WO2022156046A1 - 火盖、燃烧器和燃气灶 - Google Patents

火盖、燃烧器和燃气灶 Download PDF

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Publication number
WO2022156046A1
WO2022156046A1 PCT/CN2021/078903 CN2021078903W WO2022156046A1 WO 2022156046 A1 WO2022156046 A1 WO 2022156046A1 CN 2021078903 W CN2021078903 W CN 2021078903W WO 2022156046 A1 WO2022156046 A1 WO 2022156046A1
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WO
WIPO (PCT)
Prior art keywords
fire cover
ring
fire
outer ring
peripheral wall
Prior art date
Application number
PCT/CN2021/078903
Other languages
English (en)
French (fr)
Inventor
潘福敏
朱运波
李忠华
陆祖安
Original Assignee
佛山市顺德区美的洗涤电器制造有限公司
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
Priority claimed from CN202120162971.1U external-priority patent/CN214406056U/zh
Priority claimed from CN202120158779.5U external-priority patent/CN214406171U/zh
Priority claimed from CN202120158776.1U external-priority patent/CN214406036U/zh
Priority claimed from CN202120163235.8U external-priority patent/CN214406049U/zh
Priority claimed from CN202110077920.3A external-priority patent/CN112815315B/zh
Priority claimed from CN202120162607.5U external-priority patent/CN214384389U/zh
Priority claimed from CN202110076246.7A external-priority patent/CN112815314B/zh
Priority claimed from CN202110077925.6A external-priority patent/CN112728542B/zh
Application filed by 佛山市顺德区美的洗涤电器制造有限公司 filed Critical 佛山市顺德区美的洗涤电器制造有限公司
Publication of WO2022156046A1 publication Critical patent/WO2022156046A1/zh

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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
    • 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
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
    • 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

Definitions

  • the present invention relates to the technical field of burners, in particular, to a fire cover, a burner and a gas stove.
  • the purpose of the present invention is to provide a new type of fire cover, burner and gas stove, which can greatly improve the comprehensive performance of the burner.
  • a first aspect of the present invention provides a fire cover, the fire cover includes:
  • a plurality of connecting spokes, any two adjacent sub-fire covers or between two adjacent sub-fire covers are connected by a plurality of connecting spokes arranged at intervals along the circumferential direction;
  • a plurality of fire holes are arranged on the sub-fire cover and the connecting spokes.
  • the plurality of sub-fire covers may be two and include:
  • the inner fire cover is set in the outer fire cover
  • a plurality of connecting spokes are arranged at intervals along the circumferential direction and are respectively connected to the outer fire cover and the inner fire cover.
  • the outer fire cover may include an outer fire cover outer peripheral wall and an outer fire cover inner peripheral wall disposed obliquely upward and inward, the inner fire cover including an inner fire cover inner peripheral wall inclined upward and inward and inclined
  • the outer peripheral wall of the inner fire cover is arranged upward and outward, and the plurality of fire holes on the inner peripheral wall of the outer fire cover, the plurality of fire holes on the inner peripheral wall of the inner fire cover, and the plurality of fire holes on the outer peripheral wall of the inner fire cover are respectively along the Circumferentially spaced.
  • the acute included angle between the inner peripheral wall of the outer fire cover and the horizontal plane may be greater than the acute included angle between the inner peripheral wall of the inner fire cover and the horizontal plane.
  • the plurality of fire holes on the inner peripheral wall of the outer fire cover may be spaced circumferentially and spaced apart in the height direction to form a plurality of outer fire hole rings; and/or, the fire holes on the outer peripheral wall of the inner fire cover A plurality of fire holes are arranged at intervals in the circumferential direction and spaced in the height direction to form a plurality of inner and outer fire hole rings; and/or, the plurality of fire holes on the inner peripheral wall of the inner fire cover are arranged in the circumferential direction and spaced in the height direction Arranged to form a plurality of inner ring inner fire hole rings.
  • the top edge height of the inner fire cover may be lower than the top edge height of the outer fire cover.
  • the top edge height of the inner fire cover may be lower than or equal to the bottom edge height of the inner peripheral wall of the outer fire cover, the fire holes on the outer fire cover, the fire holes on the connecting spokes, and the fire holes on the inner fire cover
  • the setting heights decrease sequentially.
  • the connecting spokes may be hollow cylindrical, and the barrel cavity connecting the spokes is a spoke cavity, and the two barrel ends of the connecting spokes are respectively connected to the outer fire cover and the inner fire cover.
  • the connecting spoke may be provided with a spoke cavity and include a spoke top wall defining the spoke cavity, a spoke bottom wall, and two spoke side walls connected between the spoke top wall and the spoke bottom wall, the two spoke sides
  • the walls are arranged at intervals in the circumferential direction, and the connecting positions of the two spoke side walls and the spoke top walls are respectively formed with inclined upward inclined wall portions, and a plurality of fire holes are arranged on the two inclined wall portions at intervals.
  • the two sloping wall portions may include a front sloping wall portion arranged clockwise towards the front and a rear sloping wall portion clockwise circumferentially rearward, a plurality of front sloping wall portions connecting the spokes
  • the rear side inclined wall portion of the connecting spoke or the plurality of spokes is formed as a bent wall.
  • an axially penetrating secondary air channel may be formed between any two adjacent connecting spokes and two corresponding adjacent sub-fire covers.
  • the connecting spokes may extend along the radial direction of the fire cover and the cross-sectional area of the connecting spokes perpendicular to the radial direction gradually decreases from outside to inside.
  • annular dividing cavity wall may be provided between the outer peripheral wall of the inner fire cover and the inner peripheral wall of the inner fire cover to divide the annular cavity of the inner fire cover into the middle annular cavity and the inner annular cavity
  • the annular cavity, the outer peripheral wall of the inner fire cover and the partition cavity wall jointly define the middle annular cavity, and the inner peripheral wall of the inner fire cover and the partition cavity wall jointly define the inner annular cavity.
  • the outer fire cover is provided with an outer ring cavity, and the outer ring cavity can communicate with the spoke cavity to which the spoke is connected.
  • the outer ring cavities, the spoke cavities, and the middle ring cavities may communicate sequentially.
  • the inner fire cover may further include an inner fire cover bottom wall that covers the lower opening of the central annular cavity.
  • the present invention also provides a burner comprising:
  • the burner head is arranged below the fire cover and is provided with an outer ring distribution air channel and an inner ring distribution air channel.
  • the inner ring distribution air channel is communicated with the inner ring cavity
  • the outer ring distribution air channel is communicated with the outer ring cavity.
  • the burner may further include an outer ring ejector tube, an inner ring ejector tube, an inner ring seat, a middle ring seat and an outer ring seat, and the inner ring seat, the middle ring seat and the outer ring seat are sequentially fitted from the inside to the outside And correspondingly are provided with an inner ring distribution airway, a middle ring distribution airway and the outer ring distribution airway, the middle ring distribution airway is communicated with the outer ring distribution airway through the middle and outer ring communication channel, the outer ring ejector tube, the outer ring distribution airway The air passage, the communication channel of the middle and outer rings and the distribution air passage of the middle ring are connected in sequence, and the ejection tube of the inner ring is communicated with the distribution air passage of the inner ring.
  • the middle-ring distribution air channel may communicate with the middle-ring cavity; or, the burner head may further include an inner-ring air channel cover detachably disposed on the middle-ring seat and covering the upper opening of the middle-ring distribution air channel.
  • the middle ring seat may include an inner circumferential wall of the middle ring seat and an outer circumferential wall of the middle ring seat defining a middle ring distribution air passage
  • the outer ring seat may include an inner circumferential wall of the outer ring seat and an outer circumferential wall of the outer ring seat defining an outer ring distribution air passage
  • the middle-outer ring communication channel extends radially and is connected between the outer peripheral wall of the middle-ring seat and the inner peripheral wall of the outer-ring seat.
  • the gas outlet of the outer ring ejector tube is arranged on the outer peripheral wall of the outer ring seat, the middle and outer ring communication channels and the outer ring ejector tube are both straight tubular and outward along the same radial direction Extending, the air inlet of the communication channel of the middle and outer ring is located on the inner peripheral wall of the outer ring seat, and the air outlet of the outer ring ejection pipe is directly opposite, and the area of the air inlet of the communication channel is smaller than the area of the outlet of the outer ring ejection pipe.
  • the outer and inner ring ejector tubes may extend radially and be circumferentially spaced.
  • the tube length of the inner ring ejector tube may be smaller than the tube length of the outer ring ejector tube; and/or, the tube length of the inner ring ejector tube outside the outer peripheral wall of the outer ring seat may be no longer than 15 cm.
