EP1565689B1 - Method for operating a cooking hob, and cooking hob - Google Patents
Method for operating a cooking hob, and cooking hob Download PDFInfo
- Publication number
- EP1565689B1 EP1565689B1 EP03775223A EP03775223A EP1565689B1 EP 1565689 B1 EP1565689 B1 EP 1565689B1 EP 03775223 A EP03775223 A EP 03775223A EP 03775223 A EP03775223 A EP 03775223A EP 1565689 B1 EP1565689 B1 EP 1565689B1
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- European Patent Office
- Prior art keywords
- cooking
- temperature
- component
- heating power
- gas
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- 238000010411 cooking Methods 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims description 24
- 238000010586 diagram Methods 0.000 description 13
- 238000001816 cooling Methods 0.000 description 8
- 238000013021 overheating Methods 0.000 description 4
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012544 monitoring process Methods 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
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/12—Arrangement or mounting of control or safety devices
- F24C3/126—Arrangement or mounting of control or safety devices on ranges
Definitions
- the present invention relates to a hob, in particular a gas hob, and a method for operating the hob with at least two cooking zones and with at least one electronic control component, of which hotplates at least a second cooking point is further spaced from the electronic component as a first cooking point.
- a method for operating a hob in which the gas burners are switched off to protect against overheating of electronic components of the gas hob when the temperature of the electronic component exceeds a temperature limit.
- the temperature limit corresponds to the maximum permissible temperature, exceeding which there is a risk of overheating of the electronic components.
- the object of the present invention is to provide a hob, in particular gas hob, and a method for operating a hob, in order to improve its usability.
- the object of the invention is achieved by a method having the features of claim 1.
- the electronic component closest to the first cooking point is assigned a temperature limit independent of the second cooking point in the process. If the temperature of the electronic component exceeds this temperature limit, only the nearest first hotplate to prevent overheating of the electronic component is put out of service or reduced its heating power output. By contrast, the second hotplate remains usable for an operator.
- the second cooking point ie the second gas burner
- a primary air flow to the second gas burner promotes effective cooling of the electronic component.
- the primary air flow results when Convection air from the environment is sucked into the leading to the gas burner gas supply line.
- the temperature limit may be on the order of about 20 K below a maximum allowable temperature. This must not be exceeded if the thermal load of the electronic component is high. The first hotplate is therefore turned off before reaching the maximum temperature or reduced in its heating power. In this way, it is achieved that despite an operation of the remotely located cooking point, the component temperature does not rise to the maximum temperature.
- the electronic control device of the gas hob can be assigned a timer. The timer prevents until the expiration of a predetermined cooling time interval, the provision of the first gas burner.
- the length of the cooling time interval can be predetermined as follows: First, a time course of the component temperature immediately after entering the cooling time interval is detected. Based on the detected time history, the length of the time interval is predetermined.
- the pitch angle of the time characteristic of the component temperature can be permanently monitored: If the component temperature falls in a pitch angle that is greater than a predetermined pitch angle stored in the control unit, the provision of the first gas burner takes place.
- the resetting of the first gas burner takes place as soon as the component temperature falls below the temperature limit again.
- the first gas burner can be reset when the component temperature falls below a lower temperature limit below the temperature limit. This is advantageous in a nearly continuous measurement of the component temperature. In a continuous measurement, namely, the measured temperature values within a tolerance band can fluctuate around an average component temperature. The lower temperature limit lies around this tolerance band below the actual temperature limit. A constant switching on / off of the gas burner is thus prevented when the component temperature is in the range of the temperature limit.
- the power level of a hotplate can be stored by control electronics.
- the stored power level of the first gas burner automatically resets itself by means of the control electronics.
- the second gas burner can also be switched inoperative or reduced in its heating power output. This measure can be realized in circuit technology simple manner, if the component temperature is still above the temperature limit after a certain period of time.
- the second gas burner can also be assigned its own second temperature limit. This is above the first temperature limit. If the component temperature exceeds the second temperature limit, the second gas burner is additionally deactivated or its heating output is reduced. This variant is preferred for safety reasons, since the second gas burner is only actuated when the associated temperature limit is actually exceeded.
- the serviceability of the gas cooker field can be further increased if each of the gas burners of the gas hob is assigned its own temperature limit.
- the values of the associated temperature limits increase as the distance between the gas burners and the electronic component increases. If the component temperature exceeds one of the temperature limits, the associated gas burner is put out of operation or its Schuzzisabgabe reduced. When the component temperature rises, therefore, after the first temperature limit has been exceeded, first the first gas burner is switched off or its heating power is reduced. Subsequently, if appropriate, the more distant gas burners are switched off in turn or their heating powers are reduced.
- the temperature limit of the most remote to the electronic component gas burner can be designed in the range of the maximum allowable temperature for the electronic component.
- FIG. 1 is shown in a cutout of a worktop used gas hob.
- the gas hob has four gas burners 1, 2, 3, 4.
- the gas burners can be actuated by provided in a front panel 6 control knob 7.
- carrier grids 8 are arranged above the gas burner, on which Gargut electnisse not shown off.
