EP1505344B1 - electric activated device to shut off the gas flame of one of several cooking units - Google Patents

electric activated device to shut off the gas flame of one of several cooking units Download PDF

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Publication number
EP1505344B1
EP1505344B1 EP04012387.9A EP04012387A EP1505344B1 EP 1505344 B1 EP1505344 B1 EP 1505344B1 EP 04012387 A EP04012387 A EP 04012387A EP 1505344 B1 EP1505344 B1 EP 1505344B1
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EP
European Patent Office
Prior art keywords
switching
gas
coil
thermocouple
solenoid valve
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.)
Expired - Lifetime
Application number
EP04012387.9A
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German (de)
French (fr)
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EP1505344A2 (en
EP1505344A3 (en
Inventor
Klaus Anders
Bernhard Weinmann
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Siebe Appliance Controls GmbH
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Siebe Appliance Controls GmbH
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Publication date
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Priority to SI200432175T priority Critical patent/SI1505344T1/en
Priority to PL04012387T priority patent/PL1505344T3/en
Publication of EP1505344A2 publication Critical patent/EP1505344A2/en
Publication of EP1505344A3 publication Critical patent/EP1505344A3/en
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Publication of EP1505344B1 publication Critical patent/EP1505344B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/20—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays
    • F23N5/203—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/10—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples
    • F23N5/102—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/242—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q9/00—Pilot flame igniters
    • F23Q9/08—Pilot flame igniters with interlock with main fuel supply
    • F23Q9/12—Pilot flame igniters with interlock with main fuel supply to permit the supply to the main burner in dependence upon existence of pilot flame
    • F23Q9/14—Pilot flame igniters with interlock with main fuel supply to permit the supply to the main burner in dependence upon existence of pilot flame using electric means, e.g. by light-sensitive elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2223/00—Signal processing; Details thereof
    • F23N2223/22—Timing network
    • F23N2223/26—Timing network with capacitors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/06—Fail safe for flame failures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/30—Representation of working time
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/22—Fuel valves cooperating with magnets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2237/00—Controlling
    • F23N2237/02—Controlling two or more burners

