EP1552218A1 - Bruleur, notamment bruleur venturi avec tube de chambre de combustion - Google Patents

Bruleur, notamment bruleur venturi avec tube de chambre de combustion

Info

Publication number
EP1552218A1
EP1552218A1 EP03750323A EP03750323A EP1552218A1 EP 1552218 A1 EP1552218 A1 EP 1552218A1 EP 03750323 A EP03750323 A EP 03750323A EP 03750323 A EP03750323 A EP 03750323A EP 1552218 A1 EP1552218 A1 EP 1552218A1
Authority
EP
European Patent Office
Prior art keywords
combustion chamber
burner
end wall
tube
burner 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.)
Granted
Application number
EP03750323A
Other languages
German (de)
English (en)
Other versions
EP1552218B1 (fr
Inventor
Christian Bäcker
Michael Keppler
Steffen Weber
Felix Wolf
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.)
Webasto SE
Original Assignee
Webasto SE
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 Webasto SE filed Critical Webasto SE
Publication of EP1552218A1 publication Critical patent/EP1552218A1/fr
Application granted granted Critical
Publication of EP1552218B1 publication Critical patent/EP1552218B1/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
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details, e.g. burner cooling means, noise reduction means
    • F23D11/40—Mixing tubes or chambers; Burner heads
    • F23D11/408—Flow influencing devices in the air tube
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details, e.g. burner cooling means, noise reduction means
    • F23D11/38—Nozzles; Cleaning devices therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/00018—Means for protecting parts of the burner, e.g. ceramic lining outside of the flame tube

