EP0908670B1 - Dispositif pour actionner un brûleur atmosphérique à gaz - Google Patents

Dispositif pour actionner un brûleur atmosphérique à gaz Download PDF

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Publication number
EP0908670B1
EP0908670B1 EP19980118621 EP98118621A EP0908670B1 EP 0908670 B1 EP0908670 B1 EP 0908670B1 EP 19980118621 EP19980118621 EP 19980118621 EP 98118621 A EP98118621 A EP 98118621A EP 0908670 B1 EP0908670 B1 EP 0908670B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
gas
fuel
gas burner
central nozzle
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
EP19980118621
Other languages
German (de)
English (en)
Other versions
EP0908670A1 (fr
Inventor
Ulrich Besser
Kersten Wehmeier
Marcus Bienzle
Klaus Danner
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
Priority claimed from DE19810750A external-priority patent/DE19810750A1/de
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0908670A1 publication Critical patent/EP0908670A1/fr
Application granted granted Critical
Publication of EP0908670B1 publication Critical patent/EP0908670B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/60—Devices for simultaneous control of gas and combustion air

Definitions

  • the invention is based on a device for operating an atmospheric Gas burner according to the upper handle of claim 1.
  • a known gas burner of this type is known from EP 657 693 A2.
  • the atmospheric gas burner known from EP 657 693 A2 is a central main nozzle assigned a second, external secondary nozzle, which is inclined in the jet of Main nozzle is directed.
  • the inclined auxiliary nozzle also turns fuel into injected the main jet, with both the main nozzle and the secondary nozzle are fed by a common gas flow and only by means of the main nozzle a closure element is controllable.
  • the invention Device allows a simple Variation of the air-fuel ratio leading to Compensation for changes in the fuel-air ratio over the modulation range and / or to adjust the Gas burner on different fuels without changing the nozzle can be used. Furthermore, the arrangement according to the invention from a simple structure, that works without moving parts.
  • the distribution of the total flow of fuel gas into one Centrally aligned with respect to the mixing tube opening Part gas flow and at least one other non-central aligned partial gas flow takes place via the set or required burner capacity by Keeping the fuel-air ratio constant above that entire modulation range of the gas burner a central Nozzle is provided for a maximum required Combustion air intake at nominal load of the Gas burner is designed while an outer nozzle is provided is the minimum combustion air intake required is designed in the partial load range of the gas burner.
  • the gas supply takes place in such a way that with decreasing Burner load an increasingly larger proportion of the supplied fuel passes through the outer nozzle while the partial gas flow emerging through the central nozzle is reduced. Because the relationship between burner performance and air ratio ⁇ especially with atmospheric burners low pollution tendency is fixed, the Distribution of the partial gas flows in a characteristic curve or Characteristic family of curves stored in the control unit of the heater become.
  • the presence of two separately controllable Fuel supplies to the injector system can be advantageous also for a temporary enrichment of the fuel-air mixture be used when the gas burner is cold started.
  • Figure 1a shows that Injector system of the gas burner with the nozzle system in the Section and the entrance area of the mixing tube in Side view
  • Fig. 1b an alternative embodiment of a Gas supply
  • Fig. 1c an alternative embodiment of the Nozzle system.
  • the injector system a central nozzle 10 with a circular cross-section, from a Ring nozzle 12a is surrounded concentrically.
  • the ring nozzle 12a has a larger outlet cross section than the central nozzle 10 and is opposite this in the flow direction of the Axially set fuel.
  • the central nozzle 10 is made from a gas manifold 18 fed, which the fuel via a control valve 20th is fed.
  • the ring nozzle 12a is with a Gas manifold 22 connected into which the fuel a control valve 24 arrives.
  • the control valves 20 and 24 that are charged with the same gas are on a Control unit 26 of a combustion control device connected, which depends on the fuel gas supply on the load status of the gas burner and / or the one used Gas type distributed to the two nozzles 10 and 12a.
  • Fig. 1b is a second alternative embodiment of the gas supply shown. Under The two are maintaining double security Valves for the gas distribution pipes 18, 22 in this case as combined safety / control valves 32, 34 are formed, which together is preceded by a safety valve 36.
  • Control unit 26 Due to their larger outlet cross-section the air intake deteriorates, causing the basic increase in air ratio at low load counteracted and the desired fuel-air ratio is kept constant.
  • Such control of Gas supply can be in a characteristic curve or family of curves in the Control unit 26 are stored.
  • the outer nozzle instead of the ring nozzle 12a Individual nozzles arranged radially to the central nozzle 10 or Single holes 12b used.
  • the sum of the Exit cross sections of the individual nozzles 12b is also larger than the outlet cross section of the central nozzle 10.
  • the individual nozzles 12b are like that Embodiment according to Figure 1a compared to the central Nozzle 10 axially in the direction of flow of the fuel set back. The distribution of the gas flows can on the same way as the first Embodiment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulation And Control Of Combustion (AREA)

