WO2011154373A1 - Cuiseur à chauffage par induction - Google Patents

Cuiseur à chauffage par induction Download PDF

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Publication number
WO2011154373A1
WO2011154373A1 PCT/EP2011/059329 EP2011059329W WO2011154373A1 WO 2011154373 A1 WO2011154373 A1 WO 2011154373A1 EP 2011059329 W EP2011059329 W EP 2011059329W WO 2011154373 A1 WO2011154373 A1 WO 2011154373A1
Authority
WO
WIPO (PCT)
Prior art keywords
fan
heat sink
disposed
induction heating
heating cooker
Prior art date
Application number
PCT/EP2011/059329
Other languages
English (en)
Inventor
Haluk Karatas
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
Priority to CN201180028216.3A priority Critical patent/CN102918926B/zh
Priority to EP11723480.7A priority patent/EP2578058B1/fr
Publication of WO2011154373A1 publication Critical patent/WO2011154373A1/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
    • H05B2206/00—Aspects relating to heating by electric, magnetic, or electromagnetic fields covered by group H05B6/00
    • H05B2206/02—Induction heating
    • H05B2206/022—Special supports for the induction coils

Definitions

  • the present invention relates to an induction heating cooker the electronic elements carrying high current of which are cooled.
  • the induction heating cooker functions according to the principle of heating a cast iron or steel ferromagnetic cooking container by 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.
  • the electronic elements like the capacitor and relay on the circuit board can also be overheated. An effective cooling system is required so that all the elements on the circuit board 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 fan and the heat sink need to be disposed in the narrow volume between the upper plate wherein the induction coil is located and the supporting lower plate disposed below, the capacities of the fan and the heat sink are insufficient for providing the necessary cooling efficiency.
  • operating the fan used for cooling at high speed results in increase of noise.
  • JP2006302915 a heat sink that is used in an induction heating cooker is explained, providing the overheated electronic elements to be cooled by means of a fan. In order to prevent noise from increasing in the induction heating cooker, the rotational speed of the fan is reduced. Furthermore, the fan and the heat sink are disposed inside a chamber housing, providing effective air current passage from the heat sink.
  • JP2007234623 a two-piece heat sink that is used in an electromagnetic cooking device is explained, providing the overheated electronic elements to be cooled by means of a fan, the tip surfaces of the cooling fins of which extend towards each other.
  • the aim of the present invention is the realization of an induction heating cooker having a heat sink which provides the electronic elements carrying high current and overheated to be effectively and quietly cooled.
  • the circuit boards providing control of the induction coils are arranged horizontally side by side at intervals on the lower plate below the induction coils and an opening is located on the lower plate in the region corresponding to between the circuit boards.
  • An axial type fan is disposed at the opening and the fan blows the air sucked from the outside to between the lower plate and the upper plate through the opening.
  • a heat sink is disposed over the opening on the lower plate so as to surround the fan and be concentric with the fan.
  • the two opposite lateral sides of the heat sink extend over the circuit boards and the cooling fins located on the sides are seated on the circuit boards.
  • the heat sink is closed by a cap that covers the upper side of the fan, the middle portion facing the fan of which is concave and that distributes the air blown upwards from the opening to the sides in the radial direction.
  • the cap directs the air coming from the fan to the cooling fins at the lateral sides of the heat sink, from the cooling fins to the circuit boards and towards the lower sides of the cooling surfaces on the opposite sides of the heat sink whereon the switching elements are disposed.
  • the heat sink comprises two air guides, extending symmetrically from the front and rear sides to the center of the heat sink, configured as a V shaped recess and the arms of which forming the V shape direct the air blown by the fan to the sides, under the cooling surfaces on the sides and to the cooling fins.
  • the heat sink comprises separators disposed on the lower surface of the cap and extending in the radial direction towards the center of the heat sink from the cooling fins on the right and left sides.
  • the separators extend from the cooling fins towards the center of the heat sink, up to the ring that defines the border of the dome shaped concave region on the cap.
  • the separators at the heat sink have cut-outs at their end portions that extend towards the center of the heat sink, providing a fan with a wide diameter size to be arranged in the middle of the separators.
  • the diode bridge which is the most heating switching element is disposed at the center portion of each cooling surface on two opposite lateral sides of the heat sink and the IGBT’s are disposed at the sides of the diode bridge which are switching elements heating less than the diode bridge.
  • the circuit boards and the switching elements connected to the circuit boards are cooled effectively in the narrow volume between the upper plate and the lower plate, they are prevented from overheating and safety is increased. Furthermore, the axial fan which is lower in cost and operates with less noise than the radial fans can be used.
  • Figure 1 – is the schematic view of an induction heating cooker.
  • Figure 2 – is the schematic view of an induction heating cooker in another embodiment of the present invention.
  • Figure 3 – is the perspective view of the heat sink used in an induction heating cooker.
  • Figure 4 – is the top view of the circuit boards and the heat sink disposed between the circuit boards that are used in an induction heating cooker.
