EP2578058B1 - Cuiseur à chauffage par induction - Google Patents

Cuiseur à chauffage par induction Download PDF

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Publication number
EP2578058B1
EP2578058B1 EP11723480.7A EP11723480A EP2578058B1 EP 2578058 B1 EP2578058 B1 EP 2578058B1 EP 11723480 A EP11723480 A EP 11723480A EP 2578058 B1 EP2578058 B1 EP 2578058B1
Authority
EP
European Patent Office
Prior art keywords
heat sink
fan
induction heating
heating cooker
disposed
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.)
Not-in-force
Application number
EP11723480.7A
Other languages
German (de)
English (en)
Other versions
EP2578058A1 (fr
Inventor
Haluk Karatas
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 EP2578058A1 publication Critical patent/EP2578058A1/fr
Application granted granted Critical
Publication of EP2578058B1 publication Critical patent/EP2578058B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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.
  • 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,
  • 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).

Landscapes

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

Claims (10)

  1. Un dispositif de chauffage à induction comprenant une plaque supérieure (3) produit d'un matériau comme verre ou céramique, plus d'une bobine d'induction (2) qui est disposée sous la plaque supérieure (3) et qui permet au récipient de cuisson ferromagnétique d'être chauffé par le champ magnétique qu'elle génère, plus d'une carte de circuit (4) qui permet aux bobines d'induction (2) d'être mises sous tension, plus d'un interrupteur (5) comme IGBT ou pont de diode qui est connecté aux cartes de circuit (4) et qui porte un courant électrique de valeur élevée et qui est surchauffé à cause de l'effet du courant, et une plaque inférieure (6) qui est disposée à la face inférieure de la plaque supérieure (3), sur laquelle les cartes de circuit (4) sont arrangées horizontalement et côte à côte à des intervalles,
    caractérisé par
    - une ouverture circulaire (7) qui est située sur la plaque inférieure (6) entre les cartes de circuit (4),
    - un ventilateur de type axial (8) qui est disposé dans l'ouverture (7), qui souffle l'air aspiré du dessous de la plaque inférieure (6) à travers les cartes de circuit (4) entre la plaque inférieure (6) et la plaque supérieure (3) et
    - un dissipateur thermique (10) comprenant un chapeau (9) qui est configuré symétriquement par rapport au centre (M) de l'ouverture (7) et qui est disposé sur l'ouverture (7) de manière à être concentrique avec le ventilateur (8) et entourer le ventilateur (8) ; les deux côtés latéraux opposés (K) du chapeau (9) s'allongeant sur les cartes de circuit (4), recouvrant le côté supérieur du ventilateur (8) et dirigeant l'air, qui est soufflé par le ventilateur vers le haut à travers l'ouverture (7) dans la direction verticale, aux interrupteurs (5) et aux cartes de circuit (4) se trouvant aux côtés latéraux (K) de celui-ci en le délivrant vers les côtés dans la direction horizontale.
  2. Un dispositif de chauffage à induction (1) selon la Revendication 1, caractérisé par le dissipateur thermique (10) qui comprend deux surfaces de refroidissement (11) formées en chanfreinant les côtés latéraux opposés (K) de celui-ci, sur lesquelles les interrupteurs (5) sont fixés, et comprend en outre plus d'une ailette de refroidissement (12) qui est disposée au-dessous des surfaces de refroidissement (11), arrangée parallèlement les unes aux autres et placée sur les surfaces supérieures des cartes de circuit (4).
  3. Un dispositif de chauffage à induction (1) selon la Revendication 1 ou 2, caractérisé par le dissipateur thermique (10) comprenant le chapeau (9) dont la partie central en face du ventilateur (8) est conique ou en forme de dôme.
  4. Un dispositif de chauffage à induction (1) selon la Revendication 3, caractérisé par le dissipateur thermique (10) comprenant le chapeau (9) dont la surface inférieure en face du ventilateur (8) est concave.
  5. Un dispositif de chauffage à induction (1) selon l'une quelconque des revendications précédentes, caractérisé par le dissipateur thermique (10) comprenant plus d'un guide d'air (13) qui est disposé sur les côtés avant et arrière de celui-ci et qui guide l'air soufflé par le ventilateur (8) vers les côtés latéraux (K).
  6. Un dispositif de chauffage à induction (1) selon la Revendication 5, caractérisé par le dissipateur thermique (10) comprenant deux guides d'air en forme de V (13) qui s'étendent symétriquement à partir des côtés avant et arrière de celui-ci vers le centre (M).
  7. Un dispositif de chauffage à induction (1) selon l'une quelconque des revendications précédentes, caractérisé par le dissipateur thermique (10) comprenant plus d'un séparateur (14) qui s'étend à partir des ailettes de refroidissement (12) vers le centre (M) dans la direction radiale.
  8. Un dispositif de chauffage à induction (1) selon la Revendication 7, caractérisé par les séparateurs (14) qui s'étendent à partir des ailettes de refroidissement (12) vers le centre (M) jusqu'à l'anneau (S) qui définit la limite de la région en forme de dôme au chapeau (9).
  9. Un dispositif de chauffage à induction (1) selon la Revendication 7 ou 8, caractérisé par le dissipateur thermique (10) comprenant plus d'une découpe (15) située à l'extrémité des séparateurs (14) s'étendant vers le centre (M).
  10. Un dispositif de chauffage à induction (1) selon l'une quelconque des revendications précédentes, caractérisé par le dissipateur thermique (10) où le pont de diode, qui est l'interrupteur (5) qui se réchauffe le plus, est disposé au centre de chaque surface de refroidissement (11) et les IGBTs, qui sont les interrupteurs (5) qui se réchauffent moins que le pont de diode, sont disposés aux côtés latéraux du pont de diode.
EP11723480.7A 2010-06-07 2011-06-07 Cuiseur à chauffage par induction Not-in-force EP2578058B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR201004569 2010-06-07
PCT/EP2011/059329 WO2011154373A1 (fr) 2010-06-07 2011-06-07 Cuiseur à chauffage par induction

