EP0865590A1 - Bruleur atmospherique - Google Patents

Bruleur atmospherique

Info

Publication number
EP0865590A1
EP0865590A1 EP97941865A EP97941865A EP0865590A1 EP 0865590 A1 EP0865590 A1 EP 0865590A1 EP 97941865 A EP97941865 A EP 97941865A EP 97941865 A EP97941865 A EP 97941865A EP 0865590 A1 EP0865590 A1 EP 0865590A1
Authority
EP
European Patent Office
Prior art keywords
gas burner
burner according
gas
injector arrangement
flow channel
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.)
Granted
Application number
EP97941865A
Other languages
German (de)
English (en)
Other versions
EP0865590B1 (fr
Inventor
Juergen Stoschek
Marcus Bienzle
Michael Jantzer
Beate Maucher
Thomas-Eckart Frieling
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 EP0865590A1 publication Critical patent/EP0865590A1/fr
Application granted granted Critical
Publication of EP0865590B1 publication Critical patent/EP0865590B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/10—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
    • F23D14/583—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration of elongated shape, e.g. slits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/045—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with a plurality of burner bars assembled together, e.g. in a grid-like arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/10—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head
    • F23D14/105—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head with injector axis parallel to the burner head axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/78—Cooling burner parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/108—Flame diffusing means with stacked sheets or strips forming the outlets