  • a connecting top wall may be provided between the top peripheral edge of the outer peripheral wall of the middle ring base and the top peripheral edge of the inner peripheral wall of the outer ring base, and the connecting top wall is provided with an axially through top wall vent.
  • the inner ring seat may include an inner peripheral wall of the inner ring seat and an outer peripheral wall of the inner ring seat defining an inner ring distribution air passage
  • the middle ring seat may include an inner peripheral wall of the middle ring seat and an outer peripheral wall of the middle ring seat defining a middle ring distribution air passage
  • the outer peripheral wall of the inner ring seat and the inner peripheral wall of the middle ring seat are formed as a common inner ring shared peripheral wall.
  • the inner peripheral wall of the inner ring seat may be formed with an axially through central vent.
  • the burner may further include an outer ring ejector tube, an inner ring ejector tube, an outer ring seat and an inner ring seat, the outer ring seat is provided with an outer ring distribution air channel, and the inner ring seat is provided with an inner ring distribution The airway, the outer ring ejector tube is communicated with the outer ring distribution airway, and the inner ring ejector tube is communicated with the inner ring distribution airway.
  • the interface part of the outer ring ejector tube may be located at the bottom of the outer ring seat, and the outer ring ejector tube is connected to the outer ring distribution airway along the tangential direction, and the interface part of the inner ring ejector tube is located at the bottom of the inner ring seat.
  • the bottom and inner ring ejection tubes are connected to the inner ring distribution airway along the tangential direction, and the outer ring ejection tubes and the inner ring ejection tubes are arranged in parallel and spaced apart.
  • the burner may also include:
  • the air distribution plate is arranged between the outer fire cover and the outer ring seat and covers the outer ring cavity of the outer fire cover and the outer ring distribution air channel of the outer ring seat respectively.
  • the air distribution plate includes an annular disk peripheral wall, and the annular disk peripheral wall There are a plurality of primary air mixture through holes arranged at intervals in the circumferential direction and penetrating in the axial direction, and a plurality of secondary air holes arranged at intervals in the circumferential direction and penetrating in the radial direction, and the outer ring cavity of the outer fire cover passes through a plurality of The primary mixed gas through hole is communicated with the outer ring distribution air passage of the outer ring seat.
  • the number of secondary air holes may be greater than or equal to 10.
  • the cross-sectional area of the secondary air hole perpendicular to its axial direction is greater than or equal to 50 mm 2 and less than or equal to 120 mm 2 .
  • the number of primary air mixture via holes may be greater than or equal to 10, and the secondary air holes and primary air mixture via holes may be alternately distributed along the circumferential direction; A plurality of secondary air hole groups arranged at intervals along the circumferential direction and including at least two secondary air holes are formed, and the secondary air hole groups and the primary mixed gas through holes are alternately distributed in sequence along the circumferential direction.
  • the secondary air holes may be circular holes; alternatively, the secondary air holes may be waist-shaped holes with parallel waist edges of the waist-shaped holes arranged along the axial direction of the air distribution plate.
  • the burner may further include a pot support sleeved on the outside of the fire cover and the gas distribution plate, and the pot support includes:
  • Energy gathering disc in the form of a ring
  • bracket part which is arranged on the energy collecting plate and is used for supporting the cookware
  • a plurality of heat recovery fins are arranged on the bottom surface of the energy collecting disk and arranged at intervals along the circumferential direction, and a secondary air heat recovery channel is formed between any two heat recovery fins.
  • intermediate reinforcing fins may be connected between any two adjacent heat recovery fins.
  • the middle reinforcing fins may be T-shaped and include a wing plate and a web plate, two ends of the wing plate are respectively connected to the adjacent heat recovery fins, the web plate extends downward and the bottom edge The height is higher than the bottom edge height of the heat recovery fins.
  • a plurality of the heat recovery fins may be in the shape of flat sheets and extend radially; or, the plurality of heat recovery fins may be in the shape of curved sheets and arranged in a spiral shape.
  • the support portion may include a plurality of support feet disposed on the top surface of the energy collecting disk and spaced circumferentially.
  • the energy concentrating disc may include a concentric first energy concentrating disc and a second energy concentrating disc arranged one above the other, the disc bottom surface of the first energy concentrating disc and the disc top surface of the second energy concentrating disc jointly defining a spacer In the thermal cavity, a plurality of support feet are arranged on the top surface of the first energy collecting disc, and a plurality of heat recovery fins are arranged on the disc bottom surface of the second energy collecting disc.
  • the annular disk wall of the first energy concentrating disk may be formed with an annular lower groove; or, the bottom surface of the second energy concentrating disk may protrude downward with a plurality of supporting feet.
  • the present invention also provides a combustion stove, which includes the above-mentioned burner.
  • the fire cover, the burner and the gas stove of the present application have good comprehensive performance, and include a plurality of connecting spokes and a plurality of sub-fire covers, the plurality of sub-fire covers are annular and nested with each other, and the plurality of connecting spokes are connected to each other at intervals in the circumferential direction. Any two adjacent sub-fire covers or a plurality of connecting spokes are connected between two adjacent sub-fire covers at intervals along the circumferential direction, and fire holes are provided on both the sub-fire covers and the connecting spokes.
  • the fire cover forms a multi-ring flame, and the connecting spokes also form a flame at the gap between the two adjacent flames, so that the flame can be evenly distributed on the entire fire plane, effectively improving the uniform heating performance of the burner.
  • the number of fire holes in the fire cover is greatly increased, and the heat load can be fully released, which is beneficial to improve the heat load of the burner; at the same time, the flame connecting the spokes extends inward, which is beneficial to improve the overall efficiency of the burner.
  • a plurality of connecting spokes are connected between two adjacent sub-fire covers, which is more beneficial to increase the speed of fire transmission and the stability of ignition.
  • FIG. 1 and FIG. 3 respectively show the schematic structural diagrams of the burner according to the first specific embodiment of the present invention under different viewing angles;
  • Fig. 2 is the installation exploded view of the burner of Fig. 1;
  • Fig. 4 and Fig. 5 are respectively the structural representation of the fire cover in Fig. 2 under different viewing angles;
  • Fig. 6 and Fig. 7 are respectively the structural schematic diagram of the gas distribution plate in Fig. 2 under different viewing angles;
  • Fig. 8 is the structural representation of the burner in Fig. 2;
  • FIG. 9 and 11 are respectively sectional views of the burner in FIG. 1 at different positions, wherein the pan support is not shown in the figures;
  • Fig. 10 is the exploded view of Fig. 9;
  • FIG. 12 is a schematic structural diagram of a burner according to a second specific embodiment of the present invention.
  • Figure 13 is an exploded view of the installation of the burner of Figure 12 at different angles;
  • Fig. 14 and Fig. 15 are respectively the structural schematic diagrams of the fire cover in Fig. 13 under different viewing angles;
  • Fig. 16 and Fig. 17 are respectively a schematic structural diagram of the air distribution plate in Fig. 13 from another viewing angle;
  • FIG. 18 is a schematic structural diagram of the airway cover in FIG. 13;
  • Figure 19 is an exploded view of the installation of the burner in Figure 13;
  • Figures 20 and 22 are respectively sectional views of the burner in Figure 12 at different positions, wherein the pan support is not shown in the figures;
  • Figure 21 is the exploded view of Figure 20;
  • FIG. 23 is a schematic structural diagram of a burner according to a third embodiment of the present invention.
  • Figure 24 and Figure 25 are respectively exploded views of the installation of the burner of Figure 23 from different viewing angles;
  • 26 and 27 are schematic structural views of the pan support in FIG. 23 from different viewing angles;
  • Figure 28 is a cross-sectional view of the pan support in Figure 26;
  • Fig. 29 is an exploded view of the pot support in Fig. 26, wherein a middle reinforcing fin is added between any two adjacent heat recovery fins.
  • the inventors of the present application have found that the existing burners pay more and more attention to the performance of high heat load and high thermal efficiency, but do not pay enough attention to the heating performance of uniform fire.
  • the ingredients in the local area of the appliance are unevenly heated and scorched, which seriously affects the cooking effect of the ingredients and the user's dietary health.
  • the oil fume volatilized in the air after the ingredients are scorched at high temperature contains more carcinogens, which brings great harm to human health and also seriously affects the cooking experience of users.
  • the inventors of the present application have made continuous thinking and research to provide a burner that can greatly improve the heating performance of a uniform fire, thereby bringing users a healthy eating style and cooking experience.
