EP0778442A2 - Radiant gas burner with burner plate of fibre material and reduced noise generation - Google Patents
Radiant gas burner with burner plate of fibre material and reduced noise generation Download PDFInfo
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- EP0778442A2 EP0778442A2 EP96115758A EP96115758A EP0778442A2 EP 0778442 A2 EP0778442 A2 EP 0778442A2 EP 96115758 A EP96115758 A EP 96115758A EP 96115758 A EP96115758 A EP 96115758A EP 0778442 A2 EP0778442 A2 EP 0778442A2
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- burner
- housing
- plate
- burner plate
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- 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
- F23D14/12—Radiant burners
- F23D14/16—Radiant burners using permeable blocks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2203/00—Gaseous fuel burners
- F23D2203/10—Flame diffusing means
- F23D2203/105—Porous plates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2210/00—Noise abatement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2212/00—Burner material specifications
- F23D2212/10—Burner material specifications ceramic
- F23D2212/103—Fibres
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2212/00—Burner material specifications
- F23D2212/20—Burner material specifications metallic
- F23D2212/201—Fibres
Definitions
- the present invention relates to a gas radiation burner with a metallic housing as the burner chamber, a mixing tube for supplying the gas / air mixture to the burner chamber, with a burner plate made of fiber material, with control devices for the gas supply, a blower for the air supply, and with conventional ignition, Safety and temperature monitoring devices.
- German patent DE 24 40 701 C3 describes a gas stove with a plurality of burner burners which are designed as gas-fired jet burners with perforated ceramic plates, on the surface of which the gas burns flamelessly. These are arranged at a distance below a glass ceramic plate common to all burners. The space surrounding the burner is closed on all sides except for openings outside the glass ceramic plate and from the gas stove operating side for discharging the combustion gases, and each burner has an ignition device which can be actuated from the outside and an ignition protection device to protect against the outflow of unburned gas.
- This invention is characterized in that a small distance of approximately 10 mm to 15 mm is selected between the glass ceramic plate and the jet surface of each burner ceramic plate, that each burner is divided into at least two chambers and that each of these chambers has a gas injector which sucks in the combustion air Is provided.
- DE 24 40 701 C3 is based on the task of creating a gas cooker which has a high degree of efficiency and which, while maintaining this high degree of efficiency, nevertheless allows a good possibility of regulation with regard to different heat requirements.
- US Pat. No. 4,673,349 is used to derive gas radiation burners with burner plates made of porous ceramic, which have a pore volume of more than 30% by volume and an average pore diameter of 25-500 ⁇ m. Furthermore, these burner plates have a large number of continuous channels, spaced 2 to 30 mm apart, with hydraulic diameters of 0.05 to 5.0 mm, which run perpendicular to the combustion surface.
- the porous ceramic consists in particular of a composite material which can contain 2-50% by weight of heat-resistant inorganic, in particular ceramic fibers.
- porous, perforated ceramic plates or fiber braids made of ceramic or metal are used as burner plates. These burner plates close off the mixing or burner chamber in which the gas / air mixture is mixed. Small flames burn in the top layer of the burner plate, causing the burner plates to glow and act as radiant heaters. The temperature of the radiant burner plate is between about 900 and 950 ° C. Similar gas radiation burners are also used in room heating, in hot water conditioners and in drying systems. Generally, the entire surface of the burner plate is illuminated; only with dual-circuit burners, an inner circular disc and an outer ring burner are operated separately.
- a disadvantage of gas radiation burners with burner plates made of fiber material is that in the start-up phase the burner, ie. H. within the first 15 seconds after ignition, an acoustic phenomenon occurs that is clearly audible to the user as a loud hum. This hum is not a safety risk, but it does affect the usability and the life of the burner plate.
- the gas is injected into a mixing tube through a nozzle.
- the high speed of the gas creates a negative pressure in the immediate vicinity of the bullet, causing air to be sucked into the mixing tube.
- This gas / air mixture flows into the burner chamber, passes homogeneously through the burner plate and is ignited at the top.
- the burner plate thus serves as a flame holder to fix the flames to the top of the burner plate.
- the flames give off energy to the burner plate. This is enough to make the upper fiber layers of the burner plate glow.
- the radiation energy thus generated can now be released to the medium to be heated.
- the object of the present invention is therefore to provide a simple gas radiation burner with reduced or no noise, which reduces the pressure drop of the entire burner to a minimum value and which can also be supplied with sufficient combustion air with fans which are smaller in terms of their output and size.
- the object of the invention is achieved in that the burner plate is connected to the housing of the burner chamber not only in the common edge area, but in particular also in the middle area.
- the burner plate itself is also set in vibration and thus contributes primarily and significantly to the development of noise. If the vibration of the burner plate is suppressed according to the invention, the noise is consequently also eliminated.
- connection area does not glow itself, which can be advantageous:
- even lowering the specific output in the middle of the burner is beneficial, since otherwise there is a sharp increase in temperature in the middle of the burner during operation.