Definitions

  • the invention relates to a device for electrically controlled switching off of the gas flame of one of a plurality of combustion chambers, each of which is supplied via a magnetic valve combustible gas, with a plurality of solenoid valves, each comprising a magnetic coil, wherein the magnetic coil of the solenoid valve is fed by a magnetic coil associated thermocouple, that forms a thermal circuit with the magnetic coil, wherein the magnetic valve is held in the heated by the gas flame thermocouple in the open position.
  • thermocouples With thermal electrical safety function are known. To turn on the gas flame, the valve is opened manually by pressing, whereby u.a. a magnetic circuit is closed.
  • a thermocouple powers the solenoid coil. This thermocouple is heated by the monitored gas flame. After the flame has heated the thermocouple for a few seconds, the thermo-current of the thermocouple is high enough to keep the magnetic circuit closed and to hold the gas valve in the open position. If the flame extinguishes due to overcooking food, wind or the like, the thermo-current of the thermocouple decreases and the valve drops or closes automatically and remains in the closed position.
  • thermo-current of the thermocouple is interrupted by opening the relay contact and the gas valve closes.
  • additional contact resistances and residual stresses which are brought into the thermal circuit through the wiring and the timer.
  • These "voltage losses" must be compensated by a higher thermal voltage, which is achieved only after a longer heat-up time.
  • the valve has to be held manually in the open position for a longer time, which makes the system less attractive for everyday use.
  • the reliability of the system suffers from contamination of the relay contacts. Dirt also prevents the valve from opening permanently.
  • thermocouple upon ignition of a gas flame provides an electrical current which is applied to a solenoid of a solenoid valve, so that the solenoid valve maintains the gas supply to the burner until a predetermined period of time is connected to a DC power source capacitor is connected to the solenoid and neutralized by an opposite direction of energization of the magnetic coil, the magnetic field, so that the gas supply to the burner is terminated.
  • the EP 1113227 A2 discloses a device for obtaining a quick ignition of a gas burner of a hob, which is fed via a solenoid valves with gas line, wherein the gas burner, a detonator and a knob for controlling the activation are connected, wherein the solenoid valves with drive means, which in the by Burner generated flame are immersed, connected to hold the solenoid valves in a working position and the gas supply to ensure the gas burner, wherein the solenoid valves are connected to electrical generator means, which are activated for a predetermined period of time following the actuation of the button for activating the connected burner, and which are connected to timer means, wherein the generator means for each solenoid valve, an electric Have transformer.
  • An object of the present invention is to provide a device for electrically controlled shutdown of the gas flame of a burner, which manages without a relay or without mechanically moving parts.
  • the advantages of the solution according to the invention are, in particular, that the sensitive thermostatic circuit is not interrupted for switching off and that no mechanically moving parts prone to soiling are required.
  • a technically and electrically uncritical parallel connection is created to the thermal circuit in the vicinity of the solenoid valve.
  • a compensation capacitor supplying the storage capacitor is provided. Since the compensation current only has to flow for a fraction of a second in order to drop the magnetic circuit, a capacitor forms a cost-effective and much simpler solution, for example with respect to a power supply.
  • the storage capacitor is connected via a plurality of switching devices with a corresponding number of Thermostrom Vietnamese manicure.
  • the storage capacitor is connected to a charging device, in particular a charging resistor, which ensures that the storage capacitor is constantly charged.
  • the switching device is designed as an electrically controlled switch, in particular semiconductor switch.
  • the switching device is controlled by a timer to program shutdown times can.
  • This timer has a plurality of independent time programs for switching a plurality of switching devices for a plurality of burners.
  • the timer can also have a safety device for switching off all gas flames after a predefinable maximum time of for example 3 hours.
  • the time is chosen so that it is longer than a typical burning time, for example, a gas stove is. After the safety time has elapsed, all gas flames are switched off for safety reasons.
  • the timer has a number of burners corresponding number of Zeitvor Mosasten and a common time reset button. As a result, the number of controls is limited to the essentials.
  • thermo-circuit 10 consists of a thermocouple 11, which is connected to the solenoid coil 12 of a solenoid valve 13.
  • a combustible gas leading gas line 14 leads to a burner 15, for example, the focal point of a stove or a baking oven.
  • the solenoid valve 13 is connected in the gas line 14, wherein a valve member 16 is provided for shutting off and opening the gas line 14.
  • the gas line 14 terminating in the idle state valve member 16 is pressed by means of a manual actuator 17 in the open position, so that gas can flow to the burner 15.
  • This is ignited by means of a lighter, so that a gas flame 18 is formed.
  • This gas flame 18 heats the thermoelement 11 mounted in a correspondingly close spatial arrangement so that it generates a thermoelectric current which flows through the magnetic coil 12 of the solenoid valve 13.
  • the solenoid valve 13 and the valve member 16 is held in the open position, so that the manual actuator 17 can now be released.
  • thermocouple 11 cools down, and the decreasing thermo-current can not hold the valve member 16 in its open position, so that this falls back into the closed position and blocks the further gas supply.
  • This drop can be effected by means of a spring, not shown, and / or by gravity.
  • a timer 19 includes a capacitor 20 which is kept constantly in the charged state by means of a charging resistor 21.
  • This capacitor 20 is connected via a switch 22, for example, a semiconductor switch, parallel to the thermocouple 11 and to the solenoid coil 12.
  • the switch 22 can be closed by a time circuit, not shown, with turn-off Ta are programmable. If a switch-off time Ta is reached, the switch 22 closes, as a result of which a compensating current is briefly removed from the capacitor, which is fed into the thermal circuit 10 in such a way that it counteracts the thermal current. As a result, the solenoid valve 13 drops and the valve member 16 closes the gas line 14. After subsequently re-opened switch 22, the thermo-current of the thermocouple 11 is no longer able to open the solenoid valve 13.
  • the capacitor 20 is connected via a further, also time-controlled switch 23 with a further thermal circuit 24, but in FIG. 1 is not shown in detail, but only in FIG. 2 , Again, this in turn consists of a thermocouple 25 and the solenoid 26 of a magnetic valve, not shown in the other gas line in the gas line for another, also not shown focal point.
  • thermo circuits for further firing points can be connected to the condenser 20, the solenoid valves nevertheless being able to be switched off one after the other in the second range.
  • the timer 19 is shown in the outside view. It has next to a display 27 for the playback of the clock and the shutdown times to be set five Zeitvor Congressasten 28 to 32 for setting the desired shutdown for five burners or five Thermostrom Vietnamese and a common time reset button 33, which corrects the forward to be set by one of the Zeitpragsasten 28 to 32 serves.
  • a common time reset button 33 which corrects the forward to be set by one of the Zeitpragsasten 28 to 32 serves.
  • a safety shutdown is provided by the after burning periods, the usual typical burning times of e.g. go out for three hours, all gas flames are shut off for safety's sake. This can be done by means of an additional timer through which all switches 22, 23 are closed after the safety time. Since the time control is usually carried out in a microcontroller 34, the program only needs this shutdown time, after expiration of which corresponding control outputs all switches 22, 23 are closed.

