EP1912021B1 - Combustion chamber equipped with a burner - Google Patents

Combustion chamber equipped with a burner Download PDF

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Publication number
EP1912021B1
EP1912021B1 EP07101283A EP07101283A EP1912021B1 EP 1912021 B1 EP1912021 B1 EP 1912021B1 EP 07101283 A EP07101283 A EP 07101283A EP 07101283 A EP07101283 A EP 07101283A EP 1912021 B1 EP1912021 B1 EP 1912021B1
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EP
European Patent Office
Prior art keywords
combustion chamber
section
tubular extension
cross
partially
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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.)
Not-in-force
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EP07101283A
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German (de)
French (fr)
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EP1912021A1 (en
Inventor
Jakob Hermann
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Individual
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Individual
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23LSUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L5/00Blast-producing apparatus before the fire
    • F23L5/02Arrangements of fans or blowers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23MCASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M20/00Details of combustion chambers, not otherwise provided for, e.g. means for storing heat from flames
    • F23M20/005Noise absorbing means

Definitions

  • the present invention relates to a burner provided with a combustion chamber according to the preamble of the independent claim.
  • a combustion chamber is well known in the form of heaters.
  • the prior art include the EP 0 896 192 A2 , which shows a combustion chamber according to the preamble, and the WO 02/29319 A1 , in which a tubular extension is provided for a fuel-air mixture whose free flow cross-section increases counter to the flow direction. Basically, that is at the EP 0 896 192 A2 even so, there draws graphically a fuel inlet opening into a Venturi tube.
  • the state of the art also includes the DE 10 2004 006 647 A1 and the DE 102 02 702 A1 in which, however, the just mentioned flow cross-section of the tubular extension is made constant.
  • thermoacoustic oscillations or self-excited combustion oscillations which should be avoided, which is thus an object of the present invention.
  • the invention can be used for all different combustion chambers or Schuetzettitypen.- ie manufacturer and construction type independent.
  • the achievable by the invention effect is in a significantly quiet work of appropriately designed combustion systems, heaters or firing equipment such.
  • process gas heater convection heater, room heater, domestic water heater, circulating water heater with and without hot water, directly heated storage and even boiler with and without Saugzug- or pressure fan and chemical process gas heater and drive systems, so that these devices without unreasonable noise levels for the site, such.
  • work living or basement rooms or other locations, can be put into operation.
  • an extension is mounted or plugged according to the invention to the wall of the heater or the combustion chamber.
  • the invention works best in tubular systems.
  • the invention is based on an inventive improvement of a prior invention according to the DE patent application 102 02 702.1 , For the measure to work, it can be designed according to one of the nine exemplary embodiments of the invention as follows:
  • a gas or oil fired combustion system with a combustion chamber or heater 18 has on one side of its housing 24 an inlet 19 for air from the atmosphere or oxidant from any source and on the other side an exhaust gas outlet 20.
  • the fuel-air mixture formed in the mixture formation section 9 is fed via a blower 10 and a connecting section 11 to a tumble burner 12, which can be designed, for example, in the form of a burner plate, and burned there in the combustion chamber 13 of the heating device 18.
  • FIG. 1 shows by way of example a combustion system or heater 18 with a burner 10 burning from top to bottom.
  • the invention can be used in a combustion system or heater with a burnable burner 12 in any direction.
  • the combustion chamber 13 is followed by a heat exchanger 14, via which the heat energy generated by the flame 35 can be transferred to a medium, for example water, and made available to a heating circuit, for example in a residential building.
  • a condensate tray 15 or an exhaust gas deflector 15 is provided on the housing 24 of the heater 18.
  • a condensate tray is needed on a condensing boiler where the exhaust gases of the burner are cooled below the condensation point when passing through the heat exchanger, an exhaust gas diversion on all other units.
  • upstream of the air inlet 19 is a tubular extension 22 with its outlet 26 according to Fig. 1 a on, on or attached, according to Fig. 1b Flanged, mounted or otherwise attached, also on the outer casing of the heater.
  • Fig. 1 a on, on or attached, according to Fig. 1b Flanged, mounted or otherwise attached, also on the outer casing of the heater.
  • Fig. 1b Flanged, mounted or otherwise attached
  • the situation is different when a wedge-shaped extension 7, which is filled with a sound-absorbing or similar sound-damping material 2, is introduced into the tubular extension 22.
  • the cross-sectional shape (perpendicular to the drawing plane) of the wedge-shaped extension 7 can be arbitrary, For example, semicircular, square, rectangular, triangular, semi-oval, etc. It is only essential that the extension 7, if possible starting with a step 25, unilaterally reduces the cross-section of the tubular extension 22 in the direction of the outlet 26, ie in the flow direction 34.
  • extension 6 of the wedge-shaped extension 7 proved more or less constant cross-section, which should also be filled with sound-absorbing material 3 and which is upstream of the stage 25, so this forms at the beginning.
  • the cross section of the extension 6 can also be designed arbitrarily, but should suitably correspond in the shape of the extension 7. Instead of a step 25, another transition from the wide end of the wedge in the direction of the inlet 21 can take place.
  • a further improvement of the effect of the tubular extension 22 can be further achieved by a suitable design of the remaining of the combustion air flowed through the free area.
  • a continuous reduction in cross-section of the flow-through cross-sectional area 27 (perpendicular to the plane of the drawing plane) from the outlet 26 in the direction of the new inlet 21, ie opposite to the flow direction 34.
  • Which form the free flow cross-section 27 in detail along the tubular extension 22 occupies is not relevant.
  • the cross-sectional area may, for example, also change from a round shape into an oval, rectangular, triangular or other shape over the length of the tubular extension 22. Interruptions of the continuous reduction in cross section are possible, but should remain below 50% of the total length of the tubular extension 22 in their length.
  • FIG. 2 shows a slightly exponential.
  • FIG. 3 shows a slightly bulbous transitional shape.
  • a trumpet-shaped or otherwise designed extension 36 which extends opposite to the flow direction 34.
