EP1531304B1 - Triple crown gas burner for cooking hobs - Google Patents
Triple crown gas burner for cooking hobs Download PDFInfo
- Publication number
- EP1531304B1 EP1531304B1 EP04380216A EP04380216A EP1531304B1 EP 1531304 B1 EP1531304 B1 EP 1531304B1 EP 04380216 A EP04380216 A EP 04380216A EP 04380216 A EP04380216 A EP 04380216A EP 1531304 B1 EP1531304 B1 EP 1531304B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- central
- radial
- chamber
- mixture
- burner
- 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.)
- Not-in-force
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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
- F23D14/06—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
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/14—Special features of gas burners
- F23D2900/14062—Special features of gas burners for cooking ranges having multiple flame rings
Definitions
- the present invention relates to a gas burner construction for a cooking hob, provided with three flame crowns and the outlets arranged radially in the burner body.
- Gas burners for cooking hobs provided with two flame crowns arranged peripherally in the body of the burner, on either side of an annular chamber for the distribution of the gas-air mixture, and with a third central flame crown disposed around a circular central chamber, are already known.
- the gas-primary air fuel mixture is produced in a bowl-shaped base provided with the gas injector, which is fixed below the cooking hob tray.
- the burner body is mounted above the hob for the intake of the primary air from the separating space between the hob tray and the burner body.
- the problem to be resolved in a burner of this three flame-crown type, incorporating a central gas-air mixture distribution chamber, is supplying to the central flame crown from a common delivery flow diffused downstream from the central tubular duct and that the portion of branched flow towards the central chamber arrives with a homogeneous gas-air mixture, in order to achieve an efficient combustion at the central crown as well.
- the known solutions to the problem posed of supplying the central crown include either branching a portion of the common mixture flow directly from the central tubular duct output, or branching thereof from the radial diffusion ducts.
- EP-1025392-A discloses a gas burner of this type, wherein the delivery of gas-air mixture corresponding to the central chamber, is supplied by way of access openings in the bottom of the central chamber, situated directly above the vertical central duct.
- This solution requires the construction of a concave wall on this chamber bottom separated from the tubular duct, with the drawback that a therefore combustion is deficient because the mixture does not have a long enough diffusion running to become homogeneous.
- WO-03/036168-A the supply of the gas-air mixture to the central distribution chamber is resolved by means of a branching opening on each of said horizontal radial diffusion ducts as they pass below the outline of the central chamber.
- the gas-air mixture flow supplying the central chamber has however run along a horizontal diffusion path, which is not long enough to turn the gas-air flow at the flame holes into an homogeneous mixture.
- the object of the invention is a gas burner for a cooking hob of the type with a circular burner body with three flame crowns of radial outlets, of which two are peripheral crowns around a peripheral annular distribution chamber and the third a central crown around a central chamber, the gas-air mixture being led to both distribution chambers from a vertical mixture intake duct and diffused downstream by way of various horizontal "venturi" ducts, which are extended in a radial direction below the distribution chambers, wherein said radial diffusion ducts are provided with branch channels for supplying the central chamber with a homogenized portion of the mixture flow.
- the gas burner according to the present invention is provided with means to divide the mixture flow downstream from said horizontal radial ducts into two portions of flow discharging into the respective peripheral or central annular chamber, the flow portion ducted to the central chamber being composed of a homogenized mixture of gas and air.
- the invention provides a channel for branching a portion of the mixture flow for the particular supply of the central chamber.
- the branch channel is constructed on each of the common mixture flow radial ducts and has a ducting section sized proportionally to the power of the central crown.
- gas burner 1 comprises the following burner parts:
- the mixer bowl-base 10 takes in the primary air A1 from an opening above the cooking tray 14.
- the circular venturi body 9 is connected by its periphery to the burner body, whereby the walls of the latter close above the radial diffusion ducts 9b.
- the surface of the burner body 2 has various secondary air intake openings between both peripheral crowns 3,4.
