EP1505344A2 - Electric activated device to shut off the gas flame of a cooking unit - Google Patents

Electric activated device to shut off the gas flame of a cooking unit Download PDF

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Publication number
EP1505344A2
EP1505344A2 EP04012387A EP04012387A EP1505344A2 EP 1505344 A2 EP1505344 A2 EP 1505344A2 EP 04012387 A EP04012387 A EP 04012387A EP 04012387 A EP04012387 A EP 04012387A EP 1505344 A2 EP1505344 A2 EP 1505344A2
Authority
EP
European Patent Office
Prior art keywords
switching
thermocouple
time
gas
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.)
Granted
Application number
EP04012387A
Other languages
German (de)
French (fr)
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EP1505344B1 (en
EP1505344A3 (en
Inventor
Klaus Anders
Bernhard Weinmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siebe Appliance Controls GmbH
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Siebe Appliance Controls GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siebe Appliance Controls GmbH filed Critical Siebe Appliance Controls GmbH
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
Application granted granted Critical
Publication of EP1505344B1 publication Critical patent/EP1505344B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 Turning off the gas flame of a burner, the over a solenoid valve combustible gas is supplied, wherein the Solenoid of the solenoid valve powered by a thermocouple and the solenoid valve is heated by the gas flame Thermocouple is held in the open position.
  • thermocouples powers the solenoid with electricity. This thermocouple is to be monitored by the Heated gas flame. After the flame a few seconds the Thermocouple has heated, is the thermo-current of the thermocouple high enough to close the magnetic circuit hold and hold the gas valve in the open position. goes out the flame by overcooking food, wind or the like, the thermo-current of the thermocouple decreases and the Valve drops or closes automatically and remains also in the closed position.
  • thermo-current of the thermocouple via a relay.
  • the thermal current is opened by opening the relay contact interrupted and the gas valve closes.
  • the additional contact resistance and residual stresses, which in the thermal circuit through the wiring and the timer are brought.
  • These "Loss voltages” must be due to a higher thermoelectric voltage be compensated, but only after a long heat-up is reached. As a result, the valve longer manually held in the open position, what makes the system less attractive for everyday use.
  • the reliability of the system suffers Dirt on the relay contacts. Prevent contamination also the permanent keeping open of the valve.
  • An object of the present invention is to provide a Device for the electrically controlled switching off of the gas flame to create a combustion station without a relay or without mechanically moving parts.
  • This object is achieved in that a Switching device for feeding a sloping solenoid valve in the closed position causing compensation current in the thermal circuit of the thermocouple connected Magnet coil is provided.
  • the advantages of the solution according to the invention are in particular in that the sensitive thermostatic circuit turns off is not interrupted and that no too dirty tilting mechanically movable parts are required. at the inventive solution of a shutdown by means of a Compensation current becomes technically and electrically uncritical Parallel connection to the thermocircle near the Solenoid valve created.
  • a compensating current delivering Storage capacitor provided. Because the compensation current only has to flow during the fraction of a second, to drop the magnetic circuit forms a capacitor a cost-effective and much simpler solution, for example opposite a power supply.
  • the storage capacitor is via the switching device with connected to the thermal circuit and can also be used at several Thermostrom Vietnamese over several switching devices with a corresponding number of Thermostrom Vietnameseen be connected.
