EP3920663A1 - Système et procédé permettant d'identifier des éléments de batterie cuisine placés sur une plaque de cuisson à induction - Google Patents

Système et procédé permettant d'identifier des éléments de batterie cuisine placés sur une plaque de cuisson à induction Download PDF

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Publication number
EP3920663A1
EP3920663A1 EP21177841.0A EP21177841A EP3920663A1 EP 3920663 A1 EP3920663 A1 EP 3920663A1 EP 21177841 A EP21177841 A EP 21177841A EP 3920663 A1 EP3920663 A1 EP 3920663A1
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European Patent Office
Prior art keywords
level
intercept
coils
iso
coil
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Granted
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EP21177841.0A
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German (de)
English (en)
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EP3920663B1 (fr
Inventor
Andrea GALLIVANONI
Cristiano Vito Pastore
Federica Inderst
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Whirlpool Corp
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Whirlpool Corp
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Priority claimed from US16/946,101 external-priority patent/US11596030B2/en
Priority claimed from US16/946,098 external-priority patent/US20210385913A1/en
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Publication of EP3920663A1 publication Critical patent/EP3920663A1/fr
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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
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/03—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 disclosure generally relates to a system and method for identifying cookware items placed on an induction cooktop.
  • the present invention concerns a method of identifying coil clustering to estimate at least one of a position, shape, size and orientation of one or more cookware items placed on top of an induction cooktop having a plurality of coils, preferably an induction cooktop of the flexible type.
  • the present invention also concerns an induction system specifically configured to carry out the above method.
  • ES2362839 / EP2242328 essentially propose to generate a first image whose "pixels" are representing the coverage factor in response of the overlying cookware items. Then it proposes to identify a cohesive (i.e. contiguous) area made of neighboring cells having a coverage factor larger than a predetermined threshold. Finally, it is proposed to apply a separation algorithm aimed at differentiating whether the contiguous area corresponds to one cookware item or to multiple cookware items close to each other. However the proposed method provides inaccurate results whenever the heating cell dimension is not sufficiently small compared to the size of the cookware item.
  • EP2034799 proposes to first determine a cell covered by a cookware item and then perform a selective search in a neighborhood of that cell, through a set of additional sensors.
  • the present invention is aimed at overcoming the limitations and drawbacks of the prior art thanks to the features listed in the appended set of claims.
  • the terms “upper,” “lower,” “right,” “left,” “rear,” “front,” “vertical,” “horizontal,” and derivatives thereof shall relate to the disclosure as oriented in FIG. 1 .
  • the term “front” shall refer to the surface of the element closer to an intended viewer, and the term “rear” shall refer to the surface of the element further from the intended viewer.
  • the disclosure may assume various alternative orientations, except where expressly specified to the contrary.
  • the specific devices and processes illustrated in the attached drawings, and described in the following specification are simply exemplary embodiments of the inventive concepts defined in the appended claims. Hence, specific dimensions and other physical characteristics relating to the embodiments disclosed herein are not to be considered as limiting, unless the claims expressly state otherwise.
  • FIG. 1 shows an induction cooktop 10 characterized by having a large number of coils 20 1 -20 n , whose dimensions are typically smaller than the size of a cookware item, and these coils 20 1- 20 n are distributed next to each other to form mono-dimensional or bi-dimensional arrays.
  • FIG. 2A shows actual cookware items 30 and 32 placed on top of a flexible induction cooktop 10.
  • FIG. 2B shows a single elliptical cookware item 34 that is incorrectly identified instead of two circular ones, since the two cookware items 30 and 32 are too close to each other.
  • the number inside each coil 20 1 -20 n displays the corresponding coverage factor.
  • the set of activated coils 20 1 -20 n can be confused with the one activated by a single elliptical cookware item 34.
  • the objective of the present method is to provide a method for cookware item identification and estimation able to identify individual cookware items as distinct items.
  • FIG. 3 shows a block diagram of the basic electrical components of an induction cooktop system 5.
  • a controller 100 such as a microprocessor or the like, is coupled to each of the coils 20 1- 20 n of the induction cooktop 10 and to a power supply 102 and a user interface 104.