  • the length 37 of the extension 36 should occupy less than 25% of the total length 38 of the tubular extension 22.
  • the extension 36 is essentially the easier suction of air into the heater 18th
  • wedge-shaped extension 7 can not only be mounted on one side, but, as in FIG. 5 shown, also on two opposite sides, on several sides with interruptions or even circumferentially with cylindrical but also differently shaped pipe opening or cross-sectional area 27 in the central axis 28 of the tubular extension 22, through which the combustion air is sucked executed.
  • the length 32 of the wedge-shaped extension 7 should be at least five times the root of the smallest free and air-flow cross-sectional area 27 of the tubular extension 22.
  • the wall of the extension 7 should preferably be made of dimensionally stable plastic. However, it is also possible a version made of metal or similar material. As structurally favorable, a dimensionally stable wall has proven in each case.
  • the extension 7 In order to achieve the full damping effect on the thermoacoustic oscillations, the extension 7 must be mounted as close to the mixture formation section 9, that is to be arranged as close to the inlet 19 of the fuel assembly 9. Further, the length 33 of the pipe section 1 of the tubular extension 22 should be made greater than the length 31 of the pipe section 5, which corresponds to the distance between the end of the wedge-shaped extension 7 and the inlet 19 of the fuel assembly 9. The pipe section 5 can even be completely eliminated.
  • the length 33 of the tube section 1 of the tubular extension 22 should, if possible, be at least as long as the length 32 of the wedge-shaped extension 7.
  • the length 32 of the wedge-shaped extension 7 should at least 5 times the root of the smallest free and air flow cross-sectional area 27 of tubular extension 22 amount.
  • FIG. 6 shows a variant of the embodiment FIG. 1 ,
  • the tubular extension 22 is designed as a deflection 4, which opens into the extension 7 in the flow direction.
  • the entire arrangement can here be made of a single part, for example, a rectangular box perpendicular to the plane, in which a separating web 23 is introduced and in the inlet 21 air is sucked, which is transported by a rectangular cross-section, through the deflection 4 flows and then flows again in a rectangular cross-section filled with sound-absorbing or sound-damping material 2 and 3 expansion 6 and 7, then to flow into the mixture formation section 9.
  • the divider 23 is angled accordingly installed in the tubular extension 22. As a result, sound vibrations are ideally avoided.
  • To improve the inflow of the inlet 21 may be provided with a half-trumpet-shaped extension 36.
  • FIG. 7 Another embodiment shows FIG. 7 , Here is opposite to the execution in FIG. 6 the more or less constant cross-section with sound-absorbing or sound-absorbing material 3 filled extension 6 on the deflection 4 pulled away in the direction of the inlet 21, whereby a further improvement of the vibration damping is achieved.
  • the tubular extension 22 does not necessarily have to be straight, that is to say designed as a cylindrical tube. This can rather be designed as a manifold, spiral or the like and thus assume any shape. The same applies to the filled with sound-absorbing or sound-absorbing material 2 extension 7. This can also be incorporated into a manifold, spiral, helical or other arcuate structure. It is only necessary to ensure that the filled with sound-absorbing or sound-absorbing material wedge-shaped extension in the flow direction of the air, ie in the direction of the mixture formation section 9 decreases in cross-section.
  • the change in cross section of the wedge-shaped extension does not have to be continuous, that is to say, sections with a constant cross section or even small enlargements may occur, provided these do not nullify the wedge-shaped character as a whole. Also possible is a wedge with a blunt tip, while the wedge character must be preserved.
  • the free air-flowed cross-section 27 of the tubular extension 22 should always apply that this tapers in the direction of the inlet 21 and the cross-section decreases.
  • the smallest cross section of the tubular extension 22 should be as close as possible to the inlet 21 and max. only 75% of the cross section at the outlet 26 amount. It is not hindering for the invention if the free air flow cross section of the tubular extension 22 at the outlet 26 is greater than the free air flow cross section at the old inlet 19 of the heater 18. It is also not cumbersome if the decrease in the free air-flow cross-section 27 from the outlet 26 in the direction of the inlet 21 of the tubular extension 22 is not continuous, but is more or less interrupted. It is only important that at least 50% of the total length 38 of the tubular extension 22 has a directed against the flow direction 34 continuous or stepped decrease in the free air flow cross-section 27 in the whole.
  • FIG. 8 shows another variant as a 3D cut, as they would be practicable.
  • the constant cross section of the tubular extension 22 and the separating web 23 can be seen very well.
  • FIG. 9 shows an embodiment in which individual wedge-shaped extensions 7 are pneumatically connected in series and are connected between the extensions line sections with a constant cross-section.
  • the fuel air mixture can consist of both gas (natural gas or LPG) or oil mist (small droplets) in conjunction with air.
  • the heater can also be operated with solid or dusty fuel.
  • the filled with sound-absorbing or sound-absorbing material 2, 3 wedge-shaped extension 7 and extension 6 is designed so that the cross section of passing them or passing through them air line is not affected.
  • the tubular extension (22) may at least partially be formed by an outer wall of the heater or by a housing partially enclosing the combustion chamber.
  • number description 1 Pipe section in front of the wedge 2 acoustic damping material 3 acoustic damping material 4 redirection 5 Pipe after the damping wedge 6 renewal 7 wedge-shaped extension 8th
  • Fuel supply device 9 Mixture formation section or fuel fitting 10 fan 11 access link 12 burner 13 combustion chamber 14 heat exchangers 15 Condensate tray or exhaust diverter 16 condensate drain 17 exhaust system 18 Combustion system or heater 19 Air supply or oxidation or even inlet 20 Exhaust outlet or jointlynauslrawö réelle 21 new intake for air 22 Pipe-like extension 23 divider 24 casing 25 step 26
  • Outlet of the tubular extension 22nd 27 Air flow cross section of the extension 22 28
  • Central axis of the tubular extension 22nd 29 not used 30 not used 31 Length of pipe 5 32 Length of the wedge 7 33 Length of pipe 1 34 flow direction 35 flame 36 Trumpet-shaped or

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

Description

Die vorliegende Erfindung bezieht sich auf eine mit einem Brenner versehene Verbrennungskammer gemäß dem Oberbegriff des unabhängigen Patentanspruchs. Eine solche Verbrennungskammer ist in Form von Heizgeräten allgemein bekannt.The present invention relates to a burner provided with a combustion chamber according to the preamble of the independent claim. Such a combustion chamber is well known in the form of heaters.

