EP0796412B1 - Bruleur pour dispositifs de chauffage, notamment pour chauffe-eau - Google Patents

Bruleur pour dispositifs de chauffage, notamment pour chauffe-eau Download PDF

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Publication number
EP0796412B1
EP0796412B1 EP95936980A EP95936980A EP0796412B1 EP 0796412 B1 EP0796412 B1 EP 0796412B1 EP 95936980 A EP95936980 A EP 95936980A EP 95936980 A EP95936980 A EP 95936980A EP 0796412 B1 EP0796412 B1 EP 0796412B1
Authority
EP
European Patent Office
Prior art keywords
burner
plate
burner plate
gas burner
channels
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
EP95936980A
Other languages
German (de)
English (en)
Other versions
EP0796412A1 (fr
Inventor
Walter Daniel
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0796412A1 publication Critical patent/EP0796412A1/fr
Application granted granted Critical
Publication of EP0796412B1 publication Critical patent/EP0796412B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • 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
    • F23D14/12—Radiant burners
    • F23D14/18—Radiant burners using catalysis for flameless combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/108—Flame diffusing means with stacked sheets or strips forming the outlets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00—Fins
    • F28F2215/04—Assemblies of fins having different features, e.g. with different fin densities

Definitions

  • the invention is based on gas burners according to the genus Main claim.
  • the channels in the burner plate are formed between individual plate elements, the edges of which on the combustion chamber side all lie in a common exit plane.
  • the flame roots only touch the burner plate with their apex regions, so that a heat flow that cools the flames via the burner plate into the heat-dissipating medium is only possible to a limited extent. This also restricts the effort for the burner to have as large a surface load as possible if the flame temperature is not to rise to an area which is harmful with respect to the formation of NO x .
  • the arrangement according to the invention with the characterizing features of the main claim has the advantage that the flames are cooled in their root area over a defined area extending beyond the apex area so that even higher surface loads of the burner or the burner plate are possible without result in inadmissibly high NO x values.
  • the distinctive structuring of the burner plate can be achieved by not between two set back sheet metal ribs a set back or shortened sheet metal rib is provided. At An execution has proven to be particularly advantageous pointed out, in which between two not set back sheet metal ribs two shorter sheet metal ribs are arranged side by side.
  • the channels in the burner plate In the formation of the channels in the burner plate is make sure that they have at least one Longitudinal section a width or a diameter have the or the smaller than the so-called Extinguishing distance is so that the flames do not fight back can.
  • the Opening diameter or their mesh size is smaller than the rib spacing.
  • Burner plate can also be made from an inflow hole provided, connected to the heat-dissipating pipe system Base plate and a variety of on the base plate attached pins are made between the channels form for the passage of the fuel-air mixture.
  • the burner plate can consist of a honeycomb structure and an associated base plate exist with the heat-dissipating pipe system connected and in the channels the inflow holes opening into the honeycomb structure is.
  • the honeycomb structure is suggested, this by shortened To train inserts in the individual honeycombs.
  • the formation of harmful NO x emissions can be further counteracted if the walls of the channels for the fuel / air mixture flowing through are catalytically coated at least in the region of their end sections on the combustion chamber side.
  • the burner plate must be designed by appropriate dimensioning or material selection so that the surface temperature is approximately 600 ° C.
  • Such a catalytic burner is started in a conventional manner with flames burning freely at the fin or honeycomb ends. After the burner plate has been heated to the operating temperature of the catalyst coating, the flames withdraw into the catalytically active region.
  • the gas burner as a heat source for a water heater can be advantageous with the burner plate Pipe system of the water to be heated connected in a heat-conducting manner be flowed through and the pipe system with the burner plate form a heat exchanger unit of the water heater.
  • one of the combustion gases of the Gas burner's heat exchanger is smaller than at a version with uncooled burner.
  • FIG. 1 shows a water heater with a Gas burner according to the first embodiment
  • Figure 2 enlarges the burner plate of the gas burner according to FIG. 1 and Figures 3 and 4 each a modification of the burner plate according to Figure 2.
  • Figures 5 and 6 are the burner plates according to the second and third embodiments shown.
