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
  • F23D14/065—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with radial outlets at the burner head with injector axis inclined to the burner head axis
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23D—BURNERS
  • 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
  • F24—HEATING; RANGES; VENTILATING
  • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
  • F24C3/00—Stoves or ranges for gaseous fuels
  • F24C3/08—Arrangement or mounting of burners
• • 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
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
  • F24C3/00—Stoves or ranges for gaseous fuels
  • F24C3/08—Arrangement or mounting of burners
  • F24C3/085—Arrangement or mounting of burners on ranges

Definitions

• the invention relates to assemblies formed by a top plate of a cooking appliance, especially for domestic use, and to multiple flame crown gas burners which are adapted to be mounted on such a plate.
• Such burners generally comprise a central burner and an annular burner, surrounding the central burner.
• Such burners are used when a large heating power is required and / or, in conjunction with respective gas supply devices of the central and annular burners, when a modulation of the heating power is required (Asian cooking by example).
• the annular burner may also comprise only one outer flame crown.
• EP 1 120 603 describes, for example, such burners.
• the invention therefore aims to provide a gas burner multiple rings of flames of an improved type, whose structure is suitable to allow its implementation both on a conventional stove on a thin baking sheet (less than 3 cm).
• the invention relates to a gas burner with multiple rings of flames, adapted to be mounted on a top plate of a cooking appliance particularly for household use, the top plate extending substantially in a plane of plate, said gas burner comprising: a central burner having a ring of peripheral flames and at least one annular burner having at least one ring of peripheral flames, said annular burner surrounding the central burner,
• said burner body comprising at least a first gas inlet communicating with a first gas injector located opposite a first converging-diverging Venturi duct, said first duct having an axis capable of extending substantially parallel to said plate plane; said first conduit extending over at least most of a transverse extent of the burner body,
• said first conduit being, at its end opposite said first gas injector, in communication with a well substantially perpendicular to said axis of said first conduit, said well being open upwards and able to supply said annular burner with an air / gas mixture.
• the burner according to the invention is remarkable in that said burner body comprises a second venturi duct, whose axis is parallel to the axis of the first duct and situated above said first duct, said second duct having an end in communication with an upward opening of the burner body, able to supply said central burner with an air / gas mixture.
• a multi-ring flame burner is formed in which the mixture of gas and air jets passing through the first venturi and supplying the external burner head is also used to feed the inner burner head, because the Venturi feeding the inner burner head communicates with the venturi of the outer burner head.
• This optimizes the occupation space of the burner body.
• by horizontally orienting the Venturi supply of the inner burner head, and positioning on one another the two Venturi limit the occupation height of the assembly, which allows to create sets space-saving, can be mounted on a reduced-thickness baking tray.
• the assembly according to the invention may also comprise the following characteristics, taken separately or in combination: the second conduit may comprise a second open end in said well, so that the air / gas mixture of said first conduit also circulates in said second conduit. This allows the use of a single gas supply to supply both central and annular burners.
• the burner body may comprise a second gas inlet communicating with a second gas injector situated opposite the second Venturi duct, the second gas injector being positioned at a second end of said second Venturi duct, said second end being opposite; at said end in communication with the upward opening of the burner body, said second gas injector being oriented parallel to said first gas injector.
• the central burner and the annular burner may each respectively comprise a central burner head and an annular burner head and, respectively, a central burner cap and an annular burner cap.
• the central burner head and the annular burner head can be made in one piece. This facilitates the mounting of the burner.
• the central burner head assembled to the burner body may form a corridor parallel to the axis of the first and second ducts forming Venturi, the corridor may have a corridor inlet formed by the upward opening of the burner body and a corridor outlet opening substantially in the center of the central burner head.
• the burner body can form with the central burner head, an air inlet chamber around said second gas injector.
• Said second gas inlet may open into said air inlet chamber in the vicinity of said second gas injector.
• the annular burner head may comprise an annular chamber bordered at least one-laterally by flames passages and having at its bottom an opening in communication with said well.
• the central burner head may include a central burner chamber having an opening adapted to communicate with the upward opening of the burner body.
• the burner body may comprise an air inlet opening in the vicinity of the inlet of said first Venturi duct.
