EP0657693A2 - Gasburner - Google Patents

Gasburner Download PDF

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Publication number
EP0657693A2
EP0657693A2 EP94117819A EP94117819A EP0657693A2 EP 0657693 A2 EP0657693 A2 EP 0657693A2 EP 94117819 A EP94117819 A EP 94117819A EP 94117819 A EP94117819 A EP 94117819A EP 0657693 A2 EP0657693 A2 EP 0657693A2
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EP
European Patent Office
Prior art keywords
injector
gas
nozzle bore
nozzle
closure element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP94117819A
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German (de)
French (fr)
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EP0657693B1 (en
EP0657693A3 (en
Inventor
Roman Nagorski
Reinhold Brüggemann
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.)
GoGaS Goch GmbH and Co KG
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GoGaS Goch GmbH and Co KG
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Publication of EP0657693A2 publication Critical patent/EP0657693A2/en
Publication of EP0657693A3 publication Critical patent/EP0657693A3/en
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Classifications

    • 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
    • F23D14/62—Mixing devices; Mixing tubes
    • F23D14/64—Mixing devices; Mixing tubes with injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/14—Special features of gas burners
    • F23D2900/14642—Special features of gas burners with jet mixers with more than one gas injection nozzles or orifices for a single mixing tube
    • 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
    • F23N2235/24—Valve details

