EP3777479A1 - Kochgerät, insbesondere haushaltskochgerät, insbesondere kochfeld, insbesondere induktionskochfeld mit mindestens zwei heizelementen - Google Patents

Kochgerät, insbesondere haushaltskochgerät, insbesondere kochfeld, insbesondere induktionskochfeld mit mindestens zwei heizelementen

Info

Publication number
EP3777479A1
EP3777479A1 EP19711946.4A EP19711946A EP3777479A1 EP 3777479 A1 EP3777479 A1 EP 3777479A1 EP 19711946 A EP19711946 A EP 19711946A EP 3777479 A1 EP3777479 A1 EP 3777479A1
Authority
EP
European Patent Office
Prior art keywords
heating
heating element
cooking appliance
power
cooking
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19711946.4A
Other languages
English (en)
French (fr)
Inventor
Alex Viroli
Massimo Nostro
Peter Negretti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electrolux Appliances AB
Original Assignee
Electrolux Appliances AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Electrolux Appliances AB filed Critical Electrolux Appliances AB
Publication of EP3777479A1 publication Critical patent/EP3777479A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices
    • H05B6/1209—Cooking devices induction cooking plates or the like and devices to be used in combination with them
    • H05B6/1245—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special coil arrangements
    • H05B6/1272—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special coil arrangements with more than one coil or coil segment per heating zone
    • 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
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices
    • H05B6/1209—Cooking devices induction cooking plates or the like and devices to be used in combination with them
    • H05B6/1245—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special coil arrangements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices
    • H05B6/1209—Cooking devices induction cooking plates or the like and devices to be used in combination with them
    • H05B6/1245—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special coil arrangements
    • H05B6/1254—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special coil arrangements using conductive pieces to direct the induced magnetic field
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2206/00—Aspects relating to heating by electric, magnetic, or electromagnetic fields covered by group H05B6/00
    • H05B2206/02—Induction heating
    • H05B2206/022—Special supports for the induction coils
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Definitions

  • Cooking appliance particularly domestic cooking appliance, more particularly cooking hob, more particularly induction hob with at least two heating elements
  • the present invention relates to a cooking appliance, particu larly domestic cooking appliance, more particularly cooking hob, more particularly induction hob with at least two heating ele ments .
  • the cooking surface can be divided into different cooking zones of varying size, and/or at least two heating power transferring elements can be driven in parallel to form a common cooking zone.
  • EP 2 991 445 A1 describes an induction heating ar rangement, comprising a first induction coil having a first di ameter and being arranged in a first plane with at least two second induction coils having at least one second diameter and being arranged in a second plane, wherein each second diameter is smaller than the first diameter or size; the second induction coils being arranged around the first induction coil and each of the second induction coils partially overlapping with the first induction coil in respective overlapping regions.
  • This problem is solved by the cooking appliance, in particular cooking hob, according to claim 1.
  • Such cooking appliances in particu lar household cooking hobs, usually are provided for conducting at least one cooking process comprising heating and/or cooling step, respectively.
  • Such cooking process preferably at least comprises a heating step, e.g. frying, boiling, simmering or pouching of a foodstuff or a cooking liquid, respectively.
  • a heating step e.g. frying, boiling, simmering or pouching of a foodstuff or a cooking liquid, respectively.
  • a cooking support for example in the form of a cooking surface.
  • Such cooking surface usually provides a support for the cookware items, for example, provided in the form of a plate element, particularly a glass or glass ceramic plate.
  • the cooking hob comprises, preferably consists of, a cooking support and a lower casing.
  • a cooking support may be provided particularly as at least one panel, wherein preferably the panel is a glass ceramic panel.
  • at least one or more heat ing power transferring elements are arranged beneath the panel.
  • the lower casing may be manufactured from different material comprising plastics or metal, e.g. aluminum.
  • such casing may include a bottom wall and at least one sidewall. It is preferred that said casing is made of metal, e.g. aluminium or steel, and/or plastics, wherein prefer ably the casing made of metal is grounded.
  • said lower casing may comprise at least one heat ing power energy unit, particularly arranged in a respective heating power energy unit housing, the heating power transfer ring elements, heating power transferring element carrier or heating power transferring element support.
  • the lower casing and the cooking support may form a closed unit com prising all essential parts of the cooking hob.
  • the lower casing may comprise fastening means for fastening and/or arranging the cooking hob on top of or in a cutout of a work plate .
  • a power-transferring element may be ar ranged below a cooking support.
  • the one or more heating power transferring elements are arranged in an upper portion of the lower casing of the cooking hob.
  • a power trans ferring element may be arranged and supported by one or more heating power transferring element carrier or heating power transferring element support, preferably the power transferring element attached and/or arranged on said carrier or support.
  • a housing comprising an energy power unit may be arranged below one or more heating power transferring element carrier or heat ing power transferring element supports.
  • a heating power transferring element carrier or heating power transferring element support with the supported heating power transferring element may advantageously be arranged on top of and/or attached to such housing of an energy power unit.
  • a cooking appliance for conducting the cooking process, particularly a heating step, comprises at least one heating power-transferring element.
  • Said heating power-transferring element is provided for transferring heating power to the foodstuff or cooking liquid, preferably contained in a cookware item.
  • the at least one heating power transferring element is an electric heating element, in particular an induction heat ing element, particularly induction coil, and/or radiant heating element.
  • the heating power provided by a heating power-transfer ring element may be preferably provided electrically.
  • the heating power may be provided by a heat-generating mag netic field, more particularly an induction field.
  • the cooking hob of the present invention preferably is an induc tion hob.
  • a heating power-transferring element in the form of an induction coil comprises a planar conductive winding wire, particularly a copper wire.
  • an induction coil com prises at least one magnetic field supporting element, e.g. a ferrite element.
  • said at least one magnetic field supporting element, particularly at least one ferrite element is arranged below the plane of the conductive winding wire.
  • Said at least one magnetic field supporting element, particularly ferrite element is advantageous in establishing and/or support ing the high frequent alternating magnetic field of the induc tion coil.
  • Said magnetic field supporting element, particularly if arranged below the conductive winding wire may be glued to or supported by ferrite support elements, e.g. snap fit connect ors or the like.
  • an induction coil comprises a shielding element, e.g. a mica sheet.
  • the shielding element preferably is adapted to the form of the planar conductive winding wire or the form of at least two planar conductive winding wires of at least two ad jacently arranged coils.
  • the shielding element preferably is provided above the at least one magnetic field supporting ele ment, particularly at least one ferrite element.
  • the shielding element preferably in its main function is a support for the planar conductive wire windings of the coil.
  • the shielding element, particularly mica sheet may also shield temperature radiated from the above, e.g. resulting from a heated up pot bottom.
  • the at least one heating power transferring element is preferably arranged and/or mounted on a heating power transferring element carrier or heating power transferring ele ment support, particularly comprised in the lower casing. It is particularly preferred that a carrier made of aluminum sheet metal supports the heating power-transferring element.
  • the cooking hob of the present invention may comprise power transferring element carrier or heating power transferring element support to support one heating power transferring ele ment, however, it is also considered herein that one power transferring element carrier or heating power transferring ele ment support is provided to support more than one heating power transferring element.
  • two heating power-transferring elements are arranged on and supported by one common heating power transferring element carrier.
  • Particularly at least two induction coils are arranged on and supported by one common induction coil carrier plate.
  • the heating power transferring element carrier or heating power transferring element support may be advantageously supported by or on a housing of the heating energy power unit.
  • At least one of, preferably all of, the heating power transferring elements of an cooking hob of the invention may be arranged below a cooking support, particularly a cooking surface in form of a plate element, and particularly within the lower casing, in order to provide the heat for a heating step to a heating zone of the cooking support and to the bottom side of a cookware item and foodstuff, respectively, when placed on said heating zone.
  • a cooking support of a cooking hob of the invention preferably comprises at least one heating zone.
