EP4155610B1 - Method for monitoring the ignition of a burner flame - Google Patents
Method for monitoring the ignition of a burner flame Download PDFInfo
- Publication number
- EP4155610B1 EP4155610B1 EP22195317.7A EP22195317A EP4155610B1 EP 4155610 B1 EP4155610 B1 EP 4155610B1 EP 22195317 A EP22195317 A EP 22195317A EP 4155610 B1 EP4155610 B1 EP 4155610B1
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- EP
- European Patent Office
- Prior art keywords
- ignition
- burner
- sensor
- flame
- spark
- 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.)
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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
- F23N5/08—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements
- F23N5/082—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements 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
- F23N2229/00—Flame sensors
- F23N2229/04—Flame sensors sensitive to the colour of flames
Definitions
- the US 3 574 496 A describes a process in which an ignition is checked using an ultraviolet sensor and a flame detector. An ignition spark is observed using an ultraviolet sensor. If a flame is detected by the flame detector, the ignition process is terminated.
- the JP S60 82720 A describes a process in which an optical fiber first observes an ignition spark.
- a fuel gas supply to a pre-burner is opened.
- a fuel gas supply to a main burner is opened, igniting the main burner.
- the object of the present invention is to at least partially solve the problems described with reference to the prior art.
- This object is solved with the invention according to the features of the independent patent claims.
- Further advantageous embodiments are specified in the dependently formulated patent claims as well as in the description and in particular also in the description of the figures. It should be noted that the person skilled in the art can combine the individual features in a technologically sensible manner and thus arrive at further embodiments of the invention.
- the burner preferably refers to a burner body from which the fuel gas flows out through a plurality of openings into a combustion chamber which surrounds the burner and in which there are preferably lines which then dissipate the heat generated by the burner.
- the burner body is preferably cylindrical and made of a metal material.
- the outer surface of the burner body (facing the combustion chamber) is referred to here as the burner surface from which the flames extend into the combustion chamber.
- the area in which the mixture exits the burner and in which the openings are arranged is referred to as the combustion area.
- the flames form above the combustion area when the burner has ignited.
- the UV sensor is preferably a photodetector that can detect UV light (in particular in the range of wavelengths from 100 nm [nanometers] to 400 nm [nanometers]) and convert it into an electrical signal that makes it possible to detect the amount of UV light that was captured by the UV sensor.
- the UV sensor is preferably connected to electronics and in particular to a control unit that evaluates the electrical signals generated by the UV sensor and, based on this, carries out the described method and assesses whether ignition conditions exist.
- the described method for detecting ignition conditions (the creation of the ignition spark) using the UV sensor can be used to determine whether inadequate ignition conditions or inadequate ambient conditions are the reason for the failure of ignition.
- Delayed ignition can lead to sudden combustion or deflagration, particularly when hydrogen is burned, which can often cause noises, bangs or even flashbacks of flames back into the burner.
- the UV sensor is arranged outside a combustion area above a burner surface and has an oblique viewing direction which is aligned with the burner surface in the ignition area of the ignition device.
- This arrangement of the UV sensor allows the UV sensor to be positioned in such a way that the temperatures generated by combustion do not have such a strong effect on the UV sensor and do not impair it as much. At the same time, the UV sensor is positioned in such a way that an ignition spark can be easily detected.
- the ignition device has an ignition electrode.
- An ignition electrode preferably comprises two ignition contacts that are spaced apart from one another and between which an arc forms when an electrical voltage can be applied to the contacts.
- the ignition contacts of the ignition electrode are preferably always supplied with current for a very short time, for example via an ignition capacitor that discharges suddenly. In this way, high electrical voltages and currents and thus also strong ignition sparks can be generated.
- the gas burned with the flame contains at least 50%, preferably at least 97% hydrogen.
- a proportion of 50% or more hydrogen results in a fuel gas whose properties are already largely dominated by hydrogen.
- a gas with 97% or more hydrogen can be considered almost like pure hydrogen.
- a burner for combustion of gas with an ignition device for generating an ignition spark and with at least one UV sensor, wherein the burner is designed to carry out the described method.
