EP2998654A1 - Procede de reconnaissance de casserole et plaque de cuisson - Google Patents

Procede de reconnaissance de casserole et plaque de cuisson Download PDF

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Publication number
EP2998654A1
EP2998654A1 EP15183732.5A EP15183732A EP2998654A1 EP 2998654 A1 EP2998654 A1 EP 2998654A1 EP 15183732 A EP15183732 A EP 15183732A EP 2998654 A1 EP2998654 A1 EP 2998654A1
Authority
EP
European Patent Office
Prior art keywords
gas
pot
gas hob
power
hob
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
EP15183732.5A
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German (de)
English (en)
Other versions
EP2998654B1 (fr
Inventor
Elmar Herweg
Daniel Parker
Jochen Rickert
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
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.)
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Publication date
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Publication of EP2998654A1 publication Critical patent/EP2998654A1/fr
Application granted granted Critical
Publication of EP2998654B1 publication Critical patent/EP2998654B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/12—Arrangement or mounting of control or safety devices
    • F24C3/126—Arrangement or mounting of control or safety devices on ranges

Definitions

  • the invention relates to a method for pot detection on a gas hob with gas burner, wherein the gas hob is arranged on a gas hob.
  • the gas hob has a plurality of such gas hobs.
  • the invention relates to a gas hob, which is designed for carrying out this method.
  • the invention has for its object to provide an aforementioned method and trained to carry out the gas hob, with which problems of the prior art can be avoided and it is in particular possible to detect both a removal of a pot from a gas hob safely and to create related functions or comfort functions.
  • a detection means is provided or attached to the gas cooking point, which has a function for flame or temperature detection and is designed as ionization or as a thermocouple. It is actually measured at the thermocouple no absolute temperature, but only a temperature difference between the base point and the measuring point. Either the respective temperature is then determined starting from a room temperature as a comparison and from this a temperature difference is determined, or in any case it is only looked at temperature differences.
  • only temperature differences between pot are placed and removed pot evaluated. This is even the case when the pot is removed again immediately after commissioning the cooking area, since the base point would still have approximately room temperature.
  • the detection means is attached to the gas hob in such a way that it is directly exposed to the flame of each permanently possible power of the gas burner or at least always acted upon by the hot gas flow of the flames during operation of the gas burner. This applies both to operation with the maximum power of the gas burner and with its minimum power.
  • the ionization electrode or the thermocouple experiences the change in the flame, that is, the detection means does not always have to be completely in the flame, but always gets at least the hot gas flow. This could be, for example, if it is between two flame cones of the gas flame.
  • an electrical signal is picked up at the detection means and evaluated, evaluated in particular over time. Depending on the design of the detection means as ionization or thermocouple this may be an ionization or a thermoelectric voltage flowing through the detection means or abut against this. This tapped electrical signal is evaluated by comparing the current signal with the signal in the case that a pot is put on. This corresponds to the signal that was present just before the pot was taken off.
  • the detection means when the pot is placed on the detection means, a different temperature prevails or the flame has a different shape, possibly there is also a higher temperature or a flame burns in a different form than when removed pot, if a different or possibly lower temperature prevails. Therefore, it can also be turned off advantageously to the aforementioned temperature differences. Whether a higher or lower temperature at the thermocouple or the ionization electrode prevails when the pot is removed depends largely on its positioning. The flame itself has consistent burner performance on, only their shape changes by removing or putting the pot. Unlike the aforementioned DE 4218278 A1 However, the detection means is even when removed pot still hit by the flames directly or at least hit by the hot gas flow. Thus, when the pot is removed, the signal of the detection means does not simply disappear completely, but is still present, but only just lower or present in another form, which allows a more secure evaluation. It is now much smaller than when put on pot, which allows a good distinction.
  • the power is reduced at the gas hob, and indeed to the minimum power of this hotplate or to the minimum power of this gas burner.
  • the minimum power is the power at which the gas burner can just be operated permanently and in a reliable manner. This means that in this embodiment, the gas burner is not completely switched off immediately. It can be advantageously provided that the reduction of the power to the minimum power takes place immediately when the removal of the pot has been detected. It is therefore not waiting for a certain time, which could mislead an operator to the fallacy that the gas burner would now continue to burn for a very long time with the previous performance.
  • the advantage of continuing to burn the gas burner with the minimum power is that on the one hand, the gas consumption is not particularly large.
  • a second circle or an outer circle in the event that the gas burner is a two-circuit gas burner, a second circle or an outer circle can be completely switched off or switched off.
  • a first circuit or an inner circuit can be operated with reduced power, advantageously similar to that described above, with a minimum power valid for this first circuit or inner circuit.
  • a manual intervention of an operator may not be necessary to re-ignite after a renewed placement of the pot on the gas hob the gas burner.
  • the detection means should then be arranged so close to the inner gas burner to always be acted upon by the gas flame according to the condition described above.