Insbesondere gehören zum Stand der Technik die EP 0 896 192 A2 , die eine Verbrennungskammer nach dem Oberbegriff zeigt, und die WO 02/29319 A1 , bei der eine rohrförmige Verlängerung für ein Brennstoff-Luft-Gemisch vorgesehen ist, deren freier durchströmter Querschnitt entgegen der Strömungsrichtung zunimmt. Grundsätzlich ist das bei der EP 0 896 192 A2 auch so, dort ragt zeichnerisch eine Brennstoffeinlassöffnung in ein Venturirohr hinein.In particular, the prior art include the EP 0 896 192 A2 , which shows a combustion chamber according to the preamble, and the WO 02/29319 A1 , in which a tubular extension is provided for a fuel-air mixture whose free flow cross-section increases counter to the flow direction. Basically, that is at the EP 0 896 192 A2 even so, there draws graphically a fuel inlet opening into a Venturi tube.

Zum Stand der Technik gehören außerdem die DE 10 2004 006 647 A1 und die DE 102 02 702 A1 , bei denen jedoch der gerade erwähnte Strömungsquerschnitt der rohrförmigen Verlängerung konstant gestaltet ist.The state of the art also includes the DE 10 2004 006 647 A1 and the DE 102 02 702 A1 in which, however, the just mentioned flow cross-section of the tubular extension is made constant.

Bei konventionellen Verbrennungskammern treten häufig thermoakustische Schwingungen bzw. selbsterregte Verbrennungsschwingungen auf, die es zu vermeiden gilt, was somit Aufgabe der vorliegenden Erfindung ist.In conventional combustion chambers frequently occur thermoacoustic oscillations or self-excited combustion oscillations, which should be avoided, which is thus an object of the present invention.

Die Lösung der Aufgabe besteht erfindungsgemäß in den Merkmalen des unabhängigen Patentanspruchs 1.The object is achieved according to the invention in the features of independent claim 1.

Die Erfindung kann dabei für alle verschiedenen Verbrennungskammern oder Heizgerätetypen.- also hersteller- und bauartunabhängig - eingesetzt werden.The invention can be used for all different combustion chambers or Heizgerätetypen.- ie manufacturer and construction type independent.

Der durch die Erfindung erzielbare Effekt liegt in einem signifikant leisen Arbeiten der entsprechend konzipierten Verbrennungssysteme, Heizgeräte oder Feuerungseinrichtungen, wie z. B. Prozeßgaserhitzer, Umluftheizer, Raumheizer, Brauchwasserdurchlauferhitzer, Umlaufwasserheizer mit und ohne Brauchwassererwärmung, direkt beheizte Speicher und sogar Kessel mit und ohne Saugzug- oder Druckgebläse sowie chemische Prozeßgaserhitzer und Antriebssysteme, so daß diese Geräte ohne unzumutbare Schallbelastungen für den Aufstellungsort, z. B. Arbeits-, Wohn- oder Kellerräume oder sonstige Standorte, in Betrieb genommen werden können.The achievable by the invention effect is in a significantly quiet work of appropriately designed combustion systems, heaters or firing equipment such. As process gas heater, convection heater, room heater, domestic water heater, circulating water heater with and without hot water, directly heated storage and even boiler with and without Saugzug- or pressure fan and chemical process gas heater and drive systems, so that these devices without unreasonable noise levels for the site, such. As work, living or basement rooms or other locations, can be put into operation.

Hierzu wird eine Verlängerung gemäß der Erfindung an die Wandung des Heizgeräts oder der Verbrennungskammer montiert oder gesteckt. Am besten wirkt die Erfindung bei rohrartigen Systemen.For this purpose, an extension is mounted or plugged according to the invention to the wall of the heater or the combustion chamber. The invention works best in tubular systems.

Weitere Ausgestaltungen der Erfindung gehen aus den Merkmalen der abhängigen Vorrichtungspatentansprüche hervor.Further embodiments of the invention will become apparent from the features of the dependent device patent claims.

Die Erfindung basiert auf einer erfinderischen Verbesserung einer vorausgehenden Erfindung gemäß der DE-Patentanmeldung 102 02 702.1 . Damit die Maßnahme funktioniert, kann diese nach einem der neun Ausführungsbeispiele der Erfindung wie folgt ausgeführt sein:The invention is based on an inventive improvement of a prior invention according to the DE patent application 102 02 702.1 , For the measure to work, it can be designed according to one of the nine exemplary embodiments of the invention as follows:

Die Erfindung ist nachfolgend anhand der Figuren 1 bis 9 der Zeichnungen näher erläutert. Es zeigen:

Fig. 1
ein Verbrennungssystem in einer Prinzipdarstellung,
Fig. 1 a
ein Detail,
Fig. 1b
ein weiteres Detail,
Fig. 2
eine Variante hierzu,
Fig. 3
eine weitere Variante,
Fig. 4
eine dritte Variante,
Fig. 5
eine vierte Variante,
Fig. 6
eine fünfte Variante,
Fig. 7
eine siebte Variante,
Fig. 8
eine räumliche Ansicht einer möglichen praktischen Ausführung und
Fig. 9
eine achte Variante.
The invention is described below with reference to FIGS. 1 to 9 explained in more detail in the drawings. Show it:
Fig. 1
a combustion system in a schematic representation,
Fig. 1 a
a detail,
Fig. 1b
another detail,
Fig. 2
a variant of this,
Fig. 3
another variant,
Fig. 4
a third variant,
Fig. 5
a fourth variant,
Fig. 6
a fifth variant,
Fig. 7
a seventh variant,
Fig. 8
a spatial view of a possible practical implementation and
Fig. 9
an eighth variant.

In allen Figuren bedeuten gleiche Bezugszeichen jeweils die gleichen Einzelheiten.In all figures, the same reference numerals mean the same details.

Ein gas- oder ölbeheiztes Verbrennungssystem mit einer Verbrennungskammer oder Heizgerät 18 weist auf der einen Seite seines Gehäuses 24 einen Einlaß 19 für Luft aus der Atmosphäre oder Oxidant aus einer beliebigen Quelle und auf der anderen Seite einen Abgasauslaß 20 auf. Auf den Einlaß 19 folgt in Richtung des Luftstromes eine Gemischbildungsstrecke bzw. Brennstoffarmatur 9, in die über einen Anschluß 8 fester, staubförmiger, flüssiger oder gasförmiger Brennstoff der über den Einlaß 19 angesaugten Luft beigemischt wird. Das in der Gemischbildungsstrecke 9 gebildete Brennstoff-Luft-Gemisch wird über ein Gebläse 10 und eine Anschlußstrecke 11 einem Sturzbrenner 12, der zum Beispiel in Form einer Brennerplatte ausgeführt sein kann, zugeführt und dort im Brennraum 13 des Heizgerätes 18 verbrannt.A gas or oil fired combustion system with a combustion chamber or heater 18 has on one side of its housing 24 an inlet 19 for air from the atmosphere or oxidant from any source and on the other side an exhaust gas outlet 20. On the inlet 19 follows in the direction of the air flow, a mixture formation path or fuel fitting 9, in which via a terminal 8 solid, dusty, liquid or gaseous fuel is added via the inlet 19 sucked air. The fuel-air mixture formed in the mixture formation section 9 is fed via a blower 10 and a connecting section 11 to a tumble burner 12, which can be designed, for example, in the form of a burner plate, and burned there in the combustion chamber 13 of the heating device 18.