- control device configured to evaluate signals from at least one UV sensor of a burner according to the described method.
- Fig. 1 shows a burner 2 with a burner surface 7 on which combustion flames 1 form.
- the burner 1 has an interior 13 into which a mixture of gas and air flows through a supply line 14.
- the mixture passes through a plurality of openings on the burner surface 7 in a combustion region 6 into the combustion chamber 12, where the flames 1 form.
- Above the burner surface 7 in the combustion region there is also an ignition device 3 designed as an ignition electrode 10, with which an ignition spark 4 can be generated in an ignition region 9 in the combustion region 6.
- the ignition region 9 is monitored with the UV sensor 5, which is preferably aligned with a viewing direction 8 towards the ignition region 9.
- the UV sensor 5 and the ignition device 3 are connected to a control unit 11, which controls the ignition device 3 using the signals from the UV sensor 5.
- the control device 11 is also connected to a supply valve 15 on the supply line 14, with which the supply of the burner 2 with gas or with a mixture of gas and air can be controlled.
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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)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Description
In gasbefeuerten Heizgeräten existiert regelmäßig das Problem, dass dann, wenn keine Zündung erfolgt, jedoch trotzdem Gas in den Brenner strömt, sich unverbranntes Gemisch aus Gas und Luft in der Brennkammer sammelt, welches dann gegebenenfalls schlagartig verbrennen bzw. verpuffen kann.In gas-fired heating devices, the problem regularly arises that if no ignition occurs but gas still flows into the burner, an unburned mixture of gas and air collects in the combustion chamber, which can then suddenly burn or explode.
Insbesondere bei Wasserstoff als Brenngas ist dies problematisch, weil die Umgebungsbedingungen, die zur Zündung eines Gemischs aus Wasserstoff und Luft einzustellen sind, in einem sehr engen Bereich liegen müssen und kleine Abweichungen in der Gemischzusammensetzung die Zündung schon verhindern können bzw. zu störenden Geräuschen bei der Zündung führen können.This is particularly problematic when hydrogen is used as a fuel gas, because the ambient conditions that must be set to ignite a mixture of hydrogen and air must be within a very narrow range and small deviations in the mixture composition can prevent ignition or lead to disturbing noises during ignition.
Darüber hinaus sind bei mit Wasserstoff als Brenngas betriebenen Heizgeräten die Auswirkungen einer schlagartigen Verbrennung von angesammeltem Gemisch im Brennraum bzw. von Verpuffungen besonders kritisch. Eine verbesserte Überwachung ist aus diesem Grunde insbesondere bei Heizgeräten für die Befeuerung mit Wasserstoff wünschenswert.In addition, the effects of sudden combustion of the mixture accumulated in the combustion chamber or of deflagrations are particularly critical in heating devices that use hydrogen as fuel gas. For this reason, improved monitoring is particularly desirable for heating devices that use hydrogen fuel.
Die
Die
Aufgabe der vorliegenden Erfindung ist es, die mit Bezug auf den Stand der Technik geschilderten Probleme wenigstens teilweise zu lösen. Diese Aufgabe wird gelöst mit der Erfindung gemäß den Merkmalen der unabhängigen Patentansprüche. Weitere vorteilhafte Ausgestaltungen sind in den abhängig formulierten Patentansprüchen sowie in der Beschreibung und insbesondere auch in der Figurenbeschreibung angegeben. Es ist darauf hinzuweisen, dass der Fachmann die einzelnen Merkmale in technologisch sinnvoller Weise miteinander kombiniert und damit zu weiteren Ausgestaltungen der Erfindung gelangt.The object of the present invention is to at least partially solve the problems described with reference to the prior art. This object is solved with the invention according to the features of the independent patent claims. Further advantageous embodiments are specified in the dependently formulated patent claims as well as in the description and in particular also in the description of the figures. It should be noted that the person skilled in the art can combine the individual features in a technologically sensible manner and thus arrive at further embodiments of the invention.
