WO2003036168A1 - Gas burner with several flame sectors - Google Patents

Gas burner with several flame sectors Download PDF

Info

Publication number
WO2003036168A1
WO2003036168A1 PCT/EP2002/011846 EP0211846W WO03036168A1 WO 2003036168 A1 WO2003036168 A1 WO 2003036168A1 EP 0211846 W EP0211846 W EP 0211846W WO 03036168 A1 WO03036168 A1 WO 03036168A1
Authority
WO
WIPO (PCT)
Prior art keywords
flame
burner
hob
sectors
annular
Prior art date
Application number
PCT/EP2002/011846
Other languages
French (fr)
Inventor
Carlo Paesani
Original Assignee
Officine Meccaniche Defendi S.R.L.
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 Officine Meccaniche Defendi S.R.L. filed Critical Officine Meccaniche Defendi S.R.L.
Priority to AT02801909T priority Critical patent/ATE438830T1/en
Priority to EP02801909A priority patent/EP1459012B1/en
Priority to DE60233259T priority patent/DE60233259D1/en
Publication of WO2003036168A1 publication Critical patent/WO2003036168A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/08—Arrangement or mounting of burners
    • F24C3/085—Arrangement or mounting of burners on ranges
    • 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
    • F23D14/065—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 with injector axis inclined to the burner head axis
    • 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

  • This invention relates to a gas burner with several flame sectors.
  • Gas burners for food cooking comprising a burner body fed via a nozzle by a gas flow which entrains a flow of primary air and mixes therewith to form a mixture which when suitably ignited generates a ring of radial flames adjustable in size by a tap positioned upstream of the nozzle.
  • double ring In addition to traditional burners comprising one flame ring, so-called “double ring”, “triple ring” and double burners are also commercially available. These latter comprise two flame rings controllable separately by one or two feed taps.
  • Burners of this type generally draw their primary and secondary air from above the cooking utensil so that normal burner operation is not interrupted by possible air movements which may take place within the interior of the cooking appliance, caused for example by the opening of a door in a furniture unit positioned below the cooking hob or by the presence of the oven situated under said hob.
  • European patent application 0 543 301 relates to a burner of small dimensions and hence suitable for mounting in built-in hobs, which comprises two flame rings and uses primary and secondary air taken from above the cooking hob.
  • the air-gas mixture is created by a radial venturi of very low height, and is distributed within the two flame rings via four horizontally disposed radial conduits.
  • European patent 0 797 048 describes a burner similar to the preceding characterised by the presence of a third flame ring present in the central part of the burner.
  • the flames are distributed over two or at most three flame rings which are hence directed mostly towards the outside rather than the inside of the base of the pan.
  • a drawback of these burners consists of the fact that, as the third ring is provided on a fairly large diameter and as it is directed towards the outside of the cooking utensil, the resultant cooking is not uniform over the entire pan.
  • An object of the invention is to eliminate this drawback by providing a flame burner with four or more flames having excellent flame distribution below the pan to hence obtain high cooking efficiency while at the same time maintaining the now well consolidated dimensioning and operating principle.
  • Figure 1 is a plan view of a burner according to the invention
  • Figure 2 is a section through the burner on the line ll-ll of Figure 1
  • Figure 3 is a plan view of the venturi tube
  • Figure 4 is a section therethrough on the line IV-IV of Figure 3
  • Figure 5 is a plan view of the hollow body
  • Figure 6 is a plan view of a different embodiment of the burner
  • FIG 7 is a longitudinal section therethrough on the line VI-VI of Figure 6.
  • the burner of the invention comprises a cup piece 2 provided lowerly with a conduit 4 feeding an injector 6. At its upper edge, the cup piece comprises an annular flange 8 for its fixing to the sheet metal 10 of the cooking hob.
  • a flame divider element indicated overall by 12 and consisting of two parts, namely the venturi tube 14 and the hollow body 16, these being joined together by connection elements 18.
  • the venturi tube 14 comprises, for its support and centering on the cup piece 2, a flange 20 rigid with a frusto-conical tube piece 22 facing the injector 6 and from which there extent four equiangular radial webs 24 which with the hob 10 and annular flange 8 form radial channels 26 for entry of the primary air.
  • the hollow body 16 presents a circular central portion 28 from which four radial webs 30 extend to form elements by which two annular chambers 32, 34 respectively are joined together.
  • the outer annular chamber 34 comprises along its outer edge a first ring 36 of flame slits and along its inner edge a second ring 38 of flame slits 38. Said ring is closed upperly by an annular cap 40.
  • the inner annular chamber 32 comprises along its outer edge a third ring 40 of flame slits and along its inner edge a fourth ring 42 of flame slits.
  • the fourth flame ring 42 is formed as four sectors 44, with the flame slits of each sector disposed parallel to each other.
  • the annular chamber 32 is closed upperly by an annular cap 46.
  • the central portion 28 forms a mixing chamber 48 from which there radially extend four conduits 50 which: - convey the air-gas mixture via apertures 52 to the annular chamber 32 which feeds the flame rings 40, 42, and - convey the air-gas mixture via apertures 54 to the annular chamber 34 which feeds the flame rings 36 and 38.
  • the flame divider 12 forms channels 56 for the passage of secondary air to the second 38, third 40 and fourth 42 flame ring.
  • the central portion 28 comprises on its surface an annular rim 58 in which flame slits 60 are provided.
  • the central body also presents a hole 62 feeding a venturi nozzle 64 faced by a closure plate 66.
  • This embodiment with five flame rings presents the further advantage that the flame is directed into a very localized central region.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)

