EP1010940A2 - Gasbrenner - Google Patents

Gasbrenner Download PDF

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Publication number
EP1010940A2
EP1010940A2 EP99122916A EP99122916A EP1010940A2 EP 1010940 A2 EP1010940 A2 EP 1010940A2 EP 99122916 A EP99122916 A EP 99122916A EP 99122916 A EP99122916 A EP 99122916A EP 1010940 A2 EP1010940 A2 EP 1010940A2
Authority
EP
European Patent Office
Prior art keywords
combustion
burner
gas
sheet
chamber
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
EP99122916A
Other languages
English (en)
French (fr)
Other versions
EP1010940B1 (de
EP1010940A3 (de
Inventor
Graham c/o Bray Technologies PLC Wood
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.)
SIT-Bray Ltd
Original Assignee
BRAY TECHNOLOGIES PLC
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 BRAY TECHNOLOGIES PLC filed Critical BRAY TECHNOLOGIES PLC
Publication of EP1010940A2 publication Critical patent/EP1010940A2/de
Publication of EP1010940A3 publication Critical patent/EP1010940A3/de
Application granted granted Critical
Publication of EP1010940B1 publication Critical patent/EP1010940B1/de
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
    • F23D14/12—Radiant burners
    • F23D14/14—Radiant burners using screens or perforated plates
    • F23D14/145—Radiant burners using screens or perforated plates combustion being stabilised at a screen or a perforated plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/102—Flame diffusing means using perforated plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2212/00—Burner material specifications
    • F23D2212/20—Burner material specifications metallic