Definitions

  • the invention relates to a gas burner with an injector and a gas nozzle arranged in front of the injector and having a main nozzle bore directed against the injector.
  • the gas is blown into the injector, which entrains all of the combustion air or only a portion of the primary air.
  • the burners are usually operated in two power levels, namely one with nominal power and one with power reduced to around 50%. Switching takes place by lowering the gas pressure.
  • the burners are designed so that they operate at the lower limit of the permissible air ratio at low gas pressure. The result is that the air ratio increases significantly at full power, which reduces the efficiency of the burner. There is also poor ignition behavior at low temperatures.
  • the ratio of the low power level to the nominal power which requires a gas pressure ratio of 1: 4, cannot be reduced below 50%.
  • the invention has for its object to provide a gas burner of the type mentioned with improved controllability.
  • the gas burner according to the invention is characterized in that the gas nozzle has at least one secondary nozzle bore directed against the injector, which is aligned at an angle to the axis of the injector and has a cross section which is preferably smaller than that of the main nozzle bore, and in that the main nozzle bore is assigned a movable closure element between an open and a closed position.
  • the main nozzle bore is open so that the gas flows from both nozzle bores into the injector. If you want to switch to the lower power level, the main nozzle bore is closed. Now only a smaller amount of gas gets into the injector, namely that which emerges from the secondary nozzle bore. The impulse, however, that although reduced, it is still much too high since the gas pressure is not reduced. However, the air ratio does not increase excessively because the secondary nozzle bore is oriented at an angle to the axis of the injector. The gas jet from the secondary nozzle bore does not therefore enter the injector axially, but strikes the side of the inner wall of the injector and consequently pulls less air into the injector.
  • This effect can be increased by an air screen that covers the edge of the injector inlet opening in a ring.
  • Another important advantage of the invention is to emphasize that the pressure that is the same for both power levels can be kept at a relatively low level, namely approximately at the level at which the low power level of the known injector burner controlled by gas pressure operates.
  • the control range which is determined by the cross sections of the nozzle bores, can easily go from 100% to about 40%, with the same cross sections up to about 50%.
  • the air ratio of the lower stage is determined by the inclination of the secondary nozzle bore. The burner's efficiency remains almost constant over the entire control range.
  • the closure element can be moved back and forth in a clocked manner between the open and the closed position. This opens up the possibility of setting any power level between the nominal power and the reduced power specified by the secondary nozzle bore by selecting the clock frequency.
  • the air ratio will always remain in the range that is determined on the one hand by the maximum and on the other hand by the minimum power level.
  • the closure element is arranged in the interior of the gas nozzle and is designed as a pin which sits on a guide body provided with gas passage openings.
  • the guide body is used to align the spigot with the main nozzle bore.
  • the gas passage openings are effective regardless of whether the main nozzle bore is open or closed.
  • the guide body can preferably be moved into the closed position of the pin by an electromagnet arranged on the outside of the gas nozzle against the action of a return spring.
  • This control is simple and effective. Above all, it is particularly suitable for intermittent operation.
  • a burner tube 2 which merges into an injector 3.
  • a gas nozzle 4 In front of the injector is a gas nozzle 4, from which the gas is blown into the injector, taking at least part of the combustion air with it.
  • the gas nozzle 4 then has a main nozzle bore 5 which directs an axial gas jet into the injector 3. Furthermore, an auxiliary nozzle bore 6 is provided, which is inclined at an angle ⁇ to the axis of the injector 3 and has a cross section that is smaller than that of the main nozzle bore 5.
  • a closure element 7 which consists of a pin 8 and a guide body 9.
  • the latter centers the pin 8 on the main nozzle bore 5.
  • the guide body 9 has gas passage openings 10, which provide an adequate supply of the two nozzle bores guarantee.
  • an electromagnet 11 is provided on the outside of the gas nozzle 4.
  • the closure element moves against the action of a return spring 12 to the right in Fig. 2 that the pin 8 closes the main nozzle bore 5.
  • both nozzle holes are open.
  • the closure element 7 is actuated via the electromagnet 11, so that the pin 8 closes the main nozzle bore 5. Gas can now only enter the injector from the thinner secondary nozzle bore 6. However, this happens at almost undiminished speed and a correspondingly high momentum, since the gas pressure is kept constant.
  • a comparatively low gas pressure can be used.
  • Another significant advantage can be achieved in that the movement of the closure element 7 is clocked. This offers the possibility of setting any power level between the nominal power and the reduced power defined by the secondary nozzle bore 6 by selecting the clock frequency, and without having a negative influence on the air ratio.
  • the gas nozzle 4 can also be equipped with a plurality of main nozzle bores 5, each of which is independent be opened and closed from each other to enable several control levels if you do not want to work in cyclical mode.
  • the locking mechanism shown for the main nozzle bore is also only one embodiment, albeit a particularly advantageous one.
  • the secondary nozzle bore can also have a cross section which is larger than that of the main nozzle bore. The burner then works with a shortened control range, but otherwise achieves the advantages according to the invention.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles For Spraying Of Liquid Fuel (AREA)
  • Gas Burners (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)

Abstract

The gas burner has an injector (3) and a gas nozzle (4) arranged in front of the injector, the gas nozzle being provided with a main nozzle bore (5) and a subsidiary nozzle bore (6). Both nozzle bores are directed towards the injector, but the subsidiary nozzle bore at an angle ( alpha ) in relation to the injector axis. The main nozzle bore (5) is assigned a closure element (7) which closes the main nozzle bore when the burner is to be run at reduced output. Given a constant gas pressure, a reduced quantity of gas then flows out of the subsidiary nozzle bore (6), the pulse which is still high being compensated for by the inclination of this nozzle bore. This limits the rise of the air ratio in the case of a reduction in the output. Clocking of the closure element (7) enables the setting of intermediate output stages. <IMAGE>

Description

Die Erfindung betrifft einen Gasbrenner mit einem Injektor und einer vor dem Injektor angeordneten Gasdüse, die eine gegen den Injektor gerichtete Hauptdüsenbohrung aufweist.The invention relates to a gas burner with an injector and a gas nozzle arranged in front of the injector and having a main nozzle bore directed against the injector.

