US20100239987A1 - Method for controlling a cooking point of a gas oven and device - Google Patents

Method for controlling a cooking point of a gas oven and device Download PDF

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Publication number
US20100239987A1
US20100239987A1 US12/724,664 US72466410A US2010239987A1 US 20100239987 A1 US20100239987 A1 US 20100239987A1 US 72466410 A US72466410 A US 72466410A US 2010239987 A1 US2010239987 A1 US 2010239987A1
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US
United States
Prior art keywords
pan
gas burner
gas
power level
cooking point
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.)
Abandoned
Application number
US12/724,664
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English (en)
Inventor
Martin Baier
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.)
Filing date
Publication date
Application filed by EGO Elektro Geratebau GmbH filed Critical EGO Elektro Geratebau GmbH
Assigned to E.G.O. ELEKTRO-GERAETEBAU GMBH reassignment E.G.O. ELEKTRO-GERAETEBAU GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BAIER, MARTIN
Publication of US20100239987A1 publication Critical patent/US20100239987A1/en
Priority to US12/970,061 priority Critical patent/US8931473B2/en
Abandoned legal-status Critical Current

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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 operating a gas burner at a cooking point, as used in a gas hob. Similarly, the invention relates to a corresponding device.
  • pan detection detecting whether a pan has been placed on or removed. With the removal of the pan, the cooking point is switched off, but a power level (i.e., gas output level) that has been set continues to be maintained. If a pan is then placed on again, the burner ignites immediately and, on account of the pressure conditions in the gas system and the delay of the igniting process, a briefly larger gas flame may occur, even reaching to beyond the handles of the pan. The gas flame will at least be of the size of the level that has been set, possibly even larger because of the briefly larger flame. The user must therefore quickly remove his/her hands from the handles of the pan in order not to be burned by the flame.
  • a power level i.e., gas output level
  • One aspect of the invention addresses the problem of providing a method mentioned at the beginning and a corresponding device by which disadvantages of the prior art can be overcome and, in particular, provides more convenient operation of a cooking point with a gas burner with reduced risk of injury.
  • the pan detection may advantageously be formed in the customary way that is known in principle, with capacitive, optical or mechanical systems being suitable in particular.
  • the pan detection together with a control of the cooking point or the gas burner or the gas valve thereof, in particular together with an ignition device for the flame, brings about the effect that the pan detection detects when a pan that has previously been removed is re-placed onto the cooking point. It then reactivates the gas burner by igniting the gas burner and/or opening the gas valve, in order that the cooking process is therefore continued as it were of its own accord after the pan is placed on again.
  • the originally set operation of the gas burner or a power level originally set for the gas burner only takes place or is reached to the full extent after a certain time delay.
  • a user therefore then has time, at least the time of this delay, to remove his/her hands from the pan again, and in this way the risk of burning is reduced or eliminated.
  • Said delay may advantageously be a few seconds, for example half a second to three or even five seconds. For instance, one to two seconds have proven to be advantageous, in order indeed to allow sufficient time on the one hand for the hands to be removed from the pan and on the other hand for a user to see relatively quickly that the cooking point is in operation again, or in turn in order that the cooking process is also not interrupted unnecessarily long.
  • the pan detection detects the re-placed pan immediately or only with minimal delay, but the gas burner only ignites at all after said delay of a few seconds.
  • the ignition of the gas burner waits for a short time after detection of the re-placed pan in order that the user can remove his/her hands from the pan. Only after the time delay is the gas burner ignited again. This may take place with a lower power level than that previously set or used. Since, however, a certain time is already available to remove the hands from the pan, re-ignition of the gas burner after the delay may also take place right away with the full power level previously set.
  • the pan detection may likewise detect the re-placement of the pan immediately or with minimal delay and also ignite the gas burner immediately or as soon as possible.