  • this gas hob or the associated gas burner is switched off.
  • This first minimum duration can be, for example, between half a minute and 5 minutes or even up to 15 minutes. This is to ensure that after a removal of the pot after completion of the cooking process, the gas burner or the gas hob is no longer needed and then turned off after some time. In this case, then the quick readiness of the gas burner to start the power is no longer necessary.
  • the gas hob or the gas burner is completely switched off. This is above all a mode with even higher safety and even more reduced gas consumption. It can be provided particularly advantageous that the shutdown takes place immediately after detecting the removal of the pot without a delay, so that, for example, within a time of 2 seconds, the gas flames go out.
  • the gas hob has touch switches for operating the gas hob or the gas hobs.
  • it only has touch switches.
  • the power can be reduced at the gas hob according to the first embodiment mentioned above, so if the gas supply is not stopped immediately.
  • the detected removal of the pot can be visually and / or acoustically displayed to an operator.
  • the operator knows, of course, that she has taken the pot from the gas hob, but this message is feedback, so that the operator knows that a control of the gas hob or a normally provided automatic burner has really recognized the removal of the pot.
  • the operation of the gas hob does not automatically with a higher power than the minimum power done, for example, the previously set performance, but the operator must make an action.
  • a trained and provided for this purpose Touch switch be provided with further operation function, and if this is operated after putting the pot, the gas hob is operated again with the previously set power level. This is especially in the case of advantage that the pot has been removed from the gas stove for a relatively short time to make something in the food or food prepared therein, but not because the cooking process is already finished in itself. Due to the fact that the operator once again has to actuate the additional operating element or the further contact switch in addition to placing the pot, a deliberate action is also provided.
  • the gas hob for operating the gas hob mechanically movable control knob which may be in particular rotary knob.
  • the power at the gas hob is reduced.
  • a reduction to the minimum power In the event of restarting the gas hob by re-putting the pot, the power is increased again to the previously set by the control knob power.
  • a purpose-trained operating element advantageously also a mechanically movable operating element such as a push button, are operated to restore the previously set power level, which corresponds to a position of the control knob.
  • the power can be automatically increased again, without intervention of the operator.
  • the control knob must first be brought back to a zero position. This is because the operation of the gas hob or gas burner can only begin when the power is increased from zero.
  • the zero position of the control knob is used here for initialization.
  • a direct connection to an actuator for a gas valve for the gas burner can be provided, which can not be easily reset to zero.
  • a control knob can be connected purely electrically to the automatic burner. The rotation to zero can then be used to reinitialize the gas hob.
  • a reduction of the power is displayed optically and / or acoustically for an operator.
  • a shutdown of the gas burner or the entire gas hob can be displayed, but possibly different than the reduction of power.
  • an increase or a resumption of a previously set performance can be displayed accordingly, advantageously different.
  • FIG. 1 shows a schematic representation of a gas hob according to the invention with a gas hob described above.
  • a gas hob 11 according to the invention is shown in section with a hob surface 12 and a gas hob 14, which is essentially formed by a gas burner 16 and a pot carrier 19.
  • the gas burner 16 has a conventional burner body 17th and a burner cap 18.
  • the pot carrier 19 has a plurality of arms on which a pot 20 is placed.
  • a gas valve 23 which is connected to a main supply line 22, with which a plurality of gas valves of the gas hob 11 can be supplied.
  • a Feuerungsautomat 25 which is equipped with an ignition electrode 26 for igniting the flame.
  • the automatic burner 25 is connected to a cooktop controller 28, which is the main controller for the gas hob 11 and corresponds to an aforementioned control assembly.
  • Operating commands of an operator to the hob control 28 or to the gas hob 11, such as for power adjustment, can be entered by means of a rotary knob 30 and an additional operating element 32, which are both connected to a signal generator 33 via a bus system 29 with the hob control 28.
  • An additional operating element could also be integrated in the rotary knob 30.
  • the mechanically movable rotary knob 30 and touch switch can be provided, for example, to adjust the power. Up to this point, the structure and function of the gas hob 11 correspond to the prior art.
  • thermocouple 34 is arranged at the gas hob 14 and close to the gas burner 16 as initially mentioned detection means, and to the left of the gas burner 16.
  • the distance of the thermocouple 34 to the gas burner 16 may be about as large as that of the ignition electrode 26th It should be ensured that the thermocouple 34 is always acted upon directly by flames of the gas burner 16, as shown, or so close to the thermocouple 34 at each permanently possible power stage of the gas burner 16, either directly from the flames or at least from the hot gas flow the flames are applied directly. This therefore applies both at minimum power of the gas burner 16 and at maximum power and intermediate power levels.
  • the thermocouple 34 is also connected to the automatic burner 25, which thus controls both the ignition of the gas burner via the ignition electrode 26 and the flame detection via the thermocouple 34.
  • thermoelectric voltage generated by the thermocouple 34 is detected.
  • the level of this thermoelectric voltage depends on the temperature at the thermocouple 34 and thus on the intensity of the gas flame and its orientation with respect to the thermocouple 34.