  • the controller 100 will respond to activation of an input on the user interface 104 to detect the presence, size, shape, orientation, and position of any cookware items 30 and 32 on the induction cooktop 10 using the method described below.
  • the controller 100 will control the power supply 102 to supply an appropriate power level to the coils 20 1 -20 n underlying the cookware items 30 and 32 in order to heat food in the cookware items 30 and 32.
  • the user interface 104 may be any conventional user interface and may include various inputs such as temperature settings and timers or the like.
  • a method 200 described herein is shown in FIGS. 4 and 4A and may be implemented as an algorithm executed by the controller 100.
  • the method 200 has a preliminary step 202 in the acquisition of a matrix of coverage factors, each element of the matrix corresponding to one coil 20 1- 20 n .
  • the particular manner in which the controller 100 determines the coverage factor of each coil 20 1 -20 n is not described herein insofar as any known technique may be used.
  • the coverage factor matrix is then processed according to the described method 200 to identify the different cookware items 30 and 32.
  • the coverage factor for each coil is defined as the degree of coverage of the coil when coupled to an overlying cookware item.
  • This coverage factor for each of the coils can be derived through a pan detection system and particularly by measuring the electromagnetic coupling between the coil and the overlying cookware.
  • to each of the inductors can be assigned a value indicative of the coverage, for instance a percentage value, starting from an electrical measurable variable linked with the electromagnetic coupling of the inductor in question, with one or more of the overlying cookware items.
  • the electrical variable that can be preferably measured is the complex impedance at the leads of the coil. It is also understood that other information related to the coverage factor can be used instead, such as, but not limited to, inductance, resistance, or power factor.
  • any other variable linked with the fraction of the area of the coil that is covered by an overlying cookware item can also be used as a coverage factor.
  • collect information related to a coverage factor thus means to collect information indicative of a degree of overlap between a cookware item and coil, and preferably to measure one or more electrical variables related to the electromagnetic coupling between the overlying cookware item and the coil; In FIG. 2A and following, this fraction is expressed as a percentage.
  • the surface of the cooktop 10 is associated with a coordinate system apt to describe a 2D surface, for example, but not limited to, a Cartesian coordinate system with origin in the lower left corner of the cooktop surface, with the x axis oriented horizontally towards the right and the y axis oriented vertically towards the back.
  • a coordinate system apt to describe a 2D surface, for example, but not limited to, a Cartesian coordinate system with origin in the lower left corner of the cooktop surface, with the x axis oriented horizontally towards the right and the y axis oriented vertically towards the back.
  • This method 200 is based on the concept of iso-level curves that goes under different names in different fields.
  • “isohypses” and “contour lines” are common names in cartography and geography to denote elevation or altitude on maps; “isobars” and “isotherms” are common features of maps shown in forecasts to display atmospheric pressure and temperature.
  • iso-level curves are curves that connect all points on a plane, preferably an horizontal plane, that have the same value of the dependent variable, as a function of position.
  • the dependent variable is, respectively, altitude, atmospheric pressure, and temperature.
  • the dependent variable is the coverage factor of each coil 20 1 -20 n .
  • the method 200 presupposes that the coverage factor of the coils 20 1 -20 n have already been acquired, and therefore takes as input a matrix containing the coverage factors of each individual coil 20 1 -20 n in the induction cooktop 10 (step 202).
  • the iso-level curve calculation is akin to considering a mountainous terrain, where regions with high coverage factors correspond to the peaks, and regions with low coverage factors correspond to the valleys.
  • the graphed surface with two peaks is a 3D representation of the coverage factor, which has been reconstructed by an algorithm having as input at least a portion of the coverage factor matrix.
  • the hatched horizontal plane is used for intersecting the 3D surface at a predefined intercept level.
  • the thick black lines are the resultant intersection.
  • the algorithm makes a mathematical reconstruction of the curves, using interpolations, starting from the coverage factors levels acquired in the coverage factor matrix. Interpolation can be of any degree of approximation, linear, polynomial, spline or even not linear.
  • the algorithm determines the iso-level curves along the triangular grid that connects the center of adjacent coils 20 1 -20 n , as shown in FIG. 6 .
  • the vertices of the grid are placed at the centers of the coils 20 1- 20 n .