  • Such heating zone as referred to herein, preferably refers to a portion of the cooking support, particularly cooking surface, which is associated with one heat ing power transferring element, e.g. a radiant heating element or an induction coil, which is arranged at, preferably below, the cooking support, e.g. the glass ceramic plate.
  • heat ing power transferring element e.g. a radiant heating element or an induction coil
  • the cooking support e.g. the glass ceramic plate.
  • the cooking hob of the pre sent invention is an induction hob
  • it is preferred that such heating zone refers to a portion of the cooking support, which is associated with at least one induction coil.
  • the heating power transferring elements associated with a heating zone are preferably configured such that the same heating power of the associated heating power transferring elements is trans ferred to the heating zone.
  • the heating zone thus refers to a portion of the cooking support to which the same heating power of the associated at least one heating power transferring element is transferred.
  • the cooking hob of the present invention may par ticularly be configured such that in one operation mode one or more than one heating zones form one cooking zone and/or are combined to one cooking zone, respectively.
  • a cooking zone may be particularly be provided as at least a portion of the cooking surface. Particularly, such cooking zone is associated with at least one heating zone. Additionally, or alternatively, a cook ing zone may be associated with more than one heating zone.
  • Par ticularly, a cooking zone may be associated with an even number, particularly two, four, six, eight or ten, more particularly two, heating zones. Alternatively, a cooking zone may be associ ated with an uneven number, particularly three, five, seven or nine, more particularly three, heating zones.
  • the cooking hob of the present invention is config ured such that a cooking zone comprises one or more than one heating zones, which can be driven with the same or different power, frequency or heating level.
  • a cooking zone comprises at least two, preferably two, heating zones, driven by the same power, frequency or heating level.
  • a cooking zone comprises or is associated with at least two, preferably two, heating power-transferring elements.
  • the cooking hob of the present invention may be configured such that the number of heating zones associated with one cooking zone may vary and/or may be adjustable dependent on the needs of the cook and/or the size, form or kind of cookware placed on the cooking surface.
  • a cooking hob according to the present invention may com prise at least one heating power energy unit.
  • a heating power energy unit as used herein preferably provides energy to at least one of, preferable a number of, the heating power trans ferring elements such that the heating power transferring ele ment is capable of transferring heating power for heating up the foodstuff or cooking liquid.
  • a heating power energy unit of an induction hob may provide energy in the form of a high frequency alternating current to a heating power-transfer ring element in the form of an induction coil, which transfers heating power in the form of a magnetic field to a suitable cookware item.
  • a heating power energy unit may comprise at least one associated power circuit mounted and/or arranged on at least one printed circuit board.
  • a heating power energy unit is supported and arranged in a hous ing, preferably a plastic housing, preferably arrangable in and adapted to the lower casing. This allows easy manufacturing and modularization.
  • the housing may comprise supporting elements for supporting the heating power transferring element carrier or heating power transferring element support.
  • such supporting elements may comprise elastic means, e.g. springs or silicon elements, for elastically supporting the heating power transferring element carrier or heating power transferring ele ment support, and particularly advantageous in pressing a heat ing power-transferring element onto the bottom surface of the cooking support plate, which particularly is a glass ceramic plate .
  • the heating power energy unit and particularly the associated power circuit, may be configured to be connected to at least one, preferably two phases of a mains supply.
  • a cooking hob according to the present invention thereby comprises at least one, preferably two or three heating power energy units, connected to one or two, preferably one phases of the mains supply each.
  • a heating power energy unit may comprise at least - one associated power circuit, particularly in the form of an at least one heating power generator, for generating heating power and supplying heating power-transferring elements with heating power, particularly for providing heating power to the at least one heating zone.
  • the power circuit particularly may be provided in the form of a half-bridge configuration or a quasi resonant configuration.
  • the heating power energy unit may thus comprise one heating power generator for providing heating power to more than one heating zone, each associated with at least one heating power transferring element.
  • the heating power energy unit may comprise one heating power generator comprising a single or pair of high fre quency switching elements.
  • the high frequency switching element is provided in the form of a semiconductor-switching element, particularly an IGBT element.
  • the heating power energy unit may comprise one heating power generator comprising a single high frequency switching el ement
  • the single switching element preferably forms part of as sociated power circuit, provided in the form of a or a part of a Quasi Resonant circuit.
  • the heating power energy unit may comprise one heating generator comprising a pair of high frequency switching elements
  • said pair of high frequency switching elements prefer ably forms part of an associated power circuit, provided in the form of a or a part of a half-bridge circuit.
  • the heat, generated by and/or radiated from particularly the heating power transferring elements, the heating power energy unit and/or the cookware item, particularly the bottom thereof, may have also disadvantageous effects, particularly regarding safety and proper functioning.
  • the heating power energy unit more particularly power circuits comprising switching ele ments, may generate a significant amount of heat being disad vantage for the safety and proper functioning of the cooking hob.
  • the cooking hob comprises at least one cooling means.
  • said cooling means is adapted for cooling down the electric and/or electronic elements.
  • the heating power energy unit may comprise such cooling means.
  • Such cooling means may comprise at least one of a fan, a cooling channel, a cooling body, preferably from a metal, par ticularly aluminium, cooling air-guiding means, cooling air de flection means and the like.
  • the cooking hob of the present invention may comprise such cooling means for cool ing at least one heating power generator or a part thereof, par ticularly to at least one single or pair of high frequency switching elements.
  • such cooling means may comprise a cooling body, preferably arranged in the air path of a cooling fan, and thermally connected to at least one heating power generator or a part thereof, particularly to at least one single or pair of high frequency switching elements.
  • the cooling means comprises at least one fan for generating an air stream through the cooling channel.
  • the cooling channel and/or cooling body extends horizon tally through the cooking hob.
  • the cooling channel and/or cooling body extends over a substantial part of the hori zontal width of the cooking hob.
  • the cooking appliance in particular the cooking hob according to the present invention, preferably further comprises a control unit.
  • control unit is preferably operatively connected with the heating power energy unit to control at least one opera tional parameter of the cooking hob, particularly an operational parameter of the heating power energy unit.
  • the control unit comprises a user interface at least for receiving a command input of a user. This advantageously allows the user to control at least one operational parameter of the cooking hob, particularly an operational parameter of the heating power en ergy unit.
  • the control unit, and particularly a user interface if present may be operatively connected to other ap pliances or interfaces, e.g. a suction hood, a voice control de vice, a server, a remote interface, a cloud-computing source or the like.
  • the cooking appliance in particular the household cooking hob according to the present invention comprises at least one electric and/or electronic element.
  • said at least one electric and/or electronic element comprises a heating power energy unit and/or control unit or parts thereof.
  • the at least one electric and/or electronic ele ment of the household cooking hob of the present invention may be part of an at least one heating energy power unit, preferably mounted and/or arranged on a power board and/or a power generat ing circuit mounted on a printed circuit board (PCB) .
  • PCB printed circuit board
  • Such at least one electric and/or electronic element may be, for example, selected from the group comprising a heating power gen erator, filter coils, EMC filters, rectifier, switching ele ments, like IGBTs, relays, or the like.
  • the cooking appliance preferably implements a concept which al lows a flexible use of the cooking appliance.
  • the concept in particular relates to the link of two or more cooking zones in order to allow the users for cooking on larger areas just on de mand.
  • the basic benefit is then to adapt the dimensions of the cooking zone to the dimensions of the cookware.
  • These embodi ments are highlighting different ways of linking the power level between two or more cooking zones. Therefore, the user has to adjust just one power level for all the zones involved, that in this way are practically acting as one larger zone. It is possi ble for example to set just one timer for the end-cooking func tion. This so called "bridging" operation mode is preferably shown on the user interface.
  • the bridg ing functionality can be implemented with the synchronization of two or more power inverters. These power inverters can be physi cally located on the same power board or on separate power boards of the same cooking appliance, depending on the typology of bridging required.
