EP1162402A2 - Method for monitoring the operation of a steam generator for cooking apparatus - Google Patents
Method for monitoring the operation of a steam generator for cooking apparatus Download PDFInfo
- Publication number
- EP1162402A2 EP1162402A2 EP01113934A EP01113934A EP1162402A2 EP 1162402 A2 EP1162402 A2 EP 1162402A2 EP 01113934 A EP01113934 A EP 01113934A EP 01113934 A EP01113934 A EP 01113934A EP 1162402 A2 EP1162402 A2 EP 1162402A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- steam generator
- water
- fresh water
- filling
- operating parameter
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
- F22B1/284—Methods of steam generation characterised by form of heating method in boilers heated electrically with water in reservoirs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/42—Applications, arrangements, or dispositions of alarm or automatic safety devices
Definitions
- the invention relates to a method for monitoring the operation of a steam generator for cooking appliances.
- Cooking appliances in particular combi steamers, in which those to be prepared Food is cooked using steam and hot air, usually have a steam generator that the for the steaming process provides the necessary steam.
- EP 0 383 327 A1 describes a steam generator for cooking devices known with a descaling device, in which in adjustable Intervals depending on the operating time and / or the temperature of the heating device automatically Flushing the steam generator and thus a discharge from accumulating on the bottom of the steam generator Lime dividing takes place. As a result, only those of the Removed limescale from walls or heating surfaces become. The flushing takes place in the immediate vicinity of the Bottom of the steam generator, whereby these sediment parts are discharged become.
- the consequence of increased mineral concentrations in the water is not just the calcification of the steam generator, but also a failure of the level monitoring in the steam generator based on the electrical conductivity due to the entering Foaming because foam is also electrically conductive is.
- the level electrodes can then no longer measure actual water level as a distinction not between foam and water through these electrodes is possible.
- the level monitoring electrodes display a water level that is actually is absent, causing the water level to drop below Heating surfaces sink, causing the heating surfaces to overheat leads. In this state, the water stops when there is no water Boiling process, causing the foam to collapse again, and then the missing water report is often too late comes. Accordingly, such a process does not only lead to Damage to the steam generator and in particular its heating surfaces, but also to interrupt the cooking process due to lack of steam production.
- a steam generator can solve the problems associated with the Foaming due to the high degree of hardness of the water related, not solve.
- This known device thus does not take into account the hardness of the water or the degree of calcification of the steam generator, but removed only at adjustable intervals on the bottom of the steam generator accumulating, loose limescale.
- the object of the invention is to demonstrate a method with whose help has the disadvantages of hard water, which are particularly related to foam formation, largely avoided, that is, the risk of calcification and a failure to report due to foaming counteracting overheating of the heating surfaces.
- This object is achieved in that during the operation of the steam generator at least a substantial one Operating parameters of the same measured, the measured. Actual value compared with a target value and the result of the Comparison as a controlled variable or control variable for the remedy the cause of the deviation or for switching off the Steam generator is used and that the respective target value detected in an unaffected steam generator and is saved.
- the respective target value for each operating parameter So with a new steam generator or with a carefully decalcified steam generator in the first undisturbed operating phase determined and serves thus as a comparison value for later measurements during the Operation of a steam generator.
- control variable or control variable obtained is preferred for carrying out a water changer or a descaling process used.
- the boiling temperature is another important operating parameter of water in the steam generator, from height above depends on the sea level, the filling time between those of the level monitoring devices specified low and flood levels of the steam generator, the filling time up to the maximum after complete emptying of the Steam generator and the rate of temperature change the water in the steam generator for a given heating output, that means with different heating outputs.
- This list essential operating parameter is not conclusive, but only includes those who prefer the Implementation of the method according to the invention considered become. This when you start up a Steam generator measured and stored target values are later measured with the then measured Actual values compared. The result of this comparison represents a controlled variable or a control variable, which then the interventions in the operating procedure described below of a steam generator.
- the safety when operating the steam generator is also at simple embodiment increased by the fact that a constant Period and an amount of water less than that amount of water evaporated during this period, for injecting or spraying water into the steam generator is set. This will cause foaming and at the same time avoid overfilling the steam generator.
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren zum Überwachen des Betriebes eines Dampferzeugers für Gargeräte.The invention relates to a method for monitoring the operation of a steam generator for cooking appliances.