  • the induction heating cooker (1) comprises an upper plate (3) made of a material like glass or ceramic, more than one induction coil (2) disposed under the upper plate (3), providing the cooking container of ferromagnetic feature disposed 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) like IGBT (Insulated Gate Bipolar Transistor) or diode bridge connected to the circuit boards (4) and carrying high value electric current, overheating due to effect of the current and a lower plate (6) disposed at the underside of the upper plate (3), whereon the circuit boards (4) are arranged horizontally, side by side at intervals.
  • IGBT Insulated Gate Bipolar Transistor
  • the induction heating cooker (1) of the present invention comprises,
  • -an axial type fan (8) disposed in the opening (7) so as to rotate around the axis passing from the center (M) of the opening (7), blowing the air sucked from the underside of the lower plate (6) through the circuit boards (4) to between the lower plate (6) and the upper plate (3) and
  • a heat sink (10) having a cap (9), configured symmetrically with respect to the center (M) of the circular opening (7), disposed over the opening (7) to be concentric with the fan (8) and surrounding the fan (8), the two opposite lateral sides (K) of which lie over the circuit boards (4), cover the upper side of the fan (8) and direct the air the fan (8) blows upwards through the opening (7) in the vertical direction to the switching elements (5) and the circuit boards (4) at the lateral sides (K) thereof by distributing it to the sides in the horizontal direction.
  • the heat sink (10) comprises two cooling surfaces (11) formed by chamfering all along the opposite lateral sides (K), onto which the switching elements (5) are attached and more than one cooling fin (12), disposed below the cooling surfaces (11), arranged parallel to each other and seated on the upper surface of the circuit boards (4).
  • the cap (9) directs the air blown by the fan (8) to the cooling surfaces (11) and the cooling fins (12) on the lateral sides (K).
  • the middle portion of the cap (9) covering the heat sink (10) which faces the fan (8) is conical or dome shaped, the air blown upwards through the opening (7) by the fan (8) is directed to below the cooling surfaces (11) and the cooling fins (12) at the opposite lateral sides (K) by lowering the turbulence losses (Figure 1, Figure 2).
  • the lower surface of the cap (9) facing the fan (8) is concave ( Figure 1, Figure 2).
  • induction coils (2) are disposed in the induction heating cooker (1) and two circuit boards (4) providing the induction coils (2) to be supplied with high value current are used.
  • Each of the circuit boards (4) controls two induction coils (2).
  • Two circuit boards (4) are arranged horizontally, side by side, at intervals on the lower plate (6) and the fan (8) is disposed in the opening (7) between two circuit boards (4) on the lower plate (6).
  • the fan (8) blows the air sucked from under the lower plate (6) upwards and the concave lower surface facing the fan (8) of the cap (9) covering upper side of the fan (8) directs towards the opposite lateral sides (K) of the heat sink (10) in parallel direction to the lower plate (6) by distributing the air blown upwards by the fan (8) in the horizontal direction.
  • the air distributed by the cap (9) in the heat sink (10) in the radial direction passes between the cooling fins (12) under the cooling surfaces (11) and sweeps the upper surfaces of the circuit boards (4) at the right and left sides of the heat sink (10).
  • the air blown by the fan (8) cools both the switching elements (5) attached to the cooling surfaces (11) and also the other electronic elements disposed on the circuit boards (4) like the capacitor and relay.
  • the heat sink (10) comprises more than one air guide (13) disposed on the front and rear sides thereof, which guide the air blown by the fan (8) towards the lateral sides (K) ( Figure 3, Figure 4).
  • the heat sink (10) comprises two V shaped air guides (13) that extend symmetrically from the front and rear sides thereof towards the center (M) ( Figure 3, Figure 4).
  • the heat sink (10) comprises more than one separator (14), disposed at the lower surface of the cap (9), extending from at least one cooling fin (12) on the right and left lateral sides (K) towards the center (M) in the radial direction.
  • the separators (14) provide the air blown upwards by the fan (8) and distributed sideways in the radial direction by means of the cap (9), to be distributed homogeneously under the cooling surfaces (11) and to the cooling fins (12) and the switching elements (5) attached to the cooling surfaces (11) and the other elements on the circuit boards (4) to be effectively cooled.
  • the separators (14) extend from the cooling fins (12) towards the center (M) up to the ring (S) that defines the border of the dome shaped region at the cap (9) ( Figure 3, Figure 4).
  • a volume is gained in the heat sink (10) between the separators (14) wherein the fan (8) can be placed.
  • the fan (8) since the fan (8) is disposed in the heat sink (10) between the separators (14), the distance between the lower plate (6) and the upper plate (3) is not required to be increased for positioning of the fan (8).
  • the heat sink (10) comprises more than one cut-out (15) at the end portions of the separators (14) extending towards the center (M) and which provides a fan (8) with a wide diameter size to be disposed in the middle of the separators (14) ( Figure 2, Figure 3).
  • the diode bridge which is the most heating switching element (5) is disposed at the center portion of each cooling surface (11) of the heat sink (10) and the IGBT’s, which are switching elements (5) heating less than the diode bridge, are disposed at the sides of the diode bridges ( Figure 4).
  • the diode bridge, which is the most heating switching element (5) is cooled effectively by being connected to the heat sink (10) at the nearest position to the fan (8).
  • the circuit boards (4) and the switching elements (5) connected to the circuit boards (4) are cooled effectively in the narrow volume between the upper plate (3) and the lower plate (6) and prevented from overheating.
  • the heat sink (10) due to its configuration, allows the use of the axial type fan (8) with low volumetric flow, the cost of the fan (8) and the noise generated during operation of the fan (8) are decreased. Furthermore, since the fan (8) and the heat sink (10) are disposed one into the other, less amount of space is occupied between the lower plate (6) and the upper plate (3).