- the cookware used in practical use sits on the edge of the floor and is curved upwards in the middle of the floor, creating a thin air cushion. This air cushion means that the heat dissipation in the middle is less than at the edge and there is a temperature peak if the burner's power distribution is even. With heating elements For this reason, for electrically operated cooking zones, the burner output is reduced in the middle compared to the average specific output.
- connection of the burner plate with the burner chamber can be realized in various ways according to the invention.
- Pointed and / or line-shaped and / or circular-shaped contact points which connect the burner plate to the housing of the burner chamber, can be formed at or at several points for or in place of the central connection.
- the burner plate is bridged indirectly with the housing of the burner chamber, with a material that dampens the vibrations that trigger the humming noise, under slight prestress, and / or by gluing to at least one of the contact surfaces.
- materials made of ceramic, glass or metal are suitable as vibration dampers, but in particular elastic materials, such as fiber materials, which also least pose the risk of damaging the sensitive burner plate.
- the diameter of the preferably circular or ring-shaped vibration damper and placed centrally in the burner chamber should not be less than 20 mm, in particular 22 mm, the diameter of the burner chamber being 210 mm in this case.
- the burner plate with the housing of the burner chamber directly by appropriate design of the housing of the burner chamber or corresponding z.
- This embodiment ensures a particularly simple assembly of the burner.
- the burner plate according to the invention consists of temperature-resistant fibers or whiskers, in particular of ceramic fibers of the Al 2 O 3 - SiO 2 system , of SiC fibers or of metallic fibers.
- Burner plates according to the invention as z. B. sells the company Global Environmental Solutions, Can Clemente, California, are made of SiC fibers (Nicalon®, Nippon Carbon or Tyranno®, UBE Industries) with a thickness of 15 ⁇ m, which are bonded together in a CVD process with SiC to form a shaped body , manufactured.
- Such burner plates have a thickness of 4 mm, a diameter of 145 or 180 or 210 mm and a porosity of 90%.
- gas radiation burners according to the present invention it has been possible, on the one hand, to virtually completely suppress the noise development in the start-up phase of such burners and, on the other hand, to avoid a pressure drop which would require more powerful fans.
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- Gas Burners (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft einen Gasstrahlungsbrenner mit einem metallischen Gehäuse als Brennerkammer, einem Mischrohr für die Zuführung des Gas- / Luftgemisches zur Brennerkammer, mit einer Brennerplatte aus Fasermaterial, mit Regeleinrichtungen für die Gaszufuhr, einem Gebläse für die Luftzufuhr, sowie mit üblichen Zünd-, Sicherheits-, und Temperaturüberwachungseinrichtungen.The present invention relates to a gas radiation burner with a metallic housing as the burner chamber, a mixing tube for supplying the gas / air mixture to the burner chamber, with a burner plate made of fiber material, with control devices for the gas supply, a blower for the air supply, and with conventional ignition, Safety and temperature monitoring devices.
Gasstrahlungsbrenner für den Einsatz in Heizungen, Warmwasserboilern und Trocknungssystemen sind bekannt.
Genauso sind solche Brenner für Kochgeräte üblich. So wird zum Beispiel in der deutschen Patentschrift DE 24 40 701 C3 ein Gasherd mit mehreren Kochstellen-Brennern beschrieben, die als gasbeheizte Strahlbrenner mit perforierten Keramikplatten, an deren Oberfläche das Gas flammenlos verbrennt, ausgebildet sind. Diese sind mit Abstand unterhalb einer für alle Brenner gemeinsamen Glaskeramikplatte angeordnet. Der die Brenner umgebende Raum ist dabei bis auf außerhalb der Glaskeramikplatte und von der Gasherdbedienungsseite abliegende Öffnungen zum Abführen der Verbrennungsgase allseitig geschlossen und jeder Brenner weist eine von außen betätigbare Zündeinrichtung und zur Sicherung gegen Ausströmen unverbrannten Gases eine Zündsicherung auf. Diese Erfindung ist dadurch gekennzeichnet, daß zwischen der Glaskeramikplatte und der Strahlfläche jeder Brenner-Keramikplatte ein geringer Abstand von etwa 10 mm bis 15 mm gewählt ist, daß jeder Brenner in mindestens zwei Kammern unterteilt ist und daß jede dieser Kammern mit einem die Verbrennungsluft ansaugenden Gasinjektor ausgestattet ist.Radiant gas burners for use in heating, hot water boilers and drying systems are known.
Such burners are also common for cooking appliances. For example, the German patent DE 24 40 701 C3 describes a gas stove with a plurality of burner burners which are designed as gas-fired jet burners with perforated ceramic plates, on the surface of which the gas burns flamelessly. These are arranged at a distance below a glass ceramic plate common to all burners. The space surrounding the burner is closed on all sides except for openings outside the glass ceramic plate and from the gas stove operating side for discharging the combustion gases, and each burner has an ignition device which can be actuated from the outside and an ignition protection device to protect against the outflow of unburned gas. This invention is characterized in that a small distance of approximately 10 mm to 15 mm is selected between the glass ceramic plate and the jet surface of each burner ceramic plate, that each burner is divided into at least two chambers and that each of these chambers has a gas injector which sucks in the combustion air Is provided.