Bei derartigen atmosphärischen Brennern, wie sie aus der Praxis bekannt sind, wird das Gas in den Injektor eingeblasen, wobei es die gesamte Verbrennungsluft oder aber auch nur einen Primärluftanteil mitreißt. Die Brenner werden in der Regel in zwei Leistungsstufen betrieben, nämlich einmal bei Nennleistung und einmal bei auf etwa 50% reduzierter Leistung. Das Umschalten erfolgt durch Absenken des Gasdrucks. Die Brenner werden so ausgelegt, daß sie bei niedrigem Gasdruck gerade an der unteren Grenze der zulässigen Luftzahl arbeiten. Die Folge ist, daß die Luftzahl bei voller Leistung erheblich ansteigt, wodurch der Wirkungsgrad des Brenners sinkt. Auch ergibt sich ein schlechtes Zündverhalten bei niedrigen Temperaturen. Das Verhältnis der niedrigen Leistungsstufe zur Nennleistung, das ein Gasdruckverhältnis von 1:4 voraussetzt, läßt sich nicht unter 50% absenken.In the case of atmospheric burners of this type, as are known from practice, the gas is blown into the injector, which entrains all of the combustion air or only a portion of the primary air. The burners are usually operated in two power levels, namely one with nominal power and one with power reduced to around 50%. Switching takes place by lowering the gas pressure. The burners are designed so that they operate at the lower limit of the permissible air ratio at low gas pressure. The result is that the air ratio increases significantly at full power, which reduces the efficiency of the burner. There is also poor ignition behavior at low temperatures. The ratio of the low power level to the nominal power, which requires a gas pressure ratio of 1: 4, cannot be reduced below 50%.

Der Erfindung liegt die Aufgabe zugrunde, einen Gasbrenner der eingangs genannten Art mit verbesserter Regelbarkeit zu schaffen.The invention has for its object to provide a gas burner of the type mentioned with improved controllability.

Zur Lösung dieser Aufgabe ist der Gasbrenner nach der Erfindung dadurch gekennzeichnet, daß die Gasdüse mindestens eine gegen den Injektor gerichtete Nebendüsenbohrung aufweist, die im Winkel zur Achse des Injektors ausgerichtet ist und einen Querschnitt hat, der vorzugsweise kleiner als der der Hauptdüsenbohrung ist, und daß der Hauptdüsenbohrung ein zwischen einer Öffnungs- und einer Schließstellung bewegbares Verschlußelement zugeordnet ist.To achieve this object, the gas burner according to the invention is characterized in that the gas nozzle has at least one secondary nozzle bore directed against the injector, which is aligned at an angle to the axis of the injector and has a cross section which is preferably smaller than that of the main nozzle bore, and in that the main nozzle bore is assigned a movable closure element between an open and a closed position.

Beim Vollastbetrieb ist die Hauptdüsenbohrung geöffnet, so daß das Gas aus beiden Düsenbohrungen in den Injektor strömt. Soll auf die niedrigere Leistungsstufe umgeschaltet werden, so wird die Hauptdüsenbohrung geschlossen. Nun gelangt nur noch eine geringere Gasmenge in den Injektor, nämlich diejenige, die aus der Nebendüsenbohrung austritt. Der Impuls allerdings, der sich zwar verringert, ist aber nach wie vor viel zu hoch, da der Gasdruck nicht reduziert wird. Allerdings kommt es dennoch nicht zu einer übermäßigen Erhöhung der Luftzahl, weil die Nebendüsenbohrung im Winkel zur Achse des Injektors ausgerichtet ist. Der Gasstrahl aus der Nebendüsenbohrung tritt also nicht axial in den Injektor ein, sondern trifft seitlich auf die Innenwand des Injektors und reißt folglich weniger Luft mit sich in den Injektor hinein.At full load, the main nozzle bore is open so that the gas flows from both nozzle bores into the injector. If you want to switch to the lower power level, the main nozzle bore is closed. Now only a smaller amount of gas gets into the injector, namely that which emerges from the secondary nozzle bore. The impulse, however, that although reduced, it is still much too high since the gas pressure is not reduced. However, the air ratio does not increase excessively because the secondary nozzle bore is oriented at an angle to the axis of the injector. The gas jet from the secondary nozzle bore does not therefore enter the injector axially, but strikes the side of the inner wall of the injector and consequently pulls less air into the injector.

