EP1837600A2 - Procédé de surveillance, de commande ou de réglage d'un appareil de chauffage électrique fermé - Google Patents

Procédé de surveillance, de commande ou de réglage d'un appareil de chauffage électrique fermé Download PDF

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Publication number
EP1837600A2
EP1837600A2 EP07005760A EP07005760A EP1837600A2 EP 1837600 A2 EP1837600 A2 EP 1837600A2 EP 07005760 A EP07005760 A EP 07005760A EP 07005760 A EP07005760 A EP 07005760A EP 1837600 A2 EP1837600 A2 EP 1837600A2
Authority
EP
European Patent Office
Prior art keywords
temperature
heater
heating
atmosphere
heating chamber
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
EP07005760A
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German (de)
English (en)
Other versions
EP1837600B1 (fr
EP1837600A3 (fr
Inventor
Konrad SCHÖNEMANN
Wolfgang Thimm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EGO Elektro Geratebau GmbH
Original Assignee
EGO Elektro Geratebau GmbH
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
Application filed by EGO Elektro Geratebau GmbH filed Critical EGO Elektro Geratebau GmbH
Priority to SI200730113T priority Critical patent/SI1837600T1/sl
Publication of EP1837600A2 publication Critical patent/EP1837600A2/fr
Publication of EP1837600A3 publication Critical patent/EP1837600A3/fr
Application granted granted Critical
Publication of EP1837600B1 publication Critical patent/EP1837600B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/08—Arrangement or mounting of control or safety devices
    • F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination

