EP3445134B1 - Kochgerät und verfahren zur steuerung eines kochgeräts - Google Patents

Kochgerät und verfahren zur steuerung eines kochgeräts Download PDF

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Publication number
EP3445134B1
EP3445134B1 EP17187261.7A EP17187261A EP3445134B1 EP 3445134 B1 EP3445134 B1 EP 3445134B1 EP 17187261 A EP17187261 A EP 17187261A EP 3445134 B1 EP3445134 B1 EP 3445134B1
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EP
European Patent Office
Prior art keywords
cooking
zones
cookware
zone
cooking zones
Prior art date
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Active
Application number
EP17187261.7A
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English (en)
French (fr)
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EP3445134A1 (de
Inventor
Claus Meider
Gerhard Klein
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Electrolux Appliances AB
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Electrolux Appliances AB
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Publication of EP3445134A1 publication Critical patent/EP3445134A1/de
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Publication of EP3445134B1 publication Critical patent/EP3445134B1/de
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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
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227—Applications
    • H05B1/0252—Domestic applications
    • H05B1/0258—For cooking
    • H05B1/0261—For cooking of food
    • H05B1/0266—Cooktops
    • 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
    • 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 appliance, particularly a cooking hob, more particularly an induction hob, which comprises a plurality of cooking zones, means for detecting whether cookware is present in the cooking zones, and a user interface for setting a power level for each of the cooking zones and for selecting whether at least two cooking zones are operated independently or as a combined cooking zone.
  • a cooking appliance is shown in WO 2008/122495 A1 , which discloses an induction hob having a plurality of induction coils that are located below a glass ceramic plate. Based on a detection of cookware placed on the induction coils, a plurality of induction coils can be operated as a combined cooking zone.
  • EP 2 688 365 Another such cooking appliance is shown in EP 2 688 365 .
  • EP 2 840 867 A1 A further such cooking appliance is shown in EP 2 840 867 A1 , wherein in case that cookware is detected to be present in adjacent cooking zones, these cooking zones automatically are operated as a combined cooking zone.
  • the strategy of operating a cooking appliance suggested in EP 2 840 867 A1 is disadvantageous.
  • a first cookware item such as a pot or a casserole
  • such adjacent cooking zone will automatically be heated to the same power level as that used for heating the first cookware item.
  • the user has to reset the entire hob and has to set anew the power levels for all cooking zones to be used.
  • the present invention is directed to a cooking appliance, particularly a cooking hob, more particularly an induction hob, which comprises a plurality of cooking zones, means for detecting whether cookware is present in the cooking zones, and at least one user interface for setting a power level for each of the cooking zones and for selecting whether at least two cooking zones are operated independently or as a combined cooking zone.
  • the cooking appliance is configured to detect upon power-up of the cooking appliance whether cookware is present in the cooking zones, and if it is detected that cookware is present in at least two adjacent cooking zones, the user interface presents input means for individually selecting a power level for each of the adjacent cooking zones, and further presents input means for selecting a bridging mode for operating adjacent cooking zones as a combined cooking zone.
  • the term "cooking zone” designates a zone to which heat can be applied, which zone can be formed by a single heating element, such as a single induction coil, or which is formed by two or more heating elements, which can be operated simultaneously, but which also may be operated individually so as to adapt the size and shape of the cooking zone to the size and shape of a cookware item to be heated in such cooking zone.
  • heating zone preferably refers to a zone to which heat can be applied, which zone can be formed by a single heating element, such as a single induction coil, or which is formed by two or more heating elements, which are operatively connected to be operated with the same heating power density, so as to adapt the size and shape of the cooking zone to the size and shape of a cookware item to be heated in such cooking zone.
  • the user interface presents input means for individually selecting a power level for each of the adjacent cooking zones A, B and C, but further will present input means for selecting a bridging mode for operating either adjacent zones A and B in bridging mode, or for operating adjacent zones B and C in bridging mode, or for operating all three adjacent zones A, B and C in bridging mode.
  • the user interface may present input means for selecting a bridging mode of all four adjacent cooking zones A, B, C and D, of adjacent zones A, B and C, of adjacent zones B, C and D, of adjacent zones A and B, of adjacent zones B and C, of adjacent zones C and D, or finally for providing two simultaneous bridging modes in which zones A and B are operated as a first combined zone and zones C and D are operated as a second combined zone.
  • a detection is made of cookware items that are placed on the cooking zones. If in such detection it is determined that cookware is present in at least two adjacent cooking zones, as a default selection the respective cooking zones are presented as cooking zones that are to be operated individually, wherein however an additional input means is presented by which a bridging mode can be selected to operate any or all of the adjacent cooking zones as a combined cooking zone.
  • the cooking appliance automatically detects in which of the cooking zones cookware is present and thus presents respective input means for individually selecting a power level for each of the adjacent cooking zones, this can be easily effected by making a respective selection at the input means by which a bridging mode can be selected.