  • the storage capacitor is expediently with a charging device, in particular connected to a charging resistor be who ensures that the storage capacitor constantly loaded.
  • the switching device is preferably as electrically controllable Switch, in particular semiconductor switch formed.
  • the switching device is characterized by a Timer can be controlled to program shutdown times can.
  • This timer can be several if necessary independent time programs for switching a plurality of switching devices have for several burners.
  • the timer can also be a safety device for Switching off all gas flames after a predefinable maximum time for example, have 3 hours. Time will be there chosen so that it is longer than a typical burning time, for example, a gas stove. After expiration of Safety time all gas flames are shut down for safety's sake.
  • a thermal circuit 10 consists of a thermocouple 11, which is connected to the solenoid coil 12 of a solenoid valve 13 is.
  • a combustible gas leading gas line 14 leads to a focal point 15, for example, the focal point of a Stove or a baking oven.
  • the solenoid valve 13 is in the Gas line 14 connected, wherein a valve member 16 for shutting off and opening the gas line 14 is provided.
  • the gas line 14 is at rest Valve member 16 by means of a manual actuator 17 pressed into the open position, so that gas to Burner 15 can flow.
  • a manual actuator 17 pressed into the open position, so that gas to Burner 15 can flow.
  • This is done by means of a lighter ignited, so that a gas flame 18 is formed.
  • These Gas flame 18 heats the in a correspondingly close spatial arrangement attached thermocouple 11, so this one Thermostom generated by the solenoid coil 12 of the solenoid valve 13 flows.
  • This thermo-current becomes the solenoid valve 13 and the valve member 16 held in the open position, so that the manual actuator 17 is now released can be.
  • This drop can by means of a not shown Spring and / or caused by gravity.
  • a timer 19 includes a capacitor 20, which with Help of a charging resistor 21 constantly in the charged state is held.
  • This capacitor 20 is connected via a Switch 22, for example, a semiconductor switch, parallel connected to the thermocouple 11 and to the solenoid coil 12.
  • the switch 22 can via a non-illustrated Time circuit are closed, with off times Ta are programmable. If a switch-off time Ta is reached, so closes the switch 22, causing a temporary compensation current is taken from the capacitor, which in the Thermostrom Vietnamese 10 is fed so that it the thermo-current counteracts. As a result, the solenoid valve 13 drops and the valve member 16 closes the gas line 14.
  • Nach subsequently opened switch 22 is the thermo-current of the thermocouple 11 is no longer capable of the solenoid valve 13 to open.
  • the capacitor 20 is via another, also timed Switch 23 with a further thermal circuit 24th connected, which is not shown in detail in Figure 1, but only in Figure 2.
  • the timer 19 is shown in the outer view. It has next to a display 27 for playback the time and the shutdown times to be set five Timing buttons 28 to 32 for setting the desired Shutdown times for five burners or five thermo circuits and a common time reset button 33, which is for Correction of the shutdown time to be set forwards by a the time presentation keys 28 to 32 is used.
  • a display 27 for playback the time and the shutdown times to be set five Timing buttons 28 to 32 for setting the desired Shutdown times for five burners or five thermo circuits and a common time reset button 33, which is for Correction of the shutdown time to be set forwards by a the time presentation keys 28 to 32 is used.
  • a common time reset button 33 which is for Correction of the shutdown time to be set forwards by a the time presentation keys 28 to 32 is used.
  • time reset buttons 33 or the time adjustment is made according to one of several known Methods for setting switching times.

