EP3307019A1 - Procédé de fonctionnement d'un champ de cuisson à induction et champ de cuisson à induction - Google Patents

Procédé de fonctionnement d'un champ de cuisson à induction et champ de cuisson à induction Download PDF

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Publication number
EP3307019A1
EP3307019A1 EP17192545.6A EP17192545A EP3307019A1 EP 3307019 A1 EP3307019 A1 EP 3307019A1 EP 17192545 A EP17192545 A EP 17192545A EP 3307019 A1 EP3307019 A1 EP 3307019A1
Authority
EP
European Patent Office
Prior art keywords
power density
cooking vessel
controller
state
heating 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
EP17192545.6A
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German (de)
English (en)
Other versions
EP3307019B1 (fr
Inventor
Christian Egenter
Marcus Frank
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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Filing date
Publication date
Application filed by EGO Elektro Geratebau GmbH filed Critical EGO Elektro Geratebau GmbH
Priority to PL17192545T priority Critical patent/PL3307019T3/pl
Publication of EP3307019A1 publication Critical patent/EP3307019A1/fr
Application granted granted Critical
Publication of EP3307019B1 publication Critical patent/EP3307019B1/fr
Active legal-status Critical Current
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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
    • 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
    • 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
    • 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
    • H05B2213/07—Heating plates with temperature control means