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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)

Description

Die Erfindung betrifft eine Vorrichtung zum elektrisch gesteuerten Abschalten der Gasflamme einer von mehreren Brennstelle, denen jeweils über ein Magnetventil brennbares Gas zuführbar ist, mit mehreren Magnetventilen, die jeweils eine Magnetspule umfassen, wobei die Magnetspule des Magnetventils von einem der Magnetspule zugeordneten Thermoelement gespeist wird, das mit der Magnetspule einen Thermostromkreis bildet, wobei das Magnetventil bei durch die Gasflamme erhitztem Thermoelement in der Offenstellung gehalten wird.The invention relates to a device for electrically controlled switching off of the gas flame of one of a plurality of combustion chambers, each of which is supplied via a magnetic valve combustible gas, with a plurality of solenoid valves, each comprising a magnetic coil, wherein the magnetic coil of the solenoid valve is fed by a magnetic coil associated thermocouple, that forms a thermal circuit with the magnetic coil, wherein the magnetic valve is held in the heated by the gas flame thermocouple in the open position.

Gasventile mit thermisch elektrischer sicherheitsfunktion sind bekannt. Zum Einschalten der Gasflamme wird das Ventil manuell durch Drücken geöffnet, wodurch u.a. ein Magnetkreis geschlossen wird. Ein Thermoelement versorgt die Magnetspule mit Strom. Dieses Thermoelement wird von der zu überwachenden Gasflamme beheizt. Nachdem die Flamme ein paar Sekunden das Thermoelement aufgeheizt hat, ist der Thermostrom des Thermoelements genügend hoch, um den Magnetkreis geschlossen zu halten und das Gasventil in der Offenstellung zu halten. Erlischt die Flamme durch überkochendes Gargut, wind oder dergleichen, sinkt der Thermostrom des Thermoelements ab und das Ventil fällt ab bzw, schließt sich automatisch und bleibt auch in der Schließstellung.Gas valves with thermal electrical safety function are known. To turn on the gas flame, the valve is opened manually by pressing, whereby u.a. a magnetic circuit is closed. A thermocouple powers the solenoid coil. This thermocouple is heated by the monitored gas flame. After the flame has heated the thermocouple for a few seconds, the thermo-current of the thermocouple is high enough to keep the magnetic circuit closed and to hold the gas valve in the open position. If the flame extinguishes due to overcooking food, wind or the like, the thermo-current of the thermocouple decreases and the valve drops or closes automatically and remains in the closed position.

Will man nun eine Zeitschaltfunktion realisieren, so besteht eine bekannte Möglichkeit darin, den Thermostrom des Thermoelements über ein Relais zu führen. Zum Ausschalten der Gas-flamme wird der Thermostrom durch Öffnen des Relaiskontaktes unterbrochen und das Gasventil schließt. Nachteilig an dieser bekannten Anordnung sind die zusätzlichen Übergangswiderstände und Restspannungen, welche in den Thermostromkreis durch die Verdrahtung und die Schaltuhr gebracht werden. Diese "Verlustspannungen" müssen durch eine höhere Thermospannung ausgeglichen werden, die jedoch erst nach einer längeren Aufheizzeit erreicht wird. Dies hat zur Folge, dass das Ventil länger manuell in der Offenstellung gehalten werden muss, was das System für den täglichen Gebrauch wenig attraktiv macht. Zusätzlich leidet die Funktionssicherheit des Systems durch verschmutzungen der Relaiskontakte. Verschmutzungen verhindern auch das dauerhafte Offenhalten des Ventils.If one now wants to realize a timer function, it is a known possibility to guide the thermo-current of the thermocouple via a relay. To turn off the gas flame the thermo-current is interrupted by opening the relay contact and the gas valve closes. A disadvantage of this known arrangement, the additional contact resistances and residual stresses, which are brought into the thermal circuit through the wiring and the timer. These "voltage losses" must be compensated by a higher thermal voltage, which is achieved only after a longer heat-up time. As a result, the valve has to be held manually in the open position for a longer time, which makes the system less attractive for everyday use. In addition, the reliability of the system suffers from contamination of the relay contacts. Dirt also prevents the valve from opening permanently.