Dieser Effekt kann noch durch eine Luftblende erhöht werden, die den Rand der Injektor-Einlaßöffnung ringförmig abdeckt.This effect can be increased by an air screen that covers the edge of the injector inlet opening in a ring.

Als weiterer wesentlicher Vorteil der Erfindung ist hervorzuheben, daß der für beide Leistungsstufen gleiche Druck auf relativ niedrigem Niveau gehalten werden kann, nämlich ungefähr auf demjenigen Niveau, auf dem die niedrige Leistungsstufe des bekannten, über den Gasdruck gesteuerten Injektorbrenners arbeitet. Der Regelbereich, der durch die Querschnitte der Düsenbohrungen bestimmt wird, kann ohne weiteres von 100% bis etwa 40% gehen, bei gleichen Querschnitten bis ca. 50%. Die Luftzahl der unteren Stufe wird durch die Neigung der Nebendüsenbohrung bestimmt. Der Wirkungsgrad des Brenners bleibt über dem gesamten Regelbereich annähernd konstant.Another important advantage of the invention is to emphasize that the pressure that is the same for both power levels can be kept at a relatively low level, namely approximately at the level at which the low power level of the known injector burner controlled by gas pressure operates. The control range, which is determined by the cross sections of the nozzle bores, can easily go from 100% to about 40%, with the same cross sections up to about 50%. The air ratio of the lower stage is determined by the inclination of the secondary nozzle bore. The burner's efficiency remains almost constant over the entire control range.

In wesentlicher Weiterbildung der Erfindung wird vorgeschlagen, daß das Verschlußelement zwischen der Öffnungs- und der Schließstellung getaktet hin und her bewegbar ist. Dadurch wird die Möglichkeit eröffnet, durch die Wahl der Taktfrequenz jede beliebige Leistungsstufe zwischen der Nennleistung und der durch die Nebendüsenbohrung vorgegebenen reduzierten Leistung einzustellen. Dabei wird sich die Luftzahl immer in demjenigen Bereich halten, der einerseits durch die maximale und andererseits durch die minimale Leistungsstufe bestimmt ist.In a further development of the invention it is proposed that the closure element can be moved back and forth in a clocked manner between the open and the closed position. This opens up the possibility of setting any power level between the nominal power and the reduced power specified by the secondary nozzle bore by selecting the clock frequency. The air ratio will always remain in the range that is determined on the one hand by the maximum and on the other hand by the minimum power level.

Bei einer konstruktiv besonders vorteilhaften Ausführungsform des Gasbrenners ist das Verschlußelement im Inneren der Gasdüse angeordnet und als Zapfen ausgebildet, der an einem mit Gasdurchtrittsöffnungen versehenen Führungskörper sitzt. Der Führungskörper dient dazu, den Zapfen auf die Hauptdüsenbohrung auszurichten. Die Gasdurchtrittsöffnungen sind unabhängig davon wirksam, ob die Hauptdüsenbohrung geöffnet oder geschlossen ist.In a structurally particularly advantageous embodiment of the gas burner, the closure element is arranged in the interior of the gas nozzle and is designed as a pin which sits on a guide body provided with gas passage openings. The guide body is used to align the spigot with the main nozzle bore. The gas passage openings are effective regardless of whether the main nozzle bore is open or closed.

Vorzugsweise ist der Führungskörper von einem außen auf der Gasdüse angeordneten Elektromagneten gegen die Wirkung einer Rückstellfeder in die Schließstellung des Zapfens bewegbar. Diese Steuerung ist einfach und effektiv. Vor allen Dingen eignet sie sich besonders gut für den Taktbetrieb.The guide body can preferably be moved into the closed position of the pin by an electromagnet arranged on the outside of the gas nozzle against the action of a return spring. This control is simple and effective. Above all, it is particularly suitable for intermittent operation.