  • the user thus has to manually confirm that such combined operation of adjacent cooking zones is intended. If the bridging mode is selected, the selected two or more cooking zones then are dealt with as one larger single zone, so that all the cooking zones that constitute the combined zone are operated using a single set of operating parameters, i.e. are operated at the same power level and, should optional timer functions be set, with the same timer functions.
  • the cooking appliance is configured to operate the user interface such that upon selection of a bridging mode of adjacent cooking zones, the input means for individually selecting a power level for each of the adjacent cooking zones that now are operated in bridging mode are hidden, and input means for selecting a power level of the combined cooking zone is presented.
  • the bridging mode of operation of adjacent cooking zones also is reflected in the choice of input elements offered by the user interface, which provides for a clear and user friendly presentation of the respective input elements.
  • the cooking appliance further can be configured to operate the user interface such that upon selection of a bridging mode of adjacent cooking zones, the input means for selecting a bridging mode is hidden for those cooking zones for which a bridging mode has been selected.
  • the user interface preferably is adapted to only offer options that can be selected by the user, whereas presently unavailable options are hidden, which further improves the practicability of the appliance by providing for a clear and self-explaining choice of input elements and displays.
  • the above object further is solved by a cooking appliance as it is defined in claim 4, wherein the cooking appliance is configured to detect during operation of the cooking appliance when cookware is placed onto at least two adjacent cooking zones, wherein based on the temporal relationship of the placement of cookware onto adjacent cooking zones a decision is made whether the cooking zones are to be operated individually or are to be operated in a bridging mode as a combined cooking zone. Considering that when processing more than one cookware item at the same time, it is rather unlikely that these items are simultaneously placed onto the cooking appliance, in case that it is determined that adjacent cooking zones are covered by cookware items either simultaneously or in close timely relationship it is assumed that these cooking zones are to be operated in a bridging mode.
  • the time span between such detections can be determined and compared to a predetermined minimum time. If it is determined that the placement of the cookware onto the adjacent cooking zones has been effected in a time period that is less or equal the predetermined minimum time, it is assumed that the cooking zones are to be operated in a bridging mode as a combined cooking zone.
  • the cooking appliance is configured to operate the user interface such that based on the decision whether the cooking zones are to be operated individually or are to be operated as a combined cooking zone, the user interface presents either individual input means for individually selecting a power level for each of the cooking zones, or presents a combined input means for selecting a power level for the combined cooking zone.
  • the user interface can be configured to present an input element for confirming the decision that has been made by the cooking appliance based on determining the temporal relationship of the placement of cookware.
  • the user interface in dependency of the decision taken, may present respective input elements either for individual operation of the cooking zones or for a combined operation of adjacent cooking zones, such input elements may remain inactive until the decision taken by the cooking appliance is confirmed by the user.
  • the user interface may be configured to present, independently from the decision taken by the cookware detection, input means for selecting a bridging mode for adjacent cooking zones.
  • the cooking appliance can be configured such that if adjacent cooking zones are operated in a bridging mode, the bridging mode is maintained until the bridged cooking zones are switched off. That is, once a bridging mode has been selected, either by active choice of the user or based on an automated decision taken by the cooking appliance based on the cookware detection, the common operation of the respective cooking zones remains active until the bridged cooking zones are switched off, such as by turning the power level of the combined zone to zero, by switching off the combined zone either manually or by applying timer functions, or by turning off the cooking appliance.
  • the cooking appliance can be configured such that when it is detected that cookware is removed from a cooking zone, the respective cooking zone is switched off.
  • the cooking appliance can be configured such that when it is detected that cookware is removed from a cooking zone which is operated in bridging mode, the bridging mode is terminated and the cooking zone from which cookware has been removed is switched off.
  • the cooking appliance can be configured to prevent an unintended operation of a cooking zone after removal of the respective cookware item that has been heated in such cooking zone, so as to avoid unnecessary power consumption but also to avoid safety risks, the cooking appliance can be configured to wait, upon detection of removal of cookware from a cooking zone, with switching off the cooking zone or terminating the bridging mode.
  • a certain delay time so as to allow a temporary removal of the cookware item from the cooking zone, for example to allow the cookware item to be shortly lifted off without impacting the heating operation, such as to allow for stir-frying, decanting or the like.
  • the operation parameters such as the power level and any timer functions applied, are temporarily stored until expiry of the delay time, whereupon such parameters are continued to be applied in case that it is detected that cookware again is present in the respective cooking zone. Should no cookware have been detected on expiry of the delay time, the respective function is turned off.
  • a cooking appliance as suggested herein usually is provided for conducting a cooking process which comprises at least one heating step of food, such as a baking, roasting, frying, boiling, steaming or braising.
  • a food item or a volume of cooking liquid is put on a cooking surface of the appliance.
  • a cooking container or cookware item e.g. a cooking vessel such as a pan or a pot, optionally closable with a lid, may be advantageously used.
