EP1303168B1 - Plaque de cuisson possédant une répartition discrète d'éléments chauffants - Google Patents
Plaque de cuisson possédant une répartition discrète d'éléments chauffants Download PDFInfo
- Publication number
- EP1303168B1 EP1303168B1 EP01124211.2A EP01124211A EP1303168B1 EP 1303168 B1 EP1303168 B1 EP 1303168B1 EP 01124211 A EP01124211 A EP 01124211A EP 1303168 B1 EP1303168 B1 EP 1303168B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooking
- heating elements
- cooking hob
- hob
- matrix
- 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.)
- Expired - Lifetime
Links
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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
- H05B6/06—Control, e.g. of temperature, of power
- H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
- H05B6/065—Control, e.g. of temperature, of power for cooking plates or the like using coordinated control of multiple induction coils
-
- 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
- H05B3/00—Ohmic-resistance heating
- H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
- H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
- H05B3/746—Protection, e.g. overheat cutoff, hot plate indicator
-
- 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 cooking hob comprising a plurality of electrically powered heating elements (for example resistors or halogen lamps) distributed below a heat-resistant surface (for example of glass ceramic) on which a utensil is placed for the heat treatment (for example, cooking, heating or thawing) of a food contained therein, the heating elements being disposed in matrix arrangement, in accordance with the introduction to the accompanying claim 1.
- electrically powered heating elements for example resistors or halogen lamps
- a heat-resistant surface for example of glass ceramic
- High versatility cooking hobs are known on which the user can locate several cooking utensils, even of different contour, in any desired regions and activate only those heating elements present in each of said regions; each corresponds at least approximately to the contour of the utensil itself.
- the heating elements are disposed in a matrix configuration.
- the first of the two said prior patents comprises a series of cooking regions and sensors which, associated with these regions, activate those covered by the cooking utensil.
- the purpose of this known solution is to avoid the use of switches or other user-operated control means.
- the heating elements are also disposed in matrix formation and are each associated with thermal load monitoring means, which cut off the power if the load is absent.
- the matrix arrangement of the heating elements provided therein has however the drawback of not enabling "zero" level (open circuit) to be obtained for other heating elements not required by the cooking utensil.
- US-A-5243171 discloses a food service system comprising a plurality of trays stached in a tralley and provided with thermistors for overseeing food temperatures.
- the thermistors are disposed in matrix configuration.
- the objects of the present invention are to provide a cooking hob comprising a plurality of matrix-arranged electrical heating elements which not only provides versatility but also offers the necessary protection from overtemperature and achieves power cut-off to those heating elements not required by the cooking utensil or utensils.
- the reference numeral 1 indicates overall a cooking hob comprising a conventional glass ceramic plate 2 on which cooking utensils of any form, indicated by 3 and 4, are rested in any regions of the plate 2.
- a heating element 5a, b, c etc. for example resistors disposed spirally to cover overall the maximum useful area of the plate 2.
- the heating element can be considered a "thermal cell", each cell being controllable substantially independent of the others or also in combination with other specific cells concerned, where these lie below one and the same cooking utensil; groups of cells can also be independently controlled where each group is dedicated to a different specific cooking utensil on the basis of its contour.
- the heating elements 5 are supported by an underplate 6 of electrically and thermally insulating material, bounded by a thermally insulating surrounding side wall 6A which together with the underplate 6 and plate 2 defines a compartment for containing the plurality of heating elements.
- the ends of the heating elements 5 are connected in this example to conductive pins 7 which pass through and project from the underplate 6.
- the pins 7 (see Figures 3 and 4 in particular) are intended to be engaged by conductive spring clips 10 rigid with printed circuit boards PCB supported via conventional columns 8 by a tray for example of sheet metal 9 forming part of the structure of the cooking hob 1.
- these printed circuit boards comprise conductive tracks, static switches 16,17 (for example triacs, mosfets, SCRs) and diodes.
- the underlying compartment 11 holds the electronic control circuit 12 for the static switches and possibly the static switches themselves.
