EP3352529A1 - Table de cuisson - Google Patents

Table de cuisson Download PDF

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Publication number
EP3352529A1
EP3352529A1 EP18151172.6A EP18151172A EP3352529A1 EP 3352529 A1 EP3352529 A1 EP 3352529A1 EP 18151172 A EP18151172 A EP 18151172A EP 3352529 A1 EP3352529 A1 EP 3352529A1
Authority
EP
European Patent Office
Prior art keywords
transmission
coils
hob
hob according
coil
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.)
Granted
Application number
EP18151172.6A
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German (de)
English (en)
Other versions
EP3352529B1 (fr
Inventor
Wolfgang Thimm
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.)
EGO Elektro Geratebau GmbH
Original Assignee
EGO Elektro Geratebau GmbH
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Publication date
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Publication of EP3352529A1 publication Critical patent/EP3352529A1/fr
Application granted granted Critical
Publication of EP3352529B1 publication Critical patent/EP3352529B1/fr
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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
    • 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

Definitions

  • the invention relates to a hob with a hob plate and at least one heating device arranged thereon or below, advantageously with a plurality of heating devices.
  • an induction hob is known with a cooktop panel under which a plurality of induction heating coils are arranged. These cover an area which substantially corresponds to that of the cooktop panel or at least one heating area of the cooktop panel.
  • a cooking vessel of any size can be placed anywhere on the hob plate and can be heated there with a predetermined by an operator performance.
  • induction hobs are made of EP 1688018 B1 and the EP 2420105 B1 known with a variety of induction heating coils, for example, in a regular arrangement with about 8 x 10 induction heating coils, with which it is also possible to set up a cooking vessel at almost any location on a hob plate and there to heat appropriately.
  • the cost of providing such a large number of induction heating coils, which must be individually controllable and must also be adjustable in their performance, is predictably very large.
  • the invention has for its object to provide an aforementioned cooktop, can be solved with the problems of the prior art and with which it is particularly possible, not only in an energy directly from an excitation coil or Indutationswespule in size and size Introduce cooking vessel, but also in a cooking vessel, which is placed in particular in the lateral direction a piece to the coil on a hob plate.
  • the hob has a hob plate, advantageously a flat hob plate made of hard glass or glass ceramic, on or below the at least one heating device is arranged, advantageously a plurality of heating devices.
  • the heating devices cover a substantial area of the hob plate or at least the essential area of a heating area of the hob plate on which cooking vessels can be set up for heating.
  • the heaters cover up to a small distance directly adjacent to each other, this area, preferably if they are induction heating coils. In particular, such a distance can be between 1 mm and 20 mm, particularly advantageously between 5 mm and 15 mm.
  • a flat extended transmission device under the cooktop panel or between the at least one heating device and the cooktop plate, a flat extended transmission device is provided.
  • the areal extent of the transfer device means that it covers a considerably larger area than a single heating device or induction heating coil itself, at least partially covering it, in particular completely and / or far superior.
  • the transfer device has a planar extension which corresponds approximately to that of the hob plate or at least its prescribed heating range.
  • the transmission device can mark or specify the area with its areal extent in which cooking vessels can be set up for heating or cooking on the hob plate.
  • the transmission device has a plurality of inductively coupled to each other oscillatory circuits, which are responsible for the transmission of energy.
  • Each of the inductively coupled oscillation circuits has a transmission coil and a transmission capacity, so that an LC oscillation circuit is formed.
  • inductive energy generated by an induction coil or Indu Wegswespule for heating a cooking vessel can be transmitted very well and largely lossless inductively to a cooking vessel.
  • this cooking vessel does not have to be directly in overlap with the induction heating coil, but a partial overlap may suffice or it may also be possible that the cooking vessel does not cover the induction heating coil or its surface at all.
  • the transmission device by means of the transmission device, a lateral energy transfer take place.
