EP0732544B1 - Spark and flame monitoring system for burners - Google Patents

Spark and flame monitoring system for burners Download PDF

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Publication number
EP0732544B1
EP0732544B1 EP96103931A EP96103931A EP0732544B1 EP 0732544 B1 EP0732544 B1 EP 0732544B1 EP 96103931 A EP96103931 A EP 96103931A EP 96103931 A EP96103931 A EP 96103931A EP 0732544 B1 EP0732544 B1 EP 0732544B1
Authority
EP
European Patent Office
Prior art keywords
flame
valve
main burner
switch
burner
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
EP96103931A
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German (de)
French (fr)
Other versions
EP0732544B2 (en
EP0732544A3 (en
EP0732544A2 (en
Inventor
Derk Vegter
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.)
Garrett Motion SARL
Original Assignee
Honeywell BV
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Application filed by Honeywell BV filed Critical Honeywell BV
Publication of EP0732544A2 publication Critical patent/EP0732544A2/en
Publication of EP0732544A3 publication Critical patent/EP0732544A3/en
Publication of EP0732544B1 publication Critical patent/EP0732544B1/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
    • F23N5/02—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
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/725—Protection against flame failure by using flame detection devices
    • 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
    • F23N2223/00—Signal processing; Details thereof
    • F23N2223/22—Timing network
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/22—Pilot burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/22—Pilot burners
    • F23N2227/24—Pilot burners the pilot burner not burning continuously
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/28—Ignition circuits
    • F23N2227/30—Ignition circuits for pilot burners
    • 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
    • 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
    • F23N2235/18—Groups of two or more valves
    • 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

Definitions

  • the invention relates to an ignition and flame monitoring device according to the preamble of claim 1.
  • a device known from DE-A 37 24 084 switches of this type the flame sensor emits the ignition electrodes when the pilot flame is generated Transformer while the pilot flame continues to burn and from a thermocouple is monitored. So the flame of the pilot burner is constantly monitored and at whose extinction shut the plant down. This means that the pilot flame is constantly on.
  • ignition and flame monitoring devices are known, in which the same the main burner flame is ignited with the help of a spark igniter so that the Pilot burner and the gas consumption it causes are eliminated.
  • the main burner MB of a burner system is via a first main burner valve MV1 and a second valve MV2 supplied with gas. Between the two valves MV1 and MV2 branches off a line to the pilot burner valve PV, which is the pilot burner PB feeds. This is assigned an ignition electrode ZE, which is generated by an ignition generator IG is supplied with ignition pulses.
  • the timer ZG serving as a safety timer carries over its output signal the line L3 to the safety switch SI, whose contact si in the power supply line between an AC voltage source V, e.g. the AC mains voltage, and one Heat demand switch WB is located.
  • the three gas valves MV1, MV2 and PV are Solenoid valves and each equipped with an excitation winding E1, E2 or E3.
  • the Safety switch SI opens its contact si as soon as it is triggered by the timer ZG Line L3 a blocking signal is supplied. The contact si can only be done manually getting closed.
  • the main burner valve MV1 can be a servo-controlled Act control valve, which depends on the gas flow rate to the main burner MB regulates the amount of heat demand.
  • the second valve MV2 is a conventional one Closing valve. Both valves MV1 and MV2 and possibly also the pilot burner valve PV can be accommodated in a common housing in a known manner.
  • the flame amplifier FV does not generate one Output signal so that the timer ZG after its delay time over the Line L3 triggers the safety switch SI and its contact si the entire system switches off. Since the power supply to all three valves is interrupted will, these valves go into the closed position so that gas neither to the pilot burner nor to the Main burner flows.
  • This arrangement is particularly advantageous because the main burner MB with a lean gas / air mixture can be operated, which generates low pollutants, but is difficult to ignite. It is therefore not directly affected by electrical sparks, but ignited by the flame of the pilot burner PB, which in turn has a rich one Gas / air mixture operated and can be easily ignited. Because the pilot burner is switched off during normal operation, it does not generate any during normal operation Pollutants.