Definitions

  • the invention relates to an atmospheric gas burner for heating devices, in particular water heaters, according to the preamble of the main claim.
  • Gas burners operating according to this principle are known (FR-PS 2 199 853), the burner plate of which is made up of ribs, the ribs being penetrated by a pipe system through which coolant flows in order to reduce the burner plate temperature and flame temperature.
  • the arrangement according to the invention with the features of the main claim has the advantage that it is possible to produce a compact atmospheric gas burner with a low overall height, which at the same time has low pollutant emissions, in particular low NOx, due to flame cooling and complete superstoichiometric premixing (air ratio ⁇ > 1) of the fuel gas with the combustion air and CO values.
  • air ratio ⁇ > 1 air ratio of the fuel gas with the combustion air and CO values.
  • the overall height of a heater provided with this burner can be kept low overall.
  • cylindrical flow channels An advantageous alternative to cylindrical flow channels consists in the formation of elongated flow channels, to which several nozzles are assigned in the inlet area.
  • the injector arrangement consists only of an elongated flow channel, to which all the nozzles for the gas supply are assigned in the inlet area. This further reduces flow resistance, sensitivity to positioning tolerances and manufacturing costs.
  • the injector arrangement, deflection area and mixture distributor can be produced in one piece. Due to the surface-enlarging fins connected to a cooling pipe system, the temperatures on the burner plate are limited to values that allow the use of an elastic seal between the mixture distributor and the burner plate.
  • the tube carrying the coolant is made of copper, while the fins of the burner plate are preferably made of stainless steel due to the higher thermal load.
  • the pronounced structuring of the burner plate can be achieved by providing one or more set back or shortened set between two non-set back sheet metal ribs.
  • FIG. 1 shows a longitudinal section of the gas burner according to the invention
  • FIG. 2 shows a section of the gas burner along the line AA in FIG. 1
  • FIG. 3 shows an enlarged section of the burner plate
  • 4 shows a plan view of the burner plate
  • FIGS. 5 and 6 show two further embodiments of injectors.
  • FIG. 1 shows a gas burner 10 with a gas supply device 14 which has a nozzle 12 and is spaced apart in the flow direction from a horizontally oriented injector arrangement 16 of the gas burner 10 in such a way that the nozzles 12 are each cylindrical at a distance
  • Flow channel 18 is opposite, the nozzles 12 being arranged at the level of the central axes of the flow channels 18.
  • the central axes of the flow channels 18 run essentially in a straight line, the flow cross section except for an extension 20 in the form of an inlet
  • Inlet area is substantially constant.
  • the ratio length to diameter of the flow channels 18 arranged in the injector 16 is ⁇ 4: 1, deviating from known injector arrangements for gas burners, in which the factor is 10 to 12.
  • a 90 ° deflection region 22 adjoining the injector arrangement 16 in the flow direction of the fuel gas / air mixture merges into a mixture distributor 24 which is widened to the funnel shape and at the outlet of which a burner plate 26 which is sealed off from the mixture distributor 24 is arranged.
  • the burner plate 26, which is fixed with fastening means 28 with respect to the mixture distributor 24, is constructed with fins or ribs 30, 31 (FIG. 3) of different lengths, which are connected to one another by a cooling pipe coil 32 and between them channels or gaps 34 for the passage of the fuel gas Limit the air mixture that is flammable on the side of the burner plate 26 facing the combustion chamber.
  • the ribs 30, 31 made of stainless steel are in good heat-conducting contact with the copper existing cooling tube coils 32 and are connected by this to form a rigid structural unit.
  • the width a of the column 34 is smaller than the so-called extinguishing distance, so that flames cannot strike back into the burner plate 26 or into the mixture distribution zone in front of it.
  • the burner plate 26 is designed so that two shorter ribs 31 are each between two longer ribs 30.
  • the arrangement is such that the edges 36 of the shorter ribs 31 on the combustion chamber side are set back relative to the edges 38 of the longer ribs 30.
  • the burner plate 26 is closed off at the side by end lamellae 44, 46 which protrude into the combustion chamber and prevent the flame arising during combustion from flashing over.
  • FIG. 4 shows a plan view of the burner plate 26 and shows the course of the cooling tube coils.
  • the gas burner 10 operates in the following way:
  • Fuel gas is injected into the flow channels 18 of the injector arrangement 16 via the gas nozzles 12, ambient air being entrained by the fuel gas flow.
  • the entire burner system nozzle pressure, injectors, deflection area, burner plate, etc.
  • the extension 20 designed as an inlet at the inlet of the flow channels 18 enables a low-friction entry of the combustion air into the Flow channel 18.
  • the fuel gas-air mixture that forms in the flow channels 18 strikes the deflection area 22, where the fuel gas is further mixed with the combustion air by swirling. Due to the funnel-shaped mixture distributor 24 which adjoins the deflection region 22, homogenization takes place in addition to the distribution of the mixture; in addition, the reduction in speed converts a high proportion of the dynamic pressure into the static pressure required for combustion.
  • the mixture reacts between or at the downstream edges 36, 38 of the fins 30, 31 with the formation of flames, heat of reaction from the flame roots via the fins 30, 31 to the water to be heated arrives in the coil 32.
  • the flame roots are cooled particularly well here because they also have side contact with the wall regions 42 of the ribs 30.
  • the thermal conductivity of the ribs 30, 31 is by design and / or
  • the material selection is matched to the burner output so that its surface temperature is set to, for example, 400 ° C.
  • FIGS. 5 and 6 show two further injector arrangements in which the cylindrical flow channels 18 are replaced by elongated flow channels, the injector arrangement according to FIG. 6 having only one elongated flow channel 58. In the latter case, all nozzles 12 are then assigned to the flow channel 58.
  • a particularly cost-effective production of the burner is achieved if the injector arrangement (16), deflection area (22) and mixture distributor (24) are made from a die-cast part.