  • Dummy coils with zero coverage factor are added around the existing coiled grid, as shown in FIG. 7 , in order to always have closed curves for each cookware item 30 and 32, even the ones that lie near the border of the coil arrangement.
  • the actual coils 20 1 -20 n are represented by circles with black, solid borders.
  • the coil arrangement is the same as shown in FIG. 1 .
  • the additional dummy coils are represented by circles with dashed borders.
  • the iso-level curve calculation starts from either a predefined value (e.g. 100% of coverage factor, or less) or, more preferably, from the maximum value in the coverage factor matrix and is then repeated multiple times, each time decreasing the intercept level with an horizontal plane, by a predetermined amount, preferably in the range between 1 percent and 10 percent of the coverage factor, conveniently between 1 percent and 5 percent of the coverage factor and more preferably by decreasing the intercept level of the intercepting horizontal plane by 1 percent of the coverage factor.
  • the predetermined amount can be set preferably in the range between 1 and 10 percentage points, conveniently between 1 and 5 percentage points or and more preferably by decreasing the intercept level of the intercepting horizontal plane by 1 percentage point.
  • the method 200 next finds the maximum value in the coverage factor matrix in step 204, and sets the present intercept level (the level where the intersecting plane is located) at the identified maximum coverage value in step 206.
  • the method determines the iso-level curves corresponding to the present intercept level in step 208.
  • the algorithm counts how many closed curves have been identified for the present level in step 210.
  • the intercept level is then decreased by a predetermined amount in step 212.
  • step 214 the iso-level curves are determined for the decreased intercept level and the number of closed iso-level curves is then determined by counting in step 216.
  • Each closed curve corresponds to a different cookware item 30 and 32, provided the coverage factor of the coils 20 1 -20 n it overlies spans the selected intercept level.
  • An example of the obtained closed curves are shown in FIGS. 8A and 9A for two different levels as shown in FIGS. 8 and 9 . More specifically, FIGS. 8A and 9A show the iso-level curves obtained with the calculations shown in FIGS. 8 and 9 , respectively.
  • FIGS. 8 and 8A represent an example of iso-level curves for an intercept level selection that is too high compared to FIGS. 9 and 9A , where the intersecting plane in FIG. 8 is placed at a higher level, so the lower peak is not intersected.
  • the iso-level curves that were previously distinct will be merged into a single closed curve, as shown in FIGS. 10 and 10A .
  • the intersecting plane is placed at a lower level, so the two peaks are merged into a single closed curve. This means that, at that intercept level, it is no longer possible to detect two distinct, but neighboring cookware items 30 and 32 as being actually separated. Thus, the intercept level selection is too low.
  • the optimal intercept level for cookware item separation is therefore the one immediately before the one where the curves have merged.
  • step 218 ( FIG. 4A ) of the method 200 compares the number of closed curves counted in step 216 to the number of closed curves counted at the previous intercept level. If the number of closed curves is the same or higher, then in step 220, the previously saved result is discarded and updated with the decreased intercept level determined in step 212. Then, in step 222, determine if the decreased intercept level has reached a predetermined minimum threshold X . If the decreased intercept level has not reached a predetermined minimum threshold X , steps 212-222 are repeated until either the number of closed curves counted in step 216 is lower than that previously counted or the present intercept level reaches or falls below the predetermined minimum threshold X . If the number of closed curves is determined to be lower in step 218, the method 200 keeps the previously saved result, which represents the optimum intercept level.
  • the present level is set to the top of the highest peak and then repeatedly decreased to initially identify one closed curve as shown in FIG. 8A .
  • the intercept level is further decreased until two curves are counted ( FIG. 9A ).
  • the last intercept level is saved as the saved result (step 220).
  • the intercept level is decreased even further and eventually the number of counted closed curves falls back to one ( FIG. 10A ).
  • a determination is made in step 218 that the count is lower and the previous intercept level is kept as the saved result as this is the optimum intercept level.
  • FIG. 11 A family of curves, corresponding to different intercept levels, is shown in FIG. 11 .
  • the thicker line indicates the lowest level for which there are two closed curves instead of one.