  • the temperature on the thermocouple 34 depends on the strength of the Gas flame or thus of the burner power. Above all, however, the experiments have shown that the temperature at the thermocouple 34 also depends on whether the pot 20 is placed on the gas hob 14 or whether it has been removed. In the first case of the attached pot, the gas flames usually run with a slightly flatter angle, in the second case with a larger or steeper angle upwards.
  • thermocouple should, as explained above, be arranged so that it is hit over the entire power range of the gas burner 16 away in both cases by the gas flames or at least their hot air flow.
  • the temperature on the thermocouple 34 and thus its generated thermal voltage changes.
  • the admission of the thermocouple 34 with the gas flame changes and may be lower and thus also its temperature and its thermal voltage.
  • the controller 28 and the automatic burner 25 can distinguish this case very clearly from the case of a reduction in performance, in which the application of the thermocouple is also different, since they would set a reduction of the power yes on the gas valve 23 itself and thus on this information feature.
  • thermoelectric voltage of the thermocouple 34 may be provided from a decrease in the pot 20 is detected by lowering or changing the thermoelectric voltage , For example, it can be implemented that when the thermal voltage drops or changes by at least 30%, alternatively by at least 50%, a decrease in the pot 20 is detected by the gas cooking point 14 and evaluated as such. Especially important is the time dependence or how fast the thermoelectric voltage drops or rises when the pot is removed.
  • thermocouple 34 relatively close to the gas burner 16 and thus relatively central to the position of an attached pot 20 is that in a possibly unintentional stronger displacement of the pot 20, in which then a strong outside arranged detection means a heat storage under the pot not right anymore could capture because the pot is more over it, does not have a negative impact.
  • the middle area near the gas burner will actually always be covered by a pot.
  • the controller 28 with the automatic burner 25 can reduce the power of the gas burner 16, either to a minimum power or completely off.
  • this rotary knob 30 has a fixed association between rotational position or rotational position and power setting. In this case, an operator after renewed placement of the pot 20 on the gas hob 14 restore the previously set power level by pressing the auxiliary control element 32, especially in the case of a complete shutdown of the gas burner 16.
  • thermocouple 34 can detect a rising thermoelectric voltage or a change in the thermoelectric voltage to the touchdown of the pot as described above, so that possibly also a return to the previously set power could be done.
  • an operator can also select a power level other than the previously set level on the rotary toggle 30 and trigger the reignition of the gas burner 16 via the firing automat 25 by actuating the additional operating element 32.
  • the hotplate remains either on the reduced power or off.
  • the removal of the pot can be indicated by a flashing of the signal generator 33.
  • the gas hob 14 after a defined time, for example, half a minute to ten minutes, in which it has been operated at reduced power, be turned off when no further user input is made.
  • the rotary knob 30 In order then to put the gas hob 14 back into operation again, the rotary knob 30 must first be brought to its zero position, then it can be restarted normally.
  • the rotary knob 30 is designed as an incremental encoder for power adjustment, then only the distance traveled and not the rotational position via a set power level, or only power switches are used for power adjustment as previously explained, so the power level after detecting the removal of the pot 20th from the gas hob 14 either on a reduced power, advantageously the minimum power to be set or the gas hob 14 are turned off completely.
  • the removal of the pot can be displayed to an operator via the signal generator 33.
  • the pot 20 is then placed back on the gas hob and he should be operated with the previously set power, this can either be done automatically after detecting the placement of the pot in the case of a power reduction to the minimum power or only after pressing the additional control element 32nd In a complete shutdown of the gas hob 14, the additional control element 32 must be actuated, since then yes a detection of a placement of the pot 20 on the gas hob 14 is not possible, at least not on the thermocouple 34th
  • the gas cooking point 14 is completely switched off, if after removing the pot 20 no input is made by an operator.
  • This can be, for example, a time between 2 minutes and 20 minutes.
  • thermocouple 34 instead of the thermocouple 34, an ionization electrode mentioned in the introduction can also be used as the detection means. This should then be arranged in the same position as the thermocouple 34.
  • the ionization current flowing through them depends, as described above for the thermoelectric voltage, on the strength of the gas flame or on the strength of the exposure of the ionization electrode to the gas flame.
  • an ionization electrode whether a pot 20 is placed on the gas hob 14 above the ionization or not.
  • Fig. 1 It is also easy to imagine how the invention works with a two-circuit gas burner. This could additionally be arranged around the gas burner 16 with some distance outside and be connected to it via a firing bridge. Thus, the gas burner for the outer circuit needs neither a ignition electrode nor a flame monitoring. Since the outer circuit is supplied with another own gas valve with gas, but possibly on the same automatic burner 25, this is done so that he only is then supplied with gas, although the inner circle or the gas burner 16 is both supplied with gas and the gas flame burns. Then, this ignition bridge ensures that the gas flowing out of the outer circuit also burns.
  • the outer circuit is completely shut off by closing its gas valve, the inner circle or the gas burner 16 but with the previously for himself continue to be adjusted. Even so, a significant and advantageous energy saving is already possible.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
EP15183732.5A 2014-09-18 2015-09-03 Procede de reconnaissance de casserole et plaque de cuisson Active EP2998654B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014218741.9A DE102014218741A1 (de) 2014-09-18 2014-09-18 Verfahren zur Topferkennung und Gaskochfeld

