EP3606285B1 - Verfahren zur ansteuerung von induktionsheizspulen eines induktionskochfelds - Google Patents

Verfahren zur ansteuerung von induktionsheizspulen eines induktionskochfelds Download PDF

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Publication number
EP3606285B1
EP3606285B1 EP19186794.4A EP19186794A EP3606285B1 EP 3606285 B1 EP3606285 B1 EP 3606285B1 EP 19186794 A EP19186794 A EP 19186794A EP 3606285 B1 EP3606285 B1 EP 3606285B1
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EP
European Patent Office
Prior art keywords
induction heating
power
heating coil
prespecified
operator
Prior art date
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Active
Application number
EP19186794.4A
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German (de)
English (en)
French (fr)
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EP3606285A1 (de
Inventor
Gabriel Rupp
Aylin Schoeffler
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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Priority to PL19186794T priority Critical patent/PL3606285T3/pl
Publication of EP3606285A1 publication Critical patent/EP3606285A1/de
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Publication of EP3606285B1 publication Critical patent/EP3606285B1/de
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
    • H05B6/065—Control, e.g. of temperature, of power for cooking plates or the like using coordinated control of multiple induction coils
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • 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
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/03—Heating plates made out of a matrix of heating elements that can define heating areas adapted to cookware randomly placed on the heating plate
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/05—Heating plates with pan detection means

