EP2759768A1 - Gas burner - Google Patents
Gas burner Download PDFInfo
- Publication number
- EP2759768A1 EP2759768A1 EP14275014.0A EP14275014A EP2759768A1 EP 2759768 A1 EP2759768 A1 EP 2759768A1 EP 14275014 A EP14275014 A EP 14275014A EP 2759768 A1 EP2759768 A1 EP 2759768A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas burner
- flame strip
- distributor
- burner according
- flame
- 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- Withdrawn
Links
Images
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
- F23D14/06—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 radial outlets at the 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
- F23D14/12—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
- 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
- F23D14/02—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
- F23D14/105—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 with injector axis parallel to the burner head axis
-
- 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
- F23D14/48—Nozzles
- F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
- F23D14/583—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration of elongated shape, e.g. slits
- F23D14/586—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration of elongated shape, e.g. slits formed by a set of sheets, strips, ribbons or the like
-
- 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
- F23D2203/00—Gaseous fuel burners
- F23D2203/10—Flame diffusing means
- F23D2203/102—Flame diffusing means using perforated plates
Definitions
- This invention relates to a gas burner, and particularly but not exclusively to a gas burner for use in domestic heating appliances.
- the burner may be of the "premix" type, meaning that all the air required for combustion is mixed with a fuel gas prior to burning.
- This invention relates to burners of the type which include a cavity for receiving a gas and air mixture, a cylindrical distributor surrounding the cavity with relatively large through holes therein.
- a cylindrical flame strip surrounds the distributor, with a plurality of relatively small through holes therein defining flame ports through which the gas and air mixture may pass immediately prior to combustion.
- a restrictor tube which is a tube of a smaller diameter which extends coaxially within the distributor for part of the length thereof.
- Restrictor tubes can help to alleviate noise in gas burners.
- a gas burner including an internal cavity for receiving a gas and air mixture, a distributor in the form of a cylindrical wall surrounding the cavity with a plurality of through holes in the wall, a flame strip in the form of a cylindrical wall coaxially surrounding the distributor, with a plurality of through holes in the wall of the flame strip, an external mounting flange being provided at one end of the cavity, the mounting flange being formed by the walls of the flame strip being turned outwardly at said one end to form an annular flange, with the distributor and flame strip being joined together at said one end of the cavity at a plurality of discrete locations spaced around the cavity, with a gap being provided between the distributor and flame strip at said one end other than at the discrete locations.
- a tab may be provided at each discrete location on the distributor.
- Each tab may include a part which extends at least generally parallel to the flame strip and can be mounted thereto.
- the tabs are mounted to the flame strip by welding.
- the tabs are mounted to the flame strip by interengaging formations on the tabs and flame strip.
- the interengaging formations may include an opening in a one of the tabs and flame strip, and a projection on the other of the tabs and flame strip, which projection once passed through an opening cannot be passed back thereoutof.
- the discrete locations may be equispaced around the distributor. In one embodiment four discrete locations are provided.
- the burner may also include a restrictor tube in the form of a cylindrical wall coaxially located in the distributor and extending for part of the length thereof from said one end.
- the burner may also include an end cap at the other end thereof, which end cap closes the flame strip and distributor.
- the end cap may be mounted on the other end of the flame strip by folding part of the end cap over the end of the flame strip.
- the distributor and/or flame strip may be formed from shaped sheet metal, and a mechanical join may be provided between ends of the sheet material to form the cylindrical shape.
- Fig. 1 shows by way of illustration a gas burner 10 located within a heating appliance including a combustion zone 12 and heat exchanger 14.
- the gas burner 10 includes a cylindrical flame strip 16 with a concentric inner distributor 18, enclosing an internal cavity 20.
- An end cap 22 is attached to the flame strip 16 and closes one axial end of the gas burner 10.
- a mounting flange 24 is attached to the other axial end of the flame strip 16 and extends radially outwardly therefrom.
- the gas burner 10 is attached to a housing 26 via the mounting flange 24.
- the flame strip is provided with through holes in the form of flame ports 32, just a few of which are shown in Fig. 1 .
- the flame ports are about 1 mm in diameter, and their centres are about 2 - 3mm apart.
- the flame ports 32 are arranged evenly over the flame strip 16.
- the distributor 18 is provided with a regular pattern of larger through holes 28.
- a gas and air mixture is passed into the cavity 20 and passes through the holes 28 in the distributor 20, and out through the flame ports 32 and into the combustion zone 12 where burning 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 to 4 show a gas burner 40 according to the invention.
- the burner 40 comprises a flame strip 42, with a distributor 44 located therein.
- a mounting flange 46 is provided at one end of the burner 40, with an end cap 48 at the opposite end.
