ES2272879T5 - A DEVICE FOR DETERMINING THE POSITION OF KITCHEN UTENSILS ON A KITCHEN PLATE. - Google Patents
A DEVICE FOR DETERMINING THE POSITION OF KITCHEN UTENSILS ON A KITCHEN PLATE. Download PDFInfo
- Publication number
- ES2272879T5 ES2272879T5 ES03028048T ES03028048T ES2272879T5 ES 2272879 T5 ES2272879 T5 ES 2272879T5 ES 03028048 T ES03028048 T ES 03028048T ES 03028048 T ES03028048 T ES 03028048T ES 2272879 T5 ES2272879 T5 ES 2272879T5
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- heating elements
- conductors
- loops
- pair
- connection means
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- Expired - Lifetime
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- 238000010438 heat treatment Methods 0.000 claims abstract description 42
- 239000004020 conductor Substances 0.000 claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000010411 cooking Methods 0.000 abstract description 6
- 239000000243 solution Substances 0.000 description 9
- 230000005672 electromagnetic field Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241001125929 Trisopterus luscus Species 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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
- 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
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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
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Geophysics And Detection Of Objects (AREA)
- General Induction Heating (AREA)
Abstract
Un dispositivo para determinar la posición de un utensilio para guisar sobre una placa calefactora que com- prende una pluralidad de elementos de calentamiento distri- buidos en un modelo de matriz por debajo de una superficie resistente al calor sobre la cual puede ser colocado el utensilio de cocina, siendo capaz cada elemento calefactor de trabajar también como un transmisor o un receptor, com- prendiendo el dispositivo bucles colocados sustancialmente alrededor de porciones de la matriz de elementos calefacto- res y que trabajan como receptores o transmisores, respec- tivamente, caracterizado porque los bucles comprenden conductores (10, 11a, 11b, 2a ..., 2l) interpuestos entre cada par de columnas o filas adyacentes de los elementos calefactores, y porque se proporcionan medios de conexión para enlazar cada bucle con un circuito (3, 9) detección.A device for determining the position of a cooking utensil on a heating plate comprising a plurality of heating elements distributed in a die pattern below a heat resistant surface on which the cooking utensil can be placed cooking, each heating element being able to work also as a transmitter or a receiver, the device comprising loops placed substantially around portions of the array of heating elements and working as receivers or transmitters, respectively, characterized in that the loops comprise conductors (10, 11a, 11b, 2a ..., 2l) interposed between each pair of adjacent columns or rows of the heating elements, and because connection means are provided to link each loop with a circuit (3, 9 ) detection.
Description
La presente invención se refiere a un dispositivo para determinar la posición de utensilios de cocina sobre una placa de cocina que comprende una pluralidad de elementos calefactores distribuidos en un modelo de matriz debajo de una superficie resistente al calor sobre la cual puede ser colocado el utensilio de cocina de una manera aleatoria, siendo cada elemento calefactor capaz de trabajar también 5 como un transmisor de campo magnético, comprendiendo el dispositivo bucles colocados sustancialmente alrededor de porciones de la matriz de elementos calefactores y de trabajar como receptores de campo magnético. The present invention relates to a device for determining the position of kitchen utensils on a kitchen plate comprising a plurality of heating elements distributed in a die model under a heat resistant surface on which the cooking utensil can be placed. cooks in a random manner, each heating element being able to also work as a magnetic field transmitter, the device comprising loops placed substantially around portions of the array of heating elements and working as magnetic field receivers.
Un dispositivo de este tipo se describe en el documento EP-A-1206164. En particular, la presente invención se refiere a una mejora de las antenas o bucles de las bobinas de recepción usados para captar 10 el campo electromagnético generado por los elementos de calentamiento. Such a device is described in EP-A-1206164. In particular, the present invention relates to an improvement of the antennas or loops of the receiving coils used to capture the electromagnetic field generated by the heating elements.
La invención se refiere también a algunas mejoras y técnicas de reducción de gastos del sistema de detección de sartenes para placas de cocinar con elementos calefactores distribuidos discretos como se describe en el documento EP-A-1303168. The invention also relates to some improvements and cost reduction techniques of the pan detection system for cooking plates with discrete distributed heating elements as described in EP-A-1303168.