Definitions

  • the invention relates to a method for controlling induction heating coils of an induction hob, in particular in order to be able to resolve so-called conflicts between two cooking vessels set up above a common induction heating coil for which different target powers are specified for heating.
  • the cooking vessel with the higher predetermined nominal power may then be heated too little in the area above the common induction heating coil.
  • the cooking vessel with the lower predetermined nominal power may then be heated too much in the area above the common induction heating coil.
  • the second case in particular is very disadvantageous, since undesired behavior can occur here, for example food to be cooked burning.
  • Such an induction hob is, for example, from DE 10 2006 054 973 A1 known.
  • the invention is based on the object of creating a method mentioned at the beginning with which problems of the prior art can be solved and in particular it is possible to be able to heat two cooking vessels set up over a common induction heating coil with different predetermined target powers, preferably as user-friendly as possible without creating serious problems for one of the cooking vessels or their cooking process.
  • the method for controlling induction heating coils of an induction hob it is determined in a preceding step whether two cooking vessels, each with a minimum coverage, are placed on the induction hob over a common induction heating coil.
  • different target powers are specified with which they are to be heated.
  • a target power is not specifically specified for precisely one induction heating coil, but rather for precisely one cooking vessel, so to speak. This nominal power then applies to this cooking vessel, and thus also to all induction heating coils that cover the cooking vessel with the mentioned minimum coverage and by which it is heated. If the same target power is specified for the two cooking vessels, no conflict occurs, and the common induction heating coil can also be operated according to this target power.
  • no fixed power values are specified for induction heating coils, but area power densities, which in the present case should not make any difference to the considerations made here. There is always talk of performance.
  • the common induction heating coil is then operated with a so-called reducing power.
  • This reduction power is lower than the higher specified target power. It is advantageously at least the lower specified target power.
  • This reduction in the power at the common induction heating coil which then applies above all to the cooking vessel with the higher specified target power, is passed on to an operator signaled optically and / or acoustically.
  • the common induction heating coil is actually operated with the reduction power and thus heats the two cooking vessels that have been set up. However, it only heats the overlapping areas of the cooking vessels that have been set up.
  • the reduction in power is clearly indicated to the operator so that he or she perceives the process of reduction and can, if necessary, intervene within the scope of the invention.
  • the counting of a predetermined decision time begins. This is advantageously done by a counter, in particular in a control of the induction hob, which carries out the method.
  • the counting of the decision time as a kind of sequence is signaled to the operator optically and / or acoustically. This signaling can also correspond to the aforementioned signaling of the reduction per se or it can even be one and the same signaling.
  • the elapsing time can be displayed particularly advantageously.
  • the predetermined decision time can advantageously be 3 seconds to 20 seconds, particularly advantageously 5 seconds to 10 seconds.
  • the elapsed time can for example be displayed in seconds, that is, every second, which is a good illustration for the operator.
  • a first case the operator does not react at all during the decision time. This can be due to the fact that she agrees to the reduction of the power at the common induction heating coil to the reduction power. One can then assume that this reduction, although not what was originally desired, is acceptable and can therefore be maintained. It can also be due to the fact that the operator has left the room or is no longer present, in which case he or she has to accept this reduction.
  • the operator reacts during the decision time, that is, before it expires. This is especially the case if the operator does not agree to the reduction of the power on the common induction heating coil.
  • the operator either removes one of the cooking vessels from the common induction heating coil as the first sub-case in such a way that this cooking vessel no longer covers this induction heating coil with the minimum coverage, advantageously no longer covers it at all. The conflict would then be resolved.
  • the operator changes at least one of the specified target powers for the set-up cooking vessels in response during the decision time before it expires, such that the two now predetermined target powers differ by a maximum of a predetermined tolerance difference.
  • this tolerance difference can be a zero difference, so that the two specified target outputs no longer differ. Then the conflict is resolved by canceling the Difference in the specified target performance.
  • the two specified target powers differ only relatively slightly, for example by 5% to a maximum of 50% of the lower predetermined target power. This is then considered to be acceptable, in particular for the cooking vessel with the lower specified target output. Even then, the conflict is resolved by changing the performance setting, because the difference between the specified target performance is now relatively small and acceptable.
  • the common induction heating coil is operated continuously with a reduced actual power in order to heat the cooking vessels that are still in place.
  • This reduced actual output can correspond to the aforementioned reduction output, but it is advantageous again to be somewhat lower. This is explained in more detail below.
  • the operator moves at least one of the cooking vessels away from the common induction heating coil, in such a way that the minimum coverage for this is no longer given or the cooking vessel is completely removed from the common induction heating coil, i.e. via at least one other induction heating coil is placed, the remaining cooking vessel is heated again by the previously common induction heating coil with the target power originally specified for this cooking vessel.
  • the cooking vessel that has been moved away can then either be automatically heated at a new location with its specified target power; alternatively, an operator input can be necessary for this and requested accordingly.
  • the decision time is to be selected to be correspondingly short, as has been explained above.
  • the operator is given the opportunity to resolve the conflict in different ways, after having been made aware of it.
  • a state is created that can last for this decision time. If the operator does not react accordingly or does not resolve the conflict, a power is set for the common induction heating coil after the decision time, with which it can be operated continuously to heat both cooking vessels that have been set up, without any significant disadvantages for one of the cooking processes can.
  • the level of the reduction power depends on how small the lower predetermined target power of one of the power units is in absolute terms Cooking vessels is. It can also be taken into account how great the difference is between the two different specified target outputs.
