EP0865590B1 - Atmospheric-type burner - Google Patents

Atmospheric-type burner Download PDF

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Publication number
EP0865590B1
EP0865590B1 EP97941865A EP97941865A EP0865590B1 EP 0865590 B1 EP0865590 B1 EP 0865590B1 EP 97941865 A EP97941865 A EP 97941865A EP 97941865 A EP97941865 A EP 97941865A EP 0865590 B1 EP0865590 B1 EP 0865590B1
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EP
European Patent Office
Prior art keywords
gas
injector arrangement
burner according
gas burner
mixture
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
EP97941865A
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German (de)
French (fr)
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EP0865590A1 (en
Inventor
Juergen Stoschek
Marcus Bienzle
Michael Jantzer
Beate Maucher
Thomas-Eckart Frieling
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Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Publication of EP0865590A1 publication Critical patent/EP0865590A1/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
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/10—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head
    • 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
    • F23D14/48—Nozzles
    • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
    • F23D14/583—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration of elongated shape, e.g. slits
    • 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
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/045—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with a plurality of burner bars assembled together, e.g. in a grid-like arrangement
    • 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
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/10—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head
    • F23D14/105—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head with injector axis parallel to the burner head axis
    • 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
    • F23D14/78—Cooling burner parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/108—Flame diffusing means with stacked sheets or strips forming the outlets