- the gas hob on a bottom tray 9 with raised side walls 10.
- On the side walls 10 of the bottom tray 9, a cover plate 11 is attached.
- the cover plate 11 is seated with its outer periphery on the worktop 1.
- the bottom tray 9 defines together with the cover plate 11 a trough interior 12.
- electronic components such arranged about an ignition device 13 or a control device 14 for the gas burner.
- FIG. 3 In the block diagram of FIG. 3 is an example of the functional connection between the components 13, 14 shown with the gas burner 1.
- the further gas burners 2 to 4 are in identical manner with the components 13, 14 in connection. Consequently, the gas burner 1 is supplied with gas via a gas supply line 21.
- an electromagnetic safety valve 22 is arranged, which is opened or closed by the electronic control device 14.
- the gas volume flow in the gas supply line 21 required for a desired burner heating power can be set by means of a gas tap 23.
- the gas cock 23 is to be operated with the control knob 13.
- the control knob 13 is also coupled to a signal generator 25, which is via lines 27 to the electronic control device 14 in a signal connection.
- the gas burner 1 is assigned a thermocouple 29, which detects the presence of a flame on the gas burner 1.
- the electronic control device 14 is in addition via a line 28 in signal communication with the ignition device 13. This controls an ignition electrode 18 to ignite a flame on the gas burner 1.
- thermocouple 29 is heated by the flame of the gas burner 1. The thermal energy thus generated on the thermocouple 29 takes over the function of the external current and stops at the Set the safety valve 22 open. After a flame extinction on the gas burner 1, the thermocouple cools down, whereby no more thermal power is generated. As a result, the electronic control device 14 closes the safety valve 22 and the gas supply line 21 to the gas burner 1 is blocked.
- the electronic control device 14 is connected to a temperature sensor 33.
- the temperature sensor 33 detects a temperature T K in the electronic components 13, 14.
- the sensed temperature T K is compared with data stored in the control device 14 limits temperature T 1, T 2, T 3, T. 4
- Each of the temperature limits T 1 , T 2 , T 3 , T 4 is according to the diagram of FIG. 4 one of the four gas burners 1, 2, 3, 4 assigned. From the diagram of FIG. 4 shows that the values of the stored temperature limits T 1 , T 2 , T 3 , T 4 increase with increasing distance of the gas burner to the electronic components 13, 14. Consequently, the gas burner 1 closest to the electronic components 13, 14 is assigned a lower temperature limit T 1 of 90 ° C.
- the most widely spaced from the electronic components 13, 14 of gas burner 4 is associated with an upper temperature limit T 4 of 110 ° C.
- the upper temperature limit T 4 is approximately in a range that is reached at a maximum allowable heat load of the components 13, 14.
- a time characteristic of the temperature T K measured by the temperature sensor 33 of the electronic components 13, 14 is shown in the temperature diagram of FIG. 5 As a result, at the beginning of the burner operation after the time t 0, the component temperature T K initially rises steadily until the first temperature limit T 1 is exceeded. This is assigned to the first gas burner 1. In this case, the safety valve 22 in the gas supply line 21 to the first gas burner 1 is controlled and closed by the electronic control device 14. The first gas burner 1 is thus set from the time t 1 out of service, as from the operability diagram of FIG. 5 , below. By switching off the first gas burner 1, the component temperature T K increases less rapidly after time t 1 until the second temperature limit T 2 has been exceeded by time t 2 . This is associated with the second gas burner 2.
- the electronic control device 14 at time t 2 closes the safety valve 22 of the second gas burner 2.
- the gas burner 3, 4 therefore remain operational.
- the component temperature T K drops below the second temperature limit T 2 again.
- the electronic control device 14 therefore releases the safety valve 22 of the second gas burner 2 again at the time t 3 .
- the second gas burner 2 can therefore at a corresponding operation of the associated control knob 13 are put into operation again.
- the component temperature T K also falls below the first temperature limit T 1 .
- the electronic control device 14 therefore releases the safety valve 22 of the first gas burner 1 again from the time t 4 .
- FIGS. 6 and 7 Power adjustment of the gas burners 1, 2, 3, 4 is not via gas taps 23, but via gas control valve assemblies 35.
- the gas control valve assemblies 35 are connected between the electronic control device 14 and each of the four gas burners 1, 2, 3, 4.
- the gas control valve assemblies 35 are connected between the electronic control device 14 and each of the four gas burners 1, 2, 3, 4.
- This is arranged in the gas supply line 21 and has four parallel partial gas lines through which flows a partial gas flow in each case.
- an electromagnetic control valve 37 is arranged with a downstream throttle 39. Their throttle diameters can differ from each other. Downstream of the throttles 39, the partial gas lines are brought together again in the gas supply line 21.
- the controller 14 opens one or more of the control valves 37 in the parallel partial gas lines. The size of the gas flow from the gas control valve arrangement 35 to the gas burner 1 therefore depends on the number of opened control valves 37.
- FIG. 7 is a gas hob operation according to the second embodiment illustrated by a temperature and Schuetz elaboratesdiagramms.