  • the fire cover 100 of the present application includes a plurality of sub fire covers and a plurality of connecting spokes 101.
  • the plurality of sub fire covers are all annular, and the diameters of the plurality of sub fire covers are different and radially spaced from the inside to the outside.
  • the fire covers or two adjacent sub-fire covers are connected by a plurality of connecting spokes 101 arranged at intervals in the circumferential direction, and the sub fire covers and the connecting spokes 101 are both provided with a plurality of fire holes 104 .
  • a secondary air passage 105 is formed between any two adjacent connecting spokes 101 and two corresponding adjacent sub-fire covers, so that the secondary air required for combustion can be supplemented upward through the secondary air passage 105 .
  • connecting spokes 101 with fire holes 104 are arranged between two adjacent sub-fire covers.
  • a plurality of sub-fire covers form a multi-ring flame
  • the connecting spokes 101 also form a flame at the gap between the adjacent two-ring flames, so that the flame can be evenly distributed on the entire fire plane, thereby improving the burner more effectively.
  • the uniform fire heating performance also makes the structure of the fire cover more compact on the basis of increasing the heat load. Among them, the flame is not actually distributed along the plane, but distributed in space, so the fire plane can be understood as the horizontal projection plane of the flame.
  • the fire hole 1045 on the sub-fire cover communicates with the annular cavity of the sub-fire cover, and the fire hole 104 on the connecting spoke 101 communicates with the spoke cavity 1013 connecting the spoke 101 .
  • the plurality of sub-fire covers may include two, three, four or more that are nested in sequence, so that the burner 1000 may form a flame of two rings, three rings, four rings or more.
  • the multiple sub-fire covers may be arranged concentrically and radially spaced apart, that is, the center points of the multiple sub-fire covers are on the same vertical line, or, the multiple sub-fire covers may not be arranged concentrically, that is, the center points of the multiple sub-fire covers may be Partially offset and not on the same vertical line.
  • any adjacent two sub-fire covers may be connected by a plurality of connecting spokes 101 arranged at intervals in the circumferential direction, for example, any adjacent two sub-fire covers may be connected by four, five, six or more
  • the connecting spokes 101 arranged at intervals in the circumferential direction are connected, so that the fire cover 100 can not only greatly improve the uniform heating performance of the burner 1000, but also make the fire cover 100 can be formed as a whole, which is convenient for users to remove, wash and install.
  • the present application is not limited to this, and the fire cover 100 can also be set in a split form according to the actual application scenario, that is, only a plurality of connecting spokes arranged at intervals along the circumferential direction are only arranged between two adjacent fire covers. 101.
  • the connecting spokes 101 may be hollow cylindrical, and the barrel cavity connecting the spokes 101 is the spoke cavity 1013 , and the two barrel ends of the connecting spokes 101 are respectively connected to the outer fire cover 103 and the inner fire cover 102 .
  • the connecting spokes 101 can be in the shape of a hollow cylinder, a hollow square cylinder, or other hollow irregular cylinders. As shown in FIG. 5 , the connecting spokes 101 are hollow and approximately cone-shaped.
  • each sub-fire cover is provided with a sub-fire cover cavity, and the fire hole 104 on the sub-fire cover communicates with the corresponding sub-fire cover cavity; each connecting spoke 101 is provided with a spoke cavity 1013, which is connected to the fire hole on the spoke 101.
  • the spoke cavity 1013 can be communicated with one or two adjacent sub-fire cover cavities.
  • the burner head can only be provided with a sub-fire cover distribution air channel, and the sub-fire cover cavity and the spoke cavity 1013 share the sub-fire cover distribution air channel, so that it can be Correspondingly, the air supply and distribution air passages of the burner head are reduced; of course, the spoke cavity 1013 may not be communicated with the adjacent sub-fire cover cavities.
  • the burner head can be provided with a sub-fire cover distribution air passage and a spoke cavity distribution air passage accordingly.
  • the present application is not limited to this.
  • the number of fire holes 104 of the fire cover 100 is greatly increased, and the heat load can be fully released, which is beneficial to improve the heat load performance of the burner.
  • the thermal efficiency is higher, and the flames of the plurality of connecting spokes 101 of the present application extend inward, which is beneficial to improve the overall thermal efficiency of the burner.
  • the existing burner usually only ignites at a certain position on a certain ring fire cover, and then the flame spreads slowly in a circle around the circumference. And pollute the environment of the kitchen, and even sometimes, due to the strong wind or the existence of droplets, there will be a situation where the point is not visible, affecting the user's experience.
  • the fire cover 100 of the present application is provided with a plurality of connecting spokes 101 at intervals in the circumferential direction between the two adjacent fire covers, when igniting, the flame can simultaneously propagate from the plurality of connecting spokes 101, which is equivalent to More ignition points are added on the entire fire cover 100, so that the effect of instant ignition can be achieved, the speed of fire transmission and the stability of ignition are greatly increased, and the user experience is also better.
  • the number of the plurality of sub-fire covers may be two and includes an outer fire cover 103 and an inner fire cover 102 , and the inner fire cover 102 is sleeved on the outer fire cover at radial intervals.
  • a plurality of connecting spokes 101 are arranged at intervals in the circumferential direction and connect the outer fire cover 103 and the inner fire cover 102 respectively.
  • a secondary air channel 105 may be formed between any two adjacent connecting spokes 101 , the outer fire cover 103 and the inner fire cover 103 , so that the secondary air required for combustion can be supplemented upward through the secondary air channel 105 .
  • the structure of the fire cover 100 is simple, which can make the flame spread more evenly on the entire fire plane, which can greatly improve the uniform fire heating performance of the burner and improve the heat load and thermal efficiency of the burner.
  • the inner fire cover 102 and the outer fire cover The cover 103 becomes a whole, which is convenient for users to remove, wash and install.
  • the outer fire cover 103 may include an outer fire cover outer peripheral wall 1032 and an outer fire cover inner peripheral wall 1031, the outer fire cover inner peripheral wall 1031 is inclined upward and inwardly disposed and a plurality of fire holes are formed on the outer fire cover inner peripheral wall 1031 104 are arranged at intervals in the circumferential direction, the inner fire cover 102 includes an inner fire cover inner peripheral wall 1021 and an inner fire cover outer peripheral wall 1022, and the outer fire cover inner peripheral wall 1031, the inner fire cover A plurality of circumferentially spaced fire holes 104 are provided.
  • the inner peripheral wall 1021 of the inner fire cover is inclined upward and inwardly arranged, and the plurality of fire holes 104 on the inner peripheral wall 1021 of the inner fire cover are arranged at intervals in the circumferential direction, and the outer peripheral wall 1022 of the inner fire cover is inclined upward and outwardly arranged and the inner fire cover is arranged at intervals.
  • the plurality of fire holes 104 on the peripheral wall 1022 are circumferentially spaced apart.
  • the outer fire cover outer peripheral wall 1032 of the outer fire cover 103 is not provided with fire holes, and only fire holes 104 are provided on the inner peripheral wall 1031 of the outer fire cover, which can produce a flame gathering effect, and also make the flame toward the center.
  • the inner fire cover 102 is located at the center of the fire cover 100 , and both the inner peripheral wall 1021 of the inner fire cover and the outer peripheral wall 1022 of the inner fire cover can be provided with fire holes 104 to increase the number of the fire holes 104 as much as possible.
  • the inner peripheral wall 1031 of the outer fire cover, the inner peripheral wall 1021 of the inner fire cover and the outer peripheral wall 1022 of the inner fire cover are inclined and arranged, that is, the plurality of fire holes 104 are also inclined toward the fire, which is more conducive to the uniformity of the flame in the entire combustion space, and also has It is beneficial to the mixing of the primary mixed gas and the secondary air, thereby improving the combustion efficiency.
  • a position relatively close to the center of the fire cover 100 is defined as "inner”
  • a position relatively far from the center of the fire cover 100 is defined as "outer”.
  • the primary mixed gas is the mixed gas of fuel gas and primary air.
  • the acute angle between the inner peripheral wall 1031 of the outer fire cover and the horizontal plane can be correspondingly increased, so that the inner peripheral wall 1031 of the outer fire cover can be correspondingly increased.
  • the inclination increases; and the diameter of the inner fire cover 102 is small, in order to weaken the impact of the inner ring flames at the radially opposite positions of the inner fire cover 102 on each other, the acute angle between the inner peripheral wall 1021 of the inner fire cover and the horizontal plane can be Accordingly, the inclination of the inner peripheral wall 1021 of the inner fire cover is reduced.
