enthält, dadurch gekennzeichnet, dass eine Steuerschaltung (10) zum Bewirken von folgendes konfiguriert ist:
    - Erkennung der Anwesenheit mindestens eines Kochtopfes (6) auf der Vitro-Glaskeramik (7) mittels der Topferkennungsschaltung (8),
    - Erzeugung einer grafischen Darstellung der erkannten mindestens einen Kochtopf (6) auf dem Grafikdisplay (12) der Benutzerschnittstelle (14) als aktuell platziert,
    - Verifizierung dadurch, dass mindestens ein Kochtopf (6) an mindestens drei benachbarten Induktionsspulen (2) erkennt wird,
    - Zusammenführung von mindesten drei benachbarten Induktionsspulen (2) um eine einzige Kochzone (11) der mindesten drei benachbarten Induktionsspulen (2) zu erhalten,
    - Anforderung von Benutzereingriff, falls ein Kochtopf (6) an mehr als drei benachbarten Induktionsspulen (2) erkannt wird, und
    - Erzeugung einer grafischen Darstellung der vorbestimmten benachbarten Kochzonen (11), wobei der Kochtopf (6) platziert werden soll, wobei die vorbestimmten benachbarten Kochzonen (11) eine Anzahl von Induktionsspulen (2) in Form von Vielfachen von zwei enthalten.
  2. Herd mit Induktionsheizung (1) nach Anspruch 1, dadurch gekennzeichnet, dass der größte Abstand zwischen zwei verschiedenen Abschnitten einer Induktionsspule (2) zwischen 100 und 140 mm beträgt.
  3. Herd mit Induktionsheizung (1) nach Anspruch 2, dadurch gekennzeichnet, dass jede Induktionsspule (2) eine Vielzahl von separat betreibbaren Teilspulen umfasst.
  4. Herd mit Induktionsheizung (1) nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass der Induktionsheizkocher (1) mindestens neun Induktionsspulen (2) in Form einer 3x3 Induktionsspulen (2) -Matrix umfasst.
  5. Herd mit Induktionsheizung (1) nach Anspruch 2, 3 oder 4, dadurch gekennzeichnet, dass der Induktionsspule (2) so strukturiert ist, dass sie eine rechteckige, dreieckige oder kreisförmige Form aufweist.
  6. Herd mit Induktionsheizung (1) nach Anspruch 2, dadurch gekennzeichnet, dass der größte Abstand zwischen zwei verschiedenen Abschnitten einer Induktionsspule (2) zwischen 110 und 130 mm beträgt.
  7. Herd mit Induktionsheizung (1) nach Anspruch 6, dadurchgekennzeichnet, dass der größte Abstand zwischen zwei verschiedenen Abschnitten einer Induktionsspule (2) 120 mm beträgt.
EP14816437.9A 2014-07-15 2014-07-15 System und verfahren zur änderung einer kochgeschirrposition in einem induktionsherd Active EP3170362B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL14816437T PL3170362T3 (pl) 2014-07-15 2014-07-15 Układ i sposób umożliwiający modyfikację rozmieszczenia naczyń kuchennych na kuchence indukcyjnej

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/TR2014/000282 WO2016010491A1 (en) 2014-07-15 2014-07-15 System and method enabling modification of cookware positioning in an induction heating cooker

Publications (2)

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EP3170362A1 EP3170362A1 (de) 2017-05-24
EP3170362B1 true EP3170362B1 (de) 2018-04-11

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EP (1) EP3170362B1 (de)
ES (1) ES2675239T3 (de)
PL (1) PL3170362T3 (de)
WO (1) WO2016010491A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021142108A1 (en) 2020-01-07 2021-07-15 Ghsp, Inc. Inductive cooktop system with display interface

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102373839B1 (ko) 2017-11-23 2022-03-14 삼성전자주식회사 조리 장치 및 그 제어방법

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1629698B1 (de) 2003-05-28 2006-12-27 Tubitak-Bilten ( Turkiye Bilimsel Ve Teknik Arastirma Kurumu-Bilgi Teknolojileri Ve Elektronik Arastirma Enstitusu) Induktionskochfeld
JP4863961B2 (ja) * 2007-10-15 2012-01-25 三菱電機株式会社 誘導加熱調理器
DE102009001934B4 (de) * 2009-03-27 2011-11-10 BSH Bosch und Siemens Hausgeräte GmbH Gargerät mit mindestens einem Kochfeld
FR2970837B1 (fr) * 2011-01-26 2014-09-05 Fagorbrandt Sas Procede d'optimisation de positionnement d'au moins un recipient dispose au-dessus d'un ensemble d'inducteurs d'une table de cuisson a induction et table de cuisson a induction associee
EP2597929B1 (de) * 2011-11-28 2016-10-26 BSH Hausgeräte GmbH Gargerätvorrichtung
EP2688364B1 (de) * 2012-07-20 2016-06-22 BSH Hausgeräte GmbH Kochfeldvorrichtung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021142108A1 (en) 2020-01-07 2021-07-15 Ghsp, Inc. Inductive cooktop system with display interface
EP4088549A4 (de) * 2020-01-07 2023-08-30 Ghsp, Inc. Induktives kochfeld-system mit anzeigeoberfläche

Also Published As

Publication number Publication date
ES2675239T3 (es) 2018-07-09
PL3170362T3 (pl) 2018-10-31
EP3170362A1 (de) 2017-05-24
WO2016010491A1 (en) 2016-01-21

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