  • the present inventors have surprisingly found that an alterna tive to the bridging solution can be provided. Rather than link ing the power level on two or more ' 'basic' heating elements in order to have a larger cooking zone available, the idea of the invention is in particular to add one or more 'extra' heating elements covering a larger area on the cooktop and using a sepa rate power level for these extra heating elements control.
  • the aim of the invention is in particular to have the freedom in separate power level control for each of the heating elements.
  • the heating elements may work simultaneously or alternately.
  • An alternate control of a first element and a second element against a third element may in particular represent an optimized case of power control to achieve better cooking performance.
  • the larger cooking zone may be covered or formed by a third element only, where the first and second elements may be used just to heat up the smaller cooking zones.
  • the number of configurations of heating elements arranged in similar way on a cooking appliance is in particular unlimited and it depends mostly on the dimensions, the shape and the quan tity of both basic and extra elements.
  • the power boards are preferably physically representing a limit as well, as they comprise a specific number of outputs for the heating elements control. Preferred embodiments are including but are not limited to the details of the shown embodiments.
  • a possible embodiment is an induction cooktop in standard con figuration with four heating elements overlapped by two oval heating elements on both front and rear zones. This arrangement is therefore preferably including six heating elements, all sep arately driven 1 to 1 by 6 power inverters, located for example on two separated power boards .
  • the heating elements are preferably coils.
  • the power inverters may be included in one or more power boards of the same cooking appliance.
  • a first heating element and a second heating element are supposed to work alternately to a third heating element. Then, the first heating element and the second heating element may work at the same time, but the first heating element and the second heating element shall not work while the third heating element is on.
  • the third heating element can be specifically designed to work properly on the larger area, covering both by the first coil and the second heating element cooking zones and this larger cooking zone control is done with just one power setting.
  • the operational mode and considerations may be exactly the same as for the first heating element, the second heating element and the third heating element.
  • the topology can be different, as the overlapping heating elements are vertically oriented instead of the former horizontal orientation.
  • the configuration is slightly differ ent, as there is just one big, preferably circular, overlapping heating element over the four standard heating elements. How ever, the idea is still to drive one to one the heating ele ments, in this case, overall by five inverters.
  • the first to fourth heating elements are supposed to work alter nately to a fifth heating element. Then, the first to fourth heating elements may work at the same time, but the first to fourth heating elements shall not work while the fifth heating element is on.
  • the fifth heating element can be specifically de signed to work properly on the larger area, covering all heating elements, in particular the first to fourth heating elements, and this larger cooking zone control is done with just one power setting .
  • one big oval heating element is overlapping two smaller round heating elements, therefore the concept can be extended with several configurations.
  • the overlapping area may be small or large according to the required performances.
  • the idea is preferably to physically place the big heating element over the small ones.
  • induction coils features ferrites.
  • the big overlapping coil can exploit the ferrites of the coils below. Therefore, the overlapping coil may be just a winding means, without including any ferrites and/or coil carrier. This is representing an advantage in terms of overall thickness of this new induction system.
  • the overall overlapping coil system thickness can be given then by the small coil thickness plus just the thickness of the overlapping winding, as an example, about 3mm more, instead of -lOmrn, if ferrites and coil carrier were considered.
  • bifilar coil is known in literature and it is done by two wires wrapped in par allel. Thus, this kind of coil comprises 2+2 and hence four ends instead of just two of the standard coils. The basic idea is to take two bifilar coils and to connect them together.
  • the bifilar coils can be connected on one end, that is a series connection. It is possible to have a parallel connection as well.
  • An embodiment comprises overall three coils: two small coils and one big coil covering the area of the smaller ones. Therefore, the working principle may be the same as described above.
  • a cooking appliance according to the invention preferably in cludes two or more heating elements, where one or more heating elements are overlapped by one or more further heating elements.
  • the size and the shape of the overlapping heating elements may be different on different cooking appliance embodi ments, therefore the area where overlapping occurs may change in size and shape, therefore the cooking zone identified by the overlapping area may be different on different hob embodiments.
  • the size of one or more overlapping heating ele ments may be such that one or more further heating elements are overlapped .
  • the size of one or more overlapping heating ele ments may be such that a small cooking area is identified thereof, wherein this small cooking area is the smallest cooking area available in the considered cooking appliance.
  • the size of one or more overlapping heating ele ments may be that a large cooking area is identified thereof, where this large cooking area is at least bigger than the small est cooking area available in the considered cooking appliance.
  • the size of one or more overlapping heating ele ments may cover the whole cooking appliance surface.
  • the shape of one or more, in particular overlap ping, heating elements may be oval.
  • the space orientation of one or more overlapping heating elements may be either horizontal, vertical, or any other orientation useful to provide space flexibility.
  • the heating elements may be driven individually, each one by separate power regulator means.
  • the power regulators may be located on the same power board or on separate power boards .
  • the overlapping heating elements may work alter nately with the overlapped heating elements.
  • the overlapping heating elements may be physically put on top of one or more overlapped heating elements.
  • the overlapping heating elements electrical parame ters may be given by specific parts in common with the over lapped heating elements.
  • the heating elements are or may be induction coils.
  • the overlapping coils electrical parameters may be given by the ferrites in common with the overlapped coils areas.
  • the overlapped coils electrical parameters may be given by the ferrites in common with the overlapping coils ar eas .
  • both overlapping and overlapped coils may feature no ferrites or may just partially feature ferrites or coil carrier.
  • the overlapping coils may be achieved with one or more multiple wire coils.
  • the multiple wire coils may be achieved with wrapped wires running in parallel.
  • the multiple wire coils may comprise two or more ends .
  • two or more multiple wire coils may be connected to gether in series or in parallel configuration.
  • a cooking appliance particularly domestic cooking appliance, more particularly cooking hob, more particularly induction hob, comprising: at least two heating elements, in particular two heating ele ments, three heating elements, four heating elements, at least three heating elements, at least four heating elements, five heating elements, at least five heating elements, six heating elements, at least six heating elements, eight heat ing elements, at least eight heating elements, ten heating elements or at least ten heating elements,
  • a first heating element is at least partially inter woven with and/or overlapping with and/or covering and/or covered by at least a second heating element and/or a third heating element.
  • a domestic cooking hob more par ticularly induction hob, comprising: at least two heating elements, in particular two heating ele ments, three heating elements, four heating elements, at least three heating elements, at least four heating elements, five heating elements, at least five heating elements, six heating elements, at least six heating elements,
  • a first heating element is at least partially inter woven with and/or overlapping with and/or covering and/or covered by at least a second heating element and/or a third heating element.
  • a domestic cooking hob more par ticularly domestic induction hob or household induction hob, comprising : six heating elements or at least six heating elements, wherein a first heating element, in particular a first induc tion coil, is at least partially interwoven with and/or over lapping with and/or covering and/or covered by at least a second heating element, in particular a second induction coil, and/or a third heating element, in particular a third induction coil,
  • a fourth heating element in particular a fourth in duction coil
  • a fifth heating element in particular a fifth induction coil
  • a sixth heating element in particular a sixth induc tion coil.
  • a first heating element is at least partially overlapping with a second heating element and/or a third heating element. Therefore, for example, the first heating element is preferably at least partially, essen tially or completely covering the second heating element and/or a third heating element.
  • the first heating element is preferably at least partially, essentially or com pletely covered by the second heating element and/or a third heating element.
  • a first heating element is overlapping with a second heating element
  • first heating element is arranged, preferably directly and/or when view from a first viewing direction, above or below the second heating element.
  • a first heating element is overlapping with a second heating element
  • first heating element is arranged interwoven with the second heating element. If the first heating element and the second heating elements are coils, this can mean in particular that the windings of the first coil alternate with the windings of the second coil.
  • a fourth heating element may be at least par tially interwoven with and/or overlapping with and/or covering and/or covered by a fifth heating element and a sixth heating element .
  • a first heating element may be at least partially interwoven with and/or overlapping with and/or covering and/or covered by at least a second heating element, a third heating element, a fourth heating element and a fifth heating element.