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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 Zünd- und Flammenüberwachungseinrichtung gemäß Oberbegriff des Anspruchs 1. Bei einer aus DE-A 37 24 084 bekannten Einrichtung dieser Art schaltet der Flammenfühler beim Entstehen der Zündflamme einen die Zündelektroden speisenden Transformator ab, während die Zündflamme weiter brennt und von einem Thermoelement überwacht wird. Es wird also ständig die Flamme des Zündbrenners überwacht und bei deren Erlöschen die Anlage stillgesetzt. Dies bedeutet, daß die Zündflamme ständig brennt. Andererseits sind Zünd- und Flammenüberwachungseinrichtungen bekannt, bei denen gleich die Hauptbrennerflamme mit Hilfe eines Funkenzünders gezündet wird, so daß der Zündbrenner und der von ihm verursachte Gasverbrauch entfällt. Es hat sich jedoch gezeigt, daß Hauptbrenner, welche mit einem mageren Gas/Luft-Gemisch betrieben werden, um möglichst wenig Schadstoffe, insbesondere NOX zu erzeugen, schwierig durch einen Funkenzünder entzündet werden können. Mit der Erfindung wird hier Abhilfe geschaffen, indem im normalen Brennerzyklus die Flamme des Hauptbrenners überwacht wird und zur Zündung ein Zündbrenner dient, der mit Hilfe eines Funkenzünders entzündet und nach dem Stabilisieren der Hauptbrennerflamme zusammen mit der Zündeinrichtung wieder abgeschaltet wird. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.The invention relates to an ignition and flame monitoring device according to the preamble of claim 1. In a device known from DE-A 37 24 084 switches of this type the flame sensor emits the ignition electrodes when the pilot flame is generated Transformer while the pilot flame continues to burn and from a thermocouple is monitored. So the flame of the pilot burner is constantly monitored and at whose extinction shut the plant down. This means that the pilot flame is constantly on. On the other hand, ignition and flame monitoring devices are known, in which the same the main burner flame is ignited with the help of a spark igniter so that the Pilot burner and the gas consumption it causes are eliminated. However, it has been shown that main burners, which are operated with a lean gas / air mixture to It is difficult for one to produce as few pollutants as possible, especially NOX Spark igniters can be ignited. The invention provides a remedy here by monitoring the flame of the main burner in the normal burner cycle and for Ignition is a pilot burner that ignites with the help of a spark igniter and after Stabilize the main burner flame together with the igniter again is switched off. Advantageous refinements and developments of the invention result from the subclaims.

Die Erfindung wird nachfolgend anhand eines in der Zeichnung wiedergegebenen Ausführungsbeispiels erläutert.The invention is described below with reference to a drawing Exemplary embodiment explained.

Der Hauptbrenner MB einer Brenneranlage wird über ein erstes Hauptbrennerventil MV1 sowie ein zweites Ventil MV2 mit Gas versorgt. Zwischen den beiden Ventilen MV1 und MV2 zweigt eine Leitung zum Zündbrennerventil PV ab, welches den Zündbrenner PB speist. Diesem ist eine Zündelektrode ZE zugeordnet, welche von einem Zündgenerator IG mit Zündimpulsen versorgt wird.The main burner MB of a burner system is via a first main burner valve MV1 and a second valve MV2 supplied with gas. Between the two valves MV1 and MV2 branches off a line to the pilot burner valve PV, which is the pilot burner PB feeds. This is assigned an ignition electrode ZE, which is generated by an ignition generator IG is supplied with ignition pulses.

Eine in den Flammenbereich F des Hauptbrenners MB eintauchende Flammenfühlerelektrode FE ist mit dem Eingang eines Flammenfühlerverstärkers FV verbunden, der einerseits auf der Leitung L1 ein Ausgangssignal zum Stillsetzen eines Zeitgebers ZG liefert und andererseits über die Leitung L2 den Ruhekontaktschalter RK steuert. Der als Sicherheitszeitgeber dienende Zeitgeber ZG führt sein Ausgangssignal über die Leitung L3 dem Sicherheitsschalter SI zu, dessen Kontakt si in der Stromzuleitung zwischen einer Wechselspannungsquelle V, z.B. der Netzwechselspannung, und einem Wärmebedarfsschalter WB liegt. Die drei Gasventile MV1, MV2 und PV sind Magnetventile und mit jeweils einer Erregerwicklung E1, E2 bzw. E3 ausgestattet. Der Sicherheitsschalter SI öffnet seinen Kontakt si sobald ihm vom Zeitgeber ZG über die Leitung L3 ein Sperrsignal zugeführt wird. Der Kontakt si kann nur von Hand wieder geschlossen werden.One immersed in the flame area F of the main burner MB Flame sensor electrode FE is connected to the input of a flame sensor amplifier FV connected, the one hand on line L1 an output signal for stopping a Timer ZG delivers and on the other hand via line L2 the normally closed contact switch RK controls. The timer ZG serving as a safety timer carries over its output signal the line L3 to the safety switch SI, whose contact si in the power supply line between an AC voltage source V, e.g. the AC mains voltage, and one Heat demand switch WB is located. The three gas valves MV1, MV2 and PV are Solenoid valves and each equipped with an excitation winding E1, E2 or E3. Of the Safety switch SI opens its contact si as soon as it is triggered by the timer ZG Line L3 a blocking signal is supplied. The contact si can only be done manually getting closed.

