KR20170139579A - Improved gas burner with multi-ring of main flames - Google Patents

Abstract

The present invention relates to an improved gas burner having a multi-ring of main flames, said gas burner comprising:
- an injector holder structure (2) provided with means (16) for mounting to the upper sheet metal of the cooking lathe,
- a central distribution chamber (42) provided in a central flame divider element (44, 86) fixed to the injector holder structure (2) and configured to create a central flame ring, said central distribution chamber (44) (6), < / RTI >
- an annular distribution chamber arranged in the annular flame dividing element (4), arranged in the injector holder structure (2), and configured to produce at least one ring of a main flame concentrically arranged with the central flame ring, The dispensing chamber 4 is separated from the central dispensing chamber 44 by an annular space 57 and closed by an annular cover 8 in the upper direction,
- a first venturi tube (32, 32 ') located in the injector holder structure (2) in the outline of the plane formed by the annular flame dividing element (4) Each of the first venturi tubes 32 and 32 'and the second venturi tubes 36 and 36' includes a venturi tube 36 and 36 ' 30 toward the respective injectors 22, 30 connected to the transverse walls of the annular distribution chambers 18, 24 and a cavity 34, which is fluidic connection to the central distribution chamber 4 and the annular distribution chamber 4, 38, < / RTI >

Description

Improved gas burner with multi-ring of main flames

The present invention relates to an improved gas burner with multiple flame rings.

For use in a cooking hob, gas burners with two or more main flame rings are known; Such a burner includes an inner circular portion creating an inner flame ring and an outer annular portion creating one or two flame rings concentric with the inner flame ring.

This type of burner can generally have one or more injectors, in which a gas flow is generated from one or more injectors, and the gas flow rate is controlled by a cock, which the user can operate using a knob is controlled by a cock.

In the case of a single injector or, in the case of a plurality of injectors connected to one cock outlet, all the flame rings are simultaneously regulated by the cock, now the burner is a "multi-ring burner" .

On the other hand, in the case of a plurality of injectors connected to two different cock outlets, the flame rings of the burner can be adjusted independently by using a particular two-way cock; In this case, the burner is not supplied with the outer flame rings, and the inner flame ring has a maximum delivery power (in which all the flame rings are supplied at the maximum height from the state of minimum delivered power provided at the minimum level maximum delivered power < / RTI > This type of burner is commonly known as a "dual burner ".

In view of the configuration, a burner with a multi-flame ring known in the prior art, whether multi-ring burner or dual burner, comprises an injector holder, a burner body positioned on the injector holder, A divider, and one or two covers positioned on the flame divider.

The injector holder of a burner with a prior art multi-flame ring is generally configured in the form of a cup and is provided with a circumferential flange in which the burner is made of a sheet metal of a cooking lathe, As shown in FIG. One or more connectors for a gas feed conduit are provided in the injector holder, together with one or more threaded seats for providing an injector, which is connected to the type of gas supply burner They must be interchangeable.

In certain instances, the burner body, which is integrally formed with the injector, includes one or more venturi tubes which, in one or more venturi conduits, are mixed with the gas exiting the injector entrained primary air is mixed with the gas.

The flame dividers are generally composed of hollow pieces arranged on the burner body and include one or more chambers for distributing the mixture to one or more port sets A flame ring or a plurality of flame rings may be formed through the port.

The distribution chamber can also complete the mixing step if the mixing procedure can not be completed in the venturi tube of the burner body.

The cover generally includes a discoidal portion bounded with the inner circular distribution chamber of the flame splitter in an upward direction and an annular portion bordering the outer annular distribution chamber of the flame divider in an upward direction .

Depending on the type of burner, the two cover parts may be individually constructed or joined together by radial connection parts.

Currently, these two types of burners are widely sold in the marketplace, and according to the requirements, each user can select a burner by emphasizing certain aspects even if other burner aspects are abandoned.

Regardless of the nature of these different types of multi-flame ring burners, the present invention provides a solution to the disadvantages.

One drawback of the above disadvantages is that a hard sheet metal spot-facing operation is required at the surface of the various burner components, so that the burner components can be formed in such a way that a substantial coupling seal can be formed They must be joined together. In particular, such a spot-pacing process becomes more complicated when there are a plurality of individual spot-paced surfaces in each burner component, because in order to arrange them perfectly coplanar coplanarity) spot-pacing process becomes even more difficult.