Ein neuartiges Verfahren, ein entsprechend für das Verfahren eingerichteter Brenner, ein Steuergerät und ein Computerprogrammprodukt sollen nachfolgend beschrieben werden.A novel process, a burner designed for the process, a control device and a computer program product are described below.
Hier beschrieben wird ein Verfahren zur Überwachung der Zündung einer Flamme eines Brenners zur Verbrennung von Gas mit einer Zündeinrichtung zur Erzeugung eines Zündfunkens, wobei ein UV-Sensor verwendet wird, um UV-Emissionen des Zündfunkens zu ermitteln und daran zu erkennen, ob durch den Zündfunken Zündbedingungen hergestellt wurden. Zusätzlich wird überwacht, ob die Zündung der Flamme des Brenners erfolgt und dann, wenn mit dem UV-Sensor erkannt wurde, dass durch den Zündfunken geeignete Zündbedingungen hergestellt wurden, jedoch eine Zündung der Flamme unterbleibt, wird mindestens eine ungeeignete Umgebungsbedingung für die Zündung der Flamme diagnostiziert, wobei die mindestens eine ungeeignete Umgebungsbedingung ein Mischungsverhältnis von Gas und Luft außerhalb eines vorgegebenen Bereichs umfasst.This describes a method for monitoring the ignition of a flame of a burner for burning gas with an ignition device for generating an ignition spark, wherein a UV sensor is used to determine UV emissions of the ignition spark and to recognize whether ignition conditions have been created by the ignition spark. In addition, it is monitored whether the ignition of the flame of the burner takes place and then, if it is recognized with the UV sensor that suitable ignition conditions have been created by the ignition spark, but the flame does not ignite, at least one unsuitable ambient condition for the ignition of the flame, wherein the at least one unsuitable environmental condition comprises a mixture ratio of gas and air outside a predetermined range.
Der Brenner bezeichnet vorzugsweise einen Brennerkörper, aus dem das Brenngas durch eine Vielzahl von Öffnungen nach außen in einen Brennraum strömt, welcher den Brenner umgibt und in dem bevorzugt Leitungen sind, die die mit dem Brenner erzeugte Wärme dann abführen. Der Brennerkörper ist vorzugsweise zylindrisch und aus einem Metallmaterial hergestellt. Die äußere (zum Brennraum hin ausgerichtete) Oberfläche des Brennerkörpers wird hier als Brenneroberfläche bezeichnet von welcher ausgehend sich die Flammen in den Brennraum hinein erstrecken.The burner preferably refers to a burner body from which the fuel gas flows out through a plurality of openings into a combustion chamber which surrounds the burner and in which there are preferably lines which then dissipate the heat generated by the burner. The burner body is preferably cylindrical and made of a metal material. The outer surface of the burner body (facing the combustion chamber) is referred to here as the burner surface from which the flames extend into the combustion chamber.
Der Bereich, in dem das Gemisch aus dem Brenner austritt und in dem dafür die Öffnungen angeordnet sind, wird hier als Brennbereich bezeichnet. Oberhalb des Brennbereichs bilden sich die Flammen aus, wenn der Brenner gezündet hat.The area in which the mixture exits the burner and in which the openings are arranged is referred to as the combustion area. The flames form above the combustion area when the burner has ignited.
Es hat sich herausgestellt, dass ein mit der Zündeinrichtung hergestellter Zündfunke typischerweise charakteristische UV-Emissionen erzeugt, die mit einem UV-Sensor zuverlässig erkannt werden können. Der UV-Sensor ist bevorzugt ein Fotodetektor, der UV-Licht (insbesondere im Bereich der Wellenlängen von 100 nm [Nanometer] bis 400 nm [Nanometer] erkennen und in ein elektrisches Signal umwandeln kann, welches es ermöglicht die Menge an UV-Licht zu erkennen, die mit dem UV-Sensor aufgefangen wurde. Der UV-Sensor ist bevorzugt an eine Elektronik und insbesondere an ein Steuergerät angeschlossen, welches die von dem UV-Sensor erzeugten elektrischen Signale auswertet und hierauf basierend das beschriebene Verfahren durchführt und beurteilt, ob Zündbedingungen vorliegen.It has been found that an ignition spark produced by the ignition device typically produces characteristic UV emissions that can be reliably detected using a UV sensor. The UV sensor is preferably a photodetector that can detect UV light (in particular in the range of wavelengths from 100 nm [nanometers] to 400 nm [nanometers]) and convert it into an electrical signal that makes it possible to detect the amount of UV light that was captured by the UV sensor. The UV sensor is preferably connected to electronics and in particular to a control unit that evaluates the electrical signals generated by the UV sensor and, based on this, carries out the described method and assesses whether ignition conditions exist.