- the flame strip 42 comprises a cylindrical wall 50 with a plurality of openings therethrough which form flame parts, but are not shown in the drawings.
- the openings, flame ports, in the flame strip 42 may be in a uniform pattern, or could for instance vary along the length of the flame strip 42.
- the openings may be circular and/or in the form of slots.
- the flame strip 42 may be made from a strip of material, and a mechanical joint 52 may be provided at each end of the strip to enable the strip to be formed into the cylinder shown.
- the mechanical formation may be in the form of a plurality of tabs axially spaced alternately on each end which overlap respectively inside and outside of the cylinder to hold the flame strip in its configuration.
- the distributor 44 is also of cylindrical form with through holes 54 formed in a cylindrical wall 56.
- the distributor 44 may be formed in a similar fashion to the flame strip 42 from a sheet of metal, with a mechanical fastening to retain the distributor 44 in a cylindrical configuration.
- the mounting flange 46 is provided by the cylindrical wall 50 of the flame strip being turned outwardly at the one end to form the integral mounting flange 46.
- the distributor 44 extends to a short distance from the one end of the flame strip 42 where the mounting flange 46 is provided.
- a small outwardly turned flange 58 is provided round the one end of the distributor 44.
- Four equispaced tab members 60 extend from the flange 58 spaced from each other, with a gap between each tab member 60 of significantly greater extent than the width of each tab member 60.
- Each tab member 60 comprises a first part 62 extending outwardly from the flange 58 turning in to a second tab part 64 extending parallel to and adjacent part of the inner side of the flame strip cylindrical wall 50.
- Each of the tab parts 64 is mounted to the inner side of the cylindrical wall 50. In this instance the tab parts 64 are mounted to the wall 50 by spot welding.
- mounting portions may be provided on the tab 64 and wall 50, and these may comprise a projection on a one of the tab parts 64 or wall 50 extendable through an opening in the other, with the projection being such that it cannot pass back through the opening. It may be that the projection can be deformed to pass through the opening, or after passing through the opening so as to prevent withdrawal of the projection through the opening.
- the flame strip 42 and distributor 44 can be mounted together readily by welding and particularly spot welding, or by a mechanical mounting as outlined above. Only requiring three components provides for a cost saving relative to previous more complicated arrangements.
- the gap between the lower end of the distributor and the flame strip provides a bypass and helps to avoid noise during burning.
Abstract
A gas burner 40 with a flame strip 42 and a distributor 44 located therein. A mounting flange 46 is provided at one end of the burner 40, and is formed by the walls of the flame strip 42 being turned outwardly.
Description
- This invention relates to a gas burner, and particularly but not exclusively to a gas burner for use in domestic heating appliances.
- The burner may be of the "premix" type, meaning that all the air required for combustion is mixed with a fuel gas prior to burning.
- This invention relates to burners of the type which include a cavity for receiving a gas and air mixture, a cylindrical distributor surrounding the cavity with relatively large through holes therein. A cylindrical flame strip surrounds the distributor, with a plurality of relatively small through holes therein defining flame ports through which the gas and air mixture may pass immediately prior to combustion.
- In some instances it is required to provide a restrictor tube which is a tube of a smaller diameter which extends coaxially within the distributor for part of the length thereof. Restrictor tubes can help to alleviate noise in gas burners.
- According to one aspect of the present invention there is provided a gas burner, the gas burner including an internal cavity for receiving a gas and air mixture, a distributor in the form of a cylindrical wall surrounding the cavity with a plurality of through holes in the wall, a flame strip in the form of a cylindrical wall coaxially surrounding the distributor, with a plurality of through holes in the wall of the flame strip, an external mounting flange being provided at one end of the cavity, the mounting flange being formed by the walls of the flame strip being turned outwardly at said one end to form an annular flange, with the distributor and flame strip being joined together at said one end of the cavity at a plurality of discrete locations spaced around the cavity, with a gap being provided between the distributor and flame strip at said one end other than at the discrete locations.
- A tab may be provided at each discrete location on the distributor. Each tab may include a part which extends at least generally parallel to the flame strip and can be mounted thereto.
- In one embodiment the tabs are mounted to the flame strip by welding.
- In other embodiments the tabs are mounted to the flame strip by interengaging formations on the tabs and flame strip. The interengaging formations may include an opening in a one of the tabs and flame strip, and a projection on the other of the tabs and flame strip, which projection once passed through an opening cannot be passed back thereoutof.
- The discrete locations may be equispaced around the distributor. In one embodiment four discrete locations are provided.
- The burner may also include a restrictor tube in the form of a cylindrical wall coaxially located in the distributor and extending for part of the length thereof from said one end.