La forma básica de dichas bobinas o bucles de captación de recepción, como se describe en el 15 documento EP-A-1206164, es la de una o mas bobinas hechas de hilos de metal conductores o similares que se extienden entre la placa cerámica vidriada y los elementos calefactores. Esta ejecución básica, incluso si funciona de una manera satisfactoria, tiene a pesar de ello algunos problemas prácticos y tecnológicos que se solucionan en esta invención. En particular la solución conocida básica presenta los problemas siguientes: 20 The basic form of said receiving pickup coils or loops, as described in EP-A-1206164, is that of one or more coils made of conductive metal wires or the like that extend between the glazed ceramic plate and the heating elements. This basic execution, even if it works in a satisfactory manner, nevertheless has some practical and technological problems that are solved in this invention. In particular, the basic known solution has the following problems:
- los bucles de captación son de muy difícil ejecución con más de una vuelta debido a las limitaciones de espacio y temperatura; - the feedback loops are very difficult to execute with more than one turn due to space and temperature limitations;
- para garantizar buena exactitud espacial, los bucles de captación no pueden ser demasiado grandes en comparación con el tamaño de los elementos calefactores, esto significa que el número de bucles prácticamente necesarios están en el margen de 1 cada 10 celdas; 25 - to ensure good spatial accuracy, the pickup loops cannot be too large compared to the size of the heating elements, this means that the number of practically necessary loops is in the range of 1 every 10 cells; 25
- la ejecución de los bucles de captación como se describe en EP-A-1206164 eleva los problemas de coste y de interferencia mecánica mutua entre los bucles de captación. - The execution of the feedback loops as described in EP-A-1206164 raises the problems of cost and mutual mechanical interference between the feedback loops.
Una posible disposición de los bucles de captación como se describe en EP-A-1206164 podría ser similar a la descrita en la figura 1 adjunta. En este ejemplo se proporciona una placa de cocinar hecha a partir de una matriz de 72 celdas dispuestas en 8 filas y 9 columnas con 3 bucles de captación, 30 capturando cada uno el campo electromagnético emitido por las celdas de las 3 columnas que rodea. Dicha solución tiene los siguientes inconvenientes: A possible arrangement of the pickup loops as described in EP-A-1206164 could be similar to that described in the attached figure 1. This example provides a cooking plate made from a matrix of 72 cells arranged in 8 rows and 9 columns with 3 pickup loops, each capturing the electromagnetic field emitted by the cells of the 3 surrounding columns. This solution has the following disadvantages:
- la conexión del receptor electrónico requiere dos guías y dos conductores para recibir la bobina, - the connection of the electronic receiver requires two guides and two conductors to receive the coil,
- los bucles vecinos deben tener juego mecánico entre sí para evitar el contacto recíproco y garantizar el aislamiento adecuado, 35 - neighboring loops must have mechanical play with each other to avoid reciprocal contact and ensure adequate insulation, 35
- la intensidad de la señal recibida es significativamente diferente entre las celdas cercanas al bucle de la bobina (columnas 1ª y 3ª de cada grupo de columnas) y aquellas alejadas de estas (2ª columna) Esto requiere algunos medios de compensación de la amplitud. - the intensity of the received signal is significantly different between the cells near the coil loop (1st and 3rd columns of each group of columns) and those away from them (2nd column) This requires some means of amplitude compensation.
En adición a los citados inconvenientes, el solicitante ha observado que la resolución espacial del sistema, es decir, la capacidad de detectar solamente objetos metálicos que se extienden justamente 40 sobre el elemento calefactor y no sobre sus alrededores, es mala si los bucles de captación son significativamente mayores que las bobinas de emisión que son también los elementos calefactores. In addition to the aforementioned inconveniences, the applicant has observed that the spatial resolution of the system, that is, the ability to detect only metallic objects that extend just 40 on the heating element and not on its surroundings, is bad if the feedback loops they are significantly larger than the emission coils that are also the heating elements.