  • a cooking support for example in the form of a cooking surface in case of a hob.
  • Such cooking surface provides a support for the cookware items in the form of more traditional pan supports, like the ones known from gas stoves, or in the form of a plate element, particularly a glass or glass ceramic plate.
  • the cooking appliance For conducting the cooking process, the cooking appliance comprises power-transferring elements. Said power-transferring elements are provided for transferring power to the foodstuff or cooking liquid, which preferably is contained in a cookware item.
  • Such power transferring elements may comprise heating power transferring elements to transfer heating power to the foodstuff or cooking liquid, particularly if contained in a cookware item.
  • Such power transferring elements to transfer heating power particularly are useful to conduct a heating step of such cooking process.
  • the cooking appliance of the present invention comprises at least one energy power unit, particularly provided as a power board, preferably comprising a power generating circuit mounted on a printed circuit board (PCB).
  • An energy power unit as used herein preferably comprises at least one power generator for generating power and supplying power-transferring elements with power.
  • a cooking appliance in the form of a cooking hob may comprise at least one heating energy power unit, particularly provided as a power board, preferably comprising a heating power generating circuit mounted on a printed circuit board (PCB).
  • An energy power unit as used herein preferably comprises at least one heating power generator for generating heating power and supplying heating power transferring elements with heating power.
  • two coils per power board which coils selectively can be bridged or can be operated independently.
  • more than two coils can be bridged to form to a combined zone, and alternatively or additionally two or more than two coils can be bridged that are supported by more than one power board.
  • the heating power may be provided particularly by heat, more particularly heat radiation.
  • the heating power may be provided by heat generating power, particularly a heat generating magnetic field, more particularly an induction field.
  • the cooking appliance preferably is a cooking hob, more preferably an induction hob.
  • the cooking appliance particularly a cooking hob, more particularly an induction hob, comprises at least two heating zones.
  • Such heating zones referred to herein preferably refer to a portion of the cooking support, which is associated with a certain number, particularly one or two heating power transferring elements, e.g. a radiant heating element or an induction coil in case of a cooking hob.
  • such heating zone as referred to herein, preferably refers to a portion of the cooking surface, which is associated with one heating power transferring element, e.g. a radiant heating element or an induction coil, which is arranged below the cooking surface, e.g. the glass ceramic plate.
  • a heating zone preferably refers to a portion of the cooking surface in which heating power of one or two associated heating power transferring element is transferred to the foodstuff or cookware item, and, preferably may only be driven by the same power or heating level.
  • the cooking surface may comprise more than two cooking zones, each comprising one or more heating zones.
  • a cooking zone may be provided which comprises two or more than two, particularly, three concentrically arranged coils.
  • a cooking zone may be provided by at least two, preferably more than two, more preferably a plurality of, adjacently arranged heating zones, such as an array or a matrix of heating power transferring elements which are provided below a glass plate which forms the cooking plate.
  • the heating zones may be combined to one or more cooking zones, in a predetermined and fixed or flexible manner.
  • a hob may comprise two heating zones, which form one or two cooking zones, wherein each heating zone can be driven with the same or a different heating or power level.
  • more than two, or more than three, particularly four heating zones may be arranged in a row, and form one or more cooking zones.
  • heating zones of said row may form one cooking zone or cooking sub zone.
  • an array of heating zones can be provided as a two-dimensional matrix of heating power transferring elements. In such case a number of adjacent heating power transferring elements, thus heating zones, particularly two, more than two, three, more than three, four or more than four may form one or more cooking zones respectively.
  • each heating zone of a respective cooking zone is supplied with the same heating power, and can be controlled independent from any other cooking or heating zone.
  • a second operation mode at least two heating zones are bridged to form a common cooking zone.
  • the bridged heating zones can be driven with the same heating power level, wherein only a single user input is required to select the power level for all of the bridged heating zones.
  • Such heating power transferring elements are usually arranged and/or mounted on a heating power transferring element carrier or heating power transferring element support.
  • the heating power transferring elements e.g. induction coils or radiation heaters
  • the heating power transferring elements are supported by a carrier made of aluminum sheet metal.
  • one coil carrier is provided to support more than one induction coil.
  • the particularly preferred embodiment of the present invention considers that said two heating power transfer elements are arranged on and supported by one common heating power transfer element carrier, such as an induction coil carrier plate.
  • the hob preferably induction hob, according to the present invention preferably comprises energy power units for transferring heating power to each of the heating zones.
  • all heating power transfer elements which are arranged on and supported by a common heating power transfer element carrier (i.e. induction coil carrier plate), are driven by the same energy power unit.
  • a cooking zone comprises preferably at least one heating zone, more preferably at least two, still more preferably at least three heating zones. Additionally, or alternatively, the hob may be configured such that the number of heating zones associated with one cooking zone may vary in dependency of the needs of the cook and/or the size, form or kind of cookware placed on the cooking surface.
  • the energy power unit comprises preferably at least one generator for providing heating power to the at least one heating zone.