Durch die beschriebene Methode zur Erkennung von Zündbedingungen (der Entstehung des Zündfunkens) mit Hilfe des UV-Sensors kann erkannt werden, ob mangelhafte Zündbedingungen oder ob mangelhafte Umgebungsbedingungen Ursache für das Nichterfolgen der Zündung sind.The described method for detecting ignition conditions (the creation of the ignition spark) using the UV sensor can be used to determine whether inadequate ignition conditions or inadequate ambient conditions are the reason for the failure of ignition.
Dies ist insbesondere sehr vorteilhaft, wenn das Verfahren in einem Brenner zur Verbrennung von Wasserstoff verwendet wird, denn eine teilweise ausgesetzte oder verspätete Zündung ist insbesondere bei der Verbrennung von Wasserstoff problematisch.This is particularly advantageous when the process is used in a burner for the combustion of hydrogen, because partially suspended or delayed ignition is particularly problematic in the combustion of hydrogen.
Eine verspätete Zündung kann insbesondere bei der Verbrennung von Wasserstoff zu schlagartigen Verbrennungen bzw. Verpuffungen führen, die häufig Geräusche, Knallgeräusche oder sogar Flammrückschläge zurück in den Brenner bewirken können.Delayed ignition can lead to sudden combustion or deflagration, particularly when hydrogen is burned, which can often cause noises, bangs or even flashbacks of flames back into the burner.
Darüber hinaus vorteilhaft ist, wenn der UV-Sensor außerhalb eines Brennbereichs oberhalb einer Brenneroberfläche angeordnet ist und eine schräge Blickrichtung aufweist, die im Zündbereich der Zündeinrichtung auf die Brenneroberfläche ausgerichtet ist.Furthermore, it is advantageous if the UV sensor is arranged outside a combustion area above a burner surface and has an oblique viewing direction which is aligned with the burner surface in the ignition area of the ignition device.
Durch diese Anordnung des UV-Sensors kann der UV-Sensor so angeordnet werden, dass die durch die Verbrennung erzeugten Temperaturen sich nicht so stark auf den UV-Sensor auswirken und diesen nicht so stark beeinträchtigen. Gleichzeitig ist der UV-Sensor so positioniert, dass ein Zündfunke gut erkannt werden kann.This arrangement of the UV sensor allows the UV sensor to be positioned in such a way that the temperatures generated by combustion do not have such a strong effect on the UV sensor and do not impair it as much. At the same time, the UV sensor is positioned in such a way that an ignition spark can be easily detected.
Auch vorteilhaft ist, wenn dann, wenn keine geeigneten Zündbedingungen erkannt werden, eine Versorgung des Brenners mit Gas unterbrochen wird.It is also advantageous if the gas supply to the burner is interrupted if no suitable ignition conditions are detected.
So kann sichergestellt werden, dass sich kein unverbranntes Gemisch im Brennraum sammeln kann.This ensures that no unburned mixture can collect in the combustion chamber.
Des Weiteren vorteilhaft ist, wenn die Zündeinrichtung eine Zündelektrode aufweist.It is also advantageous if the ignition device has an ignition electrode.