Abstract

A gas burner with several flame sectors for cooking appliances, comprising: a cup (2) positioned below the hob and provided with an injector (4) which forms a gas mixture with primary air originating from outside the hob, a flame divider (12) superposed on said cup and comprising a radial venturi tube (14) connected to two concentric annular chambers (32,34), caps (40,46) closing said annular tubes, the secondary air originating from outside the hob, characterised in that said flame divider presents four mutually concentric flame rings (36,38,40,42).

Description

GAS BURNER WITH SEVERAL FLAME SECTORS
This invention relates to a gas burner with several flame sectors.
Gas burners for food cooking are known, comprising a burner body fed via a nozzle by a gas flow which entrains a flow of primary air and mixes therewith to form a mixture which when suitably ignited generates a ring of radial flames adjustable in size by a tap positioned upstream of the nozzle.
In addition to traditional burners comprising one flame ring, so-called "double ring", "triple ring" and double burners are also commercially available. These latter comprise two flame rings controllable separately by one or two feed taps.
This type of burner has been available for some time, but recently it has been sought to limit its dimensions to enable it to be also used in built-in cooking hobs having a height of about 30 mm, in addition to its use in free-standing cookers. Burners of this type generally draw their primary and secondary air from above the cooking utensil so that normal burner operation is not interrupted by possible air movements which may take place within the interior of the cooking appliance, caused for example by the opening of a door in a furniture unit positioned below the cooking hob or by the presence of the oven situated under said hob.
Published European patent application 0 543 301 relates to a burner of small dimensions and hence suitable for mounting in built-in hobs, which comprises two flame rings and uses primary and secondary air taken from above the cooking hob. The air-gas mixture is created by a radial venturi of very low height, and is distributed within the two flame rings via four horizontally disposed radial conduits. European patent 0 797 048 describes a burner similar to the preceding characterised by the presence of a third flame ring present in the central part of the burner.
In these burners, as in similar commercially available burners, the flames are distributed over two or at most three flame rings which are hence directed mostly towards the outside rather than the inside of the base of the pan.
A drawback of these burners consists of the fact that, as the third ring is provided on a fairly large diameter and as it is directed towards the outside of the cooking utensil, the resultant cooking is not uniform over the entire pan. An object of the invention is to eliminate this drawback by providing a flame burner with four or more flames having excellent flame distribution below the pan to hence obtain high cooking efficiency while at the same time maintaining the now well consolidated dimensioning and operating principle.
This and further objects which will be apparent from the ensuing description are attained according to the invention by a gas burner with several flame sectors for cooking appliances as described in claim 1.
A preferred embodiment of this invention and a variant thereof are described in detail hereinafter with reference to the accompanying drawings, in which: Figure 1 is a plan view of a burner according to the invention,
Figure 2 is a section through the burner on the line ll-ll of Figure 1 , Figure 3 is a plan view of the venturi tube, Figure 4 is a section therethrough on the line IV-IV of Figure 3, Figure 5 is a plan view of the hollow body, Figure 6 is a plan view of a different embodiment of the burner, and
Figure 7 is a longitudinal section therethrough on the line VI-VI of Figure 6. As can be seen from the figures, the burner of the invention comprises a cup piece 2 provided lowerly with a conduit 4 feeding an injector 6. At its upper edge, the cup piece comprises an annular flange 8 for its fixing to the sheet metal 10 of the cooking hob. On the cup 2 there rests a flame divider element, indicated overall by 12 and consisting of two parts, namely the venturi tube 14 and the hollow body 16, these being joined together by connection elements 18.