Definitions

  • Burner especially Venturi burner, with a combustion chamber tube
  • the invention relates to a burner, in particular a Venturi burner for a mobile heater, with a burner nozzle on an end face of a combustion chamber, a combustion chamber tube which surrounds the combustion chamber, and a combustion chamber end wall which delimits the combustion chamber towards the burner nozzle.
  • the invention further relates to a mobile heater with such a burner.
  • Burners are used in mobile heaters, in particular for use as auxiliary heating in vehicles or airplanes, which convert the energy stored in liquid or gaseous fuels into thermal energy.
  • the burners basically consist of a burner nozzle for spraying and processing the liquid fuel, and a combustion chamber into which the fuel prepared in this way is sprayed. Air is also supplied to the burner nozzle and the combustion chamber for the combustion of the fuel.
  • the burned fuel exits the combustion chamber as exhaust gas into a flame tube and subsequently through a heat exchanger into an exhaust pipe.
  • components of the heater are also arranged on the side of the burner nozzle facing away from the combustion chamber, which components are not exposed to high thermal loads allowed to.
  • Such components can be, for example, electronic components of a control unit of the heater.
  • the area of the combustion chamber must also be hermetically sealed from the environment and a possible escape of fuel gas to the side of the burner nozzle facing away from the combustion chamber must be reliably prevented.
  • a burner with a Venturi nozzle is known from DE 100 19 890 A1, in which a combustion chamber tube surrounding the combustion chamber is designed with double walls with two tube walls at its end region facing the burner nozzle.
  • the two tube walls lie close together and are each provided with a collar at the end.
  • the collar of the inner tube wall is directed towards the burner nozzle, while the collar of the outer tube wall faces away from the burner nozzle and towards an outer housing.
  • the burner nozzle is fastened to the collar of the inner tube wall and the combustion chamber tube itself is fastened to the outer housing with the collar of the outer tube wall.
  • a combustion chamber end wall is formed with the two collars, which is fastened radially on the outside to the outer housing and to which the burner nozzle is fastened radially on the inside.
  • a secure seal In the case of a burner with a Venturi nozzle, a secure seal must be created between the burner nozzle and the combustion chamber end wall.
  • a seal is used between the burner nozzle and the combustion chamber end wall in the burner according to DE 100 19 890 A1. This seal is so large that it also serves as a seal between the combustion chamber end wall (ie the collar of the outer tube wall) and the outer housing radially on the outside. In this way, a hermetic seal can be created in two areas at the same time with the help of a single seal. The seal is used to seal between the inner and the outer tube wall, thus creating an undefined air supply prevented in the combustion chamber.
  • the arrangement according to DE 100 19 890 A1 has the disadvantage, however, that leaks can occur due to dimensional fluctuations in the individual components (in particular the outer housing and the tube walls of the combustion chamber tube).
  • such components which are located on the side of the burner nozzle facing away from the combustion chamber, can only be shielded from the high temperatures in the combustion chamber with greater effort.
  • the invention has for its object to improve a heater of the type mentioned in such a way that it is cheaper to manufacture in the area of its burner and in particular the above-mentioned problems with regard to the sealing of the combustion chamber and with regard to the thermal decoupling of heat-sensitive components of the heater from the burner are overcome.
  • This object is achieved according to the invention with an above-mentioned burner, in which in particular the burner nozzle is held solely on the combustion chamber end wall, the combustion chamber pipe is held solely on its end region facing away from the combustion chamber end wall on an outer pipe, and an annular gap permeable to air is located between the combustion chamber end wall and the outer pipe is trained. Furthermore, the object is achieved with a heater which is equipped with such a burner.
  • the burner nozzle is held solely on the end wall of the combustion chamber, so that a seal can be created there in a simple and effective manner.
  • the combustion chamber tube is solely attached to an outer tube at its end facing away from the burner nozzle. In this area too, a seal can be created in a simple manner, for example by means of a weld seam.
  • the burner nozzle is solely attached to the end of the combustion chamber tube facing away from the burner nozzle via the combustion chamber end wall and the combustion chamber tube. Furthermore, an annular gap is formed between the combustion chamber end wall and the outer housing. In this way, thermal decoupling is created in the area of the combustion chamber end wall. The thermal energy generated in the combustion chamber and transferred to the burner nozzle, the combustion chamber end wall and the combustion chamber tube is therefore transferred in the heater according to the invention only at the end of the combustion chamber tube facing away from the burner nozzle by heat conduction onto the outer tube. Components that are located on the side of the burner nozzle facing away from the combustion chamber are thus better protected against heat input.
  • the burner nozzle is provided with at least one first opening through which primary air can be introduced into the combustion chamber.
  • a first opening serves to improve the atomization of the liquid fuel in the burner nozzle. Due to the arrangement of the burner nozzle according to the invention, the opening is freely accessible for primary air, so that a wide variety of types of air supply channels can be formed on the burner nozzle.
  • the combustion chamber end wall is provided with at least one second opening through which secondary air can be introduced into the combustion chamber.
  • Such a secondary air supply creates a staged combustion air supply with which the quality of the combustion can be improved and thus the overall pollutant emissions of the burner can be reduced.
  • the first and second openings mentioned can be sealed with the arrangement according to the invention particularly advantageously against a common supply of combustion air.
  • the arrangement according to the invention in the region of the combustion chamber forms the prerequisite for the combustion chamber tube to be provided with at least one third opening through which tertiary air can be introduced into the combustion chamber.
  • the quality of the combustion can be further increased in this way.
  • baffle plate is arranged in the combustion chamber and the third opening in the combustion chamber tube is formed in such a way that the baffle plate is cooled with the aid of the tertiary air.
  • a targeted cooling of the baffle plate reduces its temperature during the ' combustion. It is therefore possible that a less temperature-resistant and therefore less expensive material is used for the baffle plate.
  • the arrangement according to the invention can be sealed in a particularly simple manner with respect to the area of the heater facing away from the combustion chamber by arranging a first seal between the burner nozzle and the combustion chamber end wall.
  • This first seal can be made specifically from a temperature-resistant material.
  • the seal can be preassembled when the burner nozzle is mounted on the combustion chamber end wall, so that a tightness check is already possible subsequently. Furthermore, such Assembled unit consisting of burner nozzle and combustion chamber to be tested for its proper function.
