EP0769656B1 - Verbesserungen an Brennern für Wassererhitzer, Baderhitzer oder Gasheizkessel - Google Patents

Verbesserungen an Brennern für Wassererhitzer, Baderhitzer oder Gasheizkessel Download PDF

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Publication number
EP0769656B1
EP0769656B1 EP96402197A EP96402197A EP0769656B1 EP 0769656 B1 EP0769656 B1 EP 0769656B1 EP 96402197 A EP96402197 A EP 96402197A EP 96402197 A EP96402197 A EP 96402197A EP 0769656 B1 EP0769656 B1 EP 0769656B1
Authority
EP
European Patent Office
Prior art keywords
flame
burner
venturi tube
burner according
atmospheric burner
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96402197A
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English (en)
French (fr)
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EP0769656A1 (de
Inventor
Eric Weiland
Gilles Leclerc
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ELM Leblanc SAS
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ELM Leblanc SAS
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Anticipated expiration legal-status Critical
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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
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/78—Cooling burner parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/045—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with a plurality of burner bars assembled together, e.g. in a grid-like arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/10—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means

Definitions

  • the present invention relates to a device intended to equip boilers with gas supply. It relates more particularly to the burners fitted to the water heaters, bath heaters and gas boilers and which realize within a room, the combustion natural or assisted by a premix consisting of oxidizer, in particular air, and a fuel, especially of the gas type.
  • the burner, object of the invention seeks to achieve at the times a double objective, on the one hand a decrease in pollutant emissions from the flames, and secondly a flame stabilization, while respecting optimal physical and mechanical conditions of the combustion.
  • the shape and the reduced size of the spout require the same overall power delivered to increase the number nozzles and therefore the number of air injection points primary. They also make it possible to develop burners variable power from an assembly by juxtaposition of different batteries of spouts burners placed in parallel or staggered.
  • the burner burners thus designed also have orifices linked together by a network of conduits which make possible the circulation of a heat transfer fluid for cooling the whole.
  • Known burner devices include generally a battery of ramps obtained by stamping of a metal sheet and at the top of which the combustion of the fuel is carried out, in particular gas, within an oxidizer, especially air.
  • a atmospheric burner made up of modules arranged in a succession of parallel rows, each module comprising a venturi tube, feeding in premix air / gas a chamber which is covered by an outlet of flame, said chamber also having a zone of pinch between the flame outlet and the venturi tube, this burner being furthermore traversed by orifices.
  • the burner arrangements are not optimal for combustion control, mainly in terms of flame stability and of its homogeneity. In addition, they most often require to work with a low primary air rate well lower than the rate corresponding to stoichiometry.
  • the present invention therefore aims to remedy these disadvantages, by proposing a burner device such that the secondary air arrives in a way that minimizes the time required for complete combustion of the mixture gaseous present at the burner outlet, this mixture being composed in adequate proportion of a fuel to ignite and primary combustion air to it associated, allowing to stabilize and hang the flames at the burner outlet.
  • the assembly of a plurality of burners according to the invention allows the user flexibility functioning, because it can, for the same useful volume, choose and assemble the number of burners, depending of the requested heating power.
  • the atmospheric burner, object of the invention comprising a plurality of modules arranged in a succession of parallel rows made up of aligned and / or staggered tubes, each module comprising at least one venturi tube, supplying premix air-gas at least one room that is covered by a flame outlet with a rounded profile, said chamber additionally having a nip between the flame outlet and venturi tube, venturi tubes being formed by the assembly of half-shells having a plurality of orifices through which conduits are arranged, said orifices being formed so that they are facing each other and cooperating between them when assembling the two half-shells.
  • the characteristics of the burner according to the invention allow to obtain a reduction significant NOx levels.