• the annular burner may be inferiorly surrounded by a peripheral skirt inclined downwards, the peripheral skirt being preferably made removable.
• the burner may comprise at least one flame detection thermocouple and / or at least one electric ignition element and said at least one thermocouple and / or said at least one electric ignition element may be functionally associated with the central burner .
• the invention also relates to an assembly comprising at least one gas burner as defined above and a cooking plate.
• the axis of the first conduit is positioned below the plate plane of the hob and the axis of the second duct is positioned above the plate plane of the hob.
• the assembly has a much lower occupancy height than known assemblies.
• the second duct is enclosed between the cooking plate, on the one hand, and the central burner and the annular burner, on the other hand. With this arrangement, the second conduit is preserved from any introduction of dirt, which facilitates the cleaning of the assembly.
• the assembly comprises at least one primary air inlet located below the plate.
• FIG. 1 is a perspective view of an assembly according to a first embodiment of the invention
• FIG. 2 is a sectional view of the assembly, according to the plan ll-ll shown in Figure 1;
• FIG. 3 is an exploded view of the assembly shown in FIG. 1;
• FIG. 4 is an enlargement of part IV indicated in FIG. 3, showing in perspective the burner body of the assembly shown in FIGS. 1 to 3;
• FIG. 5 is an enlargement of the part V indicated in FIG. 3, showing in perspective the burner heads of the assembly shown in FIGS. 1 to 3;
• FIG. 6 is a perspective view of an assembly according to a second embodiment according to the invention
• FIG. 7 is a longitudinal sectional view along the plane VII-VII shown in FIG. 6
• FIG. 8 is a cross-sectional view along the plane VIII-VIII shown in FIG.
• FIGS. 1 to 5 Reference will first be made to a first embodiment illustrated in FIGS. 1 to 5.
• the assembly includes a gas burner having an inner burner head 1 (or central burner), which is centrally located, having a peripheral flame crown (flame passages 2 ) and at least one outer burner head 3 (or ring burner), which is annular and remotely surrounds the central burner head 1, having at least one ring of flames, inner and / or outer.
• the annular outer burner head 3 has an outer flame ring (flame passages 4).
• FIGS. 1 to 8 comprise the same burner heads 1 and 3.
• the inner and outer burner heads 1 and 3 are made in one piece. This has the advantage of reducing the number of parts in the assembly according to the invention.
• the inner and outer burner heads 1 and 3 thus forms a single piece which, through a burner body 6, is adapted to be mounted on a cooking plate P.
• the cooking plate P is, for example a cooking plate or a hob. It is visible in the drawings of Figures 1 to 3.
• the plate P extends substantially along a plate plane P1.
• the burner body 6 is visible in particular in Figures 1, 2 and 4.
• This burner body 6 here has a relatively elongated shape, substantially in correspondence with the diameter of the outer burner head 3 which overcomes said body.
• the burner body 6 is arranged to be fixed, by fixing means, at least partially under the top plate P of a cooking appliance.
• FIG. 4 shows in particular that the burner body 6 is bordered, at least partially substantially at mid-height, by a fastening flange 70, having punctures 71 occasionally.
• the plate P has a cutout 72 corresponding substantially to the shape of the section of the burner body 6, to accommodate the burner body 6 ( Figure 3).
• Holes 73 are also made around the cut 72. Some holes 73 are in vertical correspondence with the holes 71 of the flange 70 of the burner body when the latter is positioned in the cut 71 of the plate p. Fastening means, such as nuts and screws (not shown) placed in the holes 71 and 73, ensure the attachment of the burner body 6 to the plate P.
• a gas inlet 8 connectable to a gas supply via control means (not shown) which preferably are clean.
• the gas inlet 8 is in communication with a gas injector 9 located coaxially facing an end of a conduit 10 first convergent, then diverging and forming a tubular Venturi, which extends substantially over most of the length of the burner body 6, that is to say the diameter of the outer burner head 3, along an axis parallel to the plane P1.
• the primary air inlet lumen is supplied with air through a through opening 80 and / or through the opening 81 made through the burner body 6, in the vicinity of the gas injector 9.