Der DE 24 40 701 C3 liegt die Aufgabe zugrunde, einen Gasherd zu schaffen, der einen hohen Wirkungsgrad besitzt, und bei Aufrechterhaltung dieses hohen Wirkungsgrades trotzdem eine gute Regelungsmöglichkeit in Bezug auf unterschiedlichen Wärmebedarf gestattet.DE 24 40 701 C3 is based on the task of creating a gas cooker which has a high degree of efficiency and which, while maintaining this high degree of efficiency, nevertheless allows a good possibility of regulation with regard to different heat requirements.
Aus der US-PS 4,673,349 sind Gasstrahlungsbrenner mit Brennerplatten aus poröser Keramik abzuleiten, die ein Porenvolumen von mehr als 30 Vol.-% und einen mittleren Porendurchmesser von 25 - 500 µm aufweisen. Des weiteren besitzen diese Brennerplatten eine Vielzahl durchgehender, von einander 2 - 30 mm beabstandeter Kanäle mit hydraulischen Durchmessern von 0,05 - 5.0 mm, die senkrecht zur Verbrennungsoberfläche verlaufen.US Pat. No. 4,673,349 is used to derive gas radiation burners with burner plates made of porous ceramic, which have a pore volume of more than 30% by volume and an average pore diameter of 25-500 μm. Furthermore, these burner plates have a large number of continuous channels, spaced 2 to 30 mm apart, with hydraulic diameters of 0.05 to 5.0 mm, which run perpendicular to the combustion surface.
Die poröse Keramik besteht dabei besonders aus einem Verbundwerkstoff, der 2 - 50 Gew.-% hitzebeständige anorganische, insbesondere keramische Fasern enthalten kann.The porous ceramic consists in particular of a composite material which can contain 2-50% by weight of heat-resistant inorganic, in particular ceramic fibers.
Nach dem Stand der Technik werden als Brennerplatten also poröse, perforierte Keramikplatten oder Fasergeflechte aus Keramik oder Metall verwendet. Diese Brennerplatten schließen die Misch- bzw. Brennerkammer nach oben ab, in der das Gas-/ Luftgemisch zugemischt wird. In der obersten Schicht der Brennerplatte brennen kleine Flammen, durch welche die Brennerplatten zum Glühen gebracht werden und als Heizstrahler wirken. Die Temperatur der strahlenden Brennerplatte liegt zwischen etwa 900 und 950 °C.
Gleichartige Gasstrahlungsbrenner werden auch in der Raumbeheizung, in Heißwasseraufbereitern und in Trocknungssystemen eingesetzt. Generell wird die ganze Fläche der Brennerplatte zum Leuchten gebracht; lediglich bei Zweikreis-Brennern werden eine innere Kreisscheibe und ein äußerer Ringbrenner getrennt betrieben.According to the prior art, porous, perforated ceramic plates or fiber braids made of ceramic or metal are used as burner plates. These burner plates close off the mixing or burner chamber in which the gas / air mixture is mixed. Small flames burn in the top layer of the burner plate, causing the burner plates to glow and act as radiant heaters. The temperature of the radiant burner plate is between about 900 and 950 ° C.
Similar gas radiation burners are also used in room heating, in hot water conditioners and in drying systems. Generally, the entire surface of the burner plate is illuminated; only with dual-circuit burners, an inner circular disc and an outer ring burner are operated separately.
Nachteilig bei Gas-Strahlungsbrennern mit Brennerplatten aus Fasermaterial ist, daß in der Anlaufphase der Brenner, d. h. innerhalb der ersten 15 Sekunden nach Zündung, ein aktustischen Phänomen auftritt, das als lautes Brummen für den Anwender deutlich hörbar ist. Dieses Brummen stellt zwar kein Sicherheitsrisiko dar, wirkt sich aber dennoch auf die Gebrauchstauglichkeit und die Lebensdauer der Brennerplatte aus.A disadvantage of gas radiation burners with burner plates made of fiber material is that in the start-up phase the burner, ie. H. within the first 15 seconds after ignition, an acoustic phenomenon occurs that is clearly audible to the user as a loud hum. This hum is not a safety risk, but it does affect the usability and the life of the burner plate.
