EP0528250A2 - Automatable process of pyrolytic self-cleaning - Google Patents
Automatable process of pyrolytic self-cleaning Download PDFInfo
- Publication number
- EP0528250A2 EP0528250A2 EP92113231A EP92113231A EP0528250A2 EP 0528250 A2 EP0528250 A2 EP 0528250A2 EP 92113231 A EP92113231 A EP 92113231A EP 92113231 A EP92113231 A EP 92113231A EP 0528250 A2 EP0528250 A2 EP 0528250A2
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- European Patent Office
- Prior art keywords
- sensor
- pyrolysis
- evaluation unit
- pyrolytic self
- muffle
- Prior art date
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- 238000004140 cleaning Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000000197 pyrolysis Methods 0.000 claims abstract description 46
- 238000011156 evaluation Methods 0.000 claims abstract description 34
- 238000010411 cooking Methods 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000011109 contamination Methods 0.000 claims description 28
- 239000004020 conductor Substances 0.000 claims description 4
- 230000000977 initiatory effect Effects 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 230000001419 dependent effect Effects 0.000 claims description 2
- 229930195733 hydrocarbon Natural products 0.000 claims description 2
- 150000002430 hydrocarbons Chemical class 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims 1
- 239000001257 hydrogen Substances 0.000 claims 1
- 229910052739 hydrogen Inorganic materials 0.000 claims 1
- 238000004458 analytical method Methods 0.000 abstract 1
- 239000000356 contaminant Substances 0.000 description 2
- 239000007857 degradation product Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 239000007859 condensation product Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010794 food waste Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 244000144980 herd Species 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
- 235000019871 vegetable fat Nutrition 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- F24C14/00—Stoves or ranges having self-cleaning provisions, e.g. continuous catalytic cleaning or electrostatic cleaning
- F24C14/02—Stoves or ranges having self-cleaning provisions, e.g. continuous catalytic cleaning or electrostatic cleaning pyrolytic type
Definitions
- the invention relates to an automatable pyrolytic self-cleaning method for stoves, the muffle of which can be operated by a heating element arranged in at least one wall area and possibly with additional forced-air heating, the muffle being ventilated by a forced-air fan and equipped with means for pyrolytic self-cleaning.
- This pollution essentially consists of three components:
- the muffle walls are heated to a temperature of 480 to 500 ° C during the passage of a predetermined time-temperature profile and kept at a high temperature for a certain time, this time being an empirical value corresponds and does not reflect the actual conditions of the muffle contamination.
- the relatively long-chain molecules of the dirt adhering to the walls of the muffle are subjected to a thermal cracking process due to the long-term heating to over 450 ° C and are thus converted into relatively short-chain degradation products, e.g. water, short hydrocarbons, aromatics and ash residues.
- the gaseous degradation products are removed from the stove with the ventilation during self-cleaning. After self-cleaning, the remaining residues can be removed from the stove as ash.
- the object of the invention is now to implement pyrolysis start, pyrolysis implementation and the end of pyrolysis in a sensor-controlled manner, depending on the actual contamination phase, and thus possibly to be automated.
- the solution to this problem according to the invention is characterized in that in the cooking chamber an operational oven-contamination value is arranged, that an evaluation unit connected on the input side to the contamination sensor initiates or recommends the start of pyrolysis, that a gas sensor connected to the evaluation unit for pyrolytic self-cleaning is arranged in the exhaust air path of the muffle, that the evaluation unit analyzes the sensor signals with a logic system adapted to the pyrolysis operation, that after a typical pyrolysis operating time the evaluation unit detects a contamination type-dependent pyrolysis minimum temperature and determines an optimized total pyrolysis time and that the evaluation unit ends the pyrolytic self-cleaning after a total pyrolysis time caused by the type of contamination.
- An advantageous embodiment of the invention is characterized in that the evaluation circuit frequency-converts, digitizes, enumerates, stores and concatenates the input values of the contamination sensor, that the evaluation circuit signals a degree of contamination on the output side and recommends or carries out pyrolysis initiation.
- a further advantageous embodiment of the invention is characterized in that the evaluation unit, which is partially equipped with an unsharp logic system, predetermines the total pyrolysis time required depending on the degree of contamination, is corrected in relation to the sensor signal, and switches off the heating elements after these times have elapsed.