Gargeräte, insbesondere Heißluftdämpfern, bei denen die aufzubereitenden Speisen mittels Dampf und Heißluft gegart werden, weisen in der Regel einen Dampferzeuger auf, der den für den Dämpfvorgang notwendigen Dampf liefert.Cooking appliances, in particular combi steamers, in which those to be prepared Food is cooked using steam and hot air, usually have a steam generator that the for the steaming process provides the necessary steam.
Damit für eine kontinuierliche Dampferzeugung immer genügend Wasser vorhanden ist und die Heizflächen des Dampferzeugers nicht trocken erhitzt werden, was zum Auslösen eines Sicherheitstemperaturbegrenzers oder zum vorzeitigen Verschleiß der Heizkörper führen würde, sind diese Dampferzeuger mit Wasserfüllstandsüberwachungseinrichtungen versehen. In vorteilhafter Weise werden hierbei Füllstandselektroden eingesetzt, mit deren Hilfe über die elektrische Leitfähigkeit des Wassers der Füllstand im Dampferzeuger gemessen werden kann.So that's always enough for continuous steam generation There is water and the heating surfaces of the steam generator not be heated dry, which will trigger a Safety temperature limiter or for premature wear the radiator would run, these are steam generators provided with water level monitoring devices. Level electrodes are advantageously used here used with the help of electrical conductivity the water level in the steam generator can be measured can.
Beim Betrieb solcher Dampferzeuger bereitet hartes und somit mineralhaltiges Wasser Probleme, die nicht nur zu Beeinträchtigungen und kurzzeitigen Störungen, sondern auch zu einem vollständigen Ausfall des Dampferzeugers führen können. When operating such steam generators prepares hard and thus Mineral water problems that are not just impairments and short-term disturbances, but also too a complete failure of the steam generator.
Bei der Erwärmung von Wasser über 60°C fallen die gelösten Mineralien aus und können besonders bei Vorhandensein von Kalzium und Magnesium zu einem harten Kalkbelag führen. Diese Verkalkung führt zu einer Verminderung des Wärmeübergangs zwischen der Heizfläche und dem eingefüllten Wasser, was zu einer Überhitzung der Heizflächen führen kann. Weiterhin kann die Verkalkung im Dampferzeuger zu einer Verstopfung von Zu- und Abläufen führen, insbesondere durch von den Heizflächen sich ablösende Kalkteile.When water is heated above 60 ° C, the dissolved ones fall Minerals and can be particularly present in the presence of Calcium and magnesium lead to hard limescale. This calcification leads to a reduction in the heat transfer between the heating surface and the filled water, which can cause the heating surfaces to overheat. Furthermore, the calcification in the steam generator can lead to a Carry out clogging of inlets and outlets, in particular Limescale detaching from the heating surfaces.
Aus der EP 0 383 327 A1 ist ein Dampferzeuger für Gargeräte mit einer Entkalkungseinrichtung bekannt, bei welcher in einstellbaren Intervallen in Abhängigkeit von der Betriebsdauer und/oder der Temperatur der Heizeinrichtung automatisch eine Durchspülung des Dampferzeugers und damit eine Abführung von am Boden des Dampferzeugers sich ansammelnden Kalkteilen erfolgt. Hierdurch können aber nur die von den Wänden oder den Heizflächen abgefallenen Kalkteile entfernt werden. Die Spülung erfolgt dabei in unmittelbarer Nähe des Bodens des Dampferzeugers, wodurch diese Sedimentteile ausgetragen werden.EP 0 383 327 A1 describes a steam generator for cooking devices known with a descaling device, in which in adjustable Intervals depending on the operating time and / or the temperature of the heating device automatically Flushing the steam generator and thus a discharge from accumulating on the bottom of the steam generator Lime dividing takes place. As a result, only those of the Removed limescale from walls or heating surfaces become. The flushing takes place in the immediate vicinity of the Bottom of the steam generator, whereby these sediment parts are discharged become.
Bei höherer Konzentration an Phosphaten, Kalzium, Magnesium, Karbonat, Sulfat und Natrium im Wasser des Dampferzeugers steigt nicht nur die Gefahr der Verkalkung, sondern auch die Neigung des Wassers beim Sieden aufzuschäumen. Eine Konzentrationserhöhung dieser Stoffe entsteht bei mineralhaltigem Wasser im Dampferzeuger zwangsläufig durch die Nachspeisung von immer wieder neuem, frischem Wasser zum Ausgleich des bereits verdampften Wassers. Das Wasser wird sichtbar trüb und beginnt ab einer bestimmten Konzentration der oben genannte Stoffe beim Sieden zu schäumen.With a higher concentration of phosphates, calcium, magnesium, Carbonate, sulfate and sodium in the water of the steam generator not only increases the risk of calcification, but also also foaming the tendency of the water to boil. An increase in the concentration of these substances occurs with mineral-containing substances Water in the steam generator inevitably through the Replenishment of fresh water over and over again Compensation for the already evaporated water. The water will visibly cloudy and begins at a certain concentration to foam the above substances during boiling.