- the whole flow of mixture M is led by way of the radial ducts 9b to the outer edge of the periphery of the burner, wherein it is divided into a larger flow portion Fp supplying the peripheral chamber 6 and a smaller flow portion Fc ducted to the central chamber 7.
- the means for the branching 13 of the flow M is constructed using an intermediate plate 13, which is made of a single circular contoured piece provided with a convex central portion 13b with no openings and a number of radial arms 13a.
- the intermediate plate 13 covers the outlet of the vertical tubular duct 9a preventing direct flowing of the mixture M to the central chamber 7.
- the arms 13a of the intermediate plate 13 are interposed on the radial ducts 9b, dividing them in the direction of height "H", except at its peripheral end, wherein it forms an opening 16 below the peripheral chamber 6. These peripheral openings 16 supply the larger flow portion Fp, around 90% of the overall flow M.
- the arms of the intermediate plate 13 form said branch channels 13a above the radial ducts 9b, and up against the surface of the burner body ducting the smaller flow portion Fc, around 10%, in a return direction towards the centre of the burner.
- the smaller branched flow Fc reaches the central chamber via an opening 17 in its bottom. In this way, the smaller flow Fc travels a long circulation path of lenght "L" ( FIG. 2 ) before supplying the central chamber 7, so as to achieve the complete homogenization of the gas-air mixture M, said circulation path being longer than the radius R of the area of the central chamber 7.
- the present invention also covers a different construction (not shown in the drawings) of the above described central chamber 7 supply channel 13a, wherein the intermediate plate between the burner body 2 and the venturi body 9 is replaced by a flow Fc branch channel formed along the duct 9b of length "L", but of smaller width than "W”, by means of two parallel or divergent vertical walls projecting from the bottom of the radial duct 9b, which divide it into two ducts adjacent to one another in a horizontal direction and equal in height to that of the radial duct 9b.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Abstract
Description
- The present invention relates to a gas burner construction for a cooking hob, provided with three flame crowns and the outlets arranged radially in the burner body.
- Gas burners for cooking hobs provided with two flame crowns arranged peripherally in the body of the burner, on either side of an annular chamber for the distribution of the gas-air mixture, and with a third central flame crown disposed around a circular central chamber, are already known. The gas-primary air fuel mixture is produced in a bowl-shaped base provided with the gas injector, which is fixed below the cooking hob tray. The burner body is mounted above the hob for the intake of the primary air from the separating space between the hob tray and the burner body.
- In this type of known burner the gas-primary air mixture formed in the bowl-shaped base is diffused upstream from a vertical tubular duct of the burner body. Conduction and diffusion of the mixture towards the peripheral annular chamber is carried out by way of various horizontal "venturi" ducts extending in a radial direction from the outlet mouth of the vertical central duct.
- The problem to be resolved in a burner of this three flame-crown type, incorporating a central gas-air mixture distribution chamber, is supplying to the central flame crown from a common delivery flow diffused downstream from the central tubular duct and that the portion of branched flow towards the central chamber arrives with a homogeneous gas-air mixture, in order to achieve an efficient combustion at the central crown as well.
- The known solutions to the problem posed of supplying the central crown include either branching a portion of the common mixture flow directly from the central tubular duct output, or branching thereof from the radial diffusion ducts.
-
EP-1025392-A discloses a gas burner of this type, wherein the delivery of gas-air mixture corresponding to the central chamber, is supplied by way of access openings in the bottom of the central chamber, situated directly above the vertical central duct. This solution requires the construction of a concave wall on this chamber bottom separated from the tubular duct, with the drawback that a therefore combustion is deficient because the mixture does not have a long enough diffusion running to become homogeneous. - In
WO-03/036168-A - The object of the invention is a gas burner for a cooking hob of the type with a circular burner body with three flame crowns of radial outlets, of which two are peripheral crowns around a peripheral annular distribution chamber and the third a central crown around a central chamber, the gas-air mixture being led to both distribution chambers from a vertical mixture intake duct and diffused downstream by way of various horizontal "venturi" ducts, which are extended in a radial direction below the distribution chambers, wherein said radial diffusion ducts are provided with branch channels for supplying the central chamber with a homogenized portion of the mixture flow.