- the sensor 2 indicated in the cooking chamber mainly works as a capacitive contamination sensor, one of the possible embodiments of the contamination sensor being determined in that the sensor consists of at least two conductor tracks which are arranged insulated from one another on an enamelled metal sheet, the two sensor conductor tracks U- Have shape and are arranged opposite each other in such a way that one U-leg dips into the open, opposite U.
- the sensor 2 is preferably arranged in a lateral wall area of the muffle.
- the sensor 2 On the output side, the sensor 2 is connected to the part of the evaluation unit that compresses the values of the contamination sensor 2 until a pyrolysis start is given objectively.
- This part of the evaluation unit is identified by 4.
- the evaluation unit 4 treats the input values of the contamination sensor by converting, digitizing, counting, storing and linking this frequency, then signaling a degree of contamination on the output side and recommending or carrying out pyrolysis initiation.
- the part of the evaluation unit that is necessary for the pyrolysis procedure is connected to the gas sensor, which is arranged in the exhaust air path of the furnace muffle.
- the evaluation unit 5 uses an adapted logic system to analyze these sensor signals and, after a typical pyrolysis operating time, forms a minimum pyrolysis temperature due to the type of contamination and an optimized total pyrolysis time.
- the evaluation unit 4, 5, which is partially equipped with an unsharp logic system predetermines the total pyrolysis time required depending on the degree of soiling, corrects it in relation to the sensor signal, and switches off the heating elements after these times have expired, the circulating air also being switched off. This situation is realized on the output side according to FIG. 1 with the evaluation unit part 5, which is led to a controller 6.
- FIG. 2 and FIG. 3 represent diagrams which, in parametric assignment, represent different contamination values with the associated sensor signal profiles, which are generated by the gas sensor arranged in the exhaust air duct of the cooking space.
- An automatable, pyrolytic self-cleaning process which is equipped with a sensor-controlled pyrolysis start and a sensor-controlled pyrolysis implementation, with an evaluation unit that has sharp and fuzzy logic, gives the cookers equipped with it an appropriate comfort.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Baking, Grill, Roasting (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Cleaning Or Drying Semiconductors (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Physical Vapour Deposition (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein automatisierbares pyrolytisches Selbstreinigungsverfahren für Herde, deren Muffel durch ein in wenigstens einem Wandbereich angeordnetem Heizelement und ggf. mit zusätzlicher Umluftheizung betreibbar ist, wobei die Muffel durch ein Umluftgebläse belüftbar und mit Mitteln zur pyrolytischen Selbstreinigung ausgerüstet ist.The invention relates to an automatable pyrolytic self-cleaning method for stoves, the muffle of which can be operated by a heating element arranged in at least one wall area and possibly with additional forced-air heating, the muffle being ventilated by a forced-air fan and equipped with means for pyrolytic self-cleaning.
Beim Braten, Garen und Backen werden die Innenseiten einer Herdmuffel in unterschiedlicher Weise verschmutzt. Diese Verschmutzung besteht im wesentlichen aus drei Komponenten:When roasting, cooking and baking, the inside of a muffle is soiled in different ways. This pollution essentially consists of three components:
Fettspritzer tierischer und pflanzlicher Art, anklebende Gargutreste an den Muffelwänden und Kondensation von Wrasenbestandteilen an den Muffelwänden.Grease splashes of animal and vegetable type, sticky food residues on the muffle walls and condensation of vapor components on the muffle walls.
Die Möglichkeit, mit Hilfe pyrolytischer Selbstreinigung einer Garraumverschmutzung über ein zumutbares Maß vorzubeugen, bzw. eine solche Verschmutzung zu beseitigen, ist hinlänglich bekannt.The possibility of using a pyrolytic self-cleaning function to prevent contamination of the cooking space to a reasonable extent, or to remove such contamination, is well known.
