EP1840461A1 - Gasbrennerendkappe - Google Patents

Gasbrennerendkappe Download PDF

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Publication number
EP1840461A1
EP1840461A1 EP06251696A EP06251696A EP1840461A1 EP 1840461 A1 EP1840461 A1 EP 1840461A1 EP 06251696 A EP06251696 A EP 06251696A EP 06251696 A EP06251696 A EP 06251696A EP 1840461 A1 EP1840461 A1 EP 1840461A1
Authority
EP
European Patent Office
Prior art keywords
end cap
attachment region
circumferential attachment
circumferential
discontinuity
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Withdrawn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
EP06251696A
Other languages
English (en)
French (fr)
Inventor
Allan c/o Aeromatix Limited Whitaker
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 Ltd
Original Assignee
Aeromatix Ltd
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 Aeromatix Ltd filed Critical Aeromatix Ltd
Priority to EP06251696A priority Critical patent/EP1840461A1/de
Publication of EP1840461A1 publication Critical patent/EP1840461A1/de
Withdrawn legal-status Critical Current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
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/101—Flame diffusing means characterised by surface shape
    • F23D2203/1012—Flame diffusing means characterised by surface shape tubular
    • 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 an end cap for a gas burner, and particularly but not exclusively to an end cap for a gas burner for use in domestic heating appliances.
  • the gas burner may be of the 'premix' type, meaning that all of the air required for complete combustion is mixed with the fuel gas prior to combustion.
  • Conventional premix burners include a cylindrical burner wall defining an internal cavity for receiving a gas and air mixture, and the gas and air mixture passes through apertures in the cylindrical wall for combustion.
  • the gas and air mixture is fed into the internal cavity through an open end of the burner wall and the other end is closed using an end cap.
  • an end cap for use with a gas burner including a substantially cylindrical burner wall defining an internal cavity, the end cap being substantially circular and including a circumferential attachment region which is deformable to permit attachment of the end cap to one end of the cylindrical burner wall to close one end of the internal cavity, characterised in that the end cap includes a discontinuity in the circumferential attachment region.
  • the end cap may define a circumferential outer edge, and the circumferential attachment region may be generally annular and may extend in a radially inwards direction from the circumferential outer edge.
  • the discontinuity may extend across the circumferential attachment region, and may extend across the circumferential attachment region radially inwardly from the circumferential outer edge.
  • the discontinuity may extend radially inwardly across a portion of the annular circumferential attachment region.
  • the discontinuity may extend radially inwardly across between approximately 40% and 60% of the annular circumferential attachment region.
  • the discontinuity may extend radially inwardly across approximately 50% of the annular circumferential attachment region.
  • the discontinuity may be defined by the absence of material in the circumferential attachment region, and may be in the form of a slot or a notch.
  • the end cap may include a plurality of said discontinuities in the circumferential attachment region, and the discontinuities may be circumferentially spaced, possibly circumferentially equispaced, around the circumferential attachment region.
  • a gas burner including a substantially cylindrical burner wall defining an internal cavity and a substantially circular end cap including a circumferential attachment region, wherein the end cap is attached to one end of the burner wall via the circumferential attachment region to close one end of the internal cavity, characterised in that the end cap includes a discontinuity in the circumferential attachment region.
  • the end cap may be as defined above.
  • a heating appliance including a gas burner according to the second aspect of the present invention.
  • Fig. 1 illustrates a gas burner 10 located within a heating appliance including a combustion zone 12 and a heat exchanger 14.
  • the gas burner 10 is of a known design and is described here to facilitate understanding of the present invention, described later with reference to Figs. 2 to 5.
  • the gas burner 10 includes a cylindrical burner wall 16 and a concentric inner baffle 18, enclosing an internal cavity 20.
  • An end cap 22 of a known design is attached to one axial end of the burner wall 16 and closes one end of the internal cavity 20.
  • a mounting flange 24 is attached to the other axial end of the burner wall 16 and extends radially outwardly therefrom.
  • the gas burner 10 is attached to a housing 26 of the heating appliance via the mounting flange 24.
  • the burner wall 16 is provided with apertures in the form of flame ports 32, just a few of which are illustrated in Fig. 1.
  • the flame ports 32 are about 0.8mm in diameter and their centres are about 2 to 3mm apart.
  • the flame ports 32 may be arranged evenly over the whole of the burner wall 16.
  • the inner baffle 18 is provided with larger apertures 28.
  • a gas and air mixture is fed into the internal cavity 20 and passes through the apertures 28 in the baffle 18, through the flame ports 32 in the burner wall 16 and into the combustion zone 12 where combustion takes place.
  • the heat thereby produced is utilised via the heat exchanger 14, with the flue products passing out of the unit as indicated by the arrow A.
  • Figs. 2 and 3 illustrate an end cap 40 according to one embodiment of the invention.
  • the end cap 40 is intended for use with a gas burner, such as the gas burner 10 of Fig. 1, to replace the known end cap 22 illustrated in Fig. 1.
  • the end cap 40 is generally circular in plan and includes a central region 42 for closing one end of the internal cavity 20, a circumferential attachment region 44, located radially outwardly of the central region 42, and a connecting region 46 between the central region 42 and the circumferential attachment region 44.
  • the configuration of the end cap 40, and in particular the connecting region 46, is such that it allows the concentric inner baffle 18 to float inside the cylindrical burner wall 16, for example by moving axially and/or radially relative to the cylindrical burner wall 16.
  • the end cap defines a circumferential outer edge 48 and the circumferential attachment region 44, which is annular, extends radially inwardly away from the circumferential outer edge 48 and merges with the connecting region 46.
  • the end cap 40 In order to attach the end cap 40 to the burner wall 16, the end cap 40 is located at one of the axial ends of the burner wall 16 and the circumferential attachment region 44 is deformed, for example by a spinning operation, so that part of the circumferential attachment region 44 defines a securing lip 50 (see Figs. 4 and 5).
  • the securing lip 50 co-operates with a circumferentially extending securing formation 52 provided by the burner wall 16 to thereby securely attach the end cap 40 to the burner 10.
  • the end cap 40 includes a plurality of discontinuities 54 in the circumferential attachment region 44.
  • each of the discontinuities 54 is in the form of a slot 56, and these are circumferentially equispaced around the circumferential attachment region 44.
  • the slots 56 generally close up as a result of the deformation of the circumferential attachment region 44 which secures the end cap 40 to the burner wall 16.
  • opposing inner edges 56a thereof contact each other. This closure of the slots 56 ensures that there are no gaps between the end cap 40 and burner wall 16 and consequently no unwanted leakage of gas and air mixture from the internal cavity 20.
  • the width 'w' of the individual slots 56 needs to be carefully selected, and may vary according to the thickness of the material from which the end cap 40 is formed. Purely by way of example, for an end cap 40 including thirty slots 56 and having a material thickness of approximately 0.80mm, the width 'w' of each slot 56 may be between 1.10 and 1.30mm.
  • discontinuities 54 such as slots 56
  • the provision of discontinuities 54, such as slots 56, in the circumferential attachment region 44 is advantageous as it reduces the force required to deform the circumferential attachment region 44 and reduces the residual stresses in the end cap 40 after deformation. Minimisation of residual stresses induced as a result of the deformation process is advantageous as this reduces the likelihood of failure during thermal cycling of the burner 10 in use.
  • the discontinuities 54 also provide a reduction in the cyclic stresses in the end cap 40 as it expands and contracts between operating cycles.
  • each slot 56 extends in a radially inwards direction from the circumferential outer edge 48 of the end cap 40, partially across the circumferential attachment region 44. In the illustrated embodiment, each slot 56 extends across approximately 50% of the circumferential attachment region 44, radially inwardly from the circumferential outer edge 48. This is advantageous as it ensures that an adequate seal is formed between a continuous, uninterrupted, radially inner portion 43 of the circumferential attachment region 44 and the securing formation 52.
  • an end cap 40 for a gas burner 10 which can be readily attached to the burner 10 in a reliable manner.
  • the life of a burner 10 incorporating an end cap 40 according to the invention has been found to be significantly greater than the life of a burner 10 incorporating a conventional end cap, such as the end cap 22 illustrated in Fig. 1.
  • the discontinuities 54 may be of a form other than slots 56, and may have any suitable shape or configuration.
  • the discontinuities 54 may extend across the entirety of the circumferential attachment region 44 or may extend across only a portion thereof by any suitable amount, for example across between approximately 40% and approximately 60% of the circumferential attachment region 44, radially inwardly away from the circumferential outer edge 48.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
EP06251696A 2006-03-29 2006-03-29 Gasbrennerendkappe Withdrawn EP1840461A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06251696A EP1840461A1 (de) 2006-03-29 2006-03-29 Gasbrennerendkappe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06251696A EP1840461A1 (de) 2006-03-29 2006-03-29 Gasbrennerendkappe

