EP3004737A1 - Improved gas burner - Google Patents
Improved gas burnerInfo
- Publication number
- EP3004737A1 EP3004737A1 EP14733301.7A EP14733301A EP3004737A1 EP 3004737 A1 EP3004737 A1 EP 3004737A1 EP 14733301 A EP14733301 A EP 14733301A EP 3004737 A1 EP3004737 A1 EP 3004737A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- annular
- burner
- lateral
- central
- distribution chamber
- 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
Links
- 238000009826 distribution Methods 0.000 claims abstract description 25
- 238000010411 cooking Methods 0.000 claims abstract description 23
- 230000000694 effects Effects 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 claims abstract 2
- 230000000284 resting effect Effects 0.000 claims abstract 2
- 238000003825 pressing Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000009977 dual effect Effects 0.000 description 4
- 241001272720 Medialuna californiensis Species 0.000 description 3
- 230000001788 irregular Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005574 cross-species transmission Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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 an improved gas burner.
- Burners with several flame rings of the so-called multi-ring type are known, provided with a single gas inlet controlled by a standard single-exit valve.
- the valve enables the gas to be fed to the burner inlet and from there simultaneously to all the flame rings, of both maximum and minimum capacity.
- Burners with several flame rings of the so-called dual type are also known, which present two gas inlets, one associated with the burner outer portion, usually of annular shape, and the other associated with its central inner portion of circular shape.
- this type of burner uses a special two-way valve, enabling two operative conditions: one of maximum power, in which both the burner portions are fed, and one in which the outer annular portion is not fed, so enabling more modular use and allowing a very low minimum power to be delivered.
- a multi-ring burner which uses primary air and secondary air both originating from above the cooking hob.
- it presents three cup-shaped closed chambers, each of which houses an injector; in greater detail, the injector positioned in the central cup feeds the circular central portion with gas, while the two lateral injectors each feed an outer portion of substantially half-moon shape.
- mixing takes place by virtue of a venturi conduit of essentially radial type, i.e. with a gas and primary air feed conduit which open into a radially extending mixing chamber.
- venturi conduits each of which is formed by a vertical conduit which widens from the bottom upwards and creates a venturi effect by interaction with a dome-shaped projection provided in the lower face of the flame divider.
- this projection is inserted in the top of the vertical conduit such that the lower face of this projection and the upper terminal part of this conduit define a narrow passage causing the mixture to accelerate, giving rise to the venturi effect. Consequently, the two venturi conduits which feed the outer portions are also of substantially radial type, mixture acceleration taking place by virtue of the combination of a vertical conduit merging into a horizontal half-moon shaped chamber.
- a first drawback of this solution is its particularly high production cost; in particular the dome projection provided in the lower face of the flame divider cannot be formed by the normal sheet metal cold-pressing process used for producing nearly all burners, but instead requires cast-iron casting or steel sintering processes, which are much more costly.
- WO2004/044490 describes a multi-ring burner fed with primary air and secondary air both totally drawn from above the cooking hob.
- the central injector feeds the central portion of the burner via a radial venturi
- the other two lateral injectors feed the outer annular portion of the burner via two Venturis of radial type such as those described in IT 1232887.
- this type of venturi requires its horizontal chamber to have rather large dimensions, and presents an internal diameter widening in that zone into which said radial Venturis flow; in other words, the annular portion is of unusual and irregular shape.
- the vertical conduits of this burner are cylindrical, do not present any converging and/or diverging portions and do not cause any vertical venturi effect.
- the vertical lateral conduits present a constriction which then passes into a zone having a significant radial extension; the combination of these characteristics defines a venturi of radial effect.
- This type of burner presents a third ring of flames which emerge from the annular portion and are directed inward; however said flames are distributed along an irregular annular profile. Because of this, traditional inexpensive closure covers of regular annular shape cannot be used to upperly close the chamber defined by the irregular annular portion. Consequently, this solution is particularly costly and characterised by a particular non-traditional appearance little liked by cooking hob manufacturers.