  • the first heating element is or may be essentially or completely interwoven with and/or overlapping with and/or covering and/or covered by at least the second heating element and/or the third heating element.
  • the fourth heating element is essentially or completely interwoven with and/or overlapping with and/or covering and/or covered by the fifth heating element and the sixth heating element.
  • the first heating element is essentially or completely interwoven with and/or overlapping with and/or covering and/or covered by at least the second heating element, the third heating element, the fourth heating element and the fifth heating element.
  • the first heating element may be larger than the second heating element and larger than the third heating ele ment, in particular of the same size like or larger than the second heating element and the third heating element together and/or the fourth heating element may be larger than the fifth heating element and larger than the sixth heating element, in particular of the same size like or larger than the fifth heat ing element and the sixth heating element together.
  • first heating element and/or the second heat ing element and/or the third heating element and/or the fourth heating element and/or the firth heating element and/or the sixth heating element may have the same parameters, in particu lar the same inductance parameters, more in particular the same inductance .
  • the first heating element may be split physically in two parts and each of these two parts are interwoven and/or over lapping and/or covering respectively the second and the third heating elements and/or the fourth heating element may be split physically in two parts and each of these two parts are interwoven and/or over lapping and/or covering respectively the fifth and the sixth heating elements and/or
  • the sum of the inductance of the split parts may be equal to the inductance of the first heating element and/or
  • the two parts of the split heating elements may be connected electrically in series together.
  • the first heating element may have the size as the sum of the second, the third, the fourth and the fifth heating elements and/or
  • the first heating element may have the same inductance as the second, the third, the fourth and the fifth heating elements and/or
  • the first heating element may be physically split in at least two parts, in particular in four parts, wherein the sum of the inductance of the split parts may be equal to the induct ance of the first heating element and/or
  • the split parts of the first heating element may be interwo ven and/or overlapping and/or covering the second, the third, the fourth and the fifth heating elements and/or
  • two or more parts of the split heating element may be con nected electrically in series together.
  • the first heating element may be arranged on a first level and/or the second and/or the third heating element may be arranged on a second level.
  • first and the second level may be parallel and identical or spaced apart, so that the first heating element on the one hand and the second and third heating element on the other hand can be arranged on top of each other.
  • the second, the third, the fifth and the sixth heating element may be arranged as a 2 x 2 matrix and/or as a half-moon .
  • the second, third, firth and/or the sixth heating element may each cover at least essentially a triangular, rec tangular, in particular square-, oval- or circle shaped, first heating area,
  • the second and the fifth heating ele ments cover together at least essentially a triangular, oval, square or rectangular shaped second heating area
  • the third and the sixth heating ele ments cover together at least essentially a triangular, oval, square or rectangular shaped third heating area and/or wherein in particular the second heating area and the third heating area are essentially parallel or shifted by an angle of 50° to 80°.
  • the first heating element may cover at least essen tially a triangular, oval, square or rectangular shaped fourth heating area,
  • the fourth heating element covers at least essentially a triangular, oval, square or rectangular shaped fifth heating area and/or
  • first and the second heating area cover together a sixth heating area and/or
  • the sixth heating area is essentially identical with the seventh heating area.
  • the sixth heating area may be surrounded by a seventh, an eighth, a ninth and a tenth heating element, so that an eighth heating area is formed, wherein more in particular the eighth heating area is essentially rectangular.
  • the cooking appliance may comprise at least one power supply unit, particularly two or at least two, three or at least three power supply units.
  • the power supply unit may comprise a power board and/or a PCB circuit.
  • a first power supply unit supplies power for the first heating element and/or a second power supply unit may sup ply power for the third heating element and/or the first power supply unit may supply power for the second heating element.
  • the cooking appliance comprises six heating elements or at least six heating elements, wherein in particular the first power supply unit supplies power for a fourth heating ele ment and/or the second power supply unit supplies power for a sixth heating element and/or the first power supply unit sup plies power for a fifth heating element.
  • the first power supply unit is or can be supplied with a first electrical input power, in particular by a first AC power supply, with a first current phase and/or the second power supply unit is or can be supplied with a second electrical input power, in particular by a second AC power supply, with a second current phase, wherein in particular the second current phase is different, preferably phase shifted, compared to the first cur rent phase.
  • the electrical input power may be a mains power supplied by an external power net supplying the at least two current phases, each current phase being operated with an effec tive voltage between 100 V and 250 V, in particular between 220 V and 240 V.
  • the alternating currents of the AC power supplies are supplied with a, in particular first frequency, in particu lar in a frequency range of 50 Hz to 60 Hz, and/or phase shifted with respect to each other, in particular with a phase shifting angle of essentially 120°.
  • the at least two current phases may be supplied by two, at least two or three phase wires as well as a neutral wrre .
  • each power supply unit comprises at least one power conversion unit for converting electrical input power supplied by means of at least one alternating current with at least one current phase, and/or supplied by means of a one-phase electric power or two-phase electric power, into internal electrical power, in particular with a direct current, to supply at least one or at least two heating units, preferably at least one or at least two frequency generator (s) or inverter (s), with electrical power .
  • at least one power conversion unit for converting electrical input power supplied by means of at least one alternating current with at least one current phase, and/or supplied by means of a one-phase electric power or two-phase electric power, into internal electrical power, in particular with a direct current, to supply at least one or at least two heating units, preferably at least one or at least two frequency generator (s) or inverter (s), with electrical power .
  • each heating element or heating unit has a predeter mined first maximum electrical power, wherein all heating ele ments or heating units have a predetermined overall maximum electrical power, wherein the power conversion unit has a prede termined second maximum electrical power, wherein preferably the predetermined overall maximum electrical power is lower, equal to or higher than the second maximum electrical power.
  • the power conversion unit may comprise at least one frequency adaption unit, in particular at least one filtering unit to filter the one, the two, the at least one or the at least two current phases.
  • the power conversion unit for converting electrical input power into electrical internal power may comprise a recti fier, in particular a two-phase-rectifier, a three-phase-recti- fier or an arrangement of two or three single-phase-rectifiers.
  • the at least one rectifier can be a bridge-recti fier and/or a diode-rectifier.
  • the electrical internal power in particular of each power board, is supplied as one, two, at least one or at least two DC-BUSes, DC rails, bus bars, power rails, equipotential rails and/or a direct current powers supplying the direct cur rent .
  • the internal electrical power in particular of each power board, is supplied as one, at least one, two or at least two direct current powers by means of one, at least one or at least two direct currents, each with two wires, in particular with exactly and/or only two wires, wherein in particular a first wire is operated with a first voltage, preferably a refer ence or ground voltage, and a second wire is operated with a second voltage, preferably with a constant, fixed and/or supply voltage .
  • the at least two heating units may be supplied with power by means of the electrical internal power from the power conversion unit by means of the direct current.
  • the at least two heating units in particular each heating unit, is/are, in particular only, supplied with power by means of said first and said second wire, by means of the DC- BUS, DC rail, bus bar, power rail and/or the equipotential rail.
  • the heating units may be induction heating units and/or each heating unit may comprise at least one heating fre quency unit and at least one induction heating element, in par ticular at least one heating coil.
  • each heating frequency unit may comprise at least one frequency generator or inverter for supplying at least one heating element with power.
  • each heating frequency unit is a generator or in verter for converting the direct current into an alternating current being supplied with a high frequency, in particular sec ond frequency, in particular with a frequency in a range of 10 kHz to 100 kHz .
  • the/each generator or inverter may comprise a half bridge circuit, a full bridge circuit or a quasi-resonant circuit .
  • the/each generator or inverter may comprise one, at least one, two, or at least two power switches, in particular IGBTs or relays.
  • at least one heating frequency unit is connected with at least one heating element by means of a switching ma trix, which connects at least a first one of the heating fre quency units with a first one of the heating elements, wherein the switching matrix comprises in particular switching elements, in particular relays or IGBT's.