Die Folge erhöhter Mineralstoffkonzentrationen im Wasser ist nicht nur die Verkalkung des Dampferzeugers, sondern auch ein Versagen der Füllstandsüberwachung im Dampferzeuger auf der Basis der elektrischen Leitfähigkeit wegen der eintretenden Aufschäumung, da Schaum ebenfalls elektrisch leitfähig ist. Die Füllstandselektroden können dann nicht mehr den tatsächlichen Wasserstand messen, da eine Unterscheidung zwischen Schaum und Wasser durch diese Elektroden nicht möglich ist. Die Folge hiervon ist, daß die Füllstandsüberwachungselektroden einen Wasserstand anzeigen, der tatsächlich nicht vorhanden ist, wodurch der Wasserstand bis unter die Heizflächen absinkt, was zu einer Überhitzung der Heizflächen führt. In diesem Zustand hört dann bei Fehlen von Wasser der Siedevorgang auf, wodurch der Schaum wieder zusammenfällt, und dann die Meldung über fehlendes Wasser häufig zu spät kommt. Ein solcher Vorgang führt demgemäß nicht nur zur Schädigung des Dampferzeugers und insbesondere seiner Heizflächen, sondern auch zu einer Unterbrechung des Garvorganges wegen fehlender Dampfproduktion.The consequence of increased mineral concentrations in the water is not just the calcification of the steam generator, but also a failure of the level monitoring in the steam generator based on the electrical conductivity due to the entering Foaming because foam is also electrically conductive is. The level electrodes can then no longer measure actual water level as a distinction not between foam and water through these electrodes is possible. The consequence of this is that the level monitoring electrodes display a water level that is actually is absent, causing the water level to drop below Heating surfaces sink, causing the heating surfaces to overheat leads. In this state, the water stops when there is no water Boiling process, causing the foam to collapse again, and then the missing water report is often too late comes. Accordingly, such a process does not only lead to Damage to the steam generator and in particular its heating surfaces, but also to interrupt the cooking process due to lack of steam production.
Mit der weiter oben beschriebenen bekannten Einrichtung bei einem Dampferzeuger lassen sich die Probleme, die mit der Schaumbildung aufgrund eines hohen Härtegrades des Wassers zusammenhängen, nicht lösen. Diese bekannte Vorrichtung berücksichtigt somit nicht die Härte des Wassers oder den Verkalkungsgrad des Dampferzeugers, sondern entfernt nur in einstellbaren Intervallen die am Boden des Dampferzeugers sich ansammelnden, losen Kalkteile.With the known device described above A steam generator can solve the problems associated with the Foaming due to the high degree of hardness of the water related, not solve. This known device thus does not take into account the hardness of the water or the degree of calcification of the steam generator, but removed only at adjustable intervals on the bottom of the steam generator accumulating, loose limescale.
Aufgabe der Erfindung ist es, ein Verfahren aufzuzeigen, mit dessen Hilfe die sich bei hartem Wasser ergebenden Nachteile, die insbesondere mit der Schaumbildung zusammenhängen, weitgehend zu vermeiden, das heißt, der Gefahr einer Verkalkung und einer Fehlanzeige durch Schaumbildung in Verbindung mit einer Überhitzung der Heizflächen entgegenzuwirken. The object of the invention is to demonstrate a method with whose help has the disadvantages of hard water, which are particularly related to foam formation, largely avoided, that is, the risk of calcification and a failure to report due to foaming counteracting overheating of the heating surfaces.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß während des Betriebes des Dampferzeugers zumindest ein wesentlicher Betriebsparameter desselben gemessen, der gemessene. Ist-Wert mit einem Soll-Wert verglichen und das Ergebnis des Vergleiches als Regelgröße oder Steuergröße für die Behebung der Ursache der Abweichung oder für die Abschaltung des Dampferzeugers verwendet wird und daß der jeweilige Soll-Wert bei einem unbeeinträchtigten Dampferzeuger erfaßt und abgespeichert wird. Der jeweilige Soll-Wert für jeden Betriebsparameter wird also bei einem neuen Dampferzeuger oder bei einem sorgfältig entkalkten Dampferzeuger in der ersten noch nicht beeinträchtigten Betriebsphase festgestellt und dient somit als Vergleichswert bei späteren Messungen während des Betriebes eines Dampferzeugers. Bei der Feststellung des Soll-Wertes werden bei einem unbeeinträchtigten Dampferzeuger, d.h. bei einem neuen Dampferzeuger oder bei einem sorgfältig entkalkten Dampferzeuger, mehrere Messungen durchgeführt, um einen Mittelwert zu erhalten, da bestimmte Zufälligkeiten, wie Stromschwankungen, auszuschließen sind.This object is achieved in that during the operation of the steam generator at least a substantial one Operating parameters of the same measured, the measured. Actual value compared with a target value and the result of the Comparison as a controlled variable or control variable for the remedy the cause of the deviation or for switching off the Steam generator is used and that the respective target value detected in an unaffected steam generator and is saved. The respective target value for each operating parameter So with a new steam generator or with a carefully decalcified steam generator in the first undisturbed operating phase determined and serves thus as a comparison value for later measurements during the Operation of a steam generator. When determining the target value with an unaffected steam generator, i.e. with a new steam generator or with one carefully decalcified steam generator, several measurements carried out, to get an average because certain randomness, how current fluctuations can be excluded.
