EP1910742A1 - Gas burner with multiple concentric flame rings - Google Patents

Gas burner with multiple concentric flame rings

Info

Publication number
EP1910742A1
EP1910742A1 EP20060794239 EP06794239A EP1910742A1 EP 1910742 A1 EP1910742 A1 EP 1910742A1 EP 20060794239 EP20060794239 EP 20060794239 EP 06794239 A EP06794239 A EP 06794239A EP 1910742 A1 EP1910742 A1 EP 1910742A1
Authority
EP
Grant status
Application
Patent type
Prior art keywords
central
gas
pot
head
characterized
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
EP20060794239
Other languages
German (de)
French (fr)
Other versions
EP1910742B1 (en )
Inventor
Christophe c/o Burner Systems Int. TROCHOU (BSI)
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.)
SOCIETE NOUVELLE SOURDILLON
Original Assignee
Burner Systems Int Bsi
Burner Systems International (BSI)
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

Links

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
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46Details, e.g. noise reduction means
    • F23D14/62Mixing devices; Mixing tubes
    • F23D14/64Mixing devices; Mixing tubes with injectors
    • 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 invention concerns a gas burner (1) with multiple concentric flame rings, comprising: a central burner (2) with a central ring of flame orifices (5), an axial central gas injector (6) and convergent-divergent means (7) forming venturi; and an annular outer burner (3) coaxially surrounding the central burner and provided with at least one annular ring of flame orifices (9), gas injecting means (10) and convergent-divergent means (12) forming venturis; the gas injecting means (10) include several radial gas injectors (11) around the central injector (6); the convergent-divergent means (12) include several radial convergent-divergent conduits (13) forming tubular venturis coaxial respectively to the radial injectors (11) and emerging in the annular outer burner.

Description

BURNER GAS FLAME CROWNS Â MULTIPLE CONCENTRIC

The present invention relates to the field of gas burners with multiple concentric flame rings, and it relates more specifically to improvements to those of these burners, which include:

- a central burner with a central crown of flame ports, an injector axial central gas to said central burner, and the convergent-divergent venturi means interposed between the central nozzle and the central ring of flame orifices, and

- an annular outer burner coaxially surrounding said central burner and provided with at least one annular ring of flame holes, gas injection means for the annular outer burner, and the convergent-divergent venturi means interposed between the means gas injection and the annular ring of flame orifices, and

- means for supplying gas to said axial central injector and said injection means.

We already know of the type of gas burner, in particular from PCT / FR04 / 00158 in the name of the Applicant.

These known burners have the drawback that the annular burner is supplied with air-gas mixture in one location of its circumference, so that its operation is not optimal.

The invention aims to provide a gas burner of this type that is more efficient in energy terms, that is to say more powerful to substantially identical dimensions, while being structurally simple and easy to manufacture and to assemble.

For these purposes, a gas burner with multiple concentric flame rings as mentioned in the preamble is characterized, being arranged according to the invention,

- in that said gas injection means to the outer annular burner comprises a plurality of gas injectors disposed substantially radially about the nozzle axial central gas, and

- in that the convergent-divergent means comprise at least two substantially radial ducts convergent-divergent forming tubular venturis substantially radial respective extended and opening into the annular external burner, said ducts s ​​substantially coaxially respectively extending said radial injectors.

With this arrangement, it is possible to bring the annular burner a high flow rate of air-gas mixture distributed in several places of its circumference, so that its operation is optimized in relation to the prior arrangement ..

Such an arrangement allows complete freedom as to the choice of gas supply mode. A first possibility of mounting is that said gas supply means comprises a single centrally located manifold and connected to all injectors: the burner is then provided with a single gas supply having a single control (single tap) feeding simultaneously the central burner and the outer annular burner. But it is also possible that said gas supply means comprises a first tube connected to the injector axial central gas and a second tube connected to the lateral gas injectors: each of. central burner and the outer annular burner has its own gas supply with its own control (two respective valves), so that it is possible to achieve a differentiated heating in the center and the periphery (WOK kitchen).