Definitions

  • the invention is based on an atmospheric gas burner for heaters, especially water heaters, according to the genus of the main claim.
  • An atmospheric gas burner is already known from EP 377 233 A1 with a plurality of burner elements lying side by side known, each burner element an injector arrangement, one downstream of the injector arrangement Deflection area and an adjoining mixture distribution space having.
  • the injector arrangements of the individual Burner elements run horizontally and parallel to Location of the burner plate.
  • a gas burner with two adjacent injector arrangements, those in front of a burner plate Lead mixture distribution space is apparent from DE-OS 2 318 658.
  • the injector arrangements are each vertical arranged to the burner plate. This arrangement eliminates a deflection area.
  • a burner element with a horizontally arranged injector arrangement further emerges from NL 65 08 630. Also here each injector arrangement is a mixture distribution space downstream, which is in the flow direction of Fuel gas-air mixture is located in front of the burner plate.
  • Burner elements also arranged horizontally Injector arrangement, a deflection area and an adjoining Mixture distribution room go out of the DE-AS 1 274 055, here also each injector arrangement a deflection area and a mixture distribution space assigned.
  • the arrangement offers a similar arrangement NL 29 32 70.
  • EP 473 826 A1 is a burner plate known for a surface gas burner in which the burner plate has finned sheets through the cooling tubes are led.
  • the arrangement according to the invention with the features of The main claim has the advantage that the manufacture of a compact atmospheric gas burner with low height is possible by flame cooling and complete superstoichiometric premixing (air ratio ⁇ > 1) of the fuel gas with the combustion air low Pollutant emissions, especially low NOx and CO values, having.
  • air ratio ⁇ > 1 air ratio of the fuel gas with the combustion air low Pollutant emissions, especially low NOx and CO values, having.
  • In the deflection area of the gas burner takes place through the swirling of the fuel gas-air mixture an additional one Mixing instead, so that the flow channels in can be chosen shorter according to the injector arrangement can.
  • An advantageous alternative to cylindrical trained flow channels consists in the formation of elongated flow channels, those in the inlet area several nozzles are assigned. With that Flow resistance, sensitivity to Positioning tolerances and manufacturing costs continue reduced.
  • the distinctive structuring of the burner plate can be achieved by not between two set back sheet metal fins one or more recessed or shortened rib provided is.
  • FIG. 1 shows a Longitudinal section of the gas burner according to the invention
  • Figure 2 2 shows a section of the gas burner along the line A-A in FIG. 1
  • 3 shows an enlarged section of the burner plate
  • 4 a top view of the burner plate
  • FIGS. 5 a further embodiments of an injector.
  • FIG. 1 shows a gas burner 10 with a nozzle 12 having gas supply device 14 which is opposite a horizontally aligned injector assembly 16 of the Gas burner 10 is so spaced in the flow direction that the nozzles 12 each have a cylindrical shape at a distance Flow channel 18 lies opposite, the nozzles 12 on Height of the central axes of the flow channels 18 arranged are.
  • the central axes of the flow channels 18 run in the essentially rectilinear, the flow cross-section up to an extension 20 designed as an inlet Inlet area is substantially constant.
  • the relationship Length to diameter of those arranged in the injector 16 Flow channels 18 is ⁇ 4: 1, deviating from known ones Injector arrangements for gas burners in which the factor is 10 is up to 12.
  • a in the flow direction of the fuel gas-air mixture connected to the injector arrangement 16 90 ° deflection area 22 goes to one side funnel-shaped mixture distributor 24 above, on whose outlet is opposite the mixture distributor 24 sealed burner plate 26 is arranged.
  • the with fasteners 28 against the Mixer distributor 24 fixed burner plate 26 is with slats or ribs 30, 31 of different lengths (FIG. 3) constructed, which by a cooling coil 32 with each other are connected and between them channels or column 34 for limit the passage of the fuel gas-air mixture, the on the side of the burner plate 26 facing the combustion chamber is flammable.
  • the ribs 30, 31 made of stainless steel are in good thermal contact with the copper existing cooling pipe coil 32 and are through this too connected to a rigid structural unit.
  • the width a of the column 34 is smaller than the so-called extinguishing distance, so that flames are not in the burner plate 26 or in front of it horizontal mixture distribution zone can strike back.
  • the burner plate 26 is designed so that two shorter ribs 31 each between two longer ribs 30 stand.
  • the arrangement is such that the edges 36 of the shorter ribs 31 opposite the combustion chamber the edges 38 of the longer ribs 30 are set back. This results in on the wall on the combustion chamber side Burner plate 26 a heavily stepped Surface structuring with wide spaces 40 that laterally through wall areas 42 of the longer ribs 30 are limited.
  • the burner plate 26 is laterally by in the combustion chamber projecting end fins 44, 46 completed a flashover of the flame created during combustion prevent.
  • Figure 4 shows a plan view of the Burner plate 26 and leaves the course of the cooling coil detect.
  • the gas burner 10 operates in the following way:
  • Fuel gas is introduced into the flow channels 18 via the gas nozzles 12 injected the injector assembly 16, wherein by the Combustion gas flow ambient air is entrained.
  • the entire Burner system (nozzle pressure, injectors, deflection area, Burner plate etc.) is designed so that the for a Combustion with excess air ( ⁇ > 1) necessary Combustion air already completely with the Primary air intake is provided (so-called Vormischbrennerkal).
  • Vormischbrennerkal Vormischbrennerkal
  • the designed as an enema Extension 20 at the inlet of the flow channels 18 allows low-friction entry of the combustion air into the Flow channel 18. That in the flow channels 18th fuel gas-air mixture forming meets the deflection area 22 where there is further mixing by swirling of the fuel gas comes with the combustion air.
  • By the funnel-shaped adjoining the deflection region 22 expanding mixture distributor 24 takes place in addition to the distribution the mixture is homogenized; beyond that by reducing the speed a high proportion of the dynamic pressure necessary for the
  • the burner plate 26 After the fuel gas-air mixture the burner plate 26 has reached, the mixture reacts between or to the downstream edges 36, 38 of the ribs 30, 31 below Flame formation, whereby heat of reaction from the flame roots via the ribs 30, 31 to the water to be heated in the Pipe coil 32 arrives.
  • the flame roots are here particularly well cooled because they also touch the sides Have wall areas 42 of the ribs 30.
  • the thermal conductivity the ribs 30, 31 is by design and / or Material selection matched to the burner output so that their surface temperature is, for example, 400 ° C established.
  • FIG. 5 shows a further injector arrangement, in which the cylindrical flow channels 18 through elongated flow channels are replaced.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)

Description

Die Erfindung geht aus von einem atmosphärischen Gasbrenner für Heizgeräte, insbesondere Wassererhitzer, nach der Gattung des Hauptanspruchs.The invention is based on an atmospheric gas burner for heaters, especially water heaters, according to the genus of the main claim.

Stand der TechnikState of the art

Es sind nach diesem Prinzip arbeitende Gasbrenner bekannt (FR-PS 2 199 853), deren Brennerplatte aus Rippen aufgebaut ist, wobei zur Reduzierung der Brennerplattentemperatur und Flammentemperatur die Rippen von einem von Kühlmittel durchflossenen Rohrsystem durchsetzt sind.Gas burners operating on this principle are known (FR-PS 2 199 853), whose burner plate is made up of ribs is, to reduce the burner plate temperature and Flame temperature the fins of a coolant flowed through Pipe system are interspersed.

