EP0657691A1 - Elément mélangeur et diffuseur pour un brûleur atmosphérique - Google Patents

Elément mélangeur et diffuseur pour un brûleur atmosphérique Download PDF

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Publication number
EP0657691A1
EP0657691A1 EP94203004A EP94203004A EP0657691A1 EP 0657691 A1 EP0657691 A1 EP 0657691A1 EP 94203004 A EP94203004 A EP 94203004A EP 94203004 A EP94203004 A EP 94203004A EP 0657691 A1 EP0657691 A1 EP 0657691A1
Authority
EP
European Patent Office
Prior art keywords
edge
box
type body
conduit
apertured
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.)
Withdrawn
Application number
EP94203004A
Other languages
German (de)
English (en)
Inventor
Giuseppe Fogliani
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.)
Beckett Thermal Solutions SRL
Original Assignee
Worgas Bruciatori SRL
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 Worgas Bruciatori SRL filed Critical Worgas Bruciatori SRL
Publication of EP0657691A1 publication Critical patent/EP0657691A1/fr
Withdrawn legal-status Critical Current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
    • F23D14/02—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
    • 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
    • F23D2900/00003—Fuel or fuel-air mixtures flow distribution devices upstream of the outlet

Definitions

  • the present invention relates to gas burners of the atmospheric type, and in particular, to a mixing diffuser element for such a burner.
  • a mixing diffuser element which comprises a flattened box-type body having an apertured edge, and a venturi conduit which connects to the box-type body.
  • An element of this kind is shown in Figure 1 of the accompanying drawings.
  • a gaseous fuel issuing from a respective nozzle, not shown, is drawn into the venturi, shown at 10 in the drawing, and admixed to air, and the resultant mixture is caused to flow, while undergoing expansion, through the box-type body, shown at 11, whence it comes out through openings 12 in a U-shaped section member 13 which defines one edge of the box-type body.
  • the mixture burns in an array of flames which issue from the openings 12.
  • a number of such elements can be mounted side-by-side in a respective supporting structure to form a burner having a desired thermal rating.
  • a typical application of a burner of this kind is in the supply of heat to a heat exchanger for small to medium size boilers.
  • the box-type body should have a height dimension, as measured in a perpendicular direction to the edge with the mixture outlet openings, which is not below a value set by the structural characteristics of the body and the venturi, by the size of the openings, the pressure of the gas jet, etc..
  • the object of the present invention is to provide a mixing diffuser element for a burner of the atmospheric type, which has reduced space requirements, while ensuring excellent outflow uniformity for the air/gas mixture which issues from its openings.
  • the box-type body is formed, near its apertured edge, with a throat whose breadth varies inversely with the local velocity of the air/gas mixture. This arrangement enables the height of the box-type body to be significantly reduced, while keeping the mixture flow rate at the openings constant.
  • the mixing diffuser element illustrated by Figures 2 to 7 has a flattened box-type body 11' and a venturi-type of conduit 10' similar to those of the known element in Figure 1 and being comprised of two half-shells conventionally formed from sheet metal by a dimpling process.
  • the half-shells have identical shapes which are the mirror image of each other, and are worked with mating edges 14, 15 which are then joined together.
  • the two half-shells can be assembled to each other using conventional clinching or welding steps. Once assembled, the two half-shells form a structure which is open, at the top along a straight side of the body 11' and at the bottom, to one end of the conduit 10' which forms the venturi inlet.
  • a U-shaped section member 13' which has multiple openings 12' quite similar to those in Figure 1.
  • the section member 13' is joined to the two half-shells through interlocking means consisting of opposed elevations 16 formed at the edges of the U-shaped section member 13', and corresponding grooves formed in the two half-shells.
  • the two half-shells can be formed from a single piece of sheet metal folded over at the apertured edge.
  • the venturi 10' connects to the box-type body 11' in a central area opposite the apertured side of the section member 13' and is slanted such that its axis forms with this side an acute angle whose apex locates close to one end of the section member, the right-hand end in Figure 3. Notice that the height of the body 11' is smaller than that of the prior art element.
  • the two half-shells are shaped, along a band-like region next to the open side mounting the U-shaped section member 13', with a depression 17 whose depth increases gradually fram left to right as viewed in Figure 3.
  • the two depressions 17 form a throat 20 of varying breadth inside the body 13', as shown best in Figures 6 and 7. Due to this throat of varying breadth, the air/gas mixture flowing from the venturi 10' will be resisted more in the direction toward the right-hand end of the U-shaped section member 13', where the velocity of the mixture flow is greatest, and meet no or just very small resistance in the left-hand region, where the mixture velocity is less.
  • the outgoing mixture flow rate is the same for all the openings, regardless of their location along the section member 13'.
  • the same effect is provided as would be obtained by making the element with a much taller body, which is obviously advantageous in terms of overall volume of the burner.
  • throat border lines indicated at 18 in Figure 7, follow a generally curvilinear pattern and are symmetrical about the centerline of the cross-section shown in Figure 7. It should be understood, however, that the actual pattern of the lines 18 could be other than that shown, to take account of a particular shape of the box-type body and the venturi, of the apertured area, and of other operational parameters of a specific application.
  • the venturi indicated at 10'', has here its axis substantially at right angles to the edge of the box-type body 11''.
  • said edge is also provided with a U-shaped section member 13'' quite similar to that of the previously described embodiment.
  • the depressions 17' are shaped to produce a throat (20') which is narrowest at the center of the U-shaped section member 13'', i.e. in the opposite area from the connection region of the conduit 10'' to the box-type body 11'', and then expands gradually in a symmetrical fashion to full breadth at the two ends of the section member.
  • venturi is offset slightly from the orthogonal direction to the mixture outflow edge, so that the throat would no longer be symmetrical about the center like that shown in Figure 9, but still comprised of a narrow portion which spreads out towards both ends of the section member 13''.
  • the throat next to the apertured edge could be provided by securing within the box-type body an insert shaped to fit, rather than by suitably shaping the walls of the body itself.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
EP94203004A 1993-11-10 1994-10-18 Elément mélangeur et diffuseur pour un brûleur atmosphérique Withdrawn EP0657691A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT93MI002394A IT1266802B1 (it) 1993-11-10 1993-11-10 Elemento miscelatore e diffusore per bruciatore atmosferico
ITMI932394 1993-11-10