La presente invención resuelve todos los problemas anteriores, proporcionando una solución que es económica, de producción fácil, robusta y garantiza características de detección altas y fiables. Un objeto de la presente invención es superar o minimizar el problema asociado con los bucles de captación 45 convencionales, proporcionando una solución más económica, más fiable y que se comporte mejor. The present invention solves all the above problems, providing a solution that is economical, easy to produce, robust and guarantees high and reliable detection characteristics. An object of the present invention is to overcome or minimize the problem associated with conventional pickup loops 45, providing a more economical, more reliable and better-behaved solution.
Para superar el problema de una mala resolución espacial fueron realizadas diversas actividades de investigación por el solicitante. Este último ha hallado que el uso de bobinas de captación del tamaño de una columna de elementos calefactores (o una fila) incrementa grandemente la resolución espacial (o enfoque). Desafortunadamente, la realización física de un cierto número de una bobina por 50 cada fila o columna de elementos calefactores es difícilmente factible debido al problema mecánico de instalar ese alto número de conductores metálicos o pistas conductoras que se extiendan paralelos entre sí, aislados unos de otros y sometidos a temperaturas de hasta 1.000º C. To overcome the problem of poor spatial resolution, various research activities were carried out by the applicant. The latter has found that the use of pickup coils the size of a column of heating elements (or a row) greatly increases the spatial resolution (or focus). Unfortunately, the physical realization of a certain number of one coil per 50 row or column of heating elements is hardly feasible due to the mechanical problem of installing that high number of metal conductors or conductive tracks that extend parallel to each other, isolated from each other. and subjected to temperatures up to 1,000º C.
La solución según la invención resuelve todos estos problemas usando un conductor (es decir, un hilo, pista o similar) interpuesto entre cada par de filas o columnas adyacentes de la matriz de elementos calefactores, siendo proporcionados medios de conexión para enlazar cada bucle con un circuito de detección. The solution according to the invention solves all these problems using a conductor (i.e., a wire, track or the like) interposed between each pair of adjacent rows or columns of the array of heating elements, connection means being provided to link each loop with a detection circuit
Un sistema de detección de pucheros según la invención está basado en el principio de la 5 inducción cruzada (o principio de transformador), en el que cada conductor de recepción es sustancialmente diferente de una bobina o bucle, pero puede asumir la función de una bobina estableciendo, por ejemplo, por medio de multiplexores electrónicos, una trayectoria conductora que sustancialmente rodee el campo magnético generado por la bobina de emisión del elemento calefactor. A pout detection system according to the invention is based on the principle of cross induction (or transformer principle), in which each receiving conductor is substantially different from a coil or loop, but can assume the function of a coil establishing, for example, by means of electronic multiplexers, a conductive path that substantially surrounds the magnetic field generated by the emission coil of the heating element.
Más de un bucle de recepción se usa preferiblemente para detectar una tensión inducida 10 magnéticamente, estando conectadas dichas bobinas entre sí en uno o más puntos y compartiendo uno o más conductores lineales. More than one reception loop is preferably used to detect a magnetically induced voltage, said coils being connected to each other at one or more points and sharing one or more linear conductors.
Según otra realización de la presente invención, en la que se usa un único circuito de amplificación y detección, se proporciona un circuito de multiplexión electrónica que puede ser usado para detectar en distintos momentos las tensiones desarrolladas mediante inducción magnética en dos de al 15 menos tres puntos de un material eléctricamente conductor, siendo estos dos puntos sustancialmente equivalentes a los terminales de una bobina de una sola vuelta que encierre el campo magnético generado por la bobina de emisión que ha de ser detectada. According to another embodiment of the present invention, in which a single amplification and detection circuit is used, an electronic multiplexing circuit is provided that can be used to detect at different times the voltages developed by magnetic induction in two of at least three points of an electrically conductive material, these two points being substantially equivalent to the terminals of a single-turn coil that encloses the magnetic field generated by the emission coil to be detected.
Según una realización más, en la que el cuerpo de detección eléctricamente conductor tiene la forma de un peine que tiene tres o más pies, la tensión diferencial desarrollada en los extremos libres de 20 cada par de pies es sustancialmente equivalente a la tensión diferencial que se desarrollaría en los extremos de una bobina que abrazase la misma área delimitada por los dos pies citados y el conductor común. According to a further embodiment, in which the electrically conductive sensing body is in the form of a comb having three or more feet, the differential tension developed at the free ends of each pair of feet is substantially equivalent to the differential tension that is it would develop at the ends of a coil that would embrace the same area bounded by the two cited feet and the common conductor.