Definitions

  • the invention relates to a method for monitoring or control or regulation of a closed electric heating appliance with a closed boiler room, in particular an oven, steamer or dryer.
  • the invention has for its object to further develop an aforementioned method so that thus a said electric heater can be operated advantageously and overall advantageous way can be created to operate with so-called gas sensors, an electric heater.
  • the electric heating device has a heater and a temperature detection in the heating chamber and a control device including means for detecting the time and the heating power of the heater.
  • the electric heater or its heating are advantageously operated clocking.
  • the time course of at least one signal of the temperature detection and the time course of the heating power are detected in the control device, from which the state in the boiler room or components of gases contained therein are determined.
  • the information obtained in this way is used to monitor sensors present in the oven or to control or regulate the operation of the electric heating appliance.
  • this allows the constituents of the atmosphere in the boiler room or the gases contained therein to be recognized in terms of their type and concentration.
  • This in turn can be closed on the one hand on the type of baked goods or the like and on the condition thereof, as for example in the DE 103 40 146 A1 is described.
  • a moisture measurement is possible, which can be dispensed with great advantage on special gas sensors or humidity sensors.
  • the temperature detection can advantageously have a temperature sensor, wherein the temperature detection detects the reaction of the temperature sensor to a temperature jump in the boiler room. From this reaction or the corresponding information, the thermal conductivity and / or the atmospheric humidity of the atmosphere in the boiler room can be determined via the temperature sensor signals. This can be done particularly advantageously on the basis of the transit time or amplitude of the sensor signals, since these allow a conclusion to the desired information.
  • the invention can also achieve that existing functional units, for example in an oven, can be used and no further needed.
  • a heater is inevitably and provided by default in an oven, means for temperature detection, such as temperature sensors, also.
  • temperature sensors are partially thermo-mechanically formed with expansion box and capillary tube connection to a temperature sensing device.
  • electrical temperature sensors are already being used, which can be evaluated electronically by means of a corresponding controller.
  • the aforementioned temperature jumps are generated by a cyclic operation of the heater.
  • this can be done by a regular continuous operation in continuous operation, as it corresponds, for example, the normal operation of the electric heater.
  • the advantage of this is that in one of the normal modes of operation of the electric heater nothing has to be changed in the process, so that both the operation can go undisturbed and the cost of deviating control methods can be saved.
  • a temperature jump for the temperature detection and determination of the atmosphere in the boiler room can be specifically initiated by a heater deviating from the otherwise currently prevailing operating conditions. This therefore means an opening of the aforementioned normal intended operation of the electrical appliance.
  • the advantage here is that then always the same temperature jump can be performed. In particular, it is always the same insofar as it deviates from a prevailing basic temperature by a certain percentage. Alternatively, it can always deviate by a certain absolute temperature difference. This in turn simplifies the evaluation of the obtained Sensor signals, although for a small disturbance or change in the operation of the electric heater is necessary.
  • the temperature jump is a jump up, so with increasing temperature.
  • a temperature jump down is possible only by switching off the heater and subsequent cooling of the boiler room, which is slow due to the usual good thermal insulation.
  • the cooling or cooling rate is detected at the temperature sensor.
  • the temperature sensor it is possible to effect a faster cooling than usual or to detect both increase in temperature during the temperature jump and cooling or falling of the temperature under certain circumstances. Since the temperature jump is introduced from the top of the heater and can be detected in the atmosphere in the boiler room depending on the distance to the heater, but not necessarily leads to a uniform increase in the total temperature in the boiler room, the subsequent cooling is also stronger than from the normal state the temperature conditions out.
  • a temperature jump can be generated for a relatively manageable duration, for example a few minutes or even less than a minute.
  • a subsequent cooling with a cooling rate A can last longer, in particular a few minutes, until the "normal" temperature value is reached again after a temperature rise.
  • the specification of the time interval can be based on the one hand on the practical conditions for the times of the oven control on the other hand also on the sensor arrangement with regard to the necessary accuracies. In any case, the time intervals are to be chosen in dependence on the other arrangements in such a way as to ensure that the disturbances in the system are smaller than the effects which are actually due to the different state of the gases.
  • a plurality of temperature sensors are provided for a temperature detection. They may advantageously have a different distance from the heater in order to detect not only the pure temporal behavior of the temperature but also a local course of the temperature. For example, two to five temperature sensors may be provided, of course, it should be noted that both the cost of the evaluation of the respective sensor signals increases with the number and the additional design effort for the plurality of temperature sensors. This should actually be kept in check.
  • sensors or temperature sensors which can temporarily perform other functions. This could e.g. Functions as a lamp or to control a door lock be.
  • the thermal conductivity of the atmosphere can be detected in the boiler room. This can also be on the Composition of the atmosphere from different gases are closed by their specific values for their thermal conductivity. These values are stored in the control device and can be retrieved.
  • a further embodiment of the invention can be concluded from the running time of a sensor signal of the temperature detection on properties of the atmosphere or the gases in the boiler room. These properties are thermal conductivity, thermal conductivity and / or density of a carrier medium or the atmosphere. Also for this purpose, a comparison can be made with corresponding values stored in the control device.
  • the temperature jumps can not only be provided outside the normal operation of the electric heater, but also be generated by an additional heater.
  • This additional heating can not be provided for the considered normal operation of the electric heater or not for the currently selected mode of operation.
  • a grill mounted above in the boiler room can be operated for a short time to produce the temperature jump. This is standard installed in the oven, for the operation with circulating air, however, not provided.
  • a radiant heater may be provided, either with temperatures in the range operated by incandescent heating conductors, for example 800 ° C to 1100 ° C.
  • Such a radiant heater may have, for example, exposed heating conductors and is in the DE 42 29 375 A1 described.