- The gas burner according to the present invention is provided with means to divide the mixture flow downstream from said horizontal radial ducts into two portions of flow discharging into the respective peripheral or central annular chamber, the flow portion ducted to the central chamber being composed of a homogenized mixture of gas and air. To achieve this objective for the purpose of maintaining efficient combustion at the central crown, the invention provides a channel for branching a portion of the mixture flow for the particular supply of the central chamber. The branch channel is constructed on each of the common mixture flow radial ducts and has a ducting section sized proportionally to the power of the central crown.
-
-
Figure 1 is a perspective view of a gas burner for a cooking hob, showing its different parts exploded in an assembly arrangement. -
Figure 2 is a sectional view of the assembled gas burner offigure 1 . -
Figure 3 is a sectional plan view of the gas burner offigure 2 according to line III-III. - In reference to
figures 1-3 , a preferred embodiment ofgas burner 1 according to the invention comprises the following burner parts: - a
circular burner body 2 provided with an outerperipheral flame crown 3, an innerperipheral flame crown 4, a peripheralannular chamber 6 for distributing the fuel mixture to the twocrowns central flame crown 5, and a circularcentral chamber 7 for distributing the fuel mixture tocentral crown 5; - a
burner cover 8 with an annular portion ofcover 8a covering theperipheral chamber 6, and a central portion ofcover 8b covering thecentral chamber 7; - a bowl-
shaped mixing base 10 under thecooking hob tray 14, provided with agas injector 11 and amixer chamber 12 for the gas G and the primary air A1; - a circular
outline venturi body 9 fitted under theflame crown body 2 and provided with a centralvertical duct 9a on themixer bowl 10, for the intake of the mixture and with varioushorizontal ducts 9b extending in a radial direction from thecentral duct 9a for conduction and diffusion of a flow of fuel mixture M to bothdistribution chambers - a
means 13 for branching the mixture flow M, which is placed intermediate between theburner body 2 and theventuri body 9, and provided with various radial branch arms forming aradial channel 13a on each of them for leading a smaller portion of flow Fc to thecentral chamber 7. - The mixer bowl-
base 10 takes in the primary air A1 from an opening above thecooking tray 14. Thecircular venturi body 9 is connected by its periphery to the burner body, whereby the walls of the latter close above theradial diffusion ducts 9b. The surface of theburner body 2 has various secondary air intake openings between bothperipheral crowns burner 1 described, the whole flow of mixture M is led by way of theradial ducts 9b to the outer edge of the periphery of the burner, wherein it is divided into a larger flow portion Fp supplying theperipheral chamber 6 and a smaller flow portion Fc ducted to thecentral chamber 7. - The means for the branching 13 of the flow M is constructed using an
intermediate plate 13, which is made of a single circular contoured piece provided with a convexcentral portion 13b with no openings and a number ofradial arms 13a. Theintermediate plate 13 covers the outlet of the verticaltubular duct 9a preventing direct flowing of the mixture M to thecentral chamber 7. Thearms 13a of theintermediate plate 13 are interposed on theradial ducts 9b, dividing them in the direction of height "H", except at its peripheral end, wherein it forms anopening 16 below theperipheral chamber 6. Theseperipheral openings 16 supply the larger flow portion Fp, around 90% of the overall flow M. The arms of theintermediate plate 13 form saidbranch channels 13a above theradial ducts 9b, and up against the surface of the burner body ducting the smaller flow portion Fc, around 10%, in a return direction towards the centre of the burner. The smaller branched flow Fc reaches the central chamber via an opening 17 in its bottom. In this way, the smaller flow Fc travels a long circulation path of lenght "L" (FIG. 2 ) before supplying thecentral chamber 7, so as to achieve the complete homogenization of the gas-air mixture M, said circulation path being longer than the radius R of the area of thecentral chamber 7. - In the
burner 1 embodiment described here the problem of resistance to the circulation of the flow Fc by way of the circulation path (FIG. 2 ) is resolved by means of the formation of aquadrangular section channel 13a over the width "W" of theradial duct 9b, which is also divergent upstream and whose height "H" (FIG.2 ) and width "W" (FIG.3 ) are sized in proportion to the heating power of thecentral crown 5 compared with the total power of the burner. - The present invention also covers a different construction (not shown in the drawings) of the above described
central chamber 7supply channel 13a, wherein the intermediate plate between theburner body 2 and theventuri body 9 is replaced by a flow Fc branch channel formed along theduct 9b of length "L", but of smaller width than "W", by means of two parallel or divergent vertical walls projecting from the bottom of theradial duct 9b, which divide it into two ducts adjacent to one another in a horizontal direction and equal in height to that of theradial duct 9b.
