EP2774454B1 - Cuisinière à chauffage par induction - Google Patents

Cuisinière à chauffage par induction Download PDF

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Publication number
EP2774454B1
EP2774454B1 EP12784223.5A EP12784223A EP2774454B1 EP 2774454 B1 EP2774454 B1 EP 2774454B1 EP 12784223 A EP12784223 A EP 12784223A EP 2774454 B1 EP2774454 B1 EP 2774454B1
Authority
EP
European Patent Office
Prior art keywords
plate
heat sink
sensor
switching elements
induction heating
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.)
Active
Application number
EP12784223.5A
Other languages
German (de)
English (en)
Other versions
EP2774454A1 (fr
Inventor
Cemalettin Kalayci
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
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Publication date
Application filed by Arcelik AS filed Critical Arcelik AS
Publication of EP2774454A1 publication Critical patent/EP2774454A1/fr
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Publication of EP2774454B1 publication Critical patent/EP2774454B1/fr
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Classifications

    • 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
    • H05B6/1263—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special coil arrangements using coil cooling arrangements
    • 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
    • H05B2213/04—Heating plates with overheat protection means

Definitions

  • the present invention relates to an induction heating cooker that is provided to operate in a safe manner.
  • the induction heating cooker functions according to the principle of heating a cast iron or steel ferromagnetic cooking container with the magnetic field effect generated by the induction coil.
  • the energy efficiency of induction heating cookers is considerably high since the heat required for cooking is not generated in the gas or electric burners on the cooker but directly in the cooking container.
  • electronic switching elements such as the IGBT (Insulated Gate Bipolar Transistor) or the diode bridge on the circuit board and therefore the said switching elements are excessively heated.
  • An effective cooling system is required so that the switching elements can operate safely.
  • the switching elements carrying high current and where the most overheating is observed are cooled by being connected to a heat sink and by delivering air thereto by means of a fan.
  • the temperature of the switching elements In order to assure that the induction heating cooker operates in safe conditions, the temperature of the switching elements must be kept under control. When the switching elements reach the critical temperature defined by the producer, the current passed therethrough is cut off by the control unit.
  • the temperature of the switching element (4') is tried to be kept under control by connecting a sensor (2') onto the heat sink (3').
  • a sensor (2') onto the heat sink (3').
  • the temperature measured by the sensor (2') is lower than the actual temperature of the switching element (4'). Since the turning off of cooker is decided depending on the temperature values measured by the sensor (2'), it is crucial to perform a temperature control that does not compromise from cooking efficiency and also provides safe operating conditions.
  • a cooking device comprising a guide that is disposed on the heat sink so as to cover at least some portion of the heat sink and that provides some of the cold air to be guided onto the switching elements.
  • the document JP 2011 198621 discloses an induction heating cooker according to the preamble of claim 1.
  • the aim of the present invention is the realization of an induction heating cooker that is provided to operate in a safe manner by providing the temperature of the switching elements to be measured as close as possible to the actual values.
  • the present invention is defined by the claims and comprises at least one heat sink whereon the switching elements are placed, providing the cooling of the switching elements, a plate produced from a heat-conducting material, placed on the heat sink so that the switching elements are therebetween, a sensor disposed on the plate and used for measuring temperature and a control unit that provides the power to be transmitted to the switching elements depending on the temperature data transmitted by the sensor.
  • the switching elements heat due to the current passing therethrough.
  • the heat sink provides the cooling of the switching elements by spreading the cold air blown by the fan.
  • the plate is placed onto the switching elements so that there is heat transfer therebetween by means of conduction. Thus, when the switching elements heat, the plate heats as well.
  • the temperature of the plate is almost equal to the average temperature of the switching elements.
  • the induction heating cooker is provided to operate in safer operating conditions with respect to the user.
  • the switching elements are fastened onto the heat sink and the plate is mounted onto the switching elements so as to contact the switching elements.
  • the plate is placed between the sensor and the heat sink so as to prevent the contact of these two.
  • the sensor is prevented from directly contacting the heat sink. Consequently, the sensor is enabled to measure the temperature of the plate heating up due to the heat conducted to the plate from the switching elements.
  • the plate is placed so as to longitudinally extend over the heat sink.
  • the heat passing to the plate from the switching elements placed side by side onto the heat sink is provided to be homogeneously distributed on the plate.
  • the senor is placed at the center of the plate so that the switching elements remain at both sides of the sensor.
  • the heat passing from the switching elements to the plate is provided to be better homogenized.
  • the sensor is provided to measure the heat effectively distributed on the plate.
  • more than one fixing hole is arranged on the plate.
  • the switching elements After being positioned between the heat sink and the plate, the switching elements are fastened to the heat sink by means of fixing elements.
  • the fixing element is respectively passed through the fixing hole and the switching element to be fixed onto the heat sink.