  • the front of this mixing chamber is intended to receive in particular, by nesting, by slide, preferably relatively waterproof, a cover 11 made of a material compatible with the proximity to the flame, for example stainless steel, and provided with orifices 12.
  • This cover 11 constitutes the flame outlet and has an upper surface of which the profile is rounded.
  • an output will preferably be used flame of cylindrical shape because it allows to obtain a stable flame, "off the hook", thus generating little pressure drop on the air-gas mixture flow and a low temperature reducing NOx levels, by the low heat exchange between an "off the hook" flame and the upper surface of the beak.
  • the orifices 12 arranged uniformly on the flame outlet 11 cylindrical consist of 13 transverse slots to the longitudinal axis of the flame outlet.
  • the cylindrical flame outlet has at its top a strip of material 14 in order to split the slots in half according to a quadrant.
  • the geometrical configuration, the distribution, the dimensions of the slots 13 are adjusted according to flame stability and the desired surface power.
  • the flame outlet has at its zones of contact with the side wall venturi tube 15 allowing interlocking according to the interior or according the outside of the wall of the venturi tube, these walls 15 according to a second embodiment can be folded in order to conform slides.
  • the ends 16 of the side walls 15 of the flame outlet 11, in a mounting mode by interlocking, have a cutout 16, so as to making flexible legs 17; these last both improve the mechanical strength of the assembly, and the exchange of calories with the medium surrounding.
  • the quality of the thermal contact between the flame outlet and the body of the spout will be compatible with the flow thermal to evacuate.
  • the flame outlet may be in steel stainless tin-plated so that during operation, the tin film ensures soldering continuous and homogeneous between the flame outlet and the spout burner.
  • the use of tin is only given as an example, and this quality of thermal bond that appears independently when the burner works, that is to say by simplifying the assembly process in manufacturing, can be obtained with any other brazing compatible with copper and stainless steel and whose melting point is lower than the temperature reached by the outlet of flame when the burner is operating. She may be also obtained with alloys with melting point higher, but this complicates the manufacturing process burner burners.
  • venturi tube 1 provided with an outlet cylindrical flame 11, as described above, ensures a primary air ventilation rate, preferably slightly higher than that corresponding to a stoichiometric mixture.
  • the burner, object of the invention is obtained by the juxtaposition of a plurality of modules composed of minus a venturi tube, assembly being carried out by through the joint planes 18, formed during the joining of the two half-shells 2, 3.
  • each simple module provided of a venturi tube keeps its own mixing chamber 9 and its own flame outlet 11, and according to a second variant (not shown), in an application consisting of a double module, the two venturi tubes 1 pool each of their mixing chamber 9 in upper part and in the area close to the axis of central symmetry, the flame outputs 11 are also joined together to form a single cover and also have a rounded profile.
  • the half-shells have a plurality of orifices 19 came during the stamping operation, these orifices cooperate with each other during the juxtaposition of two 2-3 half-shells in module.
  • the invention authorizes the development of burners obtained by the association of a plurality of modules, these being arranged in a succession of rows parallel tubes aligned and / or staggered.
  • conduits 20 for improve the mechanical strength of the assembly, we have conduits 20 in the various orifices 19 in look. Depending on the use regimes, we restores circulation of heat transfer fluid within these conduits.
  • the invention described above offers multiple advantages, such as in particular obtaining a flame combustion primary near stoichiometry whose contact area with the exit surface is weak and therefore not very conducive to heating, and secondary flame of over-stoichiometric combustion in which is carried out the oxidation of products from primary combustion.
  • the present invention is not not limited to the embodiments described and shown above, but that it includes all variants.
  • the second tubular part 7 of the burner according to the embodiment described above can be integrated into the mixing chamber 9, constituting thus a conical zone with elliptical section and surface variable.
  • said conical section section elliptical and variable surface has a length representing 70% of the total length of the burner, measured along the flow line of the air-gas mixture.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Details Of Fluid Heaters (AREA)
  • Control For Baths (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Claims (9)