  • a particularly interesting variant can be achieved in that the electrical resistance of the radiant heater, if this is currently not in operation, has a large temperature dependence and thus the radiant heater or a heating element or heating resistor thereof can be used quasi even as a temperature sensor. More specifically, these are NTC or PTC effect heaters or combinations of both. Which type of heating element is more favorable for the temperature detection depends in particular on the arrangement between the temperature sensor and the heating element, which generates the temperature jump. For relatively low temperatures offers the NTC effect, for relatively high temperatures in turn the PTC effect advantages in the evaluation.
  • NTC-effect heating conductors may be doped semiconducting ceramics, preferably of doped and sintered silicon carbide (SiC), or lamps containing heating conductors, for example based on carbon (carbon fiber or carbon nanotubes).
  • Heating conductor with PTC effect for example, be designed as a so-called halogen lamps, in which case the embodiment may correspond to a lamp, with a heating conductor preferably made of tungsten or molybdenum or alloys thereof.
  • a tubular heater can be provided in the boiler room, in which a heating conductor is arranged in a jacket.
  • a hot air supply can be used as a heater.
  • a heater of this hot air supply is usually located outside the boiler room and has a fan or the like. to bring the hot air into the boiler room. If the electric heater is an oven, so can one Combination of the above-described types of heaters can be provided.
  • a radiant heater or a tubular heater is provided together with a hot air supply, wherein radiant heater or tubular heater can be used, for example, for a grill function.
  • tubular heaters it is also possible to design a tubular heater so that it can temporarily perform sensor functions.
  • tubular heaters are known in the art. However, it should be explicitly pointed out that the operation of tubular heaters with PTC effect must comply with various flicker standards.
  • a known to those skilled in the field of radiant heater variant, which is under the name HaloLight on the market and the EP 176027 A1 It can be seen in a series circuit of halogen heating elements as PTC heating elements and heating elements with "normal" horrsSdraht (for example FeCrAl, NiCr 8020 or FeNiCr3020, ).
  • gas or humidity sensors can be saved in the electric heater.
  • the method can then serve to control or regulation of the electric heater.
  • these gas or humidity sensors can be monitored, in particular malfunctions or the like .
  • an unforeseen or critical condition can be detected in the boiler room, for example, a burning of therein objects or food or food or the emergence of other gases in the this mode of operation should not arise.
  • Fig. 1 shows in a lateral schematic section of a baking oven 11 with a housing 12.
  • a door 13 allows access to the muffle or the heating chamber 15 of the oven 11.
  • In the boiler room 15 can be cooked 17, for example, a casserole or other food , which can be prepared in an oven, stand.
  • a heater 19 This is designed as a tubular heater, as it is basically known. It can be laid at least at the top of the boiler room 15 meandering or as a single loop.
  • a temperature detection 21 projects into the heating chamber 15. It can be designed as a type of temperature sensor and, just like the heater 19, can be connected to a control 23. While the controller 23 can both control the heater 19 and, under certain circumstances, only monitor its operation, the temperature detector 21 is actuated and also evaluated by the controller 23, in particular explicitly as a temperature profile with specific values for the temperature. For this purpose, temperature sensors such as, for example, resistance sensors or PT1000 sensors are suitable. An operating element 25 is connected to the controller 23, for example as a rotary knob for setting a heating power for the heater 19th
  • an oven 111 is shown in extension of the oven 11 of FIG. 1, which also has a second heater 120 in the boiler room 115 in addition to the heater 119. Furthermore, in addition to the temperature sensor 121, similar to FIG. 1, another dashed line position for a temperature sensor 121 'is shown. The position of this dashed temperature sensor 121 'is clearly further away from the upper heater 119 and a little closer to the lower heater 120th It will be discussed in more detail later. On the one hand, this greater distance means a considerably lower value for the recorded temperatures during the temperature detection. On the other hand, there is a somewhat delayed temperature detection, since the heat from the heaters must first spread to the respective position of the temperature sensor.
  • FIGS. 3 to 6 each contain information on temperatures in ° C. and the relative air humidities defined for this purpose. In total, three temperatures were recorded, namely 30 ° C, 60 ° C and 90 ° C and two humidities, namely 20% and 90%. Based on these initial conditions, temperature jumps were produced by the heaters 19 or 119.
  • the heater 120 for the bottom heat of Fig. 2 was disregarded, and their operation would not fundamentally change. Furthermore, the distance of the temperature sensor 21 and 121 was varied by the heater.
  • Fig. 3 it can be seen how, starting from the initial temperature 90 ° C, a temperature jump is generated by operation of the heater. Thereafter, the temperature at the temperature sensor rises relatively steeply for about the first 25 seconds, and then rises slightly further into a slower rise. The increase is somewhat slower for the two larger distances of 5 cm and 10 cm and, of course, reaches much lower values. After about 60 seconds, the heating is switched off again and the temperature drops accordingly.
  • the cooling rates and the cooling behavior are better evaluated, is shown in Fig. 6 for the output temperature value 60 ° C, only the cooling.
  • the cooling rate can be determined at a fixed time interval based on the temperature difference.
  • the temperature at high humidity drops more slowly than at low air humidity.
  • an evaluation of the measured data can take place.
  • the mean and standard deviation of the relative differences between the two air humidities can be calculated.
  • the mean value is smaller than the standard deviation, these are accidental measurement inaccuracies. These in turn can not be used to determine the thermal conductivity and thus not to measure the humidity. If, on the other hand, the mean value is greater than the standard deviations, this is an effect that can be used to determine the air humidity.
  • FIG. 6 may suggest otherwise at first glance, at the distances of 1 cm and 5 cm of the temperature sensor 21 from the heater 19, the differences between the measurements are smaller than the standard deviations. Thus, the experimental error is too large here to determine the thermal conductivity clearly. At a distance of 10 cm, on the other hand, the mean difference between the humidities is significantly greater than the standard deviation, so that it is possible to infer the thermal conductivity and thus the air humidity from the measured temperature.
  • a good embodiment can be achieved by an optimized arrangement of temperature sensors and heating elements, in particular also with regard to inertia, as well as a suitable sensor resolution, preferably of 1/100 K.
  • a suitable sensor resolution preferably of 1/100 K.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Stoves And Ranges (AREA)
  • Control Of Resistance Heating (AREA)
  • Control Of Heat Treatment Processes (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)
  • Electric Ovens (AREA)
  • Drying Of Solid Materials (AREA)
EP07005760A 2006-03-24 2007-03-21 Procédé de surveillance, de commande ou de réglage d'un appareil de chauffage électrique fermé Active EP1837600B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200730113T SI1837600T1 (sl) 2006-03-24 2007-03-21 Postopek nadziranja oz. krmiljenja ali reguliranja zaprte električne grelne naprave

