EP1657492B1 - Gas cooking top with a gasvalve - Google Patents

Gas cooking top with a gasvalve Download PDF

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Publication number
EP1657492B1
EP1657492B1 EP05110103A EP05110103A EP1657492B1 EP 1657492 B1 EP1657492 B1 EP 1657492B1 EP 05110103 A EP05110103 A EP 05110103A EP 05110103 A EP05110103 A EP 05110103A EP 1657492 B1 EP1657492 B1 EP 1657492B1
Authority
EP
European Patent Office
Prior art keywords
gas
control device
cock
hob according
cooker hob
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.)
Not-in-force
Application number
EP05110103A
Other languages
German (de)
French (fr)
Other versions
EP1657492A3 (en
EP1657492A2 (en
Inventor
Pedro Herrera Estrada
Jose Leon Garcia
Rogerio Nabarretti
Luis Antonio Palacios Valdueza
Emilio Placer Maruri
Julio Rubio Abad
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete 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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP1657492A2 publication Critical patent/EP1657492A2/en
Publication of EP1657492A3 publication Critical patent/EP1657492A3/en
Application granted granted Critical
Publication of EP1657492B1 publication Critical patent/EP1657492B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/022—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGESĀ ; 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
    • 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
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/12—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods
    • F23N5/123—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/36—Spark ignition, e.g. by means of a high voltage
    • 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
    • F23N2235/14—Fuel valves electromagnetically operated