Another disadvantage is the inaccurate spark gap, a so-called structurally inevitable problem, that discharges the electrodes and sparks of the ignition spark plug, which is generally provided in the injector holder, The distance between the burner surfaces being formed. In this case, on the one hand, the precise ignition requires that the distance between the electrode of the spark plug and the burner surface be correct and therefore the spark gap tolerance must be minimized, and on the other hand, The gap error may be caused by a plurality of errors, for example, an error in the spark plug seat, an error in the functional height of the injector holder cup, an error in the functional height of the flame splitter, Error, loose coupling between the injector holder cup and the flame divider, and the like.

An additional disadvantage is that the flexibility of applying aspects of the burner to the appearance and functional requirements of different countries is so inflexible that burner manufacturers have to produce too many products to address a wide range of market requirements.

WO2010 / 105748 discloses a flame dividing element used in a cooking lathe in which a flame dividing element for generating a central flame ring and a flame dividing element for producing two outer annular rings are integrally formed and arranged on an injector holder Gas burners. This application, however, does not, technically, ensure that the thermocouples fixed to the ignition spark plug and the injector holder are precisely and precisely aligned with respect to the central distribution chamber, since the individual elements separated from the injector holder And they are arranged on the injector holder and inevitably cause mutual misalignment.

In addition, a good seal must be formed for the combustion mixture to form in the venturi tube provided in the injector member and to reach the distribution chamber provided in the flame dividers located on the injector holder, There is a problem that the process is difficult and the production cost is increased.

EP2503237 describes a gas burner having a circular body in which an inner circular distribution chamber is formed to create an inner flame ring and an outer annular distribution chamber is formed to create an outer flame ring. Between the two dispensing chambers, a diametrical support for the ignition spark plug and the thermocouple is provided, so that it is not precisely aligned with respect to the inner dispensing chamber which has to be cooperated accordingly. In addition, two venturi tubes extend outwardly with respect to the entire outline formed by the annular outer flame splitter, whereby there are a series of limitations in mounting the burner into the cooking lathe There arises a problem that the total size of the burner must be increased.

It is an object of the present invention to provide a method and apparatus for use in a cooking hob which can be used as a "multi-ring burner" or a "dual burner" ring to provide a gas burner to eliminate or at least reduce these disadvantages described above.

It is a further object of the present invention to provide primary air to form a combustion mixture for feeding from the top of the cooking lathe or from the bottom of the cooking lathe to the central flame ring or outer flame ring The present invention provides a multi-flame ring burner that can be used as a burner.

It is a further object of the present invention to provide a multi-flame ring burner which can minimize spark gap tolerance without machining with very high precision.

It is a further object of the present invention to provide a multi-flame ring burner that is flexible in the appearance and functional aspect of the burner, thereby meeting a number of different market requirements .

It is a further object of the present invention to provide a multi-flame ring burner in which the injector can be easily replaced to fit the burner to different gases without the need to disassemble the burner or remove the burner from the cooking lathe will be.

It is a further object of the present invention to provide a multi-flame ring burner that can be easily and efficiently regulated in distance between an injector or a plurality of injectors and a venturi tube or a plurality of venturi tubes, .

It is a further object of the present invention to provide a multi-flame ring burner having a small overall planar size.

It is a further object of the present invention to provide a multi-flame ring burner having different characteristics in configuration and performance as compared to prior art burners.

It is still another object of the present invention to provide a multi-flame ring burner that can be manufactured simply, inexpensively, and quickly.

All of these and other objects are achieved in accordance with the present invention by an improved gas burner having the multi-flame ring described in claim 1.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in more detail in the context of some preferred embodiments with reference to the accompanying drawings, in which:
1 is an exploded perspective view of a burner according to the present invention, in which an injector holder is provided on a cooking lathe,
2 is an exploded perspective view showing two components of the injector holder,
3 is a plan view showing a burner mounted,
4 is a vertical sectional view taken along line IV-IV of FIG. 3,
FIG. 5 is a vertical sectional view taken along the line VV of FIG. 4,
FIG. 6 is a vertical sectional view taken along line VI-VI of FIG. 4,
7 shows a second embodiment of the present invention similar to that of Fig. 5,
8 shows a second embodiment of the present invention which is the same as Fig. 6,
Fig. 9 is a schematic view of the third embodiment of the present invention, which is the same as Fig. 6,
10 is a perspective view of a fourth embodiment of the present invention in which the burner body is partially delivered;

As can be seen from the figure, the improved burner according to the invention is basically formed of four components: a burner body 2, an annular flame splitter 4 and two covers 6 and 8.