Aus der EP 377 233 A1 ist bereits ein atmosphärischer Gasbrenner mit einer Mehrzahl nebeneinanderliegender Brennerelemente bekannt, wobei jedes Brennerelement eine Injektoranordnung, einen der Injektoranordnung nachgeschalteten Umlenkbereich und einen sich daran anschließenden Gemischverteilraum aufweist. Die Injektoranordnungen der einzelnen Brennerelemente verlaufen dabei horizontal und parallel zur Lage der Brennerplatte.An atmospheric gas burner is already known from EP 377 233 A1 with a plurality of burner elements lying side by side known, each burner element an injector arrangement, one downstream of the injector arrangement Deflection area and an adjoining mixture distribution space having. The injector arrangements of the individual Burner elements run horizontally and parallel to Location of the burner plate.

Ein Gasbrenner mit zwei nebeneinanderliegenden Injektoranordnungen, die in einen einer Brennerplatte vorgelagerten Gemischverteilraum führen, geht aus der DE-OS 2 318 658 hervor. Hierbei sind die Injektoranordnungen jeweils senkrecht zur Brennerplatte angeordnet. Durch diese Anordnung entfällt ein Umlenkbereich. A gas burner with two adjacent injector arrangements, those in front of a burner plate Lead mixture distribution space is apparent from DE-OS 2 318 658. The injector arrangements are each vertical arranged to the burner plate. This arrangement eliminates a deflection area.

Ein Brennerelement mit einer horizontal angeordneten Injektoranordnung geht ferner aus der NL 65 08 630 hervor. Auch hier ist jeder Injektoranordnung jeweils ein Gemischverteilraum nachgeschaltet, der sich in Strömungsrichtung des Brenngas-Luft-Gemischs vor der Brennerplatte befindet.A burner element with a horizontally arranged injector arrangement further emerges from NL 65 08 630. Also here each injector arrangement is a mixture distribution space downstream, which is in the flow direction of Fuel gas-air mixture is located in front of the burner plate.

Aus der DE 195 40 772 A1 ist ein atmosphärischer Gasbrenner bekannt, bei dem die Injektoranordnung über langlochförmige Strömungskanäle verfügt, denen mehrere Gasdüsen zugeordnet sind.DE 195 40 772 A1 describes an atmospheric gas burner known, in which the injector arrangement via slot-shaped Flow channels, which are assigned several gas nozzles are.

Brennerelemente mit einer ebenfalls horizontal angeordneten Injektoranordnung, einem Umlenkbereich und einem sich anschliessenden Gemischverteilraum gehen aus der DE-AS 1 274 055 hervor, wobei auch hier jeder Injektoranordnung jeweils ein Umlenkbereich und jeweils ein Gemischverteilraum zugeordnet ist. Eine ähnliche Anordnung bietet die NL 29 32 70.Burner elements also arranged horizontally Injector arrangement, a deflection area and an adjoining Mixture distribution room go out of the DE-AS 1 274 055, here also each injector arrangement a deflection area and a mixture distribution space assigned. The arrangement offers a similar arrangement NL 29 32 70.

Schliesslich ist aus der EP 473 826 A1 eine Brennerplatte für einen Oberflächen-Gasbrenner bekannt, bei dem die Brennerplatte über Lamellenbleche verfügt, durch die Kühlrohre geführt sind.Finally, EP 473 826 A1 is a burner plate known for a surface gas burner in which the burner plate has finned sheets through the cooling tubes are led.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Anordnung mit den Merkmalen des Hauptanspruchs hat den Vorteil, daß die Herstellung eines kompakten atmosphärischen Gasbrenners mit geringer Bauhöhe möglich ist, der gleichzeitig durch Flammenkühlung und vollständige überstöchiometrische Vormischung (Luftzahl λ > 1) des Brenngases mit der Verbrennungsluft niedrige Schadstoffemissionen, insbesondere niedrige NOx und CO-Werte, aufweist. In dem Umlenkbereich des Gasbrenners findet durch die Verwirbelung des Brenngas-Luft-Gemisches eine zusätzliche Durchmischung statt, so daß die Strömungskanäle in der Injektoranordnung entsprechend kürzer gewählt werden können. The arrangement according to the invention with the features of The main claim has the advantage that the manufacture of a compact atmospheric gas burner with low height is possible by flame cooling and complete superstoichiometric premixing (air ratio λ> 1) of the fuel gas with the combustion air low Pollutant emissions, especially low NOx and CO values, having. In the deflection area of the gas burner takes place through the swirling of the fuel gas-air mixture an additional one Mixing instead, so that the flow channels in can be chosen shorter according to the injector arrangement can.