Publications (2)

Publication Number Publication Date
EP2998654A1 true EP2998654A1 (fr) 2016-03-23
EP2998654B1 EP2998654B1 (fr) 2019-02-20

Family

ID=54062684

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15183732.5A Active EP2998654B1 (fr) 2014-09-18 2015-09-03 Procede de reconnaissance de casserole et plaque de cuisson

Country Status (5)

Country Link
US (1) US9909763B2 (fr)
EP (1) EP2998654B1 (fr)
DE (1) DE102014218741A1 (fr)
ES (1) ES2723398T3 (fr)
TR (1) TR201906445T4 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3147566B1 (fr) * 2015-09-22 2020-05-06 Electrolux Appliances Aktiebolag Système de brûleur à gaz pour une cuisinière à gaz avec un thermocouple et procédé pour déterminer si un ustensile de cuisson est placé sur le brûleur à gaz.

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3270060B1 (fr) * 2016-07-11 2019-11-27 Electrolux Appliances Aktiebolag Système de brûleur à gaz pour plaque de cuisson à gaz
CN109974036A (zh) * 2017-12-27 2019-07-05 博西华电器（江苏）有限公司 燃气灶
US10718517B2 (en) * 2018-05-03 2020-07-21 Grand Mate Co., Ltd. Gas appliance and control method thereof
US10799065B2 (en) * 2018-09-12 2020-10-13 Haier US Appliance Solution, Inc. Thermocouple for measuring cookware temperature
CN111256172A (zh) * 2018-11-30 2020-06-09 宁波方太厨具有限公司 一种燃气灶的控制方法及实现该控制方法的燃气灶
US11357080B2 (en) 2019-09-30 2022-06-07 Midea Group Co., Ltd. Cooking container sensing for ignition triggering and programmed cooking
US11274826B2 (en) * 2019-10-03 2022-03-15 Haier Us Appliance Solutions, Inc. Delayed ignition prevention in a multi-ring gas burner for a cooktop appliance
CN112984576B (zh) * 2021-03-01 2023-05-19 山东金百川厨业科技有限公司 一种灶具节油装置
CN113503568A (zh) * 2021-07-26 2021-10-15 珠海格力电器股份有限公司 燃气灶、燃烧器、燃烧器的控制方法及控制装置
CN114278933A (zh) * 2021-12-13 2022-04-05 浙江蓝炬星电器有限公司 一种移锅小火燃烧器
US20240200783A1 (en) * 2022-12-14 2024-06-20 Whirlpool Corporation Flame ionization detection for pan detection and power management in a gas cooktop