  • the acute angle between the inner peripheral wall 1031 of the outer fire cover and the horizontal plane is greater than the acute angle between the inner peripheral wall 1021 of the inner fire cover and the horizontal plane.
  • the orientation angles of the three peripheral walls of the inner peripheral wall 1031 of the outer fire cover, the inner peripheral wall 1021 of the inner fire cover and the outer peripheral wall 1022 of the inner fire cover are different, which can make the fire holes 104 on the three peripheral walls have different directions of the fire in space, and further can It makes the arrangement of the flame in the whole combustion space more uniform.
  • a plurality of fire holes 104 on the inner peripheral wall 1031 of the outer fire cover are arranged at intervals in the circumferential direction and spaced apart in the height direction to form a plurality of outer fire hole rings; and/or, the fire holes on the outer peripheral wall 1022 of the inner fire cover
  • the plurality of fire holes 104 are arranged circumferentially and spaced apart in the height direction to form a plurality of inner and outer fire hole rings; and/or, the plurality of fire holes 104 on the inner peripheral wall 1021 of the inner fire cover are arranged circumferentially and along the They are spaced apart in the height direction to form a plurality of inner ring inner fire hole rings.
  • a plurality of outer fire orifice rings are arranged at intervals in the height direction, and/or, on the outer peripheral wall 1022 of the inner fire cover, a plurality of inner and outer fire hole rings are arranged at intervals in the height direction; and/or, On the inner peripheral wall 1021 of the inner fire cover, a plurality of inner ring inner fire hole rings are arranged at intervals along the height direction.
  • the number of fire holes 104 can be increased by setting multiple fire hole rings, which further improves the heat of the burner. load.
  • the fire holes between two adjacent fire hole rings can also be staggered in the circumferential direction, so that the flame can be prevented from accumulating at a certain circumferential position.
  • the inner peripheral wall 1031 of the outer fire cover is provided with two outer fire hole rings
  • the outer peripheral wall 1022 of the inner fire cover is provided with two inner and outer fire hole rings
  • the inner fire cover is provided with two outer fire hole rings.
  • An inner ring inner fire hole ring is arranged on the inner peripheral wall 1021 .
  • the present application is not limited to this, and two, three, four or more may be provided on the inner peripheral wall 1031 of the outer fire cover and/or the outer peripheral wall 1022 of the inner fire cover and/or the inner peripheral wall 1021 of the inner fire cover according to actual needs.
  • a fire hole ring; the height interval between two adjacent fire hole rings can be the same or different, and can be set reasonably according to the actual use needs.
  • the height of the top edge of the inner fire cover 102 may be lower than the height of the top edge of the outer fire cover 103, so that the fire holes 104 of the outer fire cover 103 and the fire holes 104 on the inner fire cover 102 in the vertical direction
  • the height positions are at least partially staggered to prevent the flame of the outer fire cover 103 and the flame of the inner fire cover 102 from accumulating at the same height position, and also enable the flame to burn in a larger space, so that there is more secondary air in the space, and the combustion The efficiency is higher and the heat load can be fully discharged.
  • the bottom edge height of the outer fire cover 103 may be higher than, equal to or lower than the top edge height of the inner fire cover 102 .
  • the height positions of the fire holes 104 on the outer fire cover 103 and the fire holes 104 on the inner fire cover 102 in the vertical direction may partially overlap layout.
  • top edge height of the top edge of the inner fire cover 102 is lower than or equal to the bottom edge height of the bottom edge of the inner peripheral wall 1031 of the outer fire cover. In this way, the fire holes 104 on the outer fire cover 103 and the inner fire cover The height positions of the fire holes 104 on the 102 in the vertical direction can be completely staggered and overlapped.
  • the heights of the fire holes 104 on the outer fire cover 103, the fire holes 104 on the connecting spokes 101, and the fire holes 104 on the inner fire cover 102 are successively decreased, so that the fire holes 104 of the entire fire cover 100 in the vertical direction
  • the height positions can be staggered and overlapped, which further enables the flame to burn in a larger space, avoids flame accumulation, makes the secondary air easier to enter, the combustion efficiency is higher, and the heat load can be fully released.
  • the connecting spoke 101 includes a spoke top wall defining a spoke cavity 1013, a spoke bottom wall, and two spoke side walls connected between the spoke top wall and the spoke bottom wall, the two spoke side walls being circumferentially spaced apart
  • the connection positions of the two spoke side walls and the spoke top wall are respectively formed with inclined wall portions inclined upward, and a plurality of fire holes 104 are arranged on the two inclined wall portions at intervals.
  • the plurality of fire holes 104 on the two inclined walls communicate with the spoke cavities 1013 connecting the spokes 101 . As shown in FIG.
  • the fire holes 104 on the two inclined wall portions are provided with opposite directions in the circumferential direction, so that the fire outlet direction angle of the fire cover 100 increases in space, and the flame can be more uniformly dispersed throughout the entire In space, the combustion efficiency is higher, and the heat load can be fully released.
  • the fire holes 104 are arranged on the inclined walls connecting the spokes 101, which can make the flame spread obliquely, thereby improving the ignition effect between each other. Fire hole lit.
  • the two inclined wall portions include a front inclined wall portion 1011 arranged clockwise toward the front and a rear inclined wall portion 1012 arranged clockwise toward the rear.
  • the front inclined wall portion 1011 or the plurality of rear inclined wall portions 1012 connecting the spokes 101 are formed as a bent wall, and a plurality of fire holes 104 are arranged at intervals on the bent wall.
  • multiple folded walls with the same orientation can form a swirling flame effect, and the flames with the same direction of fire can produce a certain turbulence effect on the combustion area, which can promote the uniform distribution of secondary air and improve combustion efficiency.
  • the swirling flame effect formed by the plurality of bending walls with the same orientation visually makes the flame produce a sense of rotating motion, which is more beautiful.
  • the fire cover 100 may only be provided with two ring cavities and a plurality of spoke cavities 1013 , that is, when the outer fire cover 103 is provided with the outer ring cavity 1033 , the connecting spokes 101 are provided with the spoke cavities 1013 , and the inner fire cover 102 is provided
  • the spoke cavity 1013 may communicate with the inner ring cavity 1024 or the spoke cavity 1013 may communicate with the outer ring cavity 1033 of the outer fire cover 103 .
  • the spoke cavity 1013 connecting the spokes 101 can introduce the primary mixed gas from the inner ring cavity 1024 of the inner fire cover 102 or the outer ring cavity 1033 of the outer fire cover 103 .
  • the fire cover 100 may be provided with three ring cavities and a plurality of spoke cavities 1013 , and in this case, between the inner fire cover outer peripheral wall 1022 of the inner fire cover 102 and the inner fire cover inner peripheral wall 1021 of the inner fire cover 102 An annular dividing cavity wall 1023 may be provided to divide the annular cavity of the inner fire cover 102 into a middle annular cavity 1025 and an inner annular cavity 1024.
  • the cap inner peripheral wall 1021 and the dividing cavity wall 1023 together define an inner annular cavity 1024 . As shown in FIGS.
  • the fire holes 104 on the outer peripheral wall 1022 of the inner fire cover communicate with the middle ring cavity 1025
  • the fire holes 104 on the inner peripheral wall 1021 of the inner fire cover communicate with the inner ring cavity 1024 .
  • the middle ring cavity 1025 is disposed close to the inner ring cavity 1024 , so that the inner fire cover 102 can form two rings of flames at the center of the fire cover 100 , thereby making the fire power greater, the heat load higher, and the flame more uniformly dispersed.
  • the outer fire cover 103 is provided with an outer ring cavity 1033, and the middle ring cavity 1025 and the inner ring cavity 1024 are integrated in the inner fire cover 102, that is, the inner and outer fire covers form a three-ring cavity, which is not only more concise and compact in structure, but also It can save sheet metal materials and reduce production costs.
  • the spoke cavity 1013 connecting the spokes 101 may communicate with the outer ring cavity 1033 of the outer fire cover 103 or the spoke cavity 1013 connecting the spoke 101 may communicate with the middle ring cavity 1025 of the inner fire cover 102, thus, the spoke cavity connecting the spoke 101 1013 can introduce the primary mixed gas from the outer ring cavity 1033 of the outer fire cover 103 or the middle ring cavity 1025 of the inner fire cover 102 .
  • the fire cover 100 can introduce part of the primary mixture in the outer ring cavity 1033 into the spoke cavity 1013 relatively close to the center of the combustion area. combustion, so that the combustion efficiency of the entire burner can be improved.