In a preferred embodiment, the burner comprises a central baseplate arranged coaxially with the central burner and in that said base comprises. a substantially coaxial central bore upwards and suitable for receiving the aforesaid injector axial central gas, and at least two substantially radial lateral bores laterally opening being adapted to receive respectively the at least two lateral gas injectors arranged substantially radially.

It is then possible to arrange the base according to the selected gas supply type: in the case of a common power supply of the two central and annular outer burner, it is anticipated that at least two substantially radial lateral bores of the base are in communication with the central bore and that the base further comprises a communication connecting bore with the lower end of the central bore and adapted to receive the end of a gas supply tube ; in the case of two separate power supplies, it is anticipated that the base comprises a first communication connection bore with the central bore and adapted to receive the end of a first gas supply pipe and a second connecting bore in communication with the aforesaid lateral bores and adapted to receive the end of a second supply pipe of the gas. To keep the burner generally sufficiently flat configuration, it is desirable that the convergent-divergent venturi forming tubular conduits are upwardly inclined towards the outside.

In this case, it is advantageous that the base is, at least in its upper part, substantially generally frustoconical shape with a conicity such that the lateral gas injectors are inclined in substantially coaxial respectively to being convergent-divergent conduits forming tubular venturis .

It is desirable to obtain a smooth operation, the convergent-divergent conduits forming tubular venturis are angularly distributed substantially equidistant. Advantageously, these convergent-divergent conduits forming tubular venturis are in number between 2 and 5, and preferably in practice the number of three mutually angularly spaced about 120 °.

In an exemplary practical embodiment, the annular outer burner comprises two annular rings of respectively inner and outer flame orifices.

Concretely also, the convergent-divergent venturi forming means interposed between the central nozzle and the central ring of flame ports comprise a radial annular divergent surrounding a coaxial central shaft to the central injector, so that, in conjunction with tubular convergent-divergent radial extent of feeding annular outer burner, it is able to realize a gas burner with multiple concentric flame rings that is of relatively low height. Typically, a gas burner arranged as just described may have a power of the order of 7 kW approximately maintaining the transverse dimensions of an existing burner with a power of about 5 kW.

Another advantage of the burner arranged according to the invention lies in the possibility to maintain a structural conformation similar to that of prior burners with a limited number of component parts, such a burner comprising:

- a lower component part or clean pot to be fixed to a top plate of a cooking apparatus substantially coaxially with an opening of said top plate,

- an upper component part or head comprising a delimited central portion peripherally by an indented sidewall defining flame openings to form the abovementioned central flame crown and a substantially coaxial annular portion to said central portion and defined by at least one sidewall indented defining flame openings to form the aforementioned annular flame crown,

- a central cap of substantially discoid shape capable of capping said central portion, and

- an own annular cap for covering said annular portion.

In this case, the burner arranged in accordance with the invention is characterized in that

- the pot comprises a centrally arranged central area for supporting the injector axial and radial injectors, and - at least the pot and / or the head comprises at least two radiating gutters that extend from said central area or respectively said central portion where they open out and to the outer edge of the pot or respectively to the annular part with which they communicate, said channels being closed by the head respectively or the pot in the assembly position of said pot and head to form said convergent-divergent conduits forming tubular venturis substantially radial extent.

In this case, according to a preferred embodiment, provision is made:

- the pot comprises at least two radiating gutters that extend from said central area and which are open respectively to the top,

- the head comprises at least two radiating troughs which extend from said central portion and which are open respectively downwards, and

- the pot gutters and eaves of the head are superimposed in pairs, in the assembly position of said pot and head to constitute said convergent-divergent conduits forming tubular venturis substantially radial extent.

The pot design can, in turn, give rise to two possible embodiments according to the general design of the cooking apparatus.

A first design is that the pot has a solid structure and in that at least the pot and / or the head comprises at least two substantially radial grooves, interposed between said gutters which extend between said lead-through being central area and the outer edge of the pot or the head respectively, these grooves being respectively closed by the head or the pot in the assembly position of said pot and head to form extended passages generally radially, to ensure supply primary air from above the top plate of the cooking appliance. In this case, it is advantageous to provide that:

- the pot comprises at least two substantially radial grooves, which are interposed between said gutters and which open substantially upwardly,

- the head comprises at least two substantially radial grooves, which are interposed between said gutters and which open substantially downwards,

- the grooves of the pot and the top of the grooves are superimposed in pairs, in the assembly position of said pot and head to constitute said feed passages in primary air.