Aus der JP 62293016 ist eine ventileinrichtung zur Beeinflussung einer Gasversorgung einer Brennstelle bekannt, bei der ein Thermoelement beim Zünden einer Gasflamme einen elektrischen Strom bereitstellt, der an eine Magnetspule eines Magnetventils angelegt wird, so dass das Magnetventil die Gasversorgung der Brennstelle aufrechterhält, bis bei Ablauf einer vorbestimmten Zeitdauer ein an einer Gleichstromquelle aufgeladener Kondensator mit der Magnetspule verbunden wird und durch eine gegensinnige Bestromung der Magnetspule das Magnetfeld neutralisiert, so dass die Gasversorgung der Brennstelle beendet wird.From the JP 62293016 a valve device for influencing a gas supply to a burner is known in which a thermocouple upon ignition of a gas flame provides an electrical current which is applied to a solenoid of a solenoid valve, so that the solenoid valve maintains the gas supply to the burner until a predetermined period of time is connected to a DC power source capacitor is connected to the solenoid and neutralized by an opposite direction of energization of the magnetic coil, the magnetic field, so that the gas supply to the burner is terminated.

Die EP 1113227 A2 offenbart eine Vorrichtung zum Erlangen einer schnellen Zündung eines Gasbrenners eines Kochfeldes, das über eine mit Magnetventilen versehene Gasleitung gespeist wird, wobei mit dem Gasbrenner ein Zünder und ein Knopf zum Steuern der Aktivierung verbunden sind, wobei die Magnetventile mit Antriebsmitteln, die in die durch den Brenner erzeugte Flamme eingetaucht sind, verbunden sind, um die Magnetventile in einer Arbeitsposition zu halten und die Gasspeisung zum Gasbrenner zu gewährleisten, wobei die Magnetventile mit elektrischen Generatormitteln verbunden sind, die für eine vorbestimmte Zeitperiode, die der Betätigung des Knopfes zum Aktivieren des verbundenen Brenners folgt, aktiviert werden, und die mit Zeitgebermitteln verbunden sind, wobei die Generatormittel für jedes Magnetventil einen elektrischen Transformator aufweisen.The EP 1113227 A2 discloses a device for obtaining a quick ignition of a gas burner of a hob, which is fed via a solenoid valves with gas line, wherein the gas burner, a detonator and a knob for controlling the activation are connected, wherein the solenoid valves with drive means, which in the by Burner generated flame are immersed, connected to hold the solenoid valves in a working position and the gas supply to ensure the gas burner, wherein the solenoid valves are connected to electrical generator means, which are activated for a predetermined period of time following the actuation of the button for activating the connected burner, and which are connected to timer means, wherein the generator means for each solenoid valve, an electric Have transformer.

Eine Aufgabe der vorliegenden Erfindung besteht darin, eine Vorrichtung zum elektrisch gesteuerten Abschalten der Gasflamme einer Brennstelle zu schaffen, die ohne ein Relais bzw. ohne mechanisch bewegte Teile auskommt.An object of the present invention is to provide a device for electrically controlled shutdown of the gas flame of a burner, which manages without a relay or without mechanically moving parts.

Diese Aufgabe wird erfindungsgemäß mit den Merkmalen das Anspruchs 1 gelöst.This object is achieved with the features of claim 1.

Die Vorteile der erfindungsgemäßen Lösung bestehen insbesondere darin, dass der sensible Thermostromkreis zum Abschalten nicht unterbrochen wird und dass keine zu Verschmutzungen neigenden mechanisch bewegbaren Teile erforderlich sind. Bei der erfindungsgemäßen Lösung einer Abschaltung mittels eines Kompensationsstroms wird eine technisch und elektrisch unkritische Parallelverbindung zum Thermokreis in der Nähe des Magnetventils geschaffen.The advantages of the solution according to the invention are, in particular, that the sensitive thermostatic circuit is not interrupted for switching off and that no mechanically moving parts prone to soiling are required. In the inventive solution of a shutdown by means of a compensation current, a technically and electrically uncritical parallel connection is created to the thermal circuit in the vicinity of the solenoid valve.