  • the sensor is also positioned on the plate and fastened onto the plate by means of a fixing element. The other end of the fixing element extends towards the heat sink.
  • the plate is produced from rectangular sheet metal. With a much shorter width with respect to its length, the plate is in a flat rod shape.
  • the plate is produced from aluminum.
  • the heat conduction feature of the plate is improved.
  • an induction heating cooker is realized, wherein the temperature of the switching elements are measured by means of the sensor on the plate placed onto the switching elements.
  • the induction heating cooker (1) comprises an upper table (3) produced from materials such as glass or ceramic, more than one induction coil (2) disposed under the upper table (3), providing the cooking container of ferromagnetic feature placed thereon to be heated by the magnetic field it generates, more than one circuit board (4) providing the induction coils (2) to be energized, more than one switching element (5) connected to the circuit board (4), carrying high value electric current and heating due to effect of the current it carries, a fan (6) disposed under the upper table (3) and at least one heat sink (7) that provides the cooling of the switching elements (5) placed thereon by distributing the air blown by the fan (6).
  • the switching elements (5) are elements carrying high-value electric current, overheating due to the current, such as IGBT (Insulated Gate Bipolar Transistor) and diode bridge. Being placed onto the heat sink (7) distributing the cold air blown by the fan (6), the switching elements (5) are prevented from overheating thanks to the heat transfer between the switching elements (5) and the heat sink (7).
  • IGBT Insulated Gate Bipolar Transistor
  • the induction heating cooker (1) of the present invention furthermore comprises a plate (8) produced from a heat-conducting material, placed on the heat sink (7) so as to contact the switching elements (5), at least one sensor (9) disposed on the plate (8) and used for measuring the temperature of the plate (8) and a control unit (12) that controls the energizing of the switching elements (5) depending on the temperature data transmitted by the sensor (9). Since the switching elements (5) contact both the heat sink (7) and the plate (8), heat transfer occurs between the switching element (5), the heat sink (7) and the plate (8) by means of conduction. Since the plate (8) contacts every one of the switching elements (5), the temperature of the plate (8) is almost equal to the average temperature of the switching elements (5).
  • the plate (8) undertakes the role of homogenizing the temperatures of the switching elements (5).
  • the sensor (9) By means of the sensor (9) being placed onto the plate (8), the sensor (9) is provided to measure the average temperature of the plate (8), hence of the switching elements (5).
  • the control unit (12) controls the current transmitted to the switching elements (5) depending on the temperature values transmitted by the sensor (9). When the temperature value measured by the sensor (9) reaches the critical value determined by the producer, the control unit (12) cuts off the current passing through the switching elements (5).
  • the switching elements (5) are prevented from overheating, providing safe operating conditions with respect to the user.
  • the switching element (5) is fastened onto the heat sink (7) so as to be between the heat sink (7) and the plate (8).
  • the switching elements (5) contact both the heat sink (7) and the plate (8). Accordingly, when current passes through one of the switching elements (5), heat transfer occurs between that switching element (5) and the plate (8).
  • the sensor (9) on the plate (8) the temperature of the plate (8), hence of the switching element (5) is measured.
  • the plate (8) is placed between the sensor (9) and the heat sink (7).
  • the sensor (9) is prevented from directly contacting the heat sink (7).
  • heat transfer between the sensor (9) and the heat sink (7) is prevented, and the sensor (9) is prevented from getting cold by being affected by the cold air spreading from the heat sink (7). Consequently, the sensor (9) is provided to measure the temperature of the plate (8) heating due to the heat passing from the switching elements (5) to the plate (8).
  • the plate (8) is longitudinally placed over the heat sink (7). Since the switching elements (5) are placed in a side-by-side manner onto the heat sink (7), the plate (8) is longitudinally placed onto the heat sink (7) so as to contact every one of the switching elements (5).
  • the senor (9) is placed almost at the center of the plate (8).
  • the sensor (9) is placed onto the plate (8) so that the switching elements (5) are at both sides of the sensor (9).
  • the heat emanated from the switching elements (5) is provided to be homogeneously distributed over the plate (8).
  • the induction heating cooker (1) comprises more than one fixing hole (10, 100) arranged on the plate (8) and more than one fixing element (11, 111) that provides the switching element (5) or the sensor (9) to be fastened onto the heat sink (7) with one end being fixed to the heat sink (7) by being passed through the fixing hole (10, 100) and over the switching element (5) or the sensor (9).
  • the switching elements (5) are placed onto the heat sink (7) and the fixing element (11) is fixed onto the heat sink (7) by being passed through the fixing hole (10) on the plate (8) and over the switching element (5).
  • the sensor (9) is preferably in circular or semi-circular form.
  • the sensor (9) is placed onto the fixing hole (100) on the plate (8) and the fixing element (111) is fixed onto the heat sink (7) by being passed over the sensor (9).
  • the mounting of the sensor (9) to the plate (8) is realized.
  • the plate (8) is produced from rectangular sheet metal.
  • the plate (8) is produced from aluminum. Since the aluminum is a material with high heat conduction coefficient, the heat transfer from the switching elements (5) to the plate (8) is improved.
  • the average temperature of the switching elements (5) is provided to be measured by placing the sensor (9) on a plate (8) whereto heat transfer is provided from the heat sink (7) and the switching elements (5).
  • the sensor (9) is placed on a plate (8) whereto heat transfer is provided from the heat sink (7) and the switching elements (5).

