EP1531304A2 - Triple crown gas burner for cooking hobs - Google Patents

Triple crown gas burner for cooking hobs Download PDF

Info

Publication number
EP1531304A2
EP1531304A2 EP04380216A EP04380216A EP1531304A2 EP 1531304 A2 EP1531304 A2 EP 1531304A2 EP 04380216 A EP04380216 A EP 04380216A EP 04380216 A EP04380216 A EP 04380216A EP 1531304 A2 EP1531304 A2 EP 1531304A2
Authority
EP
European Patent Office
Prior art keywords
central
radial
flow
chamber
mixture
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
EP04380216A
Other languages
German (de)
French (fr)
Other versions
EP1531304B1 (en
EP1531304A3 (en
Inventor
Inaki Ayastuy Aretxaga
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.)
Coprecitec SL
Original Assignee
Coprecitec SL
Fagor Electrodomesticos S Coop
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
Priority to ES200302586U priority Critical
Priority to ES200302586U priority patent/ES1056041Y/en
Application filed by Coprecitec SL, Fagor Electrodomesticos S Coop filed Critical Coprecitec SL
Publication of EP1531304A2 publication Critical patent/EP1531304A2/en
Publication of EP1531304A3 publication Critical patent/EP1531304A3/en
Application granted granted Critical
Publication of EP1531304B1 publication Critical patent/EP1531304B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/06Premix 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D2900/00Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/14Special features of gas burners
    • F23D2900/14062Special features of gas burners for cooking ranges having multiple flame rings

Abstract

The gas burner for a cooking hob includes a circular body (2) with at least one peripheral flame crown (3,4) and one central flame crown (5), each of them with its respective annular chamber (6,7) for distributing the mixture (M), various horizontal venturi ducts (9b) extending in a radial direction, and a radial channel (13a) formed below the surface of the crowns (3,4,5), its length (L) being longer than the radius (R) of the area of the central chamber (7), whereby the circulation path (L) of said flow portion (Fc) is prolonged for the purpose of the complete homogenizing the mixture. Said radial branch channels (13a) extend from the peripheral end (16) of each radial venturi duct (9b) in a radial direction upstream as far as an opening (17) in the bottom of the central chamber (7), and they are formed by means of an intermediate plate (13) between the body (2) of the flame crowns and said radial venturi ducts (9b).

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.
  • Prior art
  • 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 upstream 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 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. On this burner, 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.
  • Disclosure of the invention
  • 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 upstream 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 upstream 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, said channel being of a long diffusis completed. 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.
  • Description of the drawings
  • 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 of figure 1.
  • Figure 3 is a sectional plan view of the gas burner of figure 2 according to line III-III.
  • Description of a preferred embodiment
  • In reference to figures 1-3, a preferred embodiment of gas burner 1 according to the invention comprises the following burner parts:
    • a circular burner body 2 provided with an outer peripheral flame crown 3, an inner peripheral flame crown 4, a peripheral annular chamber 6 for distributing the fuel mixture to the two crowns 3,4, a central flame crown 5, and a circular central chamber 7 for distributing the fuel mixture to central crown 5;
    • a burner cover 8 with an annular portion of cover 8a covering the peripheral chamber 6, and a central portion of cover 8b covering the central chamber 7;
    • a bowl-shaped mixing base 10 under the cooking hob tray 14, provided with a gas injector 11 and a mixer chamber 12 for the gas G and the primary air A1;
    • a circular outline venturi body 9 fitted under the flame crown body 2 and provided with a central vertical duct 9a on the mixer bowl 10, for the intake of the mixture and with various horizontal ducts 9b extending in a radial direction from the central duct 9a for conduction and diffusion of a flow of fuel mixture M to both distribution chambers 6,7; and
    • a means 13 for branching the mixture flow M, which is placed intermediate between the burner body 2 and the venturi body 9, and provided with various radial branch arms forming a radial channel 13a on each of them for leading a smaller portion of flow Fc to the central chamber 7.
  • 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. In the embodiment of burner 1 described, 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 diffusion path "L" (FIG. 2) before supplying the central chamber 7, so as to achieve the complete homogenization of the gas-air mixture M, said circulation run "L" being longer than the radius R of the area of the central chamber 7.
  • In the burner 1 embodiment described here the problem of resistance to the circulation of the flow Fc by way of ducting path "L" (FIG. 2) is resolved by means of the formation of a quadrangular section channel 13a over the width "W" of the radial 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 the central 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 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.

Claims (3)

  1. 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 upstream 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 (L) of the partial mixture flow (Fc) is prolonged for the sake of its complete homogenization.
  2. 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 adial venturi duct (9b) and extends in a radial direction upstream as far as an opening (17) in the bottom of the central chamber (7).
  3. 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.
EP20040380216 2003-11-11 2004-11-03 Triple crown gas burner for cooking hobs Expired - Fee Related EP1531304B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES200302586U 2003-11-11
ES200302586U ES1056041Y (en) 2003-11-11 2003-11-11 Triple crown gas burner for cooking plates.