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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)

Abstract

The device has a magnetic valve (13) whose coil (12) is supplied by a thermoelement (11) and that is held in its open position by the thermoelement when it is heated by the gas flame. A switching device (22, 23) is provided for feeding a compensation current for causing the magnetic valve to drop into the closed position into the thermo-current circuit of the magnetic coil connected to the thermoelement.

Description

Die Erfindung betrifft eine Vorrichtung zum elektrisch gesteuerten Abschalten der Gasflamme einer Brennstelle, der über ein Magnetventil brennbares Gas zuführbar ist, wobei die Magnetspule des Magnetventils von einem Thermoelement gespeist wird und das Magnetventil bei durch die Gasflamme erhitzten Thermoelement in der Offenstellung gehalten wird.The invention relates to a device for electrically controlled Turning off the gas flame of a burner, the over a solenoid valve combustible gas is supplied, wherein the Solenoid of the solenoid valve powered by a thermocouple and the solenoid valve is heated by the gas flame Thermocouple is held 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 manually opened by pressing, whereby u.a. a magnetic circuit is closed. A thermocouple powers the solenoid with electricity. This thermocouple is to be monitored by the Heated gas flame. After the flame a few seconds the Thermocouple has heated, is the thermo-current of the thermocouple high enough to close the magnetic circuit hold and hold the gas valve in the open position. goes out the flame by overcooking food, wind or the like, the thermo-current of the thermocouple decreases and the Valve drops or closes automatically and remains also 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 Gasflamme 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 you want to realize a timer function, then there is a known possibility therein, the thermo-current of the thermocouple via a relay. To switch off the gas flame the thermal current is opened by opening the relay contact interrupted and the gas valve closes. A disadvantage of this known arrangement, the additional contact resistance and residual stresses, which in the thermal circuit through the wiring and the timer are brought. These "Loss voltages" must be due to a higher thermoelectric voltage be compensated, but only after a long heat-up is reached. As a result, the valve longer manually held in the open position, what makes the system less attractive for everyday use. In addition, the reliability of the system suffers Dirt on the relay contacts. Prevent contamination also the permanent keeping open of the valve.

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 the electrically controlled switching off of the gas flame to create a combustion station without a relay or without mechanically moving parts.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass eine Schalteinrichtung zum Einspeisen eines ein abfallendes Magnetventils in die Schließstellung bewirkenden Kompensationsstroms in den Thermostromkreis der mit dem Thermoelement verbundenen Magnetspule vorgesehen ist.This object is achieved in that a Switching device for feeding a sloping solenoid valve in the closed position causing compensation current in the thermal circuit of the thermocouple connected Magnet coil is provided.

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 erfindungsgemäße 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 in that the sensitive thermostatic circuit turns off is not interrupted and that no too dirty tilting mechanically movable parts are required. at the inventive solution of a shutdown by means of a Compensation current becomes technically and electrically uncritical Parallel connection to the thermocircle near the Solenoid valve created.

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

In vorteilhafter Weise 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.Advantageously, a compensating current delivering Storage capacitor provided. Because the compensation current only has to flow during the fraction of a second, to drop the magnetic circuit forms a capacitor a cost-effective and much simpler solution, for example opposite a power supply.

Der Speicherkondensator ist über die Schalteinrichtung mit dem Thermostromkreis verbunden und kann auch bei mehreren Thermostromkreisen über mehrere Schalteinrichtungen mit einer entsprechenden Zahl von Thermostromkreisen verbunden sein.The storage capacitor is via the switching device with connected to the thermal circuit and can also be used at several Thermostromkreisreisen over several switching devices with a corresponding number of Thermostromkreisen be connected.

Der Speicherkondensator ist zweckmäßigerweise mit einer Ladeeinrichtung, insbesondere einem Ladewiderstand verbunden sein, der dafür sorgt, dass der Speicherkondensator ständig geladen ist.The storage capacitor is expediently with a charging device, in particular connected to a charging resistor be who ensures that the storage capacitor constantly loaded.

Die Schalteinrichtung ist vorzugsweise als elektrisch steuerbarer Schalter, insbesondere Halbleiterschalter ausgebildet.The switching device is preferably as electrically controllable Switch, in particular semiconductor switch formed.

In vorteilhafter Weise ist die Schalteinrichtung durch eine Zeitschaltuhr steuerbar, um Abschaltzeiten programmieren zu können. Diese Zeitschaltuhr kann bei Bedarf mehrere voneinander unabhängige Zeitprogramme zum Schalten mehrerer Schalteinrichtungen für mehrere Brennstellen aufweisen.Advantageously, the switching device is characterized by a Timer can be controlled to program shutdown times can. This timer can be several if necessary independent time programs for switching a plurality of switching devices have for several burners.

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 be a safety device for Switching off all gas flames after a predefinable maximum time for example, have 3 hours. Time will be there chosen so that it is longer than a typical burning time, for example, a gas stove. After expiration of Safety time all gas flames are shut down for safety's sake.