  • this ignition of the gas burner takes place with a power level which, though high enough that the gas burner reliably ignites, is at the same time well below the power level previously set.
  • This immediate ignition advantageously takes place with the lowest possible power level of the gas burner at which reliable ignition occurs. Then, however, the power level is slowly increased, until the power level previously set is reached. This slow increase of the power level proceeds over the aforementioned time delay and may indeed take the few seconds mentioned.
  • the gas burner is therefore ignited immediately when the re-placed pan is detected and when a user, in all probability, still has his/her hands on the pan. Since, however, the power level used is not the full level previously set, which could possibly lead to burns, but only a lower or the smallest possible level, the risk of burning is in turn reduced or eliminated. By the time the power level is increased to that previously set, the time delay has in turn elapsed and a user has sufficient time to remove his/her hands. A gas flame with a very small or the smallest possible power level will generally not be sufficient to cause burning of the hands holding the pan placed on.
  • the power level is possibly increased continuously to the value of the power level previously set. In further embodiments, it may first be increased slowly and then to ever increasing degree or finally, also at the end of the delay, be increased abruptly.
  • the removal of the pan from the cooking point is optically indicated.
  • indicating means such as illuminating source or the like, for example light-emitting diodes, may be arranged in the region of the cooking point.
  • an acoustic signal output may also take place. A signal output may continue for as long as the pan is removed and at the same time the cooking point has not yet been switched off as a result of a maximum time being exceeded.
  • the readiness of the cooking point is cancelled.
  • the power level setting is cancelled. Therefore, when a pan is placed on again, there is no automatic further operation of the cooking point or automatic switching back on of the gas burner.
  • first an operating element for the power level setting has to be actuated, that is to say a power level setting has to be manually set again. In this way, the control can reliably detect that a user is again in attendance.
  • the power level first may be set again right back to zero and subsequently set to the desired degree. Also in this respect it may be provided that such exceeding of the maximum time in the way prescribed is optically and/or acoustically indicated.
  • an additional safety feature may be provided that a signal is outputted shortly before the gas burner is re-ignited or shortly before the previously set power level is reached.
  • This may be an optical signal or advantageously an acoustic signal.
  • Such a signal may, for example, be generated half a second or a second before the power level originally set is reached when the pan is placed on again and the gas burner is automatically ignited.
  • a slow turning-off operation takes place, or the power level is as it were slowly brought to zero. This may last a number of seconds, for example two seconds to five seconds. Furthermore, it may at the same time be indicated, once again optically and/or acoustically in the aforementioned way.
  • slow turning off may also mean that, after the pan is removed, said few seconds are waited before the power level is brought down or the gas burner is turned off. As a result, the gas burner is not switched off unwantedly, which can result due to a malfunctions or the like when a pan is briefly not detected as placed-on.
  • a control in which both the pan detection and the control for the gas valve of the gas burner are integrated together with measurement of the time or the delay may possibly be provided in a central control of a corresponding gas hob. Alternatively, it may be designed as an additional control for certain cooking points.
  • the output of a signal, in particular an acoustic signal, before the ignition of the gas burner may have the advantage of detecting an object other than a pan has been placed on, for example a cooking spoon or the like, and warning an operator of the imminent ignition of the gas burner. Then, the object inadvertently placed on can be removed again thus avoiding an accident.
  • FIG. 1 shows a side view of a gas hob according to one embodiment of the invention with a device for the time-delayed ignition of a gas burner of a cooking point and
  • FIG. 2 shows a diagram of one embodiment of the power progression over time for various ways of increasing the power.
  • FIG. 1 illustrates a gas hob 11 as a device according to the invention, on which the method according to the invention can be carried out.