Definitions

  • the invention relates to a gas hob with a gas tap according to the preamble of claim 1
  • a generic device for securing a gas burner has an electromagnet (magnetic insert) arranged in a gas tap. Its necessary holding current for opening the solenoid valve during gas combustion is transmitted by an electronic control device to the electromagnet.
  • the control device is associated with a microswitch or a position sensor which detects a pressure actuation of a tap axis of the gas tap. If the tap axis is pressed once at the beginning of a gas hob operation, the pressure actuation of the tap axis is detected by the microswitch, which sends an opening signal to the control device. By means of the depressed cock axis, a valve stem of the magnetic insert is brought into its open position.
  • the control device supplies the magnetic insert with a holding current in response to the opening signal of the position sensor and controls an ignition electrode for flame ignition at the gas burner accordingly.
  • the from the DE 198 25 846 A1 known position sensors are mounted in the region of a control panel on an outer side of the gas tap and thus very prone to failure.
  • Subject of the EP 0 581 391 A1 is an electronic control system for adjusting a gas flow for a gas consumer, eg for a gas-powered internal combustion engine.
  • an electromagnetically infinitely adjustable gas valve is electronically controlled.
  • the gas valve includes a position sensor whose output is linearly proportional to the position of a spool of the gas valve.
  • thermoelectrically controlled semi-automatic safety valve for two or more burners of a household gas appliance known.
  • This safety valve includes an electrical switch for controlling the firing heads of the burners.
  • the electrical switch is arranged in a protective housing. In the rest position, an actuator presses against the electrical switch and keeps it open. In the ignition position in which the gas path is open, the actuator is moved away from the electrical switch by an electromagnetically generated force, whereupon the electrical switch closes (see. FIGS. 2 to 4 of the US Pat. No. 3,157,222 ).
  • the object of the present invention is a generic. To provide gas hob with such a gas tap, in which a reliable operation is permanently enabled.
  • the object of the invention is achieved by a gas hob with the features of claim 1.
  • the position sensor is formed within a housing of the solenoid valve. The position switch is thus largely protected from external influences.
  • the position sensor detects an opening position of the electromagnetic valve and generates a corresponding opening signal.
  • the position sensors detect according to the DE 198 25 846 A1 not the opening position of the solenoid valve. Rather, according to the DE 198 25 846 A1 an actuation of the tap axis of the gas tap, for example, detects a pressure actuation.
  • the position sensor is designed as an electrical switch for closing a signal line leading to the control device.
  • the electrical switch can be brought by actuation of the solenoid valve in its closed position. In the closed position, the signal line leading to the control device is closed so that the control device can detect a signal current.
  • the electric switch is formed by the valve stem of the electromagnetic valve.
  • the valve stem of the solenoid valve may be in its open position with a terminal end of the signal line in contact. In this state, the valve stem closes the signal line so that a signal current can flow to the electric control device.
  • the solenoid valve is designed in the sense of a component reduction within the gas tap.
  • the solenoid valve by means of a cock axis are brought into an open position in which a gas path is opened to the gas burner.
  • control device can be assigned an ignition electrode for flame ignition at the gas burner.
  • the controller in response to an opening signal of the position sensor, the controller may drive the ignition electrode for flame ignition.
  • the solenoid valve may have a so-called magnetic insert, which is mountable in the gas tap.
  • the magnetic insert has a housing in which a valve stem is guided displaceably.
  • the valve stem can be held in its open position by means of an electromagnetically generated holding force.
  • the terminal end of the electrical switch formed within the solenoid valve housing may be disposed between two counter-anchors of solenoid valve coils. In this way, the terminal end of the electrical switch is protected against external influences, such as shocks.
  • the electrical switch can close a signal circuit of the control device by a pressure actuation.
  • a signal flow from the electrical control device to the terminal end of the electrical switch to the valve stem of the solenoid valve via a first ground terminal of the valve stem to a second ground terminal of the control device flow back to the control device.
  • the at least one solenoid valve coil can be integrated in the signal circuit.
  • the at least one electromagnetic coil can exert a magnetic holding force on the valve stem. The valve stem is thus held by the magnetic holding force in its open position.
  • FIG. 1 is shown in a schematic representation of a gas hob with a gas burner 1 according to the first embodiment.
  • a gas tap 7 is arranged for gas flow control.
  • the gas tap 7 has a tap axis 9, which can be actuated via an actuating knob 11.
  • an electromagnetic safety valve 13 is integrated, which interrupts a gas path 15 within the gas tap in its de-energized state.
  • the solenoid valve 13 has a magnetic insert 17 which is inserted into a corresponding receiving opening 19 of the gas tap.
  • a valve stem 23 is slidably guided with its armature 25.
  • the valve stem 23 has a valve plate 27.
  • the valve plate 27 is pressed by means of a return spring 29 into contact with a valve seat 31.
  • the gas path 15 is interrupted within the gas tap 7.
  • the magnetic insert 17 of the solenoid valve 13 is connected via a first signal line 33 to an electrical control device 35 in connection.
  • the electrical control device 35 is connected to an ignition electrode 37 for flame ignition at the gas burner 1 in connection.
  • valve stem 23 is electrically grounded via a first ground terminal 41.
  • the control device 35 is electrically grounded via a second ground terminal 43, while the gas burner is earthed via a third ground terminal 45.
  • the control device 35 is supplied with power via mains connections 47.
  • the rotary knob 11 of the gas tap 7 is to be pressed in the direction of arrow I.
  • the valve shaft 9 moves the valve stem 23 of the magnetic insert 17 in an open position.
  • the leading through the gas valve 7 gas path 15 is opened.
  • the armature 25 of the valve stem 23 is in contact with the two counter-anchors 51 for the solenoid coils 53.
  • the counter-anchors 51 are arranged inside the magnet insert housing 21.
  • the magnetic insert 17 of the solenoid valve is shown in an enlarged view.
  • the valve stem 23 as in the FIG. 1 , shown in its closed position.
  • the control device 35 is connected via the signal line 33 in series with the first solenoid valve coils 55 and the second solenoid coil 57.
  • a terminal end 59 of the solenoid coil 57 is between the two Counter anchors 51 arranged.
  • the connection end 59 extends in a gap 61 between the two counter-anchors 51 in the direction of the armature 25 of the valve stem 23.
  • the armature 25 of the valve stem 23 serves as an electrical switch which closes a signal circuit S in contact with the terminal end 59.
  • the electrical control device 35 In the signal circuit S are in series, the electrical control device 35, the first and second solenoid coil 55, 57, the connection end 59th of the valve stem 25 with its armature 25 is connected.
  • the valve stem 23 is in electrical connection with the control device 35, which is also earthed via the second grounding connection 43, via the first earth connection 41 of the gas tap.
  • the second embodiment of the invention is shown. Consequently, the electrical control device via the signal line 33 directly to the terminal end 59 in electrical connection.
  • the two solenoid valve coils 55, 57 are not interposed in the signal circuit S.
  • the gas burner 1 is assigned a thermocouple 63 for flame detection.
  • the thermocouple 63 is connected in a thermal power circuit T, in series with the first solenoid valve coil and the second solenoid valve coil.
  • thermocouple 63 In burner operation, the thermocouple 63 is heated by the flames and thereby generates a thermal current. By the thermal current of the thermal circuit T, a magnetic holding force is generated in the solenoid valve coils 55, 57, which holds the armature 25 of the valve stem 23 in its open position.
  • the ignition electrode 37 is formed such that it can monitor extinction of the gas flame at the burner. In the case of extinction of the gas flame at the burner 1, a corresponding drop in temperature at the ignition electrode 37 is detected forwarded to the control device. In response to the detected signal, the electronic controller drives the ignition electrode 37 to cause re-ignition of the flame. Should this not occur within a predetermined time interval or after a number of predetermined sparks against ignition of the gas, the electrical control device interrupts the signal circuit. Characterized the magnetic holding force of the solenoid coils 55, 57 is interrupted, whereby the valve stem is returned to its closed position.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Magnetically Actuated Valves (AREA)

Description

Die Erfindung betrifft ein Gaskochfeld mit einem Gashahn nach dem Oberbegriff des Anspruchs 1The invention relates to a gas hob with a gas tap according to the preamble of claim 1