- The burner may also include an end cap at the other end thereof, which end cap closes the flame strip and distributor. The end cap may be mounted on the other end of the flame strip by folding part of the end cap over the end of the flame strip.
- The distributor and/or flame strip may be formed from shaped sheet metal, and a mechanical join may be provided between ends of the sheet material to form the cylindrical shape.
- An embodiment of the present invention will now be described by way of example only with reference to the accompanying drawings, in which:-
-
Fig. 1 is a diagrammatic perspective view of a conventional burner in place within an appliance; -
Fig. 2 is a diagrammatic partially cut away perspective end view of a burner according to the inventions; -
Fig. 3 is a diagrammatic perspective cut away view of part of the burner ofFig. 2 ; and -
Fig. 4 is a diagrammatic cut away side view of part of the burner ofFig. 2 ; -
Fig. 1 shows by way of illustration agas burner 10 located within a heating appliance including acombustion zone 12 andheat exchanger 14. Thegas burner 10 includes acylindrical flame strip 16 with a concentricinner distributor 18, enclosing aninternal cavity 20. Anend cap 22 is attached to theflame strip 16 and closes one axial end of thegas burner 10. Amounting flange 24 is attached to the other axial end of theflame strip 16 and extends radially outwardly therefrom. Thegas burner 10 is attached to ahousing 26 via themounting flange 24. - The flame strip is provided with through holes in the form of
flame ports 32, just a few of which are shown inFig. 1 . The flame ports are about 1 mm in diameter, and their centres are about 2 - 3mm apart. Theflame ports 32 are arranged evenly over theflame strip 16. Thedistributor 18 is provided with a regular pattern of larger throughholes 28. - In use, a gas and air mixture is passed into the
cavity 20 and passes through theholes 28 in thedistributor 20, and out through theflame ports 32 and into thecombustion zone 12 where burning takes place. The heat thereby produced is utilised via theheat exchanger 14, with the flue products passing out of the unit as indicated by the arrow A. -
Figs. 2 to 4 show agas burner 40 according to the invention. Theburner 40 comprises aflame strip 42, with adistributor 44 located therein. Amounting flange 46 is provided at one end of theburner 40, with anend cap 48 at the opposite end. - The
flame strip 42 comprises acylindrical wall 50 with a plurality of openings therethrough which form flame parts, but are not shown in the drawings. The openings, flame ports, in theflame strip 42 may be in a uniform pattern, or could for instance vary along the length of theflame strip 42. The openings may be circular and/or in the form of slots. - The
flame strip 42 may be made from a strip of material, and amechanical joint 52 may be provided at each end of the strip to enable the strip to be formed into the cylinder shown. The mechanical formation may be in the form of a plurality of tabs axially spaced alternately on each end which overlap respectively inside and outside of the cylinder to hold the flame strip in its configuration. - The
distributor 44 is also of cylindrical form with throughholes 54 formed in acylindrical wall 56. Thedistributor 44 may be formed in a similar fashion to theflame strip 42 from a sheet of metal, with a mechanical fastening to retain thedistributor 44 in a cylindrical configuration. - The
mounting flange 46 is provided by thecylindrical wall 50 of the flame strip being turned outwardly at the one end to form theintegral mounting flange 46. - The
distributor 44 extends to a short distance from the one end of theflame strip 42 where themounting flange 46 is provided. A small outwardly turnedflange 58 is provided round the one end of thedistributor 44. Fourequispaced tab members 60 extend from theflange 58 spaced from each other, with a gap between eachtab member 60 of significantly greater extent than the width of eachtab member 60. - Each
tab member 60 comprises afirst part 62 extending outwardly from theflange 58 turning in to asecond tab part 64 extending parallel to and adjacent part of the inner side of the flame stripcylindrical wall 50. Each of thetab parts 64 is mounted to the inner side of thecylindrical wall 50. In this instance thetab parts 64 are mounted to thewall 50 by spot welding. - Other types of mounting can however be used. For instance mounting portions may be provided on the
tab 64 andwall 50, and these may comprise a projection on a one of thetab parts 64 orwall 50 extendable through an opening in the other, with the projection being such that it cannot pass back through the opening. It may be that the projection can be deformed to pass through the opening, or after passing through the opening so as to prevent withdrawal of the projection through the opening. - It is to be realised that there is therefore provided a gap between the one end of the
distributor 44 and the flame stripcylindrical wall 50, except where thetab members 60 are provided. - This therefore provides a gas burner which only requires three components, namely the
flame strip 42,distributor 44, andend cap 48. Theflame strip 42 anddistributor 44 can be mounted together readily by welding and particularly spot welding, or by a mechanical mounting as outlined above. Only requiring three components provides for a cost saving relative to previous more complicated arrangements. The gap between the lower end of the distributor and the flame strip provides a bypass and helps to avoid noise during burning. - Various other modifications may be made without departing from the scope of the invention. As indicated different mounting techniques or formations could be used. A different number and/or spacing of tabs could be provided around the distributor.