  • the heating power may be provided, particularly by heat, more particularly by heat radiation.
  • the heating power may be provided by heat generating power, particularly a heat generating magnetic field, more particularly an induction field.
  • the cooking hob of the present invention preferably is an induction hob.
  • the energy power unit may be supported and arranged in a housing, preferably a plastic housing. This allows easy manufacturing and modularization.
  • the energy power unit, and particularly the associated power circuit unit may be configured to be connected to at least one, preferably two phases of a mains supply. Thereby the energy power unit may particularly be provided in the form of a half-bridge configuration and/or a quasi-resonant configuration.
  • the inventive appliance comprises at least one control unit for controlling the energy power units.
  • the control unit is configured to assign a pre-determined and/or adjustable heating power level to the power generating circuit and as a result the heating power transfer elements may be supplied with the respectively assigned heating power.
  • the control unit further is connected, optionally via control means, with the user interface, by means of which the user can provide various inputs, such as select power or temperature levels for individual heating or cooking zones, or select further program options such as timer functions, automated cooking functions and the like.
  • the user interface employed herein further is used for displaying the various operation parameters and program options of the cooking appliance.
  • the user interface is a touchscreen element which provides for display and input functions in one and the same area of the user interface, wherein the parameters and available functions are adaptively presented to the user in dependency of the present state of the cooking process and the selections made by the user.
  • the present invention further provides for methods for operating a cooking appliance, wherein the cooking appliance comprises a plurality of cooking zones, means for detecting whether cookware is present in the cooking zones, and a user interface for setting a power level for each of the cooking zones and for selecting whether at least two cooking zones are operated independently or as a combined cooking zone.
  • the method comprises detecting upon power-up of the cooking appliance whether cookware is present in the cooking zones, and if it is detected that cookware is present in at least two adjacent cooking zones, presenting input means for individually selecting a power level for each of the adjacent cooking zones, and further presenting input means for selecting a bridging mode for operating adjacent cooking zones as a combined cooking zone.
  • the method comprises detecting during operation of the cooking appliance when cookware is placed onto at least two adjacent cooking zones, and determining the temporal relationship of the placement of cookware onto adjacent cooking zones so as to render a decision whether the cooking zones are to be operated individually or are to be operated in a bridging mode as a combined cooking zone.
  • a method can comprise one or both of the above method aspects.
  • FIG 1 illustrates a schematic top view of a cooking hob 10 according to the present invention.
  • Cooking hob 10 is designed as an induction hob which includes a number of induction coils 12.
  • the concept suggested herein is not restricted to any particular type of hob and thus could be implemented in any kind of hob, it can be implemented in a particularly advantageous manner in an induction hob, because in an induction hob no separate sensors are required to provide for pot detection, but instead the induction coils used to supply the heating energy to the cooking zones can also be used to implement a pot detection function, such as by measuring inductivity or capacity of an induction coil, which parameters change when a pot is set to overlay the induction coil.
  • the appliance of the present invention comprises a respective cookware recognition means which implements a cookware recognition algorithm.
  • a respective cookware recognition means which implements a cookware recognition algorithm.
  • the control unit may induce a certain amount of inductivity in an induction coil and then determine whether an inductive coupling with cookware placed on top of the cooking surface is detected.
  • the induction cooking hob 10 includes six or twelve induction coils 12, respectively.
  • each induction coil 12 is formed as a horizontal triangular disc having the shape of a right-angled triangle the corners of which are rounded.
  • each induction coil 12 is formed as a circular coil having round shape.
  • Other shapes of coils are also known in the art, particularly oval coils or partially oval, D-shaped coils and the like, which are readily applicable within the scope of the present invention.
  • the induction coils 12 are arranged in such a way that substantially the complete surface of the induction cooking hob 10 is covered by the induction coils 12 except for the surface region in which the user interface 14 is provided.
  • the induction coils 12 are arranged in such a way that each coil 12, particularly each pair of neighboring induction coils 12 may form a cooking zone.
  • Figs. 1 and 2 neighboring coils, which covers a rectangular or square area wherein the hypotenuses of each pair of neighboring induction coils 12 are arranged side-by-side and extend parallel to each other.
  • the six pairs of induction coils 12 are arranged on the induction cooking hob 10 so as to form a three-by-two matrix of cooking zones.
  • Other cooking zones 30 can be formed, particularly by a pair of two horizontally or vertically neighbored coils as depicted in Fig. 3 .
  • a cooking zone 28 may be also formed by more than two coils, e.g. four coils in a row (see e.g. Fig. 1 ) or column, or square (see Fig. 3 ).
  • each of the induction coils 12 of a hob 10 could be regarded as a "cooking zone", in the following description the present invention is described by reference to an embodiment in which the cooking zones are formed by the above mentioned pairs of induction coils 12, or cooking zones comprising more than one coil 12. That is, while in a standard or default operation mode any of the pairs of induction coils 12 is operated as a cooking zone of substantially elliptical, substantially rectangular or substantially square shape, in certain circumstances one or more of these cooking zones can be operated in a split mode, in which only one of the respective pair of induction coils 12 is operated, such as for heating smaller vessels, such as small round cooking vessel 16 shown in Fig.