Aus DE 198 25 846 A1 ist eine gattungsgemƤƟe Vorrichtung zum Sichern einer Gasbrennstelle bekannt. Die Vorrichtung weist einen in einem Gashahn angeordneten Elektromagneten (Magneteinsatz) auf. Dessen notwendiger Haltestrom zur Ɩffnung des Elektromagnetventils wƤhrend einer Gasverbrennung wird durch eine elektronische Steuereinrichtung auf den Elektromagneten Ć¼bertragen. Der Steuereinrichtung ist ein Mikroschalter bzw. ein Positionssensor zugeordnet, der eine DruckbetƤtigung einer Hahnachse des Gashahnes erfasst. Wird zu Beginn eines Gaskochfeldbetriebes die Hahnachse einmalig gedrĆ¼ckt, so wird die DruckbetƤtigung der Hahnachse durch den Mikroschalter erfasst, der ein Ɩffnungssignal zu der Steuerungseinrichtung leitet. Mittels der eingedrĆ¼ckten Hahnachse wird ein VentilstĆ¶ĆŸel des Magneteinsatzes in seine Ɩffnungsstellung gebracht. Die Steuerungseinrichtung versorgt in Antwort auf das Ɩffnungssignal des Positionssensors den Magneteinsatz mit einem Haltestrom und steuert eine ZĆ¼ndelektrode zur FlammenentzĆ¼ndung am Gasbrenner entsprechend an. Die aus der DE 198 25 846 A1 bekannten Positionssensoren sind im Bereich einer Bedienblende an einer AuƟenseite des Gashahnes gehaltert und somit sehr stƶrungsanfƤllig.Out DE 198 25 846 A1 a generic device for securing a gas burner is known. The device has an electromagnet (magnetic insert) arranged in a gas tap. Its necessary holding current for opening the solenoid valve during gas combustion is transmitted by an electronic control device to the electromagnet. The control device is associated with a microswitch or a position sensor which detects a pressure actuation of a tap axis of the gas tap. If the tap axis is pressed once at the beginning of a gas hob operation, the pressure actuation of the tap axis is detected by the microswitch, which sends an opening signal to the control device. By means of the depressed cock axis, a valve stem of the magnetic insert is brought into its open position. The control device supplies the magnetic insert with a holding current in response to the opening signal of the position sensor and controls an ignition electrode for flame ignition at the gas burner accordingly. The from the DE 198 25 846 A1 known position sensors are mounted in the region of a control panel on an outer side of the gas tap and thus very prone to failure.

Gegenstand der EP 0 581 391 A1 ist ein elektronisches Regelungssystem zum Einstellen eines Gasstroms fĆ¼r einen Gasverbraucher, z.B. fĆ¼r einen gasbetriebenen Verbrennungsmotor. Hierbei wird ein elektromagnetisch stufenlos einstellbares Gasventil elektronisch angesteuert. Das Gasventil umfasst einen Positionssensor, dessen Ausgangssignal linear proportional zu der Position eines Schiebers des Gasventils ist.Subject of the EP 0 581 391 A1 is an electronic control system for adjusting a gas flow for a gas consumer, eg for a gas-powered internal combustion engine. Here, an electromagnetically infinitely adjustable gas valve is electronically controlled. The gas valve includes a position sensor whose output is linearly proportional to the position of a spool of the gas valve.

Aus der Druckschrift US 3 157 222 A ist ein thermoelektrisch gesteuertes halbautomatisches Sicherheitsventil fĆ¼r zwei oder mehr Brennstellen eines Haushalts-GasgerƤtes bekannt. Dieses Sicherheitsventil umfasst einen elektrischen Schalter zum Ansteuern der ZĆ¼ndkƶpfe der Brennstellen. Zum Schutz vor ƤuƟeren EinflĆ¼ssen ist der elektrische Schalter in einem SchutzgehƤuse angeordnet. In der Ruhestellung drĆ¼ckt ein Stellglied gegen den elektrischen Schalter und hƤlt diesen offen. In der ZĆ¼ndstellung, in der der Gasweg geƶffnet ist, wird das Stellglied durch eine elektromagnetisch erzeugte Kraft vom elektrischen Schalter weg bewegt, woraufhin sich der elektrische Schalter schlieƟt (vgl. Figuren 2 bis 4 der US 3 157 222 A ).From the publication US Pat. No. 3,157,222 is a thermoelectrically controlled semi-automatic safety valve for two or more burners of a household gas appliance known. This safety valve includes an electrical switch for controlling the firing heads of the burners. For protection against external influences, the electrical switch is arranged in a protective housing. In the rest position, an actuator presses against the electrical switch and keeps it open. In the ignition position in which the gas path is open, the actuator is moved away from the electrical switch by an electromagnetically generated force, whereupon the electrical switch closes (see. FIGS. 2 to 4 of the US Pat. No. 3,157,222 ).

Aus der Druckschrift EP 0 964 326 A1 ist ein Gaskochfeld mit einem Gashahn bekannt. Dieses Gaskochfeld wird als nƤchstliegender Stand der Technik angesehen.From the publication EP 0 964 326 A1 is a gas hob with a gas tap known. This gas hob is considered to be the closest prior art.

Die Aufgabe der vorliegenden Erfindung besteht darin, ein gattungsgemƤƟes . Gaskochfeld mit einem solchen Gashahn bereitzustellen, bei welchen dauerhaft ein zuverlƤssiger Betrieb ermƶglicht ist.The object of the present invention is a generic. To provide gas hob with such a gas tap, in which a reliable operation is permanently enabled.

Die Aufgabe der Erfindung ist durch ein Gaskochfeld mit den Merkmalen des Patentanspruchs 1 gelƶst. GemƤƟ dem kennzeichnenden Teil des Patentanspruchs 1 ist der Positionssensor innerhalb eines GehƤuses des Elektromagnetventils ausgebildet. Der Positionsschalter ist somit gegenĆ¼ber ƤuƟeren EinflĆ¼ssen weitgehend geschĆ¼tzt.The object of the invention is achieved by a gas hob with the features of claim 1. According to the characterizing part of claim 1, the position sensor is formed within a housing of the solenoid valve. The position switch is thus largely protected from external influences.