Dabei ist ein den Kompensationsstrom liefernder Speicherkondensator vorgesehen. Da der Kompensationsstrom nur während des Bruchteils einer Sekunde fließen muss, um den Magnetkreis abfallen zu lassen, bildet ein Kondensator eine kostengünstige und wesentlich einfachere Lösung beispielsweise gegenüber einem Netzteil.In this case, a compensation capacitor supplying the storage capacitor is provided. Since the compensation current only has to flow for a fraction of a second in order to drop the magnetic circuit, a capacitor forms a cost-effective and much simpler solution, for example with respect to a power supply.

Der Speicherkondensator ist über über mehrere Schalteinrichtungen mit einer entsprechenden Zahl von Thermostromkreisen verbunden.The storage capacitor is connected via a plurality of switching devices with a corresponding number of Thermostromkreisen.

Der speicherkondensator ist mit einer Ladeeinrichtung, insbesondere einem Ladewiderstand, verbunden, der dafür sorgt, dass der Speicherkondensator ständig geladen ist.The storage capacitor is connected to a charging device, in particular a charging resistor, which ensures that the storage capacitor is constantly charged.

Die Schalteinrichtung ist als elektrisch gesteuerter Schalter, insbesondere Halbleiterschalter, ausgebildet.The switching device is designed as an electrically controlled switch, in particular semiconductor switch.

Die Schalteinrichtung ist durch eine zeitschaltuhr gesteuert, um Abschaltzeiten programmieren zu können. Diese Zeitschaltuhr weist mehrere voneinander unabhängige Zeitprogramme zum Schalten mehrerer Schalteinrichtungen für mehrere Brennstellen auf.The switching device is controlled by a timer to program shutdown times can. This timer has a plurality of independent time programs for switching a plurality of switching devices for a plurality of burners.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Anspruch 1 angegebenen Vorrichtung möglich.The measures listed in the dependent claims advantageous refinements and improvements of claim 1 device are possible.

Die Zeitschaltuhr kann auch eine Sicherheitseinrichtung zum Ausschalten aller Gasflammen nach einer vorgebbaren Maximalzeit von beispielsweise 3 Stunden besitzen. Die Zeit wird dabei so gewählt, dass sie länger ist als eine typische Brenndauer, beispielsweise eines Gasherdes ist. Nach Ablauf der Sicherheitszeit werden alle Gasflammen sicherheitshalber abgeschaltet.The timer can also have a safety device for switching off all gas flames after a predefinable maximum time of for example 3 hours. The time is chosen so that it is longer than a typical burning time, for example, a gas stove is. After the safety time has elapsed, all gas flames are switched off for safety reasons.

In einer konstruktiv und bedienungsmäßig einfachen und günstigen Ausgestaltung besitzt die Zeitschaltuhr eine der Zahl der Brennstellen entsprechende zahl von Zeitvorstelltasten und eine gemeinsame Zeitrückstelltaste. Hierdurch wird die Zahl der Bedienelemente auf das Notwendigste beschränkt.In a constructive and easy to use and convenient configuration, the timer has a number of burners corresponding number of Zeitvorstelltasten and a common time reset button. As a result, the number of controls is limited to the essentials.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen:

Figur 1
eine schematische schaltungsmäßige Darstellung der Abschaltvorrichtung mit einer den mehreren Kompensationsstrom erzeugenden Zeitschaltuhr und
Figur 2
dasselbe Ausführungsbeispiel mit zwei Thermostromkreisen, wobei die Zeitschaltuhr in der Außenansicht dargestellt ist.
An embodiment of the invention is illustrated in the drawing and explained in more detail in the following description. Show it:
FIG. 1
a schematic circuit diagram of the shutdown device with a multiple compensating current generating timer and
FIG. 2
the same embodiment with two Thermostromkreisen, the timer is shown in the outer view.