  • the outer tube is advantageously held on an outer housing at its end region facing the burner nozzle, and a second seal is arranged between the outer tube and the outer housing.
  • An outer tube held in this way can be washed around the outside by liquid heat transfer medium, for example, and can be cooled in the process.
  • the outer tube is fastened to an outer housing cooled by liquid heat transfer medium.
  • the second seal can be designed specifically from a material that is considerably less temperature-resistant than the first seal mentioned above. Because the first and the second seal are arranged separately from one another according to the invention, dimensional tolerances in the axial direction of the combustion chamber have no effect in the seal concept according to the invention. In addition, thermal expansion of the combustion chamber end wall in the radial direction can be better compensated for.
  • the second seal only needs to be installed in the heater during final assembly of the burner and therefore cannot be damaged during the previous pre-assembly of the burner.
  • a shielding wall can also advantageously be arranged on the outer tube at its end facing the burner nozzle, by means of which components which are arranged on the side of the burner nozzle facing away from the combustion chamber are shielded against heat from the combustion chamber end wall.
  • the shielding wall can be held in a particularly simple manner in the region of the second seal on the outer housing of the heater. It can have flow control devices by means of which the secondary and / or the tertiary air flow can be influenced with regard to the air volume per unit of time.
  • Fig. 1 shows a longitudinal section of a burner in a mobile heater according to the invention.
  • FIG. 1 A mobile heater 10 in the area of a burner 12 is illustrated in FIG. 1.
  • the burner 12 is designed as a Venturi burner and has as essential components a burner nozzle 14 and a cylindrical combustion chamber 16, which is surrounded radially on the outside by a combustion chamber tube 18 and is delimited by a combustion chamber end wall 20 on the end face facing the burner nozzle 14.
  • the burner nozzle 14 is formed with an essentially cylindrical nozzle body 22, in which a plurality of radial channels 24 for supplying primary air into a first opening 26 of the nozzle body 22 are formed at its end region facing away from the combustion chamber 16.
  • the first opening 26 is formed in the central region of the nozzle body 22 and is flared in the direction of the combustion chamber 16.
  • a fuel feed line 28 serves to supply liquid fuel into the first opening 26 of the nozzle body.
  • the nozzle body 22 of the burner nozzle 26 is held solely on the combustion chamber end wall 20, a central opening 30 being formed in the combustion chamber end wall 20 through which the fuel atomized in the first opening 26 can enter the combustion chamber 16.
  • further radial channels 32 are formed on the contact surface with the combustion chamber end wall 20, through which the secondary air leads to second openings 34 in the combustion chamber end wall 20 becomes. The secondary air enters the combustion chamber 16 through these second openings 34 and there leads to a staged combustion with high combustion quality.
  • a first seal 36 made of a heat-resistant material is arranged between the nozzle body 22 and the combustion chamber end wall, by means of which the nozzle body 22 is sealed off from the combustion chamber 16 and at the same time is fastened to the combustion chamber end wall.
  • the combustion chamber end wall 20 is formed as an angled section or as a collar of a tube which forms the combustion chamber tube 18 in its otherwise cylindrical section.
  • the combustion chamber tube 18 is welded to an outer tube 40 at its end region 38 facing away from the combustion nozzle 14.
  • the weld seam surrounds the combustion chamber tube 18 in an annular manner, an essentially annular contact surface being formed between the combustion chamber tube 18 and the outer tube 40, via which only small amounts of thermal energy are transferred from the combustion chamber tube 18 to the outer tube 40.
  • annular gap 42 is formed between the combustion chamber end wall 20 and the outer tube 40, but also between the combustion chamber tube 18 and the outer tube 40, which is particularly for thermal decoupling of the
  • Combustion chamber end wall 20 leads relative to components which are located on the side of the burner nozzle 14 facing away from the combustion chamber 16.
  • Such components can be electronic components, for example, which are not further illustrated in FIG. 1.
  • thermal energy of the nozzle body 22 can only be transferred to the outer tube 40 by heat conduction over the relatively long distance to the end region 38 of the combustion chamber tube 18 facing away from the burner nozzle 14.
  • Tertiary air can also be conducted through the annular gap 42 to third openings 44 are, which are formed approximately axially in the middle of the combustion chamber tube 18 distributed over its circumference.
  • a baffle plate 46 is also held in the combustion chamber tube 18 and is cooled by means of the combustion air supplied through the third openings 44.
  • annular gap 42 leads to a changed sealing concept, which is explained in more detail below.
  • the outer tube 40 is formed at its end region facing away from the burner nozzle 14 with a first collar 48, to which a flame tube 50 is fastened. At its end region facing the burner nozzle 14, the outer tube 40 is provided with a second collar 52 which projects radially outward. This second collar 52 is clamped between a first and a second section 54 or 56 of a housing of the heater 10, which housing is not illustrated.
  • a shielding wall 58 is also clamped between the sections 54 and 56, which projects radially inward in front of the combustion chamber end wall 20 on the side of the combustion chamber end wall 20 facing away from the combustion chamber 16.
  • the shielding wall 58 fastened in such a particularly simple manner serves to shield the above-mentioned components from the heat generated in the combustion chamber 16.
  • the outer tube 40 is surrounded radially on the outside by a heat transfer chamber 60, in which a liquid heat transfer medium flows.
  • a second seal 60 is arranged on the second collar 52 of the outer tube 40, by means of which the outer tube 40 is sealed in the region of the clamping with the sections 54 and 56 of the housing from the heat transfer chamber 62.
  • the second seal 60 is particularly tailored to the requirements of sealing the heat transfer chamber 62 from the space around the burner nozzle 14.
  • the liquid heat transfer medium flowing in the heat transfer chamber 62 must not exit into the area around the burner nozzle 14.
  • the second seal 60 is made of a material that is well fluid-carrying Seals space and at the same time only has to withstand relatively low temperatures.
  • first and second seals 36 and 60 can be optimally sealed regardless of dimensional tolerances on the burner 12, and their material and shape can be optimally adapted to the respective sealing tasks.
  • the materials of the two seals 36 and 60 can each be optimally adapted to the prevailing temperature conditions in the sealing areas.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
  • Nozzles For Spraying Of Liquid Fuel (AREA)
  • Spray-Type Burners (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Combustion Of Fluid Fuel (AREA)
EP03750323A 2002-09-06 2003-09-05 Bruleur, notamment bruleur venturi avec tube de chambre de combustion Expired - Lifetime EP1552218B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10241791A DE10241791B4 (de) 2002-09-06 2002-09-06 Brenner, insbesondere Venturibrenner, mit einem Brennkammerrohr
DE10241791 2002-09-06
PCT/DE2003/002955 WO2004025178A1 (fr) 2002-09-06 2003-09-05 Bruleur, notamment bruleur venturi avec tube de chambre de combustion