Publications (1)

Publication Number Publication Date
EP0657691A1 true EP0657691A1 (fr) 1995-06-14

Family

ID=11367179

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94203004A Withdrawn EP0657691A1 (fr) 1993-11-10 1994-10-18 Elément mélangeur et diffuseur pour un brûleur atmosphérique

Country Status (2)

Country Link
EP (1) EP0657691A1 (fr)
IT (1) IT1266802B1 (fr)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0769656A1 (fr) * 1995-10-19 1997-04-23 E.L.M. Leblanc Perfectionnement apportés à un brûleur de chauffe-eau, chauffe-bain, chaudière à gaz
US5950573A (en) * 1998-10-16 1999-09-14 Srp 687 Pty. Ltd. Power vented water heater with air inlet
US6003477A (en) * 1995-04-04 1999-12-21 Srp 687 Pty. Ltd. Ignition inhibiting gas water heater
US6082310A (en) * 1995-04-04 2000-07-04 Srp 687 Pty. Ltd. Air inlets for water heaters
US6085700A (en) * 1998-08-21 2000-07-11 Srp 687 Pty Ltd. Heat sensitive air inlets for water heaters
US6116195A (en) * 1998-10-20 2000-09-12 Srp 687 Pty Ltd. Flame traps for water heaters
US6135061A (en) * 1995-04-04 2000-10-24 Srp 687 Pty Ltd. Air inlets for water heaters
US6138613A (en) * 1995-04-04 2000-10-31 Srp 687 Pty Ltd. Ignition inhibiting gas water heater
US6142106A (en) * 1998-08-21 2000-11-07 Srp 687 Pty Ltd. Air inlets for combustion chamber of water heater
US6155211A (en) * 1995-04-04 2000-12-05 Srp 687 Pty Ltd. Air inlets for water heaters
US6196164B1 (en) 1995-04-04 2001-03-06 Srp 687 Pty. Ltd. Ignition inhibiting gas water heater
US6269779B2 (en) 1998-08-21 2001-08-07 Srp 687 Pty Ltd. Sealed access assembly for water heaters
US6295951B1 (en) 1995-04-04 2001-10-02 Srp 687 Pty. Ltd. Ignition inhibiting gas water heater
US6302062B2 (en) 1998-08-21 2001-10-16 Srp 687 Pty Ltd. Sealed access assembly for water heaters
WO2002027237A1 (fr) * 2000-09-26 2002-04-04 Worgas Bruciatori S.R.L. Bruleur de faible bruit a lame modulaire
CN110513681A (zh) * 2018-05-22 2019-11-29 沃加斯布鲁恰托里有限责任公司 模块化燃烧器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1111556A (en) * 1966-03-22 1968-05-01 Roger Guerel Improved gas burner
FR2102802A6 (fr) * 1968-05-02 1972-04-07 Zaegel Held Sa
GB2031579A (en) * 1978-07-25 1980-04-23 Ti Domestic Appliances Ltd Improvements in or relating to gaseous fuel burners
FR2505454A3 (fr) * 1981-05-06 1982-11-12 Bosch Gmbh Robert Bruleur atmospherique tous gaz, notamment pour les appareils menagers chauffes au gaz
DE8613880U1 (de) * 1986-05-22 1986-07-03 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Gasbrenner
EP0606527A1 (fr) * 1993-01-15 1994-07-20 Enrico Sebastiani Appareil de combustion à gaz avec un brûleur atmosphérique et procédé de régulation de l'air dans l'appareil