  • each heating unit in particular each heating ele ment, may operate, at least partially, a cooking zone of the cooking appliance.
  • each heating unit of a cooking zone can be, in at least one operating mode, operated only with the same heating density and/or with the same electrical and/or thermal power.
  • the first and the fourth heating element and/or the second and the fifth heating element can be bridged and/or com bined, in at least one operating mode, to at least one cooking zone and/or each of the first, the second, the third, fourth, fifth and/or the sixth heating element can be bridged and/or combined, in at least one operating mode, to a cooking zone.
  • the heating elements may be arranged as a matrix, in particular with two, at least two, three, at least three, four or at least four rows and with two, at least two, three, at least three, four or at least four columns.
  • the cooking appliance comprises four or at least four essentially circular cooking zones and four or at least four essentially oval cooking zones, wherein the four or at least four essentially circular cooking zones are arranged in ternally as a matrix, preferably as a 2x2 matrix, wherein the four or at least four essentially oval cooking zones are par tially overlapping with each other, in particular in the edge areas, wherein in particular a first, preferably oval, cooking zone overlaps with a first and a second essentially circular cooking zone, wherein in particular a second, preferably oval, cooking zone overlaps with a third and a fourth essentially cir cular cooking zone, wherein in particular a third, preferably oval, cooking zone comprises the first and the third essentially circular cooking zones and/or wherein in particular a fourth, preferably oval, cooking zone comprises the second and a fourth essentially circular cooking zone.
  • At least the first and/or the second cooking zone may be constituted by a single heating element, in particular by a single heating coil.
  • each heating element may be formed by one or two coils .
  • the first, the second, the third, the fourth, the fifth, the sixth, the seventh, the eighth, the ninth and/or the tenth heating elements are oval-shaped or shaped as a circle and/or the first, the second, the third, the fourth, the fifth the sixth, the seventh, the eighth, the ninth and/or the tenth heating elements are shaped as a square and/or the first, the second, the third, the fourth, the fifth, the sixth, the sev enth, the eighth, the ninth and/or the tenth heating elements are shaped as a triangle.
  • the first, the second, the third, the fourth and/or the fifth heating element may be essentially of circular shape .
  • the first and/or the fourth heating element are of essentially circular or oval shape or the first and/or the fourth heating element is/are of essentially bicircular shape, so that the first heating element essentially overlaps with the second and/or the first heating element and/or the fourth heat ing element essentially overlaps with the fifth and/or the sixth heating element.
  • the essentially oval cooking zones may be larger than the essentially circular cooking zones.
  • the cooking appliance comprises a single surface with a single cooking surface, in particular as a glass ceramic surface, for placing cooking vessels to be heated on it in cook ing zones, wherein preferably a user interface for operating the cooking appliance, in particular for operating the cooking zones, is integrated into the single surface.
  • a pot detection unit comprising at least one pot detection sensor, detects the position of one, at least one, two, at least two, three or at least three cooking vessels, so that the at least one cooking vessel can be placed anywhere on the cooking surface, and a cooking zone is determined, in par ticular automatically or manually, which corresponds to the po sition of the pot.
  • the at least one pot detection sensor may be at least partially integrated, in particular identical, with the heating elements, in particular with the heating coils.
  • each heating unit may comprise at least one heat ing element and/or each heating element comprises at least one heating coil.
  • each or at least some of the heating elements com prise at least one heating coil, core, in particular ferrite core and/or insulated wire wound in windings around a core, wherein in particular at least two heating elements at least partially share a core or wherein in particular at least three heating elements at least partially share two cores.
  • the first and the third heating element and/or the second and the third heating element are at least partially im plemented as a bifilar coil, in particular as an electromagnetic coil that contains two closely spaced, parallel windings.
  • the third heating element may be interwoven with the first and/or the second heating element.
  • a common controller may be used to operate the at least two power supply units, wherein in particular the control ler and the power supply units use the same reference voltage.
  • each heating unit and/or the power conversion unit may be thermally connected with one, at least one, two or at least two cooling elements, in particular heat sinks.
  • FIG. 1 illustrates a schematic top view of an arrangement of a cooking appliance according to a first preferred embod iment of the present invention
  • FIG. 2 illustrates a schematic top view of an arrangement of a cooking appliance according to a second preferred em bodiment of the present invention
  • FIG. 3 illustrates a schematic top view of an arrangement of a cooking appliance according to a third preferred embod iment of the present invention
  • FIG. 4 illustrates a schematic top view of an arrangement of a cooking appliance according to a fourth preferred em bodiment of the present invention
  • FIG. 5 illustrates a schematic top view of an arrangement of a cooking appliance according to a fifth preferred embod iment of the present invention
  • FIG. 6 illustrates a schematic top view of an arrangement of a cooking appliance according to a sixth preferred embod iment of the present invention
  • FIG. 7 illustrates a schematic top view of an arrangement of a cooking appliance according to a seventh preferred em bodiment of the present invention
  • FIG. 1 to FIG. 7 show cooking appliances 1 according to the in vention.
  • the cooking appliance 1 is particularly a domestic cooking appliance, more particularly cooking hob, more particularly an induction hob.
  • Each cooking appliance 1 in FIG. 1 to FIG. 7 has at least two heating elements, three heating elements, at least three heating elements, at least four heating elements, five heating elements, at least five heating elements, six heating elements or at least six heating elements.
  • the cooking appliance 1 in FIG. 1 has six heating elements.
  • the cooking appliance 1 in FIG. 2 has two heating elements.
  • the cooking appliance 1 in FIG. 3 has six heating elements.
  • the cooking appliance 1 in FIG. 4 has five heating elements.
  • the cooking appliance 1 in FIG. 5 has ten heating elements.
  • cooking appliances can comprise also two heating elements, four heating elements, eight heating elements, at least eight heating elements, or at least ten heating ele ments .
  • each heating element is or is constituted preferably by one coil, two coils or at least one coil.
  • a first heating element 10 is at least partially, in particular essentially or completely, interwoven with and/or overlapping with and/or covering and/or covered by at least a second heating element 20 and a third heating element 21.
  • a first heating element 12 is at least partially, in particular essentially or completely, interwoven with and/or overlapping with and/or covering and/or covered by at least a second heating element 20 and a third heating element21.
  • a first heating element 10 is at least partially, in particular essentially or completely, interwoven with and/or overlapping with and/or covering and/or covered by at least a second heating element 20 and a third heating element 21.
  • a first heating element 10 is at least partially, in particular essentially or completely, interwoven with and/or overlapping with and/or covering and/or covered by at least a second heating element 70 and a third heating element 71.
  • a first heating element 45 is at least partially, in particular essentially or completely, interwoven with and/or overlapping with and/or covering and/or covered by at least a second heating element 50 and a third heating element 51.
  • a first heating element 60 is at least partially, in particular essentially or completely, interwoven with and/or overlapping with and/or covering and/or covered by at least a second heating element 80 and a third heating element 81.
  • a first heating element 65 is at least partially inter woven with and/or overlapping with at least a second heating el ement 82 and a third heating element 83.
  • a fourth heating element 11 is at least partially, in particular essentially or completely, interwoven with and/or overlapping with and/or covering and/or covered by a fifth heat ing element 22 and a sixth heating element 23.
  • a fourth heating element 11 is at least partially, in particular essentially or completely, interwoven with and/or overlapping with and/or covering and/or covered by a fifth heat ing element 22 and a sixth heating element 23.
  • a fourth heating element 46 is at least partially, in particular essentially or completely, interwoven with and/or overlapping with and/or covering and/or covered by a fifth heat ing element 52 and a sixth heating element 53.
  • a first heating element 12 is at least partially, in particular essentially or completely, interwoven with and/or overlapping with and/or covering and/or covered by at least a second heating element 20, a third heating element 21, a fourth heating element 22 and a fifth heating element 23.
  • the first heating element 10 is larger than the sec ond heating element 20 and larger than the third heating element 21, in particular of the same size like or larger than the sec ond heating element 20 and the third heating element 21 to gether .