GemƤƟ der vorliegenden Erfindung erfasst der Positionssensor eine Ɩffnungsstellung des Elektromagnetventils und erzeugt ein entsprechendes Ɩffnungssignal. Im Gegensatz dazu erfassen die Positionssensoren gemƤƟ der DE 198 25 846 A1 nicht die Ɩffnungsstellung des Elektromagnetventils. Vielmehr wird gemƤƟ der DE 198 25 846 A1 eine BetƤtigung der Hahnachse des Gashahns, beispielsweise eine DruckbetƤtigung erfasst.According to the present invention, the position sensor detects an opening position of the electromagnetic valve and generates a corresponding opening signal. In contrast, the position sensors detect according to the DE 198 25 846 A1 not the opening position of the solenoid valve. Rather, according to the DE 198 25 846 A1 an actuation of the tap axis of the gas tap, for example, detects a pressure actuation.

Der Positionssensor ist erfindungsgemƤƟ als ein elektrischer Schalter zum SchlieƟen einer zu der Steuereinrichtung fĆ¼hrenden Signalleitung ausgebildet. Der elektrische Schalter kann durch BetƤtigung des Elektromagnetventils in seine SchlieƟstellung gebracht werden. In der SchlieƟstellung ist die zu der Steuereinrichtung fĆ¼hrende Signalleitung geschlossen, so dass die Steuereinrichtung einen Signalstrom erfassen kann.According to the invention, the position sensor is designed as an electrical switch for closing a signal line leading to the control device. The electrical switch can be brought by actuation of the solenoid valve in its closed position. In the closed position, the signal line leading to the control device is closed so that the control device can detect a signal current.

GemƤƟ der vorliegenden Erfindung ist der elektrische Schalter durch den Ventilstƶssel des Elektromagnetventils ausgebildet. Der Ventilstƶssel des Elektromagnetventils kann in seiner Ɩffnungsposition sich mit einem Anschlussende der Signalleitung in Kontakt befinden. In diesem Zustand schlieƟt der Ventilstƶssel die Signalleitung, so dass ein Signalstrom zu der elektrischen Steuereinrichtung flieƟen kann.According to the present invention, the electric switch is formed by the valve stem of the electromagnetic valve. The valve stem of the solenoid valve may be in its open position with a terminal end of the signal line in contact. In this state, the valve stem closes the signal line so that a signal current can flow to the electric control device.

Es ist vorteilhaft wenn das Elektromagnetventil im Sinne einer Bauteilreduzierung innerhalb des Gashahnes ausgebildet ist. In diesem Fall kann das Elektromagnetventil mittels einer Hahnachse in eine Ɩffnungsstellung gebracht werden, in der ein Gasweg zu dem Gasbrenner geƶffnet ist.It is advantageous if the solenoid valve is designed in the sense of a component reduction within the gas tap. In this case, the solenoid valve by means of a cock axis are brought into an open position in which a gas path is opened to the gas burner.

Verteilhaft kann der Steuereinrichtung eine ZĆ¼ndelektrode zur FlammenentzĆ¼ndung am Gasbrenner zugeordnet sein. In diesem Fall kann die Steuereinrichtung in Antwort auf ein Ɩffnungssignal des Positionssensors die ZĆ¼ndelektrode zur FlammenentzĆ¼ndung ansteuern.Distributively, the control device can be assigned an ignition electrode for flame ignition at the gas burner. In this case, in response to an opening signal of the position sensor, the controller may drive the ignition electrode for flame ignition.

Im Falle, dass das Elektromagnetventil im Gashahn ausgebildet ist, kann das Elektromagnetventil einen sogenannten Magneteinsatz aufweisen, der in den Gashahn montierbar ist. Der Magneteinsatz weist ein GehƤuse auf, in dem ein Ventilstƶssel verschiebbar gefĆ¼hrt ist. Der Ventilstƶssel kann mittels einer elektromagnetisch erzeugten Haltekraft in seiner Ɩffnungsposition gehalten werden.In the case that the solenoid valve is formed in the gas cock, the solenoid valve may have a so-called magnetic insert, which is mountable in the gas tap. The magnetic insert has a housing in which a valve stem is guided displaceably. The valve stem can be held in its open position by means of an electromagnetically generated holding force.

Bevorzugt kann das innerhalb des Elektromagnetventils-GehƤuses ausgebildete Anschlussende des elektrischen Schalters zwischen zwei Gegenankern von Elektromagnetventilspulen angeordnet sein. Auf diese Weise ist das Anschlussende des elektrischen Schalters sicher gegen ƤuƟere EinflĆ¼sse, beispielsweise StĆ¶ĆŸe, geschĆ¼tzt.Preferably, the terminal end of the electrical switch formed within the solenoid valve housing may be disposed between two counter-anchors of solenoid valve coils. In this way, the terminal end of the electrical switch is protected against external influences, such as shocks.

Der elektrische Schalter kann durch eine DruckbetƤtigung einen Signalstromkreis der Steuereinrichtung schlieƟen. In dem Signalstromkreis kann ein Signalstrom von der elektrischen Steuereinrichtung zu dem Anschlussende des elektrischen Schalters zu dem Ventilstƶssel des Elektromagnetventils Ć¼ber einen ersten Erdungsanschluss des Ventilstƶssels zu einem zweiten Erdungsanschluss der Steuereinrichtung wieder zurĆ¼ck zu der Steuereinrichtung flieƟen.The electrical switch can close a signal circuit of the control device by a pressure actuation. In the signal circuit, a signal flow from the electrical control device to the terminal end of the electrical switch to the valve stem of the solenoid valve via a first ground terminal of the valve stem to a second ground terminal of the control device flow back to the control device.