Durch die in den Unteransprüchen aufgeführten Merkmale sind vorteilhafte Ausgestaltungen der Anordnung nach dem Hauptanspruch möglich.By the features listed in the subclaims advantageous embodiments of the arrangement according to Main claim possible.

Durch die im wesentlichen horizontale Anordnung der Injektoren kann die Bauhöhe eines mit diesem Brenner versehenen Heizgerätes insgesamt niedrig gehalten werden.Due to the essentially horizontal arrangement of the The height of one injector can be achieved with this burner provided heater can be kept low overall.

Wegen des strömungstechnisch einfachen Aufbau der Injektoren ist eine druckgußtechnische Herstellung ohne Nachbearbeitung möglich. Durch die in der Injektoranordnung eingebrachten geradlinig verlaufenden Strömungskanäle mit konstantem Querschnitt werden die Strömungswiderstände minimiert.Because of the aerodynamically simple structure of the injectors is a die casting production without post-processing possible. Through the introduced in the injector arrangement rectilinear flow channels with constant Flow resistances are minimized.

Durch die kurzen mit einem großen Durchmesser versehenen Strömungskanäle besteht eine geringe Empfindlichkeit gegenüber Toleranzen zwischen der Positionierung Düse-Strömungskanal, was wiederum die Montagekosten senkt.Due to the short with a large diameter Flow channels have a low sensitivity against tolerances between the positioning of the nozzle flow channel, which in turn lowers assembly costs.

Eine vorteilhafte Alternative zu zylinderförmig ausgebildeten Strömungskanälen besteht in der Ausbildung von langlochförmigen Strömungskanälen, denen im Einlaßbereich mehrere Düsen zugeordnet sind. Damit werden Strömungswiderstände, Empfindlichkeiten gegenüber Positionierungstoleranzen und die Fertigungskosten weiter reduziert.An advantageous alternative to cylindrical trained flow channels consists in the formation of elongated flow channels, those in the inlet area several nozzles are assigned. With that Flow resistance, sensitivity to Positioning tolerances and manufacturing costs continue reduced.

Für eine kostengünstige Herstellung des Brenners ist es besonders vorteilhaft, wenn Injektoranordnung, Umlenkbereich und Gemischverteiler einteilig hergestellt werden können. It is for an inexpensive manufacture of the burner particularly advantageous if injector arrangement, deflection area and mixture distributors can be manufactured in one piece.

Aufgrund der die Oberfläche vergrößernden, mit einem Kühlrohrsystem verbundenen Rippen sind die Temperaturen an der Brennerplatte auf Werte begrenzt, die den Einsatz einer elastischen Dichtung zwischen Gemischverteiler und Brennerplatte ermöglichen.Because of the surface enlarging, with a Ribs connected to the cooling pipe system are at temperatures the burner plate is limited to values that require the use of a elastic seal between mixture distributor and Allow burner plate.

Eine gute Wärmeableitung wird erreicht, wenn das Kühlmittel führende Rohr aus Kupfer besteht, während die Rippen der Brennerplatte aufgrund der höheren Wärmebelastung vorzugsweise aus Edelstahl gebildet sind.Good heat dissipation is achieved when the coolant leading tube is made of copper, while the fins of the Burner plate due to the higher heat load are preferably made of stainless steel.

Bei der aus Rippen aufgebauten Brennerplatte hat es sich als vorteilhaft erwiesen, wenn die brennraumseitigen Ränder von bestimmten Rippen gegenüber den brennraumseitigen Rändern der anderen Rippen zurückversetzt sind. Dadurch wird eine besonders ausgeprägte Strukturierung der brennraumseitigen Wand der Brennerplatte erreicht, bei welcher die Flammenwurzeln über größere Seitenbereiche an benachbarten Blechrippen anliegen und daher besonders gut gekühlt werden.In the burner plate made up of ribs, it turned out to be proved to be advantageous if the edges of the combustion chamber certain ribs opposite the edges on the combustion chamber side the other ribs are set back. This will make one particularly pronounced structuring of the combustion chamber side Wall of the burner plate reached, at which the Flame roots over larger side areas on neighboring ones Sheet metal fins rest and are therefore particularly well cooled.