The burner body 2 is actually formed of two parts: the injector holder cup 10 and the cover element 12, which can be detachable using screws or permanently fixed to one another by rivets.

The burner body 2 has a planar shape which can be regarded as a substantially circular shape and in the edge 7 is a radially opposed portion which forms two opposite portions of the arched edge 9 there are two diametrically opposite circular segments (deprived of).

The burner body 2 is provided to the sheet metal 14 of the cooking lathe from below and is used to fix the cover element 12 and the injector holder cup 10 together, . To assist in fixing the burner body 2 to the shelf sheet metal, the sheet metal is provided with an aperture through which the upwardly projecting portions of the cup 10 pass, Lt; / RTI > with the remaining flat portions on the edge of the < RTI ID =

The injector holder cup 10 of the burner body 2 is provided with six upwardly open cavities,

Having a curved wall provided with a threaded seat for the first injector 22 in the interior direction, and a second gas connector 20, which is open in the downward direction, The cavities 18,

A transverse wall 26 which is closed downward and which separates from the first cavity 18 and a second gas connector 28 is provided in the outward direction and a second gas connector 28 in the outward direction is provided in the second injector 30, A second cavity 24 having a curved transverse wall provided with a threaded sheet for the first cavity 24,

A lower portion of a first venturi conduit that is aligned with an axis of the first gas connector 20 and the axis of the first injector 22 and connects the first cavity 18 to the fourth cavity 34; A third cavity 32 forming a longitudinal half,

A fourth cavity 34, which is closed in the downward direction and located in an opposite part to which the two cavities 18 and 24 are provided, with respect to the longitudinal direction of the burner formed in the direction of the third cavity 32,

A lower longitudinal half portion of the second venturi tube which is aligned with the axis of the second gas connector 28 and the axis of the second injector 30 and which connects the second cavity 24 to the sixth cavity 38; A fifth cavity 36,

A sixth cavity 38 closed in the downward direction and located in the central portion of the injector holder cup 10;

The cover element 12 of the burner body 2 has a planar shape substantially corresponding to the portion of the injector holder cup 10 that does not include the first cavity 18 and the second cavity 24. [ The cover element 12 is provided with an arch-shaped slotted bore 40 in which the raised perimetral edge 42 is provided and the cover element 12 is provided with an injector- (34) when connected to the first cavity (10).

From the lower surface of the cover element 12, two parallel longitudinally projecting portions provided with two cavities 32 'and 36' project downwardly, the two cavities 32 'and 36' Forming the upper half of the Venturi tube and the upper half of the second Venturi tube, i.e., the two cavities 32 'and 36' are complementary to the third cavity 32 and the sixth cavity 36 Is complementary.

Both the first venturi tubes 32 and 32 'and the second venturi tubes 36 and 36' are arranged in a substantially horizontal direction and are formed in parallel and are arranged in an outward direction by an annular flame divider element 4 Is located in the body 2 in the outline of the plane formed by the first and second planes.

In addition to being provided with the protruding peripheral portion 42 of the slotted bore 40, in the center of the upper surface of the cover element 12 is formed a somewhat frusto-conical shape and forms the central flame divider element of the burner A projecting appendix 44 is provided. The projection attachment is located above the sixth cavity 38 of the injector holder cup 10 and is provided with a horizontal baffle 46 at the center which is provided with a circular hole 48 at the center of the horizontal baffle 46.

The upper edge of the projection appendix 44 is provided with radial recesses 50 for providing an inner circular flame ring. The recesses are bounded with the circular cover 6 in the upper direction and the circular cover 6 is interlocked with the three central protruding portions 54 in the upward direction from the baffle 46 ).

The ignition spark plug 56 and the thermocouple 58 are fixed to the cover element 12 in which the flame divider 44 is formed in the center and in this way the precise and stable position do.

A transverse edge of the cover element 12 distant from the aperture 40 is provided with a protruding portion 60 which is arranged such that the cover element is in contact with the injector holder cup 10, Which is formed by the first cavity 18 and the second cavity 24 when the first cavity 18 and the second cavity 24 are fixed to each other. The protruding portion 60 includes a prolongation of a similar protruding portion 62 provided in the injector holder cup 10 so that the first cavity 18 has a protruding portion 60, And the second cavity 24 is completely surrounded by the projecting portion 60 and the second gas connector 28 except for the portion corresponding to the wall where the second gas connector 28 is provided. Borders the projecting portion 62 and the upper portion of the baffle 26.