Publications (2)

Publication Number Publication Date
EP2578058A1 EP2578058A1 (fr) 2013-04-10
EP2578058B1 true EP2578058B1 (fr) 2015-01-07

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EP11723480.7A Not-in-force EP2578058B1 (fr) 2010-06-07 2011-06-07 Cuiseur à chauffage par induction

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

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Publication number Priority date Publication date Assignee Title
EP2679913B1 (fr) * 2012-06-28 2019-08-07 BSH Hausgeräte GmbH Appareil ménager
WO2015196240A1 (fr) * 2014-06-23 2015-12-30 Breville Pty Limited Multicuiseur
EP3065506B1 (fr) * 2015-03-04 2020-10-28 Whirlpool Corporation Ensemble de refroidissement pour une table de cuisson à induction
KR101728949B1 (ko) * 2015-06-22 2017-04-20 엘지전자 주식회사 전자 유도 가열 조리기 및 이의 구동 방법
KR102060151B1 (ko) * 2018-03-23 2019-12-27 엘지전자 주식회사 인디케이터 구조가 개선된 유도 가열 장치
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

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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
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
JP2006302915A (ja) * 2006-08-08 2006-11-02 Mitsubishi Electric Corp 誘導加熱調理器
KR101291428B1 (ko) * 2006-12-14 2013-07-30 엘지전자 주식회사 조리기기
ES2321467B1 (es) 2007-08-24 2010-03-04 Bsh Electrodomesticos España, S.A. Disposicion de dispositivo de coccion.

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
CN102918926A (zh) 2013-02-06
WO2011154373A1 (fr) 2011-12-15
CN102918926B (zh) 2015-07-29
EP2578058A1 (fr) 2013-04-10

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