- the tray 9 can contain a tangential fan 13 for cooling the static switches and diodes, and the underlying compartment can contain a bridge rectifier with non-filtered output (indicated by 14 in Figure 5 ) if the heating elements are to be powered from a half-wave supply of equal polarity.
- the fan can also be located at another "cold" point and the cooling air be fed through a conduit.
- the electronic control circuit 12 is connected to a touch screen 14A connected to a small CCD video camera 15A framing the cooking hob.
- the cooking hob appears on the screen 14A together with the cooking utensils positioned thereon, for example the two indicated by 3 and 4, the reproductions of which on the screen are identified by 3' and 4'.
- the user rests his finger on the reproductions 3' and 4' to hence select the heating elements 5 lying under the cooking utensils.
- the cooking power, cooking time and those parameters usually involved in conventional cooking hobs are selected by again resting the finger on the underlying part of the screen.
- the heating elements 5 form a matrix arrangement (see Figures 5, 6 , 7, 8 ), a diode 15 being connected in series with each heating element 5.
- the resistance elements are selected and controlled by the static switches 16A1, 16A2, 16A3, ... and 17A1, 17A2, 17A3 ... 17An which are controlled by the control circuit 12 in the manner described hereinafter, such as to operate those heating elements 5 required by the cooking utensils (for example 3, 4), with the power chosen by the user.
- the cooking utensil "covers" the four heating elements 5a, b, h and i.
- the user touches the utensil image on the touch screen to select those heating elements and touches the touch screen to insert the desired power and start the heating process.
- the static switches 16A1, 16A2, 17A1 and 17A2 operate, controlled by the electronic control circuit.
- Figure 6 shows a resistor and diode matrix of different configuration. It corresponds functionally to that of Figure 5 so that the same reference numerals are used in Figure 6 for equal or corresponding parts.
- the matrix configuration of Figure 6 has the advantage of allowing the diodes 15 and static switches 16A and 17A to be located to the side of the cooking hob (the left limit of which is identified in the figure by the dashed straight line x-x), hence in that "cold" region well known for example in cooking hobs with lateral controls.
- the diodes 15 are disposed in the reverse direction, as are the signs of the rectifier output.
- the matrixes of Figures 7 and 8 correspond respectively to those of Figures 5 and 6 .
- the same reference numerals with apostrophes are used to indicate equal or corresponding parts.
- the matrixes are however intended to be powered by an alternating current source 14', this requiring the diodes 15' to be arranged alternately from one heating element to the next.
- the static switches 16' and 17' can be SCRs or MOSFETs instead of TRIACs.
- the heating elements are controlled in the following manner.
- the heating elements 5a, b, c etc. are dimensioned to dissipate a power much greater than the value generally used in conventional cooking hobs, which is about 7 Watt/cm 2 (at least twice, but preferably from 4 to 8 times, and even more preferably greater than or equal to 15 Watt/cm 2 ). This means that the heating elements 5b, b Vietnamese must be connected by static switches 16, 17 to the line voltage in pulsed mode to prevent them and the overlying glass ceramic plate 2 from undergoing damage.
- Control can be by the full-wave method (in which the static switches 16, 17 relative to the rows and columns of the matrix are activated when the feed voltage crosses zero).
- thermal power of the heating element (5a, b, c.7) is greater than the maximum allowable mean power enables the power to be distributed between several cooking utensils and avoid activating those regions of the cooking hob not covered by the cooking utensil, as will be clear from the following description given by way of example with reference to Figures 9A-9M and 10A-10M , where Figures 9A-9M relate to a solution for pure comparison purposes whereas Figures 10A-10M relate to a solution in accordance with an aspect of the invention.
- the power level for the region A is equal to 80% of the maximum allowable mean power, and that of the region B is equal to 40% of said power.
- region A has to receive 80% of the maximum allowable mean power with only 4 half-waves of the uprated power, whereas for region B 40% of the maximum allowable mean power is required and hence each underlying heating element must be powered with only two half-waves of the uprated power.