Another design consists in that the pot has a structure which is perforated at least partially between the gutter and which is suitable for providing primary air supply from below the top plate of the cooking appliance.

Advantageously in this case, the pot gutters extend to below the annular head portion and the annular portion of the head has a bottom which is provided with openings opposite to the ends located radially outwardly of said pot gutters .

In the case where the injectors are supported on a common base as described above, it is interesting that the central pot range has a central opening through which said injector support base is engaged by the underside of the pot, with its part tronconigue upper projecting above said central area and with its lower portion underlying the pot, said bottom portion being provided with the or connecting bores.

To facilitate the mutual guidance of the pot and the head during their assembly and also ensure their mutual locking in rotation once assembled, is advantageously made for the pot and / or the head has disposed pairs of projecting fingers of hand and other respective gutters and adapted to receive the corresponding gutters of the head respectively and / or the pot.

In the preferred practical arrangement mentioned above, it is expected that the pot and / or the head has three substantially radial gutters spaced apart angularly by about 120 ° and three substantially radial grooves interposed between said gutters.

The invention will be better understood from reading the following detailed description of certain preferred embodiments given by way of non-limiting examples. In this description, reference is. refers to the accompanying drawings in which:

- Figure 1 is an overall view, in side perspective, of a possible embodiment of a multi-gas burner flame crowns arranged according to the invention;

- Figure 2 is a diametral sectional view of the burner of Figure 1;

- Figure 3 is a sectional view of a first embodiment of a burner of the workpiece of Figures 1 and 2;

- Figure 4 is an exploded perspective view from above of the burner of Figs 1 and 2; - Figure 5 is an exploded perspective view from below of the burner of Figs 1 and 2;

- Figures 6A, 6B and 6C illustrate a second embodiment of the part of the burner shown in Figure 3, respectively in top view and sectional views along the lines BB and CC of Figure 6A; and

- Figure 7 illustrates a pot embodiment of the burner according to the invention shown in a representation similar to that of the pot shown on Figure 4, but with a different angular orientation.

Referring firstly to Figures 1 to 3, a gas burner with multiple concentric flame rings, generally designated by reference 1, to which the invention essentially comprises two elementary gas burners nested in each other, namely a central burner 2 and an annular outer burner 3 coaxially surrounding said central burner 2.

The central burner 2 comprises:

- a central burner body 4 having a central crown of flame orifices 5,

- 6 an axial central gas injector disposed substantially coaxially with said central body of the burner 4, and

- converging-diverging venturi forming means 7 which are interposed between the central injector 6 and the central ring of flame orifices 5.

The annular outer burner 3 coaxially surrounding said central burner 2 comprises:

- an annular outer burner body 8 having at least one annular ring of flame orifices 9 inner and / or outer (in the figures 1 to 5, there are provided two crowns of flames, respectively internal and external 9i 9e),

- gas injection means 10 which include a plurality of gas injectors 11 disposed substantially radially about the nozzle axial central gas 6, and

- converging-diverging venturi forming means 12 interposed between the gas injection means 10 and the annular ring of flame orifices 9, which convergent-divergent means 12 comprise at least two conduits 13 convergent-divergent substantially radial forming tubular venturis scopes respective substantially radial and opening into the body of annular external burner 8, said convergent-divergent conduit 13 s substantially coaxially respectively extending said radial injectors 11.

Finally, the burner 1 comprises means 14 for supplying gas to said central axial injector 6 and said injection means 10, means 14 for supplying gas which will be more specifically described now.