  • FIG. 12 shows the corresponding number of closed curves, for each intercept level. The number of closed curves starts from 1 at level 100, since only the taller peak is detected; increases to 2 at level 92, indicating that both peaks are detected; and goes back to 1 at level 60, since the two peaks are now merged. Looking at this plot, the optimal level selection is the one immediately to the left of the decrease, in this case 61.
  • the algorithm proceeds to determine, for each closed curve, which of the coils 20 1 -20 n are inside the curve in step 226.
  • One possible criteria to determine whether each coil is inside a closed curve or not, is to check whether the center of said coil is inside the curve.
  • Another criteria is to measure the area of intersection of the closed curve and said coil, and check whether said area is greater than a predetermined threshold.
  • Said threshold can preferably, be set in the range between 30% and 60% of the area of the individual coil, more preferably about 50% of the area of the individual coil.
  • Each coil cluster 40 and 42 corresponds to one of the cookware items 30 and 32 placed on the induction cooktop 10, indicated by the thick-bordered circles.
  • Each cluster of coil clusters 40 and 42 is used to identify the cookware items 30 and 32; in particular, it is used to estimate the center position, the shape, the size, and the orientation in step 228.
  • centroid coordinates determined here are used as the estimation for the center position of the corresponding cookware item, as shown in FIG. 14 .
  • a cluster is the area estimation for the cluster
  • N is the number of coils belonging to the cluster
  • K is an adjusting factor
  • a coil is the area of the i th coil
  • c i is the coverage factor for the i th coil.
  • Another possible way to estimate the size of each cookware item is first determine the second moments of area and the product of inertia.
  • One possible way of performing this calculation is to consider cartesian axes, passing through the center of the cookware item, and parallel to the axes of the reference coordinate system defined in ⁇ 0045.
  • I xx is the second moment of area relative to the x -axis
  • I yy is the second moment of area relative to the y -axis
  • I xy is equivalent to the product of inertia
  • I xcoil is the second moment of area for the coils shape relative to the x-axis
  • I ycoil is the second moment of area for the coil shape relative to the y -axis
  • I xycoil is the equivalent to the product of iner
  • I I and I II are the principal moments
  • ⁇ is the rotation angle of the cookware item relative to the axes of the reference coordinate system.
  • a typical method to estimate the shape is to consider the ratio between the two semiaxes a and b just calculated: if the two values of a and b are the same, the ratio is 1 and the shape is circular; if they are different, the ratio is other than 1 and the shape is elliptical. Due to the uncertainty in the estimation and calculation of the values of the major and minor semiaxes, it is typical to compare the ratio a / b with a predefined threshold, and if the ratio is larger than this threshold consider the shape as elliptical, whereas if the ratio is smaller than this threshold the shape is considered as circular.
  • FIG. 15 finally shows the coil clusters with the corresponding estimated cookware items.
  • FIG. 16 shows four pots placed on the cooktop, in particular two of the pots are actually touching each other.
  • FIG. 17 shows the different families of iso-level curves, obtained by the intersection of the 3D coverage factor curve with a plane at various levels.
  • FIG. 18 shows the number of closed curves versul level value, for the families of curves shown in FIG. 17 .
  • the first level value for which there is a decrease in the number of closed curves is 80, so the correct level value to consider for the continuation of the method is 81.
  • FIGS. 19 and 19A show the 3D surface derived from the coverage factor, and the corresponding isolevel curves obtained by setting the level 81.
  • FIG. 20 finally shows the coil clusters, as determined in FIGS. 19 and 19A , with the corresponding estimated cookware items.
  • the system can use this information to display a visual representation of the cookware items on the User Interface 104.
  • the user can then select a first power level input for at least one of the identified cookware items, said first power level input being set by a user through a user interface 104, or any other means.
  • the system will then assign a second power level to each coil belonging to a cluster derived from the first power level input received from the user, said second power level being determined and set by the controller; this second power level can be set in many different ways.
  • a non-limiting example is to divide the first power level equally among all the coils belonging to the cluster, for example if the first power level is 1200 W and the cluster is composed of 6 coils, the second power level for each coil would be 200 W.
  • Another non-limiting example would be to determine the second power level proportionally to the coverage factor. Other criteria are easily determinable by people skilled in the art.