Die ausgeprägte Strukturierung der Brennerplatte kann dadurch erreicht werden, daß jeweils zwischen zwei nicht zurückversetzten Blechrippen eine oder mehrere zurückversetzte beziehungsweise gekürzte Rippe vorgesehen ist.The distinctive structuring of the burner plate can can be achieved by not between two set back sheet metal fins one or more recessed or shortened rib provided is.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der folgenden Beschreibung unter Angabe weiterer Vorteile näher erläutert. Es zeigen Figur 1 einen Längsschnitt des erfindungsgemäßen Gasbrenners, Figur 2 einen Schnitt des Gasbrenners nach der Linie A-A in Figur 1, Fig. 3 einen vergrößerten Ausschnitt der Brennerplatte, Fig. 4 eine Draufsicht auf die Brennerplatte und die Figuren 5 eine weitere Ausführungsformen eines Injektors.An embodiment of the invention is in the drawing shown and in the following description with indication further advantages explained in more detail. 1 shows a Longitudinal section of the gas burner according to the invention, Figure 2 2 shows a section of the gas burner along the line A-A in FIG. 1, 3 shows an enlarged section of the burner plate, 4 a top view of the burner plate and FIGS. 5 a further embodiments of an injector.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Figur 1 zeigt einen Gasbrenner 10, mit einer eine Düse 12 aufweisenden Gaszufuhreinrichtung 14, die gegenüber einer horizontal ausgerichteten Injektoranordnung 16 des Gasbrenners 10 in Strömungsrichtung so beabstandet ist, daß den Düsen 12 jeweils mit Abstand ein zylinderförmiger Strömungskanal 18 gegenüberliegt, wobei die Düsen 12 auf Höhe der Mittelachsen der Strömungskanäle 18 angeordnet sind. Die Mittelachsen der Strömungskanäle 18 verlaufen im wesentlichen geradlinig, wobei der Strömungsquerschnitt bis auf eine als Einlauf gestaltete Erweiterung 20 im Einlaßbereich im wesentlichen konstant ist. Das Verhältnis Länge zu Durchmesser der im Injektor 16 angeordneten Strömungskanäle 18 beträgt < 4:1, abweichend von bekannten Injektoranordnungen für-Gasbrenner, bei denen der Faktor 10 bis 12 beträgt. Ein sich in Strömungsrichtung des Brenngas-Luft-Gemisches an die Injektoranordnung 16 anschließender 90°-Umlenkbereich 22 geht in einen nach einer Seite trichterförmig erweiterten Gemischverteiler 24 über, an dessen Auslaß eine gegenüber dem Gemischverteiler 24 abgedichtete Brennerplatte 26 angeordnet ist.FIG. 1 shows a gas burner 10 with a nozzle 12 having gas supply device 14 which is opposite a horizontally aligned injector assembly 16 of the Gas burner 10 is so spaced in the flow direction that the nozzles 12 each have a cylindrical shape at a distance Flow channel 18 lies opposite, the nozzles 12 on Height of the central axes of the flow channels 18 arranged are. The central axes of the flow channels 18 run in the essentially rectilinear, the flow cross-section up to an extension 20 designed as an inlet Inlet area is substantially constant. The relationship Length to diameter of those arranged in the injector 16 Flow channels 18 is <4: 1, deviating from known ones Injector arrangements for gas burners in which the factor is 10 is up to 12. A in the flow direction of the fuel gas-air mixture connected to the injector arrangement 16 90 ° deflection area 22 goes to one side funnel-shaped mixture distributor 24 above, on whose outlet is opposite the mixture distributor 24 sealed burner plate 26 is arranged.