Dieses Phänomen entsteht wie folgt:This phenomenon arises as follows:
Das Gas wird durch eine Düse in ein Mischrohr eingeschossen. Durch die hohe Geschwindigkeit des Gases entsteht in der unmittelbaren Umgebung des Einschusses ein Unterdruck, wodurch Luft in das Mischrohr angesaugt wird. Dieses Gas-/Luftgemisch strömt in die Brennerkammer, tritt homogen verteilt durch die Brennerplatte hindurch und wird an der Oberseite gezündet. Die Brennerplatte dient so als Flammenhalter, um die Flammen an der Oberseite der Brennerplatte zu fixieren. Dabei geben die Flammen Energie an die Brennerplatte ab. Diese genügt, um die oberen Faserschichten der Brennerplatte zum Glühen zu bringen. Die so entstehende Strahlungsenergie kann nun an das zu erhitzende Medium abgegeben werden.The gas is injected into a mixing tube through a nozzle. The high speed of the gas creates a negative pressure in the immediate vicinity of the bullet, causing air to be sucked into the mixing tube. This gas / air mixture flows into the burner chamber, passes homogeneously through the burner plate and is ignited at the top. The burner plate thus serves as a flame holder to fix the flames to the top of the burner plate. The flames give off energy to the burner plate. This is enough to make the upper fiber layers of the burner plate glow. The radiation energy thus generated can now be released to the medium to be heated.
Während der Anlaufphase der Brenner, d. h. innerhalb der ersten 15 Sekunden nach der Zündung liegt aber noch kein optimales Gas-/Luftgemisch vor. D. h. kurz nachdem das Gasventil öffnet und Gas in das Mischrohr einschießt, wird zuerst eine sauerstoffhaltigere Luftsäule in den Brenner gedrückt, ehe das Gas-/Luftgemisch seine optimale Mischung erreicht und schließlich homogen gemischt an der Brennerplatte vorliegt. In dieser Anfangsphase heben die Flammen, die durch den Luftüberschuß kühler sind, von der Brennerplatte ab. Wird das Gemisch dann fetter, d. h. der Anteil des Brenngases höher, wandern die nun heißeren Flammen zurück zur Brennerplatte und geben dort Energie ab, d. h. kühlen dort aus, um dann wiederum abzuheben. Dieser Vorgang wiederholt sich einerseits solange, bis das Gemisch homogen verteilt und bei geringerem Luftüberschuß an der Brennerplatte vorliegt und andererseits die Fasertemperatur und die Flammentemperatur annähernd gleich sind. Die Frequenz, mit der die Flammen abheben bzw. zurückwandern, regt die Brennerplatte und damit eine Luftsäule zum Schwingen an. Diese Schwingungen liegen im hörbaren Bereich.During the start-up phase of the burner, ie within the first 15 seconds after ignition, there is still no optimal gas / air mixture. That is, shortly after the gas valve opens and gas shoots into the mixing tube, an air column with more oxygen is first pressed into the burner before the gas / air mixture reaches its optimum mixture and is finally homogeneously mixed on the burner plate. In this initial phase, the flames, which are cooler due to the excess air, lift off the burner plate. If the mixture becomes richer, ie the proportion of the fuel gas is higher, the now hotter flames migrate back to the burner plate and release energy there, ie cool down there and then take off again. This process is repeated on the one hand until the mixture is homogeneously distributed and there is less air excess on the burner plate and on the other hand the fiber temperature and the flame temperature approximately are the same. The frequency with which the flames take off or move back stimulates the burner plate and thus an air column to vibrate. These vibrations are in the audible range.
Üblicherweise wird dieses Problem heute so beseitigt, daß in der Brennerkammer selbst perforierte Bleche angebracht werden. Diese Bleche haben einen Druckabfall zur Folge, der um etwa den Faktor 5 bis 10 größer ist, als der Druckabfall an der Brennerplatte selbst. Durch diese Maßnahme werden zwei Räume mit unterschiedlichen Luftdichten erzeugt. Die auftretenden Schallwellen werden an diesem dichteren Volumen gedämpft, die Geräuschentwicklung damit auch unterbunden.
Nachteilig bei diesem Verfahren wirkt sich der zusätzliche Druckabfall im Brenner aus. Gegen diesen muß das Gebläse arbeiten, um ausreichend Verbrennungsluft zuführen zu können. Dies setzt aber ein Gebläse voraus, das mindestens einen gleich hohen statischen Druck aufbauen kann und als Konsequenz daraus eine größere Baugröße besitzt.Today, this problem is usually eliminated by installing perforated plates in the burner chamber itself. These sheets result in a pressure drop that is about a factor of 5 to 10 greater than the pressure drop at the burner plate itself. This measure creates two rooms with different air densities. The sound waves that occur are damped at this denser volume, which also prevents noise.
The disadvantage of this method is the additional pressure drop in the burner. The fan must work against this in order to be able to supply sufficient combustion air. However, this requires a blower that can build up at least the same high static pressure and, as a consequence, has a larger size.