Claims (4)

  1. Brûleur atmosphérique à gaz pour appareil de chauffage, en particulier avec prémélange total du combustible et de l'air, dans lequel :
    un système d'injecteur est équipé de moyens pour influencer la caractéristique d'aspiration et donc le rapport combustible/air et comporte une tuyère centrale (10) ainsi qu'au moins une seconde tuyère externe (12a, 12b),
    la section de sortie de la tuyère centrale (10) est plus petite que la section de sortie de la tuyère (12a, 12b) ou que la somme des sections de sortie de ces tuyères,
    l'ouverture de sortie de la tuyère externe (12a, 12b) est décalée axialement vers l'arrière par rapport à la tuyère centrale (10),
    caractérisé en ce que
    la tuyère externe est une tuyère annulaire (12a) montée concentriquement par rapport à la tuyère centrale (10),
    la commande de l'amenée du gaz à la tuyère centrale (10) et à la tuyère externe (12) est assurée par deux soupapes de régulation (20, 24),
    le réglage du rapport prédéfini combustible/air du courant gazeux partiel dirigé centralement est augmenté quand la charge du brûleur augmente, et inversement, tandis que le courant gazeux partiel qui n'est pas dirigé centralement est défini en fonction de l'indice d'air λ détecté pendant la combustion.
  2. Brûleur à gaz selon la revendication 1,
    caractérisé en ce que
    en amont des deux soupapes de régulation (20, 24) sont montées en commun deux soupapes de sécurité (28, 30).
  3. Brûleur à gaz selon la revendication 1,
    caractérisé en ce que
    les soupapes de régulation sont des soupapes combinées de sécurité et de régulation (32, 34) en amont desquelles est montée une soupape de sécurité commune (36).
  4. Brûleur à gaz selon la revendication 1,
    caractérisé en ce que
    la répartition de l'amenée de combustible à la tuyère centrale (10) et à la tuyère externe (12a, 12b) prévoit un enrichissement du mélange combustible/air lors du démarrage à froid du brûleur à gaz.
EP19980118621 1997-10-06 1998-10-01 Dispositif pour actionner un brûleur atmosphérique à gaz Expired - Lifetime EP0908670B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19744082 1997-10-06
DE19744082 1997-10-06
DE19810750 1998-03-12
DE19810750A DE19810750A1 (de) 1997-10-06 1998-03-12 Verfahren und Vorrichtung zum Betreiben eines atmosphärischen Gasbrenners

Publications (2)

Publication Number Publication Date
EP0908670A1 EP0908670A1 (fr) 1999-04-14
EP0908670B1 true EP0908670B1 (fr) 2004-07-28

Family

ID=26040616

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980118621 Expired - Lifetime EP0908670B1 (fr) 1997-10-06 1998-10-01 Dispositif pour actionner un brûleur atmosphérique à gaz

Country Status (1)

Country Link
EP (1) EP0908670B1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB230149A (en) * 1923-11-29 1925-03-02 George Helps Improvements in gas burners
CH314202A (de) * 1952-04-03 1956-05-31 Schweiz Gasapparatefabrik Solo Regulierbarer Gasbrenner mit mehreren sukzessive zueinander parallel schaltbaren Gasaustrittsdüsen
DE3829664C1 (fr) * 1988-09-01 1990-01-18 Karl Dungs Gmbh & Co, 7060 Schorndorf, De
AT399382B (de) 1993-03-11 1995-04-25 Vaillant Gmbh Atmosphärischer vormisch-gasbrenner
DE4341997A1 (de) * 1993-12-09 1995-06-14 Gogas Goch Gmbh & Co Gasbrenner

Also Published As

Publication number Publication date
EP0908670A1 (fr) 1999-04-14

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