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Induction Heating Cooking Devices (AREA)
  • Electric Stoves And Ranges (AREA)

Claims (7)

  1. Cuisinière à chauffage par induction (1) comprenant une table supérieure (3) fabriquée à partir de matériaux tels que le verre ou la céramique et fournissant la fonction d'une table plus d'une bobine d'induction (2) étant disposée sous la table supérieure (3), fournissant le récipient de cuisson de caractéristique ferromagnétique placé sur celui-ci pour être chauffé par le champ magnétique qu'il génère, plus d'une carte de circuit (4) fournissant les bobines d'induction (2) à exciter, plus d'un élément de commutation (5) connecté à la carte de circuit (4), transportant un courant électrique de valeur élevée et chauffant sous l'effet du courant qu'elle porte, un ventilateur (6) disposé sous la table supérieure (3), au moins un dissipateur thermique (7) qui assure le refroidissement des éléments de commutation (5) placés sur celui-ci en distribuant l'air soufflé par le ventilateur (6), l'élément de commutation (5) fixé dans le dissipateur thermique (7), et unité de commande (12) qui commande l'excitation des éléments de commutation (5) suivant des données de température transmises par au moins un capteur (9) utilisé pour mesurer la température,
    caractérisée par
    - une plaque (8) réalisée à partir d'un matériau conducteur de la chaleur, placée de manière à venir en contact avec les éléments de commutation (5), avec les éléments de commutation (5) entre le dissipateur thermique (7) et la plaque (8),
    - dans lequel le au moins un capteur (9) est disposé sur la plaque (8) et utilisé pour mesurer la température de la plaque (8) et pour transmettre des données à l'unité de commande (12).
  2. Cuisinière à chauffage par induction (1) selon la revendication 1 ou 2, caractérisée par la plaque (8) est placée entre le capteur (9) et le dissipateur thermique (7).
  3. Cuisinière à chauffage par induction (1) selon l'une quelconque des revendications précédentes, caractérisée par la plaque (8) qui est placée longitudinalement sur le dissipateur thermique (7).
  4. Cuisinière à chauffage par induction (1) selon l'une quelconque des revendications précédentes, caractérisée par le capteur (9) qui est placé presque au centre de la plaque (8).
  5. Cuisinière à chauffage par induction (1) selon l'une quelconque des revendications précédentes, caractérisée par plus d'un trou de fixation (10, 100) disposé sur la plaque (8) et plus d'un élément de fixation (11, 111) qui fournit l'élément de commutation (5) ou le capteur (9) à fixer sur le dissipateur thermique (7) dont une extrémité est fixée au dissipateur thermique (7) en passant à travers le trou de fixation (10, 100) et au-dessus de l'élément de commutation (5) ou du capteur (9).
  6. Cuisinière à chauffage par induction (1) selon l'une quelconque des revendications précédentes, caractérisée par la plaque (8) qui est produite à partir d'une tôle rectangulaire.
  7. Cuisinière à chauffage par induction (1) selon l'une quelconque des revendications précédentes, caractérisée par la plaque (8) en aluminium.
EP12784223.5A 2011-11-04 2012-10-23 Cuisinière à chauffage par induction Active EP2774454B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR201111058 2011-11-04
PCT/EP2012/070979 WO2013064396A1 (fr) 2011-11-04 2012-10-23 Cuisinière à chauffage par induction