Publications (2)

Publication Number Publication Date
EP1552218A1 true EP1552218A1 (fr) 2005-07-13
EP1552218B1 EP1552218B1 (fr) 2008-05-21

Family

ID=31724578

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03750323A Expired - Lifetime EP1552218B1 (fr) 2002-09-06 2003-09-05 Bruleur, notamment bruleur venturi avec tube de chambre de combustion

Country Status (7)

Country Link
EP (1) EP1552218B1 (fr)
AT (1) ATE396367T1 (fr)
AU (1) AU2003269699A1 (fr)
DE (3) DE10241791B4 (fr)
ES (1) ES2307967T3 (fr)
RU (1) RU2309330C2 (fr)
WO (1) WO2004025178A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108788775A (zh) * 2018-08-03 2018-11-13 重庆宏钢数控机床有限公司 一种外防护罩机床床身的制作工艺

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004033618B4 (de) * 2004-07-12 2016-11-03 Webasto Ag Fahrzeugheizgerät
DE102006003150B4 (de) * 2006-01-23 2009-04-16 Webasto Ag Zusatzheizgerät mit einem Brenner der Einspritzbauart
DE102006011727B3 (de) * 2006-03-14 2007-11-22 Webasto Ag Kombiniertes Heizungs-/Warmwassersystem für mobile Anwendungen
CN100458281C (zh) * 2006-07-05 2009-02-04 山东大学 液体燃料的蒸发混合燃烧方式及其燃烧室
DE102013220653B4 (de) 2013-10-14 2019-12-05 Eberspächer Climate Control Systems GmbH & Co. KG Brennkammerbaugruppe, insbesondere für einen Verdampferbrenner
CN107379924A (zh) * 2017-09-04 2017-11-24 郑州振资汽车配件有限公司 用于驻车空暖加热器的导流体总成
CN114963168B (zh) * 2022-06-27 2022-11-29 杭州富丽达热电有限公司 一种清洁煤高效燃烧装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB849179A (en) * 1959-01-14 1960-09-21 Stewart Warner Corp Vehicle heater burner
DE3318054C2 (de) * 1982-05-21 1986-10-09 Fa. J. Eberspächer, 7300 Esslingen Brenner für kleine Luftheizgeräte zur Beheizung ortsbeweglicher Räume
JPS6138316A (ja) * 1984-07-30 1986-02-24 Sanyo Electric Co Ltd 液体燃料燃焼装置
DE3713460A1 (de) * 1987-04-22 1988-11-10 Webasto Ag Fahrzeugtechnik Verdampfungsbrenner
DE3900438A1 (de) * 1989-01-10 1990-07-12 Webasto Ag Fahrzeugtechnik Heizgeraet, insbesondere fahrzeugheizgeraet
DE3942747A1 (de) * 1989-12-22 1991-06-27 Eberspaecher J Fahrzeug-heizgeraet, insbesondere kraftfahrzeug-zusatzheizgeraet
DE10019198A1 (de) * 2000-04-17 2001-10-18 Webasto Thermosysteme Gmbh Zerstäuberbrenner
DE10019890C2 (de) * 2000-04-20 2003-05-22 Webasto Thermosysteme Gmbh Brenner mit Flammrohr
DE10039152A1 (de) * 2000-08-06 2002-02-14 Webasto Thermosysteme Gmbh Zerstäuberbrenner

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004025178A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108788775A (zh) * 2018-08-03 2018-11-13 重庆宏钢数控机床有限公司 一种外防护罩机床床身的制作工艺
CN108788775B (zh) * 2018-08-03 2019-11-08 重庆宏钢数控机床有限公司 一种外防护罩机床床身的制作工艺

Also Published As

Publication number Publication date
RU2309330C2 (ru) 2007-10-27
DE10393705D2 (de) 2005-07-21
RU2005109936A (ru) 2005-10-27
DE10241791B4 (de) 2004-09-23
ATE396367T1 (de) 2008-06-15
ES2307967T3 (es) 2008-12-01
WO2004025178A1 (fr) 2004-03-25
DE10241791A1 (de) 2004-03-18
DE50309895D1 (de) 2008-07-03
AU2003269699A1 (en) 2004-04-30
EP1552218B1 (fr) 2008-05-21

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