Die mit Befestigungsmitteln 28 gegenüber dem Gemischverteiler 24 fixierte Brennerplatte 26 ist mit unterschiedlich langen Lamellen bzw. Rippen 30, 31 (Fig. 3) aufgebaut, welche durch eine Kühlrohrschlange 32 miteinander verbunden sind und zwischen sich Kanäle bzw. Spalte 34 für den Durchtritt des Brenngas-Luft-Gemisches begrenzen, das auf der dem Brennraum zugewandten Seite der Brennerplatte 26 entzündbar ist. Die aus Edelstahl bestehenden Rippen 30, 31 stehen in gut wärmeleitendem Kontakt mit der aus Kupfer bestehenden Kühlrohrschlange 32 und sind durch diese zu einer starren Baueinheit verbunden. Die Breite a der Spalte 34 ist kleiner als der sogenannte Löschabstand bemessen, so daß Flammen nicht in die Brennerplatte 26 bzw. in die davor liegende Gemischverteilerzone zurückschlagen können.The with fasteners 28 against the Mixer distributor 24 fixed burner plate 26 is with slats or ribs 30, 31 of different lengths (FIG. 3) constructed, which by a cooling coil 32 with each other are connected and between them channels or column 34 for limit the passage of the fuel gas-air mixture, the on the side of the burner plate 26 facing the combustion chamber is flammable. The ribs 30, 31 made of stainless steel are in good thermal contact with the copper existing cooling pipe coil 32 and are through this too connected to a rigid structural unit. The width a of the column 34 is smaller than the so-called extinguishing distance, so that flames are not in the burner plate 26 or in front of it horizontal mixture distribution zone can strike back.

Wie Fig. 3 zeigt, ist die Brennerplatte 26 so gestaltet, daß zwei kürzere Rippen 31 jeweils zwischen zwei längeren Rippen 30 stehen. Dabei ist die Anordnung so getroffen, daß die brennraumseitigen Ränder 36 der kürzeren Rippen 31 gegenüber den Rändern 38 der längeren Rippen 30 zurückgesetzt sind. Dadurch ergibt sich an der brennraumseitigen Wand der Brennerplatte 26 eine stark gestufte Oberflächenstrukturierung mit breiten Zwischenräumen 40, die seitlich durch Wandbereiche 42 der längeren Rippen 30 begrenzt sind. Die Brennerplatte 26 wird seitlich durch in den Brennraum ragende Endlamellen 44, 46 abgeschlossen, die ein Überschlagen der bei der Verbrennung entstehenden Flamme verhindern. Figur 4 zeigt eine Draufsicht auf die Brennerplatte 26 und läßt den Verlauf der Kühlrohrschlange erkennen.3, the burner plate 26 is designed so that two shorter ribs 31 each between two longer ribs 30 stand. The arrangement is such that the edges 36 of the shorter ribs 31 opposite the combustion chamber the edges 38 of the longer ribs 30 are set back. This results in on the wall on the combustion chamber side Burner plate 26 a heavily stepped Surface structuring with wide spaces 40 that laterally through wall areas 42 of the longer ribs 30 are limited. The burner plate 26 is laterally by in the combustion chamber projecting end fins 44, 46 completed a flashover of the flame created during combustion prevent. Figure 4 shows a plan view of the Burner plate 26 and leaves the course of the cooling coil detect.

Der Gasbrenner 10 arbeitet auf folgende Art und Weise:The gas burner 10 operates in the following way:

Über die Gasdüsen 12 wird Brenngas in die Strömungskanäle 18 der Injektoranordnung 16 eingedüst, wobei durch den Brenngasstrom Umgebungsluft mitgerissen wird. Das gesamte Brennersystem (Düsendruck, Injektoren, Umlenkbereich, Brennerplatte etc.) ist so ausgelegt, daß die für eine Verbrennung mit Luftüberschuß (λ > 1) notwendige Verbrennungsluft bereits vollständig mit der Primärluftansaugung zur Verfügung gestellt wird (sogenanntes Vormischbrennerprinzip). Die als Einlauf gestaltete Erweiterung 20 am Einlaß der Strömungskanäle 18 ermöglicht einen reibungsarmen Eintritt der Verbrennungsluft in den Strömungskanal 18. Das sich in den Strömungskanälen 18 bildende Brenngas-Luft-Gemisch trifft auf den Umlenkbereich 22, wo es durch Verwirbelung zu einer weiteren Durchmischung des Brenngases mit der Verbrennungsluft kommt. Durch den sich an den Umlenkbereich 22 anschließenden trichterförmig erweiternden Gemischverteiler 24 findet neben der Verteilung des Gemisches eine Homogenisierung statt; darüberhinaus wird durch die Geschwindigkeitsreduzierung ein hoher Anteil des dynamischen Drucks in für die Verbrennung notwendigen statischen Druck umgewandelt.Fuel gas is introduced into the flow channels 18 via the gas nozzles 12 injected the injector assembly 16, wherein by the Combustion gas flow ambient air is entrained. The entire Burner system (nozzle pressure, injectors, deflection area, Burner plate etc.) is designed so that the for a Combustion with excess air (λ> 1) necessary Combustion air already completely with the Primary air intake is provided (so-called Vormischbrennerprinzip). The designed as an enema Extension 20 at the inlet of the flow channels 18 allows low-friction entry of the combustion air into the Flow channel 18. That in the flow channels 18th fuel gas-air mixture forming meets the deflection area 22 where there is further mixing by swirling of the fuel gas comes with the combustion air. By the funnel-shaped adjoining the deflection region 22 expanding mixture distributor 24 takes place in addition to the distribution the mixture is homogenized; beyond that by reducing the speed a high proportion of the dynamic pressure necessary for the combustion static pressure converted.