  • a cooking zone the shape of which cannot be implemented by combining any of the square cooking zones, such as for heating large-sized circular cooking vessel 20 for which several cooking zones that are operated in split mode are operated in a bridging mode.
  • Fig. 3 it can be readily understood that on one single coil 12 a standard pot or pan may be placed and heated, whereas a cooking zone comprising a pair of coils 12 provides a cooking surface for a larger more elongate cooking vessel, like a plancha, roasting pan, or the like.
  • other combinations of coils 12 for providing cooking zones may be advantageously considered within the scope of the invention, particularly comprising more than two coils, particularly four coils.
  • Such cooking zones 28 or 30 comprise more than two coils and advantageously provide for cooking surfaces and cooking zones adapted for larger cooking vessels, particularly having larger diameter in at least one direction.
  • each induction coil 12 is driven by one induction generator.
  • two of the induction coils 12 may be connected in a serial or a parallel way, wherein the induction coils 12 may be switched by relays, triacs or IGBTs (insulated-gate bipolar transistors).
  • the induction coils 12 are driven by synchronized induction generators in order to avoid interference noise between the different induction coils 12.
  • the at least one user interface 14 is arranged in a front portion of the induction cooking hob 10.
  • the at least one user interface 14 may be adapted to allow separate control of each or a number of the induction coils 12 but also allows two or more adjacent induction coils 12 and similarly two or more adjacent cooking zones to be operated simultaneously as a combined zone, as is further explained by reference to Fig. 2 .
  • FIG 2 illustrates a schematic top view of the induction cooking hob 10 shown in Fig. 1 , wherein Fig. 2 additionally shows several possible arrangements of cookware items, such as cooking pots or pans, of different size and shape.
  • a small-sized circular cooking vessel 16 is arranged above a single induction coil 12 in the rear left corner of the induction cooking hob 10.
  • the area of the small-sized circular cooking vessel 16 extends within the area of the corresponding induction coil 12.
  • a medium-sized circular cooking vessel 18 may be arranged above two induction coils 12 in the front left corner of the induction cooking hob 10.
  • the area of the medium-sized circular cooking vessel 18 extends within the area of the two induction coils 12 which together form the rectangular or square lower left cooking zone of the three-by-two matrix of cooking zones.
  • a large-sized circular cooking vessel 20 may be arranged above four induction coils 12, as is illustrated in a central portion on the left hand side of the induction cooking hob 10.
  • the four induction coils 12 below the large-sized circular cooking vessel 20 form a rectangular or square area, wherein said rectangular or square area is arranged diagonally with respect to the surface of the induction cooking hob 10.
  • the four induction coils 12 below the large-sized circular cooking vessel 20 belong to four different pairs of induction coils 12, i.e. belong to four different cooking zones each of which is operated in split mode.
  • Fig. 2 illustrates a first rectangular cooking vessel 22 which is arranged above four induction coils 12 in the rear corner on the right hand side of the induction cooking hob 10. Said four induction coils 12 belong to two neighboring pairs of induction coils 12 in the rear region of the induction cooking hob 10.
  • a second rectangular cooking vessel 24 is shown to be arranged upon four induction coils 12 on the right hand side of the induction cooking hob 10. Again, said four induction coils 12 belong to two neighboring pairs of induction coils 12.
  • a cooking zone may be formed by a pair of two of the triangular shaped coils, as is evident from the examples shown, a cooking zone may comprise a single coil (such as for heating small circular cooking vessel 16) or may comprise more than two coils (such as for heating the large-sized circular cooking vessel 20).
  • the cooking zones may be zones that are marked, such as by printing, on the surface of the hob, such as the six square zones mentioned above in the description of Fig. 1 .
  • the appliance comprises a main switch 26 for switching ON or OFF the appliance.
  • the user may place a cookware item on the cooking surface, i.e. above any of the induction coils 12.
  • a cookware detection algorithm is initiated in which it is determined that the four inductions coils in the right portion of the cooking surface, i.e. the front right cooking zone 28 and the rear right cooking zone 30 (see Fig. 1 ), are covered.
  • the user interface 14 presents means for individually selecting a power level for each of cooking zones 28 and 30, and further presents input means for selecting a bridging mode for operating cooking zones 28 and 30 as a combined cooking zone.
  • Such input means for selecting a bridging mode can be for example a button or a bridging symbol which is displayed on user interface 14, for example between respective icons for cooking zones 28 and 30.
  • the user interface 14 changes its appearance by hiding the input elements for individually selecting a power level for cooking zones 28 and 30, and instead presents a single input means for selecting a power level of the combined cooking zone.
  • the bridging mode has been selected, also the bridging symbol no longer is required and hence can be hidden.