- all four gas burners 1, 2, 3, 4 are in operation at different heating powers P 1 , P 2 , P 3 , P 4 at time t 0 .
- the component temperature T K increases steadily after the time t 0 .
- the component temperature T K exceeds the first temperature limit T 1 .
- the four control valves 37 of the first gas burner 1 are therefore closed from the time t 1 . 14 simultaneously stores the control means controls the positions of the control valves 37 of the gas burner 1 at time t. 1
- the component temperature T K exceeds the second temperature limit T 2 .
- the electronic control device 14 accordingly closes all the control valves 37 of the second gas burner 2 and at the same time stores their positions. At time t 3 , the component temperature T K again falls below the second temperature limit T 2 . The electronic control device 14 therefore controls the control valves 37 of the second gas burner 2 according to their stored positions. The second gas burner 2 is therefore operated from the time t 3 again with its heating power P 2 . In the same way, the first gas burner 1 is put into operation again at the time t 4 .
- FIG. 8 a temperature and Schutting according to the third embodiment is shown.
- the structure of the gas hob of the third embodiment is similar to the gas hob of the second embodiment.
- a cooling time interval t a , t b predetermined for the off gas burner For predetermining the length of the cooling-time interval t a , the curve of the component temperature T K is first detected in a time span a. The period of time a begins immediately after the component temperature T K has exceeded the temperature limit T 1 .
- the electronic control device 14 determines the length of the cooling time interval t a for the first gas burner 1 on the basis of the curve profile of the component temperature T K recorded in the period a. After the cooling time interval t a has elapsed, the first gas burner 1 is stored again with it Heating power P 1 operated. In the same way, the length of the time interval t b for the second gas burner 2 is determined after the component temperature T K has exceeded the second temperature limit T 2
- the gas burners switched inoperative can also be switched back to operation when the component temperature T K falls within a pitch angle ⁇ which is greater than a predetermined pitch angle.
- the predetermined pitch angle is stored in the controller 14.
- the detected pitch angle ⁇ is greater than the stored pitch angle.
- the controller 14 turns forward haste ready for use again the first gas burner 1, before the component temperature T K is again fallen below the temperature limit T uncritical. 1
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Combustion (AREA)
- Cookers (AREA)
- General Preparation And Processing Of Foods (AREA)
- Control Of High-Frequency Heating Circuits (AREA)
- Electric Stoves And Ranges (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft ein Kochfeld, insbesondere ein Gaskochfeld sowie ein Verfahren zum Betreiben des Kochfeldes mit zumindest zwei Kochstellen und mit zumindest einer elektronischen Steuerkomponente, von welchen Kochstellen zumindest eine zweite Kochstelle weiter von der elektronischen Komponente beabstandet ist als eine erste Kochstelle.The present invention relates to a hob, in particular a gas hob, and a method for operating the hob with at least two cooking zones and with at least one electronic control component, of which hotplates at least a second cooking point is further spaced from the electronic component as a first cooking point.
Es ist ein Verfahren zum Betreiben eines Kochfeldes bekannt, bei dem zum Schutz vor Überhitzung von elektronischen Komponenten des Gaskochfeldes die Gasbrenner abgeschaltet werden, wenn die Temperatur der elektronischen Komponente eine Temperaturgrenze überschreitet. Die Temperaturgrenze entspricht der maximal zulässigen Temperatur, bei deren Überschreitung die Gefahr einer Überhitzung der elektronischen Komponenten besteht.A method is known for operating a hob, in which the gas burners are switched off to protect against overheating of electronic components of the gas hob when the temperature of the electronic component exceeds a temperature limit. The temperature limit corresponds to the maximum permissible temperature, exceeding which there is a risk of overheating of the electronic components.
Entsprechende Verfahren zeigen die Dokumente
Die Aufgabe der vorliegenden Erfindung besteht darin, ein Kochfeld, insbesondere Gaskochfeld, sowie ein Verfahren zum Betreiben eines Kochfeldes bereitzustellen, um dessen Gebrauchsfähigkeit zu verbessern.The object of the present invention is to provide a hob, in particular gas hob, and a method for operating a hob, in order to improve its usability.
Die Aufgabe der Erfindung ist durch ein Verfahren mit den Merkmalen des Patentanspruches 1 gelöst. Gemäß dem kennzeichnenden Teil des Patentanspruches 1 wird in dem Verfahren die der elektronischen Komponente nächstgelegenen ersten Kochstelle unabhängig von der zweiten Kochstelle eine Temperaturgrenze zugeordnet. Wenn die Temperatur der elektronischen Komponente diese Temperaturgrenze überschreitet, wird lediglich die nächstgelegene erste Kochstelle zum Schutz vor Überhitzung der elektronischen Komponente außer Betrieb gesetzt bzw. seine Heizleistungsabgabe reduziert. Die zweite Kochstelle bleibt dagegen weiterhin nutzbar für eine Bedienperson.The object of the invention is achieved by a method having the features of
Erfindungsgemäß erweist es sich bei Gaskochfeldern besonders vorteilhaft, wenn die zweite Kochstelle, d.h. der zweite Gasbrenner, im Betrieb verbleibt. In diesem Fall unterstützt nämlich eine Primärluftströmung zum zweiten Gasbrenner eine effektive Abkühlung der elektronischen Komponente. Die Primärluftströmung ergibt sich, wenn Konvektionsluft aus der Umgebung in die zum Gasbrenner führende Gaszuleitung gesaugt wird.According to the invention, it is particularly advantageous in the case of gas cooking fields if the second cooking point, ie the second gas burner, remains in operation. Namely, in this case, a primary air flow to the second gas burner promotes effective cooling of the electronic component. The primary air flow results when Convection air from the environment is sucked into the leading to the gas burner gas supply line.