Definitions

  • the invention relates to a method for operating an induction hob to heat water or a similar liquid in a cooking vessel set up above at least one induction heating coil of the induction hob. Furthermore, the invention relates to an induction hob, which is designed to perform this method.
  • the invention has for its object to provide an aforementioned method and trained to carry out induction cooking, with which problems of the prior art can be solved and it is particularly possible to provide more comfort functions or operating functions for operating an induction cooktop.
  • the method in particular to be able to heat water or a corresponding liquid in the set-up cooking vessel with different degrees of boiling, has the following steps.
  • a control of the induction hob controls the at least one induction heating coil for inductive heating of the cooking vessel, which is placed above the induction heating coil. It is heated with a given power density, ie a certain power per area.
  • a given power density ie a certain power per area.
  • This can be a high power density, for example, higher than 4 W / cm 2 to 6 W / cm 2 , possibly also a maximum or boost power density of up to 12 W / cm 2 .
  • This power density can be specified by an operator.
  • a particular mode of operation such as "boiling water", which can be selected on the induction hob, it can be automatically and program dictated by the control of the induction hob as it were.
  • operating parameters of the at least one induction heating coil are detected by the controller.
  • an oscillation response of the induction heating coil is used as the operating parameter.
  • This operating parameter or these operating parameters are evaluated in order to detect or monitor a relative temperature profile of the temperature of the cooking vessel bottom. This is also known from the prior art.
  • the controller recognizes this as the case of a state of "light boiling" of the water or liquid in the cooking vessel. Further, it is then determined that a temperature has been reached at the top of the cooking vessel bottom that is 5 ° C to 15 ° C below the boiling point of the water.
  • this boiling point is related to a usual height in Germany above the sea level, ie about 20m to 500m above sea level. This altitude range affects the boiling point only insignificantly and can therefore be neglected.
  • this height is entered above the sea level in the induction hob, for example, during the first installation or during the first startup. Then the controller takes into account its effects on the boiling point.
  • the approximate relative temperature curve will always be reasonably the same regardless of the altitude.
  • the absolute temperature at the start of the "light boiling" state will vary and be lower as the induction hob is operated above sea level. However, this usually only has a certain effect at a height of more than 1000 m above sea level, namely around 5 ° C.
  • An increase in the relative temperature history of the saucepan bottom may take some time, especially 10 seconds to 300 seconds or 400 seconds Sec. Of course, this depends on the given power density. If this is very high or maximum, in particular using a so-called boost power density for operating the at least one induction heating coil, the duration may also be in the range between 60 seconds and 150 seconds.
  • the power density is automatically reduced for a predetermined hold time.
  • the power density can be advantageously reduced to a value between 1 W / cm 2 and 3.5 W / cm 2 . Relatively speaking, the power can be reduced by 10% to 50% or even by 75%, depending on the power density previously used.
  • This holding option is that by operating a control element, advantageously a single control element, which may be particularly advantageous a touch switch, the temperature is controlled by automatically adjusting the power density to that value that prevailed at the time of the start of the hold time .
  • the power density used at the time of the start of the "light boiling” state can be set and kept constant. This may be the power density which has been automatically reduced for the predetermined hold time.
  • the operator when operating the operating element, can leave this "light boiling” state maintained for a long time. By using the possibility according to the invention, it does not need to set this state itself consuming by a power density which leads to this state "easy boiling” in the long term.
  • the holding time can be in the range of a few seconds, advantageously at a maximum of 20 seconds, particularly advantageously a maximum of 10 seconds. If the holding time has elapsed without the operator having selected the holding option or carrying out an actuating operation for the holding option has or any other actuation process for this induction heating coil, with the example, a completely different power density is set manually, so is the default again Power density set. This is a power density that is most likely above the power density that has been automatically reduced during the hold time. Thus, a further heating of the cooking vessel bottom and thus also of the water or the liquid therein will take place again. This may be advantageous for this case if the operator wants to use the water not only in the "light boiling" state, but as "boiling" or bubbling cooking. This is for example advantageous for cooking noodles or is frequently used.
  • such "light boiling” is more likely to be used for cooking potatoes or eggs, and has the advantage of avoiding spillage of hot water during bubbling cooking.
  • some foods can be undesirably strongly mechanically moved or impaired in the preparation by the strong water movements in the cooking vessel or by the strong movements of the resulting vapor bubbles. Also for this reason, a state of "light boiling" may be more desirable.
  • the operator is signaled when the state "light boiling" is reached, ie when a temperature of almost 100 ° C or a temperature between 85 ° C and 100 ° C is reached for the water at which the hold time for the hold option begins.
  • Signaling can be done optically and / or acoustically according to various possibilities which are known to the person skilled in the art. Such a signaling can be particularly advantageous in distinguishing from other signaling, so that the operator can see exactly that now this stop option is offered according to the invention and the holding time has started to run.
  • at least the predetermined power density can be maintained or set again during the first heating of the cooking vessel.
  • an even higher power density can be set, for example also a maximum power density.
  • the water in the cooking vessel can be heated to a higher temperature for a "strong boiling".
  • the water can actually be brought up to 100 ° C or to maximum temperature, so that it boils bubbly.
  • a cooking option is offered for a predetermined KochOptions time, which may be a maximum of 20 sec, possibly even a maximum of only 10 sec Increase in the relative temperature of the cooking vessel bottom stopped by reducing the power density. If, during this cooking option, a control is actuated appropriately by the operator, the controller adjusts the power density on the at least one induction heating coil to maintain this "heavy boiling” condition in the cooking vessel. Thus, it does not necessarily maintain the previously used power density with which this "heavy boiling” condition has been achieved. Namely, maintaining the state may also allow for a lower power density, although it should still be a high power density. For this purpose, it can advantageously be provided that exactly that relative temperature which was present at the time of stopping the temperature increase, that is the target temperature or which must also be at 100 ° C., is regulated. Alternatively, the power density used at that time may be maintained.
  • the achievement of the state "strong boiling” of the water in the cooking vessel can be signaled to the operator generally or specifically. In principle, signaling is similar as previously explained.