- WO2005/078342 describes a multi-ring burner also fed with primary and secondary air both drawn from above the cooking hob. It is composed of a single cup closed at its bottom and housing three injectors, in which the central injector is disposed vertically and feeds the central portion with gas, while the other two lateral injectors are inclined outward.
- the flame divider body is formed in two parts which when connected together define two inclined conduits of venturi effect facing said lateral injectors.
- US 2011/151385 describes a burner comprising a support body to be fixed to the lower surface of the cooking hob sheet metal; it is provided with three injectors facing three conduits defined in the flame divider. Inside the flame divider at the exit of the vertical venturi, barriers are provided to prevent flame separation phenomena. The outer edges of the flame divider body rest on the cooking hob sheet metal. In the light of all these characteristics, it is particularly complicated both to produce and to mount.
- US 2010/279238 describes a burner comprising a support body provided with three injectors facing three vertical venturi conduits defined in the flame divider. In particular, the lateral vertical venturi conduits are rather lengthy, hence the burner is particularly tall and bulky in height. Moreover, in the light of the numerous components required, it is particularly complicated constructionally and hence costly.
- An object of the invention is to eliminate the drawbacks of the known solutions by providing an improved three flame-ring gas burner which can operate both as a multi-ring and as a dual burner.
- Another object of the invention is to provide an improved gas burner, the flames of which are not disturbed by sudden opening of an oven or unit door positioned below the cooking hob.
- Another object of the invention is to provide an improved gas burner of reduced overall height.
- Another object of the invention is to provide an improved gas burner of simple, rapid and low-cost construction.
- Figure 1 is a vertical section through a first embodiment of the improved gas burner according to the invention
- Figure 2 is a vertical section therethrough perpendicular to that of Figure 1
- Figure 3 shows it in plan view under maximum flow conditions
- Figure 4 is a plan view of the injector holder of the burner of Figure 1 .
- Figure 5 is a vertical section through a first embodiment of the improved gas burner according to the invention.
- Figure 6 is a vertical section therethrough perpendicular to that of Figure 5.
- the improved gas burner 2 comprises an injector holder 4 provided with a gas inlet 6 associated with a standard single-exit valve, not shown.
- these figures show a burner according to the invention in the multi-ring version, i.e. in which all the flame rings are fed by a single gas source and are regulated altogether in the same manner.
- a conduit 8 is provided which faces the gas inlet 6 and extends along the diameter of said injector holder 4.
- cup-shaped depressed zones are also provided, i.e. closed both on their base and laterally, and open upwards; in particular, a central cup 10 and two lateral cups 12 and 12' are provided.
- a first injector 14 is provided, which is disposed vertically and is in communication via the conduit 8 with the gas inlet 6.
- a second injector 16 and a third injector 18 are provided respectively, which are also disposed vertically and are in communication via the conduit 8 with the gas inlet 6.
- the injector holder 4 On its circumferential surface, the injector holder 4 presents a flange 20 provided with widened zones in which seats 22 are provided, required to fix the injector holder 4 by screws to the upper sheet metal of a cooking hob, not shown. On the injector holder 4 a flame divider 24 rests provided with appendices 26, which facilitate positioning and centring of this latter relative to the injector holder.
- the flame divider 24 presents a central portion 28 surrounded by an outer annular portion 30; in particular, the bases of said portions are connected together by a flange 32 forming the bottom of an annular cavity 34.
- the flame divider 24 is supported by raised portions 36 and 38 defined on the injector holder 4 and consisting of the upper prolongations of the lateral walls respectively of the two outer cups 12 and 12' and of the central cup 10. In this manner, between the flame divider 24 and the injector holder 4, passages are defined for the air drawn from above the cooking hob.
- first slots 40 are provided for entry of primary air 41 into the two outer cups 12 and 12', and second slots 42 for entry of primary air 43 into the central cup 10; in addition, between the bottom of the flame divider 24 and the injector holder 4, openings 44 are provided for entry of secondary air 45 into the annular cavity 34 for the central flame ring 80 and for the inner annular flame ring 82.