  • the system will control the power delivery to the coils belonging to the identified coil cluster corresponding to the selected cookware item, in order to deliver the first power level requested by the user to the selected cookware item.
  • clustering of coils allows to discriminate between adjacent cookware items directly, with no need to further process an area previously identified, as in the prior art.
  • a method of identifying cookware items placed on top of an induction cooktop having a plurality of coils includes the following steps: (a) acquire coverage factor information for each coil, and collect it into a coverage factor matrix; (b) set a present intercept level at a predetermined starting value; (c) determine iso-level curves corresponding to the present intercept level; (d) count the number of closed iso-level curves determined in step (c) and save the result; (e) decrease the intercept level by a predetermined amount; (f) determine iso-level curves corresponding to the decreased intercept level; (g) count the number of closed iso-level curves determined in step (f); (h) compare the number of closed curves at the present intercept level with the number of closed curves from the previous intercept level; (i) if the number of closed curves at the present intercept level is the same as or higher than the number of closed curves from the previous intercept level, discard the previously saved result and update with the present intercept level; (j)
  • step (c) includes calculating a 3D representation of the coverage factor matrix.
  • step (c) further includes selecting an intersecting plane at the present intercept level and forming iso-level curves from the points of intersection of the 3D representation and the intersecting plane.
  • the intersecting plane is a horizontal plane.
  • the method further includes the step of (n) supplying power to the coils underlying the cookware items.
  • dummy coils are generated about the periphery of the actual coils, wherein the dummy coils have a coverage factor of zero.
  • the predetermined starting value is a maximum value in the coverage factor matrix.
  • step (l) of which coils are inside the curve is based on whether the center of said coil is inside the curve.
  • step (l) of which coils are inside the curve is based on whether the area of intersection of the closed curve and said coil is greater than a predetermined threshold.
  • an induction cooktop system includes: an induction cooktop including a plurality of induction coils; a power supply for supplying power to selected ones of the plurality of induction coils; and a controller for identifying cookware items placed on top of the induction cooktop, estimating the position, shape, size, and orientation of the cookware items, and controlling the amount of power supplied to the selected ones of the plurality of induction coils, the controller being programmed to perform at least the following steps: (a) acquire coverage factor information for each coil, and collect it into a coverage factor matrix; (b) set a present intercept level at the identified maximum value; (c) determine iso-level curves corresponding to the present intercept level; (d) count the number of closed iso-level curves determined in step (c) and save the result; (e) decrease the present intercept level by a predetermined amount; (f) determine iso-level curves corresponding to the decreased intercept level; (g) count the number of closed iso-level curves determined in
  • step (c) includes calculating a 3D representation of the coverage factor matrix.
  • step (c) further includes selecting an intersecting plane at the present intercept level and forming iso-level curves from the points of intersection of the 3D representation and the intersecting plane.
  • the intersecting plane is a horizontal plane.
  • the system further includes the step of (n) supplying power to the coils underlying the cookware items.
  • dummy coils are generated about the periphery of the actual coils, wherein the dummy coils have a coverage factor of zero.
  • the predetermined starting value is a maximum value in the coverage factor matrix.
  • the system further includes a user interface coupled to the controller for providing user input to the controller.
  • step (l) of which coils are inside the curve is based on whether the center of said coil is inside the curve.
  • step (l) of which coils are inside the curve is based on whether the area of intersection of the closed curve and said coil is greater than a predetermined threshold.
  • a method of identifying cookware items placed on top of an induction cooktop having a plurality of coils includes the following steps: (a) acquire coverage factor information for each coil, and collect it into a coverage factor matrix; (b) set a present intercept level at a maximum value identified in the input coverage factor matrix; (c) identify and count closed iso-level curves corresponding to the present intercept level and save the result; (d) decrease the present intercept level by a predetermined amount; (e) identify and count closed iso-level curves corresponding to the decreased intercept level; (f) when the number of closed curves at the present intercept level is the same as or higher than the number of closed curves from the previous intercept level, discard the previously saved result and update with the present level; (g) when the number of closed curves at the present intercept level is lower than the number of closed curves from the previous intercept level, keep the previously saved result and skip to step (i); (h) repeat steps (d) to (h), until the number decreases or the decreased
  • step (c) includes calculating a 3D representation of the coverage factor matrix.