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US4499368A (en) * 1984-03-05 1985-02-12 General Electric Company Utensil removal detection system for cooking appliance
DE4218278A1 (de) 1992-06-03 1993-12-09 Seppelfricke Geb Gmbh Vorrichtung zur Sicherung eines Gaskochstellenbrenners
EP1152190A1 (fr) * 1998-11-24 2001-11-07 Matsushita Electric Industrial Co., Ltd. Organe de commande de debit gazeux et appareil a gaz comportant cet organe
US6462316B1 (en) * 2000-10-10 2002-10-08 General Electric Company Cooktop control and monitoring system including detecting properties of a utensil and its contents
EP2230462A2 (fr) * 2009-03-17 2010-09-22 E.G.O. Elektro-Gerätebau GmbH Procédé de commande d'une plaque de cuisson d'une cuisinière à gaz ainsi que dispositif
EP2444726A2 (fr) * 2010-10-25 2012-04-25 E.G.O. Elektro-Gerätebau GmbH Brûleur à gaz pour un champ de cuisson au gaz et champ de cuisson au gaz ainsi que procédé destiné au fonctionnement d'un tel champ de cuisson au gaz
EP2863128A1 (fr) * 2013-09-12 2015-04-22 E.G.O. Elektro-Gerätebau GmbH Procédé de reconnaissance de casserole et champ de cuisson

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US4681084A (en) * 1985-05-28 1987-07-21 George Catsouras Burner control system
US5648008A (en) * 1994-11-23 1997-07-15 Maytag Corporation Inductive cooking range and cooktop
US8100121B2 (en) * 2005-08-16 2012-01-24 Bsh Bosch Und Siemens Hausgeraete Gmbh Timer for a gas cooking hob
RU2651734C2 (ru) 2013-03-27 2018-04-23 Электролюкс Хоум Продактс, Инк. Способ обнаружения посуды на основе перекрестного нагрева термопары

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4499368A (en) * 1984-03-05 1985-02-12 General Electric Company Utensil removal detection system for cooking appliance
DE4218278A1 (de) 1992-06-03 1993-12-09 Seppelfricke Geb Gmbh Vorrichtung zur Sicherung eines Gaskochstellenbrenners
EP1152190A1 (fr) * 1998-11-24 2001-11-07 Matsushita Electric Industrial Co., Ltd. Organe de commande de debit gazeux et appareil a gaz comportant cet organe
US6462316B1 (en) * 2000-10-10 2002-10-08 General Electric Company Cooktop control and monitoring system including detecting properties of a utensil and its contents
EP2230462A2 (fr) * 2009-03-17 2010-09-22 E.G.O. Elektro-Gerätebau GmbH Procédé de commande d'une plaque de cuisson d'une cuisinière à gaz ainsi que dispositif
EP2444726A2 (fr) * 2010-10-25 2012-04-25 E.G.O. Elektro-Gerätebau GmbH Brûleur à gaz pour un champ de cuisson au gaz et champ de cuisson au gaz ainsi que procédé destiné au fonctionnement d'un tel champ de cuisson au gaz
EP2863128A1 (fr) * 2013-09-12 2015-04-22 E.G.O. Elektro-Gerätebau GmbH Procédé de reconnaissance de casserole et champ de cuisson

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3147566B1 (fr) * 2015-09-22 2020-05-06 Electrolux Appliances Aktiebolag Système de brûleur à gaz pour une cuisinière à gaz avec un thermocouple et procédé pour déterminer si un ustensile de cuisson est placé sur le brûleur à gaz.

Also Published As

Publication number Publication date
TR201906445T4 (tr) 2019-05-21
ES2723398T3 (es) 2019-08-27
US20160084506A1 (en) 2016-03-24
EP2998654B1 (fr) 2019-02-20
DE102014218741A1 (de) 2016-03-24
US9909763B2 (en) 2018-03-06

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