  • the respective cooking zones that constitute the combined cooking zone cannot be de-bridged.
  • the power level of the combined zone has to be set to zero.
  • the bridge icon is made visible again, and upon touching the bridge icon, the cooking zone can be debridged into two individual cooking zones, whereby separate input elements for individually and independently selecting power levels for cooking zones 28 and 30 again are made visible or are activated.
  • the pot recognition algorithm is initiated as soon as a cookware item is placed on the cooking plate which covers the inductions coils 12. With the pot recognition algorithm being initiated each time when a cookware item is placed on the cooking plate, when it is detected that two cooking zones are covered, the pot recognition algorithm determines whether the two cooking zones were covered at the same time, or substantially at the same time, i.e. within a predetermined time period.
  • the control unit assumes that these cooking zones are covered by the same cookware item. In such case the covered cooking zones are automatically bridged to constitute a single combined cooking zone.
  • a single input element for selecting the power level of the combined zone is presented at the user interface 14. If desired, a further input element can be presented, by which the decision suggested by the pot recognition algorithm is to be confirmed, wherein the input element for selecting the power level of the combined zone is activated only upon a confirmation having been made.
  • the hob further can be configured such that when it is detected that cookware is removed from a cooking zone, the respective cooking zone is switched off. Similarly, the hob can be configured such that when it is detected that cookware is removed from a cooking zone which is operated in bridging mode, the bridging mode is terminated and the cooking zone from which cookware has been removed is switched off. In alternative embodiments, upon detecting the removal of cookware from at least one of the bridged cooking zones, the user interface 14 can present a respective message or icon, wherein further an input element for terminating the bridge mode may be presented.
  • further action such as terminating the bridging mode or turning off a cooking zone, can be delayed for a predetermined time interval, which preferably is within a range of from 30 seconds to 3 minutes, such as 2 minutes. If within such time interval it is detected that cookware is again present in the respective cooking zone the operation of the cooking zone is continued in the same manner as before detecting the removal of cookware.
  • the selected operating parameters are temporarily stored until expiry of the delay period, upon which operation either is continued with these operating parameters, or the respective mode is terminated and the temporarily stored operating parameters are discarded.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Stoves And Ranges (AREA)

Claims (23)

  1. Gargerät, Folgendes umfassend:
    - mehrere Garzonen (12; 28, 30);
    - Mittel zum Detektieren, ob Kochgeschirr in den Garzonen vorhanden ist;
    - mindestens eine Benutzerschnittstelle (14) zum Einstellen einer Leistungsstufe für jede der Garzonen (12; 28, 30) und zum Auswählen, ob mindestens zwei Garzonen unabhängig voneinander oder als eine kombinierte Garzone betrieben werden;
    dadurch gekennzeichnet, dass das Gargerät dazu ausgelegt ist, beim Einschalten des Gargeräts zu detektieren, ob Kochgeschirr in den Garzonen (12; 28, 30) vorhanden ist, und wenn detektiert wird, dass Kochgeschirr in mindestens zwei aneinander angrenzenden Garzonen vorhanden ist, die Benutzerschnittstelle (14) Eingabemittel anzeigt, um für jede der aneinander angrenzenden Garzonen eine Leistungsstufe einzeln auszuwählen, und ferner Eingabemittel anzeigt, um einen Überbrückungsmodus zum Betreiben von aneinander angrenzenden Garzonen als eine kombinierte Garzone auszuwählen.
  2. Gargerät nach Anspruch 1, das dazu ausgelegt ist, die mindestens eine Benutzerschnittstelle (14) derart zu betreiben, dass bei Auswahl eines Überbrückungsmodus von aneinander angrenzenden Garzonen (12; 28, 30) die Eingabemittel zum einzelnen Auswählen einer Leistungsstufe für jede der aneinander angrenzenden Garzonen verborgen werden und dass ein Eingabemittel zum Auswählen einer Leistungsstufe der kombinierten Garzone angezeigt wird.
  3. Gargerät nach Anspruch 1 oder 2, das dazu ausgelegt ist, die mindestens eine Benutzerschnittstelle (14) derart zu betreiben, dass bei Auswahl eines Überbrückungsmodus von aneinander angrenzenden Garzonen (12; 28, 30) das Eingabemittel zum Auswählen eines Überbrückungsmodus für jene Garzonen verborgen wird, für welche ein Überbrückungsmodus ausgewählt worden ist.