Figur 1 zeigt beispielhaft ein Verbrennungssystem oder Heizgerät 18 mit einem von oben nach unten brennenden Brenner 12. Die Erfindung kann jedoch bei einem Verbrennungssystem oder Heizgerät mit einem in beliebiger Richtung brennenden Brenner 12 eingesetzt werden. Auf den Brennraum 13 folgt ein Wärmetauscher 14, über den die von der Flamme 35 erzeugte Wärmeenergie auf ein Medium, zum Beispiel Wasser, übertragen und einem Heizkreislauf, zum Beispiel in einem Wohnhaus, zur Verfügung gestellt werden kann. Unterhalb des Wärmetauschers 14 ist eine Kondensatwanne 15 oder eine Abgasumlenkung 15 am Gehäuse 24 des Heizgerätes 18 vorgesehen. Eine Kondensatwanne wird bei einem Brennwertgerät benötigt, bei dem die Abgase des Brenners beim Passieren des Wärmetauschers unter den Kondensationspunkt abgekühlt wird, eine Abgasumlenkung bei allen anderen Geräten. Bei einem anderweitig ausgestalteten Brenner kann auch die Kondensatwanne bzw. Abgasumlenkung 15 entfallen. Hiervon wird die Wirkung der Erfindung nicht beeinflußt. Im Falle der Ausbildung des Heizgerätes als Brennwertgerät folgt nach der Kondensatwanne 15 in Strömungsrichtung der Abgase bzw. des Kondensates noch ein Kondensatablauf 16 und anschließend eine Abgasstrecke 17 mit Atmosphärenauslaßöffnung 20. FIG. 1 shows by way of example a combustion system or heater 18 with a burner 10 burning from top to bottom. However, the invention can be used in a combustion system or heater with a burnable burner 12 in any direction. The combustion chamber 13 is followed by a heat exchanger 14, via which the heat energy generated by the flame 35 can be transferred to a medium, for example water, and made available to a heating circuit, for example in a residential building. Below the heat exchanger 14, a condensate tray 15 or an exhaust gas deflector 15 is provided on the housing 24 of the heater 18. A condensate tray is needed on a condensing boiler where the exhaust gases of the burner are cooled below the condensation point when passing through the heat exchanger, an exhaust gas diversion on all other units. In an otherwise configured burner and the condensate pan or exhaust deflector 15 can be omitted. This does not affect the effect of the invention. In the case of the formation of the heater as a condensing boiler is followed by the condensate tray 15 in the flow direction of the exhaust gases and the condensate still a condensate drain 16 and then an exhaust line 17 with Atmosphärenauslaßöffnung 20th

Nach dem Ausführungsbeispiel gemäß Figur 1 wird stromauf des Lufteinlasses 19 eine rohrartige Verlängerung 22 mit ihrem Auslaß 26 gemäß Fig. 1 a an-, ein- oder aufgesteckt, gemäß Fig. 1b angeflanscht, anmontiert oder sonst wie befestigt, auch am Außengehäuse des Heizgerätes. Über diese wird nun der bisherige Lufteinlaß 19 verlängert und damit die für die Verbrennung erforderliche Luft über den neuen Einlaß 21 angesaugt. Derartige Rohrverlängerungen sind in der Praxis schon bekannt und erweisen sich zur Dämpfung von Verbrennungsschwingungen als mäßig geeignet bis ungeeignet.According to the embodiment according to FIG. 1 upstream of the air inlet 19 is a tubular extension 22 with its outlet 26 according to Fig. 1 a on, on or attached, according to Fig. 1b Flanged, mounted or otherwise attached, also on the outer casing of the heater. About this now the previous air inlet 19 is extended and thus sucked the air required for the combustion of the new inlet 21. Such pipe extensions are already known in practice and prove to dampen combustion oscillations as moderately suitable to unsuitable.

Anders sieht es aus, wenn in die rohrartige Verlängerung 22 eine keilförmige Erweiterung 7 eingebracht wird, die mit einem schallabsorbierenden oder ähnlichen schalldämpfenden Material 2 ausgefüllt ist. Die Querschnittsform (senkrecht zur Zeichenblattebene verlaufend) der keilförmigen Erweiterung 7 kann dabei beliebig sein, beispielsweise halbrund, quadratisch, rechteckig, dreieckig, halboval, usw. wesentlich ist nur, daß die Erweiterung 7, möglichst mit einer Stufe 25 beginnend, einseitig den Querschnitt der rohrartigen Verlängerung 22 in Richtung des Auslaß 26, also in Strömungsrichtung 34, stetig verkleinert. Als günstig bzw. dämpfungsförderlich hat sich eine weitere Verlängerung 6 der keilförmigen Erweiterung 7 mit mehr oder weniger konstantem Querschnitt erwiesen, die ebenfalls mit schallabsorbierendem Material 3 ausgefüllt sein sollte und die sich stromauf der Stufe 25 befindet, also diese am Anfang bildet. Der Querschnitt der Verlängerung 6 kann ebenfalls beliebig gestaltet sein, sollte aber günstigerweise in der Formgebung der der Erweiterung 7 entsprechen. Anstelle einer Stufe 25 kann auch ein anderweitiger Übergang vom breiten Ende des Keils in Richtung des Einlasses 21 erfolgen.The situation is different when a wedge-shaped extension 7, which is filled with a sound-absorbing or similar sound-damping material 2, is introduced into the tubular extension 22. The cross-sectional shape (perpendicular to the drawing plane) of the wedge-shaped extension 7 can be arbitrary, For example, semicircular, square, rectangular, triangular, semi-oval, etc. It is only essential that the extension 7, if possible starting with a step 25, unilaterally reduces the cross-section of the tubular extension 22 in the direction of the outlet 26, ie in the flow direction 34. As favorable or Dämpfungsförderlich has a further extension 6 of the wedge-shaped extension 7 proved more or less constant cross-section, which should also be filled with sound-absorbing material 3 and which is upstream of the stage 25, so this forms at the beginning. The cross section of the extension 6 can also be designed arbitrarily, but should suitably correspond in the shape of the extension 7. Instead of a step 25, another transition from the wide end of the wedge in the direction of the inlet 21 can take place.