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1111556A (en) * 1966-03-22 1968-05-01 Roger Guerel Improved gas burner
FR2102802A6 (fr) * 1968-05-02 1972-04-07 Zaegel Held Sa
GB2031579A (en) * 1978-07-25 1980-04-23 Ti Domestic Appliances Ltd Improvements in or relating to gaseous fuel burners
FR2505454A3 (fr) * 1981-05-06 1982-11-12 Bosch Gmbh Robert Bruleur atmospherique tous gaz, notamment pour les appareils menagers chauffes au gaz
DE8613880U1 (de) * 1986-05-22 1986-07-03 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Gasbrenner
EP0606527A1 (fr) * 1993-01-15 1994-07-20 Enrico Sebastiani Appareil de combustion à gaz avec un brûleur atmosphérique et procédé de régulation de l'air dans l'appareil

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6196164B1 (en) 1995-04-04 2001-03-06 Srp 687 Pty. Ltd. Ignition inhibiting gas water heater
US6418883B2 (en) 1995-04-04 2002-07-16 Srp 687 Pty. Ltd. Ignition inhibiting gas water heater
US6003477A (en) * 1995-04-04 1999-12-21 Srp 687 Pty. Ltd. Ignition inhibiting gas water heater
US6082310A (en) * 1995-04-04 2000-07-04 Srp 687 Pty. Ltd. Air inlets for water heaters
US6085699A (en) * 1995-04-04 2000-07-11 Srp 687 Pty Ltd. Air inlets for water heaters
US6401668B2 (en) 1995-04-04 2002-06-11 Srp 687 Pty. Ltd. Ignition inhibiting gas water heater
US6295951B1 (en) 1995-04-04 2001-10-02 Srp 687 Pty. Ltd. Ignition inhibiting gas water heater
US6135061A (en) * 1995-04-04 2000-10-24 Srp 687 Pty Ltd. Air inlets for water heaters
US6138613A (en) * 1995-04-04 2000-10-31 Srp 687 Pty Ltd. Ignition inhibiting gas water heater
US6155211A (en) * 1995-04-04 2000-12-05 Srp 687 Pty Ltd. Air inlets for water heaters
FR2740202A1 (fr) * 1995-10-19 1997-04-25 Leblanc Sa E L M Perfectionnements apportes a un bruleur de chauffe-eau, chauffe-bain, chaudiere a gaz
EP0769656A1 (fr) * 1995-10-19 1997-04-23 E.L.M. Leblanc Perfectionnement apportés à un brûleur de chauffe-eau, chauffe-bain, chaudière à gaz
US6142106A (en) * 1998-08-21 2000-11-07 Srp 687 Pty Ltd. Air inlets for combustion chamber of water heater
US6223697B1 (en) 1998-08-21 2001-05-01 Srp 687 Pty Ltd. Water heater with heat sensitive air inlet
US6269779B2 (en) 1998-08-21 2001-08-07 Srp 687 Pty Ltd. Sealed access assembly for water heaters
US6302062B2 (en) 1998-08-21 2001-10-16 Srp 687 Pty Ltd. Sealed access assembly for water heaters
US6085700A (en) * 1998-08-21 2000-07-11 Srp 687 Pty Ltd. Heat sensitive air inlets for water heaters
US5950573A (en) * 1998-10-16 1999-09-14 Srp 687 Pty. Ltd. Power vented water heater with air inlet
US6293230B1 (en) 1998-10-20 2001-09-25 Srp 687 Pty Ltd. Water heaters with flame traps
US6116195A (en) * 1998-10-20 2000-09-12 Srp 687 Pty Ltd. Flame traps for water heaters
WO2002027237A1 (fr) * 2000-09-26 2002-04-04 Worgas Bruciatori S.R.L. Bruleur de faible bruit a lame modulaire
US6960077B2 (en) 2000-09-26 2005-11-01 Worgas Bruciatori S.R.L. Low noise modular blade burner
CN110513681A (zh) * 2018-05-22 2019-11-29 沃加斯布鲁恰托里有限责任公司 模块化燃烧器

Also Published As

Publication number Publication date
IT1266802B1 (it) 1997-01-21
ITMI932394A0 (it) 1993-11-10
ITMI932394A1 (it) 1995-05-10

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