Eine Zündelektrode umfasst vorzugsweise zwei Zündkontakte, die voneinander beabstandet sind und zwischen denen sich ein Lichtbogen ausbildet, wenn eine elektrische Spannung an die Kontakte angelegt werden kann. Bevorzugt erfolgt die Bestromung der Zündkontakte der Zündelektrode immer sehr kurzzeitig bspw. über einen Zündkondensator, der sich schlagartig entlädt. So können hohe elektrische Spannungen und Ströme und damit auch starke Zündfunken erzeugt werden.An ignition electrode preferably comprises two ignition contacts that are spaced apart from one another and between which an arc forms when an electrical voltage can be applied to the contacts. The ignition contacts of the ignition electrode are preferably always supplied with current for a very short time, for example via an ignition capacitor that discharges suddenly. In this way, high electrical voltages and currents and thus also strong ignition sparks can be generated.
Außerdem vorteilhaft ist, wenn das mit der Flamme verbrannte Gas zumindest 50%, bevorzugt sogar mindestens 97% Wasserstoff enthält.It is also advantageous if the gas burned with the flame contains at least 50%, preferably at least 97% hydrogen.
Ein Anteil von 50% oder mehr Wasserstoff bewirkt ein Brenngas, dessen Eigenschaften schon wesentlich vom Wasserstoff dominiert werden. Ein Gas mit 97% oder mehr Wasserstoff kann annähernd wie reiner Wasserstoff betrachtet werden.A proportion of 50% or more hydrogen results in a fuel gas whose properties are already largely dominated by hydrogen. A gas with 97% or more hydrogen can be considered almost like pure hydrogen.
Hier auch beschrieben werden soll ein Brenner zur Verbrennung von Gas mit einer Zündeinrichtung zur Erzeugung eines Zündfunkens und mit mindestens einem UV-Sensor, wobei der Brenner zur Durchführung des beschriebenen Verfahrens eingerichtet ist.Also to be described here is a burner for combustion of gas with an ignition device for generating an ignition spark and with at least one UV sensor, wherein the burner is designed to carry out the described method.
Außerdem beschrieben werden soll ein Steuergerät, eingerichtet zur Auswertung von Signalen von mindestens einem UV-Sensor eines Brenners gemäß dem beschriebenen Verfahren.Also to be described is a control device configured to evaluate signals from at least one UV sensor of a burner according to the described method.
Darüber hinaus beschrieben werden soll ein Computerprogramm, umfassend Befehle, die bewirken, dass der beschriebene Brenner die beschriebenen Verfahrensschritte ausführt.In addition, a computer program is to be described, comprising commands which cause the described burner to carry out the described method steps.
Die Erfindung sowie das technische Umfeld der Erfindung werden nachfolgend anhand der Figur näher erläutert. Die Figuren zeigen bevorzugte Ausführungsbeispiele, auf welche die Erfindung nicht beschränkt ist. Es ist insbesondere darauf hinzuweisen, dass die Figuren und insbesondere die in den Figuren dargestellten Größenverhältnisse nur schematisch sind. :The invention and the technical environment of the invention are explained in more detail below with reference to the figure. The figures show preferred embodiments to which the invention is not limited. It should be noted in particular that the figures and in particular the proportions shown in the figures are only schematic. :
Es stellen dar:
- Figur 1:
- einen beschriebenen Brenner für das beschriebene Verfahren
- Figure 1:
- a described burner for the described process
Bevorzugt sind der UV-Sensor 5 und die Zündeinrichtung 3 an ein Steuergerät 11 angeschlossen, welches die Zündeinrichtung 3 unter Verwertung der Signale des UV-Sensors 5 ansteuert. Bevorzugt ist das Steuergerät 11 ebenfalls an ein Versorgungsventil 15 an der Versorgungsleitung 14 angeschlossen, mit welchem die Versorgung des Brenners 2 mit Gas bzw. mit Gemisch aus Gas und Luft gesteuert werden kann.Preferably, the
- 11
- Flammeflame
- 22
- Brennerburner
- 33
- Zündeinrichtungignition device
- 44
- Zündfunkeignition spark
- 55
- UV-SensorUV sensor
- 66
- Brennbereichburning area
- 77
- Brenneroberflächeburner surface
- 88
- Blickrichtungviewing direction
- 99
- Zündbereichignition range
- 1010
- Zündelektrodeignition electrode
- 1111
- SteuergerätControl unit
- 1212
- Brennraumcombustion chamber
- 1313
- Innenrauminterior
- 1414
- Versorgungsleitungsupply line
- 1515
- Versorgungsventilsupply valve
Claims (8)
- Method for monitoring the ignition of a flame (1) of a burner (2) for burning gas with an ignition apparatus (3) for generating an ignition spark (4), wherein a UV-sensor (5) is used in order to ascertain UV-emissions of the ignition spark (4) and to use this to discern whether by means of the ignition spark (4) ignition conditions have been created, characterised in that in addition it is monitored whether the ignition of the flame (1) of the burner (2) takes place and then, when it has been detected using the UV-sensor (5) that by means of the ignition spark suitable ignition conditions have been created, but there is no ignition of the flame (1), at least one unsuitable ambient condition for the ignition of the flame (1) is diagnosed, wherein the at least one unsuitable ambient condition comprises a mix ratio of gas and air externally to a predetermined region.