Eine weitere Verbesserung der Wirkung der rohrartigen Verlängerung 22 läßt sich ferner durch eine geeignete Gestaltung der verbleibenden von der Verbrennungsluft durchströmten freien Fläche erreichen. Ideal ist dabei eine kontinuierliche Querschnittsabnahme der durchströmten Querschnittsfläche 27 (senkrecht zur Zeichenblattebene verlaufend) vom Auslaß 26 in Richtung des neuen Einlaß 21, also entgegen der Strömungsrichtung 34. Welche Form dabei der freie durchströmte Querschnitt 27 im einzelnen entlang der rohrartigen Verlängerung 22 einnimmt ist nicht relevant. Die Querschnittsfläche kann sich z.B. auch von einer runden Form in eine ovale, rechteckige, dreieckige oder auch andere Form über die Länge der rohrartigen Verlängerung 22 wandeln. Unterbrechungen der kontinuierlichen Querschnittsabnahme sind möglich, sollten jedoch in ihrer Länge unter 50% der Gesamtlänge der rohrartigen Verlängerung 22 bleiben. Als möglich jedoch nicht so wirksam haben sich andere nichtkontinuierliche Querschnittsreduzierungen vom Auslaß 26 in Richtung des Einlaß 21 erwiesen. Zum Beispiel kann die Querschnittsreduzierung, wie in Figur 2 dargestellt, leicht exponentiell vonstatten gehen. Figur 3 zeigt eine leicht bauchige Übergangsform. Nicht hinderlich sondern sogar förderlich für die Erfindung ist es, wenn die neue Einlaßöffnung 21, wie in Figur 4 dargestellt, eine trompetenförmige oder auch anders gestaltete Erweiterung 36 aufweist, die sich entgegen der Strömungsrichtung 34 erstreckt. Die Länge 37 der Erweiterung 36 sollte jedoch weniger als 25% der Gesamtlänge 38 der rohrartigen Verlängerung 22 einnehmen. Die Erweiterung 36 dient im wesentlichen der leichteren Ansaugung der Luft ins Heizgerät 18.A further improvement of the effect of the tubular extension 22 can be further achieved by a suitable design of the remaining of the combustion air flowed through the free area. Ideally, a continuous reduction in cross-section of the flow-through cross-sectional area 27 (perpendicular to the plane of the drawing plane) from the outlet 26 in the direction of the new inlet 21, ie opposite to the flow direction 34. Which form the free flow cross-section 27 in detail along the tubular extension 22 occupies is not relevant. The cross-sectional area may, for example, also change from a round shape into an oval, rectangular, triangular or other shape over the length of the tubular extension 22. Interruptions of the continuous reduction in cross section are possible, but should remain below 50% of the total length of the tubular extension 22 in their length. As possible, but not so effective, other non-continuous cross-sectional reductions have been found from the outlet 26 towards the inlet 21. For example, the cross-sectional reduction as in FIG. 2 shown, slightly exponential. FIG. 3 shows a slightly bulbous transitional shape. Not hindering but even conducive to the invention is when the new inlet opening 21, as in FIG. 4 shown, a trumpet-shaped or otherwise designed extension 36 which extends opposite to the flow direction 34. However, the length 37 of the extension 36 should occupy less than 25% of the total length 38 of the tubular extension 22. The extension 36 is essentially the easier suction of air into the heater 18th

Die in Figur 1 bis 4 gezeigte keilförmige Erweiterung 7 kann nicht nur einseitig angebracht sein, sondern, wie in Figur 5 dargestellt, auch auf zwei gegenüberliegenden Seiten, mehrseitig mit Unterbrechungen oder sogar umlaufend mit zylindrischer aber auch anders gestalteter Rohröffnung bzw. Querschnittsfläche 27 in der Mittelachse 28 der rohrartigen Verlängerung 22, durch die die Verbrennungsluft angesaugt wird, ausgeführt sein. Um eine gute Wirkung zu erzielen, sollte die Länge 32 der keilförmigen Erweiterung 7 mindestens fünf mal die Wurzel aus der kleinsten freien und luftdurchströmten Querschnittsfläche 27 der rohrartigen Verlängerung 22 betragen. Die Wandung der Erweiterung 7 sollte vorzugsweise aus formstabilem Kunststoff ausgeführt sein. Möglich ist jedoch auch eine Ausführung aus Metall oder ähnlichem Material. Als konstruktiv günstig hat sich in jedem Fall eine formstabile Wandung erwiesen. Eine andere Ausführung der Wandung ist jedoch auch denkbar. Wie auch schon bei der Figur 1 bis 4 beschrieben, läßt sich die Wirkung der keilförmigen Erweiterungen 7 in Figur 5 durch eine stetige Verkleinerung der freien Querschnittsfläche 27 der rohrartigen Verlängerung 22 von deren Auslaß 26 in Richtung des Einlasses 21, also entgegen der Strömungsrichtung 34 der zugeführten Verbrennungsluft, erreichen.In the Figure 1 to 4 shown wedge-shaped extension 7 can not only be mounted on one side, but, as in FIG. 5 shown, also on two opposite sides, on several sides with interruptions or even circumferentially with cylindrical but also differently shaped pipe opening or cross-sectional area 27 in the central axis 28 of the tubular extension 22, through which the combustion air is sucked executed. In order to obtain a good effect, the length 32 of the wedge-shaped extension 7 should be at least five times the root of the smallest free and air-flow cross-sectional area 27 of the tubular extension 22. The wall of the extension 7 should preferably be made of dimensionally stable plastic. However, it is also possible a version made of metal or similar material. As structurally favorable, a dimensionally stable wall has proven in each case. Another embodiment of the wall is also conceivable. As with the Figure 1 to 4 described, the effect of the wedge-shaped extensions 7 in FIG. 5 by a continuous reduction of the free cross-sectional area 27 of tube-like extension 22 of the outlet 26 in the direction of the inlet 21, ie opposite to the flow direction 34 of the supplied combustion air, reach.