  • the transmission coils or the resonant circuits essentially run in a surface or plane which is parallel to the hob plate. Within this surface or plane energy is then transmitted inductively.
  • operating elements and / or displays can be electrically supplied, controlled and / or evaluated by means of the transmission device.
  • resonant circuits in particular the transmission coils or an electrical connection between a transmission coil and a transmission capacity
  • relays and on the other hand semiconductor switches can be used.
  • a switchability can be achieved that a resonant circuit is so to speak deactivated and an energy transfer does not take place beyond him. This can provide a more targeted energy transfer to a location where a cooking vessel located on the hob plate has been detected.
  • all resonant circuits or all transmission coils are identical. In particular, they are also identical or arranged in the same direction.
  • the electrical properties be equal to the respective resonant circuits and in particular the transmission coils, including the transmission capacities.
  • the transmission coils may have a substantially rectangular shape, in particular be square. They can only be slightly rounded at the corners inside and outside for improved power management and easier manufacturability.
  • a transmission coil may have at least one turn, which consists of a flat conductor track, in particular a flat copper track.
  • Their width can be between 5 x and 100 x as large as their thickness.
  • a width of the winding may be between 2% and 10% of the diameter of the transmission coil, in particular between 3% and 7%.
  • a width of the winding is relatively large compared to the diameter, in particular compared to other inductive coils.
  • this also serves to be able to keep a height of the transmission device is relatively low, so that a required height in the induction hob below the hob plate is not too large.
  • a transmission coil having a plurality of turns advantageously a maximum of five turns. Particularly advantageous are at most three turns in a multi-turn transmission coil.
  • the windings then run in areas which are substantially parallel to the area in which the transmission coils run as a whole or which is covered by the transmission device. The turns thus run helically over each other. Due to the smallest possible height or thickness of the winding of the transmission coils results here even including an insulating material between the superimposed turns only a total of relatively low height of a transmission coil.
  • the transmission coils extend in a common area and each have a small distance from each other. Gaps between the transmission coils should be a maximum of 5 mm wide, preferably a maximum of 2 mm. So a good surface coverage is possible and above all by the small distance a good energy transfer.
  • the transmission coils can largely cover or form the planar extent of the transmission device. If the transmission coils consist of bare conductor material as interconnects, for example as a copper track, so can be provided in the lateral direction between them an insulating material to avoid possible short circuits. This can also be achieved, for example, by sandwiching the flat transmission coils between two layers of plastic material, in particular plastic film. These can be laminated together, so that between two adjacent transmission coils, the material of the plastic films, which may be glued or fused together to secure the position and for electrical insulation against each other.
  • the transmission coils can be arranged side by side in such a way that they largely cover the surface of the transmission device.
  • a transmission coil can thus have around or along each straight outside with a small distance other transmission coils.
  • adjacent transmission coils could even overlap, for example by running in different planes.
  • An overlap can be between 1% and 10% of the diameter of the transmission coil, in particular between 3% and 7%, or between 1 mm and 20 mm.
  • the transmission coils are rectangular and close only at the corners and have close proximity to each other, almost abut each other or something here overlap as previously described. Then, so to speak, free areas between the transmission coils are formed or in a narrow grid only every second grid space is occupied by a transmission coil.
  • a drive for the at least one induction coil can be designed for a frequency between 17 kHz and 100 kHz, in particular between 20 kHz and 50 kHz. Then then the energy transfer of the transmission coils to be optimized, this can essentially correspond to a conventional frequency range for induction hobs. This can then be used on conventional frequencies that are generated and handled in an induction hob, so that the existing modules can be used. Compared to the aforementioned prior art, these relatively low frequencies can be advantageously achieved by changing the capacity of the L-C resonant circuits.