Die nachfolgenden, auf Gaskochfelder gerichteten Ausführungsbeispiele gelten analog auch generell für Elektro-Kochfelder mit entsprechenden Kochstellen: Gemäß einer besonderen Ausführungsform kann die Temperaturgrenze in einer Größenordnung von ca. 20 K unterhalb einer zulässigen Maximaltemperatur liegen. Diese darf bei einer Wärmebelastung der elektronischen Komponente nicht überschritten werden. Die erste Kochstelle wird daher schon vor Erreichen der Maximaltemperatur ausgeschaltet bzw. in seiner Heizleistung reduziert. Auf diese Weise wird erreicht, dass trotz eines Betriebs der weiter entfernt gelegenen Kochstelle die Komponenten-Temperatur nicht bis zur Maximaltemperatur ansteigt.The following, directed to gas hobs embodiments apply analogously also generally for electric cooktops with corresponding cooking zones: According to a particular embodiment, the temperature limit may be on the order of about 20 K below a maximum allowable temperature. This must not be exceeded if the thermal load of the electronic component is high. The first hotplate is therefore turned off before reaching the maximum temperature or reduced in its heating power. In this way, it is achieved that despite an operation of the remotely located cooking point, the component temperature does not rise to the maximum temperature.
Zur Steigerung der Gebrauchsfähigkeit des Gaskochfeldes ist es von Vorteil, wenn die Betriebsfähigkeit bzw. die Heizleistungsabgabe der ersten Kochstelle noch während des Kochfeld-Betriebes wiederhergestellt bzw. rückgestellt wird. D.h., dass noch während weitere Gasbrenner in Betrieb sind, die Rückstellung des ersten Gasbrenners erfolgt. In schaltungstechnisch besonders einfacher Weise kann daher der elektronischen Steuereinrichtung des Gaskochfeldes ein Zeitglied zugeordnet sein. Das Zeitglied verhindert bis zum Ablauf eines vorgegebenen Abkühl-Zeitintervalls die Rückstellung des ersten Gasbrenners.To increase the serviceability of the gas hob, it is advantageous if the operability or the heating power output of the first hob still restored or reset during the hob operation. In other words, while additional gas burners are in operation, the provision of the first gas burner takes place. In circuit technology particularly simple manner, therefore, the electronic control device of the gas hob can be assigned a timer. The timer prevents until the expiration of a predetermined cooling time interval, the provision of the first gas burner.
Die Länge des Abkühl-Zeitintervalls kann wie folgt vorherbestimmt werden: Zunächst wird ein Zeitverlauf der Komponenten-Temperatur unmittelbar nach Eintritt in das Abkühl-Zeitintervall erfasst. Auf der Grundlage des erfassten Zeitverlaufes wird die Länge des Zeitintervalls vorherbestimmt.The length of the cooling time interval can be predetermined as follows: First, a time course of the component temperature immediately after entering the cooling time interval is detected. Based on the detected time history, the length of the time interval is predetermined.
Alternativ und/oder zusätzlich kann auch der Steigungswinkel des Zeitverlaufes der Komponenten-Temperatur dauerhaft überwacht werden: Fällt die Komponenten-Temperatur in einem Steigungswinkel, der größer als ein in der Steuereinrichtung gespeicherter vorbestimmter Steigungswinkel ist, erfolgt die Rückstellung des ersten Gasbrenners.Alternatively and / or additionally, the pitch angle of the time characteristic of the component temperature can be permanently monitored: If the component temperature falls in a pitch angle that is greater than a predetermined pitch angle stored in the control unit, the provision of the first gas burner takes place.
Sicherheitstechnisch besonders vorteilhaft ist es, wenn die Rückstellung des ersten Gasbrenners erfolgt, sobald die Komponenten-Temperatur die Temperaturgrenze wieder unterschreitet. Insbesondere kann der erste Gasbrenner zurückgestellt werden, wenn die Komponenten-Temperatur eine unterhalb der Temperaturgrenze liegende Temperatur-Untergrenze unterschreitet. Dies ist bei einer nahezu kontinuierlichen Messung der Komponenten-Temperatur vorteilhaft. Bei einer kontinuierlichen Messung können nämlich die gemessenen Temperaturwerte innerhalb eines Toleranzbandes um eine mittlere Komponenten-Temperatur schwanken. Die Temperatur-Untergrenze liegt um dieses Toleranzband unterhalb der eigentlichen Temperaturgrenze. Ein ständiges Ein/Ausschalten des Gasbrenners ist somit verhindert, wenn sich die Komponenten-Temperatur im Bereich der Temperaturgrenze bewegt.In terms of safety, it is particularly advantageous if the resetting of the first gas burner takes place as soon as the component temperature falls below the temperature limit again. In particular, the first gas burner can be reset when the component temperature falls below a lower temperature limit below the temperature limit. This is advantageous in a nearly continuous measurement of the component temperature. In a continuous measurement, namely, the measured temperature values within a tolerance band can fluctuate around an average component temperature. The lower temperature limit lies around this tolerance band below the actual temperature limit. A constant switching on / off of the gas burner is thus prevented when the component temperature is in the range of the temperature limit.