Publications (1)

Publication Number Publication Date
EP1840461A1 true EP1840461A1 (de) 2007-10-03

Family

ID=36951499

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06251696A Withdrawn EP1840461A1 (de) 2006-03-29 2006-03-29 Gasbrennerendkappe

Country Status (1)

Country Link
EP (1) EP1840461A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3926236A3 (de) * 2020-06-16 2022-03-09 Beckett Thermal Solutions Portierter brenner

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57187511A (en) * 1981-05-14 1982-11-18 Akira Muramoto Gas burner for cooking utensils
GB2149904A (en) * 1983-11-17 1985-06-19 Aeromatic Co Ltd Duplex gas burner
EP0172945A1 (de) * 1984-08-24 1986-03-05 Furigas B.V. Gasbrenner
US4960378A (en) * 1987-09-26 1990-10-02 Ruhrgas Aktiengesellschaft Gas burner
US20050048429A1 (en) * 2003-01-27 2005-03-03 Sehmbi Jaswinder S. Premixed fuel burner assembly
EP1582810A2 (de) * 2004-03-29 2005-10-05 Rinnai Corporation Zylinderförmiger Brenner

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57187511A (en) * 1981-05-14 1982-11-18 Akira Muramoto Gas burner for cooking utensils
GB2149904A (en) * 1983-11-17 1985-06-19 Aeromatic Co Ltd Duplex gas burner
EP0172945A1 (de) * 1984-08-24 1986-03-05 Furigas B.V. Gasbrenner
US4960378A (en) * 1987-09-26 1990-10-02 Ruhrgas Aktiengesellschaft Gas burner
US20050048429A1 (en) * 2003-01-27 2005-03-03 Sehmbi Jaswinder S. Premixed fuel burner assembly
EP1582810A2 (de) * 2004-03-29 2005-10-05 Rinnai Corporation Zylinderförmiger Brenner

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 007, no. 037 (M - 193) 15 February 1983 (1983-02-15) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3926236A3 (de) * 2020-06-16 2022-03-09 Beckett Thermal Solutions Portierter brenner
EP4001758A1 (de) * 2020-06-16 2022-05-25 Beckett Thermal Solutions Brenner mit düsenöffnungen

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