  • Figure 7 shows a plan view of the Burner plate according to FIG. 6.
  • the water heater according to FIG. 1 has a housing 10 a gas burner 12, under which a fuel-air mixture Blower pressure is supplied in the direction of arrow A. Downstream of the gas burner 12 sits in the housing 10 Exhaust gas heat exchanger 14, which is from a pipe system 16th is penetrated, which leads the water to be heated. The Pipe system 16 is via a line 18 to a second Connected pipe system 20, which is integrated into the gas burner 12 is. An ignition device 22 is located downstream of the gas burner 12 attached to the housing 10 for starting the heater.
  • the gas burner 12 has a burner plate 24 that is made of sheet ribs 26, 28 of different lengths (FIG. 2) is constructed.
  • the sheet metal fins 26, 28 are in good condition thermally conductive contact with the pipe system 20 and are through this connected to a rigid unit.
  • Between Sheet metal ribs 26, 28 are column 30 for the passage of the Fuel-air mixture formed.
  • the width a of the column 30 is smaller than the so-called extinguishing distance, see above that flames are not in the burner plate 24 or in kick back any mixing zone in front of it can.
  • the burner plate 24 is designed so that the shorter ones Sheet metal ribs 28 each between two longer sheet metal ribs 26 stand.
  • the arrangement is such that the Margins 32 of the shorter sheet metal fins 28 on the combustion chamber side opposite the edges 34 of the longer sheet metal ribs 26 are reset. This results in the combustion chamber side wall of the burner plate 24 a strong tiered surface structuring with wide Spaces 36 laterally through wall areas 38 of the longer sheet metal ribs 26 are limited.
  • the mixture After igniting the burner, the mixture reacts between or at the downstream edges 32, 34 of the Sheet metal fins 26, 28 with flame formation, whereby Heat of reaction from the flame roots over the sheet metal fins 26, 28 reaches the water to be heated in the pipe system 20.
  • the flame roots are particularly well cooled, because they also have side contact with the wall areas 38 of the Have sheet metal fins 26.
  • the two reaction to the Burner plate 24 resulting combustion gases flow through the exhaust gas heat exchanger 14, where it transfers heat to the one to be heated Dispense water in the pipe system 16.
  • the modified version 3 is a burner plate 40, in each case two shortened sheet metal ribs 28 between the longer ones Sheet metal ribs 26 are arranged. This still results wider gaps 42 which the wall on the combustion chamber side structure the burner plate 40 particularly strongly.
  • Burner plate 44 made of different long metal ribs 46, 48 built up by the cooling pipe system 20 rigid interconnected and their combustion chamber side End sections are coated catalytically.
  • the input side is the burner plate 44 with a Provide lattice structure 50 whose mesh size is smaller than is the width of the gap between the sheet metal fins 46, 48.
  • the thermal conductivity of the metal fins 46, 48 is through Dimensioning and / or choice of materials based on the burner output matched that their surface temperature on to Example sets 600 ° C.
  • On the metal ribs 46, 48 takes place a catalytic combustion takes place in which compared to the formation of an uncoated version Pollutants is reduced even further.
  • the burner is started in a conventional manner one at the ends of the sheet metal fins 46, 48 on the combustion chamber side free burning flame. After heating the sheet metal fins 46, 48 to the operating temperature of the catalyst coating the flame pulls into the catalytically active area the burner plate 44 back.
  • FIG 5 is a burner plate 52 with different lengths Pins 54, 56 populated, the channels 58 between them for the Passage of the fuel-air mixture and on the combustion chamber side wider spaces 60 for extensive touching the Form flame roots.
  • Pins 54, 56 are on one Fixed base plate 62, the narrow inflow holes 64th is provided for the fuel-air mixture and at the same time.
  • a thermally conductive connection to a water leading Pipe system 66 that is, for example extends meandering over the surface of the base plate 62.
  • the exemplary embodiment according to FIGS. 6 and 7 differs from the above in that a Burner plate 68 from that connected to the pipe system 66 Base plate 62 and a honeycomb structure 70 attached to it consists. This is made of hexagonal, without any gaps Individual honeycomb 72 formed in the cavities Inflow bores 64 of the base plate 62 open out.
  • Burner plate 68 can, as in Figures 6 and 7 on the right the cavities of the individual honeycombs 72 or one is shown Part of the individual honeycombs 72 through on the base plate 62 attached, preferably also honeycomb-shaped inserts 74 be narrowed, which are shorter than the individual honeycombs 72 are and a gradation of the wall of the combustion chamber Effect burner plate.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Geometry (AREA)
  • Gas Burners (AREA)