Dieses Phänomen tritt im wesentlichen bei allen Strahlungsbrennern auf, vor allem aber bei gebläseunterstützten Brennern. Bei solchen Brennern tritt dieser Effekt noch stärker auf, da in der Anlaufphase, im Vergleich zu atmosphärisch arbeitenden Brennern, mehr Luft in das Mischrohr gedrückt wird und es dadurch länger dauert, bis eine optimale und homogene Gemischverteilung erreicht ist.This phenomenon occurs essentially with all radiant burners, but especially with fan-assisted burners. This effect is even more pronounced with such burners, since more air is pressed into the mixing tube in the start-up phase compared to atmospheric burners, and it therefore takes longer until an optimal and homogeneous mixture distribution is achieved.
Aufgabe der vorliegenden Erfindung ist es daher, einen einfachen Gasstrahlungsbrenner mit reduzierter oder ohne Geräuschentwicklung bereitzustellen, der den Druckabfall des gesamten Brenners auf minimale Wert reduziert und der dadurch auch mit, in ihrer Förderleistung und ihrer Baugröße kleineren Gebläsen mit ausreichend Verbrennungsluft versorgt werden kann.The object of the present invention is therefore to provide a simple gas radiation burner with reduced or no noise, which reduces the pressure drop of the entire burner to a minimum value and which can also be supplied with sufficient combustion air with fans which are smaller in terms of their output and size.
Die Aufgabe der Erfindung wird dadurch gelöst, daß die Brennerplatte mit dem Gehäuse der Brennerkammer nicht nur im gemeinsamen Randbereich, sondern insbesondere auch im Mittenbereich verbunden ist.
Es hatte sich, wie weiter oben schon angedeutet, nämlich gezeigt, daß die Brennerplatte auch selbst in Schwingung versetzt wird und so zur Geräuschentwicklung primär und wesentlich beiträgt. Wird das Schwingen der Brennerplatte nach der Erfindung unterdrückt, dann wird als Folge davon auch die Geräuschentwicklung beseitigt.The object of the invention is achieved in that the burner plate is connected to the housing of the burner chamber not only in the common edge area, but in particular also in the middle area.
As already indicated above, it had been shown that the burner plate itself is also set in vibration and thus contributes primarily and significantly to the development of noise. If the vibration of the burner plate is suppressed according to the invention, the noise is consequently also eliminated.
Der Verbindungsbereich glüht dann selbst nicht, was aber durchaus vorteilhaft sein kann:
In der Praxis ist sogar eine Absenkung der spezifischen Leistung in der Mitte des Brenners günstig, da es ansonsten im Betrieb zu einer starken Temperaturerhöhung in der Brennermitte kommt. Die im praktischen Einsatz verwendeten Kochgeschirre sitzen am Rande des Bodens auf und sind in der Bodenmitte nach oben gewölbt, wodurch ein dünnes Luftkissen entsteht. Durch dieses Luftkissen ist die Wärmeabfuhr in der Mitte weniger groß als am Rande und es kommt zu einer Temperaturspitze, wenn die Leistungsverteilung des Brenners gleichmäßig ist. Bei Heizelementen für elektrisch betriebene Kochzonen wird aus diesem Grunde die Brennerleistung in der Mitte gegenüber der mittleren spezifischen Leistung abgesenkt.The connection area does not glow itself, which can be advantageous:
In practice, even lowering the specific output in the middle of the burner is beneficial, since otherwise there is a sharp increase in temperature in the middle of the burner during operation. The cookware used in practical use sits on the edge of the floor and is curved upwards in the middle of the floor, creating a thin air cushion. This air cushion means that the heat dissipation in the middle is less than at the edge and there is a temperature peak if the burner's power distribution is even. With heating elements For this reason, for electrically operated cooking zones, the burner output is reduced in the middle compared to the average specific output.
Die Verbindung der Brennerplatte mit der Brennerkammer kann dabei nach der Erfindung auf verschiedenen Wegen realisiert werden.The connection of the burner plate with the burner chamber can be realized in various ways according to the invention.
So können zur, oder an Stelle der mittigen Verbindung noch an mehreren Stellen punktförmige und/oder linienförmige und/oder kreislinienförmige Kontaktstellen ausgebildet sein, die die Brennerplatte mit dem Gehäuse der Brennerkammer verbinden.Pointed and / or line-shaped and / or circular-shaped contact points, which connect the burner plate to the housing of the burner chamber, can be formed at or at several points for or in place of the central connection.
Dabei ist aber darauf zu achten, daß maximal 50 % der Gesamtfläche der Brennerplatte mit dem Gehäuse verbunden sind, da sich sonst wieder, wie bei den perforierten Blechen des Standes der Technik ein Druckabfall ausbildet, der höhere Gebläse-Leistungen erforderlich machen würde.However, care must be taken to ensure that a maximum of 50% of the total area of the burner plate is connected to the housing, since otherwise, as with the perforated sheets of the prior art, a pressure drop is formed which would make higher blower outputs necessary.