  • the outer ring cavity 1033 and the spoke cavity 1013 can share the primary mixed gas distribution air channel and the injection channel, that is, the primary mixed gas of the outer ring cavity 1033 and the spoke cavity 1013 can be supplied by the same gas nozzle and intake channel, not only Synchronous adjustment can be achieved, and with a simple valve control strategy, the entire flame surface can be synchronously adjusted, which simplifies the control logic and helps reduce the production cost of the burner.
  • the plurality of connecting spokes 101 can increase the airflow passage of the burner, which is beneficial to the uniform arrangement of airflow and stable combustion.
  • the outer ring cavity 1033 , the spoke cavity 1013 and the middle ring cavity 1025 can be connected in sequence, so that the primary gas mixture in the outer ring cavity 1033 can be introduced into the middle ring cavity 1025 of the inner fire cover 102 near the combustion center area through the spoke cavity 1013 Combustion, further improving the overall combustion efficiency of the burner.
  • the fire cover 100 can form a three-ring flame only by supplying gas from the two injection pipes of the inner ring injection pipe and the outer ring injection pipe and the two gas nozzles of the inner ring gas nozzle and the outer ring gas nozzle.
  • the primary mixed gas of the ring cavity 1033, the spoke cavity 1013 and the middle ring cavity 1025 can be supplied by the same gas nozzle and intake channel, further realizing synchronous adjustment, and the valve regulation strategy and control logic can also be simpler. Moreover, the three-ring gas supply of the burner is realized without adding additional nozzles and ejection pipes, which not only simplifies the control logic and structure, but also greatly reduces the production cost of the burner.
  • the plurality of spoke cavities 1013 are auxiliary channels for the outer ring cavity 1033 and the middle ring cavity 1025, which further facilitates the uniform arrangement of airflow and stable combustion.
  • outer ring cavity 1033 and the middle ring cavity 1025 are communicated through a plurality of spoke cavities 1013, which can reduce the pressure difference in different areas in the combustion space, and reduce the back pressure, so that the fire can be fired more uniformly, and the uniformity of the combustion can also be improved, so that the The flame spreads more evenly throughout the space.
  • the outer ring cavity 1033, the spoke cavity 1013 and the middle ring cavity 1025 are connected in sequence. At this time, the two injection pipes of the inner ring injection pipe and the outer ring injection pipe, as well as the two gas nozzles of the inner ring gas nozzle and the outer ring gas nozzle can be supplied accordingly.
  • Three ring cavities and a plurality of spoke cavities 1013 supply gas, and the outer ring cavities 1033, the spoke cavities 1013, the middle ring cavities 1025 and the inner ring cavities 1024 can form three ring flames and a plurality of intermediate flames, which ensures that the burner 200 has A high enough heat load for high-fire cooking can also make the burner more uniform and thermally efficient.
  • the outer ring gas nozzle does not supply gas to the outer ring cavity 1033 and the middle ring cavity 1025, that is, the flames corresponding to the outer ring cavity 1033 and the middle ring cavity 1025 are extinguished.
  • the inner ring ejector tube and the inner ring gas nozzle supply gas to the inner ring cavity 1024 so that only the inner ring cavity 1024 can form an inner ring flame, so as to realize low-fire cooking.
  • the middle ring cavity 1025 is arranged close to the inner ring cavity 1024, the high heat load and uniform fire requirement of the inner ring combustion area during high-fire cooking are ensured. Therefore, the inner ring gas nozzle that supplies gas to the inner ring cavity 1024 can be made as small as possible. , so as to provide smaller firepower during low-fire cooking, meet the user's needs for low-fire cooking with low firepower, and provide a better user experience.
  • the connecting spokes 101 extend along the radial direction of the fire cover 100, so that the arrangement path of the connecting spokes 101 between the outer fire cover 103 and the inner fire cover 102 can be the shortest, the flow resistance can be reduced, and the outer ring cavity 1033 can be The primary mixed gas can enter the middle ring cavity 1025 through the spoke cavity 1013 more smoothly.
  • the area of the cross section of the connecting spokes 101 perpendicular to the radial direction gradually decreases from the outside to the inside, which can ensure that the secondary air passage 105 has sufficient passage area, so that the secondary air can be better replenished upward.
  • the fire cover 100 may also be provided with a fire stabilizing groove 106 for stabilizing the combustion of the flame. As shown in FIG. There is a strip fire-stabilizing slot.
  • the multiple sub-fire covers can be three, four, five or more.
  • the spoke chambers 1013 can be communicated with the sub-fire cap chambers adjacent to the two ends of the spoke chamber 1013 respectively. In this way, the number of nozzles and distribution air passages can be reduced, which is beneficial to simplify the control logic and the structure of the burner. And can reduce the production cost of the burner, improve the combustion efficiency and heat load of the burner.
  • the fire cover 100 of the present application not only has good comprehensive performance, but also has a reasonable and simple structure.
  • the present application also provides a burner 1000 , the burner 1000 includes the above-mentioned fire cover 100 and a burner head 200 located under the fire cover 100 for gas supply.
  • the specific structure of the fire cover 100 refers to the above-mentioned embodiments. Since the burner 1000 of the present application adopts all the technical solutions of the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments. Repeat them one by one.
  • the burners 1000 configured in the burner 1000 are also different correspondingly.
  • the fire cover 100 may only be provided with two ring cavities and a plurality of spoke cavities 1013, that is, if the outer fire cover 103 is provided with an outer ring cavity 1033, the connecting spokes 101 are provided with spoke cavities 1013, and the inner fire cover 102 is provided with only an inner ring
  • the cavity 1024, the spoke cavity 1013 can be communicated with the inner ring cavity 1024 of the inner fire cover 102 or the spoke cavity 1013 can be communicated with the outer ring cavity 1033 of the outer fire cover 103.
  • the burner 200 can only be provided with an outer ring distribution air channel.
  • the fire cover 100 can be commonly used on the burner head 200 provided with the two-ring distribution air passages, without additionally adding an independent distribution air passage for supplying air to the spoke cavity 1013 on the burner head.
  • the fire cover 100 may be provided with three ring cavities and a plurality of spoke cavities 1013, that is, if the outer fire cover 103 is provided with an outer ring cavity 1033, the connecting spokes 101 are provided with a spoke cavity 1013, and the inner fire cover 102 is provided with an inner ring cavity 1024 and the middle ring cavity 1025, the spoke cavity 1013 connecting the spokes 101 can communicate with the outer ring cavity 1033 of the outer fire cover 103; alternatively, the spoke cavity 1013 connecting the spokes 101 can communicate with the middle ring cavity 1025 of the inner fire cover 102; The cavity 1033, the spoke cavity 1013 and the middle ring cavity 1025 can be communicated in sequence.
  • the burner head 200 may be a burner head with three distribution air passages in sequence, an inner ring distribution air passage 2011 , a middle ring distribution air passage 2021 and an outer ring distribution air passage 2031 , or the burner head 200 may be provided with only an outer ring distribution air passage 2031 .
  • the ring distribution air channel 2031 and the inner ring distribution air channel 2011 are the furnace heads of the two distribution air channels.
  • the burner 200 is sequentially provided with three distribution air passages, an inner ring distribution air passage 2011 , a middle ring distribution air passage 202 and an outer ring distribution air passage 2031 , the inner ring distribution air passage 2011 , the middle ring distribution air passage 2021 and the outer ring distribution air passage 2011 2031 corresponds to the inner ring cavity 1024, the middle ring cavity 1025 and the outer ring cavity 1033 of the fire cover 100.
  • the spoke cavity 1013 is communicated with the outer ring cavity 1033, the outer ring distribution air passage 2031 can pass through the outer ring cavity 1033 to the spoke cavity 1013.
  • middle ring distribution airway 2021 can supply primary mixed gas to spoke cavity 1013 through middle ring cavity 1025; when outer ring cavity 1033, spoke cavity 1013 and middle ring cavity 1025 are connected in sequence , the outer ring distribution airway 2031 can supply primary mixed gas to the spoke cavity 1013 through the outer ring cavity 1033 and/or the middle ring distribution airway 2021 can supply primary mixed gas to the spoke cavity 1013 through the middle ring cavity 1025 .
  • the fire cover 100 of the three ring cavities can be commonly used on the burner head 200 provided with the three-ring distribution air passages, without the need for additional distribution air passages for independently supplying the spoke cavities 1013 on the burner head.
  • the inner fire cover 102 of the fire cover 100 also needs to correspondingly include the inner fire cover bottom wall 1026 that covers the lower opening of the middle ring cavity 1025.