Die erhaltene Regelgröße oder Steuergröße wird vorzugsweise für die Durchführung eines Wasserwechslers oder eines Entkalkungsvorganges herangezogen.The control variable or control variable obtained is preferred for carrying out a water changer or a descaling process used.
Ein wesentlicher Parameter ist der Zeitabstand zwischen zwei aufeinanderfolgenden Frischwasserauffüllvorgängen bei Siedetemperatur des Wassers im Dampferzeuger in Abhängigkeit von einer vorgegebenen Heizleistung. In der Praxis wird man bei verschiedenen Heizleistungen die jeweiligen Zeitabstände bei einem noch unbeeinträchtigten Dampferzeuger messen und abspeichern und so die jeweiligen Soll-Werte für einen späteren Vergleich erhalten.An important parameter is the time interval between two successive fresh water filling operations at boiling temperature of the water in the steam generator depending from a given heating output. In practice you will the respective time intervals for different heating outputs with a steam generator that is not yet affected and save and so the respective target values for a later Get comparison.
Weitere wesentliche Betriebsparameter sind die Siedetemperatur des Wassers im Dampferzeuger, die von der Höhe über dem Meeresspiegel abhängt, die Fülldauer zwischen den von den Füllstandsüberwachungseinrichtungen festgelegten Niedrig- und Hochwasserständen des Dampferzeugers, die Fülldauer bis zum Höchststand nach vollständiger Entleerung des Dampferzeugers und die Temperaturänderungsgeschwindigkeit des Wassers im Dampferzeuger bei vorgegebener Heizleistung, das heißt bei jeweils verschiedenen Heizleistungen. Diese Aufzählung wesentlicher Betriebsparameter ist nicht abschließend, sondern umfaßt nur diejenigen, die bevorzugt bei der Durchführung des Verfahrens nach der Erfindung berücksichtigt werden. Diese bei der ersten Inbetriebnahme eines Dampferzeugers gemessenen und gespeicherten Soll-Werte werden bei der späteren Überwachung mit den dann gemessenen Ist-Werten verglichen. Das Ergebnis dieses Vergleichs stellt eine Regelgröße oder eine Steuergröße dar, die dann zu den nachfolgend beschriebenen Eingriffen in den Betriebsablauf eines Dampferzeugers führen.The boiling temperature is another important operating parameter of water in the steam generator, from height above depends on the sea level, the filling time between those of the level monitoring devices specified low and flood levels of the steam generator, the filling time up to the maximum after complete emptying of the Steam generator and the rate of temperature change the water in the steam generator for a given heating output, that means with different heating outputs. This list essential operating parameter is not conclusive, but only includes those who prefer the Implementation of the method according to the invention considered become. This when you start up a Steam generator measured and stored target values are later measured with the then measured Actual values compared. The result of this comparison represents a controlled variable or a control variable, which then the interventions in the operating procedure described below of a steam generator.