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006014515A DE102006014515A1 (de) 2006-03-24 2006-03-24 Verfahren zur Überwachung bzw. Steuerung oder Regelung eines geschlossenen Elektrowärmegerätes

Publications (3)

Publication Number Publication Date
EP1837600A2 true EP1837600A2 (fr) 2007-09-26
EP1837600A3 EP1837600A3 (fr) 2009-01-28
EP1837600B1 EP1837600B1 (fr) 2009-09-09

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EP07005760A Active EP1837600B1 (fr) 2006-03-24 2007-03-21 Procédé de surveillance, de commande ou de réglage d'un appareil de chauffage électrique fermé

Country Status (5)

Country Link
EP (1) EP1837600B1 (fr)
AT (1) ATE442554T1 (fr)
DE (2) DE102006014515A1 (fr)
ES (1) ES2332946T3 (fr)
SI (1) SI1837600T1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2886024A1 (fr) * 2013-12-18 2015-06-24 ELECTROLUX PROFESSIONAL S.p.A. Ensemble de détection amélioré pour appareils électriques
EP3309460A1 (fr) * 2016-10-12 2018-04-18 Miele & Cie. KG Procédé automatique de cuisson des aliments au moyen d'un appareil de cuisson
CN112938937A (zh) * 2021-03-25 2021-06-11 安徽晟捷新能源科技有限公司 一种基于碳纳米管生产的气体加热流量控制设备

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202009004622U1 (de) 2009-04-03 2009-07-09 Lammering, Udo Steuervorrichtung für eine Klimatisierungseinheit
DE102019202389A1 (de) * 2019-02-21 2020-08-27 BSH Hausgeräte GmbH Gargerät mit Dampfbehandlungsfunktion
DE102021207441B3 (de) 2021-07-13 2022-06-02 E.G.O. Elektro-Gerätebau GmbH Verfahren zum Betrieb einer Waschmaschine und Waschmaschine