Um die volle Dämpfungswirkung auf die thermoakustischen Schwingungen zu erzielen, muß die Erweiterung 7 möglichst nahe an der Gemischbildungsstrecke 9 montiert sein, das heißt, möglichst nahe am Einlaß 19 der Brennstoffarmatur 9 angeordnet sein. Ferner sollte die Länge 33 des Rohrabschnitts 1 der rohrartigen Verlängerung 22 größer als die Länge 31 des Rohrabschnitts 5 ausgeführt werden, die dem Abstand zwischen dem Ende der keilförmigen Erweiterung 7 und dem Einlaß 19 der Brennstoffarmatur 9 entspricht. Das Rohrstück 5 kann sogar vollständig entfallen. Die Länge 33 des Rohrabschnitts 1 der rohrartigen Verlängerung 22 sollte, wenn möglich, mindestens so lang sein wie die Länge 32 der keilförmigen Erweiterung 7. Die Länge 32 der keilförmigen Erweiterung 7 sollte mindestens 5 mal die Wurzel aus der kleinsten freien und luftdurchströmten Querschnittsfläche 27 der rohrartigen Verlängerung 22 betragen.In order to achieve the full damping effect on the thermoacoustic oscillations, the extension 7 must be mounted as close to the mixture formation section 9, that is to be arranged as close to the inlet 19 of the fuel assembly 9. Further, the length 33 of the pipe section 1 of the tubular extension 22 should be made greater than the length 31 of the pipe section 5, which corresponds to the distance between the end of the wedge-shaped extension 7 and the inlet 19 of the fuel assembly 9. The pipe section 5 can even be completely eliminated. The length 33 of the tube section 1 of the tubular extension 22 should, if possible, be at least as long as the length 32 of the wedge-shaped extension 7. The length 32 of the wedge-shaped extension 7 should at least 5 times the root of the smallest free and air flow cross-sectional area 27 of tubular extension 22 amount.

Figur 6 zeigt eine Variante der Ausführung nach Figur 1. Hier ist die rohrartige Verlängerung 22 als Umlenkung 4 ausgeführt, die in Strömungsrichtung in die Erweiterung 7 mündet. Die gesamte Anordnung kann hier aus einem einzigen Teil, zum Beispiel einem senkrecht zur Blattebene rechteckigen Kasten, gefertigt werden, in den ein Trennsteg 23 eingebracht ist und in den am Einlaß 21 Luft angesaugt wird, die durch einen rechteckigen Querschnitt transportiert wird, durch die Umlenkung 4 strömt und anschließend wieder in einem rechteckigen Querschnitt die mit schallabsorbierendem oder schalldämpfendem Material 2 und 3 gefüllte Erweiterung 6 und 7 entlangströmt, um dann in die Gemischbildungsstrecke 9 einzuströmen. Um vom Auslaß 26 in Richtung des neuen Einlasses 21 eine stetige Abnahme des freien luftdurchströmten Querschnitts 27 zu erhalten, ist der Trennsteg 23 entsprechend abgewinkelt in die rohrartige Verlängerung 22 einzubauen. Hierdurch werden Schallschwingungen in idealer Weise vermieden. Zur Verbesserung der Zuströmung kann der Einlaß 21 mit einer halbtrompetenförmigen Erweiterung 36 versehen werden. FIG. 6 shows a variant of the embodiment FIG. 1 , Here, the tubular extension 22 is designed as a deflection 4, which opens into the extension 7 in the flow direction. The entire arrangement can here be made of a single part, for example, a rectangular box perpendicular to the plane, in which a separating web 23 is introduced and in the inlet 21 air is sucked, which is transported by a rectangular cross-section, through the deflection 4 flows and then flows again in a rectangular cross-section filled with sound-absorbing or sound-damping material 2 and 3 expansion 6 and 7, then to flow into the mixture formation section 9. In order to obtain from the outlet 26 in the direction of the new inlet 21 a steady decrease in the free air flow cross-section 27, the divider 23 is angled accordingly installed in the tubular extension 22. As a result, sound vibrations are ideally avoided. To improve the inflow of the inlet 21 may be provided with a half-trumpet-shaped extension 36.

Ein weiteres Ausführungsbeispiel zeigt Figur 7. Hier ist gegenüber der Ausführung in Figur 6 die mehr oder weniger querschnittskonstante mit schallabsorbierendem oder schalldämpfendem Material 3 gefüllte Verlängerung 6 über die Umlenkung 4 in Richtung auf den Einlass 21 hinweggezogen, wodurch eine weitere Verbesserung der Schwingungsdämpfung erreicht wird.Another embodiment shows FIG. 7 , Here is opposite to the execution in FIG. 6 the more or less constant cross-section with sound-absorbing or sound-absorbing material 3 filled extension 6 on the deflection 4 pulled away in the direction of the inlet 21, whereby a further improvement of the vibration damping is achieved.

Für die Wirkung der Erfindung muß die rohrartige Verlängerung 22 nicht zwingend gerade, sprich als Zylinderohr, ausgeführt sein. Diese kann vielmehr als Krümmer, Spirale oder ähnliches ausgeführt sein und damit eine beliebige Form annehmen. Gleiches gilt auch für die mit schallabsorbierendem oder schalldämpfendem Material 2 gefüllte Erweiterung 7. Diese kann ebenfalls in einen Krümmer, Spirale, Wendel oder sonstiges bogenförmiges Gebilde eingebracht sein. Hierbei ist nur darauf zu achten, daß die mit schallabsorbierendem oder schalldämpfendem Material gefüllte keilförmige Erweiterung in Strömungsrichtung der Luft, also in Richtung der Gemischbildungsstrecke 9 sich im Querschnitt verkleinert. Die Querschnittsveränderung der keilförmigen Erweiterung muss dabei nicht stetig sein, sprich, es dürfen Abschnitte mit konstantem Querschnitt oder sogar kleine Vergrößerungen vorkommen, soweit diese nicht den keilförmigen Charakter im Ganzen zunichte machen. Ebenfalls möglich ist ein Keil mit stumpfer Spitze, wobei der Keilcharakter erhalten bleiben muss.For the effect of the invention, the tubular extension 22 does not necessarily have to be straight, that is to say designed as a cylindrical tube. This can rather be designed as a manifold, spiral or the like and thus assume any shape. The same applies to the filled with sound-absorbing or sound-absorbing material 2 extension 7. This can also be incorporated into a manifold, spiral, helical or other arcuate structure. It is only necessary to ensure that the filled with sound-absorbing or sound-absorbing material wedge-shaped extension in the flow direction of the air, ie in the direction of the mixture formation section 9 decreases in cross-section. The change in cross section of the wedge-shaped extension does not have to be continuous, that is to say, sections with a constant cross section or even small enlargements may occur, provided these do not nullify the wedge-shaped character as a whole. Also possible is a wedge with a blunt tip, while the wedge character must be preserved.