  • the counting can be visually indicated to the operator as the end of the decision time, in particular by a decreasing or increasing number.
  • a decision time 10 seconds can be shown.
  • a two-digit, seven-segment display can show a significantly longer decision time, although it should advantageously not exceed 20 seconds. Otherwise, one of the cooking processes can be negatively affected by the reduced reduction power.
  • a progress bar that is to say by a large number of light segments arranged in a row. This is suitable for an even better intuitively comprehensible representation.
  • Such a progress bar can be displayed as operating elements with an illuminated slider, as is shown, for example, in the EP 1787393 A1 are known.
  • the removed cooking vessel can not only be further heated by the at least one other induction heating coil in general with its originally specified target power, but this can also take place automatically.
  • no further input or action by the operator is necessary; simply moving this cooking vessel away from the other cooking vessel or away from the common induction heating coil is then completely sufficient.
  • a confirmation as an operating process can be requested from the operator for further heating with the originally specified target output.
  • the reduction power for the common induction heating coil or for the cooking vessel with the higher specified target power can be reduced to such an extent that it corresponds to the lower specified target power.
  • the cooking vessel with the higher power is then also heated by this induction heating coil only with the lower specified target power, but only once for a limited time.
  • This reduction performance according to the The lower specified target power can then also be used permanently for the common induction heating coil in the first case mentioned at the outset. If the corresponding reduction on the cooking vessel with the higher specified target output is disruptive for the operator, he or she can still resolve the conflict afterwards, in particular by moving one of the two cooking vessels.
  • the reduction power for the common induction heating coil or with which the cooking vessel is then heated with the higher specified target power from this induction heating coil can be reduced to 120% to 150% of the lower specified target power .
  • the permanently reduced actual power in accordance with the first case mentioned at the beginning is higher than the lower predetermined target power. It can correspond to the reduction power described above, but does not have to be. It is particularly advantageous between the reduction power and the lower specified target power, since the cooking process now lasts for an indefinite or unpredictable time and it should be less affected in the case of the cooking vessel with the lower specified target power than that of the other cooking vessel .
  • the permanently reduced actual power can, for example, be exactly in the middle, but it should advantageously be a maximum of 10% to 15% above the lower specified target power.
  • the permanently reduced actual output is the lower specified target output.
  • the cooking process with the lower desired power is not impaired at all. An impairment of the other cooking process will then usually lead to the operator resolving the conflict by removing one of the cooking vessels.
  • the minimum coverage mentioned at the outset is at least 5% of the area of the induction heating coil. Smaller coverage by a cooking vessel can possibly be recorded, but will not be counted as such. This means that a cooking vessel with this low coverage below this minimum coverage or less than this may be heated somewhat by the induction heating coil in the overlapping area. However, this is not taken into account when operating the induction heating coil, and because of the likely low share in the heating of the cooking vessel this is still considered acceptable.
  • the minimum coverage can also be higher, for example 10% to a maximum of 15%.
  • the induction hob does not take any action of its own, but at least informs the operator about this certain conflict. With this information, it can advantageously also be indicated for which cooking vessel and / or for which induction heating coil this conflict case applies.
  • the common induction heating coil with the lower predetermined Target power is operated. This is because it can then be assumed that the reduced power is also acceptable for the cooking vessel with the higher specified target power.
  • the predefined tolerance difference can be 5% to 50% of the lower predefined setpoint power. It is advantageously a maximum of 10% or 20% of the lower specified target power.
  • An advantageous visual signaling is blinking, which is particularly suitable for attracting the attention of an operator.
  • a number mentioned at the beginning or a progress bar mentioned at the beginning can be displayed flashing.
  • the flashing can also take place every second, for example by changing the number or progress bar. But it can also be done faster.
  • a conflict is displayed on a power display for the cooking vessel with the higher specified target power, so that an operator is shown that the conflict should be resolved by removing or relocating this cooking vessel.
  • a conflict display can take place with a changed luminosity and / or with the power display flashing. In this case, the cooking vessel with the higher specified target power is viewed as more disruptive and should therefore be removed.
  • FIG. 1 is a plan view of an induction hob 11 described at the outset for carrying out the method according to the invention, which has a hob plate 12.
  • the rear and by far the largest part of the hob plate 12 forms a heating area 13 in order to be able to heat cooking vessels or pots that have been set up therewith.
  • Eight induction heating coils 15 are arranged below the heating area 13, here denoted HE10 to HE23.
  • the left half of the heating area 13 has four induction heating coils 15 and the right half as well. However, this division is not absolutely necessary; fewer and, above all, even more induction heating coils could be provided for the entire heating area 13.
  • a very large pot T1 is placed on the front left of the induction hob 11. It largely covers the two front induction heating coils HE10 and HE13 and about 30% each of the two rear induction heating coils HE11 and HE12. At the back in the middle there is a much smaller pot T2, approximately in the middle between the two induction heating coils HE12 and HE21.
  • a minimum coverage mentioned at the beginning can be set at 10%, and since it is clearly exceeded by the two pots T1 and T2 at the induction heating coil HE12, both pots should be heated and must be taken into account.
  • pot T3 is shown in dashed lines at the front right in the heating area 13. This only covers the right rear induction heating coil HE22 by about 10%, so it could possibly still be relevant here.
  • the induction heating coil HE21 which is covered by the pot T2 with significantly more than the minimum coverage, covers the pot T3 with only about 2% to 4%. It is thus clearly below the minimum coverage or is less than this, so that here in an advantageous variant of the invention described at the beginning it is provided that the pot T3 is viewed as not covering at all for the operation of the induction heating coil HE21.