  • a reduction of the power density at the at least one induction heating coil for the cooking vessel after the recognition of the state of "light boiling” is used, a first temperature difference between the temperature at the time of detecting the state "light boiling "and a temperature that was 3 seconds to 20 seconds after the beginning of the reduction in power density, in particular during the hold option.
  • the power density at the at least one induction heating coil can rise again or be increased by the controller. In particular, it can to the predetermined power density during the first heating of the water in the cooking vessel increase. This may be a previously described power increase from light boiling to heavy boiling.
  • the power density can be reduced again and a second difference between a temperature at the time of the power density reduction and a temperature after a time between 3 sec and 20 sec after the power density reduction is determined.
  • This second difference is then compared to the first difference.
  • the second difference is smaller than the first difference, it is considered that the relative temperature of the cooking vessel at the time of first reducing the power density does not yet correspond to the state of "high boiling” but only to the state of "low boiling”. , If this condition is desired "light boiling”, then the temperature fits. Then it can be regulated on it. If the condition "strong boiling” is desired, the power density should be increased again for even more heating.
  • the controller shuts off the at least one induction heating coil when the cooking vessel is heated with a power density for maintaining the state of "light boiling" after a maximum of 2 hours.
  • This time can be a maximum of 1 hour, alternatively 5 minutes to 30 minutes, so that this state does not last so long that it is obvious that there is a fault or that the operator does not monitor the cooking process or has in sight ,
  • the at least one induction heating coil is operated at a heating of the cooking vessel with a power density sufficient to maintain the state of "strong boiling". Then it can be switched off after a maximum of 30 minutes. This can only be a maximum of 20 minutes. Finally, a significantly higher power density is set as previously described and thus given a certain higher risk of malfunction. As an alternative to switching off, the power density can be reduced by at least 30% to 60%.
  • the controller sets a medium or rather small power density for the at least one induction heating to keep the state of "easy boiling” or the state of "strong boiling".
  • a power density of less than 4 W / cm 2 may be sufficient, advantageously less than 3 W / cm 2 , to maintain the "light boiling" condition.
  • an operator at an operating device of the induction hob which is of course connected to the controller, either a corresponding predetermined power density selects and then additionally a special function that causes the achievement of the hold option.
  • the controller is designed, possibly after basic operator-dependent programming, when heating a raised cooking vessel and reaching the temperature of nearly 100 ° C or a temperature slightly below the boiling point holding option to offer automatically.
  • the controller is designed, possibly after basic operator-dependent programming, when heating a raised cooking vessel and reaching the temperature of nearly 100 ° C or a temperature slightly below the boiling point holding option to offer automatically.
  • it is always available to an operator, without having to be previously selected with a certain adjustment.
  • the aforementioned time delay of a maximum of 20 seconds for the hold option seems defensible, even if an operator does not specifically desire this hold option at all.
  • FIG. 1 is very schematically a part of an induction hob 11 shown with a cooktop plate 13 and an induction heating coil arranged therebelow 15, as they are known from the prior art, in particular also from the aforementioned.
  • a pot 18 with water is placed therein to be heated or brought to a boil.
  • the induction hob 11 has a controller 20 which is connected to the induction heating coil 15 to detect the operating parameter of the induction heating coil 15 described above, in particular a vibration response, so as to detect a relative temperature profile of the temperature of the bottom of the pot 18.
  • the controller 20 is still connected to an optical or acoustic display 22 and at least one control element 23.
  • the controller 20 is advantageously connected to all the controls of the induction hob 11 and forms the only control of the induction hob 11th
  • Fig. 2 is shown in a diagram over time t, as the temperature T B of the bottom of the pot 18 extends, at the top of the bottom, as well as the temperature T W of the water in the pot 18 extends.
  • T W of the water is a mean temperature, since the water will be slightly hotter directly above the bowl bottom than at the top. During heating, such an inhomogeneous temperature distribution is common. The temperature differences are a maximum of about 10 ° C to 20 ° C apart.
  • the relative temperature profile S of the bottom of the pot 18 is plotted over time, as it can be detected from the above-described operating parameter of the induction heating coil 15.
  • a pot 18 placed on the induction hob 11 or the hotplate 16 is heated with water from the induction heating coil 15.
  • the controller 20 sets a high power density, for example a maximum boost power density of 10 W / cm 2 .
  • a high power density for example a maximum boost power density of 10 W / cm 2 .
  • the relative temperature curve S rises sharply, and the cup bottom temperature T B also increases, albeit weaker.
  • the temperature T W of the water rises only slowly. In this phase, especially the pot bottom heated, because only this can couple the heat in the water, which naturally slows down.
  • the water temperature T W approaches the temperature profile T B something.
  • the averaged water temperature T W reaches a value of about 85 ° C.
  • the above-described holding option for the above-mentioned holding time T H of about 20 sec is offered. The power density is greatly reduced to about 2 W / cm 2 to 3 W / cm 2 , so it is only 20% to 25%.
  • the controller 20 On the display 22, the controller 20 outputs a corresponding signal to an operator and the above-described holding time T H is started. Due to the reduced power density, the state of "light boiling" is then kept as possible and the water temperature T W takes the course shown in dash-dotted lines, ie remains at about 85 ° C.
  • This holding option offered to the operator can then be assumed by actuating the operating element 23 if this takes place within the holding time T H.
  • the previous high power density can be set again after the holding time has expired, in this case the maximum boost power density.
  • the power density can be increased again by the controller 20, but not to the maximum boost power density used at the outset, but to a high power density, for example at 4 W / cm 2 to 6 W / cm 2 .
  • a renewed heating of the water in the pot to a final temperature of 100 ° C throughout, but this takes a little longer.
  • the dashed line is the curve for the pot bottom temperature T B from the time of 300 seconds, when the power has been reduced by the controller 20 during the holding option. As a result of this power reduction, the pot base temperature T B also drops somewhat, as shown in dotted lines. In the case of the use of the holding option, it then remains at a low power density, so that in the long term, here, for example, from about 370 seconds, the pot bottom temperature T B has approached the water temperature T W and is equal to this.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Cookers (AREA)
EP17192545.6A 2016-10-10 2017-09-22 Procédé de fonctionnement d'un champ de cuisson à induction et champ de cuisson à induction Active EP3307019B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL17192545T PL3307019T3 (pl) 2016-10-10 2017-09-22 Sposób eksploatacji indukcyjnej płyty grzejnej i indukcyjna płyta grzejna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016219590.5A DE102016219590A1 (de) 2016-10-10 2016-10-10 Verfahren zum Betrieb eines Induktionskochfelds und Induktionskochfeld