Wenn bei Überschreiten des Zeitabstands-Soll-Wertes für das Frischwasserauffüllen bei Siedetemperatur eine kleine Menge kalten Frischwassers in den Dampferzeuger gespritzt oder gesprüht wird, so läßt sich hierdurch ein möglicherweise gebildeter Schaum zum Zusammenfallen bringen. Liegt eine solche Schaumbildung vor und wird etwas kaltes Wasser eingesprüht, so ist nach dem Zusammenfallen des Schaumes die Füllstandsregelung des Dampferzeugers wieder in der Lage, einen eventuell vorhandenen Wassermangel zu erkennen, wodurch das fehlende Wasser nachgefüllt und eine Überhitzung der Heizflächen vermieden werden kann.If, when the time interval target value for the Fill up fresh water at boiling temperature a small amount cold fresh water sprayed or sprayed into the steam generator becomes a possibly formed one Make foam collapse. There is one Foam formation and some cold water is sprayed in, this is the level control after the foam collapses the steam generator will be able to get one if there is a lack of water, replenished the missing water and overheated the Heating surfaces can be avoided.
Die Sicherheit beim Betrieb des Dampferzeugers wird auch bei einfacher Ausgestaltung dadurch erhöht, dass ein konstanter Zeitabschnitt und eine Wassermenge, die geringer ist als die verdampfte Wassermenge während dieses Zeitabschnittes, für das Einspritzen oder Einsprühen von Wasser in den Dampferzeuger festgelegt wird. Hierdurch wird eine Schaumbildung und gleichzeitig auch ein Überfüllen des Dampferzeugers vermieden.The safety when operating the steam generator is also at simple embodiment increased by the fact that a constant Period and an amount of water less than that amount of water evaporated during this period, for injecting or spraying water into the steam generator is set. This will cause foaming and at the same time avoid overfilling the steam generator.
Stellt die Füllstandsmeßeinrichtung nach dem kurzen Einsprühen von Frischwasser keinen Mangel fest, so wird in weiterer Ausgestaltung der Erfindung bei der Feststellung einer ausreichenden Wasserfüllhöhe nach dem Einsprühen von Frischwasser in den Dampferzeuger wegen Überschreitens des Zeitabstands-Soll-Wertes mindestens eine Spülung umfassend eine Entleerung und eine Füllung des Dampferzeugers mit Frischwasser durchgeführt. Hierdurch kann festgestellt werden, ob für das Überschreiten des Zeitabstands-Soll-Wertes ein, durch Reinigungsmittel hervorgerufener Schaum, welcher sich nicht durch Einsprühen von Frischwasser auflösen lässt, die Ursache war. Die Durchführung von mindestens einer Spülung führt dann dazu, das Reinigungsmittel und damit die Ursache für die Schaumbildung zu beseitigen. Liegt dann immer noch eine Abweichung zum Zeitabstands-Soll-Wert vor, so ist die Füllstandsmeßeinrichtung zu überprüfen.Restores the level measuring device after the short spraying no shortage of fresh water is found, so in another Embodiment of the invention when determining a sufficient water level after spraying Fresh water in the steam generator due to exceeding the Time interval target value comprising at least one rinse emptying and filling the steam generator with Fresh water carried out. This can be used to determine whether for exceeding the time interval target value a foam caused by detergent, which cannot be dissolved by spraying fresh water, the cause was. Performing at least one rinse then leads to the detergent and thus the cause to eliminate foaming. Then always lies there is still a deviation from the time interval target value check the level measuring device.
Wenn eine solche Störung nicht vorliegt, wird nach Feststellen der richtigen Funktionsweise der Füllstandsüberwachungseinrichtung nach dem Einsprühen von Frischwasser mindestens eine Spülung, umfassend eine Entleerung und eine Füllung des Dampferzeugers mit Frischwasser nach Ablauf des laufenden Garprogrammes durchgeführt. Es wird also, wenn eine durch Reinigungsschaum entstandene Störung nicht vorliegt, nach dem Einsprühen von Frischwasser ein Wassermangel festgestellt, zunächst der Dampferzeuger mit Wasser aufgefüllt und angenommen, dass die Ursache für das Überschreiten des Zeitabstands-Soll-Wertes eine hohe Konzentration an Mineralien und damit aufschäumendes Wasser war. In diesem Falle wird deshalb erst nach Ablauf des Garprogrammes und Unterschreiten einer bestimmten Temperatur im Dampferzeuger eine Spülung durchgeführt, um den laufenden Garvorgang nicht zu stören, weil diese festgestellte Störung durch das Nachfüllen von Wasser behoben und damit die Gefahr einer Überhitzung der Heizflächen beseitigt wurde. Diese Maßnahme wird durchgeführt, um einer zunehmenden Erhöhung der Konzentration an Mineralien im Wasser des Dampferzeugers vorzubeugen, die Ursache für die Schaumbildung und das dadurch ausgelöste Einsprühen von einer kleinen Menge Frischwasser in den Dampferzeuger war.If such a malfunction does not exist, it will be determined the correct functioning of the level monitoring device after spraying in fresh water at least a rinse comprising emptying and filling of the steam generator with fresh water after the running one Cooking program carried out. So it will be when one there is no disturbance caused by cleaning foam, lack of water after spraying fresh water found, the steam generator first filled with water and assumed that the reason for exceeding the Time interval target value a high concentration of minerals and with it was foaming water. In this case is therefore only after the end of the cooking program and below a certain temperature in the steam generator Rinsing carried out so as not to stop the current cooking process interfere because this detected malfunction due to refilling fixed by water and thus the risk of overheating of the heating surfaces has been removed. This measure is carried out to an increasing increase in concentration to prevent minerals in the water of the steam generator that Cause of the foam formation and the resultant Spray a small amount of fresh water into the Was steam generator.