  • the induction hob 11 has an operating device 17, advantageously arranged under the same hob plate 12 and implemented with touch switches, advantageously with capacitive sensor elements and illuminated displays or LEDs.
  • the operating device 17 has four horizontally running so-called sliders 19a to 19d in a special distribution, which, however, does not play a significant role here.
  • Each slider has ten light segments 20, a separate sensor element also being provided on each light segment 20.
  • Such a slider 19 is thus a type of illuminated touch strip.
  • a display 21 is arranged to the right of each slider 19, so four displays 21a to 21d are also provided.
  • the displays 21 each have two seven-segment displays for displaying corresponding numbers and letters or symbols, as shown in the following Figs. 2 to 4 is easy to see.
  • the target power is set at power level 9 on the lower left slider 19a.
  • the power specification or power setting in stages is common for hobs. This can be done by swiping a finger above the slider 19a, alternatively via direct operation. If, in the case of the slider 19a, a finger is placed over the second luminous segment 20a from the right, which is the ninth luminous segment viewed from the left, then the power level 9 can also be set directly. In any case, the right digit display 21a shows the power level 9 by lighting, advantageously by constantly lighting.
  • the nine left-hand light segments 20a light up on the slider 19a itself and thus also illustrate the set high power level as the target power for the pot T1.
  • a setpoint power is set for the rear smaller pot T2, but here as a significantly lower power level 3.
  • the three left-hand light segments 20b light up on the slider 19b.
  • the right seven-segment display on the display 21b shows the number 3.
  • the method according to the invention thus begins, and the common induction heating coil HE12 is in any case not operated with the higher setpoint power. Rather, here is one Variant in the Fig. 3 shown, in which the common induction heating coil HE12 is operated with the reducing power according to the invention. However, the reduction power here with the power level 4 shown on the right of the two displays 21a and 21b is above the lower specified target power corresponding to power level 3 of the pot T2. As explained at the outset, the method could alternatively also provide for the lower specified target power to be used in accordance with power level 3.
  • the letter "C” representing "Conflict” is displayed on the two displays 21a and 21b with the seven-segment display on the left.
  • This advantageously also takes place in a flashing manner, so that the operator's attention is drawn in all cases to the fact that the originally desired cooking is not taking place or cannot take place here with the specified target output.
  • An acoustic signaling also advantageously takes place, in particular when the common induction heating coil HE12 is actually operated with the reducing power, as are the other covered induction heating coils of the pots T1 and T2.
  • a predetermined decision time begins to run or is counted on a counter in the mentioned control of the induction hob 11. It is advantageously chosen here to be 10 seconds. The expiry of this decision time should be visually displayed to an operator, this is in the Fig. 4 made clear. In each case on the left it is shown how only ten of these light segments light up on a slider 19 with the ten light segments 20, as shown at the very top. Then only nine light segments light up, then eight light segments 20, etc. It is advantageous to extinguish a further light segment every second so that the decision time is optically counted down.
  • the numerical counting of the decision time can be displayed on the display 21 with the seven-segment displays as a kind of countdown. At the very bottom, when no more light segment 20 lights up in the slider 19 shown on the left, a "0" would then light up accordingly on the right. But since it is advantageous accordingly Fig. 3 the display 21 shows the conflict display as well as the actual one The power currently used corresponds to the reduction power, the decision time is advantageously counted optically on the slider 19. The expiry of the decision time can according to the Fig. 4 can also be shown by flashing on the slider 19 or on its luminous segments 20 and / or on the display 21.
  • the operator can now react as described above. However, if it does not react at all within the decision time, the common induction heating coil HE12 is operated continuously with a reduced actual power. In this example, this would be the lower predetermined target power corresponding to power level 3. The other induction heating coil HE21 covered by pot T2 would then also be operated with this reduced actual power corresponding to the lower predetermined target power anyway.
  • the other covered induction heating coils HE10, HE11 and HE13 that they are operated with the originally specified target power corresponding to power level 9. Then at the top right of the pot T1 there will be significantly less heating with the reduced actual output corresponding to the lower specified target output. The operator could accept this or would have to intervene after all. The ongoing conflict could then also continue to be displayed, for example, continue to be indicated by the letter "C" Fig. 3 . Alternatively, these three induction heating coils are also operated with reduced power in order not to cause such large different heat inputs within the pot T1.
  • the pot T1 was not moved, and since the conflict on the common induction heating coil HE12 has been eliminated, it can in any case be heated by all four induction heating coils HE10 to HE13 with the originally specified target power corresponding to power level 9. This is in Fig. 6 on the lower slider 19a and the lower display 21a also shown accordingly.
  • the operator has reacted by moving one of the pots, and the moved pot T2 is also automatically heated with the originally specified target power by the two induction heating coils HE21 and HE22, which are now covered, without any further operator input required.
  • the power for the pot T1 After resolving the conflict case accordingly Fig. 5 by moving the pot T2, the power for the pot T1 also jumps again from the reducing power Fig. 3 to the originally specified target performance accordingly Fig. 2 .
  • no operator input is necessary for this either.
  • Fig. 1 Change one of the specified target powers for the pot T1 or the pot T2 so that there is a maximum of a predetermined tolerance difference as a difference.
  • the operator specifies a power level 3 for one of the pots and a power level 4 for the other pot as the respective setpoint power, independently of the originally specified nominal power.
  • the common induction heating coil could either be operated with an intermediate actual power, or alternatively with the lower specified target power. This would then have less of an impact on the pot with the higher specified target power, mainly because with these relatively small power differences the other induction heating coils that are covered by the pot can be operated with the originally specified target power. This case is not shown in the drawing here, but it is easy to imagine.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Induction Heating Cooking Devices (AREA)
EP19186794.4A 2018-07-30 2019-07-17 Verfahren zur ansteuerung von induktionsheizspulen eines induktionskochfelds Active EP3606285B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL19186794T PL3606285T3 (pl) 2018-07-30 2019-07-17 Sposób sterowania indukcyjnymi cewkami grzewczymi indukcyjnej płyty kuchennej