Besonders bedienungsfreundlich ist es, wenn die Heizleistungsabgabe des ersten Gasbrenners vor dem Überschreiten der Temperaturgrenze der Heizleistungsabgabe nach dem Unterschreiten der Temperaturgrenze entspricht. Dies ist insbesondere bei sogenannten vollelektronischen Gaskochfeldern einfach bewerkstelligbar. Bei vollelektronischen Gaskochfeldem kann die Leistungsstufe einer Kochstelle von einer Steuerelektronik gespeichert werden. Bei einem erneuten Einschalten des ersten Gasbrenners stellt sich die gespeicherte Leistungsstufe des ersten Gasbrenners mittels der Steuerelektronik selbsttätig wieder ein.It is particularly easy to use if the heat output of the first gas burner before exceeding the temperature limit of the heating output after falling below the temperature limit. This is easy to accomplish in particular in so-called fully electronic gas hobs. In the case of fully electronic gas hobs, the power level of a hotplate can be stored by control electronics. When the first gas burner is switched on again, the stored power level of the first gas burner automatically resets itself by means of the control electronics.
Wenn nach einer erfolgten Reduzierung der Heizleistungsabgabe an der ersten Kochstelle die Komponenten-Temperaturkurve nicht sinkt, können weitere Maßnahmen zum Schutz vor Überhitzung der elektronischen Komponente ergriffen werden: Vorteilhaft ist es, zunächst die erste Kochstelle komplette ausgeschaltet wird.If, after a successful reduction of the heat output at the first hob, the component temperature curve does not decrease, further measures to protect against overheating of the electronic component can be taken: It is advantageous, first the first cooking is switched off completely.
Sinkt selbst nach einem Ausschalten des ersten Gasbrenners die Komponenten-Temperaturkurve nicht, kann zusätzlich der zweite Gasbrenner betriebsunfähig geschaltet bzw. in seiner Heizleistungsabgabe reduziert werden. Diese Maßnahme kann in schaltungstechnisch einfacher Weise realisiert werden, wenn die Komponenten-Temperatur nach einer bestimmten Zeitdauer noch immer oberhalb der Temperaturgrenze liegt.If the component temperature curve does not drop even after the first gas burner has been switched off, the second gas burner can also be switched inoperative or reduced in its heating power output. This measure can be realized in circuit technology simple manner, if the component temperature is still above the temperature limit after a certain period of time.
Analog zum ersten Gasbrenner kann auch dem zweiten Gasbrenner eine eigene zweite Temperaturgrenze zugeordnet werden. Diese liegt oberhalb der ersten Temperaturgrenze. Wenn die Komponenten-Temperatur die zweite Temperaturgrenze überschreitet, wird zusätzlich der zweite Gasbrenner außer Betrieb gesetzt bzw. seine Heizleistungsabgabe reduziert. Diese Variante ist sicherheitstechnisch bevorzugt, da der zweite Gasbrenner erst betätigt wird, wenn die zugeordnete Temperaturgrenze tatsächlich überschritten wird.Analogous to the first gas burner, the second gas burner can also be assigned its own second temperature limit. This is above the first temperature limit. If the component temperature exceeds the second temperature limit, the second gas burner is additionally deactivated or its heating output is reduced. This variant is preferred for safety reasons, since the second gas burner is only actuated when the associated temperature limit is actually exceeded.
Die Gebrauchstauglichkeit des Gaskochsfeldes lässt sich weiter erhöhen, wenn jedem der Gasbrenner des Gaskochfeldes jeweils eine eigene Temperaturgrenze zugeordnet wird. Die Werte der zugeordneten Temperaturgrenzen steigen mit zunehmendem Abstand der Gasbrenner zu der elektronischen Komponente an. Sofern die Komponenten-Temperatur eine der Temperaturgrenzen überschreitet, wird der zugeordnete Gasbrenner außer Betrieb gesetzt bzw. seine Heizleistungsabgabe reduziert. Bei steigender Komponenten-Temperatur werden daher nach Überschreiten der ersten Temperaturgrenze zunächst der erste Gasbrenner ausgeschaltet bzw. dessen Heizleistung reduziert. Anschließend werden gegebenenfalls auch die weiter entfernten Gasbrenner der Reihe nach ausgeschaltet bzw. deren Heizleistungen reduziert. Die Temperaturgrenze des zur elektronischen Komponente entferntesten Gasbrenners kann dabei im Bereich der maximal zulässigen Temperatur für die elektronische Komponente ausgelegt sein.The serviceability of the gas cooker field can be further increased if each of the gas burners of the gas hob is assigned its own temperature limit. The values of the associated temperature limits increase as the distance between the gas burners and the electronic component increases. If the component temperature exceeds one of the temperature limits, the associated gas burner is put out of operation or its Heizleistungsabgabe reduced. When the component temperature rises, therefore, after the first temperature limit has been exceeded, first the first gas burner is switched off or its heating power is reduced. Subsequently, if appropriate, the more distant gas burners are switched off in turn or their heating powers are reduced. The temperature limit of the most remote to the electronic component gas burner can be designed in the range of the maximum allowable temperature for the electronic component.