Für den freien luftdurchströmten Querschnitt 27 der rohrartigen Verlängerung 22 sollte stets gelten, dass sich dieser in Richtung des Einlasses 21 verjüngt bzw. der Querschnitt abnimmt. Der kleinste Querschnitt der rohrartigen Verlängerung 22 sollte dabei möglichst nahe am Einlass 21 liegen und max. nur 75% des Querschnitts am Auslass 26 betragen. Es ist für die Erfindung nicht hinderlich, wenn der freie luftdurchströmte Querschnitt der rohrartigen Verlängerung 22 am Auslaß 26 größer als der freie luftdurchströmte Querschnitt am alten Einlass 19 des Heizgerätes 18 ist. Ebenfalls nicht hinderlich ist es, wenn die Abnahme des freien luftdurchströmten Querschnitts 27 vom Auslass 26 in Richtung des Einlass 21 der rohrartigen Verlängerung 22 nicht kontinuierlich vonstatten geht, sondern mehr oder weniger unterbrochen ist. Wichtig ist nur, dass im Gesamten mindestens 50% der Gesamtlänge 38 der rohrartigen Verlängerung 22 eine entgegen der Strömungsrichtung 34 gerichtete stetige oder stufenförmige Abnahme des freien luftdurchströmten Querschnitts 27 aufweist.For the free air-flowed cross-section 27 of the tubular extension 22 should always apply that this tapers in the direction of the inlet 21 and the cross-section decreases. The smallest cross section of the tubular extension 22 should be as close as possible to the inlet 21 and max. only 75% of the cross section at the outlet 26 amount. It is not hindering for the invention if the free air flow cross section of the tubular extension 22 at the outlet 26 is greater than the free air flow cross section at the old inlet 19 of the heater 18. It is also not cumbersome if the decrease in the free air-flow cross-section 27 from the outlet 26 in the direction of the inlet 21 of the tubular extension 22 is not continuous, but is more or less interrupted. It is only important that at least 50% of the total length 38 of the tubular extension 22 has a directed against the flow direction 34 continuous or stepped decrease in the free air flow cross-section 27 in the whole.

Figur 8 zeigt eine weitere Variante als 3D-Schnitt, wie sie in die Praxis umsetzbar wäre. Der konstante Querschnitt der rohrförmigen Verlängerung 22 sowie der Trennsteg 23 sind sehr gut zu erkennen. FIG. 8 shows another variant as a 3D cut, as they would be practicable. The constant cross section of the tubular extension 22 and the separating web 23 can be seen very well.

Figur 9 zeigt ein Ausführungsbeispiel, bei dem einzelne keilförmige Erweiterungen 7 pneumatisch in Serie geschaltet sind und zwischen den Erweiterungen Leitungsstücke mit konstantem Querschnitt geschaltet sind. FIG. 9 shows an embodiment in which individual wedge-shaped extensions 7 are pneumatically connected in series and are connected between the extensions line sections with a constant cross-section.

Das Brennstoffluftgemisch kann sowohl aus Gas (Erdgas oder Flüssiggas) oder auch aus Ölnebel (kleine Tröpfchen) in Verbindung mit Luft bestehen. Alternativ kann das Heizgerät auch mit festem oder staubförmigem Brennstoff betrieben werden.The fuel air mixture can consist of both gas (natural gas or LPG) or oil mist (small droplets) in conjunction with air. Alternatively, the heater can also be operated with solid or dusty fuel.

Die mit schallabsorbierendem oder schalldämpfendem Material 2, 3 ausgefüllte keilförmige Erweiterung 7 und Verlängerung 6 ist so ausgeführt, daß der Querschnitt der an ihnen vorbeiführenden oder sie durchsetzenden Luftleitung nicht beeinträchtigt wird.The filled with sound-absorbing or sound-absorbing material 2, 3 wedge-shaped extension 7 and extension 6 is designed so that the cross section of passing them or passing through them air line is not affected.

Im Übrigen kann die rohrförmige Verlängerung (22) wenigsten teilweise von einer Außenwandung des Heizgerätes oder von einem die Verbrennungskammer teilweise umschließenden Gehäuse gebildet sein. Nummer Bezeichnung 1 Rohrabschnitt vor dem Keil 2 akustisches Dämpfungsmaterial 3 akustisches Dämpfungsmaterial 4 Umlenkung 5 Rohr nach dem Dämpfungskeil 6 Verlängerung 7 keilförmige Erweiterung 8 Brennstoffzufuhreinrichtung 9 Gemischbildungsstrecke bzw. Brennstoffarmatur 10 Gebläse 11 Anschlußstrecke 12 Brenner 13 Brennraum 14 Wärmetauscher 15 Kondensatwanne oder Abgasumlenkung 16 Kondensatablauf 17 Abgasstrecke 18 Verbrennungssystem oder Heizgerät 19 Luftversorgungs- oder Oxidationsöffnung oder auch nur Einlaß 20 Abgasauslaß oder Atmosphärenauslaßöffnung 21 neuer Einlaß für Luft 22 Rohrartige Verlängerung 23 Trennsteg 24 Gehäuse 25 Stufe 26 Auslaß der rohrartigen Verlängerung 22 27 Luftdurchströmter Querschnitt der Verlängerung 22 28 Mittelachse der rohrartigen Verlängerung 22 29 nicht verwendet 30 nicht verwendet 31 Länge von Rohr 5 32 Länge vom Keil 7 33 Länge von Rohr 1 34 Strömungsrichtung 35 Flamme 36 Trompetenförmige oder anders gestaltete Erweiterung 37 Länge der trompetenförmigen Erweiterung 36 38 Gesamtlänge der rohrartigen Verlängerung 22 Incidentally, the tubular extension (22) may at least partially be formed by an outer wall of the heater or by a housing partially enclosing the combustion chamber. number description 1 Pipe section in front of the wedge 2 acoustic damping material 3 acoustic damping material 4 redirection 5 Pipe after the damping wedge 6 renewal 7 wedge-shaped extension 8th Fuel supply device 9 Mixture formation section or fuel fitting 10 fan 11 access link 12 burner 13 combustion chamber 14 heat exchangers 15 Condensate tray or exhaust diverter 16 condensate drain 17 exhaust system 18 Combustion system or heater 19 Air supply or oxidation or even inlet 20 Exhaust outlet or Atmosphärenauslaßöffnung 21 new intake for air 22 Pipe-like extension 23 divider 24 casing 25 step 26 Outlet of the tubular extension 22nd 27 Air flow cross section of the extension 22 28 Central axis of the tubular extension 22nd 29 not used 30 not used 31 Length of pipe 5 32 Length of the wedge 7 33 Length of pipe 1 34 flow direction 35 flame 36 Trumpet-shaped or otherwise designed extension 37 Length of the trumpet-shaped extension 36 38 Total length of the tubular extension 22nd