Nachdem das Brenngas-Luft-Gemisch die Brennerplatte 26 erreicht hat, reagiert das Gemisch zwischen bzw. an den stromab liegenden Rändern 36, 38 der Rippen 30, 31 unter Flammenbildung, wobei Reaktionswärme aus den Flammenwurzeln über die Rippen 30, 31 an das aufzuheizende Wasser in der Rohrschlange 32 gelangt. Die Flammenwurzeln werden hierbei besonders gut gekühlt, weil sie auch Seitenberührung mit den Wandbereichen 42 der Rippen 30 haben. Die Wärmeleitfähigkeit der Rippen 30, 31 ist durch Bemessung und/oder Werkstoffauswahl so auf die Brennerleistung abgestimmt, daß sich ihre Oberflächentemperatur auf zum Beispiel 400° C einstellt.After the fuel gas-air mixture the burner plate 26 has reached, the mixture reacts between or to the downstream edges 36, 38 of the ribs 30, 31 below Flame formation, whereby heat of reaction from the flame roots via the ribs 30, 31 to the water to be heated in the Pipe coil 32 arrives. The flame roots are here particularly well cooled because they also touch the sides Have wall areas 42 of the ribs 30. The thermal conductivity the ribs 30, 31 is by design and / or Material selection matched to the burner output so that their surface temperature is, for example, 400 ° C established.

Die Figur 5 zeigt eine weitere Injektoranordnungen, bei der die zylinderförmigen Strömungskanäle 18 durch langlochförmige Strömungskanäle ersetzt sind.FIG. 5 shows a further injector arrangement, in which the cylindrical flow channels 18 through elongated flow channels are replaced.

Eine besonders kostengünstige Herstellung des Brenners wird erreicht, wenn Injektoranordnung (16), Umlenkbereich (22) und Gemischverteiler (24) aus einem Druckgußteil gefertigt werden.A particularly inexpensive manufacture of the burner is reached when injector arrangement (16), deflection area (22) and mixture distributor (24) made from a die-cast part become.

Claims (9)

  1. Atmospheric gas burner for heating appliances, in particular water heaters, comprising
    a) a gas-feed device (14) having a plurality of nozzles (12),
    b) an injector arrangement (16) for the fuel-gas/air mixture,
    c) a deflecting region (22), adjoining the injector arrangement (16), for deflecting the fuel-gas/air mixture and an adjoining mixture distributor (24), and
    d) a burner plate (26) which is arranged at the outlet of the mixture distributor (24) and is constructed with ribs (30, 31) which are connected to one another by a cooling-pipe system (32) and define between them passages or gaps (34) for the passage of the fuel-gas/air mixture, which can be ignited on a side of the burner plate (26) facing the combustion chamber, characterized in that the injector arrangement (16) has at least two flow passages (18) which lie side by side and are oriented essentially horizontally and via which the fuel-gas/air mixture, with the interposition of the deflecting region (22), is directed into a common space, as mixture distributor (24), arranged upstream of the burner plate (26).
  2. Gas burner according to Claim 1, characterized in that the flow passage (18) formed in the injector arrangement (16) has an essentially constant flow cross section, the centre axis of the flow passage (18) running essentially rectilinearly.
  3. Gas burner according to Claim 1, characterized in that the ratio of length to height of the flow passage (18) is < 4:1.
  4. Gas burner according to Claim 1, characterized in that the injector arrangement (16) has a plurality of cylindrical flow passages (18), to which a nozzle (12) for the gas feed is assigned in each case in the inlet region, the ratio of the diameter of the flow passage (18) to the outside diameter of the nozzle (12) being at least 2:1.
  5. Gas burner according to Claim 1, characterized in that the injector arrangement (16) has a plurality of elongated-hole-shaped flow passages (18), a plurality of nozzles (12) being assigned to a flow passage (18) in the inlet region.
  6. Gas burner according to Claim 1, characterized in that the entire injector arrangement (16) has only one elongated-hole-shaped flow passage (18), to which all the nozzles (12) for the gas feed are assigned in the inlet region.
  7. Gas burner according to one of the preceding claims, characterized in that injector arrangement (16), deflecting region (22) and mixture distributor (24) are combined to form a construction unit.
  8. Gas burner according to one of the preceding claims, characterized in that the burner plate (26) is sealed off from the mixture distributor (24) by an elastic seal.
  9. Gas burner according to one of the preceding claims, characterized in that the ribs (30, 31) of the burner plate (26) are made of high-grade steel, whereas the pipe (32) carrying cooling medium is made of copper.
EP97941865A 1996-10-04 1997-09-04 Atmospheric-type burner Expired - Lifetime EP0865590B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19641040A DE19641040A1 (en) 1996-10-04 1996-10-04 Atmospheric gas burner
DE19641040 1996-10-04
PCT/DE1997/001938 WO1998015781A1 (en) 1996-10-04 1997-09-04 Atmospheric-type burner