An annular outer flame divider 4 formed as a separate part separated from the central flame divider 44 includes an outer circumferential wall 64 provided with a plurality of radial recesses 66 and an outer circumferential wall 64 provided with an annular flange 70, The annular flange 70 has an opening 68 connected to the aperture 64 and having an opening 72 having the same shape and dimensions as the shape and dimensions of the aperture 40 of the cover element 12 . The hole 72 is provided with a downwardly directed edge 74 which is configured to adhere to the protruding edge 42 of the slotted hole 40 when the flame splitter 4 is positioned on the burner body 2. [ Is provided.

Both the outer wall 64 and the inner wall 68 of the flame dividers 4 have an interruption in the portion diametrically opposed to the apertures 72, 68 are extended to meet the outer wall 64 and are provided with an annular flange 70 for cross-ignition between the outer flame ring and the inner flame ring of the burner, Thereby forming a radial channel 76 in which an ignition port 77 is provided. The base of the channel 76 extends slightly inward and bounds a transverse edge 78 that faces downward and cooperates with the protruding portion 60 of the cover element 12.

The annular cavity formed by the outer wall 64, the inner wall 68 and the flange 70 of the flame divider 4 forms a distribution chamber for the outer flame ring, The annular cover 8 is bounded by the protruding recess 66 in the upper direction.

An annular distribution chamber for the outer flame ring is separated from the central distribution chamber by an annular space (57).

Under these operating conditions, the first and second gas connectors 20, 28 are connected to a cock (not shown) for controlled gas delivery, and the burner body 2 Is fixed to the sheet metal 14 of the cooking lathe by screws 16 and the flame splitter 4 is arranged on the projecting portions 42 and 74 and the projecting portions 60 and 78 on the burner body 2. [ The cooperating surfaces of the projecting portions 42, 74 and 60, 78 are spot-faced to be substantially more accurately sealed contacted.

Under these operating conditions, the two covers 6 and 8 are located above the central flame divider 44 and above the annular flame splitter 4, respectively.

Under the above conditions, the gas discharged from the injector 22 flows into the horizontal venturi 32, 32 'and is entrained with air, at which time the air flows along the path indicated by the arrow 80 in FIG. And flows into the first cavity 18 through the lower hole.

Gas and primary air are mixed in the venturi 32 and 32 'and the mixture reaches the fourth cavity 34, which is opened only in the top direction, Into the annular cavity of the annular outer flame splitter 4 to provide the flame of the outer ring. In the figures, the annular flame splitter 4 is shown as one flame ring directed outwardly from the burner, but the flame divider 4 may be provided with two flame rings, It may have a flame ring.

On the other hand, the gas discharged from the injector 30 flows into the horizontal venturi 36, 36 'by the cut-off portion of the projecting portion 62, and along the path indicated by the arrow 82 in FIG. 6, Is mixed with the primary air started from the upper part.

Gas and primary air are mixed in the venturi 36 and 36 'and the mixture reaches the sixth cavity 38, which is opened only in the top direction, and then in the holes 48 in the baffle 46 Into the upper chamber of the flame splitter 44 to provide the flame of the inner ring.

From the above description, the improved burner according to the present invention has particular advantages over prior art burners having a multi-ring of main flame, Have:

The outer surface flame dividers 4 and the burner bodies 2 to be spot-paced have a small surface area and a small number of parts,

- the spark plug 56 is accurately positioned in the inner portion 44 of the burner and thus the spark gap tolerance is reduced,

- very insensitive to the streaming effect, since the primary air provided in the inner flame ring is introduced from above the cooking lathe,

- can be accessed directly from the top, so that it can be easily replaced without removing the burner,

By simply connecting the two gas connectors 20 and 28 to one or two other outlets of an adjustment cock, it can be used as a multi-ring or dual burner,

- formed of a small number of components,

The annular outer flame dividers can be easily replaced with other flame dividers of different characteristics, which modify the appearance of the burner or are suitable for the requirements of various countries for the burner material used,

Is slightly less than the prior art burners of the same diameter, due to the fact that it is not a perfect circle but because of the circular burner body 2 and in particular because there are no two parallel circular segments, peripheral position, it can be mounted on a cooking lathe, thereby increasing the burner positioning option.