Definitions

  • the invention relates to a gas burner, and more specifically to a radiative heat gas burner of the type which are commonly incorporated in conventional gas cookers in the grills thereof.
  • the type of burners to which this invention relates are also known as atmospheric burners because combustion occurs on the surface of the burner with oxygen from the ambient atmosphere fuelling the combustion, but it to be understood that the invention may have wider application, in particular to premix burners in which air is mixed with assistance from a fan to a certain extent with the combustion gas prior to combustion thereof. In the interests of brevity however, the following description relates only to atmospheric burners.
  • Atmospheric burners are used to provide the grill in conventional gas cookers.
  • One configuration of burner typically consists of a plenum chamber fabricated by pressing a steel or aluminium sheet to form a cavity with an inlet port to which a gas feed tube is brazed, welded or otherwise connected.
  • a flow of combustion gas is introduced into the cavity from the feed tube from which it disperses within the cavity and flows substantially evenly beneath two perpendicularly disposed sheets of gauze and a punched hardened steel sheet superimposed on the gauze sheets on the surface of which combustion occurs.
  • the hardened steel sheet is provided with a plurality of holes through which the combustion gas passes, after first having passed through the gauze sheets from the cavity, the arrangement of holes being such that a substantially uniform flame distribution is achieved over the surface of the plate.
  • the holes in the hardened steel sheet may be of the order of 3cm in diameter.
  • the cavity is sealed both at the connection of the feed tube with the inlet port, and also around the periphery of the plate and the sheets of gauze by folding an edge of the steel pressing over the edges of the plate and sheets of gauze.
  • the steel sheet is generally provided with at least one indentation to interrupt its otherwise substantially planar profile.
  • the indentations are provided to mitigate against the buckling effects of the sheet during the expansion thereof experienced as combustion occurs on its surface.
  • Such buckling effects result from the method by which the seal around the edge of the plate is effected in that the folding of an edge of the steel pressing around the entire periphery of the plate prevents the expansion of the said plate.
  • the sheet may be spot welded a portion of the pressing proximate the centre thereof to prevent its outward bulging during combustion which adversely affects the flame profile on the surface of said plate.
  • the fundamental disadvantage of the burner construction described is one of cost.
  • the particular components which constitute the burner are chosen to achieve a substantially uniform flame profile over the surface of the hardened steel plate, both to ensure that food products being cooked underneath the burner are not singed or burned, and to ensure that the gauze portions revealed by the holes glow with a dull, reddish colour.
  • the glowing of the gauze portions has previously been considered essential to provide radiative heat transfer from the burner to the food and thus effective cooking thereof, the conventional disposition of the burner above the food during grilling thereof precluding convective heat transfer and the low thermal conductivity of air precluding conductive heat transfer.
  • a "poker" type burner which comprises a cylindrical tube mounted substantially centrally of the burner from which the combustion gas flows through apertures arranged linearly along the length of the tube and on both sides thereof. Disposed above the line of apertures are provided a pair of fins angled towards each other and provided with a series of indentations over the surface. In use, combustion occurs on the lower surface of the fins with the indentations glowing and thus radiating heat downwardly onto a food product beneath the burner.
  • a burner head having an inlet port by which the burner is provided with a combustible gas, a chamber in which the combustion gas flows prior to combustion, and a combustion surface through which the gas passes from the chamber to combust thereon or proximate thereto, characterised in that the combustion surface is provided with a pattern of perforations, the total area of perforation as compared to the area of the combustion surface being sufficient to permit a sufficient quantity of gas to flow therethrough, and each perforation being of size which prevents any burn back within the chamber.
  • the combustion surface is preferably formed from a sheet of stainless steel.
  • the pattern of perforations within the sheet creates a substantially uniform flame profile on or proximate the surface thereof.
  • the combustion surface is provided with indentations to prevent significant buckling of the said surface during combustion thereon.
  • baffle means are provided internally of the chamber to ensure substantially even distribution of the combustion gas within the chamber and underneath the combustion surface.
  • the burner head is incorporated in a conventional gas cooker and provides a grill function therefor.
  • the burner head is preferably disposed with its combustion surface facing downwardly above a tray on which food products to be cooked are placed.
  • the combustion surface is provided with means for generating a spark to ignite the combustion gas.
  • the sparking means is affixed through the combustion surface, an indentation being provided on said combustion surface which acts as the sparking contact against which the spark discharges.
  • FIG. 1 there is shown a burner head 2 of prior art configuration comprising a gas feed tube 4 which passes into a chamber 6 disposed underneath a combustion surface indicated generally by reference numeral 8. It should be pointed out that the burner heads shown in both Figures 1 and 2 are conventionally rotated through 180° about the axis of the feed tube so that the combustion surface faces downwardly and the combustion which occurs thereon provides a grilling effect on products beneath the said burner head.
  • the combustion surface 8 is comprised of a punched template 10 which overlays two separate sheets of gauze arranged perpendicularly to one another to create a sufficient resistance to the flow of gas from within the chamber 6 through said sheets of gauze in the regions of apertures 12 provided in the punched template 10.
  • the template 10 is provided with an indentation 14 which is spot welded at 16 to a suitable projection within the chamber 6, and this connection between these two components serves to mitigate against the effects of buckling of the template 10 as it expands while combustion is occurring on or proximate the combustion surface 8.
  • FIG. 2 there is shown a burner 20 provided with a gas feed tube 22 entering a chamber 24 disposed underneath a combustion surface indicated generally by reference numeral 26.
  • the combustion surface 26 is comprised of a single sheet 28 of stainless steel which is sealed to the chamber 24 around its periphery by means of folded edge portions 30 which are integrally formed with the chamber 24.
  • Gas entering the chamber 24 through the feed tube 22 strikes a baffle (not shown) mounted at a suitable distance from the end of the feed tube 22 within the chamber 24, and is thus distributed substantially evenly within the said chamber and underneath the mettle sheet 28.
  • the chamber 24 communicates directly with the perforations, indicated generally by 32, and therefore gas entering the chamber 24 is allowed to flow without obstruction or having firstly to flow through any additional component through the perforations 32.
  • a number of indentations 34, 36, 38 are provided in the surface of the metal sheet 28 for the same reasons as mentioned above with regard to the indentation 14 of the burner head of Figure 1.
  • the sheet 28 is provided with a further indentation 40 which protrudes outwardly from the surface of the sheet 28, and additionally with a sparking device mounting aperture 42 which is punched through both the chamber 24 and the sheet 28 approximate an edge and/or a corner thereof.
  • the aperture 42 may be punched through the sheet 28 and the chamber 24 in an area where these two components have been previously sealed, for example, approximate the folded edge portions 30, and in this event a separate sealing operation after the punching operation of aperture 42 is not required.
  • a suitable sparking means such as a piezo electric sparking device may thus be mounted through the aperture 42 and suitably positioned with respect to the indentation 40 which acts as a contact against which the sparking means is triggered.
  • FIG 3 there is shown an enlarged portion of the surface of the metal sheet 28 which clearly demonstrates the arrangement of the perforation within the said sheet. It can be seen from Figure 3 that the pattern 44 of perforations is symmetrical about a longitudinal axis 46 and a longitudinal axis 48, both axis being described with reference to the particular direction of perforation.
  • the perforations are of insufficient size to permit rapid escape of gas from within the chamber 24, but a sufficient number of perforations is provided such that a distributed and uniform flame profile can be achieved on or proximate the combustion surface 26 of the burner head 20.
  • the burner of figure 2 performs equally as well as the burner of Figure 1 as regards the radiation of heat from its combustion surface 26 to and through a food product disposed beneath same. It is believed that although none of the components shown in Figure 2 glows with a visible intensity, the metal sheet 28 nevertheless radiates a sufficient amount of heat to cook products disposed beneath the said combustion surface 26.
  • the surface of metal sheet 28 is provided with a plurality of defined rows 46A, 48A of perforations which intersect substantially perpendicular to one another, such as those perforations which are provided collinearly with axes 46, 48.
  • rows 46B, 46C, 46B', 46C', 48B, 48B' of perforations are provided on either side of these intersecting rows 46A, 48A and parallel therewith to increase the overall perforation area in the surface of sheet 28, and also to effectively broaden the intersecting rows 46A, 48A.
  • rows 46B, 46B' and 48B, 48B' are incomplete because every fourth perforation in rows 46B, 46B' and 48B, 48B' is removed, whereas only every fourth perforation is provided in rows 46C, 46C'.
  • This arrangement of perforations provides a patterned effect over the surface of sheet 28, but in rows.
  • the patterned effect provides a means by which burner resonance can be reduced during operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Baking, Grill, Roasting (AREA)
  • Glass Compositions (AREA)
  • Gas Separation By Absorption (AREA)
EP99122916A 1998-12-16 1999-11-18 Gasbrenner Expired - Lifetime EP1010940B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9827620 1998-12-16
GBGB9827620.7A GB9827620D0 (en) 1998-12-16 1998-12-16 Gas burner