- Whilst endeavouring in the foregoing specification to draw attention to those features of the invention believed to be of particular importance it should be understood that the Applicant claims protection in respect of any patentable feature or combination of features hereinbefore referred to and/or shown in the drawings whether or not particular emphasis has been placed thereon.
Claims (13)
- A gas burner, the gas burner including an internal cavity for receiving a gas and air mixture, a distributor in the form of a cylindrical wall surrounding the cavity with a plurality of through holes in the wall, a flame strip in the form of a cylindrical wall coaxially surrounding the distributor, with a plurality of through holes in the wall of the flame strip, an external mounting flange being provided at one end of the cavity, the mounting flange being formed by the walls of the flame strip being turned outwardly at said one end to form an annular flange, with the distributor and flame strip being joined together at said one end of the cavity at a plurality of discrete locations spaced around the cavity, with a gap being provided between the distributor and flame strip at said one end other than at the discrete locations.
- A gas burner according to claim 1, in which a tab is provided at each discrete location on the distributor.
- A gas burner according to claim 2, in which each tab includes a part which extends at least generally parallel to the flame strip and can be mounted thereto.
- A gas burner according to claims 2 or 3, in which the tabs are mounted to the flame strip by welding.
- A gas burner according to claims 2 or 3, in which the tabs are mounted to the flame strip by interengaging formations on the tabs and flame strip.
- A gas burner according to claim 5, in which the interengaging formations include an opening in a one of the tabs and flame strip, and a projection on the other of the tabs and flame strip, which projection once passed through an opening cannot be passed back thereoutof.
- A gas burner according to any of the preceding claims, in which the discrete locations are equispaced around the distributor.
- A gas burner according to any of the preceding claims, in which four discrete locations are provided.
- A gas burner according to any of the preceding claims, in which the burner also includes a restrictor tube in the form of a cylindrical wall coaxially located in the distributor and extending for part of the length thereof from said one end.
- A gas burner according to any of the preceding claims, in which the burner also includes an end cap at the other end thereof, which end cap closes the flame strip and distributor.
- A gas burner according to claim 10, in which the end cap is mounted on the other end of the flame strip by folding part of the end cap over the end of the flame strip.
- A gas burner according to any of the preceding claims, in which the distributor and/or flame strip are formed from shaped sheet metal.
- A gas burner according to claim 12, in which a mechanical join is provided between ends of the sheet material to form the cylindrical shape.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB201301463A GB2510173A (en) | 2013-01-28 | 2013-01-28 | Reduced noise burner |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2759768A1 true EP2759768A1 (en) | 2014-07-30 |
Family
ID=47890877
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14275014.0A Withdrawn EP2759768A1 (en) | 2013-01-28 | 2014-01-22 | Gas burner |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2759768A1 (en) |
GB (1) | GB2510173A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106989394A (en) * | 2017-05-23 | 2017-07-28 | 华帝股份有限公司 | Combined fire cover of burner |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1431657A1 (en) * | 2002-12-21 | 2004-06-23 | Aeromatix Limited | Gas Burner |
WO2004104477A1 (en) * | 2003-05-23 | 2004-12-02 | Worgas - Bruciatori - S.R.L. | Adjustable burner |
EP1840460A1 (en) * | 2006-03-29 | 2007-10-03 | Aeromatix Limited | Gas burner |
US20120196237A1 (en) * | 2011-01-31 | 2012-08-02 | Clint Murray | Cylindrical burner and method for making the same |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2503265A (en) * | 2012-06-21 | 2013-12-25 | Worgas Burners Ltd | Flanged gas burner assembly |
-
2013
- 2013-01-28 GB GB201301463A patent/GB2510173A/en not_active Withdrawn
-
2014
- 2014-01-22 EP EP14275014.0A patent/EP2759768A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1431657A1 (en) * | 2002-12-21 | 2004-06-23 | Aeromatix Limited | Gas Burner |
WO2004104477A1 (en) * | 2003-05-23 | 2004-12-02 | Worgas - Bruciatori - S.R.L. | Adjustable burner |
EP1840460A1 (en) * | 2006-03-29 | 2007-10-03 | Aeromatix Limited | Gas burner |
US20120196237A1 (en) * | 2011-01-31 | 2012-08-02 | Clint Murray | Cylindrical burner and method for making the same |
Also Published As
Publication number | Publication date |
---|---|
GB201301463D0 (en) | 2013-03-13 |
GB2510173A (en) | 2014-07-30 |
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