Bei der konventionellen pyrolytischen Selbstreinigung von Herden, wie sie bisher betrieben wurde, werden die Muffelwände beim Durchlauf eines vorgegebenen Zeit-Temperatur-Profils auf eine Temperatur von 480 bis 500°C aufgeheizt und für gewisse Zeit auf hoher Temperatur gehalten, wobei diese Zeit einem Erfahrungswert entspricht und nicht die tatsächlichen Verhältnisse der Muffelverschmutzung wiedergibt. Die relativ langkettigen Moleküle der an den Wänden der Muffel haftenden Verschmutzungen werden durch die langandauernde Erhitzung auf über 450°C einem thermischen Crack-Verfahren unterworfen und so zu relativ kurzkettigen Abbauprodukten, beispielsweise Wasser, kurze Kohlenwasserstoffe, Aromate und zu Ascherückständen umgesetzt. Die gasförmigen Abbauprodukte werden während der Selbstreinigung mit der Entlüftung aus dem Herd geführt. Nach der Selbstreinigung können die verbleibenden Rückstände als Asche dem Herd entnommen werden.In the conventional pyrolytic self-cleaning of cookers, as has been used up to now, the muffle walls are heated to a temperature of 480 to 500 ° C during the passage of a predetermined time-temperature profile and kept at a high temperature for a certain time, this time being an empirical value corresponds and does not reflect the actual conditions of the muffle contamination. The relatively long-chain molecules of the dirt adhering to the walls of the muffle are subjected to a thermal cracking process due to the long-term heating to over 450 ° C and are thus converted into relatively short-chain degradation products, e.g. water, short hydrocarbons, aromatics and ash residues. The gaseous degradation products are removed from the stove with the ventilation during self-cleaning. After self-cleaning, the remaining residues can be removed from the stove as ash.
Die Aufgabe der Erfindung besteht nunmehr darin, Pyrolysestart, Pyrolysedurchführung und die Beendigung der Pyrolyse in Abhängigkeit von der realen Verschmutzungsphase sensorgesteuert und damit ggf. automatisierbar zu realisieren.The object of the invention is now to implement pyrolysis start, pyrolysis implementation and the end of pyrolysis in a sensor-controlled manner, depending on the actual contamination phase, and thus possibly to be automated.
Die erfindungsgemäße Lösung dieser Aufgabe ist dadurch gekennzeichnet, daß im Garraum eine betriebsbedingte Backofen-Verschmutzungswerte erfassende Sensorik angeordnet ist, daß eine eingangsseitig mit dem Verschmutzungssensor verbundene Auswerteeinheit den Pyrolysestart einleitet oder empfiehlt, daß ein mit der Auswerteeinheit für pyrolytische Selbstreinigung verbundener Gassensor im Abluftweg der Muffel angeordnet ist, daß die Auswerteeinheit die Sensorsignale mit einem auf den Pyrolysebetrieb angepaßten Logiksystem analysiert, daß die Auswerteeinheit aus den Sensorsignalen nach einer typischen Pyrolyse-Betriebszeit eine verschmutzungsart bedingte Pyrolyse-Mindesttemperatur und eine optimierte Pyrolyse-Gesamtzeit bestimmt und daß die Auswerteeinheit die pyrolytische Selbstreinigung nach einer verschmutzungsartbedingten Pyrolyse-Gesamtzeit beendet.The solution to this problem according to the invention is characterized in that in the cooking chamber an operational oven-contamination value is arranged, that an evaluation unit connected on the input side to the contamination sensor initiates or recommends the start of pyrolysis, that a gas sensor connected to the evaluation unit for pyrolytic self-cleaning is arranged in the exhaust air path of the muffle, that the evaluation unit analyzes the sensor signals with a logic system adapted to the pyrolysis operation, that after a typical pyrolysis operating time the evaluation unit detects a contamination type-dependent pyrolysis minimum temperature and determines an optimized total pyrolysis time and that the evaluation unit ends the pyrolytic self-cleaning after a total pyrolysis time caused by the type of contamination.
Eine vorteilhafte Ausgestaltung der Erfindung ist dadurch gekennzeichnet, daß die Auswerteschaltung die Eingangswerte des Verschmutzungssensors frequenzumsetzt, digitalisiert, aufzählt, speichert und verkettet, daß die Auswerteschaltung einen Verschmutzungsgrad ausgabeseitig signalisiert und eine Pyrolyseeinleitung empfiehlt oder durchführt.An advantageous embodiment of the invention is characterized in that the evaluation circuit frequency-converts, digitizes, enumerates, stores and concatenates the input values of the contamination sensor, that the evaluation circuit signals a degree of contamination on the output side and recommends or carries out pyrolysis initiation.
Eine weitere, vorteilhafte Ausgestaltung der Erfindung ist dadurch gekennzeichnet, daß die teilweise mit einem unscharfen Logiksystem ausgestattete Auswerteeinheit in Abhängigkeit vom Verschmutzungsgrad die notwendige Pyrolyse-Gesamtzeit vorbestimmt, sensorsignalbezogen nachkorrigiert und nach Ablauf dieser Zeiten die Heizelemente abschaltet.A further advantageous embodiment of the invention is characterized in that the evaluation unit, which is partially equipped with an unsharp logic system, predetermines the total pyrolysis time required depending on the degree of contamination, is corrected in relation to the sensor signal, and switches off the heating elements after these times have elapsed.