La conexión de cada bucle al circuito de detección puede ser realizada por medio de una técnica de multiplexión electrónica para realizar trayectorias de conducción equivalentes de bucles, empezando 25 por trayectorias conductores no configuradas en forma de bobina, de una manera que se explicará en la descripción detallada siguiente, dada a modo de ejemplo no limitativo, e ilustrada en los dibujos que se acompañan, en los cuales: The connection of each loop to the detection circuit can be carried out by means of an electronic multiplexing technique to perform equivalent driving paths of loops, starting with 25 conductor paths not configured in the form of a coil, in a way that will be explained in the description. detailed following, given by way of non-limiting example, and illustrated in the accompanying drawings, in which:
- la figura 1 es una vista esquemática de un sistema de detección conocido con bucles de captación discretos; 30 - Figure 1 is a schematic view of a known detection system with discrete feedback loops; 30
- la figura 2 es una vista esquemática, similar a la figura 1, en la que se muestra una primera realización de la presente invención; - Figure 2 is a schematic view, similar to Figure 1, in which a first embodiment of the present invention is shown;
- la figura 3 es un detalle de una segunda realización de la presente invención, en la que se usa una pluralidad de receptores diferenciales; - Figure 3 is a detail of a second embodiment of the present invention, in which a plurality of differential receivers are used;
- la figura 4 es una vista esquemática, similar a la figura 1, en la que se muestra una tercera 35 realización de la presente invención, en la que se usa un par de multiplexores; - Figure 4 is a schematic view, similar to Figure 1, in which a third embodiment of the present invention is shown, in which a pair of multiplexers is used;
- la figura 5 es una vista esquemática, similar a la figura 4, en la que se muestra una cuarta realización de la presente invención. - Figure 5 is a schematic view, similar to Figure 4, in which a fourth embodiment of the present invention is shown.
Con referencia a la figura 2, una primera realización de la invención es efectuada creando un bucle o bobina de captación de una vuelta única sobre cada columna de elementos calefactores que 40 comparte un "pie" 10 común entre dos columnas adyacentes, estando conectado el pie común a la referencia 5 de toma de tierra del circuito 3 de detección. Dicha disposición tiene la ventaja de que el número de conductores verticales se reduce de 2n a 1,5n, siendo n el número de bucles que ha de ser detectado. With reference to Figure 2, a first embodiment of the invention is carried out by creating a loop or pick-up coil of a single turn on each column of heating elements 40 sharing a common "foot" 10 between two adjacent columns, the foot being connected common to the grounding reference 5 of the detection circuit 3. Said arrangement has the advantage that the number of vertical conductors is reduced from 2n to 1.5n, where n is the number of loops to be detected.
Como un experto en la técnica puede comprender fácilmente, una solución sustancialmente 45 equivalente a la presentada en la figura 2 podría ser puesta en práctica como se muestra en la figura 3, conectando el pie 10 común a una entrada de dos receptores 3' diferenciales adyacentes y el pie izquierdo 11a y el derecho 11b (entre los cuales se interpone el pie común 10) a las otras entradas de dichos receptores adyacentes. Para garantizar una lectura correcta de la presencia del puchero, deben ser proporcionados medios apropiados (como se describen en EP-A-1206164) para evitar la inyección 50 simultánea de campo electromagnético dentro de dos bucles que compartan el mismo pie común 10. As one skilled in the art can easily understand, a solution substantially equivalent to that presented in Figure 2 could be implemented as shown in Figure 3, connecting the common foot 10 to an inlet of two adjacent differential 3 'receivers and the left foot 11a and the right foot 11b (between which the common foot 10 is interposed) to the other entrances of said adjacent receivers. To ensure a correct reading of the presence of the pot, appropriate means (as described in EP-A-1206164) must be provided to prevent simultaneous injection of electromagnetic field into two loops that share the same common foot 10.