Soll der Brenner eingeschaltet werden, weil Wärmebedarf besteht, so wird der Kontakt WB, beispielsweise der Kontakt eines Raumthermostaten, geschlossen. Hierdurch gelangt die Netzwechselspannung von der Spannungsquelle V über den Sicherheitskontakt si und den Wärmebedarfsschalter WB einerseits an die beiden Erregerwicklungen E1 und E2 der in der Gasleitung zum Hauptbrenner MB liegenden Ventile MV1 und MV2, andererseits über den Ruhekontaktschalter RK zur Erregerwicklung E3 des Zündbrennerventils PV und schließlich über die Leitung L4 an den Versorgungseingang des Zeitgebers ZG. Von der Leitung L5 zwischen Ruhekontaktschalter RK und Erregerwicklung E3 des Zündbrennerventils zweigt ferner eine Leitung L6 zum Zündgenerator IG ab, der die Zündelektrode ZE mit Zündimpulsen versorgt.If the burner is to be switched on because there is a need for heat, contact WB, for example, the contact of a room thermostat closed. As a result, the Mains AC voltage from the voltage source V via the safety contact si and the Heat demand switch WB on the one hand to the two excitation windings E1 and E2 in the Gas line to the main burner MB valves MV1 and MV2, on the other hand via the Normally open contact switch RK for excitation winding E3 of pilot burner valve PV and finally via line L4 to the supply input of the timer ZG. Of the Line L5 between normally closed contact switch RK and excitation winding E3 of the Pilot burner valve also branches off a line L6 to the ignition generator IG, which Ignition electrode ZE supplied with ignition pulses.

Beim Auftreten eines Wärmebedarfs, d.h. beim Schließen des Wärmebedarfsschalters WB wird einerseits über die Ventile MV1 und MV2 Gas zum Hauptbrenner MB und andererseits über das Zündbrennerventil PV Gas zum Zündbrenner PB geleitet. Da gleichzeitig der Zündgenerator IG eingeschaltet wird, erhält die Zündelektrode ZE Zündimpulse und zündet die Flamme des Zündbrenners PB. Diese wiederum entzündet das aus dem Hauptbrenner MB ausströmende Gas, so daß bei ordnungsgemäßem Betrieb die Hauptbrennerflamme F entsteht und von der Flammenfühlerelektrode FE erfaßt wird.When there is a need for heat, i.e. when closing the heat demand switch WB becomes the main burner MB and on the other hand passed to the pilot burner PB via the pilot gas valve PV gas. There at the same time the ignition generator IG is switched on, the ignition electrode ZE is given Ignition pulses and ignites the flame of the pilot burner PB. This in turn ignites it gas flowing out of the main burner MB, so that when properly operated the Main burner flame F arises and is detected by the flame sensor electrode FE.