7 and 8 shows that the first cavity 18 is closed in the downward direction and the protruding edge 62 is in a position in which the primary air is cooked along the path indicated by the arrow 84 in FIG. But includes all the features described above, except for the fact that it has a cutout to allow it to enter from above the shelf.

The second embodiment is very insensitive to the flow effects provided by the inner flame ring as well as the outer flame ring.

In addition, in the second embodiment, the central flame divider 44 is not constructed integrally, and the upper ring 86, which is provided with a recess 50 and is separate from the underlying part 44, I have. 8, in any case, the upper ring 86 is connected in a form-fit manner so that the lower portion 44 is provided on the upper surface of the cover element 12, thereby forming a rigid burner body 2. In this case, the central flame divider formed by the lower portion 44 and the upper ring 86 is integrally formed and configured independently of the annular outer flame divider 4.

While this embodiment may be less desirable in that it involves, on the one hand, a less accurate spark gap, on the other hand, the upper ring 86 of the inner flame splitter, which is in contact with the flame, Which is suitable for use in various countries where the burner material specification must include the exact nature of the material in contact with the flame, as well as the inner central flame splitter < RTI ID = 0.0 > Can be formed differently from the external appearance of the annular outer flame dividing device 4. [

In the second embodiment, the primary air for the outer flame ring is introduced from above the cooking lathe, but in other embodiments not illustrated, as in the embodiment illustrated in FIG. 5, have.

The third embodiment illustrated in FIG. 9 is such that the primary air, in which the secondary cavity 24 is closed in the downward direction and forms a combustion mixture for the inner flame ring, But includes all the features described above.

Figure 10 illustrates a fourth embodiment of a burner, which is similar to the embodiment described above with respect to any one of the venturi tubes 32, 32 'and 36, 36' Additional features that can adjust the distance between the inlet end of the tube and the respective injectors 22 and 30 and more specifically the specific case illustrated by the venturi 32 and 32 ' Is integrated with an additional feature that the tube can actually move relative to the burner body (2).

This embodiment is particularly useful when the burner is used in countries where the feed gas composition is varied between different regions of the same country. In this case, the burner is particularly useful for applying the burner to a specific gas composition without removing the cooking lathe or the burner provided.

9, in the previous embodiments, the cover element 12 and the injector holder support 10, which form the venturi tubes 36 and 36 'when coupled to each other, Thereby forming a cylindrical cavity for receiving the outer cylindrical tube 88 formed of Venturi. The tube 88 is supported by a grub screw 90 which is axially movable within a cylindrical sheet and which passes through a threaded hole provided in the cover element 12 It can be fixed in the desired axial position and can even be easily accessed from above when the burner is mounted on the cooking lathe.

The venturi tube 88 is also positioned such that the distance between the injector 22 and the inlet reaches a value suitable for a particular feed gas composition, even when the loose screw 90 loosens, As shown in FIG.

In order to more easily handle the venturi tube 88, it is preferred that both ends protrude from the cylindrical sheet, with both ends having an upper hole in the first cavity 18 and an upper hole in the fourth cavity 34 Because it can be easily accessed from above.

This applies equally to the venturi tubes 36 and 36 'provided in the central cavity 38 of the burner.

Claims (16)