In bevorzugter Ausführungsform wird die Brennerplatte mit dem Gehäuse der Brennerkammer indirekt, mit einem Material, das die Schwingungen dämpft, die das Brumm-Geräusch auslösen, unter leichter Vorspannung, überbrückt und/oder durch Verklebung an mindestens einer der Kontaktflächen verbunden.In a preferred embodiment, the burner plate is bridged indirectly with the housing of the burner chamber, with a material that dampens the vibrations that trigger the humming noise, under slight prestress, and / or by gluing to at least one of the contact surfaces.
Hierzu eignen sich als Schwingungsdämpfer Materialien aus Keramik, Glas oder Metall, insbesondere aber elastische Materialien, wie Faserwerkstoffe, die auch die Gefahr einer Beschädigung der empfindlichen Brennerplatte am wenigsten nach sich ziehen.For this purpose, materials made of ceramic, glass or metal are suitable as vibration dampers, but in particular elastic materials, such as fiber materials, which also least pose the risk of damaging the sensitive burner plate.
Der Durchmesser des als Schwingungsdämpfer bevorzugt kreis- oder ringförmig ausgebildeten und mittig in der Brennerkammer plazierten Werkstoffes, sollte nicht kleiner als 20 mm, insbesondere 22 mm betragen, wobei der Durchmesser der Brennerkammer in diesem Fall 210 mm beträgt.The diameter of the preferably circular or ring-shaped vibration damper and placed centrally in the burner chamber should not be less than 20 mm, in particular 22 mm, the diameter of the burner chamber being 210 mm in this case.
In sehr bevorzugter Ausführungsform ist die Brennerplatte mit dem Gehäuse der Brennerkammer direkt, durch entsprechende Gestaltung des Gehäuses der Brennerkammer oder entsprechende z. B. "pilzförmige" Formgebung der Brennerplatte, unter leichter Vorspannung, verbunden.
Diese Ausführungsform gewährleistet einen besonders einfachen Zusammenbau des Brenners.
Auch bei diesen Ausführungsformen ist es vorteilhaft, die Kontaktfläche zwischen der Brennerplatte und dem Gehäuse mittels Verklebung zu verbinden und zu fixieren.
Die Brennerplatte nach der Erfindung besteht dabei aus temperaturbeständigen Fasern oder Whiskern, insbesondere aus keramischen Fasern des Systems Al2O3 - SiO2, aus SiC-Fasern oder aus metallischen Fasern.In a very preferred embodiment, the burner plate with the housing of the burner chamber directly, by appropriate design of the housing of the burner chamber or corresponding z. B. "mushroom-shaped" shape of the burner plate, under slight bias, connected.
This embodiment ensures a particularly simple assembly of the burner.
In these embodiments, too, it is advantageous to connect and fix the contact surface between the burner plate and the housing by means of gluing.
The burner plate according to the invention consists of temperature-resistant fibers or whiskers, in particular of ceramic fibers of the Al 2 O 3 - SiO 2 system , of SiC fibers or of metallic fibers.
Bevorzugte Ausführungsformen sind in den Figuren 1 bis 3 dargestellt:
Figur 1- zeigt eine auf einen Schwingungsdämpfer (2) aufgelegte Brennerplatte (1) mit einem Durchmesser von 210 mm. Es hat sich gezeigt, daß der Durchmesser des Dämpfers (2) nicht kleiner als 20 mm sein sollte, in bevorzugter Ausführungsform 22 mm. Das Material sollte etwas flexibel sein. Material aus keramischen Fasern (wie z. B. Keramikfaserpapier) bietet sich hierfür an. Der Dämpfer (2) selbst wird mit temperaturbeständigem Kleber (4) mit dem Gehäuse der Brennerkammer (3) verklebt.
Figur 2- zeigt,
ähnlich wie Figur 1, eine auch mit einem Schwingungsdämpfer (2) verklebte Brennerplatte (1). Bei dieser Ausführungsform kann der Dämpfer (2) aus Metall oder keramischem Material bestehen. Figur 3- zeigt eine Brennerkammer (3) aus deren Bodenblech (3a) der Dämpfer (2) herausgeformt ist. Die Brennerplatte (1) selbst wird dann im Mittenbereich mit dem Bodenblech (3a) verklebt.
- Figure 1
- shows a burner plate (1) placed on a vibration damper (2) with a diameter of 210 mm. It has been shown that the diameter of the damper (2) should not be less than 20 mm, in a preferred embodiment 22 mm. The material should be a bit flexible. Material made of ceramic fibers (such as ceramic fiber paper) is suitable for this. The damper (2) itself is glued to the housing of the burner chamber (3) using temperature-resistant adhesive (4).
- Figure 2
- shows, similar to Figure 1, also with a vibration damper (2) glued burner plate (1). In this embodiment, the damper (2) can be made of metal or ceramic material.
- Figure 3
- shows a burner chamber (3) from the bottom plate (3a) of the damper (2) is formed. The burner plate (1) itself is then glued to the base plate (3a) in the middle area.