- Method according to the preceding claim, wherein the UV-sensor (5) is arranged externally to a combustion region (6) above a burner surface (7) and has an oblique viewing angle (8) which is aligned onto the burner surface (7) in the ignition region (9) of the ignition apparatus (3).
- Method according to any of the preceding claims wherein if no new suitable ignition conditions are detected, a supply of the burner (2) gas is interrupted.
- Method according to any of the preceding claims, wherein the ignition apparatus (3) has an ignition electrode (10).
- Method according to any of the preceding claims wherein the gas burnt with the flame (1) contains at least 50%, preferably even at least 97% hydrogen.
- Control device (11) for a burner (2) with an ignition apparatus (3) for generating an ignition spark (4) and with at least one UV-sensor (5), wherein the control device is configured to evaluate signals of the UV-sensor (5) according to the method according to any one of claims 1 to 5.
- Burner (2) for burning gas using an ignition apparatus (3) for generating an ignition spark (4), with at least one UV-sensor (5) and with a control device according to claim 6.
- Computer program comprising commands which have the effect that, when it is run on a control device (11) of a burner (2) with an ignition apparatus (3) for generating an ignition spark (4) and with at least one UV-sensor (5), the control device (11) carries out the method steps according to any one of claims 1 to 5.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021124663.6A DE102021124663A1 (en) | 2021-09-23 | 2021-09-23 | Method of monitoring the ignition of a flame of a burner |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP4155610A1 EP4155610A1 (en) | 2023-03-29 |
| EP4155610C0 EP4155610C0 (en) | 2024-10-02 |
| EP4155610B1 true EP4155610B1 (en) | 2024-10-02 |
Family
ID=83319084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22195317.7A Active EP4155610B1 (en) | 2021-09-23 | 2022-09-13 | Method for monitoring the ignition of a burner flame |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4155610B1 (en) |
| DE (1) | DE102021124663A1 (en) |
| ES (1) | ES2993543T3 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3574496A (en) * | 1969-07-11 | 1971-04-13 | Honeywell Inc | Direct spark igniter combustion safeguard apparatus |
| JPS6082720A (en) * | 1983-10-13 | 1985-05-10 | Osaka Gas Co Ltd | Burner controller |
| EP3669121A1 (en) * | 2017-07-18 | 2020-06-24 | ClearSign Technologies Corporation | Control system for a burner with perforated flame holder |
| DE102020114044A1 (en) | 2020-05-26 | 2021-12-02 | Vaillant Gmbh | Method and device for the detection of errors when igniting a burner with a fan for the supply of air and a fuel valve |
-
2021
- 2021-09-23 DE DE102021124663.6A patent/DE102021124663A1/en active Pending
-
2022
- 2022-09-13 ES ES22195317T patent/ES2993543T3/en active Active
- 2022-09-13 EP EP22195317.7A patent/EP4155610B1/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP4155610C0 (en) | 2024-10-02 |
| EP4155610A1 (en) | 2023-03-29 |
| ES2993543T3 (en) | 2025-01-02 |
| DE102021124663A1 (en) | 2023-03-23 |
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