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018212675.5A DE102018212675B4 (de) 2018-07-30 2018-07-30 Verfahren zur Ansteuerung von Induktionsheizspulen eines Induktionskochfelds

Publications (2)

Publication Number Publication Date
EP3606285A1 EP3606285A1 (de) 2020-02-05
EP3606285B1 true EP3606285B1 (de) 2021-09-29

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EP (1) EP3606285B1 (es)
KR (1) KR102752866B1 (es)
DE (1) DE102018212675B4 (es)
ES (1) ES2901643T3 (es)
PL (1) PL3606285T3 (es)

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Publication number Priority date Publication date Assignee Title
WO2022093132A1 (en) * 2020-10-06 2022-05-05 Mamur Teknoloji Sistemleri San. A.S. A cooking device with touch sensitive slider
JP2024506643A (ja) * 2021-02-10 2024-02-14 グラフェン・スクエア・インコーポレイテッド 可変型加熱装置

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Publication number Priority date Publication date Assignee Title
DE102004044355A1 (de) 2004-09-09 2006-03-30 E.G.O. Elektro-Gerätebau GmbH Verfahren zur optischen Kennzeichnung eines Berührungsschalters und ein solcher Berührungsschalter
DE102006054973A1 (de) 2006-11-15 2008-05-29 E.G.O. Elektro-Gerätebau GmbH Induktive Kochzone, Induktionskochfeld und Ansteuerverfahren
ES2331037B1 (es) 2007-10-25 2010-09-21 Bsh Electrodomesticos España, S.A. Campo de coccion y procedimiento para el accionamiento de un campo de coccion.
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.
KR101844405B1 (ko) * 2011-04-08 2018-04-03 삼성전자주식회사 유도가열조리기 및 그 제어방법
DE102014110026B4 (de) * 2014-07-17 2016-12-22 Miele & Cie. Kg Verfahren zum Betreiben einer Kochfeldeinrichtung und Kochfeldeinrichtung
DE102015118453B4 (de) * 2015-10-29 2017-11-16 Miele & Cie. Kg Verfahren zum Betreiben einer Kochfeldeinrichtung

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ES2901643T3 (es) 2022-03-23
PL3606285T3 (pl) 2022-02-14
EP3606285A1 (de) 2020-02-05
DE102018212675A1 (de) 2020-01-30
DE102018212675B4 (de) 2020-02-06
KR20200013596A (ko) 2020-02-07
KR102752866B1 (ko) 2025-01-09

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