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 affordable Design has the timer one of the number number of time presets corresponding to the number of burners and a common time reset button. This will be the Number of controls limited to the bare 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 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 compensation 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 embodiment shown in Figures 1 and 2 a thermal circuit 10 consists of a thermocouple 11, which is connected to the solenoid coil 12 of a solenoid valve 13 is. A combustible gas leading gas line 14 leads to a focal point 15, for example, the focal point of a Stove or a baking oven. The solenoid valve 13 is in the Gas line 14 connected, wherein a valve member 16 for shutting off and opening the gas line 14 is provided.

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 is at rest Valve member 16 by means of a manual actuator 17 pressed into the open position, so that gas to Burner 15 can flow. This is done by means of a lighter ignited, so that a gas flame 18 is formed. These Gas flame 18 heats the in a correspondingly close spatial arrangement attached thermocouple 11, so this one Thermostom generated by the solenoid coil 12 of the solenoid valve 13 flows. This thermo-current becomes the solenoid valve 13 and the valve member 16 held in the open position, so that the manual actuator 17 is now released can be. Does the gas flame 18 by any Actions, the thermocouple 11 cools down, and the decreasing thermal current, the valve member 16 stop holding in its open position, so this in the closed position falls back and the further gas supply locks. This drop can by means of a not shown Spring and / or caused 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 with Help of a charging resistor 21 constantly in the charged state is held. This capacitor 20 is connected via a Switch 22, for example, a semiconductor switch, parallel connected to the thermocouple 11 and to the solenoid coil 12. The switch 22 can via a non-illustrated Time circuit are closed, with off times Ta are programmable. If a switch-off time Ta is reached, so closes the switch 22, causing a temporary compensation current is taken from the capacitor, which in the Thermostromkreis 10 is fed so that it the thermo-current counteracts. As a result, the solenoid valve 13 drops and the valve member 16 closes the gas line 14. Nach subsequently opened switch 22 is the thermo-current of the thermocouple 11 is no longer capable of the solenoid valve 13 to open.

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 via another, also timed Switch 23 with a further thermal circuit 24th connected, which is not shown in detail in Figure 1, but only in Figure 2. This again consists from a thermocouple 25 and the solenoid 26 of a Remaining non-illustrated solenoid valve in the gas line for another, also not shown focal point.

Entsprechend können an den Kondensator 20 noch weitere Thermostromkreise für weitere Brennstellen angeschlossen werden, wobei die Magnetventile dennoch im Sekundenbereich nacheinander abgeschaltet werden können. Accordingly, to the capacitor 20 even more Thermostromkreise be connected for more firing points, wherein the solenoid valves still in seconds range in succession can be turned off.

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 Figure 2, the timer 19 is shown in the outer view. It has next to a display 27 for playback the time and the shutdown times to be set five Timing buttons 28 to 32 for setting the desired Shutdown times for five burners or five thermo circuits and a common time reset button 33, which is for Correction of the shutdown time to be set forwards by a the time presentation keys 28 to 32 is used. Of course one could also provide several time reset buttons 33 or the time adjustment is made according to one of several known Methods for setting switching times.

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.There is still a safety shutdown in the timer provided, by the after burning periods, over 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 by means of an additional timer, by the After the safety time all switches 22, 23 closed become. As the timing usually in a microcontroller 34 takes its program only needs this Shutdown time included, after expiration of their respective Control outputs all switches 22, 23 are closed.

Claims (9)