Als erfindungswesentlich offenbart gelten auch solche Kombinationen der erfindungsgemäßen Merkmale, die von den vorstehend diskutierten Verknüpfungen abweichen.Combinations of the features according to the invention which differ from the links discussed above are also considered to be disclosed as essential to the invention.

Die Erfindung wird im folgenden anhand eines bevorzugten Ausführungsbeispiels im Zusammenhang mit der beiliegenden Zeichnung näher erläutert. Die Zeichnung zeigt in:

Fig. 1
eine schematische Darstellung eines atmosphärischen Gasbrenners nach der Erfindung;
Fig. 2
in vergrößertem Maßstab einen axialen Schnitt durch einen Teil von Fig. 1.
The invention is explained below with reference to a preferred embodiment in connection with the accompanying drawings. The drawing shows in:
Fig. 1
is a schematic representation of an atmospheric gas burner according to the invention;
Fig. 2
on an enlarged scale an axial section through a part of FIG. 1st

Der Gasbrenner nach Fig. 1 weist ein Brennerrohr 2 auf, welches in einen Injektor 3 übergeht. Vor dem Injektor befindet sich eine Gasdüse 4, aus der das Gas unter Mitnahme mindestens eines Teils der Verbrennungsluft in den Injektor eingeblasen wird.1 has a burner tube 2 which merges into an injector 3. In front of the injector is a gas nozzle 4, from which the gas is blown into the injector, taking at least part of the combustion air with it.

Fig. 2 zeigt in vergrößertem Maßstab einen Schnitt durch den Injektorbereich des Brenners. Danach weist die Gasdüse 4 eine Hauptdüsenbohrung 5 auf, die einen axialen Gasstrahl in den Injektor 3 richtet. Ferner ist eine Nebendüsenbohrung 6 vorgesehen, die unter einem Winkel α zur Achse des Injektors 3 geneigt ist und einen Querschnitt hat, der kleiner als der der Hauptdüsenbohrung 5 ist.2 shows a section through the injector area of the burner on an enlarged scale. The gas nozzle 4 then has a main nozzle bore 5 which directs an axial gas jet into the injector 3. Furthermore, an auxiliary nozzle bore 6 is provided, which is inclined at an angle α to the axis of the injector 3 and has a cross section that is smaller than that of the main nozzle bore 5.

Im Inneren der Gasdüse 4 befindet sich ein Verschlußelement 7, das aus einem Zapfen 8 und einem Führungskörper 9 besteht. Letzterer zentriert den Zapfen 8 auf die Hauptdüsenbohrung 5. Außerdem weist der Führungskörper 9 Gasdurchtrittsöffnungen 10 auf, die eine ausreichende Versorgung der beiden Düsenbohrungen gewährleisten.Inside the gas nozzle 4 there is a closure element 7, which consists of a pin 8 and a guide body 9. The latter centers the pin 8 on the main nozzle bore 5. In addition, the guide body 9 has gas passage openings 10, which provide an adequate supply of the two nozzle bores guarantee.