Una tercera realización de la presente invención puede reducir además el número de conductores verticales necesarios para ejecutar n bucles de detección de 1,5n a n+1. Tal realización se muestra en la figura 4, en la que el concepto de pie compartido se extiende a todos los pies a excepción A third embodiment of the present invention can further reduce the number of vertical conductors necessary to execute n detection loops from 1.5n to n + 1. Such an embodiment is shown in Figure 4, in which the concept of shared foot extends to all feet except
de los exteriores. Haciendo referencia a la figura 4, los bucles de recepción se efectúan mediante medios de multiplexión electrónica de los pies sobre una estructura conductora en forma de peine que sustituye a las bobinas regulares de las soluciones anteriores. Dicha estructura en forma de peine se compone de un borde común 12, y un número de pies 2a,...,2l que se extienden sustancialmente paralelos a las filas o las columnas de elementos calefactores para que sean detectados por la presencia de la olla. 5 of the exteriors. Referring to Figure 4, the reception loops are made by means of electronic multiplexing of the feet on a comb-shaped conductive structure that replaces the regular coils of the previous solutions. Said comb-shaped structure is composed of a common edge 12, and a number of feet 2a, ..., 2l that extend substantially parallel to the rows or columns of heating elements so that they are detected by the presence of the pot . 5
Para comprender como funciona esta solución, suponemos que, para detectar la presencia de la olla, se usa el elemento calefactor 6. Como se describe en la técnica anterior, una corriente alterna circula por la bobina del elemento calefactor 6, generando por tanto un campo magnético que se extiende desde la celda como un surtidor. Al mismo tiempo, los dos multiplexores 7a y 7b electrónicos son atendidos por un control electrónico adecuado, para conmutar en el amplificador diferencial 8 los dos pies 2h y 2i de 10 peine adyacentes a la celda 6. Esto es eléctricamente equivalente a tener un bucle real enrollado alrededor de la columna dentro de la cual se extiende la celda 6. Para reducir las perturbaciones de modo comunes y el acoplamiento capacitivo, es conveniente conectar el lado común de los pies de peine a la toma de tierra, como se muestra en 5, de esta manera la tensión a través de los dos pies considerados será casi exclusivamente diferencial. Una solución sustancialmente equivalente se muestra en la figura 5, 15 en la que la estructura de peine está flotando eléctricamente y es conectada a la toma de tierra 5 por medio del multiplexor 7b' electrónico, mientras el otro multiplexor 7a' conecta el otro pie a un amplificador 8' referenciado de toma de tierra conectado al circuito 9 de detección. To understand how this solution works, we assume that, to detect the presence of the pot, the heating element 6 is used. As described in the prior art, an alternating current circulates through the coil of the heating element 6, thereby generating a field magnetic that extends from the cell as a supplier. At the same time, the two electronic multiplexers 7a and 7b are serviced by a suitable electronic control, to switch on the differential amplifier 8 the two feet 2h and 2i of 10 comb adjacent to cell 6. This is electrically equivalent to having a real loop. wrapped around the column into which cell 6 extends. To reduce common mode disturbances and capacitive coupling, it is convenient to connect the common side of the comb feet to the ground, as shown in 5, in this way the tension across the two feet considered will be almost exclusively differential. A substantially equivalent solution is shown in Figure 5, 15 in which the comb structure is electrically floating and is connected to the ground 5 by means of the electronic multiplexer 7b ', while the other multiplexer 7a' connects the other foot to a referenced 8 'grounding amplifier connected to the detection circuit 9.