ZusƤtzlich kann in dem Signalstromkreis die zumindest eine Elektromagnetventilspule integriert sein. In diesem Fall kann bei geschlossenem elektrischem Schalter die zumindest eine Elektromagnetspule eine magnetische Haltekraft auf den Ventilstƶssel ausĆ¼ben. Der Ventilstƶssel ist somit durch die magnetische Haltekraft in seiner Ɩffnungsposition gehalten.In addition, the at least one solenoid valve coil can be integrated in the signal circuit. In this case, when the electric switch is closed, the at least one electromagnetic coil can exert a magnetic holding force on the valve stem. The valve stem is thus held by the magnetic holding force in its open position.

Nachfolgend sind zwei AusfĆ¼hrungsbeispiele der Erfindung anhand der beigefĆ¼gten Figuren beschrieben:

  • Figur 1 eine schematische Darstellung eines Gaskochfelds mit einem Gasbrenner sowie einem zugeordneten Gashahn;
  • Figur 2 in einer vergrĆ¶ĆŸerten Ansicht einen Magneteinsatz des Elektromagnetventils mit zugeordneter Steuereinrichtung sowie Gasbrenner;
  • Figur 3 entsprechend der Figur 2 den Magneteinsatz mit seinem Ventilstƶssel in einer Ɩffnungsposition; und
  • Figur 4 gemƤƟ dem zweiten AusfĆ¼hrungsbeispiel einen Magneteinsatz mit zugeordnetem Brenner sowie zugeordneter Steuereinrichtung.
Two exemplary embodiments of the invention are described below with reference to the attached figures:
  • FIG. 1 a schematic representation of a gas hob with a gas burner and an associated gas tap;
  • FIG. 2 in an enlarged view a magnetic insert of the solenoid valve with associated control device and gas burner;
  • FIG. 3 according to the FIG. 2 the magnetic insert with its valve stem in an open position; and
  • FIG. 4 according to the second embodiment, a magnetic insert with associated burner and associated control device.

In der Figur 1 ist gemƤƟ dem ersten AusfĆ¼hrungsbeispiel in einer schematischen Darstellung ein Gaskochfeld mit einem Gasbrenner 1 gezeigt. In einer Gasleitung 3 zu dem Gasbrenner 1 ist ein Gashahn 7 zur Gasmengenregelung angeordnet. Der Gashahn 7 weist eine Hahnachse 9 auf, die Ć¼ber einen BetƤtigungsknebel 11 betƤtigt werden kann. Weiterhin ist in dem Gashahn ein elektromagnetisches Sicherheitsventil 13 integriert, das in seinem stromlosen Zustand einen Gasweg 15 innerhalb des Gashahnes unterbricht.In the FIG. 1 is shown in a schematic representation of a gas hob with a gas burner 1 according to the first embodiment. In a gas line 3 to the gas burner 1, a gas tap 7 is arranged for gas flow control. The gas tap 7 has a tap axis 9, which can be actuated via an actuating knob 11. Furthermore, in the gas valve, an electromagnetic safety valve 13 is integrated, which interrupts a gas path 15 within the gas tap in its de-energized state.

Das Elektromagnetventil 13 weist einen Magneteinsatz 17 auf, der in eine entsprechende Aufnahmeƶffnung 19 des Gashahnes eingesetzt ist. In einem GehƤuse 21 des Magneteinsatzes 17 ist ein Ventilstƶssel 23 mit seinem Magnetanker 25 verschiebbar gefĆ¼hrt. An seinem ƤuƟeren Ende weist der Ventilstƶssel 23 einen Ventilteller 27 auf. In der Figur 1 ist der Ventilteller 27 mittels einer RĆ¼ckstellfeder 29 in Anlage mit einem Ventilsitz 31 gedrĆ¼ckt. Dadurch ist der Gasweg 15 innerhalb des Gashahnes 7 unterbrochen.The solenoid valve 13 has a magnetic insert 17 which is inserted into a corresponding receiving opening 19 of the gas tap. In a housing 21 of the magnetic insert 17, a valve stem 23 is slidably guided with its armature 25. At its outer end, the valve stem 23 has a valve plate 27. In the FIG. 1 the valve plate 27 is pressed by means of a return spring 29 into contact with a valve seat 31. As a result, the gas path 15 is interrupted within the gas tap 7.

Der Magneteinsatz 17 des Elektromagnetventils 13 ist Ć¼ber eine erste Signalleitung 33 mit einer elektrischen Steuereinrichtung 35 in Verbindung. Die elektrische Steuereinrichtung 35 ist mit einer ZĆ¼ndelektrode 37 zur FlammenentzĆ¼ndung an dem Gasbrenner 1 in Verbindung.The magnetic insert 17 of the solenoid valve 13 is connected via a first signal line 33 to an electrical control device 35 in connection. The electrical control device 35 is connected to an ignition electrode 37 for flame ignition at the gas burner 1 in connection.