Bei dem in den Figuren 1 und 2 dargestellten Ausführungsbeispiel besteht ein Thermostromkreis 10 aus einem Thermoelement 11, das mit der Magnetspule 12 eines Magnetventils 13 verbunden ist. Eine brennbares Gas führende Gasleitung 14 führt zu einer Brennstelle 15, beispielsweise die Brennstelle eines Herdes oder eines Backofens. Das Magnetventil 13 ist in die Gasleitung 14 geschaltet, wobei ein Ventilglied 16 zum Absperren und Öffnen der Gasleitung 14 vorgesehen ist.In the in the Figures 1 and 2 illustrated embodiment, a thermo-circuit 10 consists of a thermocouple 11, which is connected to the solenoid coil 12 of a solenoid valve 13. A combustible gas leading gas line 14 leads to a burner 15, for example, the focal point of a stove or a baking oven. The solenoid valve 13 is connected in the gas line 14, wherein a valve member 16 is provided for shutting off and opening the gas line 14.

Zum Anzünden wird das im Ruhezustand die Gasleitung 14 abschließende Ventilglied 16 mittels eines manuellen Betätigungsglieds 17 in die Offenstellung gedrückt, so dass Gas zur Brennstelle 15 strömen kann. Dieses wird mittels eines Anzünders angezündet, so dass eine Gasflamme 18 entsteht. Diese Gasflamme 18 erhitzt das in entsprechend naher räumlicher Anordnung angebrachte Thermoelement 11, so dass dieses einen Thermostrom erzeugt, der durch die Magnetspule 12 des Magnetventils 13 fließt. Durch diesen Thermostrom wird das Magnetventil 13 bzw. das Ventilglied 16 in der Offenstellung gehalten, so dass das manuelle Betätigungsglied 17 nunmehr losgelassen werden kann. Erlischt die Gasflamme 18 durch irgendwelche Einwirkungen, so kühlt sich das Thermoelement 11 ab, und der sich verringernde Thermostrom kann das Ventilglied 16 nicht mehr in seiner Offenstellung halten, so dass dieses in die Schließstellung zurückfällt und die weitere Gaszufuhr sperrt. Dieses Abfallen kann mittels einer nicht dargestellten Feder und/oder durch Schwerkraft bewirkt werden.For lighting, the gas line 14 terminating in the idle state valve member 16 is pressed by means of a manual actuator 17 in the open position, so that gas can flow to the burner 15. This is ignited by means of a lighter, so that a gas flame 18 is formed. This gas flame 18 heats the thermoelement 11 mounted in a correspondingly close spatial arrangement so that it generates a thermoelectric current which flows through the magnetic coil 12 of the solenoid valve 13. By this thermo-current, the solenoid valve 13 and the valve member 16 is held in the open position, so that the manual actuator 17 can now be released. If the gas flame 18 extinguishes due to any influences, the thermocouple 11 cools down, and the decreasing thermo-current can not hold the valve member 16 in its open position, so that this falls back into the closed position and blocks the further gas supply. This drop can be effected by means of a spring, not shown, and / or by gravity.

Eine Zeitschaltuhr 19 enthält einen Kondensator 20, der mit Hilfe eines Ladewiderstandes 21 ständig im aufgeladenen Zustand gehalten wird. Dieser Kondensator 20 ist über einen Schalter 22, beispielsweise einen Halbleiterschalter, parallel zum Thermoelement 11 bzw. zur Magnetspule 12 geschaltet. Der Schalter 22 kann über einen nicht näher dargestellten Zeitschaltkreis geschlossen werden, wobei Ausschaltzeiten Ta einprogrammierbar sind. Ist eine Ausschaltzeit Ta erreicht, so schließt der Schalter 22, wodurch kurzzeitig ein Kompensationsstrom dem Kondensator entnommen wird, der in den Thermostromkreis 10 derart eingespeist wird, dass er dem Thermostrom entgegen wirkt. Hierdurch fällt das Magnetventil 13 ab und das Ventilglied 16 verschließt die Gasleitung 14. Nach anschließend wieder geöffnetem Schalter 22 ist der Thermostrom des Thermoelements 11 nicht mehr in der Lage, das Magnetventil 13 zu öffnen.A timer 19 includes a capacitor 20 which is kept constantly in the charged state by means of a charging resistor 21. This capacitor 20 is connected via a switch 22, for example, a semiconductor switch, parallel to the thermocouple 11 and to the solenoid coil 12. The switch 22 can be closed by a time circuit, not shown, with turn-off Ta are programmable. If a switch-off time Ta is reached, the switch 22 closes, as a result of which a compensating current is briefly removed from the capacitor, which is fed into the thermal circuit 10 in such a way that it counteracts the thermal current. As a result, the solenoid valve 13 drops and the valve member 16 closes the gas line 14. After subsequently re-opened switch 22, the thermo-current of the thermocouple 11 is no longer able to open the solenoid valve 13.