  • the fourth heating element 11 in FIG. 1 is larger than the fifth heating element 22 and larger than the sixth heating element 23, in particular of the same size like or larger than the fifth heating element 22 and the sixth heating element 23 together.
  • the first heating element 10 and/or the second heating element 20 and/or the third heating element 21 and/or the fourth heating element and/or the firth heating element and/or the sixth heat ing element have the same parameters, in particular the same in ductance parameters, more in particular the same inductance.
  • the first heating element 10 is arranged on a first level and the second 20 and the third 21 heating element are arranged on a second level.
  • the first and the second level are parallel and spaced apart, so that the first heating element 10 on the one hand and the second and third heating elements 20, 21 on the other hand are arranged on top of each other.
  • the second heating element 20, the third heating element 21, the fifth heating element 22 and the sixth heating element 23 are arranged as a 2 x 2 matrix.
  • the second 20, third 21, firth 22 and/or the sixth heating element 23 each cover at least essen tially a circle shaped, first heating area.
  • the second heating element 20 and the fifth heating element 22 cover together at least essentially a rectangular shaped second heating area 24.
  • the third heating element 21 and the sixth heat ing element 23 cover together at least essentially a rectangular shaped third heating area 25.
  • the second heating area 24 and the third heating area 25 are essentially parallel.
  • the first heating element 10 covers at least essentially an oval or rectangular shaped fourth heating area.
  • the fourth heating element 11 covers at least essentially an oval or rectangular shaped fifth heating area.
  • the second heating area 24 and the third heating area 25 are ro tated by essentially 90° compared to the fourth heating area 10 and the fifth heating area 11.
  • the second heating area 24 and the third heating area 25 cover together a sixth heating area.
  • the fourth heating area 10 and the fifth heating area 11 cover together a seventh heating area.
  • the sixth heating area is essentially identical with the seventh heating area.
  • the first heating element 12 is larger than the sec ond heating element 20 and larger than the third heating element 21, in particular of the same size like or larger than the sec ond heating element 20 and the third heating element 21 to gether .
  • the first heating element 12 and/or the second heating element 20 and/or the third heating element 21 and/or the fourth heating element and/or the firth heating element and/or the sixth heat ing element have the same parameters, in particular the same in ductance parameters, more in particular the same inductance.
  • the first heating element 12 in FIG. 2 is arranged on a first level and the second and the third heating element are arranged on a second level.
  • the first and the second level are parallel and spaced apart, so that the first heating element on the one hand and the second and third heating elements on the other hand are arranged on top of each other.
  • the second 20, the third 21, the fifth 22 and the sixth heating element 23 are arranged as a 2 x 2 matrix.
  • the second 20, third 21, firth 22 and/or the sixth 23 heating element each cover at least essentially circle shaped, first heating areas.
  • the second 20, third 21, firth 22 and/or the sixth 23 heating element together cover an at least essentially square shaped, seventh heating area.
  • the second heating element 20 and the fifth heating element 22 cover together at least essentially an oval or rectangular shaped second heating area 24.
  • the third heating element 21 and the sixth heating element 23 cover together at least essentially an oval or rectangular shaped third heating area 25.
  • the second heating area 24 and the third heating area 25 are es sentially parallel.
  • the first heating element 12 covers at least essentially a cir cular shaped fourth heating area.
  • the second heating area 24 and the third heating area 25 cover together a sixth heating area.
  • the sixth heating area is essen tially identical with the seventh and the fourth heating area.
  • the first heating element 10 is larger than the sec ond heating element 20 and larger than the third heating element 21, in particular of the same size like or larger than the sec ond heating element 20 and the third heating element 21 to gether .
  • the fourth heating element 11 in FIG. 3 is larger than the fifth heating element 22 and larger than the sixth heating element 23, in particular of the same size like or larger than the fifth heating element 22 and the sixth heating element 23 together.
  • the first heating element 10 and/or the second heating element 20 and/or the third heating element 21 and/or the fourth heating element and/or the firth heating element and/or the sixth heat ing element have the same parameters, in particular the same in ductance parameters, more in particular the same inductance.
  • the first heating element 10 is arranged on a first level and the second and the third heating element are arranged on a sec ond level.
  • the first and the second level are parallel and spaced apart, so that the first heating element on the one hand and the second and third heating element on the other hand is arranged on top of each other.
  • the second 20, the third 21, the fifth 22 and the sixth heating element 23 are arranged as a 2 x 2 matrix.
  • the second 20, third 21, firth 22 and/or the sixth heating ele ment 23 each cover at least essentially circle shaped first heating areas.
  • the second 20 heating element and the fifth heating element 22 cover together at least essentially a rectangular shaped second heating area 24.
  • the third heating element 21 and the sixth heating element 23 cover together at least essentially a rectan gular shaped third heating area 25.
  • the second heating area 24 and the third heating area 25 are essentially parallel.
  • the first heating element 10 covers at least essentially an oval or rectangular shaped fourth heating area.
  • the fourth heating element 11 covers at least essentially a rectangular shaped fifth heating area.
  • the second heating area 24 and the third heating area 25 are ro tated by essentially 90° compared to the fourth heating area 10 and the fifth heating area 11.
  • the second heating area 24 and the third heating area 25 cover together a sixth heating area.
  • the fourth heating area 10 and the fifth heating area 11 cover together a seventh heating area.
  • the sixth heating area is essentially identical with the seventh heating area.
  • the first heating element 10 is larger than the sec ond heating element 70 and larger than the third heating element 71, in particular of the same size like or larger than the sec ond heating element 70 and the third heating element 71 to gether .
  • the first heating element 10 and/or the second heating element 70 and/or the third heating element 71 and/or the fourth heating element and/or the firth heating element and/or the sixth heat ing element have the same parameters, in particular the same in ductance parameters, more in particular the same inductance.
  • the first heating element 10 in FIG. 4 is arranged on a first level and the second heating element and the third heating ele ment are arranged on a second level.
  • the first and the second level are parallel and spaced apart, so that the first heating element on the one hand and the second and third heating element on the other hand are arranged on top of each other.
  • the second 70, the third 71, the fifth 72 and the sixth heating element 73 are arranged as a half-moon.
  • the second 70, third 71, fifth 72 and/or the sixth 73 heating element each cover at least essentially a circle shaped, first heating area.
  • the second 70 and the fifth 72 heating elements cover together at least essentially a rectangular shaped second heating area 74.
  • the third 71 and the sixth heating element 73 cover together at least essentially a rectangular shaped third heating area 75.
  • the second heating area 74 and the third heating area 75 are es sentially shifted by an angle of 50° to 80°.
  • the first heating element 10 covers at least essentially a rec tangular shaped fourth heating area.
  • the second heating area 74 and the third heating area 75 are ro tated by essentially 90° compared to the first 10 heating area.
  • the second heating area 74 and the third heating area 75 cover together a sixth heating area.
  • the sixth heating area is larger than the fourth heating area 10.
  • the first heating element 45 is larger than the sec ond heating element 50 and larger than the third heating element 51, in particular of the same size like or larger than the sec ond heating element 50 and the third heating element 51 to gether .
  • the fourth heating element 46 in FIG. 5 is larger than the fifth heating element 52 and larger than the sixth heating element 53, in particular of the same size like or larger than the fifth heating element 52 and the sixth heating element 53 together.
  • the first heating element 45 and/or the second heating element 50 and/or the third heating element 51 and/or the fourth heating element and/or the firth heating element and/or the sixth heat ing element have the same parameters, in particular the same in ductance parameters, more in particular the same inductance.
  • the first heating element 45 is arranged on a first level and the second heating element and the third heating element are ar ranged on a second level.
  • the first and the second level are parallel and spaced apart, so that the first heating element on the one hand and the second heating element and third heating element on the other hand are arranged on top of each other.
  • the second 50, the third 51, the fifth 52 and the sixth heating element 53 are arranged as a 2 x 2 matrix.