Claims (3)
- Gas burner for a cooking hob of the type that includes a circular burner body (2) provided with at least one peripheral flame crown (3,4) and one central flame crown 5, a peripheral annular chamber (6) for distributing the gas-air mixture (M) to the at least one peripheral crown (3,4), and a circular central chamber (7) for distribution to the central crown (5), a circular outline venturi body (9) connected to the body (2) of the flame crowns (3-5) below their periphery, and provided with a central vertical mixture (M) flow receiver duct (9a) and a number of horizontal venturi ducts (9b) extending in a radial direction for the diffusion of a common mixture flow (M) to both distribution chambers (6,7), and means (13, 13a,16, 17) for the branching and ducting a smaller mixture flow portion (Fc) for the individual supply of the central chamber (7), characterised in that said partial flow (Fc) branching and ducting means (13, 13a,16, 17) comprise a radial channel (13a) formed below the surface of the body (2) of the crowns (3,4,5) that starts downstream from said central venturi duct (9a),its length (L) being greater than the radius (R) of the area of the central chamber (7), whereby the circulation path of the partial flow (Fc) is prolonged for the sake of its complete homogenization in a return direction towards the center of the burner.
- Gas burner for a cooking hob according to claim 1, wherein said radial branch channel (13a) starts from the peripheral end (16) of each said radial venturi duct (9b) and extends in a radial direction downstream as far as an opening (17) in the bottom of the central chamber (7).
- Gas burner for a cooking hob according to claim 1, wherein said radial branch channel (13a) for the particular supply of the central chamber (7) is formed by means of an intermediate circular outline plate (13) provided with a convex central portion (13b) that covers the central vertical duct (9a), and with a number of radial branch arms interposed on the radial ducts (9b) of the venturi body (9) and of the same width (W) as these, which lead the partial flow (Fc) to the central chamber (7) by way of an opening (17) in the bottom of the latter.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES200302586U ES1056041Y (en) | 2003-11-11 | 2003-11-11 | TRIPLE CROWN GAS BURNER FOR COOKING PLATES. |
ES200302586U | 2003-11-11 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1531304A2 EP1531304A2 (en) | 2005-05-18 |
EP1531304A3 EP1531304A3 (en) | 2009-07-29 |
EP1531304B1 true EP1531304B1 (en) | 2011-08-03 |
Family
ID=31897197
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04380216A Not-in-force EP1531304B1 (en) | 2003-11-11 | 2004-11-03 | Triple crown gas burner for cooking hobs |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1531304B1 (en) |
AT (1) | ATE519074T1 (en) |