  • the outer ring distribution air channel 2031 can The primary mixed gas is supplied to the spoke cavity 1013 through the outer ring cavity 1033; when the outer ring cavity 1033, the spoke cavity 1013 and the middle ring cavity 1025 are connected in sequence, the outer ring distribution air passage 2031 can pass the outer ring cavity 1033 to the spoke cavity 1013 and the middle ring cavity 1025 for primary mixed gas.
  • the fire cover 100 of the three ring cavities can be commonly used on the burner head 200 provided with the two-ring distribution air passages, without the need for additional distribution air passages for independently supplying air to the spoke cavities 1013 on the burner head.
  • the fire cover 100 of the present application has good versatility, and can be adapted to a variety of different burners 200.
  • the burner 1000 of the present application will be described below with examples.
  • the burner 1000 of the first embodiment is the burner 1000 of the first embodiment:
  • the burner head 200 is provided with an inner ring distribution air passage 2011 , a middle ring distribution air passage 2021 and an outer ring distribution air passage 2031 , and the fire cover 100 can cooperate with It is used on the burner 200 provided with three distribution air passages, an outer ring distribution air passage 2031 , a middle ring distribution air passage 2021 and an inner ring distribution air passage 2011 , to form a three-ring flame.
  • the middle ring distribution airway 2021 is located between the inner ring distribution airway 2011 and the outer ring distribution airway 2031 .
  • the outer ring distribution airway 2031 is communicated with the outer ring cavity 1033
  • the middle ring distribution airway 2021 is communicated with the middle ring cavity 1025
  • the inner ring distribution airway 2011 is communicated with the inner ring cavity 1024 .
  • the three distribution air passages of the burner head 200 can supply gas stably to the three annular cavities of the fire cover 100 correspondingly, and the fire is more stable and reliable.
  • the middle-ring distribution air channel 2021 can be communicated with the outer-ring distribution air channel 2031 through the middle-outer ring communication air channel 206, and the burner 200 also includes an inner-ring ejection tube 204 and an outer-ring ejection tube 205, and the inner-ring ejection tube 205.
  • the pipe 204 communicates with the inner ring distribution airway 2011
  • the outer ring ejector tube 205 is sequentially connected to the outer ring distribution airway 2031 , the middle and outer ring communication airway 206 and the middle ring distribution airway 2021 .
  • the outer ring ejector tube 205 can sequentially provide primary mixed gas to the outer ring distribution air passage 2031 and the middle ring distribution air passage 2021 .
  • the burner head 200 of this embodiment introduces the primary mixed gas from the outer ring distribution air passage 2031 into the middle ring distribution air passage 2021 relatively close to the central combustion area, which is beneficial to improve the The overall combustion efficiency of the burner.
  • the burner head 200 of the present embodiment only needs two ejector tubes to supply air to three distribution air passages to form a three-ring fire, which not only makes the structure of the burner head 200 simpler, but also reduces the number of ejection tubes and the The number of settings for production parts such as nozzles greatly saves production costs and facilitates later maintenance.
  • the burner 200 of this embodiment only needs two ejector tubes to supply gas to the three distribution air passages, and the valve regulation strategy and control logic can also be simpler.
  • the distribution air channel 2021 in the middle ring is connected with the distribution air channel 2031 in the outer ring.
  • the inner ring ejector tube 204 and the outer ring ejector tube 205 supply air to the three distribution air passages correspondingly.
  • the inner ring distribution air passage 2011, the middle ring distribution air passage 2021 and the outer ring distribution air passage 2031 correspond to form a three-ring flame, which ensures that the burner 200 has a The heat load is high enough for high-fire cooking, and the uniformity and thermal efficiency of the three-ring flame heating are better.
  • the inner ring ejector tube 204 does not supply air to the outer ring distribution airway 2031 and the middle ring distribution airway 2021, that is, the outer ring distribution airway 2031 and the outer ring distribution airway 2021.
  • the flame corresponding to the middle ring distribution air passage 2021 is extinguished, and only the inner ring ejector tube 204 supplies air to the inner ring distribution air passage 2011 so that only the inner ring distribution air passage 2011 can form an inner ring flame and realize low-fire cooking.
  • the middle-ring distribution air duct 2021 is arranged close to the inner-ring distribution air duct 2011 , the high heat load and uniform fire requirements of the inner-ring combustion area during high-fire cooking are ensured, so the inner ring that supplies air to the inner-ring distribution air duct 2011
  • the gas nozzle can be made as small as possible, so that it can provide less fire power during low-fire cooking, meet the user's needs for low-fire cooking with low fire power, and provide a better user experience.
  • the burner 200 of this embodiment may include an inner ring seat 201 , a middle ring seat 202 and an outer ring seat 203 that are sheathed in sequence, and the outer ring seat 203 may include a distribution air passage 2031 defining an outer ring
  • the inner peripheral wall 2032 of the outer ring seat, the outer peripheral wall 2033 of the outer ring seat and the bottom wall 2034 of the outer ring seat, the middle ring seat 202 may comprise the inner peripheral wall of the middle ring seat, the outer peripheral wall 2023 of the middle ring seat and the bottom wall 2022
  • the inner ring seat 201 may include an inner ring seat inner peripheral wall 2012 , an inner ring seat outer peripheral wall 2013 and an inner ring seat bottom wall 2015 that define the inner ring distribution air passage 2011 .
  • the arrangement form and arrangement position of the middle communication channel can be various, for example, the middle communication channel can be a curved channel, and the two ends are respectively connected with the outer ring seat bottom wall 2034 and the middle ring seat bottom wall 2022 to correspond to the outer ring distribution air channel 2031 is communicated with the middle ring distribution air passage 2021; alternatively, the middle communication passage can also be a curved passage and the two ends are respectively connected with the outer ring seat bottom wall 2034 and the middle ring seat outer peripheral wall 2023 to correspond to the outer ring distribution air passage 2031 and the middle ring distribution air passage 2021 Connectivity et al. Alternatively, as shown in FIG.
  • the middle communication channel may be a middle-outer ring communication air passage 206 radially disposed between the outer peripheral wall 2023 of the middle ring seat and the inner peripheral wall 2032 of the outer ring seat, and the middle and outer rings communicate with the air passage 206
  • the straight channel can not only make the structure of the burner 200 simpler and more reasonable, but also set the middle-outer ring communication air channel 206 as a straight channel, so as to shorten the channel length and reduce the flow resistance as much as possible.
  • only one middle-outer ring communication air passage 206 is shown in FIG.
  • middle-outer ring communication air passages 206 can also be multiple and are arranged on the outer peripheral wall 2023 of the middle ring seat at intervals in the circumferential direction and the inner peripheral wall 2032 of the outer ring seat.
  • the outer peripheral wall 2013 of the inner ring seat and the inner peripheral wall of the middle ring seat may be formed as a common inner ring common peripheral wall.
  • the middle-ring distribution air passage 2021 can be arranged closer to the inner-ring distribution air passage 2011 , so that the flame of the middle-ring distribution air passage 2021 can be burned closer to the central area, and the thermal efficiency is higher.
  • the inner ring gas nozzle can be made as small as possible, so as to provide smaller firepower during low-fire cooking.
  • outer peripheral wall 2013 of the inner ring seat and the inner peripheral wall of the middle ring seat are formed as a common shared peripheral wall of the middle and inner rings, which can not only reduce the wall material of the burner head, reduce the production cost of the burner head, but also make the structure of the burner head simpler and more compact. .
  • the inner ring seat 201 is sheathed in the outer ring seat 203
  • the middle ring seat 202 is sheathed between the outer ring seat 203 and the inner ring seat 201 .
  • the outer ring distribution air passage 2031 and the middle ring distribution The airway 2021 and the inner ring distribution airway 2011 are also fitted in sequence from the outside to the inside.
  • the distance between the middle-ring distribution airway 2021 and the inner-ring distribution airway 2011 is smaller than the distance between the middle-ring distribution airway 2021 and the outer-ring distribution airway 2031 , and the middle-ring distribution airway 2021 and the inner-ring distribution airway 2011 are arranged adjacent to each other to minimize the
  • the inner ring distribution air passage 2011 located in the center part is close to it, so that the flame of the middle ring distribution air passage 2021 can be burned closer to the central area, and the thermal efficiency is higher.
  • the top surfaces of the bottom wall 2034 of the outer ring seat, the bottom wall 2022 of the middle ring seat and the bottom wall 2015 of the inner ring seat are all formed as inclined climbing surfaces along the airflow direction, which is beneficial to reduce the flow resistance of the primary mixed gas and make the air outlet more fluent.
  • the stability of the flame combustion is better.
  • the primary mixed gas is the mixed gas of fuel gas and primary air.