The arrangement just described allows complete freedom as to the choice of gas supply mode. A first possibility of mounting is that said gas supply means comprise a single manifold located substantially centrally and connected to all injectors: the burner is then provided with a single gas supply having a single control (single tap) simultaneously feeding the central burner and the outer annular burner. But it is also possible that said gas supply means comprises a first tube connected to the injector axial central gas and a second tube connected to the lateral gas injectors: each of the central burner and the outer annular burner has its own power supply gas with its own control (two respective valves), so that it is possible to achieve a differentiated heating in the center and the periphery (WOK kitchen).

In this context, for simplifying both the structure of the burner and the assembly of its constituent parts, it is advantageous for the means 14 of gas supply comprises a base 16 coaxially disposed central to the central burner 2 and arranged to support all the gas injectors in their proper respective situations. To this end, it is expected that this base 14 comprises, as shown in Figure 3 and Figures 6A-6C:

. a central bore 15 substantially coaxial opening upwards and suitable for receiving the aforesaid injector axial central gas 6, and

. at least two substantially radial bores 18 opening laterally into side being adapted to respectively receive the at least two lateral gas injectors 11 arranged substantially radially.

It is then possible to arrange the base 16 according to the selected gas supply kind. In the case of a common power supply of the two central burners 2 and outer ring 3, there is provided, as shown in Figure 3, that substantially all radial lateral bores 18 are in communication with the central bore 15 and the base 16 further comprises a connecting bore 17 in communication with the lower end of the central bore 15 and adapted to receive the end of a supply tube of the gas (not shown). The two central burners 2 and outer ring 3 are then simultaneously controlled from a single valve (not shown). Another possible arrangement of the base 16 will be explained below with reference to Figures 6A-6C.

It is emphasized here that the base 16 is shown in Figure 3 in two cutting planes offset angularly so that its upper portion is cut in the axis of a lateral bore 18 and its lower part is cut in the axis of the bore 17 for connecting a delivery tube gas. In addition, in Figure 2, only one injector 11 is shown in position on the base 16, while the other nozzle is not mounted and reveals the corresponding bore 18.

To drive the gas-air mixture to the annular external burner 8 which is located substantially above the radial injectors 11, it is desirable to avoid cranked paths to reduce pressure losses. Under these conditions, it is advantageous that the convergent-divergent conduits 13 forming tubular venturis are inclined upwardly toward the outside as shown in Figure 2. Each conduit 13 is then substantially rectilinear. In this context, the burner design can be simplified by providing that the base 16 is, at least in its upper part, substantially generally frustoconical shape with a conicity such that the lateral gas injectors 11 are inclined in substantially coaxial respectively the convergent-divergent conduits 13 forming tubular venturis.

In addition, as best seen in Figure 2, the convergent-divergent conduits 13 reach under the body of annular burner 8, which has a bottom 19 which is provided with openings 20 in correspondence with the ends of the conduits for the passage of air / gas mixture.

To obtain a homogeneous supply to the entire annular outer burner 3, it is desirable that the convergent-divergent conduits 13 forming tubular venturis are angularly distributed substantially equidistant. In practice, a design and an easy manufacture of the burner is obtained when the convergent-divergent conduits 13 forming tubular venturis are in number between 2 and 5. An interesting compromise is that the convergent-divergent conduits 13 are the number of three mutually angularly spaced about 120 °, as illustrated in FIGS.

With the configuration adopted in accordance with the invention, the operation of the annular outer burner 3 and the operation of the central burner 2 remain substantially independent of each other, since each of them has its own supply means air-gas mixture. Therefore, the central burner 2 may be arranged in any suitable desirably needs. In particular, in order to design a burner 1 of low height, it is advantageous that the convergent-divergent venturi forming means 7 interposed between the central injector 6 and the central flame crown 5 comprises a diverging radial annular defined by a tray 21 inclined downwards towards the outside and surrounding a central shaft 22 coaxial with the central nozzle 6 and a facing face 24 of a cap covering central burner 23 of the body 4, as shown in Figure 2 .