Claims (5)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP03028048A EP1542508B2 (en) | 2003-12-08 | 2003-12-08 | A device for determining the location of cooking utensils on a cooking hob |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| ES2272879T3 ES2272879T3 (en) | 2007-05-01 |
| ES2272879T5 true ES2272879T5 (en) | 2011-03-18 |
Family
ID=34486126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES03028048T Expired - Lifetime ES2272879T5 (en) | 2003-12-08 | 2003-12-08 | A DEVICE FOR DETERMINING THE POSITION OF KITCHEN UTENSILS ON A KITCHEN PLATE. |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1542508B2 (en) |
| DE (1) | DE60308704T2 (en) |
| ES (1) | ES2272879T5 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SG163536A1 (en) | 2005-06-29 | 2010-08-30 | Watlow Electric Mfg | Smart layered heater surfaces |
| DE102009020628A1 (en) | 2009-05-09 | 2010-11-11 | Hettich Holding Gmbh & Co. Ohg | Hob and method for heating cooking vessels set up on the hob |
| ES2382431B1 (en) * | 2009-07-29 | 2013-05-08 | BSH Electrodomésticos España S.A. | COOKING DEVICE WITH AT LEAST TWO HEATING AREAS |
| CN102609017B (en) * | 2012-03-01 | 2014-06-11 | 大连理工大学 | Heating device and method capable of producing controllable temperature gradient field on metal wing structure |
| TR201602883A2 (en) | 2016-03-04 | 2017-09-21 | Arcelik As | FURNACE POWER CONTROL CIRCUIT WITH INDUCTION HEATER |
| ES2673130B1 (en) * | 2016-12-19 | 2019-03-28 | Bsh Electrodomesticos Espana Sa | DOMESTIC COOKING DEVICE FOR INDUCTION WITH A MATRIX OF HEATING ELEMENTS |
| TR201721881A2 (en) | 2017-12-26 | 2019-07-22 | Arcelik As | A METAL DETECTION SYSTEM WITH COIL FEEDING WITH A HIGH FREQUENCY GENERATOR |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2509562A1 (en) † | 1981-07-10 | 1983-01-14 | Cem Comp Electro Mec | METHOD AND APPARATUS FOR HOMOGENEOUS HEATING BY TRANSVERSE FLOW ELECTROMAGNETIC INDUCTION OF FLAT, CONDUCTOR AND AMAGNETIC PRODUCTS |
| DE3327622A1 (en) † | 1983-07-30 | 1985-02-07 | Blanc Gmbh & Co, 7519 Oberderdingen | Electrical hotplate for a glass-ceramic cooking plate |
| JPS618615A (en) † | 1984-06-23 | 1986-01-16 | Yoshio Shimizu | Device for detecting and tracking position of substance |
| DE4007680A1 (en) * | 1990-03-10 | 1991-09-19 | Grass Ag | Glass-ceramic cooking hob - has field of sensor-driven elements each a preset different power outputs |
| WO1997019298A1 (en) * | 1995-11-21 | 1997-05-29 | Aktiebolaget Electrolux | A cooking surface with controls |
| DE19643698C2 (en) † | 1996-05-11 | 2000-04-13 | Aeg Hausgeraete Gmbh | Device for shielding conductor tracks of a hob used for capacitive measurements |
| DE10033361A1 (en) † | 2000-07-08 | 2002-01-24 | Thomas Wartmann | Matrix cooking unit has matrices of heating zones and sensor points for locating cooking vessels and measuring cooking temperatures |
| DE10048254C1 (en) † | 2000-09-29 | 2001-09-20 | Schott Glas | Pot detection system, for hotplates on ceramic hob, comprises individual conductors which run to plates from common connection and conductive layer insulated from individual conductors positioned over them in area between plates |
| IT1319292B1 (en) * | 2000-11-08 | 2003-10-10 | Whirlpool Co | DEVICE TO DETECT THE PLACEMENT OF COOKING TOOLS ON A COOKING HOB WITH DISCRETE AND DISTRIBUTED HEATING ELEMENTS. |
| US6693262B2 (en) * | 2001-10-17 | 2004-02-17 | Whirlpool Corporation | Cooking hob with discrete distributed heating elements |
-
2003
- 2003-12-08 ES ES03028048T patent/ES2272879T5/en not_active Expired - Lifetime
- 2003-12-08 DE DE2003608704 patent/DE60308704T2/en not_active Expired - Lifetime
- 2003-12-08 EP EP03028048A patent/EP1542508B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| ES2272879T3 (en) | 2007-05-01 |
| EP1542508B2 (en) | 2010-10-20 |
| EP1542508A1 (en) | 2005-06-15 |
| EP1542508B1 (en) | 2006-09-27 |
| DE60308704D1 (en) | 2006-11-09 |
| DE60308704T2 (en) | 2007-08-16 |
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