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

Abstract

La présente invention porte sur un cuiseur à chauffage par induction (1), qui comprend plus d'une bobine d'induction (2), produisant le chauffage par le champ magnétique qu'elle génère du récipient de cuisson à caractéristiques ferromagnétiques disposé sur celle-ci, une plaque supérieure (3) disposée au-dessus des bobines d'induction (2), produite en un matériau tel que le verre ou une céramique, plus d'une carte de circuits (4) produisant l'alimentation des bobines d'induction (2), plus d'un élément de commutation (5), tel qu'un transistor bipolaire à grille isolée ou un pont de diodes, connecté aux cartes de circuits (4), acheminant un courant électrique de forte valeur et surchauffé sous l'effet du courant, et une plaque inférieure (6) disposée sur la face inférieure de la plaque supérieure (3), sur laquelle les cartes de circuit (4) sont disposées horizontalement côte à côte par intervalles, un ventilateur de type axial (8) disposé dans une ouverture (7) située sur la plaque inférieure (6), et un dissipateur thermique (10) disposé sur l'ouverture (7) de façon à être concentrique au ventilateur (8) et entourant le ventilateur (8).
PCT/EP2011/059329 2010-06-07 2011-06-07 Cuiseur à chauffage par induction WO2011154373A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201180028216.3A CN102918926B (zh) 2010-06-07 2011-06-07 感应加热烹调器
EP11723480.7A EP2578058B1 (fr) 2010-06-07 2011-06-07 Cuiseur à chauffage par induction

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TRA2010/04569 2010-06-07
TR201004569 2010-06-07

Publications (1)

Publication Number Publication Date
WO2011154373A1 true WO2011154373A1 (fr) 2011-12-15

Family

ID=44260237

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/059329 WO2011154373A1 (fr) 2010-06-07 2011-06-07 Cuiseur à chauffage par induction