The venturi tube 14 comprises, for its support and centering on the cup piece 2, a flange 20 rigid with a frusto-conical tube piece 22 facing the injector 6 and from which there extent four equiangular radial webs 24 which with the hob 10 and annular flange 8 form radial channels 26 for entry of the primary air.
The hollow body 16 presents a circular central portion 28 from which four radial webs 30 extend to form elements by which two annular chambers 32, 34 respectively are joined together.
The outer annular chamber 34 comprises along its outer edge a first ring 36 of flame slits and along its inner edge a second ring 38 of flame slits 38. Said ring is closed upperly by an annular cap 40. The inner annular chamber 32 comprises along its outer edge a third ring 40 of flame slits and along its inner edge a fourth ring 42 of flame slits. The fourth flame ring 42 is formed as four sectors 44, with the flame slits of each sector disposed parallel to each other. The annular chamber 32 is closed upperly by an annular cap 46.
With the upper edge of the tube piece 22 the central portion 28 forms a mixing chamber 48 from which there radially extend four conduits 50 which: - convey the air-gas mixture via apertures 52 to the annular chamber 32 which feeds the flame rings 40, 42, and - convey the air-gas mixture via apertures 54 to the annular chamber 34 which feeds the flame rings 36 and 38. With the hob 10 and annular flange 8 the flame divider 12 forms channels 56 for the passage of secondary air to the second 38, third 40 and fourth 42 flame ring.
From the aforegoing it is apparent that the burner of the invention presents numerous advantages, and in particular:
- it presents excellent flame distribution in that the most inner ring directs its flames towards the central part of the pan,
- it enables primary air and secondary air to be taken from above the hob,
- it is of low height because of the radial configuration of the venturi tube. In the embodiment shown in Figures 6 and 7, the central portion 28 comprises on its surface an annular rim 58 in which flame slits 60 are provided.
The central body also presents a hole 62 feeding a venturi nozzle 64 faced by a closure plate 66.
This embodiment with five flame rings presents the further advantage that the flame is directed into a very localized central region.

Claims

C L A I M S
1. A gas burner with several flame sectors for cooking appliances, comprising:
- a cup (2) positioned below the hob and provided with an injector(4) which forms a gas mixture with primary air originating from outside the hob, - a flame divider (12) superposed on said cup and comprising a radial venturi tube (14) connected to two concentric annular chambers (32, 34),
- caps (40, 46) closing said annular tubes, the secondary air originating from outside the hob, characterised in that said flame divider presents four mutually concentric flame rings (36, 38, 40, 42).
2. A burner as claimed in claim 1 , characterised by comprising radial channels (50) presenting apertures (52) which connect them to the annular conduit (32), and in the walls of which there are provided the flame slits of the third (40) and fourth (42) flame rings.
3. A burner as claimed in claim 1 , characterised in that with the hob (10) and annular flange (8) the flame divider forms channels (56) for the passage of secondary air to the second (38), third (40) and fourth (42) flame ring.
4. A burner as claimed in claim 1 , characterised in that the fourth flame ring (42) is formed in four sectors (44).
5. A burner as claimed in claim 4, characterised in that the flame slits of each sector (44) are mutually parallel.
6. A burner as claimed in claim 1 , characterised in that the flame divider presents a central body (28) comprising a rim in which fifth flame slits (60) are provided and further comprising a hole (62) feeding a venturi nozzle (64).
PCT/EP2002/011846 2001-10-24 2002-10-23 Gas burner with several flame sectors WO2003036168A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT02801909T ATE438830T1 (en) 2001-10-24 2002-10-23 GAS BURNER WITH MULTIPLE FLAME SECTORS
EP02801909A EP1459012B1 (en) 2001-10-24 2002-10-23 Gas burner with several flame sectors
DE60233259T DE60233259D1 (en) 2001-10-24 2002-10-23 Gas burner with multiple flame elements