  • the second 50, third 51, firth 52 and/or the sixth 53 heating element each cover at least essentially a triangular, shaped, first heating area.
  • the second heating element 50 and the fifth heating element 52 cover together at least essentially a triangular shaped second heating area 50, 52.
  • the third heating element 51 and the sixth heating element 53 cover together at least essentially a trian gular shaped third heating area 51, 53.
  • the second heating area 50, 52 and the third heating area 51, 53 are essentially paral lel.
  • the first heating element 45 covers at least essentially a tri angular shaped fourth heating area.
  • the fourth heating element 46 covers at least essentially a triangular shaped fifth heating area .
  • the second heating area and the third heating area are rotated by essentially 90° compared to the fourth 45 and the fifth 46 heating area.
  • the first and the second heating area cover together a sixth heating area.
  • the fourth heating area 45 and the fifth heating area 46 cover together a seventh heating area.
  • the sixth heating area is essentially identical with the seventh heating area.
  • the sixth heating area is surrounded by a seventh 54, an eighth 55, a ninth 56 and a tenth heating element 57, so that an eighth heating area is formed, wherein in particular the eighth heating area is essentially rectangular.
  • the first heating element 60 is larger than the sec ond heating element 80 and larger than the third heating element 81, in particular larger than the second heating element 80 and the third heating element 81 together.
  • the first heating element 60 and/or the second heating element 80 and/or the third heating element 81 have the same parameters, in particular the same in ductance parameters, more in particular the same inductance.
  • the first heating element 60 in FIG. 6 is arranged on a first level and the second heating element 80 and the third heating element 81 are arranged on a second level.
  • the first and the second level are spaced apart, so that the first heating element on the one hand and the second and third heating element on the other hand are arranged on top of each other.
  • the first heating element 60 covers at least essentially an oval or rectangular shaped fourth heating area.
  • the first heating element 65 is larger than the sec ond heating element 82 and larger than the third heating element 83, in particular of the same size like the second heating ele ment 82 and the third heating element 83 together.
  • the first heating element 65 and/or the second heating element 82 and/or the third heating element 83 have the same parameters, in par ticular the same inductance parameters, more in particular the same inductance.
  • the first heating element 65 in FIG. 7 has the size as the sum of the second heating element 82 and the third heating element 83.
  • the first heating element having the same inductance as the sec ond and the third heating elements.
  • the first heating element 65 is physically split in two parts 65A-65B and 65B-65C. The sum of the inductance of the split parts is equal to the inductance of the first heating element.
  • the split parts of the first heating element 65 are interwoven with the second heating element 82 and the third heating element 83.
  • Two parts 65A-65B and 65B-65C of the split heating element 65 are connected electrically in series together.
  • the second heating element 82 is arranged between the first end 82A and the second end 82B.
  • the third heating element 83 is arranged between the first end 83A and the second end 83B.
  • the first heating element 65 is arranged on a first level and the second heating element 82 and the third heating element 83 are arranged on a second level.
  • the first and the second level are identical, so that the first heating element on the one hand and the second and third heating element on the other hand are arranged interwoven with each other.
  • the cooking appliance 1 in FIG. 3 comprises two power supply units 30, 31. Also at least two, three or at least three power supply units are possible.
  • Each power supply unit 30, 31 comprises a power board and/or a PCB circuit.
  • a first power supply unit 30 supplies power for the first heating element 10 and a second power supply unit 31 sup plies power for the third heating element 21.
  • the first power supply unit 30 supplies power for the second heating element 20.
  • the cooking appliance 1 in FIG. 3 comprises six heating elements or at least six heating elements, wherein the first power supply unit 30 supplies power for a fourth heating element 11.
  • the sec ond power supply unit 31 supplies power for a sixth heating ele ment 23 and the first power supply unit 30 supplies power for a fifth heating element 22.
  • the first power supply unit 30 is or can be supplied with a first electrical input power 32, in particular by a first AC power supply, with a first current phase.
  • the second power sup ply unit 31 is or can be supplied with a second electrical input power 32, in particular by a second AC power supply, with a sec ond current phase, wherein in particular the second current phase is different, preferably phase shifted, compared to the first current phase.
  • the electrical input power is a mains power supplied by an ex ternal power net supplying the at least two current phases, each current phase being operated with an effective voltage between 100 V and 250 V, in particular between 220 V and 240 V.
  • the alternating currents of the AC power supplies are supplied with a, in particular first frequency, in particular in a fre quency range of 50 Hz to 60 Hz, and/or phase shifted with re spect to each other, in particular with a phase shifting angle of essentially 120°.
  • the at least two current phases 32 are supplied by two, at least two or three phase wires as well as a neutral wire.
  • Each power supply unit 30, 31 in FIG. 3 comprises at least one power conversion unit 34 for converting electrical input power supplied by means of at least one alternating current with at least one current phase, and/or supplied by means of a one-phase electric power or two-phase electric power, into internal elec trical power 38, in particular with a direct current DC, to sup ply at least one or at least two heating units 36, preferably at least one or at least two frequency generators or inverters, with electrical power.
  • Each heating element or heating unit 36 has a predetermined first maximum electrical power. All heating elements or heating units have a predetermined overall maximum electrical power.
  • the power conversion unit 34 has a predetermined second maximum electrical power. In different embodiments, the predetermined overall maximum electrical power is lower, equal to or higher than the second maximum electrical power.
  • the power conversion unit 34 comprises at least one frequency adaption unit, in particular at least one filtering unit to fil ter the one, the two, the at least one or the at least two cur rent phases.
  • the power conversion unit 34 for converting electrical input power into electrical internal power comprises a rectifier, in particular a two-phase-rectifier, a three-phase-rectifier or an arrangement of two or three single-phase-rectifiers.
  • the at least one rectifier is a bridge-rectifier and/or a diode-recti fier .
  • the electrical internal power 37 in particular of each power board 30, 31, in FIG. 3 is supplied as one, two, at least one or at least two DC-BUSes, DC rails, bus bars, power rails, equipo- tential rails and/or a direct current DC powers supplying the direct current.
  • the internal electrical power 37 in particular of each power board 30, 31, is supplied as one, at least one, two or at least two direct current DC powers by means of one, at least one or at least two direct currents, each with two wires, in particular with exactly and/or only two wires.
  • a first wire is operated with a first voltage, preferably a reference or ground voltage
  • a second wire is operated with a second voltage, preferably with a constant, fixed and/or supply volt age .
  • the at least two heating units are supplied with power by means of the electrical internal power from the power conversion unit 34 by means of the direct current DC 38.
  • the at least two heating units are, in particular only, supplied with power by means of said first and said second wire, by means of the DC-BUS, DC rail, bus bar, power rail and/or the equipotential rail.
  • the heating units are induction heating units.
  • each heating unit com prises at least one heating frequency unit 36 and at least one induction heating element, in particular at least one heating coil .
  • Each heating frequency unit 36 comprises at least one frequency generator or inverter for supplying at least one heating element with power.
  • Each heating frequency unit 36 is a generator or inverter for converting the direct current into an alternating current being supplied with a high frequency, in particular second frequency, in particular with a frequency in a range of 10 kHz to 100 kHz.
  • the or each generator or inverter comprises a half bridge cir cuit, a full bridge circuit or a quasi-resonant circuit.
  • the or each generator or inverter comprises one, at least one, two, or at least two power switches, in particular IGBTs or relays.
  • At least one heating frequency unit 36 is connected with at least one heating element by means of a switching matrix, which connects at least a first one of the heating frequency units with a first one of the heating elements.
  • the switching matrix comprises in particular switching elements, in particular relays or IGBT' s .
  • aach heating unit in particular each heating element, operates, at least partially, a cooking zone of the cooking appliance 1.
  • At least two heating units in particular two, three, at least three, four, at least four, six or at least six heating units, in particular comprising at least one heating frequency unit and at least one induction heating element, in particular at least one heating coil, are configured to operate a cooking zone and/or heat a single cooking vessel.