Mit der Einschaltung der Gaszufuhr zum Hauptbrenner und zum Zündbrenner sowie der Einschaltung des Zündgenerators ZG wird gleichzeitig über die Leitung L4 der Zeitgeber ZG in Gang gesetzt. Er hat beispielsweise eine Verzögerungszeit von 5 Sekunden, die, wie bekannt, von der Größe der Brenneranlage, also insbesondere vom Gasdurchsatz zum Hauptbrenner abhängt. Wird ordnungsgemäß eine Flamme F von der Fühlerelektrode FE festgestellt, so entsteht am Ausgang des Flammenverstärkers FV ein Schaltsignal, welches einerseits über die Leitung L1 den Zeitgeber ZG stillsetzt, so daß dieser kein Sperrsignal auf der Leitung L3 abgibt, und andererseits über die Leitung L2 den Ruhekontaktschalter RK von seinem Ruhekontakt rk auf den Gegenkontakt gk umlegt. Hierdurch werden das Zündbrennerventil PV und der Zündgenerator IG stromlos. Es fließt dann weder Gas zum Zündbrenner PB, noch werden weiterhin Zündfunken erzeugt. By switching on the gas supply to the main burner and pilot burner as well as the Switching on the ignition generator ZG becomes the timer simultaneously via line L4 ZG started. For example, it has a delay time of 5 seconds, which, like known from the size of the burner system, in particular from the gas throughput Main burner depends. If a flame F is properly sensed by the sensor electrode FE determined, a switching signal arises at the output of the flame amplifier FV, which on the one hand, stops the timer ZG via line L1, so that it does not have a blocking signal of line L3, and on the other hand via line L2 the normally closed contact switch RK switched from its normally closed contact rk to the mating contact gk. This will Pilot burner valve PV and the ignition generator IG de-energized. Then neither gas flows to Pilot burner PB, ignition sparks are still generated.

Beim Hauptbrennerventil MV1 kann es sich, wie bekannt, um ein servogesteuertes Regelventil handeln, welches den Gasdurchsatz zum Hauptbrenner MB in Abhängigkeit von der Höhe des Wärmebedarfs regelt. Das zweite Ventil MV2 ist ein herkömmliches Schließventil. Beide Ventile MV1 und MV2 und ggf. auch das Zündbrennerventil PV können in bekannter Weise in einem gemeinsamen Gehäuse untergebracht sein.As is known, the main burner valve MV1 can be a servo-controlled Act control valve, which depends on the gas flow rate to the main burner MB regulates the amount of heat demand. The second valve MV2 is a conventional one Closing valve. Both valves MV1 and MV2 and possibly also the pilot burner valve PV can be accommodated in a common housing in a known manner.

Sollte sich keine Hauptflamme F bilden, so erzeugt der Flammenverstärker FV kein Ausgangssignal, so daß der Zeitgeber ZG nach Ablauf seiner Verzögerungszeit über die Leitung L3 den Sicherheitsschalter SI zum Ansprechen bringt und dessen Kontakt si die gesamte Anlage abschaltet. Da hierbei die Stromzufuhr zu allen drei Ventilen unterbrochen wird, gehen diese Ventile in Schließlage, so daß Gas weder zum Zündbrenner noch zum Hauptbrenner fließt.If no main flame F is formed, the flame amplifier FV does not generate one Output signal so that the timer ZG after its delay time over the Line L3 triggers the safety switch SI and its contact si the entire system switches off. Since the power supply to all three valves is interrupted will, these valves go into the closed position so that gas neither to the pilot burner nor to the Main burner flows.

Besonders vorteilhaft ist diese Anordnung deshalb, weil der Hauptbrenner MB mit einem mageren Gas/Luft-Gemisch betrieben werden kann, welches geringe Schadstoffe erzeugt, aber schlecht zu zünden ist. Er wird deshalb nicht unmittelbar von elektrischen Zündfunken, sondern durch die Flamme des Zündbrenners PB gezündet, der seinerseits mit einem fetten Gas/Luft-Gemisch betrieben und somit leicht entzündet werden kann. Da der Zündbrenner während des Normalbetriebs abgeschaltet ist, erzeugt er während des Normalbetriebs keine Schadstoffe.This arrangement is particularly advantageous because the main burner MB with a lean gas / air mixture can be operated, which generates low pollutants, but is difficult to ignite. It is therefore not directly affected by electrical sparks, but ignited by the flame of the pilot burner PB, which in turn has a rich one Gas / air mixture operated and can be easily ignited. Because the pilot burner is switched off during normal operation, it does not generate any during normal operation Pollutants.