Brennerplatten nach der Erfindung, wie sie z. B. die Firma Global Environmental Solutions, Can Clemente, Californien vertreibt, werden aus SiC-Fasern (Nicalon®, Nippon Carbon oder Tyranno®, UBE Industries) der Dicke 15 µm, die im CVD-Verfahren mit SiC miteinander zu einem Formkörper gebunden werden, hergestellt. Solche Brennerplatten haben eine Dicke von 4 mm, einen Durchmesser von 145 bzw. 180 bzw. 210 mm und eine Porosität von 90 %.Burner plates according to the invention, as z. B. sells the company Global Environmental Solutions, Can Clemente, California, are made of SiC fibers (Nicalon®, Nippon Carbon or Tyranno®, UBE Industries) with a thickness of 15 µm, which are bonded together in a CVD process with SiC to form a shaped body , manufactured. Such burner plates have a thickness of 4 mm, a diameter of 145 or 180 or 210 mm and a porosity of 90%.
Mit Gasstrahlungsbrennern nach der vorliegenden Erfindung ist es gelungen, einmal die Geräuschentwicklung in der Anlaufphase solcher Brenner praktisch vollkommen zu unterdrücken und zum anderen dabei einen Druckabfall zu vermeiden, der leistungsstärkere Gebläse erfordern würde.With gas radiation burners according to the present invention, it has been possible, on the one hand, to virtually completely suppress the noise development in the start-up phase of such burners and, on the other hand, to avoid a pressure drop which would require more powerful fans.
Claims (8)
dadurch gekennzeichnet,
daß die Brennerplatte mit dem Gehäuse der Brennerkammer nicht nur im gemeinsamen Randbereich verbunden ist.Radiant gas burner with a housing as the burner chamber, a mixing tube for supplying the gas / air mixture to the burner chamber, with a burner plate made of fiber material, with control devices for the gas supply, a blower for the air supply, and with conventional ignition, safety and temperature monitoring devices,
characterized,
that the burner plate is connected to the housing of the burner chamber not only in the common edge area.
dadurch gekennzeichnet,
daß die Brennerplatte mit dem Gehäuse der Brennerkammer im gemeinsamen Mittenbereich verbunden ist.Radiant gas burner according to claim 1,
characterized,
that the burner plate is connected to the housing of the burner chamber in the common central area.
dadurch gekennzeichnet,
daß die Brennerplatte mit dem Gehäuse der Brennerkammer an mehreren Stellen punktförmig, und/oder linienförmig und/oder kreislinienförmig verbunden ist.Radiant gas burner according to claims 1 and 2,
characterized,
that the burner plate is connected to the housing of the burner chamber at several points in a punctiform and / or linear and / or circular manner.
dadurch gekennzeichnet,
daß max. 50 % der Gesamtfläche der Brennerplatte mit dem Gehäuse verbunden sind.Radiant gas burner according to Claims 1 to 3,
characterized,
that max. 50% of the total area of the burner plate is connected to the housing.
dadurch gekennzeichnet,
daß die Brennerplatte mit dem Gehäuse der Brennerkammer indirekt, mittels eines überbrückenden Materials aus Keramik oder Faserkeramik oder Glas oder Metall, durch Verklebung mindestens einer Kontaktfläche zwischen Brennerplatte, Material und Gehäuse verbunden ist.Radiant gas burner according to claims 1 to 4,
characterized,
that the burner plate is connected indirectly to the housing of the burner chamber by means of a bridging material made of ceramic or fiber ceramic or glass or metal, by gluing at least one contact surface between the burner plate, material and housing.
dadurch gekennzeichnet,
daß die Brennerplatte mit dem Gehäuse der Brennerkammer direkt, durch entsprechende Gestaltung des Gehäuses der Brennerkammer oder entsprechende Formgebung der Brennerplatte selbst, verbunden ist.Radiant gas burner according to claims 1 to 4,
characterized,
that the burner plate is directly connected to the housing of the burner chamber by appropriate design of the housing of the burner chamber or corresponding shaping of the burner plate itself.
dadurch gekennzeichnet,
daß die Brennerplatte mit dem Gehäuse der Brennerkammer mittels Verklebung verbunden ist.Radiant gas burner according to claim 6,
characterized,
that the burner plate is connected to the housing of the burner chamber by means of gluing.