An improved gas burner having a multi-ring of main flames, said gas burner comprising:
- an injector holder structure (2) provided with means (16) for mounting to the upper sheet metal of the cooking lathe,
- a central distribution chamber (42) provided in a central flame divider element (44, 86) fixed to the injector holder structure (2) and configured to create a central flame ring, said central distribution chamber (44) (6), < / RTI >
- an annular distribution chamber arranged in the annular flame divider element (4) arranged in the injector holder structure (2) and configured to generate at least one ring of a main flame concentrically arranged with the central flame ring, the annular distribution chamber (4) is separated from the central distribution chamber (44) by an annular space (57) and closed by an annular cover (8) in the upper direction,
- a first venturi tube (32, 32 ') located in the injector holder structure (2) in the outline of the plane formed by the annular flame dividing element (4) Each of the first venturi tubes 32 and 32 'and the second venturi tubes 36 and 36' includes a venturi tube 36 and 36 ' 30 toward the respective injectors 22, 30 connected to the transverse walls of the annular distribution chambers 18, 24 and a cavity 34, which is fluidic connection to the central distribution chamber 4 and the annular distribution chamber 4, 38) having an outer end that is open to the outside of the burner. 5. A fuel injector according to claim 1, further comprising one or more ignition spark plugs (56) and thermocouples (58) provided in the injector holder structure (2) and cooperating with the central flame divider element (44) Improved gas burner with multi-ring of flames. 3. A device according to claim 1 or 2, characterized in that the injector holder structure (2) comprises a lower injector holder cup (10) and an upper cover element (12) Improved gas burner. 4. An injector according to any one of claims 1 to 3, characterized in that the injector holder structure (2) has a substantially circular planar shape but no two opposite portions (7) with a circular segment shape Improved gas burner with multi-ring of main flames. 5. An improved gas burner according to any one of claims 1 to 4, wherein the central flame divider element (44) is formed integrally with the injector holder structure (2). 6. A burner according to any one of claims 1 to 5, wherein the central flame divider element comprises a top element (86), wherein the top element (86) is provided with a recess Ring is provided and connected to the lower portion (44) fixed to the injector holder structure (2) in a foam-fitting manner. 7. The injector holder cup (10) according to any one of claims 1 to 6, further comprising:
- a first cavity (18) in which the first injector (22)
A second cavity 24 in which the second injector 30 is accommodated,
A third cavity 32 forming a lower longitudinal portion of the first venturi tube 32, 32 '
- a fourth cavity (34) in which the first venturi tube (32, 32 ') is open,
- a fifth cavity (36) forming the lower longitudinal portion of the second venturi tube (36, 36 '), and
- An improved gas burner with a multi-ring of main flames, characterized in that a sixth cavity (38) is provided with an open second venturi tube (36, 36 '). 8. A device according to any one of claims 1 to 7, characterized in that two cavities (32 ', 36') are formed in the injector holder structure (2) when the upper cover element (12) And two cavities 32 'and 36' are formed in the upper cover 12 of the venturi tube 32 and 32 'to form the upper longitudinal portions of the first venturi tubes 32 and 32' and the second venturi tubes 36 and 36 ' Wherein the main burner has a multi-ring of main flames. 9. A method as claimed in any one of claims 1 to 8, wherein the second cavity (24) is in communication with the upper part of the cooking lathe in which the second cavity (24) is closed in the downward direction and arranged on the outside of the burner Characterized in that a primary air, which is mixed with the gas exiting from the second injector (30), is passed through the said hole. 10. A method according to any one of claims 1 to 9, wherein the second cavity (24) is open in an upward direction for introducing primary air, the primary air flows from a lower portion of the cooking lathe Characterized in that the burner is provided to form a combustion mixture supplied to the divider (44). 11. A method according to any one of the preceding claims, characterized in that the first cavity (18) is communicated with the upper part of the cooking lathe, which is closed in the downward direction and arranged on the outside of the burner in the upper direction, Characterized in that a primary air which is mixed with the gas exiting the first injector (22) is passed through the said hole. 12. A method according to any one of claims 1 to 11, wherein the first cavity (18) is opened downwardly to pass primary air and the primary air starts from a lower portion of the cooking lathe Ring of the main flame is mixed with the gas exiting the first injector (22). 13. A burner according to any one of claims 1 to 12, wherein the annular flame splitter (4) and / or the central flame divider (44) portion provided with holes (50, 66) high flame resistance and is formed of a material different from the material forming the remainder of the burner. 14. A device according to any one of the preceding claims, wherein a first and / or a second venturi tube is provided in an inner cylindrical sleeve (88), the inner cylindrical sleeve (88) being formed in the injector holder structure The injector holder structure 2, which can move axially in each cylindrical seat and is provided on a cooking lathe, is adapted to be fixed in a desired axial position by means of one or more fixing members 9, Characterized in that the burner has a multi-ring of main flames. 15. The injector according to any one of claims 1 to 14, characterized in that the fixing member (90) comprises a sleeve (88) which engages the outer surface and tip of the sleeve (88) Characterized in that the gas burner is composed of a screw thread. 16. Sleeve (88) according to any one of the preceding claims, characterized in that the sleeve (88) comprises a cavity (18,24) in which the upstream end of the sleeve (88) is open and a downstream end Has a length that is greater than the minimum distance between the cavities (34, 38) to be opened.

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