Der Kondensator 20 ist über einen weiteren, ebenfalls zeitgesteuerten Schalter 23 mit einem weiteren Thermostromkreis 24 verbunden, der jedoch in Figur 1 nicht näher dargestellt ist, sondern lediglich in Figur 2. Auch dieser besteht wiederum aus einem Thermoelement 25 und der Magnetspule 26 eines im Übrigen nicht dargestellten Magnetventils in der Gasleitung für eine weitere, ebenfalls nicht näher dargestellte Brennstelle.The capacitor 20 is connected via a further, also time-controlled switch 23 with a further thermal circuit 24, but in FIG. 1 is not shown in detail, but only in FIG. 2 , Again, this in turn consists of a thermocouple 25 and the solenoid 26 of a magnetic valve, not shown in the other gas line in the gas line for another, also not shown focal point.

Entsprechend sind an den Kondensator 20 noch weitere Thermostromkreise für weitere Brennstellen angeschlossen werden, wobei die Magnetventile dennoch im Sekundenbereich nacheinander abgeschaltet werden können.Correspondingly, further thermo circuits for further firing points can be connected to the condenser 20, the solenoid valves nevertheless being able to be switched off one after the other in the second range.

In Figur 2 ist die Zeitschaltuhr 19 in der Außenansicht dargestellt. Sie besitzt neben einem Display 27 für die Wiedergabe der Uhrzeit und der einzustellenden Abschaltzeiten fünf Zeitvorstelltasten 28 bis 32 zum Einstellen der gewünschten Abschaltzeiten für fünf Brennstellen bzw. fünf Thermostromkreise sowie eine gemeinsame Zeitrückstelltaste 33, die zur Korrektur der vorwärts einzustellenden Abschaltzeit durch eine der Zeitvorstelltasten 28 bis 32 dient. Selbstverständlich könnte man auch mehrere Zeitrückstelltasten 33 vorsehen oder die Zeiteinstellung erfolgt gemäß einer von mehreren bekannten Methoden zur Einstellung von Schaltuhrenzeiten.In FIG. 2 the timer 19 is shown in the outside view. It has next to a display 27 for the playback of the clock and the shutdown times to be set five Zeitvorstelltasten 28 to 32 for setting the desired shutdown for five burners or five Thermostromkreise and a common time reset button 33, which corrects the forward to be set by one of the Zeitpragsasten 28 to 32 serves. Of course, one could also provide several time reset buttons 33 or the time setting is done according to one of several known methods for setting Schaltuhrzeiten.

In der Zeitschaltuhr ist noch eine Sicherheitsabschaltung vorgesehen, durch die nach Brenndauern, die über übliche typische Brenndauern von z.B. drei Stunden hinausgehen, alle Gasflammen sicherheitshalber abgeschaltet werden. Dies kann mittels eines zusätzlichen Zeitglieds erfolgen, durch das nach der Sicherheitszeit alle Schalter 22, 23 geschlossen werden. Da die Zeitsteuerung üblicherweise in einem Microcontroller 34 erfolgt, braucht dessen Programm lediglich diese Abschaltzeit enthalten, nach Ablauf derer entsprechende Steuerausgänge alle Schalter 22, 23 geschlossen werden.In the timer is still a safety shutdown is provided by the after burning periods, the usual typical burning times of e.g. go out for three hours, all gas flames are shut off for safety's sake. This can be done by means of an additional timer through which all switches 22, 23 are closed after the safety time. Since the time control is usually carried out in a microcontroller 34, the program only needs this shutdown time, after expiration of which corresponding control outputs all switches 22, 23 are closed.