Nachfolgend sind vier Ausführungsbeispiele der Erfindung anhand der beigefügten Figuren beschrieben. Es zeigen:
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ein Gaskochfeld in einer Ansicht von oben;Figur 1 -
eine Seitenschnittansicht entlang der Linie I-I aus derFigur 2 ;Figur 1 -
ein Blockdiagramm des Gaskochfelds gemäß dem ersten Ausführungsbeispiel;Figur 3 -
ein in einer elektronischen Steuereinrichtung des Gaskochfeldes gespeichertes Diagramm;Figur 4 -
Figur 5 ein Temperatur und Betriebsfähigkeitsdiagramm gemäß dem ersten Ausführungsbeispiel; -
ein Blockdiagramm entsprechend derFigur 6 gemäß dem zweiten Ausführungsbeispiel;Figur 3 -
ein Temperatur und Heizleistungsdiagramm gemäß dem zweiten Ausführungsbeispiel;Figur 7 -
ein Temperatur- und Heizleistungsdiagramm , gemäß dem dritten Ausführungsbeispiel; undFigur 8 -
ein Temperaturdiagramm gemäß dem vierten Ausführungsbeispiel.Figur 9
-
FIG. 1 a gas hob in a view from above; -
FIG. 2 a side sectional view along the line II of theFIG. 1 ; -
FIG. 3 a block diagram of the gas hob according to the first embodiment; -
FIG. 4 a diagram stored in an electronic control device of the gas hob; -
FIG. 5 a temperature and operability diagram according to the first embodiment; -
FIG. 6 a block diagram according to theFIG. 3 according to the second embodiment; -
FIG. 7 a temperature and Heizleistungsdiagramm according to the second embodiment; -
FIG. 8 a temperature and Heizleistungsdiagramm, according to the third embodiment; and -
FIG. 9 a temperature diagram according to the fourth embodiment.
In der
In der hinteren Seitenwand 10 der Bodenwanne 9 sind Primärluftöffnungen 15 ausgebildet. Durch diese strömt eine Konvektionsluft in den Muldeninnenraum 12. Die Konvektionsluft dient der Primärluftversorgung für Luftansaugbereiche 16 von Gasdüsen 17 der Gasbrenner. Ein Strömungsweg der Konvektionsluft ist in der
In dem Blockdiagramm der
Zur Inbetriebnahme des Gasbrenners 1 wird eine Druck- und/oder Drehbewegung auf den Bedienknebel 13 ausgeübt. Dadurch werden vom Signalgeber 25 entsprechende Signale erzeugt und über die Leitungen 27 zur elektronischen Steuereinrichtung 14 geleitet. Die elektronische Steuereinrichtung 14 erfasst die Signale des Signalgebers 25 und steuert entsprechend die Zündeinrichtung 13 an. Deren Zündelektrode 18 entzündet daraufhin eine Flamme am Gasbrenner 1. Gleichzeitig beaufschlagt die elektronische Steuereinrichtung 14 das bis dahin geschlossene Sicherheitsventil 22 mit einem Fremdstrom. Durch den Fremdstrom wird das Sicherheitsventil 22 und daher die Gaszuleitung 3 zum Gasbrenner 1 geöffnet Nach erfolgter Gasentzündung am Gasbrenner 1 erwärmt sich das Thermoelement 29 durch die Flamme des Gasbrenners 1. Der somit am Thermoelement 29 erzeugte Thermostrom übernimmt die Funktion des Fremdstroms und hält an dessen Stelle das Sicherheitsventil 22 offen. Nach einer Flammenerlöschung am Gasbrenner 1 kühlt das Thermoelement ab, wodurch kein Thermostrom mehr erzeugt wird. Dies führt dazu, dass die elektronische Steuereinrichtung 14 das Sicherheitsventil 22 schließt und die Gaszuleitung 21 zum Gasbrenner 1 gesperrt wird.To start up the
Erfindungsgemäß ist in der
Ein Zeitverlauf der vom Temperatursensor 33 gemessenen Temperatur TK der elektronischen Komponenten 13, 14 ist in dem Temperaturdiagramm der
Im zweiten Ausführungsbeispiel der
In der
In der
Alternativ oder zusätzlich können die betriebsunfähig geschalteten Gasbrenner auch dann wieder betriebsbereit geschaltet werden, wenn die Komponenten-Temperatur TK in einem Steigungswinkel α fällt, der größer als ein vorbestimmter Steigungswinkel ist. Der vorbestimmte Steigungswinkel ist in der Steuereinrichtung 14 gespeichert. So wird gemäß dem Temperaturdiagramm der
Der erfasste Steigungswinkel α ist größer als der gespeicherte Steigungswinkel. Als Folge schaltet die Steuereinrichtung 14 den ersten Gasbrenner 1 vorauseilend wieder betriebsbereit, noch bevor die Komponenten-Temperatur TK wieder unter die unkritische Temperaturgrenze T1 gefallen ist.The detected pitch angle α is greater than the stored pitch angle. As a result, the
Claims (15)
- Method of operating a cooking hob, particularly a gas cooking hob, with at least two cooking positions (1, 2, 3, 4) and with at least one electronic control component (13, 14), of which cooking positions at least one second cooking position (2, 3, 4) is spaced further from the electronic component (13, 14) than a first cooking position (1), characterised in that the first cooking position (1) is taken out of operation or the heating power output (P1) thereof is reduced if a temperature (TK) of the electronic component (13, 14) exceeds a temperature limit (T1), whilst the second cooking position (2, 3, 4) remains operationally ready or the heating power output (P2, P3, P4) thereof remains unchanged.