Claims (7)

  1. Spark and flame monitoring system for burners, comprising:
    a) a main burner (MB) and a main burner valve (MV1) associated therewith;
    b) a pilot burner (PB) and a pilot burner valve (PV) associated therewith;
    c) an ignition device (IG, ZE) associated with said pilot burner; and
    d) a flame detector (FE, FV) shutting-down said ignition device (IG) in case of an existing flame (F),
       characterized in that
    e) said flame detector (FE, FV) monitors the flame (F) of said main burner (MB), and provides a shut-down signal for said pilot burner valve (PV) in case of an existing main burner flame; and
    f) a timer (ZG) also responsive to the output signal of said flame detector (FV) shuts-down the burner, if a predetermined time period after the pilot burner valve (PV) has been opened is expired and if no main burner flame (F) is detected until the expiration of said time period.
  2. System according to claim 1, characterized in that said timer (ZG) acts on a safety switch (SI, si) which is only manually resettable and is located in a current supply lead for said spark and flame monitoring device.
  3. System according to claim 1 or 2, characterized in that :
    a) said main burner valve (MV1) and said timer (ZG) are connected to a power supply unit (V) via a heat requirement switch (WB); and
    b) said pilot burner valve (PV) and said ignition device (IG) are connected to said heat requirement switch (WB) via a spacing contact switch (RK), whereby said spacing contact switch is controlled by the output signal of said flame detector (FE, FV) and opens in case of an existing main burner flame.
  4. System according to claim 2 or 3, characterized in that the contact (si) of said safety switch (SI) is connected in series with said heat requirement switch (WB) between said power supply unit (V) and said main burner valve (MV1).
  5. System according to claim 4, characterized in that the power supply input of said timer (ZG), the fixed contact of said spacing contact switch (RK) and the main burner valve (MV1) are connected to said heat requirement switch (WB).
  6. System according to one of claims 1 to 5, characterized in that a second valve (MV2) is lined up with said main burner valve (MV1), and that the lead to said pilot burner valve (PV) branches off between said two valves.
  7. System according to claim 6, characterized in that the energizing coil (E2) of said second valve is also connected to the junction of said spacing contact switch (RK) with that safety switch contact (si).
EP96103931A 1995-03-17 1996-03-13 Spark and flame monitoring system for burners Expired - Lifetime EP0732544B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19509797 1995-03-17
DE19509797A DE19509797C1 (en) 1995-03-17 1995-03-17 Ignition and flame monitoring device for gas burner

Publications (4)

Publication Number Publication Date
EP0732544A2 EP0732544A2 (en) 1996-09-18
EP0732544A3 EP0732544A3 (en) 1996-11-27
EP0732544B1 true EP0732544B1 (en) 1998-12-09
EP0732544B2 EP0732544B2 (en) 2005-12-14

Family

ID=7757011

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96103931A Expired - Lifetime EP0732544B2 (en) 1995-03-17 1996-03-13 Spark and flame monitoring system for burners

Country Status (2)

Country Link
EP (1) EP0732544B2 (en)
DE (2) DE19509797C1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19812834B4 (en) * 1998-03-24 2004-12-16 Alstom Process for igniting the burners of combustion chambers in gas turbine plants
DE102004012202A1 (en) 2004-03-12 2005-09-29 Mertik Maxitrol Gmbh & Co. Kg Gas regulating valve
EP2020572B1 (en) * 2007-07-31 2012-12-26 Sit la Precisa S.p.a. Automatic device for the ignition and control of a gas apparatus and relative driving method
IT201800005549A1 (en) * 2018-05-21 2019-11-21 Heating appliance with combustible gas burner

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1013855B (en) * 1954-01-22 1957-08-14 Junkers & Co Gas heated liquid heater
JPS587130B2 (en) † 1976-11-29 1983-02-08 株式会社日立製作所 Combustion control device
US4137035A (en) * 1977-02-16 1979-01-30 Electronics Corporation Of America Burner control apparatus
US4303383A (en) * 1979-11-09 1981-12-01 Honeywell Inc. Condition control system with safety feedback means
JPS5892727A (en) * 1981-04-09 1983-06-02 Hattori Kogyo Kk Automatic gas cooker
JPS62182530A (en) * 1986-02-06 1987-08-10 Rinnai Corp Gas safety valve
DE3724084A1 (en) * 1986-07-23 1988-01-28 Vaillant Joh Gmbh & Co Control device for starting up the gas burner of a gas-fired water heater

Also Published As

Publication number Publication date
EP0732544B2 (en) 2005-12-14
EP0732544A3 (en) 1996-11-27
EP0732544A2 (en) 1996-09-18
DE19509797C1 (en) 1996-06-27
DE59600927D1 (en) 1999-01-21

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