dadurch gekennzeichnet,
daß die Brennerplatte aus temperaturbeständigen Fasern, insbesondere keramischen Fasern aus dem System Al2O3 - SiO2, aus SiC-Fasern oder aus Metallfasern besteht.Radiant gas burner according to claims 1 to 7,
characterized,
that the burner plate consists of temperature-resistant fibers, in particular ceramic fibers from the Al 2 O 3 - SiO 2 system , SiC fibers or metal fibers.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19545504 | 1995-12-06 | ||
| DE19545504A DE19545504A1 (en) | 1995-12-06 | 1995-12-06 | Radiant gas burner with a burner plate made of fiber material and reduced noise |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0778442A2 true EP0778442A2 (en) | 1997-06-11 |
| EP0778442A3 EP0778442A3 (en) | 1998-12-30 |
| EP0778442B1 EP0778442B1 (en) | 2004-09-22 |
Family
ID=7779346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96115758A Expired - Lifetime EP0778442B1 (en) | 1995-12-06 | 1996-10-02 | Radiant gas burner with burner plate of fibre material and reduced noise generation |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5800157A (en) |
| EP (1) | EP0778442B1 (en) |
| JP (1) | JPH09178122A (en) |
| AT (1) | ATE277328T1 (en) |
| DE (2) | DE19545504A1 (en) |
| ES (1) | ES2229249T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113864781A (en) * | 2021-09-30 | 2021-12-31 | 武汉钢铁有限公司 | Two-end type radiant tube staged combustion device and use method |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6629837B2 (en) * | 2000-02-10 | 2003-10-07 | Philip C. Carbone | Integrated premixed indirect radiant burner |
| NZ505833A (en) * | 2000-07-19 | 2002-12-20 | Fisher & Paykel Appliances Ltd | A spiral involute gas burner housing with reconfigurable jet mounted below burner assembly |
| DE10041472C1 (en) * | 2000-08-24 | 2002-04-18 | Schott Glas | Gas radiant burner |
| DE10252821A1 (en) * | 2002-10-25 | 2004-05-13 | Karl Eberl | Device for generating, storing and giving off heat to a room to be heated |
| US20050053816A1 (en) * | 2002-11-15 | 2005-03-10 | Anuj Bhargava | Burner for combusting the anode exhaust gas stream in a PEM fuel cell power plant |
| US20070009847A1 (en) * | 2005-07-05 | 2007-01-11 | Tsen-Tung Wu | Gas burner |
| ITTO20050685A1 (en) * | 2005-09-30 | 2007-04-01 | Indesit Co Spa | COOKTOP WITH GAS BURNER INCLUDING A SEMIPERMEABLE ELEMENT |
| US9670339B1 (en) | 2016-06-22 | 2017-06-06 | Byk Usa Inc. | Process of manufacturing thickeners and the use of thus produced thickeners in high-viscosity epoxy resin formulations |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5114284A (en) * | 1988-02-16 | 1992-05-19 | Keizer Gregory J | Heater for asphalt pavement or the like |
| US5306140A (en) * | 1976-04-07 | 1994-04-26 | Smith Thomas M | Infra-red generation |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3173470A (en) * | 1961-11-17 | 1965-03-16 | Gen Precision Inc | Gas-fueled radiant heater |
| NL176301C (en) * | 1974-08-24 | Schwank Gmbh | APPLIANCE WITH AT LEAST ONE GAS BURNER FOR A HOB. | |
| US4500283A (en) * | 1976-04-07 | 1985-02-19 | Smith Thomas M | Infra-red generators and use |
| US5046944A (en) * | 1979-11-16 | 1991-09-10 | Smith Thomas M | Infra-red generation |
| US4673349A (en) * | 1984-12-20 | 1987-06-16 | Ngk Insulators, Ltd. | High temperature surface combustion burner |
| US5464346A (en) * | 1994-09-30 | 1995-11-07 | Mersden Manufacturing Co. | Infra-red heater for treating substrates |
-
1995
- 1995-12-06 DE DE19545504A patent/DE19545504A1/en not_active Withdrawn
-
1996
- 1996-10-02 AT AT96115758T patent/ATE277328T1/en not_active IP Right Cessation
- 1996-10-02 DE DE59611094T patent/DE59611094D1/en not_active Expired - Fee Related
- 1996-10-02 ES ES96115758T patent/ES2229249T3/en not_active Expired - Lifetime
- 1996-10-02 EP EP96115758A patent/EP0778442B1/en not_active Expired - Lifetime
- 1996-12-05 JP JP8325707A patent/JPH09178122A/en active Pending
- 1996-12-05 US US08/760,991 patent/US5800157A/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5306140A (en) * | 1976-04-07 | 1994-04-26 | Smith Thomas M | Infra-red generation |
| US5114284A (en) * | 1988-02-16 | 1992-05-19 | Keizer Gregory J | Heater for asphalt pavement or the like |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113864781A (en) * | 2021-09-30 | 2021-12-31 | 武汉钢铁有限公司 | Two-end type radiant tube staged combustion device and use method |
| CN113864781B (en) * | 2021-09-30 | 2023-08-18 | 武汉钢铁有限公司 | Two-end radiant tube staged combustion device and use method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| US5800157A (en) | 1998-09-01 |
| DE19545504A1 (en) | 1997-06-12 |
| EP0778442A3 (en) | 1998-12-30 |
| EP0778442B1 (en) | 2004-09-22 |
| JPH09178122A (en) | 1997-07-11 |
| ES2229249T3 (en) | 2005-04-16 |
| DE59611094D1 (en) | 2004-10-28 |
| ATE277328T1 (en) | 2004-10-15 |
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