Publications (3)

Publication Number Publication Date
EP1010940A2 true EP1010940A2 (de) 2000-06-21
EP1010940A3 EP1010940A3 (de) 2001-03-07
EP1010940B1 EP1010940B1 (de) 2004-07-07

Family

ID=10844274

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99122916A Expired - Lifetime EP1010940B1 (de) 1998-12-16 1999-11-18 Gasbrenner

Country Status (5)

Country Link
US (1) US20010036610A1 (de)
EP (1) EP1010940B1 (de)
AT (1) ATE270760T1 (de)
DE (1) DE69918517D1 (de)
GB (1) GB9827620D0 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2186293C2 (ru) * 2000-10-24 2002-07-27 Гулицкий Константин Эдуардович Газовая горелка инфракрасного излучения
US6843649B2 (en) 2002-05-25 2005-01-18 Bray Burners Limited Burner

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3687098B2 (ja) * 2002-12-11 2005-08-24 株式会社ノーリツ 燃焼管及びこの燃焼管を備えたガス燃焼機器
EP1776028B1 (de) * 2004-06-23 2008-10-08 Willie H. Best Infrarot emittierende vorrichtung
ATE487408T1 (de) * 2006-09-26 2010-11-15 Char Broil Llc Garvorrichtung mit konkavem strahler
EP2084460B1 (de) * 2006-11-10 2011-10-26 Char-Broil, LLC Strahlrohrbratrost
CA2744808C (en) * 2008-12-01 2016-08-30 Willie H. Best Methods and apparatus for generating infrared radiation from convective products of combustion
EP2449317A1 (de) * 2009-06-29 2012-05-09 W.C. Bradley Co. Strahlungskochvorrichtung mit einzelöffnung
TWI570362B (zh) 2010-12-20 2017-02-11 索拉羅尼克斯股份有限公司 具有浮凸屏之氣體加熱輻射發射體
WO2014078132A2 (en) 2012-11-15 2014-05-22 W.C. Bradley Co. Electric roaster and smoker
GB2509492A (en) * 2012-12-19 2014-07-09 Worgas Burners Ltd A gas burner having a combustion surface formed by a sheet with plural apertures
US9668613B2 (en) 2013-06-17 2017-06-06 W.C. Bradley Co. High efficiency apparatus and method for cooking, heating and drying
CN105451567B (zh) 2013-06-17 2021-08-03 W.C.布拉德利公司 户外炊具和烟熏器及用于其的燃料燃烧器
US9709281B2 (en) 2014-03-31 2017-07-18 W.C. Bradley Co. High efficiency side burner and outdoor cooker
CA2977120C (en) 2015-03-25 2023-02-21 William A. Dixon Vertical electric cooker and smoker and smoke box
US10088153B2 (en) * 2015-12-29 2018-10-02 Clearsign Combustion Corporation Radiant wall burner including perforated flame holders
EP3856447A1 (de) * 2018-10-17 2021-08-04 Beckett Thermal Solutions Ltd. Verfahren zur herstellung einer gasbrennermembran

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1387132A (fr) * 1962-12-11 1965-01-29 Hupp Corp Perfectionnement au chauffage par rayonnement infra-rouge
FR1449685A (fr) * 1965-05-07 1966-05-06 élément rayonnant pour brûleur à gaz
US5046944A (en) * 1979-11-16 1991-09-10 Smith Thomas M Infra-red generation
FR2589555B1 (fr) * 1985-11-06 1989-11-10 Gaz De France Bruleur a gaz a air souffle
FR2642821A1 (fr) * 1989-02-07 1990-08-10 Etu Realisa Equip Materie Cent Radiant infra-rouge a gaz avec pre-chambre de diffusion et thermocouple a fusible haute temperature
DE3926699A1 (de) * 1989-08-12 1991-02-14 Kloeckner Waermetechnik Gasbrenner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2186293C2 (ru) * 2000-10-24 2002-07-27 Гулицкий Константин Эдуардович Газовая горелка инфракрасного излучения
US6843649B2 (en) 2002-05-25 2005-01-18 Bray Burners Limited Burner

Also Published As

Publication number Publication date
US20010036610A1 (en) 2001-11-01
EP1010940B1 (de) 2004-07-07
ATE270760T1 (de) 2004-07-15
DE69918517D1 (de) 2004-08-12
EP1010940A3 (de) 2001-03-07
GB9827620D0 (en) 1999-02-10

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