- the openings 44 define connection passages between the annular cavity 34 of the flame divider and the space surrounding the burner, above the cooking hob.
- the central portion 28 of the flame divider 24 is provided centrally with a through vertical conduit 46 facing the injector 14 positioned in the central cup 10 and of upwardly converging frusto-conical shape. It opens into a cylindrical distribution chamber 48 of reduced height.
- the outer annular portion 30 of the flame divider 24 is instead provided with two conduits 50 which face the injectors 16 and 18 and enter an annular distribution chamber 52 provided in the annular portion itself.
- the central portion 28 of the flame divider 24 is provided on its upper edge with a plurality of first radial recesses 64, while the annular portion 30 is provided with a plurality of second radial recesses 66 and 68, defined respectively at the outer upper edge 70 and at the inner upper edge 72 of the annular distribution chamber 52.
- a circular closure cover 74 is rested on the central portion 28 of the flame divider 24 and upperly defines the recesses 64, while an annular closure cover 76 is rested on the annular portion 30 and upperly defines the recesses 66 and 68.
- the upper end of the venturi conduits 50 projects and emerges from the base 53 of the annular distribution chamber 52.
- This is particularly advantageous in that it enables particularly lengthy vertical venturi conduits to be provided, in order to achieve optimal mixing of gas and primary air, while at the same time enabling a reduced overall height of the burner to be maintained.
- the fact that the upper end of the venturi conduits 50 is positioned at a level above the base 53 of the annular chamber 52 prevents any water which might spill over from a pan during cooking from entering the annular chamber 52 and from there arriving to obstruct the injector and/or enter the inner cavity of the cooking hob, where it could damage electrical circuits or other components.
- the lower end 60 of each conduit 50 is at a slightly higher level than the upper edge 62 of the injector holder 4, this facilitating draw-in of primary air for mixing.
- the two lateral conduits 50 are configured such that air and gas flow which leaves them and enters the annular distribution chamber 52 is substantially already completely mixed.
- the height of the annular chamber 52 is greater than one half the radius of the lateral conduit 50 at its upper end.
- each conduit 50 presents in sequence a convergent lower frusto-conical portion 54 of diameter at its lower end substantially between 11 and 12 mm and serves to convey the air and gas into a substantially cylindrical intermediate portion 56.
- This has a diameter substantially between 8 and 9 mm and defines a constriction which serves to accelerate the air/gas mixture; this mixture then opens into the divergent upper frusto-conical portion 58, having an upper diameter substantially between 10 and 11 mm, which causes the mixture to expand.
- the distance between the upper end of the venturi conduits 50 and the lower face of the annular cover 76 is substantially between 3 and 4 mm, preferably about 3.5 mm; essentially the passage between the outlet section of the venturi conduit 50 and the inlet section of the annular chamber 52 increases such that the mixture continues to expand, without hindrance, within the annular chamber itself.
- the flame divider 24 is provided with centring fins 78 in order to enable unique positioning of the annular cover 76 relative to the annular portion 30 of the flame divider.
- the burner single-exit control valve When in its operative state, the burner single-exit control valve, not shown, is open and consequently the gas reaches the three injectors 14, 16 and 18.
- the gas leaving the injector 14 draws in, from the top of the cooking hob, a flow of primary air 43 which passes through the slots 42 to enter the central cup 10 and from there is drawn along the frusto-conical vertical conduit 46 causing the air and gas to mix.
- the air and gas flow reaches the distribution chamber 48 their mixing is already complete; the mixture thus formed then leaves the central portion 28 through the radial recesses 64 to generate a central flame ring 80.
- the gas that leaves the injectors 16 and 18 draws in, from the top of the cooking hob, a flow of primary air 41 which passes through the passages 40 to enter the respective cups 12 and 12' and from there is drawn along the conduits 50, to mix with the gas.
- a flow of primary air 41 which passes through the passages 40 to enter the respective cups 12 and 12' and from there is drawn along the conduits 50, to mix with the gas.