Vorrichtung zum elektrisch gesteuerten Abschalten der Gasflamme einer Brennstelle, der über ein Magnetventil brennbares Gas zuführbar ist, wobei die Magnetspule des Magnetventils von einem Thermoelement gespeist wird und das Magnetventil bei durch die Gasflamme erhitztem Thermoelement in der Offenstellung gehalten wird, dadurch gekennzeichnet, dass eine Schalteinrichtung (22, 23) zum Einspeisen eines ein Abfallen des Magnetventils (13) in die Schließstellung bewirkenden Kompensationsstroms in den Thermostromkreis (10, 24) der mit dem Thermoelement (11, 25) verbundenen Magnetspule (12, 26) vorgesehen ist.Device for electrically controlled switching off the gas flame of a combustion chamber, which is supplied via a magnetic valve combustible gas, wherein the magnetic coil of the solenoid valve is powered by a thermocouple and the solenoid valve is held in heated by the gas flame thermocouple in the open position, characterized in that a switching device (22, 23) for feeding a compensating current causing the solenoid valve (13) to fall into the closed position into the thermal circuit (10, 24) of the magnetic coil (12, 26) connected to the thermocouple (11, 25). Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass ein den Kompensationsstrom liefernder Speicherkondensator (20) vorgesehen ist.Device according to claim 1, characterized in that a storage capacitor (20) delivering the compensation current is provided. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass der Speicherkondensator (20) über die Schalteinrichtung (22, 23) mit dem Thermostromkreis (10, 24) oder über mehrere Schalteinrichtungen mit einer entsprechenden Zahl von Thermostromkreisen verbunden ist.Apparatus according to claim 2, characterized in that the storage capacitor (20) via the switching means (22, 23) to the thermostatic circuit (10, 24) or via a plurality of switching devices is connected to a corresponding number of Thermostromkreisen. Vorrichtung nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass der Speicherkondensator (20) mit einer Ladeeinrichtung (21), insbesondere einem Ladewiderstand verbunden ist. Apparatus according to claim 2 or 3, characterized in that the storage capacitor (20) is connected to a charging device (21), in particular a charging resistor. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Schalteinrichtung (22, 23) als elektrisch steuerbarer Schalter, insbesondere Halbleiterschalter ausgebildet ist.Device according to one of the preceding claims, characterized in that the switching device (22, 23) is designed as an electrically controllable switch, in particular semiconductor switch. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die Schalteinrichtung (22, 23) durch eine Zeitsteuereinheit (34) steuerbar ist.Apparatus according to claim 5, characterized in that the switching device (22, 23) by a timing unit (34) is controllable. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass die Zeitsteuereinheit mehrere voneinander unabhängige Zeitprogramme zum Schalten mehrerer Schalteinrichtungen (22, 23) für mehrere Brennstellen (15) aufweisen.Apparatus according to claim 6, characterized in that the time control unit has a plurality of independent time programs for switching a plurality of switching devices (22, 23) for a plurality of burners (15). Vorrichtung nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass die Zeitsteuereinheit (34) eine Sicherheitseinrichtung zur Ausschaltung aller Gasflammen (18) nach einer vorgebbaren Maximalzeit besitzt.Apparatus according to claim 6 or 7, characterized in that the time control unit (34) has a safety device for switching off all gas flames (18) after a predeterminable maximum time. Vorrichtung nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, dass die die Zeitsteuereinheit (34) enthaltende Zeitschaltuhr (19) einer der Zahl der Brennstellen entsprechende Zahl von Zeitvorstelltasten (28 bis 32) und eine gemeinsame Zeitrückstelltaste (33) besitzt.Device according to one of claims 6 to 8, characterized in that the timer (19) containing the time control unit (34) has a number of time display keys (28 to 32) corresponding to the number of the burners and a common time reset 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 true EP1505344A2 (en) 2005-02-09
EP1505344A3 EP1505344A3 (en) 2010-06-02
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IT201700017422A1 (en) * 2017-02-16 2018-08-16 Vanni Gallocchio SAFETY DEVICE FOR GAS BURNERS OF STOVES, KITCHENS AND COOKTOPS IN GENERAL

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JPS62293016A (en) 1986-06-11 1987-12-19 Matsushita Electric Ind Co Ltd Gas appliance with time limit device
EP1113227A2 (en) 1999-12-16 2001-07-04 Whirlpool Corporation Device for obtaining rapid ignition of a cooking hob gas burner fed via a gas pipe provided with a solenoid safety valve

Cited By (3)

* 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
WO2018150349A1 (en) * 2017-02-16 2018-08-23 Fioranzato Diego Safety device for gas burners of stoves, cookers and hobs in general

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Publication number Publication date
EP1505344B1 (en) 2014-04-30
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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