- the powering method distributes the half-waves in each time interval T 1 ...T 10 ( Figures 10B-10M ) within the control period T such as to: achieve the desired power level; minimize the difference between the number of resistance elements powered in each of the component time intervals T t of the control period T to reduce flicker (in the example the difference between these powered resistance elements never exceeds 1); prevent that, during each time interval (T 1 , T 2 , T 3 - T n ), line and column combinations are activated which power resistance elements not required by the cooking utensil.
- each of the matrixes relative to the times T 1 to T 10 is such that resistance elements not covered by the cooking utensil are not activated.
- this is expressed by the fact that each of these matrixes (T 1 -T 10 ), known as time matrixes, must necessarily be of unitary rank.
- the time matrix represents in a given time interval the energy state (on-off) of the heating element elements.
- the rank of a matrix is the number of rows/columns which are linearly independent, i.e. which cannot be obtained by a linear combination of the other rows/columns.
- the heating elements are positioned along the same column, indicating that the matrix is of rank 1; the matrix for example of Figures 10B and 10C is also of rank 1 as the heating elements are repeated identically in the adjacent column.
- the time matrix has been chosen as 10 elements only for simplification purposes.
- the time base will in fact be chosen equal to the number of energy levels for the ratio of galvanic power to the maximum allowable mean power (with 10 energy levels of regulation, the time matrix will preferably be of 40 elements).
- Figure 11 shows the voltage variation with time across three resistance elements for example; these three resistance elements are those indicated by Z 1 , Z 2 and Z 3 in Figures 10B-10M .
- the ten matrixes T 1 -T 10 form overall a matrix D(i.j.t) the values of which are 0 (resistance element inactive) or 1 (resistance element active).
- the indexes i and j relate to the rows and columns and t to the time interval considered.
- the time matrix has been chosen as 10 elements only for simplification purposes.
- the time base will in fact be chosen equal to the number of energy levels for the ratio of galvanic power to the maximum allowable mean power (with 10 energy levels of regulation, the time matrix will preferably be of 40 elements).
- the cooking hob is provided with a total absorbed current sensor (for example a Hall sensor) at the mains supply, which on sensing a dangerous current intensity totally deactivates the cooking hob, either directly or indirectly (by comparison with the value provided by a control algorithm).
- a total absorbed current sensor for example a Hall sensor
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Electric Stoves And Ranges (AREA)
- Control Of Resistance Heating (AREA)
- Surface Heating Bodies (AREA)
Claims (12)
- Plaque de cuisson comprenant une plaque de vitrocéramique (2) et une pluralité sous-jacente d'éléments électriques chauffants (5) disposés en configuration matricielle et commandés par des commutateurs statiques (16, 17) de manière à être à même d'utiliser à volonté n'importe quelle région de ladite plaque pour chauffer le contenu d'un ou plusieurs ustensiles de cuisson (3, 4), caractérisée en ce qu'une diode (15) est présente en série avec chaque élément électrique chauffant (5) et en ce que les éléments chauffants sont dimensionnés de manière à dissiper une énergie supérieure ou égale à 15 watts/cm2.
- Plaque de cuisson selon la revendication 1, caractérisée en ce que les diodes (15) et les commutateurs statiques (16, 17) sont disposés dans un compartiment en dessous des éléments chauffants (5) et séparés thermiquement de ceux-ci, de préférence frappés par un courant d'air de refroidissement.
- Plaque de cuisson selon la revendication 2, caractérisée en ce que, dans ledit compartiment, il y a au moins une carte de circuits imprimés (PCB) portant des pistes relatives aux connexions électriques matricielles.
- Plaque de cuisson selon au moins l'une quelconque des revendications précédentes, caractérisée en ce que la carte de circuits imprimés (PCB) présente des pinces élastiques de contact (10), les éléments électriques chauffants (5) étant associés à des broches de contact (7) qui sont engagées par lesdites pinces de manière amovible.