  • the transmission capacities of the LC resonant circuits are formed as SMD capacitors, in particular as SMD ceramic capacitors. This can improve energy efficiency and transmission efficiency.
  • a transmission device not or not only used for energy transfer to offset to an induction heating coil cooking vessels are used, but also for controlling displays or optical signal means, in particular LED, which can be arranged at any point below the hob plate. It can be connected as a kind of electrical load to a resonant circuit and be supplied with energy for lighting or be controlled in substantially any desired and known manner.
  • each having at least one LED can be controlled by appropriate control or supply of energy into the transmission device, for example by means of a Indu Wegswespule or by a separate excitation coil, and by tuning the frequency of the desired resonant circuit of a particular LED so that it lights up .
  • a resonant circuit with an LED connected or coupled thereto may have a specific resonant frequency.
  • variable-frequency control of the transmission device then a specific LED can be selectively controlled.
  • a sensor is connected.
  • this is a capacitive touch sensor, as it is known, for example, for controls on a hob plate, see for example the EP 859467 A2 .
  • capacitive touch sensors in particular capacitive touch sensors or even temperature sensors with a temperature-dependent resistance value, resonant frequencies of a resonant circuit can be differently influenced or detuned. This can then be detected at an energy input or control of the transmission device, in particular on an induction heating coil or an aforementioned excitation coil.
  • a surface distributed temperature detection can take place or several distributed over the hob plate contact sensors can be queried or operated as controls.
  • the resonant circuit is detuned or the resulting inductive coupling changes the effective resistance. This taps the power at the location where this detuning occurs.
  • the effective resistance of an induction heating coil when placing a cooking vessel changes from 0.025 ohms through the inductive coupling to about 5 ohms.
  • any hob is provided with such a transfer device under a hob plate, such as a gas hob. Then at least one prescribed excitation coil is necessary for the transmission device.
  • the transmission device should then not be provided here for inductive energy transmission, but for the control and / or evaluation of the aforementioned optical signal means or LED or touch sensors of controls. Then just a separate excitation coil for the transmission device is provided.
  • the transfer device is then not used here for the transmission of inductive energy to a cooking vessel placed on the hob, for which then a gas burner would be provided. Rather, it should be different, distributed arranged temperature sensors and / or controls with capacitive touch sensors or the like. can be evaluated.
  • FIG. 1 an induction hob according to the invention as induction hob 11 is shown in simplified form in the lateral section, the induction hob 11 according to conventional design has a hob plate 13, on the underside of a flat housing 15 is arranged.
  • flat induction heating coils 17 are arranged according to the illustration of Fig. 2 , ie with a substantially rectangular basic shape and a small distance from each other. This is for example from the DE 102014224051 A1 which is explicitly referred to in this regard.
  • the induction heating coils 17 rest on a support plate 18. Under the support plate 18, the housing 15 has schematically illustrated units for a drive 19 and a power supply 20.
  • the control 19 also contains a control intelligence for the induction hob 11.
  • Fig. 2 Furthermore, so that from the top view of Fig. 2 recognizable display 23 and controls 25 are controlled and evaluated. This is known per se from the prior art. From the Fig. 2 can be seen in the rear area shown additional controls 26, which are advantageously similar to the controls 25 designed as a capacitive touch switch with capacitive touch sensors. Likewise, dotted round lights 27 are provided between the two rear rows of induction heating coils 17. With these lights 27 their activation state can be displayed, alternatively, for example, a residual heat indicator or the like. will be realized.
  • FIG Fig. 3 shown in plan view. It is like the sectional view of the Fig. 1 already shows, very flat and has, for example, one thin carrier 29, which may even be formed like a film. On this support 29, even as a film, the LC resonant circuits 30 may be applied directly, either by gluing or by direct coating or printing. The person skilled in the corresponding methods are familiar and do not present him any problems. It can be seen that the LC resonant circuits 30 each have a transmission coil 32 and a transmission capacity 34. In the presentation of Fig.