Weitere, vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen dargestellt.Further advantageous embodiments of the invention are presented in the subclaims.
Ein Ausführungsbeispiel nach der Erfindung ist im folgenden anhand der Zeichnung näher beschrieben. Es zeigt:
- Fig. 1
- Ein Blockschaltbild des Pyrolyseverfahrens,
- Fig. 2
- einen Sensorsignalverlauf während der Pyrolysezeit bei verschiedenen Verschmutzungen,
- Fig. 3
- Sensorsignale während des Anstieges der Pyrolysetemperatur bei verschiedenen Verschmutzungen.
- Fig. 1
- A block diagram of the pyrolysis process,
- Fig. 2
- a sensor signal curve during the pyrolysis time with various contaminants,
- Fig. 3
- Sensor signals during the rise in the pyrolysis temperature with various contaminants.
Gemäß Fig. 1 ist ein Herd 1, ein im Garraum befindlicher Sensor 2, eine Pyrolyse-Displayeinheit 3, eine Auswerteeinheit 4, 5 und eine Steuerung 6 erkennbar. Der im Garraum angedeutete Sensor 2 arbeitet vorwiegend als kapazitiver Verschmutzungssensor, wobei eine der möglichen Ausführungsformen des Verschmutzungssensors dadurch bestimmt ist, daß der Sensor aus mindestens zwei Leiterbahnen besteht, die auf einem emaillierten Metallblättchen voneinander isoliert angeordnet sind, wobei die beiden Sensor-Leiterbahnen U-Form besitzen und sich gegenüberstehend derart angeordnet sind, daß jeweils ein U-Schenkel in das offene, gegenüberliegende U eintaucht. Innerhalb des Garraumes wird der Sensor 2 vorzugsweise in einem seitlichen Wandbereich der Muffel angeordnet. Ausgangsseitig ist der Sensor 2 mit dem Teil der Auswerteeinheit verbunden, der die Werte des Verschmutzungssensors 2 solange verdichtet, bis ein Pyrolysestart objektiv gegeben ist. Dabei ist dieser Teil der Auswerteeinheit mit 4 gekennzeichnet. Die Auswerteeinheit 4 behandelt die Eingangswerte des Verschmutzungssensors indem sie diese Frequenz umsetzt, digitalisiert, aufzählt, speichert und verkettet, anschließend einen Verschmutzungsgrad ausgabeseitig signalisiert und eine Pyrolyseeinleitung empfiehlt oder durchführt.1, a
Der Teil der Auswerteeinheit, der für die Pyrolyse-Durchführung notwendig ist, gemäß Fig. 1 als 5 bezeichnet, ist mit dem Gassensor, der im Abluftweg der Ofenmuffel angeordnet ist, verbunden. Die Auswerteeinheit 5 analysiert durch ein angepaßtes Logiksystem diese Sensorsignale, bildet aus diesen nach einer typischen Pyrolyse-Betriebszeit eine verschmutzungsartbedingte Pyrolyse-Mindesttemperatur und eine optimierte Pyrolyse-Gesamtzeit. Für das pyrolytische Selbstreinigungsverfahren ist es wesentlich, daß die teilweise mit einem unscharfen Logiksystem ausgestattete Auswerteeinheit 4, 5 in Abhängigkeit vom Verschmutzungsgrad die notwendige Pyrolyse-Gesamtzeit vorbestimmt, sensorsignalbezogen nachkorrigiert und nach Ablauf dieser Zeiten die Heizelemente abschaltet, wobei die Umluft ebenfalls abgeschaltet wird. Dieser Sachverhalt ist gemäß Fig. 1 ausgangsseitig mit dem Auswerteeinheitsteil 5, der auf eine Steuerung 6 geführt ist, realisiert.The part of the evaluation unit that is necessary for the pyrolysis procedure, designated as 5 according to FIG. 1, is connected to the gas sensor, which is arranged in the exhaust air path of the furnace muffle. The evaluation unit 5 uses an adapted logic system to analyze these sensor signals and, after a typical pyrolysis operating time, forms a minimum pyrolysis temperature due to the type of contamination and an optimized total pyrolysis time. For the pyrolytic self-cleaning process, it is essential that the evaluation unit 4, 5, which is partially equipped with an unsharp logic system, predetermines the total pyrolysis time required depending on the degree of soiling, corrects it in relation to the sensor signal, and switches off the heating elements after these times have expired, the circulating air also being switched off. This situation is realized on the output side according to FIG. 1 with the evaluation unit part 5, which is led to a
Fig. 2 und Fig. 3 stellen Diagramme dar, die in parametrischer Zuordnung verschiedene Verschmutzungswerte mit den dazugehörigen Sensorsignalverläufen wiedergeben, die durch den im Abluftkanal des Garraumes angeordneten Gassensor erzeugt werden.FIG. 2 and FIG. 3 represent diagrams which, in parametric assignment, represent different contamination values with the associated sensor signal profiles, which are generated by the gas sensor arranged in the exhaust air duct of the cooking space.