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2001VE000043A ITVE20010043A1 (en) 2001-10-24 2001-10-24 GAS BURNER WITH SEVERAL FLAME SECTORS
ITVE2001A000043 2001-10-24

Publications (1)

Publication Number Publication Date
WO2003036168A1 true WO2003036168A1 (en) 2003-05-01

Family

ID=11461090

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/011846 WO2003036168A1 (en) 2001-10-24 2002-10-23 Gas burner with several flame sectors

Country Status (5)

Country Link
EP (1) EP1459012B1 (en)
AT (1) ATE438830T1 (en)
DE (1) DE60233259D1 (en)
IT (1) ITVE20010043A1 (en)
WO (1) WO2003036168A1 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1469256A2 (en) * 2003-04-18 2004-10-20 SMEG S.p.A. Gas ring for a cooking range
WO2004092655A1 (en) * 2003-04-18 2004-10-28 So.M.I. Press-Societa' Metalli Iniettati S.P.A. Gas cooker burner of improved type
WO2004113792A1 (en) * 2003-06-23 2004-12-29 Sami Srl Triple crown gas burner
WO2007007298A2 (en) * 2005-07-14 2007-01-18 Enkay Bek Metal Enjeksiyon Sanayi Ticaret Limited Sirkei A gas burner
WO2008033238A2 (en) * 2006-09-11 2008-03-20 Uwe Harneit Improved gas burner
US7594812B2 (en) * 2005-01-17 2009-09-29 SO. M. I Press - Societa′ Metalli Iniettati, SpA Double burner for gas cookers, of the type provided with multiple concentric flame crowns
CN102889620A (en) * 2011-07-21 2013-01-23 林内株式会社 Gas furnace
WO2014170707A1 (en) * 2013-04-17 2014-10-23 Sabaf S.P.A. Gas burner for cooking hobs
CN105402780A (en) * 2015-12-28 2016-03-16 浙江博立灶具科技有限公司 Commercial gas cooking oven for cooking
EP3012527A1 (en) * 2014-10-21 2016-04-27 BSH Hausgeräte GmbH Gas cooking equipment and hotplate
CN105782980A (en) * 2016-05-10 2016-07-20 广东星立方厨房科技有限公司 Distributor seat of burner and stove burner
CN109595603A (en) * 2018-12-18 2019-04-09 成都前锋电子有限责任公司 A kind of fire distributor for gas cookers
US10317088B2 (en) 2015-07-02 2019-06-11 Mabe, S.A. De C.V. Triple ring flame burner
US10393371B2 (en) 2016-12-30 2019-08-27 Whirlpool Corporation Gas burner

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2854279T3 (en) * 2015-03-10 2021-09-21 Ego Elektro Geraetebau Gmbh Improved gas burner
CN108036314A (en) * 2017-12-29 2018-05-15 华帝股份有限公司 Special structure combustor of giving vent to anger