  1. Atmosphärischer Brenner mit einer Mehrzahl von Modulen, die in einer Folge von parallelen Reihen angeordnet sind, die aus in einer Linie und/oder im Zickzack angeordneten Rohren (1) bestehen, wobei jedes Modul mindestens ein Venturi-Rohr (1) aufweist, das mindestens eine Kammer (9) mit Luft/Gasvorgemisch versorgt, wobei die Kammer von einem Flammenaustritt (11) mit abgerundetem Profil abgedeckt ist und außerdem zwischen dem Flammenaustritt und dem Venturi-Rohr (1) eine Einschnürungszone (10) aufweist, die Venturi-Rohre (1) durch Zusammenbau von Halbschalen mit einer Mehrzahl von Öffnungen (19) gebildet sind und durch die Öffnungen (19) hindurch Leitungen (20) angeordnet sind, und die Öffnungen so ausgebildet sind, daß sie einander gegenüberliegen und beim Zusammensetzen der zwei Halbschalen miteinander zusammenwirken.
  2. Atmosphärischer Brenner nach Anspruch 1, dadurch gekennzeichnet, daß die Einschnürungszone (10) ein einfaches oder kompliziertes ovales Profil zeigt.
  3. Atmosphärischer Brenner nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Flammenaustritt (11) eine Mehrzahl von gleichmäßig angeordneten Öffnungen (12) aufweist, die aus quer zur Längsachse des Flammenaustritts verlaufenden Schlitzen (13) bestehen.
  4. Atmosphärischer Brenner nach Anspruch 3, dadurch gekennzeichnet, daß der Flammenaustritt (11) an einer Spitze ein Materialband (14) aufweist, um die Schlitze in zwei gemäß einem Quadranten verlaufende zu trennen, wobei die Schlitze in Abhängigkeit von den Bedingungen der Stabilität der Flammen eingerichtet sind.
  5. Atmosphärischer Brenner nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Flammenaustritt (11) auf der Höhe seiner Berührungszonen mit dem Venturi-Rohr (1) Seitenwände (15) aufweist, die ein Aufsetzen zum Inneren oder Äußeren der Wand des Venturi-Rohrs ermöglichen.
  6. Atmosphärischer Brenner nach Anspruch 5, dadurch gekennzeichnet, daß die Seitenwände (15) gefaltet sind, um Gleitschienen zu bilden.
  7. Atmosphärischer Brenner nach einem der Ansprüche 5 oder 6, dadurch gekennzeichnet, daß die Enden der Seitenwände (15) des Flammenaustritts (11) einen Ausschnitt (16) aufweisen, um biegsame Finger (17) zu bilden.
  8. Atmosphärischer Brenner nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Körper des Brenners aus einem Material hergestellt ist, welches die Abführung des Wärmeflusses und das Erreichen von geringen NOx-Anteilen begünstigt, wie besonders Kupfer und/oder Aluminium.
  9. Atmosphärischer Brenner nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Flammenaustritt aus beschichtetem rostfreiem Stahl ist, wobei die Schmelztemperatur der Legierung oder des Metalls, die für die Herstellung der Beschichtung des rostfreien Stahls verwendet wurden, so gewählt ist, daß sich im Verlauf des Betriebs des Brenners automatisch eine kontinuierliche und homogene Verbindung durch Lötung zwischen dem Flammenaustritt (11) und der Kammer (9) des Brenners bilden kann.
EP96402197A 1995-10-19 1996-10-15 Verbesserungen an Brennern für Wassererhitzer, Baderhitzer oder Gasheizkessel Expired - Lifetime EP0769656B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9512302 1995-10-19
FR9512302A FR2740202B1 (fr) 1995-10-19 1995-10-19 Perfectionnements apportes a un bruleur de chauffe-eau, chauffe-bain, chaudiere a gaz

Publications (2)

Publication Number Publication Date
EP0769656A1 EP0769656A1 (de) 1997-04-23
EP0769656B1 true EP0769656B1 (de) 1999-09-22

Family

ID=9483703

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96402197A Expired - Lifetime EP0769656B1 (de) 1995-10-19 1996-10-15 Verbesserungen an Brennern für Wassererhitzer, Baderhitzer oder Gasheizkessel

Country Status (7)

Country Link
EP (1) EP0769656B1 (de)
AT (1) ATE184977T1 (de)
DE (1) DE69604357T2 (de)
DK (1) DK0769656T3 (de)
ES (1) ES2136378T3 (de)
FR (1) FR2740202B1 (de)
GR (1) GR3032185T3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20109170U1 (de) * 2001-06-05 2002-10-10 Viessmann Werke Kg Atmosphärischer Gasbrenner