Gemäß Fig. 2 ist eine Kurvenschar erkennbar, die mit verschiedenen Verschmutzungsarten als Parameter den Verlauf des Gassensorsignals über die Pyrolysezeit qualitativ darstellt. Für den automatisierten Pyrolysebetrieb ist es zweckmäßig, eine mit unscharfer und scharfer Logik ausgerüstete Auswerteeinheit 4, 5 anzuordnen, die durch ständige Abfrage aller Sensorsignale die jeweils erforderlichen Regelschritte einleitet. Grundlage dieser Logikeinheiten, die sich in der Auswerteeinheit 4, 5 befinden, sind u.a. die vom Gassensor gelieferten Daten gemäß der Figuren 2, 3. So ist gemäß Fig. 1 weiterhin entnehmbar, daß gleiche Verschmutzungstypen nach einer bestimmten Pyrolysedauer ihre Maxima nahezu gleichzeitig erreichen. Man kann davon ausgehen, daß mit Erreichen der notwendigen Pyrolysetemperatur, d.h. der Temperatur, die dem Verschmutzungsgrad entsprechend ausreichende Crackkraft besitzt, keine längeren Aufheizzeiten als eine Stunde erforderlich sein werden. Das ist davon abhängig, in welchem Maße die Verschmutzung komplizierte Zusammensetzung bezüglich tierischer und pflanzlicher Fette, klebender Gargutreste und komplizierte Kondensationsprodukte von Wrasenbestandteilen besitzt und von welcher Ausgangstemperatur her die Pyrolyse gestartet wird.2, a family of curves can be seen, which qualitatively represents the course of the gas sensor signal over the pyrolysis time with various types of contamination as parameters. For automated pyrolysis operation, it is expedient to arrange an evaluation unit 4, 5 equipped with fuzzy and sharp logic, which initiates the required control steps by constantly querying all sensor signals. Basis of these logic units, which are in the Evaluation unit 4, 5 are, among other things, the data supplied by the gas sensor according to FIGS. 2, 3. Thus, according to FIG. 1, it can also be seen that the same types of contamination reach their maxima almost simultaneously after a certain pyrolysis time. It can be assumed that once the necessary pyrolysis temperature has been reached, ie the temperature which has a sufficient cracking power in accordance with the degree of contamination, heating up times longer than one hour will not be necessary. This depends on the extent to which the contamination has a complicated composition with regard to animal and vegetable fats, sticky cooking product residues and complicated condensation products of vapor components and from which starting temperature the pyrolysis is started.
Die Gassensorsignale, bezogen auf den Temperaturverlauf, sind gemäß Fig. 3 dargestellt. Es ist ersichtlich, daß die Maxima der Sensorsignale bei Temperaturen auftreten, die für die entsprechende Garraumverschmutzung typische Reinigungstemperaturen sind. Durch den Gassensor im Abluftkanal des Garraumes können Aussagen zu folgenden Punkten, das Pyrolyseverfahren betreffend, gemacht werden:
- Höhe der notwendigen Pyrolysetemperatur,
- Angabe zur notwendigen Pyrolysedauer,
- Vorgaben für Be- und Entlüftung der Ofenmuffel,
- Angaben zur Menge und Geschwindigkeit der Umluft,
- mögliche Erkennung von zufällig im Brat- und Backrohr vorhandenen Fremdgegenständen.
- Level of the necessary pyrolysis temperature,
- Information on the necessary pyrolysis time,
- Specifications for ventilation of the furnace muffle,
- Information on the quantity and speed of the circulating air,
- Possible detection of foreign objects accidentally present in the roasting and baking oven.