ES (2) | ES1056041Y (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11940148B2 (en) | 2021-10-28 | 2024-03-26 | Electrolux Appliances Aktiebolag | Multi injection dual ring gas burner for domestic gas cooking units |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007007298A2 (en) * | 2005-07-14 | 2007-01-18 | Enkay Bek Metal Enjeksiyon Sanayi Ticaret Limited Sirkei | A gas burner |
FR2889293B1 (en) * | 2005-07-29 | 2009-12-18 | Burner Systems Int Bsi | MULTI-CROWN GAS BURNER WITH CONCENTRIC FLAME |
ITTO20050685A1 (en) | 2005-09-30 | 2007-04-01 | Indesit Co Spa | COOKTOP WITH GAS BURNER INCLUDING A SEMIPERMEABLE ELEMENT |
ITMI20060535A1 (en) * | 2006-03-23 | 2007-09-24 | Enzo Inzaghi | MODULAR BURNER FOR COOKING PLATE |
ITTO20070133A1 (en) | 2007-02-26 | 2008-08-27 | Indesit Co Spa | GAS BURNER SYSTEM FOR FOOD COOKING APPLIANCES |
ITRN20070012A1 (en) | 2007-02-27 | 2008-08-28 | Indesit Company Spa | COOKTOP |
ITRN20070013A1 (en) | 2007-02-27 | 2008-08-28 | Indesit Company Spa | COOKTOP. |
US8689779B2 (en) * | 2009-01-23 | 2014-04-08 | Bsh Bosch Und Siemens Hausgeraete Gmbh | Gas burner |
JP5089753B2 (en) * | 2010-10-28 | 2012-12-05 | リンナイ株式会社 | Gas burner |
TR201010169A2 (en) * | 2010-12-07 | 2012-06-21 | Ser Dayanikli Tüketi̇m Mallari İç Ve Diş Ti̇caret Sanayi̇ Li̇mi̇ted Şi̇rketi̇ | A burner |
CN202494111U (en) * | 2012-02-16 | 2012-10-17 | 梁锦洪 | Burning device for gas stove |
CN103256598B (en) * | 2013-06-06 | 2015-08-05 | 山西亚乐士环保技术股份有限公司 | Biogas automatic classification burner |
CN105987383A (en) * | 2015-02-04 | 2016-10-05 | 浙江布鲁尼电器科技有限公司 | Combustor structure for gas stove |
CN110207161A (en) * | 2019-04-28 | 2019-09-06 | 绍兴市乐格电器有限公司 | A kind of pin-connected panel burner |
EP3748230B1 (en) * | 2019-06-03 | 2024-03-20 | Electrolux Appliances Aktiebolag | Gas burner assembly |
CN111189047B (en) * | 2020-01-03 | 2022-03-18 | 宁波方太厨具有限公司 | Burner for kitchen range and gas kitchen range using same |
CN114321917B (en) * | 2022-01-26 | 2023-04-07 | 佛山市顺德区美的洗涤电器制造有限公司 | Burner and gas stove |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2107401T3 (en) * | 1996-03-19 | 2000-02-01 | Sabaf Spa | GAS BURNER FOR KITCHEN DEVICES. |
EP1025392B1 (en) * | 1997-08-28 | 2003-09-10 | Aktiebolaget Electrolux | A gas hotplate burner |
-
2003
- 2003-11-11 ES ES200302586U patent/ES1056041Y/en not_active Expired - Fee Related
-
2004
- 2004-11-03 EP EP04380216A patent/EP1531304B1/en not_active Not-in-force
- 2004-11-03 ES ES04380216T patent/ES2370637T3/en active Active
- 2004-11-03 AT AT04380216T patent/ATE519074T1/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11940148B2 (en) | 2021-10-28 | 2024-03-26 | Electrolux Appliances Aktiebolag | Multi injection dual ring gas burner for domestic gas cooking units |
Also Published As
Publication number | Publication date |
---|---|
EP1531304A3 (en) | 2009-07-29 |
ES1056041Y (en) | 2004-06-01 |
EP1531304A2 (en) | 2005-05-18 |
ATE519074T1 (en) | 2011-08-15 |
ES2370637T3 (en) | 2011-12-21 |
ES1056041U (en) | 2004-02-16 |
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