It is desirable that the burner according to the invention maintains a simple structure, being made up with a minimum number of component parts. From this perspective, it is interesting that it can be formed in a manner similar to the burner described in PCT / FR04 / 00158 cited above. To this end, it is anticipated that the burner described above includes, as best seen in Figures 3, 4 and 5:

- a lower component part or pot 25 suitable for being fixed to a top plate 26 of a cooking apparatus substantially coaxially with an opening 27 provided in said top plate 26;

- an upper component part or head 27 comprising: a central portion central burner of the aforesaid body 4 delimited peripherally by a lateral wall 28 notched at 29 to define, in conjunction with the aforesaid central cap 23, openings of flames together constituting the abovementioned central flame crown 5, and an annular portion substantially coaxial with said central portion and forming the said body of annular external burner 8, the annular portion being defined by at least one sidewall 30 indented in 31 defining, in conjunction with a cap ring 32, the openings of flames assembly constituting the aforesaid annular flame crown 9 (in the example shown, the annular portion is delimited by two respectively inner and outer side walls 3Oi 30e notched respectively 3II and 31e defining, in conjunction with the annular cap 32, fl openings ames respectively constituting the two annular rings of flames 9i and 9e; - the aforesaid central cap 23 of substantially discoidal shape capable of capping said central portion, and

- the aforesaid annular cap 32 adapted for covering said annular portion.

In accordance with the arrangement according to the invention there is provided the following:

- the pot 25 includes a central area 33 adapted to centrally support the axial injector 6 and the radial injectors 11, and

- at least the pot 25 and / or the head 27 comprises at least two channels 34 which extend radiating from said central area 33 or respectively said central burner body forming a central part 4 where they open out to the edge and outside of the pot 25 or respectively to the annular portion annular burner body 8 with which they communicate, said channels 34 being respectively closed by the head 27 or the pot 25 in the assembly position of said pot and head to form said convergent-divergent conduits 13 forming tubular venturis substantially radial extent.

A simple way to implement the provisions that have just been explained is that:

- the pot 25 comprises at least two radiating gutters 34i extending from said central area 33 and which are open respectively upwardly,

- the head 27 comprises at least two radiating gutters 34s which extend from said central portion 4 and which are open respectively downwards, and - 34i gutters pot and 34s gutter head are superimposed in pairs in the assembly position of said pot and head to constitute said convergent-divergent conduits 13 forming tubular venturis substantially radial extent.

In this context, it is possible to design the pot in two possible realizations leading to two different modes of operation respective burner depending on the design of the cooking appliance.

A first embodiment is, as shown in Figures 1, 2, 4 and 5, in that the pot has a solid structure and in that:

- at least the pot 25 and / or the head 27 comprises at least two substantially radial grooves 35, interposed between said gutters 34, which extend by being lead-through between said central area 33 and the outer edge of the pot 25 or respectively the head 27, these grooves 35 being closed by respective head 27 or the pot 25 in the assembly position of said pot and head to provide passages 36 generally radially own extended to ensure the supply of primary air from above the top plate 26 of the cooking apparatus.

a burner is thus formed in which the primary air necessary for the operation of the two central annular burners 2 and outer 3, respectively, is fed from above the top plate of the cooking appliance.

In the preferred specific arrangement shown in Figures 1, 2, 4 and 5, are used with the following provisions: - the pot 25 has at least two grooves 35i substantially radial, which are interposed between said gutters 34i and s substantially open upwardly,

- the head 27 comprises at least two substantially radial grooves 35s, which are interposed between said gutters and 34s which open substantially downwards, and

- the grooves 35i and 35s of the pot grooves of the head are superimposed in pairs, in the assembly position of said pot and head to constitute said passages 36 for feeding primary air.

A second approach involves, as illustrated in Figure 7 (wherein like reference numerals are used to denote the components or parts identical to those corresponding to FIG 4), in that the pot 25 has a structure which is perforated in 41 at least partially between the gutters 34i. This structure is suitable for providing primary air supply of the two central annular burners 2 and 3 outside from the underside of the top plate of the cooking appliance.

Regardless of the design of the pot, as best seen in Figures 2 and 4 the pot 34i gutters 25 extend to below the annular portion of the head 27 and the annular portion of the head 27 has its base 19 which is provided of said openings 20 facing the ends located radially outwardly of said 34i gutters 25 of the pot.