- Method according to claim 1, characterised in that the temperature limit (T1) lies below, particularly in an order of magnitude of approximately 20 K, a temperature range reached in the case of maximum permissible thermal loading of the electronic component (13, 14).
- Method according to one of the preceding claims, characterised in that the operational capability or the heating power output (P1) of the first cooking position (1) is restored again even during cooking hob operation.
- Method according to claim 3, characterised in that the restoration of the first cooking position (1) is carried out when a predetermined cooling-down time interval (ta) has elapsed.
- Method according to claim 4, characterised in that the length of the cooling-down time period (ta) is predetermined on the basis of the time plot of the component temperature (TK) directly after entry into the cooling-down time period (ta).
- Method according to any one of claims 3 to 5, characterised in that the restoration of the first cooking position (1) is carried out when the time plot of the component temperature (TK) drops into a gradient angle (α) greater than a predetermined gradient angle.
- Method according to any one of claims 3 to 6, characterised in that the restoration of the first cooking position (1) is carried out when the component temperature (TK) falls below the temperature limit (T1), preferably a temperature lower limit lying thereunder.
- Method according to any one of the preceding claims, characterised in that the heating power output (P1) of the first cooking position (1) after reinstatement corresponds with the heating power output (P1) prior to the temperature limit (T1) being exceeded.
- Method according to any one of the preceding claims, characterised in that after reduction of the heating power output (P1) has been carried out the first cooking position (1) is switched off if the component temperature (TK) has not fallen below the temperature limit (T1).
- Method according to any one of the preceding claims, characterised in that in addition to the first cooking position (1) the second cooking position (2) is switched off or the heating power output (P2) thereof is reduced if the component temperature (TK) has not fallen below the temperature limit (T1) after a specific time period.
- Method according to any one of the preceding claims, characterised in that the second cooking position (2) is switched off or the heating power output (P2) thereof is reduced if the component temperature (TK) exceeds a second temperature limit (T2) lying above the first temperature limit (T1).
- Method according to any one of the preceding claims, characterised in that a number of temperature limits (T1, T2, T3, T4) is stored and that at least one of the cooking positions (1, 2, 3, 4) is switched to be operationally incapable or the heating power output (P1, P2, P3, P4) thereof is reduced if the component temperature (TK) exceeds one of the temperature limits (T1, T2, T3, T4).
- Method according to claim 12, characterised in that a respective temperature limit (T1, T2, T3, T4) is associated with each of the cooking positions (1, 2, 3, 4) of the cooking hob and the values of the temperature limits of the cooking positions rise with increasing spacing of the cooking positions from the electronic component (13, 14).
- Method according to any one of the preceding claims, characterised in that in the case of a gas cooking hob a cooling-down of the electronic component (13, 14) is assisted by a primary air flow (I) to the second cooking position (2, 3, 4) disposed in operation.