• the burner body 6 is made in two parts assembled together.
• a first portion 60 which includes the conduit 10 and a portion 61 which comprises a receiving housing for the injector and which is assembled at one end of the portion 60, opposite the inlet of the conduit 10.
• the arrow F on Figure 4 shows where to position the workpiece 61 relative to the workpiece 60 to assemble them together.
• FIG. 2 shows that the end 62 of the piece 60 fits into the end 62 of the piece 61.
• parts 60 and 61 could be made in one piece.
• the conduit 10 is connected to a substantially vertical well 12 bringing the air-gas mixture into the external burner head 3.
• the burner body 6 comprises a second tubular Venturi duct 5, which extends parallel to the duct 10, also substantially over a portion of the length of the burner body 6.
• the second duct 5 5 is disposed above the duct 10 and in the opposite direction: the inlet 50 of the duct 5 is made from the well 12 and the outlet of the second duct 5 is through an opening 51 made on the top of the duct 5, in the vicinity of its end 52 opposite the end 53 having the inlet 50 of the second duct 5.
• the second conduit 5 communicates with the well 12 and the air / gas mixture circulating in the conduit 12 is also caught in the second conduit 5 in which it also circulates.
• the outlet opening 51 of the second duct 5 opens into a passage 54 which opens out substantially at the center 59 of the central burner head 1, which makes it possible to drive the air / gas mixture into the central burner head 1.
• the outer burner head 3 has an annular chamber 22 located in the vicinity of the outer periphery of this head.
• the chamber 22 is formed by a channel defined by a bottom 23 and two concentric side walls 24, 25 and a lid or annular cap 26 capping said channel ( Figure 1).
• In the wall 25 are formed notches forming flames passages 4.
• the notches forming the flame passages are of different depths to allow better combustion and a non-brittle flame crown.
• the bottom 23 of the chamber has an opening 27, which is positioned opposite the substantially vertical well 1 1 (above) of the burner body 6 when the assembly is assembled ( Figure 2).
• annular cap 26 is guided, when it is put in place, and retained in position by positioning fingers 28 integral with the external burner head 3.
• the outer burner head 3 is arranged so that between a central region which will be discussed later and the chamber annular 22, it comprises lights 29 which open this intermediate annular zone.
• the outer burner head 3 is integral with the central burner head 1 at least via bridges 31 made between the central burner head 1 and a positioning finger 28, integral with the concentric side wall 24 of the external burner head 3.
• the central inner burner head 1 has a central region, which has a central opening 34.
• the central opening coincides with the outlet of the passage 54 mentioned above, which makes it possible to guide the air / gas mixture leaving the second duct 5 towards a central region of the central interior burner head 1.
• the passageway 54 is partially formed by the top of the burner body 6 having projections, and partially by a portion of the central burner head connected to the burner body 6.
• Figure 4, illustrating the burner body 6 shows a protruding portion in the form of rectangle 55 provided on the upper part of the burner body 6.
• the solid bottom 56 of the interior space delimited by the rectangle-shaped protruding portion 55 is formed by the wall of the burner body and is situated substantially at the same level as that of the outlet end 51 of the second duct 5.
• the solid bottom 56 forms the bottom of the corridor 54.
• the side walls of the passage 54 are formed in part by the rectangle-shaped protruding portion 55, and by the side walls of a parallelepiped shaped hollow portion 57 which connects the side wall 24 of the outer burner 3 and the inner burner 1 .
• the passage 54 is formed between the rectangle-shaped projection portion 55 and parallelepiped-shaped hollow portion 57.
• the corridor 54 has an axis parallel to the axis of the first and second conduits 10 and 5 (respectively) and comprises:
• a corridor outlet which opens substantially in the center of the central burner 1, so that the air / gas mixture from the well 12 is delivered to the center of the internal central burner 1.
• the central burner head 1 comprises a peripheral wall 35 which is pierced with notches 2, of different depths, forming flames passages (see FIGS. 3 and 5 in particular).
• a cap or cover 36 rests on the wall 35 (see FIG. 1).