For mounting of burners, the central area 33 of the pot 25 has, as shown in Figure 2, a central opening 37 through which said base 16 for supporting the injector is engaged by the underside of the pot 25, with its upper frusto-conical portion projecting above said central area 33 and with its lower portion underlying the pot, said bottom portion being provided with said own bore 17 to receive the end of a gas feed tube.

In the specific embodiment illustrated in Figures 2, 4 and 5, pot 25 and / or the head 27 has three gutters 34i respectively, substantially radial 34s spaced apart angularly by about 120 ° and three respectively grooves 35i, 35s substantially radial interposed between said gutters.

As best seen in Figures 4 and 5, the implementation of the provisions which have been exposed to lead a pot 25 to solid structure, while the head 27 comes with an open structure, with gutters and 34s 35s grooves constituting mechanically connecting beams the central portion to the annular portion.

To ensure correct mutual angular positioning of the pot 25 and the head 27 superposed, means are provided for guiding and blocking in rotation, which in the example shown, comprise pairs of fingers 38 carried for example by the pot 25 and vertically upwardly projecting, being arranged on either sides of respective gutters 34i. When mounting head 27, the gutters 34s are interposed each between two fingers 38 in vis-à-vis. Naturally, a reverse arrangement could be adopted, with the projecting fingers carried by the share of head side of the gutters 34s.

It is emphasized that an electric ignition electrode 39 and / or a thermocouple 40 of the presence of flame detection may, if desired, be installed in the burner 1, in any suitable location thereof; for example, the ignition electrode 39 and the thermocouple 40 are shown the outer edge of the pot 25 in Figure 5, while they are shown in a central position in the pot 25 and at different locations of the -ci to figures 2 and 4.

If it is desired to have two separate supplies of the two central annular burners 2 and outer 3 respectively, are provided, as shown in Figures 6A-βC, the base 16 includes a first connecting hole 17 in communication with the bore central 15 and adapted to receive the end of a first feed gas tube (not shown) and a second connecting bore 44 in communication with the aforesaid lateral bores 18 and adapted to receive the end of a second tube feed gas (not shown).

In the design of the base 16 illustrated by way of example in FIGS 6A-6C 1 is provided, as best seen in Figure 6B, the axial central bore 15 receiving the axial central injector 6 of the central burner 2 is connected by a channel 42 offset laterally to the connecting hole 17 which, here, is laterally located at the base of the base 16 and is non-radial extent.

For their part, the bores 18 of the radial injectors 11 of the annular outer burner 3 are connected by a channel 43 located axially at a second connecting bore 44 which also here, is laterally located at the base of the base 16 and is substantially radially extending.

Thus arranged, the base 16 is a relatively complex piece with many holes opening some of which must then be sealed (cap 45) to provide the appropriate channels.