Die durch die Sensortechnik im Abluftkanal gewonnenen Daten bestimmen die Ausrüstung der Auswerteeinheit Teil 5 bezüglich ihres Logiksystems und lassen eine vorteilhafte Verwendung unscharfer Logik erkennen. Ein solcherart ausgestattetes automatisierbares, pyrolytisches Selbstreinigungsverfahren besitzt gegenüber den bisherigen Verfahrenweisen bei pyrolytischer Selbstreinigung, die darin bestanden, daß ein starres Zeit-Temperaturprofil durchfahren wurde, d.h., der Herd wurde eine bestimmte empirisch ermittelte Zeit lang mit hoher Temperatur betrieben, folgende Vorteile:
- Der Energieverbrauch wird stark verringert, da die vorhandene Verschmutzung nur sehr selten den Maximalwert erreicht, für den das Zeit-Temperatur-Profil früher aber ausgelegt war.
- Der Herd wird weit weniger belastet, dadurch vergrößert sich die Lebensdauer der Emaille der Muffel.
- die Brandgefahr im Fall von Bedienungsfehlern wird verringert, da die Sensorik Fehlbeschickungen im Garraum analysiert.
- Energy consumption is greatly reduced since the existing pollution very rarely reaches the maximum value for which the time-temperature profile was previously designed.
- The stove is stressed far less, which increases the lifespan of the enamel of the muffle.
- the risk of fire in the event of operating errors is reduced because the sensors analyze incorrect loads in the cooking space.
Ein automatisierbares, pyrolytisches Selbstreinigungsverfahren, das mit einem sensorgesteuerten Pyrolysestart und einer sensorgesteuerten Pyrolysedurchführung ausgestattet ist, wobei eine Auswerteeinheit, die scharfe und unscharfe Logik besitzt, vorhanden ist, verleiht den damit ausgerüsteten Herden einen zweckentsprechenden Komfort.An automatable, pyrolytic self-cleaning process, which is equipped with a sensor-controlled pyrolysis start and a sensor-controlled pyrolysis implementation, with an evaluation unit that has sharp and fuzzy logic, gives the cookers equipped with it an appropriate comfort.
Claims (9)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4127390A DE4127390A1 (en) | 1991-08-19 | 1991-08-19 | AUTOMATED, PYROLYTIC SELF-CLEANING PROCESS |
| DE4127390 | 1991-08-19 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0528250A2 true EP0528250A2 (en) | 1993-02-24 |
| EP0528250A3 EP0528250A3 (en) | 1993-04-14 |
| EP0528250B1 EP0528250B1 (en) | 1995-02-01 |
Family
ID=6438611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92113231A Expired - Lifetime EP0528250B1 (en) | 1991-08-19 | 1992-08-03 | Automatable process of pyrolytic self-cleaning |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0528250B1 (en) |
| AT (1) | ATE118083T1 (en) |
| DE (2) | DE4127390A1 (en) |
| ES (1) | ES2068658T3 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19606571A1 (en) * | 1996-02-22 | 1997-08-28 | Gaggenau Werke | Baking oven with pyrolytic cleaning |
| EP2276326A1 (en) * | 2009-07-15 | 2011-01-19 | Samsung Electronics Co., Ltd. | Pollution sensor, cooking apparatus having sensor for detecting pollution, and control method of cooking apparatus |
| EP2615375A1 (en) * | 2012-01-11 | 2013-07-17 | BSH Bosch und Siemens Hausgeräte GmbH | Cooking device with sensor for the cooking chamber |
| WO2014102074A1 (en) * | 2012-12-26 | 2014-07-03 | Arcelik Anonim Sirketi | Pyrolytic oven |
| DE102017206058A1 (en) | 2017-04-10 | 2018-10-11 | BSH Hausgeräte GmbH | Determining a degree of contamination in a cooking chamber |
| EP3495742A1 (en) * | 2017-12-11 | 2019-06-12 | Vestel Elektronik Sanayi ve Ticaret A.S. | Arrangement for self-cleaning oven |
| DE102016104865B4 (en) | 2016-03-16 | 2022-07-07 | Miele & Cie. Kg | Method for operating a cooking appliance |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4321952B4 (en) * | 1993-07-01 | 2004-05-27 | BSH Bosch und Siemens Hausgeräte GmbH | Stove with pyrolytic self-cleaning |