Claims (9)

  1. Brûleur à gaz pour appareils de chauffage, en particulier pour des chauffe-eau, comprenant une plaque de brûleur constituée sous une forme nervurée, qui a un grand nombre de canaux servant à faire passer un mélange d'air et de combustible amené sous pression par une soufflante, mélange qui se réchauffe sur la plaque du brûleur à la température d'inflammation et réagit dans la zone des embouchures des canaux situés du côté de la chambre de combustion en formant des flammes, et comprenant en outre des moyens servant à refroidir la plaque du brûleur et à limiter la température des flammes à des valeurs auxquelles les émissions de NOx du brûleur ne dépassent pas des limites prédéfinies,
    caractérisé en ce que
    la paroi de la plaque du brûleur (24, 40, 44, 52, 68), qui est située du côté de la chambre de combustion est constituée avec une structure en gradins, de telle sorte que les bords (32) situés du côté de la chambre de combustion, de nervures déterminées (28, 48) de la plaque du brûleur (24, 40, 44, 52, 68), sont décalés en arrière par rapport aux bords (34) des autres nervures (26, 46) de la plaque de brûleur (24, 40, 44, 52, 68), et
    il en résulte, entre les racines des flammes reposant sur la plaque du brûleur et les bords (32, 34) des embouchures des canaux (30, 58), des surfaces de contact définies (38) qui s'étendent au-delà des zones des sommets des racines des flammes en s'en écartant mais aussi contre celles-ci, ou dans leurs zones latérales.
  2. Brûleur à gaz selon la revendication 1,
    caractérisé en ce que
    deux nervures (28, 48) plus courtes sont disposées côte à côte entre chaque fois deux nervures (26, 46) qui ne sont pas décalées en arrière.
  3. Brûleur à gaz selon la revendication 1 ou 2,
    caractérisé en ce que
    la plaque du brûleur (24, 40, 44) est construite à partir de nervures de tôle (26, 28, 46, 48) qui sont reliées les unes aux autres par un système de tubes de refroidissement (20) parcourus pare un fluide évacuant la chaleur, et qui délimitent entre elles des canaux ou des fentes (30) servant au passage du mélange d'air et de combustible.
  4. Brûleur à gaz selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    il est prévu du côté de l'arrivée de l'écoulement de la plaque du brûleur (42, 52, 68) une structure en forme de grille ou une tôle perforée (50, 62), dont la largeur de maille ou les diamètres d'ouverture des trous sont plus petits que l'écartement des nervures.
  5. Brûleur à gaz selon la revendication 1,
    caractérisé en ce que
    la plaque du brûleur (52) consiste en une plaque de base (62) pourvue d'alésages (64) pour l'arrivée de l'écoulement, reliée à un système de tuyaux (66) évacuant la chaleur, et en un grand nombre de tiges (54, 56) qui forment entre elles les canaux (58) servant au passage du mélange d'air et de combustible.
  6. Brûleur à gaz selon la revendication 1,
    caractérisé en ce que
    la plaque du brûleur (68) se compose d'une structure en nid d'abeille (70) et d'une plaque de base (62) reliée à celle-ci, plaque de base qui est reliée à un système de tuyaux (66) évacuant la chaleur et est pourvue d'alésages (64) pour l'arrivée de l'écoulement, débouchant dans les canaux de la structure (70) en nid d'abeilles.
  7. Brûleur à gaz selon la revendication 6,
    caractérisé en ce que
    la paroi de la structure (70) en nid d'abeilles, qui est située du côté de la chambre de combustion est constituée selon une structure en gradins par des inserts raccourcis (74) interposés dans ses différentes alvéoles (72).
  8. Brûleur à gaz selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les parois des canaux pour le mélange d'air et de combustible qui passe à travers sont pourvues d'un revêtement catalytique dans la zone de leurs sections terminales situées du côté de la chambre de combustion.
  9. Brûleur à gaz selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le système de tuyaux (20, 66) relié à la plaque du brûleur (24, 40, 44, 52, 68), en conduisant la chaleur, est parcouru par de l'eau à chauffer en tant que fluide servant à évacuer la chaleur, et le système de tuyaux forme avec la plaque du brûleur une unité d'échange de chaleur pour un chauffe-eau.
EP95936980A 1994-12-20 1995-11-24 Bruleur pour dispositifs de chauffage, notamment pour chauffe-eau Expired - Lifetime EP0796412B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4445460A DE4445460A1 (de) 1994-12-20 1994-12-20 Gasbrenner für Heizgeräte, insbesondere Wassererhitzer
DE4445460 1994-12-20
PCT/DE1995/001663 WO1996019698A1 (fr) 1994-12-20 1995-11-24 Bruleur pour dispositifs de chauffage, notamment pour chauffe-eau