Country Status (3)

Country Link
EP (1) EP2578058B1 (fr)
CN (1) CN102918926B (fr)
WO (1) WO2011154373A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2679913A3 (fr) * 2012-06-28 2014-10-15 BSH Bosch und Siemens Hausgeräte GmbH Dispositif d'appareil ménager
EP3065506A1 (fr) * 2015-03-04 2016-09-07 Whirlpool Corporation Ensemble de refroidissement pour une table de cuisson à induction
US20160374155A1 (en) * 2015-06-22 2016-12-22 Lg Electronics Inc. Induction heat cooking apparatus and method for driving the same
US11153942B2 (en) * 2018-03-23 2021-10-19 Lg Electronics Inc. Induction heating device having improved indicator structure
EP3962239A1 (fr) * 2020-08-31 2022-03-02 Arçelik Anonim Sirketi Appareil de cuisson à chauffage par induction présentant une meilleure performance de refroidissement

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015196240A1 (fr) * 2014-06-23 2015-12-30 Breville Pty Limited Multicuiseur
US11871499B2 (en) 2020-11-05 2024-01-09 Whirlpool Corporation Induction cooking apparatus with heatsink and method of assembly
WO2024056394A1 (fr) * 2022-09-13 2024-03-21 BSH Hausgeräte GmbH Dispositif d'appareil électroménager

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05121155A (ja) * 1991-10-28 1993-05-18 Matsushita Electric Ind Co Ltd 電磁誘導加熱調理器
JP2006302915A (ja) * 2006-08-08 2006-11-02 Mitsubishi Electric Corp 誘導加熱調理器
JP2007234623A (ja) * 2003-03-25 2007-09-13 Mitsubishi Electric Corp 電磁調理器
EP2028912A2 (fr) 2007-08-24 2009-02-25 BSH Bosch und Siemens Hausgeräte GmbH Agencement de dispositif de cuisson

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005063777A (ja) * 2003-08-11 2005-03-10 Tiger Vacuum Bottle Co Ltd 電磁誘導加熱調理器
JP4384099B2 (ja) * 2005-09-09 2009-12-16 日立アプライアンス株式会社 誘導加熱調理器
CN1937902B (zh) * 2005-09-19 2012-03-07 株式会社三社电机制作所 发热部件的冷却结构
KR101291428B1 (ko) * 2006-12-14 2013-07-30 엘지전자 주식회사 조리기기

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05121155A (ja) * 1991-10-28 1993-05-18 Matsushita Electric Ind Co Ltd 電磁誘導加熱調理器
JP2007234623A (ja) * 2003-03-25 2007-09-13 Mitsubishi Electric Corp 電磁調理器
JP2006302915A (ja) * 2006-08-08 2006-11-02 Mitsubishi Electric Corp 誘導加熱調理器
EP2028912A2 (fr) 2007-08-24 2009-02-25 BSH Bosch und Siemens Hausgeräte GmbH Agencement de dispositif de cuisson

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2679913A3 (fr) * 2012-06-28 2014-10-15 BSH Bosch und Siemens Hausgeräte GmbH Dispositif d'appareil ménager
EP3065506A1 (fr) * 2015-03-04 2016-09-07 Whirlpool Corporation Ensemble de refroidissement pour une table de cuisson à induction
US10278239B2 (en) 2015-03-04 2019-04-30 Whirlpool Corporation Cooling assembly for an induction hob
US20160374155A1 (en) * 2015-06-22 2016-12-22 Lg Electronics Inc. Induction heat cooking apparatus and method for driving the same
US10477629B2 (en) * 2015-06-22 2019-11-12 Lg Electronics Inc. Induction heat cooking apparatus and method for driving the same
US11153942B2 (en) * 2018-03-23 2021-10-19 Lg Electronics Inc. Induction heating device having improved indicator structure
EP3962239A1 (fr) * 2020-08-31 2022-03-02 Arçelik Anonim Sirketi Appareil de cuisson à chauffage par induction présentant une meilleure performance de refroidissement

Also Published As

Publication number Publication date
CN102918926A (zh) 2013-02-06
EP2578058B1 (fr) 2015-01-07
CN102918926B (zh) 2015-07-29
EP2578058A1 (fr) 2013-04-10

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