Landscapes

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

Abstract

La présente invention concerne un brûleur atmosphérique pour appareils de chauffage, notamment des chauffe-eau, avec a) un dispositif d'amenée de gaz (14) comprenant plusieurs tuyères (12), b) un bloc injecteur (16) comportant au moins un canal d'écoulement (18) pour le mélange gaz-air, c) une zone d'inversion (22) se raccordant dans la direction du flux au bloc injecteur et débouchant dans un distributeur de mélange (24) qui va en s'élargissant (24), et d) un déversoir de distributeur de mélange (24), doté d'ailettes (30, 31) associées par le biais d'un système de tubes de refroidissement (32) et définissant entre elles des canaux ou des fentes (34) pour le passage du mélange gaz-air, que l'on enflamme sur une plaque de brûleur (26) orientée vers la chambre de combustion. On peut ainsi concevoir un brûleur compact de faible hauteur et à faible émission de NOx et de CO.
EP97941865A 1996-10-04 1997-09-04 Bruleur atmospherique Expired - Lifetime EP0865590B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19641040A DE19641040A1 (de) 1996-10-04 1996-10-04 Atmosphärischer Gasbrenner
DE19641040 1996-10-04
PCT/DE1997/001938 WO1998015781A1 (fr) 1996-10-04 1997-09-04 Bruleur atmospherique

Publications (2)

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

Family

ID=7807918

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97941865A Expired - Lifetime EP0865590B1 (fr) 1996-10-04 1997-09-04 Bruleur atmospherique

Country Status (6)

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

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19954811A1 (de) * 1999-11-13 2001-05-17 Bosch Gmbh Robert Lamellenbrenner
DE10008549B4 (de) * 2000-02-24 2004-03-25 Robert Bosch Gmbh Brennerkopf mit Metallplatte und Rohrabschnitten für eine Kühlflüssigkeit
DE20109170U1 (de) * 2001-06-05 2002-10-10 Viessmann Werke Kg Atmosphärischer Gasbrenner
DE10213132B4 (de) * 2002-03-23 2005-06-02 Robert Bosch Gmbh Gasbrenner
DE202007018472U1 (de) 2007-03-31 2008-08-21 Robert Bosch Gmbh Vormischender Gasbrenner
TWI611146B (zh) * 2016-09-26 2018-01-11 Grand Mate Co Ltd 燃燒器

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL293270A (fr) *
DE1274055B (de) * 1963-02-14 1968-08-01 Vaillant Joh Kg Aus mehreren Einzelbrennern bestehender Gruppenbunsenbrenner, insbesondere fuer Gaswassererhitzer
NL6508630A (fr) * 1965-07-05 1967-01-06
US3897198A (en) * 1972-04-17 1975-07-29 Radiation Ltd Gaseous fuel burners
DE8120009U1 (de) * 1981-07-09 1982-12-30 Robert Bosch Gmbh, 7000 Stuttgart Atmosphaerischer allgasbrenner, insbesondere fuer haushaltgeraete
NL8900030A (nl) * 1989-01-06 1990-08-01 Remeha Fabrieken Bv Nox-arme atmosferische gasbrander.
NL193596C (nl) * 1989-03-14 2000-03-02 Rendamax Bv Branderkop voor een gasbrander van het type oppervlaktebrander.
DE4428097A1 (de) * 1994-08-09 1996-02-22 Bosch Gmbh Robert Verfahren zum Betreiben eines Heizgerätes sowie Heizgerät zur Durchführung des Verfahrens
DE4445460A1 (de) * 1994-12-20 1996-06-27 Bosch Gmbh Robert Gasbrenner für Heizgeräte, insbesondere Wassererhitzer
DE19540772A1 (de) * 1995-11-02 1997-05-07 Buderus Heiztechnik Gmbh Atmosphärischer Gasbrenner
DE29604471U1 (de) * 1996-03-11 1996-05-23 Buderus Heiztechnik Gmbh, 35576 Wetzlar Vormischgasbrenner

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9815781A1 *

Also Published As

Publication number Publication date
ES2178002T3 (es) 2002-12-16
JP2000502436A (ja) 2000-02-29
WO1998015781A1 (fr) 1998-04-16
EP0865590B1 (fr) 2002-05-22
DE59707327D1 (de) 2002-06-27
KR19990071702A (ko) 1999-09-27
DE19641040A1 (de) 1998-04-23

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