- Cooking hob, particularly gas cooking hob, with a control device (14), at least two cooking positions (1, 2, 3, 4) and at least one electronic component (13, 14), of which cooking positions at least one second cooking positions (2, 3, 4) is spaced further from the electronic component (13, 14) than a first cooking position (1), characterised in that the first cooking position (1) is taken out of operation or the heating power output (P1) thereof is reduced by means of the control device (14) if a temperature (TK) of the electronic component (13, 14) exceeds a temperature limit (T1), whilst the second cooking position (2, 3, 4) remains operationally ready or the heating power output (P2, P3, P4) thereof remains unchanged.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03775223A EP1565689B1 (en) | 2002-11-02 | 2003-10-23 | Method for operating a cooking hob, and cooking hob |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02024375 | 2002-11-02 | ||
EP02024375 | 2002-11-02 | ||
EP03775223A EP1565689B1 (en) | 2002-11-02 | 2003-10-23 | Method for operating a cooking hob, and cooking hob |
PCT/EP2003/011754 WO2004042283A1 (en) | 2002-11-02 | 2003-10-23 | Method for operating a cooking hob, and cooking hob |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1565689A1 EP1565689A1 (en) | 2005-08-24 |
EP1565689B1 true EP1565689B1 (en) | 2010-06-30 |
Family
ID=32309306
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03775223A Expired - Lifetime EP1565689B1 (en) | 2002-11-02 | 2003-10-23 | Method for operating a cooking hob, and cooking hob |
Country Status (7)
Country | Link |
---|---|
US (1) | US7150626B2 (en) |
EP (1) | EP1565689B1 (en) |
AT (1) | ATE472707T1 (en) |
AU (1) | AU2003283298A1 (en) |
DE (1) | DE50312851D1 (en) |
ES (1) | ES2346305T3 (en) |
WO (1) | WO2004042283A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7669590B2 (en) * | 2003-09-25 | 2010-03-02 | Bsh Bosch Und Siemens Hausgeraete Gmbh | Gas cooking surface |
CN101248313B (en) * | 2005-08-16 | 2011-01-26 | Bsh博施及西门子家用器具有限公司 | Timer for a gas cooking hob |
ITTO20060168A1 (en) * | 2006-03-07 | 2007-09-08 | Itw Ind Components Srl | IGNITION AND CONTROL OF A FIRE IN A HOUSEHOLD APPLIANCE, IN PARTICULAR A BARBECUE PLAN |
KR100805630B1 (en) * | 2006-12-01 | 2008-02-20 | 주식회사 경동나비엔 | Combustion apparatus for a gas boiler |
US20090197212A1 (en) * | 2008-02-04 | 2009-08-06 | Maxitrol Company | Premix Burner Control System and Method |
WO2011009794A1 (en) * | 2009-07-24 | 2011-01-27 | BSH Bosch und Siemens Hausgeräte GmbH | Structure of a gas valve unit |
JP5576244B2 (en) * | 2010-11-02 | 2014-08-20 | 大阪瓦斯株式会社 | Gas stove and cabinet with gas stove equipped with the same |
US9841191B2 (en) | 2015-04-22 | 2017-12-12 | Whirlpool Corporation | Appliance with electronically-controlled gas flow to burners |
US20170097159A1 (en) * | 2015-10-06 | 2017-04-06 | Illinois Tool Works Inc. | Open top range and associated gas distribution system |
JP6812078B2 (en) * | 2017-02-17 | 2021-01-13 | 株式会社ハーマン | Gas grill |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3315333A1 (en) | 1983-04-28 | 1984-10-31 | E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen | COOKER WITH MULTIPLE ELECTRIC COOKING PLATES |
EP0124022B1 (en) * | 1983-04-30 | 1989-06-07 | Schott Glaswerke | Cooker hob with gas heated hot plates and a continuous cooking area of glass-ceramic or similar material |
DE3519035A1 (en) * | 1985-05-25 | 1986-11-27 | E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen | Electrical hotplate |
DE8515560U1 (en) | 1985-05-25 | 1985-08-29 | E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen | Hotplate heating |
DE3535743A1 (en) | 1985-10-07 | 1987-04-16 | Gerhard Sedlmeir | Cut-out protection device for electric cookers |
DE4138814C2 (en) | 1991-11-26 | 2002-08-01 | Ego Elektro Geraetebau Gmbh | Temperature Control Unit |
GB2269451B (en) | 1992-08-06 | 1996-03-27 | Pompe Dev Ltd | Cooking hobs |
DE19630031A1 (en) | 1996-07-25 | 1998-01-29 | Schubert Werner | Protection against overheating for electric cooker plates |
US6280179B1 (en) * | 1999-11-29 | 2001-08-28 | Honeywell International Inc. | Over temperature limiting scheme by reducing gas pressure |
DE10045655A1 (en) | 2000-09-15 | 2002-04-18 | Aeg Hausgeraete Gmbh | Fitted hob |
-
2003
- 2003-10-23 AT AT03775223T patent/ATE472707T1/en not_active IP Right Cessation
- 2003-10-23 US US10/533,542 patent/US7150626B2/en not_active Expired - Lifetime
- 2003-10-23 DE DE50312851T patent/DE50312851D1/en not_active Expired - Lifetime
- 2003-10-23 ES ES03775223T patent/ES2346305T3/en not_active Expired - Lifetime
- 2003-10-23 EP EP03775223A patent/EP1565689B1/en not_active Expired - Lifetime
- 2003-10-23 AU AU2003283298A patent/AU2003283298A1/en not_active Abandoned
- 2003-10-23 WO PCT/EP2003/011754 patent/WO2004042283A1/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
WO2004042283A1 (en) | 2004-05-21 |
US20060118100A1 (en) | 2006-06-08 |
DE50312851D1 (en) | 2010-08-12 |
AU2003283298A1 (en) | 2004-06-07 |
ES2346305T3 (en) | 2010-10-14 |
US7150626B2 (en) | 2006-12-19 |
EP1565689A1 (en) | 2005-08-24 |
ATE472707T1 (en) | 2010-07-15 |
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