- Plaque de cuisson selon la revendication 4, caractérisée en ce que les diodes (15) sont supportées par ladite carte de circuit imprimés (PCB).
- Plaque de cuisson selon au moins l'une quelconque des revendications précédentes, caractérisée en ce que les commutateurs statiques (16, 17) sont commandés par un circuit de commande électronique (12) qui reçoit des informations relatives à la position ou aux positions assumées sur la plaque (2) par un ou plusieurs ustensiles de cuisson (3, 4) et aux niveaux d'énergie réglés par l'utilisateur pour chaque ustensile de cuisson afin de faire fonctionner, au moyen des commutateurs statiques (16, 17), les éléments chauffants (5) correspondant à ladite ou auxdites positions afin de fournir à chaque ustensile de cuisson une énergie réglable indépendamment de l'énergie, également réglable, du ou des autres ustensiles de cuisson présents.
- Plaque de cuisson selon la revendication 3, caractérisée en ce que les éléments de résistance (5) sont brasés par leurs bornes à la carte ou aux cartes de circuits imprimés (PCB).
- Plaque de cuisson selon la revendication 1, caractérisée en ce qu'elle comprend un circuit de commande électronique (12) pour commander les commutateurs statiques (16, 17), lequel circuit reçoit des données de traitement d'un écran tactile (14a) connecté à une caméra vidéo (15a) balayant la plaque de cuisson.
- Plaque de cuisson selon la revendication 3, caractérisée en ce qu'elle comprend un capteur de courant mesurant le courant acheminé à ladite plaque et intervenant directement ou indirectement pour assurer une désactivation totale de la plaque de cuisson lors de la mesure d'un courant dépassant la valeur fournie par l'algorithme de commande.
- Plaque de cuisson selon la revendication 1, caractérisée en ce que le nombre de commutateurs statiques est inférieur au nombre d'éléments chauffants.
- Procédé de commande pour une plaque de cuisson selon la revendication 1, comprenant une plaque vitrocéramique (2) et une pluralité sous-jacente d'éléments électriques chauffants (5) disposés en configuration matricielle et commandés par des commutateurs statiques présents en nombre inférieur au nombre d'éléments chauffants afin de pouvoir utiliser à volonté n'importe quelle région de ladite plaque de cuisson pour chauffer le contenu d'un ou plusieurs ustensiles de cuisson, ladite matrice comprenant une diode en série avec chaque élément de résistance, dans laquelle les éléments électriques chauffants sont alimentés en tension de ligne en mode pulsé et au moins deux régions différentes (A, B) de la plaque peuvent être excitées à deux différents niveaux d'énergie, la matrice qui représente dans chaque impulsion l'état d'énergie des éléments chauffants (marche-arrêt) ayant un rang unitaire.
- Procédé selon la revendication 11, caractérisé en ce que, entre les impulsions individuelles relatives au cycle de commande principal, le nombre d'éléments de résistance actifs est minimal, de préférence inférieur ou égal à un.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01124211.2A EP1303168B1 (fr) | 2001-10-12 | 2001-10-12 | Plaque de cuisson possédant une répartition discrète d'éléments chauffants |
ES01124211.2T ES2567796T3 (es) | 2001-10-12 | 2001-10-12 | Placa de cocina con elementos de calentamiento discretos distribuidos |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01124211.2A EP1303168B1 (fr) | 2001-10-12 | 2001-10-12 | Plaque de cuisson possédant une répartition discrète d'éléments chauffants |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1303168A1 EP1303168A1 (fr) | 2003-04-16 |