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD237550A1 (de) * 1985-05-21 1986-07-16 Univ Dresden Tech Verfahren und vorrichtung zur feuchtebestimmung
GB2207514A (en) * 1987-06-12 1989-02-01 Flour Milling & Baking Res Apparatus for measuring atmospheric humidity in ovens
FR2679657A1 (fr) * 1991-07-26 1993-01-29 Cogia Procede et dispositif de detection de vapeur d'eau dans un volume d'air et generateur de vapeur et four de cuisson a la vapeur utilisant ceux-ci.
EP0567813A2 (fr) * 1992-04-29 1993-11-03 ZANUSSI GRANDI IMPIANTI S.p.A. Dispositif de mesure d'humidité à l'intérieur de fours, en particuliers de fours de cuisson d'aliments
US5689060A (en) * 1992-03-06 1997-11-18 Matsushita Electric Industrial Co., Ltd. Humidity measuring device and a heat cooker employing the device
DE10143841A1 (de) * 2001-09-06 2003-04-03 Neubauer Kurt Maschf Gargerät mit Feuchtemesseinrichtung und Verfahren zur Feuchtemessung in einem Gargerät
EP1300079A2 (fr) * 2001-10-06 2003-04-09 Maschinenfabrik Kurt Neubauer GmbH & Co Appareil de cuisson avec un dispositif pour la mesure d'humidité et procédé pour la mesure d'humidité dans un appareil de cuisson
FR2849167A1 (fr) * 2002-12-23 2004-06-25 Premark Feg Llc Four pour la cuisson d'aliments
DE10335295A1 (de) * 2003-07-28 2005-03-03 Igv Institut Für Getreideverarbeitung Gmbh Verfahren und Vorrichtung zur Steuerung von Backparametern
DE10323653B3 (de) * 2003-05-26 2005-03-24 Rational Ag Garprozessfühler zur Bestimmung zumindest der Temperaturleitzahl und/oder der spezifischen Wärmeleitfähigkeit zur Gargutarterkennung und Verfahren hierfür

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD237550A1 (de) * 1985-05-21 1986-07-16 Univ Dresden Tech Verfahren und vorrichtung zur feuchtebestimmung
GB2207514A (en) * 1987-06-12 1989-02-01 Flour Milling & Baking Res Apparatus for measuring atmospheric humidity in ovens
FR2679657A1 (fr) * 1991-07-26 1993-01-29 Cogia Procede et dispositif de detection de vapeur d'eau dans un volume d'air et generateur de vapeur et four de cuisson a la vapeur utilisant ceux-ci.
US5689060A (en) * 1992-03-06 1997-11-18 Matsushita Electric Industrial Co., Ltd. Humidity measuring device and a heat cooker employing the device
EP0567813A2 (fr) * 1992-04-29 1993-11-03 ZANUSSI GRANDI IMPIANTI S.p.A. Dispositif de mesure d'humidité à l'intérieur de fours, en particuliers de fours de cuisson d'aliments
DE10143841A1 (de) * 2001-09-06 2003-04-03 Neubauer Kurt Maschf Gargerät mit Feuchtemesseinrichtung und Verfahren zur Feuchtemessung in einem Gargerät
EP1300079A2 (fr) * 2001-10-06 2003-04-09 Maschinenfabrik Kurt Neubauer GmbH & Co Appareil de cuisson avec un dispositif pour la mesure d'humidité et procédé pour la mesure d'humidité dans un appareil de cuisson
FR2849167A1 (fr) * 2002-12-23 2004-06-25 Premark Feg Llc Four pour la cuisson d'aliments
DE10323653B3 (de) * 2003-05-26 2005-03-24 Rational Ag Garprozessfühler zur Bestimmung zumindest der Temperaturleitzahl und/oder der spezifischen Wärmeleitfähigkeit zur Gargutarterkennung und Verfahren hierfür
DE10335295A1 (de) * 2003-07-28 2005-03-03 Igv Institut Für Getreideverarbeitung Gmbh Verfahren und Vorrichtung zur Steuerung von Backparametern

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2886024A1 (fr) * 2013-12-18 2015-06-24 ELECTROLUX PROFESSIONAL S.p.A. Ensemble de détection amélioré pour appareils électriques
EP3309460A1 (fr) * 2016-10-12 2018-04-18 Miele & Cie. KG Procédé automatique de cuisson des aliments au moyen d'un appareil de cuisson
CN112938937A (zh) * 2021-03-25 2021-06-11 安徽晟捷新能源科技有限公司 一种基于碳纳米管生产的气体加热流量控制设备
CN112938937B (zh) * 2021-03-25 2022-05-31 安徽晟捷新能源科技股份有限公司 一种基于碳纳米管生产的气体加热流量控制设备

Also Published As

Publication number Publication date
EP1837600B1 (fr) 2009-09-09
EP1837600A3 (fr) 2009-01-28
ES2332946T3 (es) 2010-02-15
ATE442554T1 (de) 2009-09-15
SI1837600T1 (sl) 2010-01-29
DE102006014515A1 (de) 2007-09-27
DE502007001466D1 (de) 2009-10-22

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