Um den eingangs erläuterten Folgen, die sich aus einer hohen Wasserhärte und der Erhöhung der Konzentration an Mineralien in dem Wasser des Dampferzeugers ergeben, noch weiter vorzubeugen, ist in Weiterbildung der Erfindung vorgesehen, daß die Anzahl der Einsprühvorgänge gezählt und abgespeichert wird und daß in Abhängigkeit von dieser Anzahl je vorgebener Zeiteinheit die Notwendigkeit einer Entkalkung angezeigt und bei Nichtdurchführung die Heizung für den Dampferzeuger abgeschaltet wird.To the consequences explained above, which result from a high Water hardness and increasing the concentration of minerals in the water of the steam generator, still further to prevent, is provided in a development of the invention, that the number of spraying operations is counted and saved is and that depending on this number depending Unit of time indicates the need for descaling and the heater for the steam generator if not carried out is switched off.
Es ist aber auch möglich, daß die Anzahl der Einsprühvorgänge gezählt und abgespeichert wird und daß in Abhängigkeit von dieser Anzahl je vorgebener Zeiteinheit eine Entkalkung des Dampferzeugers automatisch durchgeführt wird. Hier kann insbesondere eine chemische Entkalkung durchgeführt werden, die alle Kalkablagerungen entfernt und nicht nur zu einer Entfernung der Kalksedimente am Boden des Dampferzeugers führt.But it is also possible that the number of spraying operations is counted and saved and that depending a descaling from this number for each specified time unit of the steam generator is carried out automatically. Here can chemical descaling in particular, which removes all limescale and not just one Removal of lime sediment from the bottom of the steam generator leads.
Claims (12)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10028595A DE10028595B4 (en) | 2000-06-09 | 2000-06-09 | Method for monitoring the operation of a steam generator for cooking appliances |
| DE10028595 | 2000-06-09 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1162402A2 true EP1162402A2 (en) | 2001-12-12 |
| EP1162402A3 EP1162402A3 (en) | 2003-08-13 |
| EP1162402B1 EP1162402B1 (en) | 2007-06-06 |
Family
ID=7645247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01113934A Expired - Lifetime EP1162402B1 (en) | 2000-06-09 | 2001-06-07 | Method for monitoring the operation of a steam generator for cooking apparatus |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1162402B1 (en) |
| AT (1) | ATE364156T1 (en) |
| DE (2) | DE10028595B4 (en) |
| ES (1) | ES2178617T3 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006016757A1 (en) * | 2006-04-10 | 2007-10-18 | Rational Ag | Process to clean liquid food processing assembly at irregular intervals and using varying concentrations of cleaning agents |
| US8025740B2 (en) | 2006-01-30 | 2011-09-27 | Rational Ag | Process for conducting cleaning operations in a fluid-receiving device of a foodstuff-processing apparatus, and fluid-receiving device and foodstuff-processing apparatus therefor |
| CN105266576A (en) * | 2015-11-23 | 2016-01-27 | 珠海格力电器股份有限公司 | Method and apparatus for determining boiling point temperature, and electric pressure cooker |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10259829B4 (en) * | 2002-12-19 | 2005-10-06 | Convotherm Elektrogeräte GmbH | Method for decalcifying steam generators for cooking appliances |
| DE102006004340A1 (en) * | 2006-01-30 | 2007-08-09 | Rational Ag | Process to clean liquid food processing assembly at irregular intervals and using varying concentrations of cleaning agents |
| DE202008010308U1 (en) | 2008-07-31 | 2008-11-20 | Lechmetall Landsberg Gmbh Edelstahlerzeugnisse | vent pipe |
| DE102008056324B4 (en) * | 2008-11-07 | 2016-07-07 | Rational Ag | Method for refilling a steam generator with water, steam generator therefor and cooking appliance therewith |
| DE102016100195A1 (en) | 2016-01-06 | 2017-07-06 | Miele & Cie. Kg | Method for determining the hardness of water in water heating appliances, in particular in water-conducting household electrical appliances |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0383327A1 (en) | 1989-02-17 | 1990-08-22 | LechMetall Landsberg GmbH Edelstahlerzeugnisse | Cooking steam generator with a descaling device |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1652399A1 (en) * | 1967-11-15 | 1971-01-28 | Hans Maile Fabrik Fuer Gasbren | Device for heating and sticking material webs on substrates |
| GB1418994A (en) * | 1973-02-16 | 1975-12-24 | Easton Williams R H | Electrode boiler with automatic control |
| CH563000A5 (en) * | 1973-03-09 | 1975-06-13 | Plascon Ag | |
| DE2652399A1 (en) * | 1976-11-17 | 1978-05-18 | Bosch Siemens Hausgeraete | Electric coffee maker with furring up indicator - has water level measurer and timer providing indication even with small amounts of beverage |