EP1303168B1 true EP1303168B1 (fr) | 2016-03-16 |
Family
ID=8178916
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01124211.2A Expired - Lifetime EP1303168B1 (fr) | 2001-10-12 | 2001-10-12 | Plaque de cuisson possédant une répartition discrète d'éléments chauffants |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1303168B1 (fr) |
ES (1) | ES2567796T3 (fr) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10605464B2 (en) | 2012-10-15 | 2020-03-31 | Whirlpool Corporation | Induction cooktop |
US10893579B2 (en) | 2017-07-18 | 2021-01-12 | Whirlpool Corporation | Method for operating an induction cooking hob and cooking hob using such method |
US10993292B2 (en) | 2017-10-23 | 2021-04-27 | Whirlpool Corporation | System and method for tuning an induction circuit |
US11140751B2 (en) | 2018-04-23 | 2021-10-05 | Whirlpool Corporation | System and method for controlling quasi-resonant induction heating devices |
US11212880B2 (en) | 2012-10-15 | 2021-12-28 | Whirlpool Emea S.P.A. | Induction cooking top |
US12063731B2 (en) | 2021-03-01 | 2024-08-13 | Whirlpool Corporation | System and method for tuning an induction circuit |
Families Citing this family (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITMI20031602A1 (it) * | 2003-08-04 | 2005-02-05 | Whirlpool Co | Piano di cottura a piazzamento casuale con interfaccia utente |
DE10337538A1 (de) * | 2003-08-06 | 2005-02-24 | E.G.O. Elektro-Gerätebau GmbH | Vorrichtung und Verfahren zur Bedienung eines Kochsystems |
KR20050026598A (ko) | 2003-09-09 | 2005-03-15 | 삼성전자주식회사 | 전기조리기 및 그 제어방법 |
DE10345352A1 (de) | 2003-09-18 | 2005-04-14 | E.G.O. Elektro-Gerätebau GmbH | Bedienvorrichtung und Bedienverfahren für ein elektrisches Haushaltsgerät |
DE102004003126B4 (de) * | 2004-01-14 | 2012-02-23 | E.G.O. Elektro-Gerätebau GmbH | Ansteuerungsverfahren für Heizelemente und Vorrichtung |
ES2310962B1 (es) * | 2006-12-04 | 2009-10-23 | Bsh Electrodomesticos España, S.A. | Circuito de dispositivo de calentamiento. |
ES2304892B1 (es) * | 2007-04-09 | 2009-06-04 | Bsh Electrodomesticos España, S.A. | Campo de coccion y procedimiento para el accionamiento de un campo de coccion. |
ES2331037B1 (es) * | 2007-10-25 | 2010-09-21 | Bsh Electrodomesticos España, S.A. | Campo de coccion y procedimiento para el accionamiento de un campo de coccion. |
ES2340900B1 (es) * | 2008-04-30 | 2011-05-11 | Bsh Electrodomestiscos España, S.A. | Mandocampo de coccion con varios elementos de calentamiento y una unidad de. |
DE102008042512A1 (de) * | 2008-09-30 | 2010-04-01 | BSH Bosch und Siemens Hausgeräte GmbH | Kochfeld und Verfahren zum Betreiben eines Kochfelds |
JP2010153730A (ja) * | 2008-12-26 | 2010-07-08 | Omron Corp | 配線構造、ヒータ駆動装置、計測装置および制御システム |
ES2356780B1 (es) | 2009-01-20 | 2012-03-13 | Bsh Electrodomésticos España, S.A. | Campo de cocción con al menos una zona de calentamiento de varios elementos de calentamiento. |
ES2388269B1 (es) | 2010-03-03 | 2013-08-23 | BSH Electrodomésticos España S.A. | Encimera de cocción con al menos una zona de cocción, y procedimiento para accionar una encimera de cocción. |
JP5062272B2 (ja) * | 2010-03-11 | 2012-10-31 | オムロン株式会社 | 温度制御システム |
FR2978530B1 (fr) | 2011-07-26 | 2013-08-02 | Fagorbrandt Sas | Table de cuisson et procede de commande en fonctionnement d'une table de cuisson |
AU2015203200B2 (en) * | 2011-08-30 | 2016-06-02 | Watlow Electric Manufacturing Company | Thermal array system |