  • the gas hob 11 has a conventional hob panel 12 , and a cooking point 14 thereof is illustrated.
  • the cooking point 14 has a conventional gas burner 16 with a gas valve 17 arranged under the hob panel 12 , from which valve said burner is supplied.
  • an ignition device 18 Provided at the gas burner 16 is an ignition device 18 and advantageously a monitoring device (not illustrated) for the gas flames 19 .
  • An essentially conventional pan support 20 on which a pan 22 is placed over the gas burner 16 and the cooking point 14 , is also provided. This pan support has yet further functions, as still to be explained below.
  • the pan has side handles 23 , which are being gripped by hands 24 of the user, for example because said user has just placed the pan 22 on again.
  • a controller 26 which is connected not only to the gas valve 17 , for the activation thereof, and to the ignition device 18 but also, though not of any consequence here, to a possible flame monitor. Furthermore, the controller 26 is connected to a pan detection device, which is not described in any more detail but is formed as a known reflex light barrier and is arranged underneath the hob panel 12 . Furthermore, the controller 26 is connected to signal transmitters under the hob panel 12 , such as an acoustic signal transmitter 28 a and an optical signal transmitter 28 b . It is also possible to omit the signal transmitters or to provide only one of the two.
  • the pan detection device 21 When the pan 22 is removed from the cooking point 14 , as the thick arrow indicates, the pan detection device 21 together with the controller 26 detects this. The latter then closes the gas valve 17 , so that the gas burner 16 goes out or the gas flames 19 are extinguished. If the pan 22 is then placed on again with the hands 24 on the handles 23 , the pan detection device 21 detects the pan 22 . This then corresponds to the point in time t 0 in the diagram of the power P over the time t according to FIG. 2 , to be specific when the power of the gas burner 16 is increased from zero, that is when the gas valve 17 is closed.
  • a power P min which is chosen such that it is the minimum power or minimum power level or minimum amount of gas with which the gas burner 16 can ignite and burn.
  • a delay time T V which is the delay time mentioned at the beginning, there may be a few seconds, advantageously one to two seconds.
  • the power P is then not increased over the minimum power P min , as shown by the solid line. This only happens abruptly at the point in time t 1 , and then specifically to the power originally set P 0 . This power P 0 was the power before the pan 22 was removed.
  • an operator therefore has sufficient time after placing the pan 22 onto the cooking point 14 , that is the said one to two seconds, to remove the hands 24 again from the region in which the gas flames 19 can come.
  • the gas burner 16 ignites again, the gas flames 19 scarcely reach over the base of the pan 22 to the sides and up to the handles 23 or the hands 24 , since said burner operates with the lowest possible minimum power.
  • the power may, as from the point in time t 0 , first increase slightly and then ever more quickly as shown by a dotted curve in the manner of a parabola or non-linearly. As a result, it can also at the same time be signalled to a user that not only has re-ignition taken place but there has also been an increase in the power automatically beyond the minimum power P min . The user therefore does not have to worry that the cooking point 14 is malfunctioning.
  • the increase in output level as from the point in time t o may take place uniformly as shown by the dash-dotted representation.
  • an increase in the burning power once again takes place here somewhat more quickly than in the case of the two previous curves, it is still always in such a way that, for example after the elapse of a time T V /2 after the point in time t 0 , there is still a much lower power than the power previously set P 0 .
  • the gas burner 16 is still out or the gas valve 17 is closed. Only at the point in time t 1 , that is after the delay time T V , is the gas burner 16 ignited by opening of the gas valve 17 and actuation of the ignition device 18 , then however right away as shown by the dashed curve with the full pre-set power P 0 .
  • This has the advantage that even a possibly existing risk of burning caused by a gas flame with the low minimum power P min is eliminated, since indeed there are still no gas flames 19 .
  • the re-ignition of the gas burner 16 at the point in time t 1 then takes place with the full pre-set power P 0 and abruptly.
  • an acoustic and/or optical signal output by the signal transmitters 28 a and 28 b may take place at a point in time t 0 , t 1 or a point in time in between. This may signal re-ignition of the gas burner 16 , that the full power previously set P 0 will soon be reached or has been reached, or something similar.