Zur Betätigung des Verschlußelementes 7 ist außen auf der Gasdüse 4 ein Elektromagnet 11 vorgesehen. Bei dessen Erregung wandert das Verschlußelement gegen die Wirkung einer Rückstellfeder 12 soweit nach rechts in Fig. 2, daß der Zapfen 8 die Hauptdüsenbohrung 5 verschließt. Wenn der Gasbrenner mit voller Leistung betrieben wird, sind beide Düsenbohrungen offen. Beim Umschalten auf reduzierte Leistung wird über den Elektromagneten 11 das Verschlußelement 7 betätigt, so daß der Zapfen 8 die Hauptdüsenbohrung 5 verschließt. Gas kann nun nur noch aus der dünneren Nebendüsenbohrung 6 in den Injektor eintreten. Dies geschieht allerdings mit fast unverminderter Geschwindigkeit und entsprechend hohem Impuls, da der Gasdruck konstant gehalten wird. Ein übermäßiges Ansteigen der Luftzahl tritt dennoch nicht auf, weil der aus der Nebendüsenbohrung 6 kommende Gasstrahl nicht axial in den Injektor 3 gelangt, sondern zu dessen Achse um den Winkel α geneigt ist. Der Gasstrahl trifft daher auf die Innenwand des Injektors, so daß er nur eine verminderte Luftmenge in diesen eintragen kann. Dieser Effekt wird unterstützt durch eine Luftblende 13, die den Rand der Einlaßöffnung des Injektors 3 ringförmig abdeckt.To actuate the closure element 7, an electromagnet 11 is provided on the outside of the gas nozzle 4. When excited, the closure element moves against the action of a return spring 12 to the right in Fig. 2 that the pin 8 closes the main nozzle bore 5. When the gas burner is operated at full power, both nozzle holes are open. When switching to reduced power, the closure element 7 is actuated via the electromagnet 11, so that the pin 8 closes the main nozzle bore 5. Gas can now only enter the injector from the thinner secondary nozzle bore 6. However, this happens at almost undiminished speed and a correspondingly high momentum, since the gas pressure is kept constant. However, an excessive increase in the air ratio does not occur because the gas jet coming from the secondary nozzle bore 6 does not reach the injector 3 axially, but rather is inclined to the axis thereof by the angle α. The gas jet therefore hits the inner wall of the injector so that it can only enter a reduced amount of air into it. This effect is supported by an air screen 13, which covers the edge of the inlet opening of the injector 3 in a ring.

Aufgrund der erfindungsgemäßen Anordnung der Düsenbohrungen kann mit vergleichsweise niedrigem Gasdruck gearbeitet werden. Ein weiterer wesentlicher Vorteil läßt sich dadurch erzielen, daß die Bewegung des Verschlußelementes 7 getaktet wird. Dies bietet die Möglichkeit, durch Wahl der Taktfrequenz jede beliebige Leistungsstufe zwischen der Nennleistung und der durch die Nebendüsenbohrung 6 definierten reduzierten Leistung einzustellen, und zwar ohne negativen Einfluß auf die Luftzahl.Due to the arrangement of the nozzle bores according to the invention, a comparatively low gas pressure can be used. Another significant advantage can be achieved in that the movement of the closure element 7 is clocked. This offers the possibility of setting any power level between the nominal power and the reduced power defined by the secondary nozzle bore 6 by selecting the clock frequency, and without having a negative influence on the air ratio.

Im Rahmen der Erfindung sind durchaus Abwandlungsmöglichkeiten gegeben. So können ohne weiteres mehrere Nebendüsenbohrungen 6 vorgesehen werden, wobei deren Winkel gegenüber der Injektorachse unterschiedlich sein kann. Auch läßt sich die Gasdüse 4 mit mehreren Hauptdüsenbohrungen 5 ausrüsten, die jeweils unabhängig voneinander geöffnet und geschlossen werden, um mehrere Regelstufen zu ermöglichen, falls nicht im Taktbetrieb gearbeitet werden soll. Auch der dargestellte Verschlußmechanismus für die Hauptdüsenbohrung stellt lediglich ein Ausführungsbeispiel dar, wenn auch ein besonders vorteilhaftes. Ggf. kann die Nebendüsenbohrung auch einen Querschnitt aufweisen, der größer als der der Hauptdüsenbohrung ist. Der Brenner arbeitet dann mit verkürztem Regelbereich, im übrigen aber unter Erzielung der erfindungsgemäßen Vorteile.In the context of the invention, there are quite a number of possible modifications. Thus, several secondary nozzle bores 6 can easily be provided, the angle of which can be different with respect to the injector axis. The gas nozzle 4 can also be equipped with a plurality of main nozzle bores 5, each of which is independent be opened and closed from each other to enable several control levels if you do not want to work in cyclical mode. The locking mechanism shown for the main nozzle bore is also only one embodiment, albeit a particularly advantageous one. Possibly. the secondary nozzle bore can also have a cross section which is larger than that of the main nozzle bore. The burner then works with a shortened control range, but otherwise achieves the advantages according to the invention.