Publications (2)

Publication Number Publication Date
EP3307019A1 true EP3307019A1 (fr) 2018-04-11
EP3307019B1 EP3307019B1 (fr) 2020-06-17

Family

ID=59930284

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17192545.6A Active EP3307019B1 (fr) 2016-10-10 2017-09-22 Procédé de fonctionnement d'un champ de cuisson à induction et champ de cuisson à induction

Country Status (7)

Country Link
US (1) US10820381B2 (fr)
EP (1) EP3307019B1 (fr)
KR (1) KR102364282B1 (fr)
CN (1) CN107920399B (fr)
DE (1) DE102016219590A1 (fr)
ES (1) ES2813587T3 (fr)
PL (1) PL3307019T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016224069A1 (de) * 2016-12-02 2018-06-07 E.G.O. Elektro-Gerätebau GmbH Kochgerät mit einer Kochplatte und einer Heizeinrichtung darunter
CN112545296B (zh) * 2019-09-25 2023-08-01 浙江苏泊尔家电制造有限公司 烹饪方法、烹饪器具及计算机存储介质

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1492385A2 (fr) * 2003-06-27 2004-12-29 E.G.O. Elektro-Gerätebau GmbH Méthode et dispositif de reconnaissance de processus de chauffage
WO2008148529A1 (fr) * 2007-06-05 2008-12-11 Miele & Cie. Kg Procédé de commande d'une table de cuisson et table de cuisson pour mettre en oeuvre ce procédé
EP2574143A2 (fr) * 2011-09-26 2013-03-27 E.G.O. ELEKTRO-GERÄTEBAU GmbH Procédé de chauffage d'un liquide contenu dans un récipient de cuisson et dispositif de chauffage à induction

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DE19821439A1 (de) * 1998-05-13 1999-11-18 Bsh Bosch Siemens Hausgeraete Sensorgesteuerte Garungseinheit mit Selbstkalibrierung
US7573005B2 (en) * 2004-04-22 2009-08-11 Thermal Solutions, Inc. Boil detection method and computer program
GB0711752D0 (en) * 2007-06-18 2007-07-25 Otter Controls Ltd Electrical appliances
PL2312909T3 (pl) * 2009-10-19 2015-10-30 Whirlpool Co Sposób sterowania zasilaniem w energię ciekłej zawartości naczynia do gotowania
JP2011090915A (ja) * 2009-10-23 2011-05-06 Panasonic Corp 誘導加熱調理器及びそのプログラム
DE102009047185B4 (de) 2009-11-26 2012-10-31 E.G.O. Elektro-Gerätebau GmbH Verfahren und Induktionsheizeinrichtung zum Ermitteln einer Temperatur eines mittels einer Induktionsheizspule erwärmten Kochgefäßbodens
EP2582203B1 (fr) * 2010-06-10 2017-08-30 Panasonic Corporation Cuisinière à induction
DE102011083386A1 (de) * 2011-09-26 2013-03-28 E.G.O. Elektro-Gerätebau GmbH Verfahren zum Beheizen eines Kochgefäßes mittels einer Induktionsheizeinrichtung und Induktionsheizeinrichtung
DE102011083397A1 (de) 2011-09-26 2013-03-28 E.G.O. Elektro-Gerätebau GmbH Verfahren zum Zubereiten von Lebensmitteln mittels einer Induktionsheizeinrichtung und Induktionsheizeinrichtung
EP2741570B1 (fr) * 2012-12-04 2016-04-06 Electrolux Home Products Corporation N.V. Procédé et unité de commande pour commander un processus de cuisson sur une table de cuisson par induction
EP2999301B1 (fr) * 2014-09-18 2019-03-06 Electrolux Appliances Aktiebolag Plaque de cuisson à induction avec détection d'ébullition et commande de l'énergie par induction, procédé pour chauffer des aliments avec une plaque de cuisson à induction et programme informatique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1492385A2 (fr) * 2003-06-27 2004-12-29 E.G.O. Elektro-Gerätebau GmbH Méthode et dispositif de reconnaissance de processus de chauffage
WO2008148529A1 (fr) * 2007-06-05 2008-12-11 Miele & Cie. Kg Procédé de commande d'une table de cuisson et table de cuisson pour mettre en oeuvre ce procédé
EP2574143A2 (fr) * 2011-09-26 2013-03-27 E.G.O. ELEKTRO-GERÄTEBAU GmbH Procédé de chauffage d'un liquide contenu dans un récipient de cuisson et dispositif de chauffage à induction

Also Published As

Publication number Publication date
EP3307019B1 (fr) 2020-06-17
KR102364282B1 (ko) 2022-02-16
KR20180039568A (ko) 2018-04-18
DE102016219590A1 (de) 2018-04-12
CN107920399A (zh) 2018-04-17
US10820381B2 (en) 2020-10-27
ES2813587T3 (es) 2021-03-24
US20180103511A1 (en) 2018-04-12
CN107920399B (zh) 2021-12-31
PL3307019T3 (pl) 2020-11-30

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