| US4792660A (en) * | 1986-03-21 | 1988-12-20 | Carnes Company, Inc. | Humidifier controller having automatic over-current correcting means |
| FR2625794B1 (en) * | 1988-01-08 | 1990-05-04 | Bourgeois Ste Coop Production | WATER VAPOR GENERATOR FOR COOKING APPLIANCE |
| DE4218440A1 (en) * | 1992-06-04 | 1993-12-09 | Melitta Haushaltsprodukte | Coffee or tea machine with a descaling indicator |
| DE9214577U1 (en) * | 1992-10-28 | 1993-12-16 | Mayer Herbert | Steam generator |
| DE19912444C2 (en) * | 1999-03-19 | 2001-11-29 | Rational Ag | Steam generator of a cooking device with a device for electronic calcification monitoring |
-
2000
- 2000-06-09 DE DE10028595A patent/DE10028595B4/en not_active Expired - Fee Related
-
2001
- 2001-06-07 DE DE50112586T patent/DE50112586D1/en not_active Expired - Lifetime
- 2001-06-07 ES ES01113934T patent/ES2178617T3/en not_active Expired - Lifetime
- 2001-06-07 AT AT01113934T patent/ATE364156T1/en not_active IP Right Cessation
- 2001-06-07 EP EP01113934A patent/EP1162402B1/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0383327A1 (en) | 1989-02-17 | 1990-08-22 | LechMetall Landsberg GmbH Edelstahlerzeugnisse | Cooking steam generator with a descaling device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8025740B2 (en) | 2006-01-30 | 2011-09-27 | Rational Ag | Process for conducting cleaning operations in a fluid-receiving device of a foodstuff-processing apparatus, and fluid-receiving device and foodstuff-processing apparatus therefor |
| DE102006016757A1 (en) * | 2006-04-10 | 2007-10-18 | Rational Ag | Process to clean liquid food processing assembly at irregular intervals and using varying concentrations of cleaning agents |
| DE102006016757B4 (en) * | 2006-04-10 | 2016-06-23 | Rational Ag | A method of determining a characteristic size of a fluid, fluid receiving device and cooking device |
| CN105266576A (en) * | 2015-11-23 | 2016-01-27 | 珠海格力电器股份有限公司 | Method and apparatus for determining boiling point temperature, and electric pressure cooker |
| CN105266576B (en) * | 2015-11-23 | 2017-05-10 | 珠海格力电器股份有限公司 | Method and apparatus for determining boiling point temperature, and electric pressure cooker |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1162402A3 (en) | 2003-08-13 |
| ATE364156T1 (en) | 2007-06-15 |
| DE50112586D1 (en) | 2007-07-19 |
| ES2178617T1 (en) | 2003-01-01 |
| DE10028595B4 (en) | 2004-05-13 |
| EP1162402B1 (en) | 2007-06-06 |
| DE10028595A1 (en) | 2002-01-03 |
| ES2178617T3 (en) | 2007-12-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1430823B1 (en) | Method and apparatus for deliming steam generators for cooking appliances | |
| EP1953458B1 (en) | Method for cleaning a cooking device | |
| DE102011006766B4 (en) | Steam generator and method for controlling the water supply of the steam generator | |
| EP1162905B1 (en) | Device for electronically monitoring scaling | |
| DE102006010460A1 (en) | Method for cleaning a cooking appliance and cooking appliance | |
| EP2842474B1 (en) | Water-bearing household device with a heating device | |
| WO2009027343A1 (en) | Water-conducting household appliance comprising a water softening device | |
| DE102007048567A1 (en) | Process for cleaning a system consisting of a tank and a water heater, and system | |
| DE10028595B4 (en) | Method for monitoring the operation of a steam generator for cooking appliances | |
| CH691948A5 (en) | Boiler for steam generator in steam cooking unit, comprises sensors for measuring water and heating element temperatures, and lime scale detection unit utilizing signals from these sensors | |
| DE19841568A1 (en) | Automatic regeneration of washing up machine water softener | |
| WO2007085247A2 (en) | Process for conducting cleaning operations in a fluid-receiving device of a foodstuff-processing apparatus, and fluid-receiving device and foodstuff-processing apparatus therefor | |
| EP0258358B1 (en) | Steam generator | |
| DE102007052837A1 (en) | Process for treating laundry in a household washing machine with a foam-forming liquor | |
| EP2350529A2 (en) | Household appliance having a fillable steam boiler, and steam boiler for a household appliance | |
| DE102016124405B3 (en) | Method for determining a calcification of a cooking appliance | |
| DE102006016757B4 (en) | A method of determining a characteristic size of a fluid, fluid receiving device and cooking device | |
| EP3278031A1 (en) | Carrying out a cleaning procedure for a cooking device | |
| EP3076086B1 (en) | Domestic cooking appliance and method for operating same | |
| EP0483622A1 (en) | Process and system for operating a steam generator for cooking apparatus | |