Claims (5)

Gasbrenner (1) mit einem Injektor (3) und einer vor dem Injektor angeordneten Gasdüse (4), die eine gegen den Injektor gerichtete Hauptdüsenbohrung (5) aufweist,
   dadurch gekennzeichnet,
   daß die Gasdüse (4) mindestens eine gegen den Injektor (3) gerichtete Nebendüsenbohrung (6) aufweist, die im Winkel (α) zur Achse des Injektors ausgerichtet ist und einen Querschnitt hat, der vorzugsweise kleiner als der der Hauptdüsenbohrung (5) ist, und daß der Hauptdüsenbohrung ein zwischen einer Öffnungs- und einer Schließstellung bewegbares Verschlußelement (7) zugeordnet ist.Gas burner (1) with an injector (3) and a gas nozzle (4) arranged in front of the injector and having a main nozzle bore (5) directed towards the injector,
characterized,
that the gas nozzle (4) has at least one secondary nozzle bore (6) directed against the injector (3), which is aligned at an angle (α) to the axis of the injector and has a cross section which is preferably smaller than that of the main nozzle bore (5), and in that the main nozzle bore is assigned a closure element (7) which can be moved between an open and a closed position. Gasbrenner nach Anspruch 1, dadurch gekennzeichnet, daß der Injektor (3) eine Luftblende (13) aufweist, die den Rand seiner Einlaßöffnung ringförmig abdeckt.Gas burner according to claim 1, characterized in that the injector (3) has an air screen (13) which covers the edge of its inlet opening in a ring. Gasbrenner nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Verschlußelement (7) zwischen der Öffnungs- und der Schließstellung getaktet hin und her bewegbar ist.Gas burner according to Claim 1 or 2, characterized in that the closure element (7) can be moved back and forth in a clocked manner between the open and the closed position. Gasbrenner nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Verschlußelement (7) im Inneren der Gasdüse (4) angeordnet ist und einen Zapfen (7) aufweist, der an einem mit Gasdurchtrittsöffnungen (10) versehenen Führungskörper (9) sitzt.Gas burner according to one of claims 1 to 3, characterized in that the closure element (7) is arranged in the interior of the gas nozzle (4) and has a pin (7) which sits on a guide body (9) provided with gas passage openings (10). Gasbrenner nach Anspruch 4, dadurch gekennzeichnet, daß der Führungskörper (9) von einem außen auf der Gasdüse (4) angeordneten Elektromagneten (11) gegen die Wirkung einer Rückstellfeder (12) in die Schließstellung des Zapfens (7) bewegbar ist.Gas burner according to Claim 4, characterized in that the guide body (9) can be moved into the closed position of the pin (7) by an electromagnet (11) arranged on the outside of the gas nozzle (4) against the action of a return spring (12).
EP94117819A 1993-12-09 1994-11-11 Gasburner Expired - Lifetime EP0657693B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4341997A DE4341997A1 (en) 1993-12-09 1993-12-09 Gas burner
DE4341997 1993-12-09

Publications (3)

Publication Number Publication Date
EP0657693A2 true EP0657693A2 (en) 1995-06-14
EP0657693A3 EP0657693A3 (en) 1996-03-20
EP0657693B1 EP0657693B1 (en) 1998-01-21

Family

ID=6504576

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94117819A Expired - Lifetime EP0657693B1 (en) 1993-12-09 1994-11-11 Gasburner