  • the carrier 29 is to be provided with such LC resonant circuits 30 largely over the entire surface, in particular up to the area of the display 23 and the front control elements 25. However, not all are shown for the sake of clarity. In the front region of the induction hob 11 on the display 23 and the operating elements 25, the LC resonant circuits 30 can also be saved.
  • all L-C resonant circuits 30 are identical. As can be seen, they are also the same aligned or arranged. This need not necessarily be so, but has proven to be advantageous for a good energy transfer within the transfer device.
  • the distance between adjacent LC resonant circuits 30 or, in particular, the transmission coils 32 can be relatively small and, for example, between 1 mm and 15 mm, advantageously between 2 mm and 10 mm. This applies both to side by side arranged transmission coils 32 as well as arranged one behind the other. The distance should be so small that they are inductively coupled with each other in any direction. In one embodiment of the invention, it is even conceivable that different transmission coils 32, in particular adjacent, run in different planes and even overlap in plan view, see Fig. 5 ,
  • LC resonant circuit 30 ' In the Fig. 4 is shown in magnification an LC resonant circuit 30 ', as it could be designed in practice. It has a transmission coil 32 ', which consists of a single turn whose coil ends 33' are not completely closed or have a small distance from each other. At these coil ends 33 ', a transmission capacity 34' is connected, this transmission capacity is advantageously a discrete component, such as an SMD component. The capacity can be in the range of ⁇ 1 ⁇ F.
  • An inductance of a single-winding transmission coil 32 ' may be in the range of about 1 ⁇ H.
  • a capacity of the transmission capacity 34 ' may be slightly above 30 ⁇ F for a desired frequency of about 20 kHz and about 15 ⁇ F for a frequency of 30 kHz. The capacities C are then to be selected accordingly.
  • an energy transfer to a lighting 27 takes place.
  • This can have an LED with a resonant circuit that is tuned to a specific resonant frequency. Energy can then be coupled in with the transmission device 28 at a specific frequency, which due to the special resonant frequency of the illumination 27 only illuminates the latter, but not further provided illumination devices with a different resonance frequency. Both types of energy transfer via the above-described Schwingnikvertician.
  • additional controls 26 can be controlled. Especially when these capacitive touch sensors have, which change their capacity on placing a finger on the top of the hob plate 13 and thus detune a resonant circuit, it can be determined via various feedbacks, which of the additional controls 26 so to speak operated and thus detuned. Again, this requires no cumbersome wiring to the respective locations of the additional controls 26, which could cause additional problems due to excessive temperatures due to their arrangement in the heating of the induction hob 11.
  • This energy transfer to a lighting 27 as a display and / or the control of additional controls 26 can also be used in any hob, for example with radiant heating elements or gas burners.
  • the Fig. 5 shows in a simplified representation starting from the 3 and 4 in that, as with a transmission device 128, adjacent transmission coils 132 of LC resonant circuits 130 overlap one another in a simple manner. For this purpose, these are each arranged alternately on an upper side and a lower side of the carrier 129, namely the LC resonant circuits 130 shown in solid lines on an upper side and the LC resonant circuits 130 shown in dashed lines on an underside. Then, an overlap may be in the range of 0.5 cm to 2 cm when the transfer coils 132 have a length and / or width in the range between 10 cm and 30 cm, in particular between 15 cm and 25 cm.
  • the Fig. 6 shows in a simplified representation, as in a transmission device 228 LC resonant circuits 230 or especially the transmission coils 232 are arranged on the support 229 of the transmission device 228, that virtually every second field in a row and in a column is not occupied. Thus, adjacent transmission coils 232 only approximate or converge near one another in their corner regions, which still provides sufficient inductive coupling for the transmission device 228.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)
  • Induction Heating Cooking Devices (AREA)
EP18151172.6A 2017-01-24 2018-01-11 Table de cuisson Active EP3352529B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017201109.2A DE102017201109A1 (de) 2017-01-24 2017-01-24 Kochfeld