| DE102006013093B3 (en) | 2006-03-20 | 2007-04-12 | Miele & Cie. Kg | Pyrolysis cleaning control process for oven involves measuring oxygen concentration, comparing with boundary value and operating oven without heat |
| EP4034950A1 (en) | 2019-09-27 | 2022-08-03 | Ecolab USA Inc. | Validation of addition of cleaning chemistry to self-clean oven |
| DE102023205653A1 (en) | 2023-06-16 | 2024-12-19 | BORA - Vertriebs GmbH & Co KG | Cooking device and method for operating a cooking device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4481404A (en) * | 1982-12-22 | 1984-11-06 | General Electric Company | Turn-off control circuit for self-cleaning ovens |
| EP0380733A1 (en) * | 1989-01-31 | 1990-08-08 | Matsushita Electric Industrial Co., Ltd. | Cooking oven having function to automatically clean soils attached to inner walls thereof |
| EP0459131A1 (en) * | 1990-05-31 | 1991-12-04 | Bosch-Siemens HausgerÀ¤te GmbH | Pyrolitically cleaned cooking oven |
| DE9112786U1 (en) * | 1991-10-14 | 1991-12-12 | Bosch-Siemens Hausgeräte GmbH, 8000 München | Display of the degree of stove contamination |
-
1991
- 1991-08-19 DE DE4127390A patent/DE4127390A1/en not_active Withdrawn
-
1992
- 1992-08-03 ES ES92113231T patent/ES2068658T3/en not_active Expired - Lifetime
- 1992-08-03 DE DE59201331T patent/DE59201331D1/en not_active Expired - Fee Related
- 1992-08-03 EP EP92113231A patent/EP0528250B1/en not_active Expired - Lifetime
- 1992-08-03 AT AT92113231T patent/ATE118083T1/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4481404A (en) * | 1982-12-22 | 1984-11-06 | General Electric Company | Turn-off control circuit for self-cleaning ovens |
| EP0380733A1 (en) * | 1989-01-31 | 1990-08-08 | Matsushita Electric Industrial Co., Ltd. | Cooking oven having function to automatically clean soils attached to inner walls thereof |
| EP0459131A1 (en) * | 1990-05-31 | 1991-12-04 | Bosch-Siemens HausgerÀ¤te GmbH | Pyrolitically cleaned cooking oven |
| DE9112786U1 (en) * | 1991-10-14 | 1991-12-12 | Bosch-Siemens Hausgeräte GmbH, 8000 München | Display of the degree of stove contamination |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19606571A1 (en) * | 1996-02-22 | 1997-08-28 | Gaggenau Werke | Baking oven with pyrolytic cleaning |
| DE19606571C2 (en) * | 1996-02-22 | 2001-02-08 | Gaggenau Werke | Oven with pyrolytic cleaning and method for operating such an oven |
| EP2276326A1 (en) * | 2009-07-15 | 2011-01-19 | Samsung Electronics Co., Ltd. | Pollution sensor, cooking apparatus having sensor for detecting pollution, and control method of cooking apparatus |
| EP2615375A1 (en) * | 2012-01-11 | 2013-07-17 | BSH Bosch und Siemens Hausgeräte GmbH | Cooking device with sensor for the cooking chamber |
| WO2014102074A1 (en) * | 2012-12-26 | 2014-07-03 | Arcelik Anonim Sirketi | Pyrolytic oven |
| DE102016104865B4 (en) | 2016-03-16 | 2022-07-07 | Miele & Cie. Kg | Method for operating a cooking appliance |
| DE102017206058A1 (en) | 2017-04-10 | 2018-10-11 | BSH Hausgeräte GmbH | Determining a degree of contamination in a cooking chamber |
| WO2018188912A1 (en) | 2017-04-10 | 2018-10-18 | BSH Hausgeräte GmbH | Determining a degree of contamination in a cooking chamber |
| EP3495742A1 (en) * | 2017-12-11 | 2019-06-12 | Vestel Elektronik Sanayi ve Ticaret A.S. | Arrangement for self-cleaning oven |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2068658T3 (en) | 1995-04-16 |
| DE4127390A1 (en) | 1993-02-25 |
| EP0528250B1 (en) | 1995-02-01 |
| DE59201331D1 (en) | 1995-03-16 |
| EP0528250A3 (en) | 1993-04-14 |
| ATE118083T1 (en) | 1995-02-15 |
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