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EP (1) EP0657693B1 (en)
DE (2) DE4341997A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0908670A1 (en) * 1997-10-06 1999-04-14 Robert Bosch Gmbh Method and device for operating an atmospheric gas burner
WO2007017056A1 (en) * 2005-08-11 2007-02-15 Elster Gmbh Industrial burner and method for operating an industrial burner
DE10005256B4 (en) * 2000-02-05 2010-04-29 Elster Gmbh Burner for gaseous or liquid fuels
US8062027B2 (en) 2005-08-11 2011-11-22 Elster Gmbh Industrial burner and method for operating an industrial burner
EP2957831A1 (en) * 2014-06-18 2015-12-23 Robert Bosch Gmbh Burner and method for operating same
EP3086038A1 (en) * 2015-04-22 2016-10-26 Whirlpool Corporation Appliance with electronically-controlled gas flow to burners

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19629966C2 (en) * 1996-07-25 2001-02-22 Ruhrgas Ag Process for controlling the primary air content of an atmospheric gas burner and device for carrying out the process
DE19724861C1 (en) * 1997-06-12 1998-10-15 Stiebel Eltron Gmbh & Co Kg Gas burner especially used in domestic boiler

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US3829279A (en) * 1973-08-20 1974-08-13 Modine Mfg Co Dual fuel burner apparatus
EP0213021A1 (en) * 1985-07-25 1987-03-04 SAUNIER DUVAL EAU CHAUDE CHAUFFAGE S.D.E.C.C. - Société anonyme Double injection device for a pilot light for gas installations
GB2201506A (en) * 1987-02-21 1988-09-01 Bullfinch Gas fuelled combustion appliance
EP0489720A2 (en) * 1982-12-10 1992-06-10 Krieger Corporation Method and apparatus for uniformly drying moving webs

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WO1989007898A1 (en) * 1988-02-29 1989-09-08 Braun Aktiengesellschaft Gas-operated appliance for personal use

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Publication number Priority date Publication date Assignee Title
US3829279A (en) * 1973-08-20 1974-08-13 Modine Mfg Co Dual fuel burner apparatus
EP0489720A2 (en) * 1982-12-10 1992-06-10 Krieger Corporation Method and apparatus for uniformly drying moving webs
EP0213021A1 (en) * 1985-07-25 1987-03-04 SAUNIER DUVAL EAU CHAUDE CHAUFFAGE S.D.E.C.C. - Société anonyme Double injection device for a pilot light for gas installations
GB2201506A (en) * 1987-02-21 1988-09-01 Bullfinch Gas fuelled combustion appliance

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0908670A1 (en) * 1997-10-06 1999-04-14 Robert Bosch Gmbh Method and device for operating an atmospheric gas burner
DE10005256B4 (en) * 2000-02-05 2010-04-29 Elster Gmbh Burner for gaseous or liquid fuels
WO2007017056A1 (en) * 2005-08-11 2007-02-15 Elster Gmbh Industrial burner and method for operating an industrial burner
US8062027B2 (en) 2005-08-11 2011-11-22 Elster Gmbh Industrial burner and method for operating an industrial burner
EP2957831A1 (en) * 2014-06-18 2015-12-23 Robert Bosch Gmbh Burner and method for operating same
EP3086038A1 (en) * 2015-04-22 2016-10-26 Whirlpool Corporation Appliance with electronically-controlled gas flow to burners
US9841191B2 (en) 2015-04-22 2017-12-12 Whirlpool Corporation Appliance with electronically-controlled gas flow to burners
US10634347B2 (en) 2015-04-22 2020-04-28 Whirlpool Corporation Appliance with electronically-controlled gas flow to burners

Also Published As

Publication number Publication date
EP0657693B1 (en) 1998-01-21
DE59405095D1 (en) 1998-02-26
EP0657693A3 (en) 1996-03-20
DE4341997A1 (en) 1995-06-14

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