  • step (c) further includes selecting an intersecting plane at the present intercept level and forming iso-level curves from the points of intersection of the 3D representation and the intersecting plane.
  • the intersecting plane is a horizontal plane.
  • step (i) of which coils are inside the curve is based on whether the center of said coil is inside the curve.
  • the determination in step (i) of which coils are inside the curve is based on whether the area of intersection of the closed curve and said coil is greater than a predetermined threshold.
  • the term "coupled” in all of its forms, couple, coupling, coupled, etc. generally means the joining of two components (electrical or mechanical) directly or indirectly to one another. Such joining may be stationary in nature or movable in nature. Such joining may be achieved with the two components (electrical or mechanical) and any additional intermediate members being integrally formed as a single unitary body with one another or with the two components. Such joining may be permanent in nature or may be removable or releasable in nature unless otherwise stated.
  • elements shown as integrally formed may be constructed of multiple parts or elements shown as multiple parts may be integrally formed, the operation of the interfaces may be reversed or otherwise varied, the length or width of the structures and/or members or connector or other elements of the system may be varied, the nature or number of adjustment positions provided between the elements may be varied.
  • the elements and/or assemblies of the system may be constructed from any of a wide variety of materials that provide sufficient strength or durability, in any of a wide variety of colors, textures, and combinations. Accordingly, all such modifications are intended to be included within the scope of the present innovations. Other substitutions, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the desired and other exemplary embodiments without departing from the spirit of the present innovations.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Induction Heating Cooking Devices (AREA)
  • Cookers (AREA)
EP21177841.0A 2020-06-05 2021-06-04 Système et procédé permettant d'identifier des éléments de batterie cuisine placés sur une plaque de cuisson à induction Active EP3920663B1 (fr)

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Application Number Priority Date Filing Date Title
US16/946,101 US11596030B2 (en) 2020-06-05 2020-06-05 System and method for identifying cookware items placed on an induction cooktop
US16/946,098 US20210385913A1 (en) 2020-06-05 2020-06-05 System and method for identifying cookware items placed on an induction cooktop

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EP3920663A1 true EP3920663A1 (fr) 2021-12-08
EP3920663B1 EP3920663B1 (fr) 2022-12-28

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EP21177817.0A Pending EP3920662A1 (fr) 2020-06-05 2021-06-04 Système et procédé d'identification d'éléments de cuisine placés sur une plaque de cuisson à induction

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2034799A1 (fr) 2007-08-07 2009-03-11 BSH Bosch und Siemens Hausgeräte GmbH Champ de cuisson doté d'un dispositif de capteur et procédé de détection de vaisselle de cuisson sur un champ de cuisson
EP2242328A2 (fr) 2009-04-17 2010-10-20 BSH Bosch und Siemens Hausgeräte GmbH Procédé de détection d'éléments de vaisselle de cuisson sur un champ de cuisson à matrice
EP3307018B1 (fr) * 2016-10-10 2019-03-27 E.G.O. ELEKTRO-GERÄTEBAU GmbH Procédé de commande d'une plaque de cuisson à induction et plaque de cuisson à induction

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2863039B1 (fr) 2003-11-27 2006-02-17 Brandt Ind Procede de chauffage d'un recipient pose sur une table de cuisson a moyens de chauffage associe a des inducteurs
ES2363666B1 (es) * 2009-04-14 2012-09-04 Bsh Electrodomesticos España, S.A. Campo de coccion y procedimiento para accionar un campo de coccion

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2034799A1 (fr) 2007-08-07 2009-03-11 BSH Bosch und Siemens Hausgeräte GmbH Champ de cuisson doté d'un dispositif de capteur et procédé de détection de vaisselle de cuisson sur un champ de cuisson
EP2242328A2 (fr) 2009-04-17 2010-10-20 BSH Bosch und Siemens Hausgeräte GmbH Procédé de détection d'éléments de vaisselle de cuisson sur un champ de cuisson à matrice
EP3307018B1 (fr) * 2016-10-10 2019-03-27 E.G.O. ELEKTRO-GERÄTEBAU GmbH Procédé de commande d'une plaque de cuisson à induction et plaque de cuisson à induction

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