• the outer burner head 3 is, as is often the case for gas burners, lined internally by a peripheral annular skirt 38 inclined downwards. This skirt may be an integral part of the burner head 3, or may be an annular piece removably attached to the burner head 3: this annular piece 38 may be implemented by appropriate shoulders, for example.
• the burner body 6 when attached to the plate P, occupies a space above the plate P and a space below the plate P, which further reduces the bulk of the body Burner under the plate P and allows to install the burner body in very small spaces as, for example, under a baking sheet of reduced thickness (less than 3 cm).
• the burner body 6 has housings 74 and 75 in its fastening flange 70 for accommodating, respectively, at least one thermocouple Th and at least one electric ignition element A I.
• FIGS. 6 to 8 Reference will now be made to a second embodiment shown in FIGS. 6 to 8. The same references have been retained to designate the elements common to the two embodiments.
• the second embodiment comprises the same burner heads 1 and 3 made in one piece and the same plate P as the assembly shown in Figures 1 to 5.
• burner body 6 It also comprises substantially the same burner body 6, since it comprises in particular the gas inlet 8, the injector 9, the two ducts 10 and 5 forming Venturi.
• the burner body 6 of this second example has features that the burner body 6 of the first embodiment does not have and which will be developed now:
• the burner body 6 in the second embodiment comprises a second gas inlet 13 distinct from the first inlet 8 mentioned above, and disposed here on the side of the body 6, perpendicular to the axes of the two ducts 10 and 5.
• the gas inlet 13 is connectable to a gas supply via control means (not shown) which preferably are clean and are distinct from the supply control means of the first arrival of gas 8.
• the burner body 6 of the embodiment shown in FIGS. 1 to 5 also comprises this second gas inlet.
• the second arrival in the first embodiment is achieved by a blind hole.
• well 12 of the burner body is not in communication with the second conduit 5 in this second embodiment.
• the burner body 6 of the second embodiment and of the first embodiment can be made by machining the same basic burner body: particular machining operations are thus performed according to whether it is desired to carry out a burner body with one or two gas inlets.
• the gas inlet 13 is in communication with a gas injector 14 which is directed parallel to the second Venturi 5, and therefore parallel to the first gas injector 9: in FIG. the injector 14 is substantially horizontal and substantially parallel to the axes of the ducts 10 and 5.
• the gas injector 14 is positioned at one end of the second duct 5 (end forming the inlet 50 of the duct 5), opposite the outlet 51 of the duct 5 (the outlet 5 corresponds to the opening towards the top of the body of the duct 5). burner 6).
• the communication between the gas inlet 13 and the second gas injector 14 is made by means of a pipe 15 pierced through the burner body 6, visible more particularly in FIG. 8.
• the duct 15 is rectilinear and has a first end 16 open in the gas inlet duct 13 and a second end 17 which opens at the rear of the second gas injector 14 (see Figures 7 and 8).
• the second gas injector 14 is positioned in a recess 18 made in the burner body 6 upstream of the second duct 5 forming Venturi.
• the cutout 18 of the burner body 6 is placed under a second parallelepipedal portion 58 connecting the two burner heads 1 and 3, the second parallelepipedal portion 58 being in the extension of the first parallelepipedal portion 57, according to the diameter of the head of the annular outer burner (see Figure 7).
• the second parallelepipedal portion is formed by walls connecting the concentric side wall of the annular outer burner head 3 and the peripheral wall of the central inner burner head 1.
• the second parallelepipedal portion 58 is open downwardly so as to form a lid above the cutout 18 made in the burner body 6.
• the cutout 18 thus accommodates the gas injector 14 and allows an intake of primary air F1 on either side of the injector 14 under the second parallelepipedal portion 58.
• the body of burner 6 forms a primary air inlet chamber around the second injector 14 through the cutout 18.
• the conduit 15 which extends the second gas inlet 13 opens into the chamber air intake in the vicinity of the second injector 14.

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• 2015
  • 2015-11-30 WO PCT/FR2015/053260 patent/WO2017093615A1/fr unknown
  • 2015-11-30 US US15/780,127 patent/US10551057B2/en active Active
  • 2015-11-30 ES ES15807963T patent/ES2805468T3/es active Active
  • 2015-11-30 EP EP15807963.2A patent/EP3384208B1/de active Active

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