Publications (2)

Publication Number Publication Date
EP0865590A1 EP0865590A1 (en) 1998-09-23
EP0865590B1 true EP0865590B1 (en) 2002-05-22

Family

ID=7807918

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97941865A Expired - Lifetime EP0865590B1 (en) 1996-10-04 1997-09-04 Atmospheric-type burner

Country Status (6)

Country Link
EP (1) EP0865590B1 (en)
JP (1) JP2000502436A (en)
KR (1) KR19990071702A (en)
DE (2) DE19641040A1 (en)
ES (1) ES2178002T3 (en)
WO (1) WO1998015781A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19954811A1 (en) * 1999-11-13 2001-05-17 Bosch Gmbh Robert Lamella burner
DE10008549B4 (en) * 2000-02-24 2004-03-25 Robert Bosch Gmbh Burner head with metal plate and pipe sections for a coolant
DE20109170U1 (en) * 2001-06-05 2002-10-10 Viessmann Werke Kg Atmospheric gas burner
DE10213132B4 (en) * 2002-03-23 2005-06-02 Robert Bosch Gmbh gas burner
DE202007018472U1 (en) 2007-03-31 2008-08-21 Robert Bosch Gmbh Premixing gas burner
TWI611146B (en) * 2016-09-26 2018-01-11 Grand Mate Co Ltd burner

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0377233A1 (en) * 1989-01-06 1990-07-11 Remeha Fabrieken B.V. Low NOx atmospheric gas burner

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL293270A (en) *
DE1274055B (en) * 1963-02-14 1968-08-01 Vaillant Joh Kg Group Bunsen burners consisting of several individual burners, especially for gas water heaters
NL6508630A (en) * 1965-07-05 1967-01-06
US3897198A (en) 1972-04-17 1975-07-29 Radiation Ltd Gaseous fuel burners
DE8120009U1 (en) * 1981-07-09 1982-12-30 Robert Bosch Gmbh, 7000 Stuttgart ATMOSPHERIC ALLGAS BURNER, IN PARTICULAR FOR HOUSEHOLD APPLIANCES
NL193596C (en) * 1989-03-14 2000-03-02 Rendamax Bv Burner head for a surface burner gas burner.
DE4428097A1 (en) * 1994-08-09 1996-02-22 Bosch Gmbh Robert Method for operating a heater and heater for performing the method
DE4445460A1 (en) * 1994-12-20 1996-06-27 Bosch Gmbh Robert Gas burners for heating devices, in particular water heaters
DE19540772A1 (en) * 1995-11-02 1997-05-07 Buderus Heiztechnik Gmbh Atmospheric gas burner with at least one element containing venturi tube
DE29604471U1 (en) * 1996-03-11 1996-05-23 Buderus Heiztechnik Gmbh Premix gas burner

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0377233A1 (en) * 1989-01-06 1990-07-11 Remeha Fabrieken B.V. Low NOx atmospheric gas burner

Also Published As

Publication number Publication date
EP0865590A1 (en) 1998-09-23
WO1998015781A1 (en) 1998-04-16
JP2000502436A (en) 2000-02-29
ES2178002T3 (en) 2002-12-16
DE59707327D1 (en) 2002-06-27
KR19990071702A (en) 1999-09-27
DE19641040A1 (en) 1998-04-23

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