In der Figur 1 ist der Ventilstƶssel 23 Ć¼ber einen ersten Erdungsanschluss 41 elektrisch geerdet. Die Steuereinrichtung 35 ist Ć¼ber einen zweiten Erdungsanschluss 43 elektrisch geerdet, wƤhrend der Gasbrenner Ć¼ber einen dritten Erdungsanschluss 45 geerdet ist. Die Steuereinrichtung 35 wird Ć¼ber NetzanschlĆ¼sse 47 mit Spannung versorgt.In the FIG. 1 the valve stem 23 is electrically grounded via a first ground terminal 41. The control device 35 is electrically grounded via a second ground terminal 43, while the gas burner is earthed via a third ground terminal 45. The control device 35 is supplied with power via mains connections 47.

Zur Inbetriebnahme des Gasbrenners 1 ist der Drehknebel 11 des Gashahnes 7 in Pfeilrichtung I zu drĆ¼cken. Durch die DruckbetƤtigung verschiebt die Hahnachse 9 den Ventilstƶssel 23 des Magneteinsatzes 17 in eine Ɩffnungsstellung. In der Ɩffnungsstellung des Ventilstƶssels 23 ist der durch den Gashahn 7 fĆ¼hrende Gasweg 15 geƶffnet. Gleichzeitig ist bei geƶffnetem Ventilstƶssel 23 der Magnetanker 25 des Ventilstƶssels 23 in Kontakt mit den beiden Gegenankern 51 fĆ¼r die Elektromagnet-Spulen 53. Die Gegenanker 51 sind innerhalb des Magneteinsatz-GehƤuses 21 angeordnet.To start up the gas burner 1, the rotary knob 11 of the gas tap 7 is to be pressed in the direction of arrow I. By the pressure actuation, the valve shaft 9 moves the valve stem 23 of the magnetic insert 17 in an open position. In the open position of the valve stem 23, the leading through the gas valve 7 gas path 15 is opened. At the same time, with the valve tappet 23 open, the armature 25 of the valve stem 23 is in contact with the two counter-anchors 51 for the solenoid coils 53. The counter-anchors 51 are arranged inside the magnet insert housing 21.

In den Figuren 2 und 3 ist der Magneteinsatz 17 des Elektromagnetventils in vergrĆ¶ĆŸerter Ansicht dargestellt. In der Figur 2 ist der Ventilstƶssel 23, wie in der Figur 1, in seiner SchlieƟstellung gezeigt. Die Steuereinrichtung 35 ist Ć¼ber die Signalleitung 33 in Reihe mit der ersten Elektromagnetventilspulen 55 sowie der zweiten Elektromagnet-Spule 57 geschaltet. Ein Anschlussende 59 der Elektromagnet-Spule 57 ist dabei zwischen den beiden Gegenankern 51 angeordnet. Das Anschlussende 59 erstreckt sich dabei in einem Zwischenraum 61 zwischen den beiden Gegenankern 51 in Richtung auf den Magnetanker 25 des Ventilstƶssels 23. Dabei dient der Magnetanker 25 des Ventilstƶssels 23 als ein elektrischer Schalter, der bei Kontakt mit dem Anschlussende 59 einen Signalschaltkreis S schlieƟt. In dem Signalschaltkreis S sind in Reihe die elektrischen Steuereinrichtung 35, die erste und zweite Elektromagnet-Spule 55, 57, das Anschlussende 59. der Ventilstƶssel 25 mit seinem Magnetanker 25 geschaltet. Der Ventilstƶssel 23 ist Ć¼ber den ersten Erdungsanschluss 41 des Gashahns in elektrischer Verbindung mit der ebenfalls Ć¼ber den zweiten Erdungsanschluss 43 geerdeten Steuereinrichtung 35.In the Figures 2 and 3 the magnetic insert 17 of the solenoid valve is shown in an enlarged view. In the FIG. 2 is the valve stem 23, as in the FIG. 1 , shown in its closed position. The control device 35 is connected via the signal line 33 in series with the first solenoid valve coils 55 and the second solenoid coil 57. A terminal end 59 of the solenoid coil 57 is between the two Counter anchors 51 arranged. The connection end 59 extends in a gap 61 between the two counter-anchors 51 in the direction of the armature 25 of the valve stem 23. Here, the armature 25 of the valve stem 23 serves as an electrical switch which closes a signal circuit S in contact with the terminal end 59. In the signal circuit S are in series, the electrical control device 35, the first and second solenoid coil 55, 57, the connection end 59th of the valve stem 25 with its armature 25 is connected. The valve stem 23 is in electrical connection with the control device 35, which is also earthed via the second grounding connection 43, via the first earth connection 41 of the gas tap.