Publications (3)

Publication Number Publication Date
EP1531304A2 true EP1531304A2 (en) 2005-05-18
EP1531304A3 EP1531304A3 (en) 2009-07-29
EP1531304B1 EP1531304B1 (en) 2011-08-03

Family

ID=31897197

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040380216 Expired - Fee Related 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) AT519074T (en)
ES (2) ES1056041Y (en)

Cited By (14)

* Cited by examiner, † Cited by third party
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
WO2008104845A2 (en) * 2007-02-26 2008-09-04 Indesit Company S.P.A. Gas burner system for food cooking appliances
US7901205B2 (en) * 2005-07-29 2011-03-08 Burner Systems International (Bsi) Gas burner with multiple concentric flame rings
US7967004B2 (en) * 2006-03-23 2011-06-28 Steel Time S.P.A. Modular burner for a cooking plate
CN102466228A (en) * 2010-10-28 2012-05-23 林内株式会社 Gas burner
WO2012077050A2 (en) * 2010-12-07 2012-06-14 Ser Dayanikli Tuketim Mallari Ic Ve Dis Ticaret Sanayi Limited Sirketi A gas burner
EP2211095A3 (en) * 2009-01-23 2013-02-20 BSH Bosch und Siemens Hausgeräte GmbH Gas burner
US8662069B2 (en) 2005-09-30 2014-03-04 Indesit Company S.P.A. Cooking top with gas burner comprising a semi-permeable element
US8683991B2 (en) 2007-02-27 2014-04-01 Indesit Company, S.P.A. Cooking top
US9285115B2 (en) 2007-02-27 2016-03-15 Indesit Company S.P.A. Cooking top
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
AU2012203266B2 (en) * 2012-02-16 2017-08-03 Jinhong Liang Burner for gas ovens
CN111189047A (en) * 2020-01-03 2020-05-22 宁波方太厨具有限公司 Burner for kitchen range and gas kitchen range using same
EP3748230A1 (en) * 2019-06-03 2020-12-09 Electrolux Appliances Aktiebolag Base part for a gas burner assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0797048A1 (en) * 1996-03-19 1997-09-24 SABAF S.p.A. Gas burner for kitchen appliances
WO1999011975A1 (en) * 1997-08-28 1999-03-11 Aktiebolaget Electrolux A gas hotplate burner

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0797048A1 (en) * 1996-03-19 1997-09-24 SABAF S.p.A. Gas burner for kitchen appliances
WO1999011975A1 (en) * 1997-08-28 1999-03-11 Aktiebolaget Electrolux A gas hotplate burner

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007007298A3 (en) * 2005-07-14 2007-03-29 Enkay Bek Metal Enjeksiyon San A gas burner
WO2007007298A2 (en) * 2005-07-14 2007-01-18 Enkay Bek Metal Enjeksiyon Sanayi Ticaret Limited Sirkei A gas burner
US7901205B2 (en) * 2005-07-29 2011-03-08 Burner Systems International (Bsi) Gas burner with multiple concentric flame rings
US8662069B2 (en) 2005-09-30 2014-03-04 Indesit Company S.P.A. Cooking top with gas burner comprising a semi-permeable element
US7967004B2 (en) * 2006-03-23 2011-06-28 Steel Time S.P.A. Modular burner for a cooking plate
WO2008104845A2 (en) * 2007-02-26 2008-09-04 Indesit Company S.P.A. Gas burner system for food cooking appliances
WO2008104845A3 (en) * 2007-02-26 2009-04-09 Indesit Co Spa Gas burner system for food cooking appliances
RU2498157C2 (en) * 2007-02-26 2013-11-10 Индезит Компани С.П.А. System of burners of domestic gas cooker
EP2947386A3 (en) * 2007-02-26 2015-12-02 Indesit Company S.p.A. Gas burners system for food cooking appliances, and gas burner thereof
US8746229B2 (en) 2007-02-26 2014-06-10 Indesit Company S.P.A. Gas burner system for food cooking appliances
US9285115B2 (en) 2007-02-27 2016-03-15 Indesit Company S.P.A. Cooking top
US8683991B2 (en) 2007-02-27 2014-04-01 Indesit Company, S.P.A. Cooking top
EP2211095A3 (en) * 2009-01-23 2013-02-20 BSH Bosch und Siemens Hausgeräte GmbH Gas burner
CN101799161B (en) * 2009-01-23 2015-03-25 Bsh博施及西门子家用器具有限公司 Gas burner
US8689779B2 (en) 2009-01-23 2014-04-08 Bsh Bosch Und Siemens Hausgeraete Gmbh Gas burner
CN102466228B (en) * 2010-10-28 2015-06-10 林内株式会社 Gas burner
CN102466228A (en) * 2010-10-28 2012-05-23 林内株式会社 Gas burner
WO2012077050A3 (en) * 2010-12-07 2013-11-21 Ser Dayanikli Tuketim Mallari Ic Ve Dis Ticaret Sanayi Limited Sirketi A gas burner
WO2012077050A2 (en) * 2010-12-07 2012-06-14 Ser Dayanikli Tuketim Mallari Ic Ve Dis Ticaret Sanayi Limited Sirketi A gas burner
AU2012203266B2 (en) * 2012-02-16 2017-08-03 Jinhong Liang Burner for gas ovens
AU2012203266A8 (en) * 2012-02-16 2017-09-14 Jinhong Liang Burner for gas ovens
AU2012203266B8 (en) * 2012-02-16 2017-09-14 Jinhong Liang Burner for gas ovens
EP2629010A3 (en) * 2012-02-16 2018-01-10 Jinhong Liang Burner for gas ovens
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
EP3748230A1 (en) * 2019-06-03 2020-12-09 Electrolux Appliances Aktiebolag Base part for a gas burner assembly
CN111189047A (en) * 2020-01-03 2020-05-22 宁波方太厨具有限公司 Burner for kitchen range and gas kitchen range using same

Also Published As

Publication number Publication date
ES2370637T3 (en) 2011-12-21
ES1056041Y (en) 2004-06-01
ES1056041U (en) 2004-02-16
EP1531304A3 (en) 2009-07-29
EP1531304B1 (en) 2011-08-03
AT519074T (en) 2011-08-15

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