- the secondary air 45 for igniting and maintaining the flames which form the central ring 80 and the inner annular ring 82 originates from the top of the cooking hob and enters the annular cavity 34 through the openings 44, while the secondary air for igniting and maintaining the flames which form the outer annular ring 84 originates from the environment surrounding the burner 2.
- FIG. 5 and 6 represents an improved gas burner 86 according to the invention in the dual version, i.e. in the version with the flame rings fed separately by two gas sources which are regulated independently.
- an injector holder 88 comprising two gas inlets 90, 92 with which a traditional two-exit valve is associated (dual).
- the upper end of the venturi conduits 50 projects and emerges from the base 53 of the annular distribution chamber 52.
- the two lateral conduits 50 are configured such that the air and gas flow, which emerges therefrom and enters the annular distribution chamber 52, is substantially already completely mixed.
- the height of the annular chamber 52 is greater than one half the radius of the lateral conduit 50 at its upper end.
- the burner 86 presents a first gas inlet 90 facing a first conduit 94 communicating with the lateral injectors 16 and 18, and a second gas inlet 92 facing a second conduit 96 communicating with the central injector 14.
- the first conduit 94 extends along the diameter of said injector holder 88, while the second conduit 96 has a length substantially equal to one half of said diameter and is disposed perpendicularly to and at a level slightly above the first conduit 94.
- the annular portion 30 could also not present inner radial recesses 72; in that case there would be no annular ring of inwardly direct flames 82, and there would be only two flame rings, namely the central flame ring 80 and the annular flame ring 84 with flames directed outward.
- the improved gas burner according to the invention is more advantageous than traditional burners, in that: - as it is composed of only four parts (injector holder, flame divider and two closure covers) it is quick and particularly cheap to produce; in particular, the fact that the flame divider is formed in a single piece, and the fact that the closure cover of the annular portion is produced by cold pressing sheet metal, contribute to reducing the overall burner production costs,
- annular cavity is defined such as to enable an annular ring of inner flames of regular shaped to be generated
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL14733301T PL3004737T3 (en) | 2013-05-29 | 2014-05-28 | Improved gas burner |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000027A ITVE20130027A1 (en) | 2013-05-29 | 2013-05-29 | PERFECTED GAS BURNER. |
PCT/IB2014/000901 WO2014191825A1 (en) | 2013-05-29 | 2014-05-28 | Improved gas burner |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3004737A1 true EP3004737A1 (en) | 2016-04-13 |
EP3004737B1 EP3004737B1 (en) | 2016-09-21 |
Family
ID=48877482
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14733301.7A Active EP3004737B1 (en) | 2013-05-29 | 2014-05-28 | Improved gas burner |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP3004737B1 (en) |
BR (1) | BR112015029887B1 (en) |
ES (1) | ES2608361T3 (en) |
IT (1) | ITVE20130027A1 (en) |
MX (1) | MX365461B (en) |
PL (1) | PL3004737T3 (en) |
RU (1) | RU2650455C2 (en) |
WO (1) | WO2014191825A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023101634A1 (en) * | 2021-11-30 | 2023-06-08 | Turaş Gaz Armatürleri̇ San. Ve Ti̇c. A.Ş. | A multi-gas burner for increasing efficiency |