In der Figur 3 drĆ¼ckt die Hahnachse 9 aufgrund einer DruckbetƤtigung des Knebels 11 den Ventilteller 27 auƟer Anlage mit dem Ventilsitz 31. Dadurch ist einerseits der Gasweg 15 im Gashahn 7 geƶffnet. Andererseits ist der Magnetanker 25 im elektrischen Kontakt mit den Anschlussende 59. Der oben beschriebene Signalschaltkreis S ist daher geschlossen. In diesem Fall kann eine geringfĆ¼gige Strommenge, beispielsweise 20 mA, von der Steuereinrichtung 35 Ć¼ber die Elektromagnetventilspulen 55, 57, dem Anschlussende 59, dem Ventilstƶssel 23, dem ersten Erdungsanschluss 41 zum zweiten Erdungsanschluss 43 wieder zurĆ¼ck in die Steuereinrichtung 35 flieƟen. Die Steuereinrichtung 35 erfasst somit die Ɩffnung des Gasweges 15 durch den Ventilstƶssel 23. In Antwort auf dieses Ɩffnungssignal steuert die Steuereinrichtung 35 die ZĆ¼ndkerze 37 zur FlammenentzĆ¼ndung am Gasbrenner 1 an.In the FIG. 3 pushes the cock axis 9 due to a pressure actuation of the toggle 11 the valve plate 27 out of engagement with the valve seat 31. As a result, on the one hand, the gas path 15 is opened in the gas tap 7. On the other hand, the armature 25 is in electrical contact with the terminal end 59. The signal circuit S described above is therefore closed. In this case, a small amount of current, for example, 20 mA, from the control device 35 via the solenoid valve coils 55, 57, the connection end 59, the valve stem 23, the first ground terminal 41 to the second ground terminal 43 again flow back into the control device 35. The control device 35 thus detects the opening of the gas path 15 through the valve stem 23. In response to this opening signal, the control device 35 controls the spark plug 37 for flame ignition on the gas burner 1 at.

In der Figur 4 ist das zweite AusfĆ¼hrungsbeispiel der Erfindung dargestellt. Demzufolge ist die elektrische Steuereinrichtung Ć¼ber die Signalleitung 33 unmittelbar mit dem Anschlussende 59 in elektrischer Verbindung. Im Unterschied zu dem ersten AusfĆ¼hrungsbeispiel sind daher die beiden Elektromagnetventilspulen 55, 57 nicht in den Signalschaltkreis S zwischengeschaltet. In dem Signalschaltkreis S gemƤƟ der Figur 4 ist daher die elektrische Steuereinrichtung 35, das Anschlussende 59, der Ventilstƶssel 23 mit dem Magnetanker 25 sowie dessen zugeordneter erster Erdungsanschluss 41 und der zweite Erdungsanschluss 43 der Steuereinrichtung 35 in Reihe geschaltet. Im Unterschied zu dem ersten AusfĆ¼hrungsbeispiel ist dem Gasbrenner 1 ein Thermoelement 63 fĆ¼r eine Flammenerkennung zugeordnet. Das Thermoelement 63 ist in einem Thermo-Stromschaltkreis T geschaltet, und zwar in Reihe mit der ersten Elektromagnetventilspule und der zweiten Elektromagnetventilspule. Im Brennerbetrieb wird das Thermoelement 63 durch die Flammen erwƤrmt und erzeugt dadurch einen Thermostrom. Durch den Thermostrom des Thermoschaltkreises T wird in den Elektromagnetventilspulen 55, 57 eine magnetische Haltekraft erzeugt, die den Magnetanker 25 des Ventilstƶssels 23 in seiner Ɩffnungsposition hƤlt.In the FIG. 4 the second embodiment of the invention is shown. Consequently, the electrical control device via the signal line 33 directly to the terminal end 59 in electrical connection. In contrast to the first embodiment, therefore, the two solenoid valve coils 55, 57 are not interposed in the signal circuit S. In the signal circuit S according to the FIG. 4 is therefore the electrical control device 35, the terminal end 59, the valve stem 23rd to the armature 25 and its associated first ground terminal 41 and the second ground terminal 43 of the control device 35 connected in series. In contrast to the first exemplary embodiment, the gas burner 1 is assigned a thermocouple 63 for flame detection. The thermocouple 63 is connected in a thermal power circuit T, in series with the first solenoid valve coil and the second solenoid valve coil. In burner operation, the thermocouple 63 is heated by the flames and thereby generates a thermal current. By the thermal current of the thermal circuit T, a magnetic holding force is generated in the solenoid valve coils 55, 57, which holds the armature 25 of the valve stem 23 in its open position.

Im Unterschied zum zweiten AusfĆ¼hrungsbeispiel ist gemƤƟ dem ersten AusfĆ¼hrungsbeispiel die ZĆ¼ndelektrode 37 derart ausgebildet, dass sie ein Erlƶschen der Gasflamme am Brenner Ć¼berwachen kann. Im Falle eines Erlƶschens der Gasflamme am Brenner 1 wird ein entsprechender Temperaturabfall an der ZĆ¼ndelektrode 37 erfasst zu der Steuereinrichtung weitergeleitet. In Antwort auf das erfasste Signal steuert die elektronische Steuereinrichtung die ZĆ¼ndelektrode 37 an, um eine erneute FlammenentzĆ¼ndung zu bewirken. Sollte diese wider ZĆ¼ndung des Gases innerhalb eines vorgegebenen Zeitintervalls oder nach einer Anzahl von vorgegebenen ZĆ¼ndfunken nicht erfolgen, unterbricht die elektrische Steuereinrichtung den Signalschaltkreis. Dadurch wird die magnetische Haltekraft der Elektromagnet-Spulen 55, 57 unterbrochen, wodurch sich der Ventilstƶssel in seine SchlieƟposition zurĆ¼ckstellt.In contrast to the second embodiment, according to the first embodiment, the ignition electrode 37 is formed such that it can monitor extinction of the gas flame at the burner. In the case of extinction of the gas flame at the burner 1, a corresponding drop in temperature at the ignition electrode 37 is detected forwarded to the control device. In response to the detected signal, the electronic controller drives the ignition electrode 37 to cause re-ignition of the flame. Should this not occur within a predetermined time interval or after a number of predetermined sparks against ignition of the gas, the electrical control device interrupts the signal circuit. Characterized the magnetic holding force of the solenoid coils 55, 57 is interrupted, whereby the valve stem is returned to its closed position.