Claims (17)

  1. A combustion chamber (18) having
    a housing (24),
    a burner (12) therein,
    an air inlet opening (19) on a first side of said housing (24)
    and an exhaust gas outlet (20) on the other second side of said housing (24), wherein, on said first side of said housing (24), a section of mixture formation (9) is, with respect to the direction of the air flow, provided downstream of said air inlet (19),
    in which section of mixture formation (9) a combustible being supplied via a combustible connection (8) is mixed with the air sucked in via said air inlet (19),
    to supply the combustible mixture on said first side of said housing (24) to said burner (12),
    characterized by a tubular extension (22) on the entry side of said air inlet (19), the free cross section (27) of which, through which said air flows, decreases in a direction opposed to said direction (34) of said air flow,
    and in that the area of the smallest cross section (27) of said tubular extension (22) amounts to not more than 75 % of the area of the cross section (27) of said tubular extension (22) at the outlet (26) of said tubular extension (22) at its end oriented towards said air inlet (19) of said combustion chamber (18).
  2. The combustion chamber (18) according to claim 1, characterized in that said free cross section (27) through which said air flows decreases continuously.
  3. The combustion chamber (18) according to claim 1, characterized in that said free cross section (27) through which said air flows decreases stepwise.
  4. The combustion chamber (18) according to claim 1, characterized in that said free cross section (27) through which said air flows decreases exponentially.
  5. The combustion chamber (18) according to claim 1, characterized in that said free cross section (27) through which said air flows decreases having a bally-like shape.
  6. The combustion chamber (18) according to one of claims 1 to 5, characterized in that said tubular extension (22) comprises a section (7) having a wedge-like shape and being filled at least partially with a sound absorbing or sound deadening material (2), the tapering end of which section (7) points in said direction (34) of flow.
  7. The combustion chamber (18) according to claim 6, characterized in that the cross sectional area of said section (7) having said wedge-like shape and being filled with a sound absorbing or a sound deadening material (2) decreases continuously or in small steps.
  8. The combustion chamber (18) according to one of claims 1 to 5, characterized in that said tubular extension (22) partially has a constant widening (6) of its cross section, which is filled at least partially with a sound absorbing or sound deadening material (3).
  9. The combustion chamber (18) according to claim 6 or 7, characterized in that said tubular extension (22) partially has a constant widening (6) of its cross section in addition, which is filled at least partially with a sound absorbing or sound deadening material (3).
  10. The combustion chamber (18) according to one of claims 1 to 7, characterized in that said tubular extension (22) comprises a plurality of sections (7) having a wedge-like shape and being filled at least partially with a sound absorbing or sound deadening material (2), the tapering ends of which point in said direction (34) of flow.
  11. The combustion chamber (18) according to one of claims 1 to 10, characterized in that a trumpet-like intake opening (36) is provided at the inlet (21) of said tubular extension (22).
  12. The combustion chamber (18) according to one of claims 1 to 10, characterized in that a widening (36) of the cross section, said widening (36) pointing upstream, is provided at the inlet (21) of said tubular extension (22).
  13. The combustion chamber (18) according to claim 12, characterized in that the length (37) of said widening (36) is equal to or smaller than a quarter of the total length (38) of said tubular extension (22).
  14. The combustion chamber (18) according to one of claims 1 to 12, characterized in that the length (32) of a widening (7) having a wedge-like shape is equal to or larger than 5 times the square root of the smallest area of the cross section (27) of said tubular extension (22).
  15. The combustion chamber (18) according to one of claims 1 to 14, characterized in that said tubular extension (22) is plugged to, plugged onto or plugged into said air inlet (19) to said combustion chamber (18).
  16. The combustion chamber (18) according to one of claims 1 to 14, characterized in that said tubular extension (22) is flange-mounted to said air inlet (19) to said combustion chamber (18).
  17. The combustion chamber (18) according to one of claims 1 to 16, characterized in that said tubular extension (22) is formed at least partially by an outer wall of the heating device or by a housing enclosing said combustion chamber partially.
EP07101283A 2006-10-06 2007-01-26 Combustion chamber equipped with a burner Not-in-force EP1912021B1 (en)

Applications Claiming Priority (1)

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DE102006047386 2006-10-06

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002029319A1 (en) * 2000-10-03 2002-04-11 Sit La Precisa S.P.A. An improved air-gas mixer device
DE102004006647A1 (en) * 2003-02-14 2004-08-26 IfTA Ingenieurbüro für Thermoakustik GmbH Noise reduction for combustion systems comprises vari-length bypass into offgas sector where vibration node or anti-node coincide to reduce noise in smoother system.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19733767A1 (en) 1997-08-05 1999-02-11 Dungs Karl Gmbh & Co Fuel gas introduction device for a gas premix burner
AT408028B (en) * 1998-07-30 2001-08-27 Vaillant Gmbh Heating device
DE10202702B4 (en) 2001-01-24 2013-01-10 IfTA Ingenieurbüro für Thermoakustik GmbH Heater with a housing

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002029319A1 (en) * 2000-10-03 2002-04-11 Sit La Precisa S.P.A. An improved air-gas mixer device
DE102004006647A1 (en) * 2003-02-14 2004-08-26 IfTA Ingenieurbüro für Thermoakustik GmbH Noise reduction for combustion systems comprises vari-length bypass into offgas sector where vibration node or anti-node coincide to reduce noise in smoother system.

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