  4. Gargerät, Folgendes umfassend:
    - mehrere Garzonen (12; 28, 30);
    - Mittel zum Detektieren, ob Kochgeschirr in den Garzonen vorhanden ist;
    - mindestens eine Benutzerschnittstelle (14) zum Einstellen einer Leistungsstufe für jede der Garzonen und zum Auswählen, ob mindestens zwei Garzonen unabhängig voneinander oder als eine kombinierte Garzone betrieben werden;
    dadurch gekennzeichnet, dass das Gargerät dazu ausgelegt ist, während des Betriebs des Gargeräts zu detektieren, wenn Kochgeschirr auf mindestens zwei aneinander angrenzenden Garzonen (12; 28, 30) platziert wird, wobei basierend auf der zeitlichen Beziehung des Platzierens von Kochgeschirr auf aneinander angrenzenden Garzonen eine Entscheidung getroffen wird, ob die Garzonen einzeln betrieben werden sollen oder in einem Überbrückungsmodus als eine kombinierte Garzone betrieben werden sollen.
  5. Gargerät nach Anspruch 4, bei dem eine Entscheidung getroffen wird, dass die Garzonen (12; 28, 30) als eine kombinierte Garzone betrieben werden sollen, wenn bestimmt wird, dass das Platzieren von Kochgeschirr in aneinander angrenzenden Garzonen in einem Zeitraum von kleiner oder gleich einer vorbestimmten Mindestzeit ausgeführt worden ist.
  6. Gargerät nach Anspruch 4 oder 5, das dazu ausgelegt ist, die mindestens eine Benutzerschnittstelle (14) derart zu betreiben, dass basierend auf der Entscheidung, ob die Garzonen (12; 28, 30) einzeln zu betreiben sind oder als eine kombinierte Garzone zu betreiben sind, die Benutzerschnittstelle entweder einzelne Eingabemittel zum einzelnen Auswählen einer Leistungsstufe für jede der Garzonen anzeigt oder kombinierte Eingabemittel zum Auswählen einer Leistungsstufe für die kombinierte Garzone anzeigt.
  7. Gargerät nach einem der Ansprüche 4 bis 6, bei dem die Benutzerschnittstelle (14) dazu ausgelegt ist, ein Eingabeelement zum Bestätigen der Entscheidung anzuzeigen.
  8. Gargerät nach einem der Ansprüche 4 bis 7, bei dem die Benutzerschnittstelle (14) dazu ausgelegt ist, unabhängig von dieser Entscheidung Eingabemittel zum Auswählen eines Überbrückungsmodus für aneinander angrenzende Garzonen (12; 28, 30) anzuzeigen.
  9. Gargerät nach einem der vorhergehenden Ansprüche, das dazu ausgelegt ist, dass, wenn aneinander angrenzende Garzonen (12; 28, 30) in einem Überbrückungsmodus betrieben werden, der Überbrückungsmodus beibehalten wird, bis die überbrückten Garzonen ausgeschaltet werden.
  10. Gargerät nach einem der vorhergehenden Ansprüche, das dazu ausgelegt ist, dass, wenn detektiert wird, dass Kochgeschirr von einer Garzone (12; 28, 30) entfernt wird, die jeweilige Garzone ausgeschaltet wird.
  11. Gargerät nach einem der vorhergehenden Ansprüche, das dazu ausgelegt ist, dass, wenn detektiert wird, dass Kochgeschirr von einer Garzone (12; 28, 30) entfernt wird, die im Überbrückungsmodus betrieben wird, der Überbrückungsmodus beendet wird und die Garzone, von der Kochgeschirr entfernt worden ist, ausgeschaltet wird.
  12. Gargerät nach Anspruch 10 oder 11, bei dem bei Detektion des Entfernens von Kochgeschirr aus einer Garzone (12; 28, 30) eine weitere Aktion für einen vorbestimmten Zeitintervall verzögert wird, wobei, wenn innerhalb dieses Zeitintervalls detektiert wird, dass in der jeweiligen Garzone wieder Kochgeschirr vorhanden ist, der Betrieb der Garzone wie vor dem Detektieren des Entfernens von Kochgeschirr fortgesetzt wird.
  13. Verfahren zum Betreiben eines Gargeräts, wobei das Gargerät Folgendes umfasst:
    - mehrere Garzonen (12; 28, 30);
    - Mittel zum Detektieren, ob in den Garzonen Kochgeschirr vorhanden ist;
    - eine Benutzerschnittstelle (14) zum Einstellen einer Leistungsstufe für jede der Garzonen und zum Auswählen, ob mindestens zwei Garzonen unabhängig voneinander oder als eine kombinierte Garzone betrieben werden;
    wobei das Verfahren Folgendes umfasst:
    Detektieren, bei Einschalten des Gargeräts, ob Kochgeschirr in den Garzonen (12; 28, 30) vorhanden ist, und wenn detektiert wird, dass Kochgeschirr in mindestens zwei aneinander angrenzenden Garzonen vorhanden ist, Anzeigen von Eingabemitteln zum einzelnen Auswählen einer Leistungsstufe für jede der aneinander angrenzenden Garzonen und ferner Anzeigen von Eingabemitteln zum Auswählen eines Überbrückungsmodus zum Betreiben von aneinander angrenzenden Garzonen als eine kombinierte Garzone.