Claims (12)

  1. Gas cooker hob with a gas cock, wherein the gas cock is provided for gas quantity regulation for a gas burner (1) and comprises a cock axle (9), electromagnetic valve (13) and a position sensor (23, 59), wherein the gas cock is actuable by means of an actuating knob (11) via the cock axle (9), the electromagnetic valve (13) is provided for opening or closing a gas path (15) to the gas burner (1) and can be brought by pressure actuation of the cock axle (9) by way of the actuating knob (11) into an open setting, and the position sensor (23, 59) is constructed as an electrical switch for closing a signal line (33) leading to the control device (35), characterised in that the position sensor (23, 59) detects an open setting of the electromagnetic valve (13) and conducts a corresponding opening signal to a control device (35), that the position sensor (23, 59) is constructed within a housing (21) of the electromagnetic valve (13) and that the electrical switch is constructed as a valve plunger (23), which on pressure actuation (I) of the gas cock (7) comes into contact with a terminal end (59) of the signal line (33), of the electromagnetic valve (13).
  2. Gas cooker hob according to claim 1, characterised in that the electromagnetic valve (13) is constructed in the gas cock (7).
  3. Gas cooker hob according to one of claims 1 and 2, characterised in that the control device (35) is associated with an ignition electrode (37) for flame generation at the gas burner.
  4. Gas cooker hob according to any one of claims 1 to 3, characterised in that the control device (35) controls the ignition electrode (37) for flame ignition in response to the opening signal of the position sensor (23, 59).
  5. Gas cooker hob according to any one of claims 1 to 4, characterised in that the terminal end (59) of the electrical switch is arranged between two counter-armatures (51) of electromagnetic valve coils (55, 57).
  6. Gas cooker hob according to any one of claims 1 to 5, characterised in that the electrical switch when pressure actuation (I) takes place closes a signal circuit (S) of the control device (35).
  7. Gas cooker hob according to claim 6, characterised in that the control device (35), the terminal end (59) and the valve plunger (23) together with its magnet armature (25) are arranged in a series, which is electrically connected with the control device (35), in the signal circuit (S).
  8. Gas cooker hob according to claim 7, characterised in that the electrical connection between the valve plunger (23) and the control device is formed by way of a first earth connection (41) of the gas cock (7) and a second earth connection (43) of the control device (35).
  9. Gas cooker hob according to any one of claims 1 to 8, characterised in that the valve plunger (23) is electrically earthed by means of the gas cock (7) by way of a first earth connection (41).
  10. Gas cooker hob according to any one of claims 7, 8 and 9, characterised in that additional electromagnetic valve coils (55, 57) are integrated in the signal circuit (S).
  11. Gas cooker hob according to any one of claims 1 to 10, characterised in that the control device (35) and the gas cock (7) are electrically earthed by way of earth connections (41, 43).
  12. Gas cooker hob according to any one of claims 1 to 11, characterised in that when the electrical switch is closed the electromagnetic coils (55, 57) magnetically hold the valve plunger (23) in its open position.
EP05110103A 2004-11-10 2005-10-28 Gas cooking top with a gasvalve Not-in-force EP1657492B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES200402784A ES2258910B1 (en) 2004-11-10 2004-11-10 GAS KITCHEN PLATE.

Publications (3)

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EP1657492A2 EP1657492A2 (en) 2006-05-17
EP1657492A3 EP1657492A3 (en) 2007-12-26
EP1657492B1 true EP1657492B1 (en) 2013-02-13

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Family Applications (1)

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ES (2) ES2258910B1 (en)

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US11067285B2 (en) 2016-07-11 2021-07-20 Copreci, S. Coop. Gas cooking appliance

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ES2391516B1 (en) * 2005-02-28 2013-10-04 Bsh ElectrodomƩsticos EspaƱa, S.A. GAS DEVICE, IN PARTICULAR A FIRE OF A GAS KITCHEN.
ES2291083B1 (en) * 2005-08-05 2008-10-16 Bsh Electrodomesticos EspaƱa, S.A. GAS KITCHEN PLATE.
ES2291084B1 (en) * 2005-08-05 2008-10-16 Bsh Electrodomesticos EspaƱa, S.A. GAS KITCHEN PLATE.
CN104776460B (en) * 2015-04-21 2017-03-08 čµµęŒÆ华 A kind of air delivery device for gas kitchen ranges and gas kitchen ranges device
EP3205935B1 (en) * 2016-02-11 2019-06-12 Copreci, S.Coop. Gas appliance comprising a gas cock and a control device

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Also Published As

Publication number Publication date
EP1657492A3 (en) 2007-12-26
ES2258910A1 (en) 2006-09-01
EP1657492A2 (en) 2006-05-17
ES2258910B1 (en) 2007-06-01
ES2400718T3 (en) 2013-04-11

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