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19747483A1 (de) * 1997-10-28 1999-04-29 Bosch Gmbh Robert Gasbrenner
DE10010762C2 (de) 2000-03-04 2002-03-28 Bosch Gmbh Robert Atmosphärischer Gasbrenner
DE10053876C2 (de) * 2000-10-31 2002-10-17 Bosch Gmbh Robert Brennerplatte für einen Gasbrenner
DE10053875C1 (de) * 2000-10-31 2002-06-06 Bosch Gmbh Robert Brennerplatte für einen Gasbrenner
DE10053877B4 (de) * 2000-10-31 2004-10-07 Robert Bosch Gmbh Brennerplatte für einen Gasbrenner
FR2866696B1 (fr) * 2004-02-20 2006-12-08 Chaffoteaux Et Maury Perfectionnements aux bruleurs a gaz de type atmospherique
CN104896511B (zh) * 2015-05-29 2017-03-22 北京航空航天大学 一种用于低排放燃烧室的燃油预混装置
TWI621813B (zh) * 2016-09-26 2018-04-21 Grand Mate Co Ltd burner
TWI614455B (zh) * 2016-11-21 2018-02-11 提升導流效果之熱風槍
CN107781808B (zh) * 2017-11-24 2023-03-14 珠海格力电器股份有限公司 燃烧装置及壁挂炉
WO2019140861A1 (zh) * 2018-01-16 2019-07-25 芜湖美的厨卫电器制造有限公司 分火器及应用其的燃烧器和热水器
WO2019219037A1 (zh) * 2018-05-15 2019-11-21 芜湖美的厨卫电器制造有限公司 分火器及具有其的燃烧器和热水器
CN108534139A (zh) * 2018-05-15 2018-09-14 芜湖美的厨卫电器制造有限公司 燃烧器及热水器
CN110578920A (zh) * 2018-06-08 2019-12-17 美的集团股份有限公司 燃烧器和燃气热水器
ES2863909T3 (es) * 2018-07-20 2021-10-13 Guangdong Vanward New Electric Calentador de agua a gas y quemador del mismo

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2102802A6 (de) * 1968-05-02 1972-04-07 Zaegel Held Sa
FR2652522A1 (fr) * 1989-08-10 1991-04-05 Vaillant Sarl Procede pour la fabrication d'un bruleur et disposotif pour l'execution de ce procede ainsi que bruleur realise suivant ce procede.
IT226008Y1 (it) * 1991-12-06 1997-03-11 Aldo Polidoro Bruciatore di gas del tipo cosiddetto a rampette
IT1256149B (it) * 1992-09-24 1995-11-29 Ferroli Spa Bruciatore a gas di tipo atmosferico con combustione a bassa produzione di ossidi di azoto e di ossidi di carbonio
FR2700604B1 (fr) * 1993-01-15 1995-04-07 Joseph Le Mer Procédé de fabrication d'un élément de brûleur à gaz, élément ainsi obtenu, et brûleur en faisant utilisation.
IT1266802B1 (it) * 1993-11-10 1997-01-21 Worgas Bruciatori Srl Elemento miscelatore e diffusore per bruciatore atmosferico
GB9400007D0 (en) * 1994-01-04 1994-03-02 Bray Technologies Plc Improvements relating to gas burners
EP0713053A1 (de) * 1994-11-16 1996-05-22 Aldo Polidoro Hyperstöchiometrischer atmosphärischer Gasbrenner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20109170U1 (de) * 2001-06-05 2002-10-10 Viessmann Werke Kg Atmosphärischer Gasbrenner

Also Published As

Publication number Publication date
GR3032185T3 (en) 2000-04-27
DE69604357T2 (de) 2000-01-20
DK0769656T3 (da) 1999-12-20
DE69604357D1 (de) 1999-10-28
FR2740202B1 (fr) 1997-12-12
ATE184977T1 (de) 1999-10-15
EP0769656A1 (de) 1997-04-23
FR2740202A1 (fr) 1997-04-25
ES2136378T3 (es) 1999-11-16

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