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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)
  • Regulation And Control Of Combustion (AREA)
  • Cookers (AREA)
  • Baking, Grill, Roasting (AREA)
US12/724,664 2009-03-17 2010-03-16 Method for controlling a cooking point of a gas oven and device Abandoned US20100239987A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/970,061 US8931473B2 (en) 2009-03-17 2010-12-16 Method for controlling a cooking point of a gas oven and device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910014570 DE102009014570A1 (de) 2009-03-17 2009-03-17 Verfahren zur Steuerung einer Kochstelle eines Gasherdes sowie Vorrichtung
DE102009014570.2 2009-03-17

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US12/970,061 Active 2031-06-11 US8931473B2 (en) 2009-03-17 2010-12-16 Method for controlling a cooking point of a gas oven and device

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EP (1) EP2230462B1 (de)
DE (1) DE102009014570A1 (de)
ES (1) ES2584054T3 (de)

Cited By (12)

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US20150184866A1 (en) * 2012-08-28 2015-07-02 Electrolux Home Products Corporation N. V. Method of operating a gas burner of a cooking appliance
US9078449B2 (en) 2012-07-24 2015-07-14 General Electric Company Cook top grate as utensil size/presence detector
EP3147566A1 (de) 2015-09-22 2017-03-29 Electrolux Appliances Aktiebolag Gasbrenneranordnung für eine gaskochvorrichtung mit thermoelement
US9909763B2 (en) 2014-09-18 2018-03-06 E.G.O. Elektro-Geraetebau Gmbh Method of pot detection and gas hob
JP2018128170A (ja) * 2017-02-06 2018-08-16 大阪瓦斯株式会社 コンロ
JP2018128166A (ja) * 2017-02-06 2018-08-16 大阪瓦斯株式会社 コンロ
JP2018128169A (ja) * 2017-02-06 2018-08-16 大阪瓦斯株式会社 コンロ
JP2018128164A (ja) * 2017-02-06 2018-08-16 大阪瓦斯株式会社 コンロ
JP2018128168A (ja) * 2017-02-06 2018-08-16 大阪瓦斯株式会社 コンロ
US10228144B2 (en) 2015-05-28 2019-03-12 Whirlpool Corporation Method of pan detection and cooktop adjustment for multiple heating sections
JP2020016354A (ja) * 2018-07-23 2020-01-30 リンナイ株式会社 加熱調理システム
US11357080B2 (en) * 2019-09-30 2022-06-07 Midea Group Co., Ltd. Cooking container sensing for ignition triggering and programmed cooking

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CA2884436C (en) 2007-11-16 2018-04-03 Wolfedale Engineering Limited Temperature control apparatus for a barbeque grill
US9289096B2 (en) * 2007-11-16 2016-03-22 Wolfedale Engineering Limited Temperature control device and method
JP2014238202A (ja) * 2013-06-06 2014-12-18 リンナイ株式会社 ガスコンロ
DE102013218339A1 (de) * 2013-09-12 2015-03-12 E.G.O. Elektro-Gerätebau GmbH Verfahren zur Topferkennung und Gaskochfeld
DE102013218950A1 (de) * 2013-09-20 2015-03-26 E.G.O. Elektro-Gerätebau GmbH Vorrichtung und Verfahren zur Topferkennung
GB2520088A (en) * 2013-11-12 2015-05-13 Yougreen Ltd Gas burner safety system, sensor unit and method
JP6561562B2 (ja) * 2014-06-30 2019-08-21 パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカＰａｎａｓｏｎｉｃ Ｉｎｔｅｌｌｅｃｔｕａｌ Ｐｒｏｐｅｒｔｙ Ｃｏｒｐｏｒａｔｉｏｎ ｏｆ Ａｍｅｒｉｃａ 加熱調理装置、情報表示装置、制御方法、調理器具、およびコンピュータプログラム
WO2016181191A1 (en) * 2015-05-12 2016-11-17 Yougreen Limited Gas burner safety device, system and alarm
CN108716697B (zh) * 2016-08-31 2019-07-12 浙江厨壹堂厨房电器股份有限公司 伺服系统控制无级调温的改良型集成灶
US9803872B1 (en) 2016-10-28 2017-10-31 Bin Lu Automatic heat-source shut-down system for cooking stoves
CN109386845B (zh) * 2017-08-14 2022-05-17 博西华电器（江苏）有限公司 一种灶具及其点火控制方法
JP7303098B2 (ja) * 2019-12-09 2023-07-04 リンナイ株式会社 ガスコンロ
JP7303097B2 (ja) * 2019-12-09 2023-07-04 リンナイ株式会社 ガスコンロ

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EP2230462A3 (de) 2011-03-30
DE102009014570A1 (de) 2010-09-23
US20110083663A1 (en) 2011-04-14
ES2584054T3 (es) 2016-09-23
EP2230462B1 (de) 2016-05-11
US8931473B2 (en) 2015-01-13

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