  • the outer ring ejector tube air outlet 2051 of the outer ring ejector tube 205 is fixed on the outer peripheral wall 2033 of the outer ring seat, and the middle and outer ring communicating air passages 206 and the outer ring ejector tube 205 are both straight tubular and extend along the same direction. Extending radially outward, in this way, the length of the passage connecting the air passage 206 between the middle and outer rings can be the shortest, and the flow resistance is smaller. And, as shown in FIG.
  • the air inlet 2061 of the communication channel of the communication channel 206 of the middle and outer rings is provided on the inner peripheral wall 2032 of the outer ring seat, and the air inlet 2061 of the communication channel is directly connected to the air outlet 2051 of the outer ring ejector tube and is connected to the channel
  • the area of the air inlet 2061 is smaller than the area of the air outlet 2051 of the outer ring ejection pipe, so that the flow resistance of the primary mixture can be made smaller, so that the primary mixture can be more smoothly guided to the middle ring distribution air passage 2021 to ensure the middle ring distribution of gas Channel 2021 has sufficient air supply.
  • the inner ring ejection tube 204 can be straight tubular, thereby reducing the flow resistance and flow pressure loss of the inner ring ejection tube 24, so that the burner 200 can burn less and stably during low-fire cooking. .
  • outer ring ejector tubes 205 and the inner ring ejector tubes 204 may extend radially and be spaced circumferentially. Due to the existence of the connecting air passages 206 between the middle and outer rings, if the inner and outer ejector tubes of the existing furnace head are parallel and side by side, the inner ring ejector tubes 24, the middle and outer rings communicate with the air passages 206 or the outer ring ejector tubes 25. Parts need to be set in a curved shape, which will increase the flow resistance of the primary mixture. To this end, as shown in FIGS.
  • the outer ring ejection tube 205 and the inner ring ejection tube 204 of this embodiment are fixed on the outer peripheral wall 2033 of the outer ring seat of the outer ring seat 203 at intervals along the circumferential direction, In this way, the arrangement of the connecting air passages 206 between the middle and outer rings can be more convenient, and both the outer ring ejection tube 205 and the inner ring ejection tube 204 can be arranged as straight tubes extending in the radial direction to reduce the flow resistance, thereby making the flame It is more stable, and it can be made a little smaller when cooking on a low heat. As shown in FIG. 1 to FIG.
  • the outer ring ejection tube 205 and the inner ring ejection tube 204 may be arranged at a right angle.
  • the present application is not limited to this, and the outer ring ejection tube 205 and the inner ring ejection tube 204 may be arranged at right angles. Arranged at acute or obtuse angles.
  • the tube length of the inner ring ejector tube 204 outside the outer peripheral wall 2033 of the outer ring seat may not be longer than 15 cm, which is beneficial to increase the secondary air ejection coefficient of the inner ring ejection tube 204, improve the air intake and The mixing speed and flow speed of gas and air reduce the inlet pressure loss under low-fire conditions, ensuring stable combustion under low-fire conditions.
  • the tube length of the inner ring ejector tube 204 located outside the outer peripheral wall 2033 of the outer ring seat may be longer than 10 cm, and further, the tube length of the inner ring ejection tube 204 positioned outside the outer peripheral wall 2033 of the outer ring seat may be longer than 6 cm and shorter. at 10cm.
  • the furnace head 200 can be additionally provided with channels capable of supplementing the secondary air.
  • a connecting top wall 207 may be provided between the top peripheral edge portion of the outer peripheral wall 2023 of the middle ring seat and the top peripheral edge portion of the inner peripheral wall 2032 of the outer ring seat, and the connecting top wall 207 may be provided with an axially through top wall vent (not shown in the figure).
  • the connecting top wall 207 may be provided with an axially through top wall vent (not shown in the figure).
  • secondary air can be supplemented to the central combustion area in the axial upward direction between the outer peripheral wall 2023 of the middle ring seat and the inner peripheral wall 2032 of the outer ring seat through the top wall vent, so that the combustion of the central combustion area is more sufficient and the thermal efficiency is higher, and Can reduce harmful gas emissions.
  • the inner peripheral wall 2012 of the inner ring seat may be formed with an axially penetrating central vent (not shown in the figure), so that secondary air can be supplemented to the central combustion area axially upward through the central vent.
  • Sufficient air supplement makes the combustion in the central combustion area more complete, the emission of carbon monoxide is lower, and the combustion efficiency is higher. Ring from the flame and other problems.
  • the burner head 200 is further provided with an ignition needle accommodating groove for installing the ignition needle, and the ignition needle accommodating groove can be arranged in the central vent.
  • the stove head 200 of the present application is reasonably compact in structure, small in volume, and takes up little space in the kitchen, which is favorable for promotion to users in small rooms.
  • the outer ring distribution air passage 2031 , the middle and outer ring communication air passage 206 and the middle ring distribution air passage 2021 of the burner head 200 are connected in sequence, and the outer The ring distribution airway 2031 is in communication with the outer ring cavity 1033, and the middle and outer ring communication airway 206 is in communication with the middle ring cavity 1025, that is, the outer ring distribution airway 2031, the middle and outer ring communication airway 206, the middle ring distribution airway 2021, the middle ring cavity 1025, the spoke cavity 1013 and the outer ring cavity 1033 are connected end to end in sequence, so that there are two upper and lower communication channels between the outer ring cavity 1033 and the middle ring cavity 1025, which greatly reduces the negative flow between the outer ring cavity 1033 and the middle ring cavity 1025. The pressure and the pressure difference between the two are smaller, so that the
  • the burner 1000 of the first embodiment may include a burner head 200 , a gas distribution plate 300 , a middle inner ring air distribution plate member 500 and a fire cover 100 .
  • the fire cover 100 of the burner 1000 of the first embodiment includes an outer ring cavity 1033 , a spoke cavity 1013 , a middle ring cavity 1025 and an inner ring cavity 1024 .
  • the outer fire cover 103 of the fire cover 100 is covered on the gas distribution plate 300 , and the outer ring cavity 1033 of the outer fire cover 103 communicates with a plurality of primary mixed gas through holes 302 .
  • the furnace head 200 is provided with an inner ring distribution air channel 2011, a middle ring distribution air channel 2021 and an outer ring distribution air channel 2031.
  • the inner ring distribution air channel 2011 is arranged in the inner ring seat 201 and communicates with the inner ring ejector tube 204.
  • the air channel 2021 is arranged in the middle ring seat 202 and communicates with the outer ring distribution air channel 2031 through the middle and outer ring communication air channel 206 .
  • the gas distribution plate 300 is disposed on the outer ring base 203 and covers the upper opening of the outer ring distribution air passage 2031 , and a plurality of primary mixture through holes 302 communicate with the outer ring distribution air passage 2031 .
  • the middle inner ring gas distribution plate member 500 is connected to the top of the inner ring seat 201 and the middle ring seat 202 and is connected to the lower part of the inner fire cover 102, that is, the inner fire cover 102 is connected to the furnace head 200 through the middle inner ring gas distribution plate member 500. on the inner ring seat 201 and the middle ring seat 202 .
  • the middle-inner-ring gas distribution plate member 500 is provided with a middle-ring primary mixed gas through hole and an inner-ring primary mixed gas through-hole, and the lower opening of the inner ring cavity 1024 passes through the inner ring of the middle-inner-ring gas distribution plate member 500.
  • the primary mixed gas through hole is communicated with the inner ring distribution air passage 2011 of the burner head 200 , and the lower opening of the middle ring cavity 1025 passes through the middle ring primary mixed gas passage hole of the middle inner ring gas distribution plate part 500 and the middle ring of the burner head 200
  • the distribution air passage 2021 Connected.
  • the circulation path of the primary mixed gas of the outer ring ejection pipe 205 the primary mixed gas of the outer ring ejection pipe 205 enters the outer ring from the gas outlet 2051 of the outer ring ejection pipe for distribution in the outer ring
  • the part of the primary mixed gas entering the outer ring distribution air channel 2031 flows into the channels on the left and right sides of the outer ring distribution air channel 2031 and upwards through the multiple primary mixed gas through holes 302 of the air distribution plate 300 evenly into the fire cover 100 in the outer ring cavity 1033.
  • Part of the primary mixed gas entering the outer ring cavity 1033 is discharged through the fire holes 104 of the outer fire cover 103 and burned, and another part of the primary mixed gas entering the outer ring cavity 1033 can enter the spoke cavity 1013 connecting the spokes 101 and the inner fire cover 102 in turn.