  14. Verfahren nach Anspruch 13, umfassend, bei Auswahl eines Überbrückungsmodus von aneinander angrenzenden Garzonen (12; 28, 30):
    Verbergen der Eingabemittel zum einzelnen Auswählen einer Leistungsstufe für jede der aneinander angrenzenden Garzonen und
    Anzeigen von Eingabemitteln zum Auswählen einer Leistungsstufe der kombinierten Garzone.
  15. Verfahren nach Anspruch 13 oder 14, umfassend, bei Auswahl eines Überbrückungsmodus von aneinander angrenzenden Garzonen (12; 28, 30):
    Verbergen der Eingabemittel zum Auswählen eines Überbrückungsmodus für die Garzonen, für welche ein Überbrückungsmodus ausgewählt wurde.
  16. Verfahren zum Betreiben eines Gargeräts, wobei das Gargerät Folgendes umfasst:
    - mehrere Garzonen (12; 28, 30);
    - Mittel zum Detektieren, ob Kochgeschirr in den Garzonen vorhanden ist;
    - eine Benutzerschnittstelle (14) zum Einstellen einer Leistungsstufe für jede der Garzonen und zum Auswählen, ob mindestens zwei Garzonen unabhängig voneinander oder als eine kombinierte Garzone betrieben werden;
    wobei das Verfahren Folgendes umfasst:
    Detektieren, während des Betriebs des Gargeräts, wenn Kochgeschirr auf mindestens zwei aneinander angrenzenden Garzonen (12; 28, 30) platziert wird, und
    Bestimmen der zeitlichen Beziehung der Platzierung von Kochgeschirr auf aneinander angrenzenden Garzonen, um eine Entscheidung zu erbringen, ob die Garzonen einzeln zu betreiben sind oder ob sie in einem Überbrückungsmodus als eine kombinierte Garzone zu betreiben sind.
  17. Verfahren nach Anspruch 16, bei dem eine Entscheidung getroffen wird, dass die Garzonen (12; 28, 30) als eine kombinierte Garzone zu betreiben sind, wenn bestimmt wird, dass die Platzierung von Kochgeschirr in aneinander angrenzenden Garzonen in einem Zeitraum von kleiner oder gleich einer vorbestimmten Mindestzeit ausgeführt worden ist.
  18. Verfahren nach Anspruch 16 oder 17, bei dem basierend auf der Entscheidung, ob die Garzonen (12; 28, 30) einzeln zu betreiben sind oder als eine kombinierte Garzone zu betreiben sind, entweder die einzelnen Eingabemittel zum einzelnen Auswählen einer Leistungsstufe für jede der Garzonen angezeigt werden oder kombinierte Eingabemittel zum Auswählen einer Leistungsstufe für die kombinierte Garzone angezeigt werden.
  19. Verfahren nach einem der Ansprüche 16 bis 18, ferner umfassend Anzeigen eines Eingabeelements zum Bestätigen der Entscheidung durch den Benutzer.
  20. Verfahren nach einem der Ansprüche 13 bis 19, bei dem, wenn aneinander angrenzende Garzonen (12; 28, 30) in einem Überbrückungsmodus betrieben werden, der Überbrückungsmodus beibehalten wird, bis die überbrückten Garzonen ausgeschaltet werden.
  21. Verfahren nach einem der Ansprüche 13 bis 20, bei dem, wenn detektiert wird, dass Kochgeschirr von einer Garzone (12; 28, 30) entfernt wird, die jeweilige Garzone ausgeschaltet wird.
  22. Verfahren nach einem der Ansprüche 13 bis 21, bei dem, wenn detektiert wird, dass Kochgeschirr von einer Garzone (12; 28, 30) entfernt wird, die im Überbrückungsmodus betrieben wird, der Überbrückungsmodus beendet wird und die Garzone, von welcher Kochgeschirr entfernt worden ist, ausgeschaltet wird.
  23. Verfahren nach einem der Ansprüche 13 bis 22, bei dem bei Detektion des Entfernens von Kochgeschirr von einer Garzone (12; 28, 30) eine weitere Aktion für einen vorbestimmten Zeitintervall verzögert wird, wobei, wenn innerhalb dieses Zeitintervalls detektiert wird, dass in der jeweiligen Garzone wieder Kochgeschirr vorhanden ist, der Betrieb der Garzone wie vor dem Detektieren des Entfernens von Kochgeschirr fortgesetzt wird.
EP17187261.7A 2017-08-14 2017-08-22 Kochgerät und verfahren zur steuerung eines kochgeräts Active EP3445134B1 (de)

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IT201900006553A1 (it) * 2019-05-07 2019-08-07 Fabita S R L Piano di cottura a induzione con zone di cottura programmabili a differenti temperature.
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ES2382431B1 (es) * 2009-07-29 2013-05-08 BSH Electrodomésticos España S.A. Aparato de coccion con al menos dos zonas de calentamiento
ES2439417B1 (es) * 2012-07-20 2015-03-12 Bsh Electrodomesticos Espana Dispositivo de campo de cocción
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