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2405431A1 (en) * 1977-10-10 1979-05-04 Martinez Antoine Gas burner for cooker - has two concentric rings at different levels with radial slots to allow flow of gas
GB2197063A (en) * 1986-10-29 1988-05-11 Chin Shin Chang Gas burner construction
EP0797048A1 (en) * 1996-03-19 1997-09-24 SABAF S.p.A. Gas burner for kitchen appliances
US5842849A (en) * 1997-09-05 1998-12-01 Huang; Hsu-Sheng Gas burner
WO1999011975A1 (en) * 1997-08-28 1999-03-11 Aktiebolaget Electrolux A gas hotplate burner
US6132205A (en) * 2000-01-06 2000-10-17 Harneit; Uwe Multi-ring sealed gas burner

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2405431A1 (en) * 1977-10-10 1979-05-04 Martinez Antoine Gas burner for cooker - has two concentric rings at different levels with radial slots to allow flow of gas
GB2197063A (en) * 1986-10-29 1988-05-11 Chin Shin Chang Gas burner construction
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
US5842849A (en) * 1997-09-05 1998-12-01 Huang; Hsu-Sheng Gas burner
US6132205A (en) * 2000-01-06 2000-10-17 Harneit; Uwe Multi-ring sealed gas burner

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004092655A1 (en) * 2003-04-18 2004-10-28 So.M.I. Press-Societa' Metalli Iniettati S.P.A. Gas cooker burner of improved type
EP1469256A3 (en) * 2003-04-18 2005-01-05 SMEG S.p.A. Gas ring for a cooking range
EP1469256A2 (en) * 2003-04-18 2004-10-20 SMEG S.p.A. Gas ring for a cooking range
WO2004113792A1 (en) * 2003-06-23 2004-12-29 Sami Srl Triple crown gas burner
US7594812B2 (en) * 2005-01-17 2009-09-29 SO. M. I Press - Societa′ Metalli Iniettati, SpA Double burner for gas cookers, of the type provided with multiple concentric flame crowns
WO2007007298A2 (en) * 2005-07-14 2007-01-18 Enkay Bek Metal Enjeksiyon Sanayi Ticaret Limited Sirkei A gas burner
WO2007007298A3 (en) * 2005-07-14 2007-03-29 Enkay Bek Metal Enjeksiyon San A gas burner
WO2008033238A2 (en) * 2006-09-11 2008-03-20 Uwe Harneit Improved gas burner
WO2008033238A3 (en) * 2006-09-11 2008-07-03 Uwe Harneit Improved gas burner
CN102889620B (en) * 2011-07-21 2016-08-10 林内株式会社 Gas furnace
CN102889620A (en) * 2011-07-21 2013-01-23 林内株式会社 Gas furnace
WO2014170707A1 (en) * 2013-04-17 2014-10-23 Sabaf S.P.A. Gas burner for cooking hobs
EP3012527A1 (en) * 2014-10-21 2016-04-27 BSH Hausgeräte GmbH Gas cooking equipment and hotplate
US10317088B2 (en) 2015-07-02 2019-06-11 Mabe, S.A. De C.V. Triple ring flame burner
CN105402780A (en) * 2015-12-28 2016-03-16 浙江博立灶具科技有限公司 Commercial gas cooking oven for cooking
CN105782980A (en) * 2016-05-10 2016-07-20 广东星立方厨房科技有限公司 Distributor seat of burner and stove burner
CN105782980B (en) * 2016-05-10 2018-01-16 广东星立方厨房科技有限公司 The distributor seat and cooker burner of a kind of burner
US10393371B2 (en) 2016-12-30 2019-08-27 Whirlpool Corporation Gas burner
US10767857B2 (en) 2016-12-30 2020-09-08 Whirlpool Corporation Gas burner
CN109595603A (en) * 2018-12-18 2019-04-09 成都前锋电子有限责任公司 A kind of fire distributor for gas cookers
CN109595603B (en) * 2018-12-18 2023-12-29 成都前锋电子有限责任公司 Distributor for gas cooker

Also Published As

Publication number Publication date
EP1459012B1 (en) 2009-08-05
EP1459012A1 (en) 2004-09-22
DE60233259D1 (en) 2009-09-17
ATE438830T1 (en) 2009-08-15
ITVE20010043A1 (en) 2003-04-24

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