| DE10053220A1 (en) | Method and device for determining deposits of constituents of a liquid on surfaces, in particular in liquid-carrying machines | |
| WO2014095975A2 (en) | Steam generator with water level detection device | |
| DE102004012824A1 (en) | Filling/charge monitoring process for a cooking device comprises analyzing a characteristic parameter for a ventilation device that changes on the basis of the force exerted by a fluid incident on a fan using a filling/charge | |
| DE102019211361B3 (en) | Method for operating a device network | |
| DE102017101078A1 (en) | Recognition device for detecting a filling level for a steam generating device of a steam ironing device and method for operating a recognition device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
| AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
| EL | Fr: translation of claims filed | ||
| GBC | Gb: translation of claims filed (gb section 78(7)/1977) | ||
| TCNL | Nl: translation of patent claims filed | ||
| PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
| AK | Designated contracting states |
Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
| AX | Request for extension of the european patent |
Extension state: AL LT LV MK RO SI |
|
| 17P | Request for examination filed |
Effective date: 20030730 |
|
| AKX | Designation fees paid |
Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
| 17Q | First examination report despatched |
Effective date: 20050531 |
|
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: RIEFENSTEIN, LUTZ Inventor name: SCHWARZBAECKER, WERNER |
|
| GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20070606 |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
| REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: LANGUAGE OF EP DOCUMENT: GERMAN |
|
| REF | Corresponds to: |
Ref document number: 50112586 Country of ref document: DE Date of ref document: 20070719 Kind code of ref document: P |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20070724 |
|
| REG | Reference to a national code |
Ref country code: SE Ref legal event code: TRGR |
|
| ET | Fr: translation filed | ||
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2178617 Country of ref document: ES Kind code of ref document: T3 |
|
| BERE | Be: lapsed |
Owner name: CONVOTHERM-ELEKTROGERATE G.M.B.H. Effective date: 20070630 |
|
| REG | Reference to a national code |
Ref country code: IE Ref legal event code: FD4D |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070630 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20071106 Ref country code: IE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20070606 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070630 |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20070606 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20070907 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070630 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070630 |
|
| 26N | No opposition filed |
Effective date: 20080307 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070607 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20080618 Year of fee payment: 8 Ref country code: SE Payment date: 20080612 Year of fee payment: 8 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20080620 Year of fee payment: 8 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20070606 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070607 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20070606 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20090607 |
|
| NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 20100101 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090607 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100101 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090608 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20120705 Year of fee payment: 12 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20120626 Year of fee payment: 12 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20140228 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20130701 |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20140707 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20130608 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R082 Ref document number: 50112586 Country of ref document: DE Representative=s name: HOEFER & PARTNER PATENTANWAELTE MBB, DE |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20180621 Year of fee payment: 18 Ref country code: DE Payment date: 20180627 Year of fee payment: 18 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 50112586 Country of ref document: DE |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20190607 Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200101 |