Claims

1. Gas burner (1) with multiple concentric flame rings, comprising:
- a central burner (2) with a central ring of flame ports (5), a central gas injector
(6) for said axial central burner, and the convergent-divergent means (7) forming a venturi interposed between the central injector (6) and the central ring of flame ports (5), and
- an annular outer burner (3) coaxially surrounding said central burner (2) and provided with at least one annular ring of flame orifices (9), gas injection means (10) for the outer annular burner ( 3), and convergent-divergent means (12) forming a venturi interposed between the gas injection means (10) and the annular ring of flame orifices (9), and
- means (14) gas supply to said central injector (6) and said axial gas injection means (10), characterized
- in that said gas injection means (10) to the annular outer burner (3) comprises a plurality of gas injectors (11) arranged substantially radially around the central gas injector (6) axially, and
- in that the convergent-divergent means (12) comprise at least two convergent-divergent conduit (13) forming substantially radial substantially radial respective extended tubular venturi and opening into the annular outer burner (3), said convergent-divergent conduits (13) s substantially coaxially respectively extending said radial injectors (11).
2. Gas burner according to Claim 1, characterized in that said means (14) for supplying gas comprises a single centrally located manifold and connected to all injectors (6, 11).
3. Gas burner according to claim 1, characterized in that said means (14) of gas supply comprises a first tube connected to the injector axial central gas (6) and a second tube connected to the lateral gas injectors (11).
4. Gas burner according to any one of claims 1 to 3, characterized in that it comprises a central base (16) arranged coaxially with the central burner (2) and in that this base (16) comprises:
. a central bore (15) substantially coaxial opening upwardly and adapted to receive the injector aforesaid axial central gas (6), and
. at least two lateral bores (18) substantially radial opening laterally in being adapted to respectively receive the at least two lateral gas injectors (11) arranged substantially radially.
5. A gas burner according to claims 2 and 4, characterized in that the at least two lateral bores (11) substantially radial of the base are in communication with the central bore (15) and in that the base comprises Furthermore, a connecting bore (17) in communication with the lower end of the central bore (15) and adapted to receive the end of a supply tube of the gas.
6. Gas burner according to claims 3 and 4, characterized in that the base includes a first connecting bore (17) in communication with the central bore (15) and adapted to receive the end of a first tube gas supply and a second connecting bore (44) in communication with the aforesaid lateral bores (11) and adapted to receive the end of a second gas supply tube.
7. Gas burner according to one of claims 1 to 6, characterized in that the convergent-divergent tubular ducts (13) forming venturis are upwardly inclined towards the outside.
8. A gas burner according to any one of claims 4 to 6 and claim 7, characterized in that the base (16) is, at least in its upper part, substantially generally frustoconical shape with a conicity such that lateral gas injectors (11) are inclined in substantially coaxial respectively to conduits being convergent-divergent (13) forming tubular venturis.
9. Burner for gas according to any one of claims 1 to 8, characterized in that the convergent-divergent conduit (13) forming tubular venturis are angularly distributed substantially equidistant.
10. Gas burner according to any one of claims 1 to 9, characterized in that the convergent-divergent conduit (13) forming tubular venturis are in number between 2 and 5.
11. A gas burner according to claim 10, characterized in that the convergent-divergent conduit (13) forming tubular venturis are three in number mutually angularly spaced about 120 °.
12. Gas burner according to any one of claims 1 to 11, characterized in that the annular outer burner (3) comprises two annular rings of flame orifices (9i, 9e) inner and outer respectively.
13. Gas burner according to any one of claims 1 to 12, characterized in that the convergent-divergent means (7) interposed between venturis forming the central injector (6) and the central ring of flame ports (5 ) comprises a divergent annular radial (21, 24) surrounding a central well (22) coaxial with the central nozzle (6).
14. A gas burner according to any one of claims 1 to 13, comprising:
- a lower pot or component (25) suitable for being fixed to a top plate (26) of a cooking apparatus substantially coaxially with an opening (27) of said top plate (26),
- an upper component part or head (27) comprising a central portion (4) peripherally bounded by a side wall (28) indented
(At 29) to form the abovementioned central ring of flame ports (5) and an annular portion (8) substantially coaxial with said central portion (4) and delimited by at least one side wall (30) notched (at 31) to form the said annular ring of flame orifices (9),
- a central cap (23) substantially discoid shape capable of capping said central portion (4), and
- an annular cap (32) adapted for covering said annular portion (8), characterized in that