EP2752080B1 (fr) * | 2011-08-30 | 2023-06-14 | Watlow Electric Manufacturing Company | Système et procédé de commande d'un réseau thermique |
AU2015203198B2 (en) * | 2011-08-30 | 2017-03-09 | Watlow Electric Manufacturing Company | Thermal array system |
ES2439417B1 (es) | 2012-07-20 | 2015-03-12 | Bsh Electrodomesticos Espana | Dispositivo de campo de cocción |
US9345068B2 (en) | 2012-07-26 | 2016-05-17 | Hewlett-Packard Development Company, L.P. | Electrical resistor heating |
EP2731402B1 (fr) * | 2012-11-09 | 2015-08-19 | Electrolux Home Products Corporation N.V. | Procédé permettant de commander une plaque de cuisson à induction avec plusieurs bobines d'induction et plaque de cuisson à induction |
US9518946B2 (en) | 2013-12-04 | 2016-12-13 | Watlow Electric Manufacturing Company | Thermographic inspection system |
ES2673131B1 (es) | 2016-12-19 | 2019-03-28 | Bsh Electrodomesticos Espana Sa | Dispositivo de aparato domestico de coccion por induccion con una matriz de elementos de calentamiento |
ES2673132B1 (es) * | 2016-12-19 | 2019-03-28 | Bsh Electrodomesticos Espana Sa | Dispositivo de aparato de cocción por inducción. |
DE102017211099A1 (de) * | 2017-06-29 | 2019-01-03 | E.G.O. Elektro-Gerätebau GmbH | Induktionskochvorrichtung und Verfahren zur Ansteuerung einer Induktionskochvorrichtung |
US10761041B2 (en) | 2017-11-21 | 2020-09-01 | Watlow Electric Manufacturing Company | Multi-parallel sensor array system |
US20190327792A1 (en) * | 2018-04-23 | 2019-10-24 | Whirlpool Corporation | Control circuits and methods for distributed induction heating devices |
DE102018217617A1 (de) | 2018-10-15 | 2020-04-16 | Robert Bosch Gmbh | Verfahren zum Herstellen einer Getriebeschnecke, die insbesondere auf einer Ankerwelle angeordnet ist, sowie eine solche Getriebeschnecke |
DE102019202602A1 (de) * | 2019-02-26 | 2020-08-27 | E.G.O. Elektro-Gerätebau GmbH | Elektrische Heizeinrichtung für ein Kochfeld und Kochfeld |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8827611D0 (en) * | 1988-11-25 | 1988-12-29 | Gerard Gamble Ltd | Food service system |
DE4007680A1 (de) * | 1990-03-10 | 1991-09-19 | Grass Ag | Heizplatte |
EP0862714B1 (fr) * | 1995-11-21 | 2003-02-19 | Aktiebolaget Electrolux | Surface de cuisson et son systeme de commande |
-
2001
- 2001-10-12 EP EP01124211.2A patent/EP1303168B1/fr not_active Expired - Lifetime
- 2001-10-12 ES ES01124211.2T patent/ES2567796T3/es not_active Expired - Lifetime
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10605464B2 (en) | 2012-10-15 | 2020-03-31 | Whirlpool Corporation | Induction cooktop |
US11212880B2 (en) | 2012-10-15 | 2021-12-28 | Whirlpool Emea S.P.A. | Induction cooking top |
US11655984B2 (en) | 2012-10-15 | 2023-05-23 | Whirlpool Corporation | Induction cooktop |
US10893579B2 (en) | 2017-07-18 | 2021-01-12 | Whirlpool Corporation | Method for operating an induction cooking hob and cooking hob using such method |
US10993292B2 (en) | 2017-10-23 | 2021-04-27 | Whirlpool Corporation | System and method for tuning an induction circuit |
US11140751B2 (en) | 2018-04-23 | 2021-10-05 | Whirlpool Corporation | System and method for controlling quasi-resonant induction heating devices |
US12063731B2 (en) | 2021-03-01 | 2024-08-13 | Whirlpool Corporation | System and method for tuning an induction circuit |
Also Published As
Publication number | Publication date |
---|---|
ES2567796T3 (es) | 2016-04-26 |
EP1303168A1 (fr) | 2003-04-16 |
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