WO2023152652A1 (en) * | 2022-02-11 | 2023-08-17 | E.G.O. Elektro-Gerätebau GmbH | An improved gas burner |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106287694B (en) * | 2016-08-12 | 2019-02-01 | 宁波市胜源技术转移有限公司 | A kind of tricyclic gas apparatus of gas-cooker |
CN106322377B (en) * | 2016-08-12 | 2019-02-01 | 宁波市胜源技术转移有限公司 | A kind of Bidirectional detachable gas apparatus |
CN106152130B (en) * | 2016-08-12 | 2018-11-16 | 宁波市鄞州姜山盛旺五金厂 | A kind of two-way combination type burner |
CN106287695A (en) * | 2016-08-12 | 2017-01-04 | 宁波市鄞州姜山盛旺五金厂 | A kind of unilateral formula gas apparatus and preparation method thereof |
CN106322375B (en) * | 2016-08-12 | 2018-09-14 | 宁波市鄞州姜山盛旺五金厂 | A kind of reversible burner |
CN106439806A (en) * | 2016-08-12 | 2017-02-22 | 宁波市鄞州姜山盛旺五金厂 | Combined-type burner |
CN106196048A (en) * | 2016-08-12 | 2016-12-07 | 宁波市鄞州姜山盛旺五金厂 | A kind of convergent current type gas apparatus and preparation method thereof |
EP3425276B1 (en) | 2017-07-07 | 2022-06-01 | Electrolux Appliances Aktiebolag | Cooking hob comprising a gas burner |
CN110529850A (en) * | 2018-05-23 | 2019-12-03 | 宁波方太厨具有限公司 | A kind of upper inlet wind type burner |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1232887B (en) | 1989-07-27 | 1992-03-05 | Merloni Elettrodomestici Spa | GAS BURNER FOR COOKING FOOD |
RU2295090C2 (en) * | 2002-11-12 | 2007-03-10 | Сабаф С.П.А. | Gas burner at separate supply of flame coronas |
AU2002358969B2 (en) | 2002-11-12 | 2009-05-21 | Sabaf S.P.A. | Gas burner with separate feeding of the flame crowns |
ITMC20040024A1 (en) | 2004-02-13 | 2004-05-13 | So Mi Press Societa Metalli In | DOUBLE BURNER FOR GAS COOKERS, OF THE TYPE WITH MULTIPLE CONCENTRIC CROWNS OF FLAMES |
ITTO20040794A1 (en) * | 2004-11-12 | 2005-02-12 | Merloni Elettrodomestici Spa | GAS BURNER SYSTEM FOR COOKING FOODS OF PERFECT TYPE |
US20100279238A1 (en) * | 2009-05-02 | 2010-11-04 | Uwe Harneit | Gas burner |
MX345335B (en) * | 2009-12-18 | 2017-01-25 | Mabe S A De C V * | Triple flame section burner. |
IT1400182B1 (en) * | 2010-05-19 | 2013-05-17 | Defendi Italy Srl | GAS BURNER WITH MORE FLAME CHAINS. |
-
2013
- 2013-05-29 IT IT000027A patent/ITVE20130027A1/en unknown
-
2014
- 2014-05-28 ES ES14733301.7T patent/ES2608361T3/en active Active
- 2014-05-28 PL PL14733301T patent/PL3004737T3/en unknown
- 2014-05-28 MX MX2015016409A patent/MX365461B/en active IP Right Grant
- 2014-05-28 EP EP14733301.7A patent/EP3004737B1/en active Active
- 2014-05-28 BR BR112015029887-7A patent/BR112015029887B1/en active IP Right Grant
- 2014-05-28 WO PCT/IB2014/000901 patent/WO2014191825A1/en active Application Filing
- 2014-05-28 RU RU2015153744A patent/RU2650455C2/en active
Non-Patent Citations (1)
Title |
---|
See references of WO2014191825A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023101634A1 (en) * | 2021-11-30 | 2023-06-08 | Turaş Gaz Armatürleri̇ San. Ve Ti̇c. A.Ş. | A multi-gas burner for increasing efficiency |
WO2023152652A1 (en) * | 2022-02-11 | 2023-08-17 | E.G.O. Elektro-Gerätebau GmbH | An improved gas burner |
Also Published As
Publication number | Publication date |
---|---|
MX365461B (en) | 2019-06-04 |
RU2650455C2 (en) | 2018-04-13 |
BR112015029887B1 (en) | 2021-08-31 |
RU2015153744A (en) | 2017-06-20 |
MX2015016409A (en) | 2016-05-18 |
EP3004737B1 (en) | 2016-09-21 |
BR112015029887A2 (en) | 2017-07-25 |
PL3004737T3 (en) | 2017-05-31 |
ITVE20130027A1 (en) | 2014-11-30 |
WO2014191825A1 (en) | 2014-12-04 |
ES2608361T3 (en) | 2017-04-10 |
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