Claims (5)

  1. Device for the electrically controlled switching off of the gas flame of one of several burning points (15) to each of which a combustible gas can be supplied via a solenoid valve (13), the device comprising a plurality of solenoid valves (13), each comprising a coil (12, 26), wherein the coil (12, 16) of the solenoid valve (13) is fed by a thermocouple (11, 25) which is assigned to the coil (12, 16) and which forms a thermoelectric circuit (10, 24) with the coil (12, 16), wherein the solenoid valve (13) is held in the open position when the thermocouple (11, 25) is heated by the gas flame, and further comprising a switching device (22, 23) which is assigned to the thermoelectric circuit (10, 24) and which is provided for feeding a compensation current causing a dropping of the solenoid valve (13) into the closed position into the thermoelectric circuit (10, 24) of the coil (12, 26) connected to the thermocouple (11, 25), and further comprising a storage capacitor (20) which supplies the compensation current and which is connected via a plurality of switching devices (22, 23) to a corresponding number of thermoelectric circuits (10, 24) and which is connected to a charging device (21), wherein the switching device (22, 23) is designed as an electrically controlled switch and is controlled by a timing unit (34), and further comprising a timing unit (34) having a plurality of mutually independent timing programmes for switching a plurality of switching devices (22, 23) for a plurality of burning points (15).
  2. Device according to claim 1, characterised in that the charging device (21) is designed as a charging resistor.
  3. Device according to claim 1 or 2, characterised in that the electrically controllable switch is designed as a semiconductor switch.
  4. Device according to claim 1, 2 or 3, characterised in that the timing unit (34) comprises a safety device for switching off all gas flames (18) after a presettable maximum time.
  5. Device according to claim 1, 2, 3 or 4, characterised in that the timer switch (19) containing the timing unit (34) has a number of time presetting keys (28 to 32) corresponding to the number of burning points and a common time resetting key (33).
EP04012387.9A 2003-08-02 2004-05-26 electric activated device to shut off the gas flame of one of several cooking units Expired - Lifetime EP1505344B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI200432175T SI1505344T1 (en) 2003-08-02 2004-05-26 electric activated device to shut off the gas flame of one of several cooking units
PL04012387T PL1505344T3 (en) 2003-08-02 2004-05-26 electric activated device to shut off the gas flame of one of several cooking units

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10335465A DE10335465A1 (en) 2003-08-02 2003-08-02 Device for electrically controlled switching off the gas flame of a combustion station
DE10335465 2003-08-02

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EP1505344A2 EP1505344A2 (en) 2005-02-09
EP1505344A3 EP1505344A3 (en) 2010-06-02
EP1505344B1 true EP1505344B1 (en) 2014-04-30

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EP (1) EP1505344B1 (en)
DE (1) DE10335465A1 (en)
ES (1) ES2485843T3 (en)
PL (1) PL1505344T3 (en)
SI (1) SI1505344T1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2004917C2 (en) * 2010-06-18 2011-12-20 Intell Properties B V Device and method for electrically controlled turning off of a gas flame of a gas hob.
IT201700017422A1 (en) * 2017-02-16 2018-08-16 Vanni Gallocchio SAFETY DEVICE FOR GAS BURNERS OF STOVES, KITCHENS AND COOKTOPS IN GENERAL

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1098811A (en) * 1963-07-19 1968-01-10 Seemark Switches Ltd Improvements in timers or safety cut-outs for fuel-burning appliances
DE1233793B (en) * 1964-05-27 1967-02-09 Krefft Aktien Ges W Device for securing gas burners on gas appliances
JPS62293016A (en) * 1986-06-11 1987-12-19 Matsushita Electric Ind Co Ltd Gas appliance with time limit device
JPH0292450A (en) * 1988-09-30 1990-04-03 Nok Corp Method for removing pattern from forming product and induction heating type pattern removing device
IT1283738B1 (en) * 1996-04-15 1998-04-30 Whirpool Europ S R L GAS OPERATING APPLIANCE FOR HEATING AND / OR COOKING FOOD AND SIMILAR
JP3693196B2 (en) * 1996-05-24 2005-09-07 パロマ工業株式会社 Gas cooker
IT1313950B1 (en) * 1999-12-16 2002-09-26 Whirlpool Co DEVICE TO OBTAIN THE QUICK IGNITION OF A GAS BURNER A HOB SUPPLIED THROUGH A GAS PIPE
KR100359624B1 (en) * 2000-02-29 2002-11-07 최영규 Open Time Controlable Valve Assembly with Electronic Timer
US20020073985A1 (en) * 2000-12-18 2002-06-20 Bsh Home Appliances Corporation Pulsed sequence burner control with valve

Also Published As

Publication number Publication date
EP1505344A2 (en) 2005-02-09
EP1505344A3 (en) 2010-06-02
DE10335465A1 (en) 2005-03-03
PL1505344T3 (en) 2014-09-30
SI1505344T1 (en) 2014-08-29
ES2485843T3 (en) 2014-08-14

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