- the pot (25) has a central area (33) arranged centrally to support the axial injector (6) and the radial injectors (11), and - at least the pot (25) and / or the head (27) comprises at least two channels (34) which extend radiating from said central area (33) or respectively said central portion (4) where they open out and to the outer edge of the pot (25) or respectively to the annular part (8) with which they communicate, said troughs (34) being closed by the head respectively (27) or the pot
(25) in the assembly position of said pot and head to constitute said convergent-divergent duct (13) forming tubular venturis substantially radial extent.
15. A gas burner according to claim 14, characterized in that:
- the pot (25) comprises at least two channels (34i) which extend radiating from said central area (33) respectively and which are open upwardly,
- the head (27) comprises at least two channels (34s) which extend radiating from said central portion (4) and which are open respectively downwards, and
- gutters (34i) of the pot (25) and the grooves (34s) of the head (27) are superimposed in pairs, in the assembly position of said pot and head to constitute said convergent-divergent conduits (13 ) forming tubular venturis substantially radial extent.
16. A gas burner according to claim 14 or 15, characterized in that the pot (25) has a solid structure and in that at least the pot (25) and / or the head (27) comprises at least two grooves (35) substantially radial, interposed between said gutters (34), extending between lead-through being in said central area (33) and the outer edge of the pot (25) or respectively of the head (27), these grooves ( 35) being respectively closed by the head (27) or pot (25) in the assembly position of said pot and head to provide passages (36) generally radial extent, to ensure the supply of primary air by the above the top plate (26) of the cooking appliance.
17. A gas burner according to claim 16, characterized in that:
- the pot (25) has at least two grooves (35i) are substantially radial, which are interposed between said channels (34i) and which open substantially upwardly,
- the head (27) comprises at least two grooves (35s) ​​substantially radial, which are interposed between said gutters (34s) and which open substantially downwards, and
- the grooves (35i) of the pot (25) and the grooves (35s) ​​of the head (27) are superimposed in pairs, in the assembly position of said pot and head to constitute said passages (36) of primary air supply.
18. A gas burner according to claim 14 or 15, characterized in that the pot (25) has a structure which is perforated (at 41) at least partially between the grooves (34i) and which is suitable for providing feed primary air from below the top plate of the cooking appliance.
19. A gas burner according to any one of claims 14 to 18, characterized in that the gutters (34i) of the pot (25) extend in the annular portion of the head (27) and the annular portion of the head (27) has a bottom (19) mistletoe is provided with openings (20) facing the ends located radially outwardly of said channels (34i) of the pot (25).
20. Gas burner according to any one of claims 14 to 19 and according to any one of claims 8 to 13, characterized in that the central region (33) of the pot (25) has a central opening
(37) through which said base (16) injectors of the support (6, 11) is engaged by the underside of the pot (25), with its tapered upper portion projecting above said central area (33) and with its lower part underlying the pot (25), said lower portion being provided with the or connecting bores (17; 44)).
21. A gas burner according to any one of claims 14 to 20, characterized in that the pot (25) and / or the head (27) comprises pairs of projecting fingers
(38) arranged on either side of channels (34i, 34s) and adapted to receive respective gutters
(34s; 34i) corresponding respectively to the head (27) and / or the pot (25).
22. Gas burner according to any one of claims 14 to 21 and according to any one of claims 11 to 13, characterized in that the pot (25) and / or the head (27) has three gutters (34i; 34s) substantially radially spaced apart angularly by about 120 ° and three grooves (35i, 35s) substantially radial interposed between said gutters.
EP20060794239 2005-07-29 2006-07-27 Gas burner with multiple concentric flame rings Active EP1910742B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR0508166A FR2889293B1 (en) 2005-07-29 2005-07-29 Gas burner has multiple concentric flame rings
PCT/FR2006/001844 WO2007012766A1 (en) 2005-07-29 2006-07-27 Gas burner with multiple concentric flame rings

Publications (2)

Publication Number Publication Date
EP1910742A1 true true EP1910742A1 (en) 2008-04-16
EP1910742B1 EP1910742B1 (en) 2017-09-06

Family

ID=36218267

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060794239 Active EP1910742B1 (en) 2005-07-29 2006-07-27 Gas burner with multiple concentric flame rings

Country Status (6)

Country Link
US (1) US7901205B2 (en)
EP (1) EP1910742B1 (en)
CA (1) CA2616133C (en)
ES (1) ES2649751T3 (en)
FR (1) FR2889293B1 (en)
WO (1) WO2007012766A1 (en)

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Also Published As

Publication number Publication date Type
EP1910742B1 (en) 2017-09-06 grant
CA2616133C (en) 2014-09-09 grant
ES2649751T3 (en) 2018-01-15 grant
FR2889293A1 (en) 2007-02-02 application
FR2889293B1 (en) 2009-12-18 grant
US7901205B2 (en) 2011-03-08 grant
WO2007012766A1 (en) 2007-02-01 application
CA2616133A1 (en) 2007-02-01 application
US20080206697A1 (en) 2008-08-28 application

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