Publications (2)

Publication Number Publication Date
EP3352529A1 true EP3352529A1 (fr) 2018-07-25
EP3352529B1 EP3352529B1 (fr) 2021-04-28

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ID=60954943

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18151172.6A Active EP3352529B1 (fr) 2017-01-24 2018-01-11 Table de cuisson

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EP (1) EP3352529B1 (fr)
DE (1) DE102017201109A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021094735A1 (fr) * 2019-11-11 2021-05-20 Metaboards Ltd Résonateurs électriques

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021207534A1 (de) 2021-07-15 2023-01-19 E.G.O. Elektro-Gerätebau GmbH Geschirrspülmaschine, Verfahren zur Steuerung einer Geschirrspülmaschine und Computerprogramm sowie Datenträger

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1858300A1 (fr) * 2006-05-20 2007-11-21 Electrolux Home Products Corporation N.V. Champ de cuisson à induction
WO2009027674A1 (fr) * 2007-08-28 2009-03-05 Access Business Group International Llc Alimentation inductive
EP2385311A2 (fr) * 2010-05-03 2011-11-09 BSH Bosch und Siemens Hausgeräte GmbH Elément de commande pour un poste de travail ménager, poste de travail ménager et système constitué du poste de travail ménager et de l'élément de commande
EP2428733A1 (fr) * 2009-05-04 2012-03-14 LG Electronics Inc. Appareil de cuisson et procédé de commande associé
DE102012201808A1 (de) * 2012-02-07 2013-08-08 BSH Bosch und Siemens Hausgeräte GmbH Kochfeldanordnung, Tisch mit einer Kochfeldanordnung und Verfahren zum Betreiben einer Kochfeldanordnung

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0859467B1 (fr) 1997-02-17 2002-04-17 E.G.O. ELEKTRO-GERÄTEBAU GmbH Commutateur à effleurement avec capteur à touche
FR2863039B1 (fr) 2003-11-27 2006-02-17 Brandt Ind Procede de chauffage d'un recipient pose sur une table de cuisson a moyens de chauffage associe a des inducteurs
ES2362782B1 (es) 2009-04-17 2012-05-22 Bsh Electrodomésticos España, S.A. Campo de cocción con una disposición de detección y procedimiento para accionar un campo de cocción.
GB201110273D0 (en) 2011-06-17 2011-08-03 Isis Innovation Magneto-inductive waveguide
GB2517987A (en) 2013-09-09 2015-03-11 Isis Innovation Waveguide
DE102014224051A1 (de) 2014-11-25 2016-05-25 E.G.O. Elektro-Gerätebau GmbH Induktionskochfeld und Verfahren zur Steuerung eines Induktionskochfelds
DE102015210650A1 (de) 2015-06-10 2016-12-15 E.G.O. Elektro-Gerätebau GmbH Induktionsheizeinrichtung und Induktionskochfeld mit einer solchen Induktionsheizeinrichtung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1858300A1 (fr) * 2006-05-20 2007-11-21 Electrolux Home Products Corporation N.V. Champ de cuisson à induction
WO2009027674A1 (fr) * 2007-08-28 2009-03-05 Access Business Group International Llc Alimentation inductive
EP2428733A1 (fr) * 2009-05-04 2012-03-14 LG Electronics Inc. Appareil de cuisson et procédé de commande associé
EP2385311A2 (fr) * 2010-05-03 2011-11-09 BSH Bosch und Siemens Hausgeräte GmbH Elément de commande pour un poste de travail ménager, poste de travail ménager et système constitué du poste de travail ménager et de l'élément de commande
DE102012201808A1 (de) * 2012-02-07 2013-08-08 BSH Bosch und Siemens Hausgeräte GmbH Kochfeldanordnung, Tisch mit einer Kochfeldanordnung und Verfahren zum Betreiben einer Kochfeldanordnung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021094735A1 (fr) * 2019-11-11 2021-05-20 Metaboards Ltd Résonateurs électriques

Also Published As

Publication number Publication date
DE102017201109A1 (de) 2018-07-26
EP3352529B1 (fr) 2021-04-28

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