Publications (2)

Publication Number Publication Date
EP0796412A1 EP0796412A1 (fr) 1997-09-24
EP0796412B1 true EP0796412B1 (fr) 2001-06-20

Family

ID=6536379

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95936980A Expired - Lifetime EP0796412B1 (fr) 1994-12-20 1995-11-24 Bruleur pour dispositifs de chauffage, notamment pour chauffe-eau

Country Status (8)

Country Link
EP (1) EP0796412B1 (fr)
JP (1) JPH10510912A (fr)
KR (1) KR980700540A (fr)
CN (1) CN1171150A (fr)
CZ (1) CZ189897A3 (fr)
DE (2) DE4445460A1 (fr)
RU (1) RU2150637C1 (fr)
WO (1) WO1996019698A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29611338U1 (de) * 1996-06-18 1997-10-16 Robert Bosch Gmbh, 70469 Stuttgart Gasbrenner für Heizgeräte
DE19641040A1 (de) * 1996-10-04 1998-04-23 Bosch Gmbh Robert Atmosphärischer Gasbrenner
DE19718885C2 (de) * 1997-05-03 2003-10-09 Bosch Gmbh Robert Gasbrenner
DE19722863A1 (de) * 1997-05-31 1998-12-03 Bosch Gmbh Robert Gasbrenner für Heizgeräte, insbesondere Wassererhitzer
DE10213132B4 (de) * 2002-03-23 2005-06-02 Robert Bosch Gmbh Gasbrenner
US9976740B2 (en) * 2012-06-12 2018-05-22 Board of Regents of the Nevada Systems of Higher Educations, on Behalf of the University of Nevada, Reno Burner
KR101359551B1 (ko) * 2012-08-16 2014-02-12 주식회사 경동나비엔 냉각장치를 구비한 예혼합 버너
CA2983204C (fr) * 2015-06-30 2020-03-10 Uop Llc Optimiseur de temperature de film pour appareils de chauffage industriel a combustible

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4137905A (en) * 1972-04-17 1979-02-06 T. I. Domestic Appliances Limited Gaseous fuel burners
IT1205556B (it) * 1986-08-29 1989-03-23 Polidoro Aldo Testa di bruciatore di gas ottenuta mediante una lamiera punzonata
GB2223838B (en) * 1988-09-22 1992-07-22 Padley Dr Peter Joseph Boiler system
NL8901559A (nl) * 1989-06-21 1991-01-16 Nefit Nv Verwarmingsinrichting.
AT396017B (de) * 1990-08-01 1993-05-25 Vaillant Gmbh Brenner
NL9200282A (nl) * 1991-12-16 1993-07-16 Dejatech Bv Brander, al dan niet geintegreerd in een warmtewisselaar.
FR2714151B1 (fr) * 1993-12-22 1996-02-02 Gaz De France Dispositif d'accrochage de flammes et d'échange de chaleur, brûleur et chauffe-fluide ainsi équipés .

Also Published As

Publication number Publication date
WO1996019698A1 (fr) 1996-06-27
DE59509357D1 (de) 2001-07-26
KR980700540A (ko) 1998-03-30
DE4445460A1 (de) 1996-06-27
CZ189897A3 (en) 1997-10-15
EP0796412A1 (fr) 1997-09-24
RU2150637C1 (ru) 2000-06-10
CN1171150A (zh) 1998-01-21
JPH10510912A (ja) 1998-10-20

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