Publications (2)

Publication Number Publication Date
EP2774454A1 EP2774454A1 (fr) 2014-09-10
EP2774454B1 true EP2774454B1 (fr) 2018-08-08

Family

ID=47172597

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12784223.5A Active EP2774454B1 (fr) 2011-11-04 2012-10-23 Cuisinière à chauffage par induction

Country Status (4)

Country Link
EP (1) EP2774454B1 (fr)
ES (1) ES2694569T3 (fr)
TR (1) TR201718646T4 (fr)
WO (1) WO2013064396A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024056394A1 (fr) * 2022-09-13 2024-03-21 BSH Hausgeräte GmbH Dispositif d'appareil électroménager

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101728949B1 (ko) * 2015-06-22 2017-04-20 엘지전자 주식회사 전자 유도 가열 조리기 및 이의 구동 방법
KR102306811B1 (ko) * 2015-06-23 2021-09-30 엘지전자 주식회사 전자 유도 가열 조리기 및 이의 구동 방법
TR201615946A1 (tr) * 2016-11-08 2018-05-21 Arcelik As Bi̇r i̇ndüksi̇yon isiticili ocak
JP7018787B2 (ja) * 2018-03-05 2022-02-14 三菱電機株式会社 加熱調理器
FR3105908B1 (fr) * 2019-12-31 2022-01-14 Groupe Brandt Procédé de commande en puissance et table de cuisson mettant en œuvre ledit procédé
TR202013716A2 (tr) * 2020-08-31 2022-03-21 Arçeli̇k Anoni̇m Şi̇rketi̇ Soğutma performansi i̇yi̇leşti̇ri̇lmi̇ş bi̇r endüksi̇yonlu ocak
US11871499B2 (en) 2020-11-05 2024-01-09 Whirlpool Corporation Induction cooking apparatus with heatsink and method of assembly

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7148452B2 (en) * 2001-04-03 2006-12-12 Emerson Electric Co. Heat sink for printed circuit board components
KR101291428B1 (ko) 2006-12-14 2013-07-30 엘지전자 주식회사 조리기기
JP5279748B2 (ja) * 2010-03-19 2013-09-04 三菱電機株式会社 電磁調理器

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024056394A1 (fr) * 2022-09-13 2024-03-21 BSH Hausgeräte GmbH Dispositif d'appareil électroménager

Also Published As

Publication number Publication date
ES2694569T3 (es) 2018-12-21
EP2774454A1 (fr) 2014-09-10
TR201718646T4 (tr) 2017-12-21
WO2013064396A1 (fr) 2013-05-10

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