  • Each heating unit of a cooking zone can be, in at least one op erating mode, operated only with the same heating density and/or with the same electrical and/or thermal power.
  • the first 20 and the fourth heating element 22 and/or the second 21 and the fifth heating element 23 can be bridged and/or com bined, in at least one operating mode, to at least one cooking zone 24, 25.
  • Each of the first, the second, the third, fourth, fifth and/or the sixth heating element can be bridged and/or combined, in at least one operating mode, to a cooking zone 12.
  • the heating elements are arranged as a matrix, in particular with two, at least two, three, at least three, four or at least four rows and with two, at least two, three, at least three, four or at least four columns.
  • the cooking appliance 1 comprises four essentially circular cooking zones 20, 21, 22, 23 and four essentially oval cooking zones 10, 11, 24, 25.
  • the four at least essentially circular cooking zones 20, 21, 22, 23 are arranged internally as a matrix, preferably as a 2x2 ma trix.
  • the four essentially oval cooking zones 10, 11, 24, 25 are partially overlapping with each other, in particular in the edge areas .
  • a first, preferably oval, cooking zone 10 overlaps with a first 20 and a second 21 essentially circular cooking zone.
  • a second, preferably oval, cooking zone 11 overlaps with a third 22 and a fourth 23 essentially circular cooking zone.
  • a third, preferably oval, cooking zone 24 comprises the first 20 and the third 22 essentially circular cooking zones.
  • a fourth, preferably oval, cooking zone 25 comprises the second 21 and a fourth 23 essen tially circular cooking zone.
  • the first 20 and the second 21 cooking zone are constituted by a single heating element, in particular by a single heating coil.
  • each heating element is preferably formed by one coil, by two coils or by at least one coil.
  • the second, the third, the fifth and the sixth heat ing elements are shaped as a circle.
  • the first heating element and fourth heating element are essen tially of oval shape.
  • the first heating element essentially overlaps with the second and the third heating element and the fourth heating element essentially overlaps with the fifth and the sixth heating element.
  • the essentially oval cooking zones are larger than the essen tially circular cooking zones.
  • the first, the second, the third, the fourth, the fifth, the sixth, the seventh, the eighth, the ninth and/or the tenth heating elements are shaped as a circle.
  • the first, the second, the third, the fourth and the fifth heat ing element are essentially of circular shape.
  • the first heating element is of essentially circular or oval shape so that the first heating element essentially overlaps with the second and the third heating element and the fourth heating element and the sixth heating element.
  • the essentially circular first cooking zones is larger than the essentially circular second to fifth cooking zones.
  • the second, the third, the fifth and the sixth heat ing elements are shaped as a circle.
  • the second, the third, the fifth and the sixth heating element are essentially of circular shape .
  • the first and the fourth heating element are of essentially oval shape, so that the first heating element essentially overlaps with the second and the third heating element and the fourth heating element essentially overlaps with the fifth and/or the sixth heating element.
  • the essentially oval cooking zones are larger than the essentially circular cooking zones.
  • the second, the third, the fourth and the fifth heat ing elements are shaped as a circle.
  • the second, the third, the fourth and the fifth heating element are essentially of circular shape .
  • the first heating element is of circular or oval shape, so that the first heating element essentially overlaps with the second and the third heating element.
  • the essentially oval cooking zones are larger than the essentially circular cooking zones.
  • the first, the second, the third, the fourth, the fifth, the sixth, the seventh, the eighth, the ninth and/or the tenth heating elements are shaped as a triangle.
  • the second and the third heating elements are shaped as a circle.
  • the second and the third heating element are essen tially of circular shape.
  • the second heating element and third heating element are of essentially circular shape, wherein the first a heating element is of essentially bicircular shape, so that the first heating element essentially overlaps with the second and the third heating element.
  • the essentially bicircular cooking zone is larger than the essentially circular cooking zones.
  • the cooking appliance 1 comprises a single surface with a single cooking surface, in particular as a glass ceramic surface, for placing cooking ves sels to be heated on it in cooking zones.
  • a single cooking surface in particular as a glass ceramic surface
  • a pot detection unit comprising at least one pot detection sen sor, detects the position of one, at least one, two, at least two, three or at least three cooking vessels, so that the at least one cooking vessel can be placed anywhere on the cooking surface, and a cooking zone is determined, in particular auto matically or manually, which corresponds to the position of the pot .
  • the at least one pot detection sensor is at least partially in tegrated, in particular identical, with the heating elements, in particular with the heating coils.
  • each heating unit com prises at least one heating element.
  • Each heating element com prises at least one heating coil.
  • FIG. 6 shows a core, in particular ferrite core 85 and/or insulated wire wound in windings around a core.
  • At least two, in this embodiment three heating elements 60, 80, 81 at least partially share a core.
  • at least three heating elements 60, 80 and 81 at least partially share two cores 85, 86.
  • the first heating element 65 and the third heating element 82 and the first heating element 65 and the third heating element 83 can be at least partially implemented as a bifilar coil, in particular as an electromagnetic coil that contains two closely spaced, parallel windings, as shown in FIG. 7.
  • the first heating element 65 is interwoven with the second heating element 82 and the third heating element 83.
  • a common controller 40 is used to operate the at least two power supply units 30, 31.
  • the control ler 40 and the power supply units 30, 31 use the same reference voltage .
  • Each heating unit and/or the power conversion unit are thermally connected with one, at least one, two or at least two not shown cooling elements, in particular heat sinks.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Induction Heating Cooking Devices (AREA)
EP19711946.4A 2018-04-10 2019-03-26 Kochgerät, insbesondere haushaltskochgerät, insbesondere kochfeld, insbesondere induktionskochfeld mit mindestens zwei heizelementen Withdrawn EP3777479A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18166515 2018-04-10
PCT/EP2019/057540 WO2019197148A1 (en) 2018-04-10 2019-03-26 Cooking appliance, particularly domestic cooking appliance, more particularly cooking hob, more particularly induction hob with at least two heating elements

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EP3777479A1 true EP3777479A1 (de) 2021-02-17

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EP19711946.4A Withdrawn EP3777479A1 (de) 2018-04-10 2019-03-26 Kochgerät, insbesondere haushaltskochgerät, insbesondere kochfeld, insbesondere induktionskochfeld mit mindestens zwei heizelementen

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EP4013189A1 (de) * 2020-12-08 2022-06-15 Electrolux Appliances Aktiebolag Induktionskochfeld und verfahren zur steuerung eines induktionskochfelds
CN112902239A (zh) * 2021-02-20 2021-06-04 黎伟文 一种多工位电炉的同步控制方法
EP4192193A3 (de) * 2021-12-03 2024-01-17 BSH Hausgeräte GmbH Induktionskochfeldvorrichtung

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Publication number Priority date Publication date Assignee Title
CA1001261A (en) * 1971-04-06 1976-12-07 Environment/One Corporation Temperature control circuit
DE102006023800B4 (de) * 2006-05-20 2014-07-24 Electrolux Home Products Corporation N.V. Induktionskochfeld
ES2310961B1 (es) * 2006-11-28 2009-10-23 Bsh Electrodomesticos España, S.A. Disposicion de dispositivo de calentamiento.
IT1397286B1 (it) * 2009-12-01 2013-01-04 Indesit Co Spa Piano cottura a induzione.
CN106489297B (zh) * 2014-08-26 2019-12-31 伊莱克斯家用电器股份公司 感应加热装置、用于操作感应加热装置的方法以及感应灶具
EP2991445B1 (de) 2014-08-26 2020-03-25 Electrolux Appliances Aktiebolag Induktionserhitzungseinrichtung, Verfahren zum Betreiben einer Induktionserhitzungseinrichtung sowie Induktionskochfeld
ES2619114B1 (es) * 2015-12-22 2018-04-10 Bsh Electrodomésticos España, S.A. Campo de cocción por inducción

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