  • the middle ring cavity 1025 is discharged and burned through the fire holes 104 connecting the spokes 101 and the outer peripheral wall 1022 of the inner fire cover.
  • the other part of the primary mixed gas entering the outer ring distribution air passage 2031 flows to the middle ring distribution air passage 2021 through the middle and outer ring communication air passages 206 and upwards into the middle ring cavity 1025 of the inner fire cover 102, and part of the primary mixed gas entering the middle ring cavity 1025 passes through the inner ring cavity 1025.
  • the fire hole 104 on the outer peripheral wall 1022 of the fire cover is discharged and burned, and another part of the primary mixed gas entering the middle ring cavity 1025 can enter the spoke cavity 1013 connecting the spokes 101 and the outer ring cavity 1033 of the outer fire cover 103 in turn and pass through the connecting spokes 101 And the fire holes 104 on the outer fire cover 103 are discharged and burned.
  • the circulation path of the primary mixed gas of the inner ring ejector pipe 204 the primary mixed gas of the inner ring ejection pipe 204 flows to the inner ring distribution air passage 2011 and upwards into the inner ring cavity 1024 of the inner fire cover 102, and enters the inner ring cavity 1024.
  • the primary mixed gas is discharged and burned through the fire holes 104 on the inner peripheral wall 1021 of the inner fire cover.
  • the burner 1000 of the second embodiment is the burner 1000 of the second embodiment.
  • the burner 1000 of the second embodiment is based on the burner 1000 of the first embodiment with only an air passage cover 208 added.
  • the channel cover 208 is detachably disposed above the middle ring seat 202 and covers the upper opening of the middle ring distribution air channel 2021 .
  • the upper opening of the distribution air passage 2021 in the middle ring is covered by the air passage cover 208, so that the burner head 200 with three distribution air passages can be used as a burner head with two distribution air passages, thereby making the burner head 200
  • the versatility and performance scalability are better.
  • the fire cover 100 can be used on a burner head 200 provided with three distribution air passages: an outer ring distribution air passage 2031, a middle ring distribution air passage 2021 and an inner ring distribution air passage 2011. to form a three-ring flame.
  • the burner 200 includes an inner ring ejection tube 204, an outer ring ejection tube 205, an inner ring seat 201, a middle ring seat 202, an outer ring seat 203 and an airway cover 208, an inner ring seat 201, a middle ring seat 202 and an outer ring
  • the seats 203 are assembled sequentially from the inside to the outside.
  • the inner ring distribution airway 2011 is arranged in the inner ring seat 201 and communicated with the inner ring ejection tube 204;
  • the outer ring distribution airway 2031 is arranged in the outer ring seat 203 and communicated with the outer ring ejection tube 205, and the middle ring distribution airway
  • the 2021 is arranged in the middle ring seat 202 and communicates with the outer ring distribution air channel 2031 through the middle and outer ring communication air channels 206 ;
  • the air channel cover 208 is arranged above the inner ring seat 201 and the middle ring seat 202 .
  • the burner 1000 of the second embodiment may include a burner head 200 , a gas distribution plate 300 and a fire cover 100 .
  • the fire cover 100 of the burner 1000 of the second embodiment includes an outer ring cavity 1033 , a spoke cavity 1013 , a middle ring cavity 1025 and an inner ring cavity 1024 , and the outer ring cavity 1033 , the spoke cavity 1013 and the middle ring cavity 1025 are connected in sequence.
  • the outer fire cover 103 of the fire cover 100 is covered on the gas distribution plate 300 , and the outer ring cavity 1033 of the outer fire cover 103 communicates with a plurality of primary mixed gas through holes 302 .
  • the furnace head 200 is provided with an inner ring distribution air channel 2011, a middle ring distribution air channel 2021 and an outer ring distribution air channel 2031.
  • the inner ring distribution air channel 2011 is arranged in the inner ring seat 201 and communicates with the inner ring ejector tube 204.
  • the air channel 2021 is arranged in the middle ring seat 202 and communicates with the outer ring distribution air channel 2031 through the middle and outer ring communication air channel 206.
  • the outer ring distribution air channel 2031 is arranged in the outer ring seat 203 and communicates with the outer ring ejection tube 205.
  • the airway cover 208 is disposed on the middle ring seat 202 and covers the upper opening of the middle ring distribution airway 2021 .
  • the gas distribution plate 300 is disposed on the outer ring base 203 and covers the upper opening of the outer ring distribution air passage 2031 , and a plurality of primary mixture through holes 302 communicate with the outer ring distribution air passage 2031 .
  • the inner fire cover 102 is connected to the inner ring seat 201 and the middle ring seat 202 of the burner head 200 , and the lower opening of the inner ring cavity 1024 communicates with the inner ring distribution air passage 2011 of the burner head 200 .
  • the inner fire cover 102 since the middle ring cavity 1025 of the inner fire cover 102 is not communicated with the distribution air passage of the burner head 200, as shown in FIG. 15, the inner fire cover 102 also includes a cover middle ring
  • the bottom wall 1026 of the inner fire cover is open at the lower part of the cavity 1025, so that the primary mixed gas in the middle ring cavity 1025 can be prevented from leaking from the lower opening of the middle ring cavity 1025.
  • the gas nozzle of the inner ring is made as small as possible, and the gas supply volume is small.
  • the inner fire cover bottom wall 1026 of the inner fire cover 102 is also sealed.
  • the annular lower part of the inner ring cavity 1024 of the cover is open, and the bottom wall 1026 of the inner fire cover is also provided with an inner ring air passage air inlet 10261 which communicates with the inner ring cavity 1024 and has a relatively reduced air intake cross-sectional area.
  • the airway cover body 208 also extends inward to be disposed on the inner ring seat 201 and cover the upper opening of the inner ring distribution airway 2011.
  • the airway cover body 208 is provided with an axially penetrating inner ring airway outlet.
  • the air port 2081, the inner ring distribution air passage 2011 communicates with the inner ring cavity 1024 through the inner ring air passage air outlet 2081. That is, while the inner fire cover 102 is connected to the inner ring seat 201 and the middle ring seat 202 of the burner 200 , the air outlet 2081 of the inner ring air passage communicates with the air inlet 10261 of the inner ring air passage to supply air to the inner ring cavity 1024 . 18 and FIG.
  • the airway cover 208 is in the shape of a disc and is fitted on the middle ring seat 202 and the inner ring seat 201 to cover the inner ring distribution air channel 2011 and the middle ring distribution air channel 2021 , the inner ring air passage air outlet 2081 is paired with two symmetrically arranged on the air passage cover body 208 and communicated with the inner ring distribution air passage 2011 .
  • the airway cover 208 can also be in an oval shape, for example, the inner ring airway outlet 2081 can also be three, four or five, etc., and the multiple inner ring airway outlet 2081 can be uniform along the circumferential direction They are arranged on the airway cover body 208 at intervals and communicate with the inner ring distribution airway 2011 , but the present application is not limited thereto.
  • the center of the airway cover 208 may be formed with a hole for passing through the thermocouple and a hole for passing through the ignition needle.
  • the mouth edge of the air outlet 2081 of the inner ring airway can protrude upward from the airway cover 208 to form a plug-in protrusion 2082 .
  • the mouth rim portion can protrude downward from the bottom wall 1026 of the inner fire cover to form a plugging groove portion surrounding the air inlet 10261 of the inner ring air passage, so that the plugging protrusion 2082 of the air passage cover body 208 can be plugged through
  • a limit installation structure is formed to enhance the connection reliability of the fire cover 100 and the burner head 200; Inner ring gas distribution plate component 500.
  • the flow path of the primary mixed gas of the outer ring ejection pipe 205 the primary mixed gas of the outer ring ejection pipe 205 enters the outer ring from the gas outlet 2051 of the outer ring ejection pipe for distribution in the outer ring
  • the primary mixed gas entering the outer ring distribution air channel 2031 flows into the channels on the left and right sides of the outer ring distribution air channel 2031 and upwards evenly into the fire cover 100 through the multiple primary mixed gas through holes 302 of the air distribution plate 300 in the outer ring cavity 1033.
  • Part of the primary mixed gas entering the outer ring cavity 1033 is discharged through the fire holes 104 of the outer fire cover 103 and burned, and another part of the primary mixed gas entering the outer ring cavity 1033 can enter the spoke cavity 1013 connecting the spokes 101 and the inner fire cover 102 in turn.
  • the middle ring cavity 1025 is discharged and burned through the fire holes 104 connecting the spokes 101 and the outer peripheral wall 1022 of the inner fire cover.
  • the circulation path of the primary mixed gas of the inner ring ejector pipe 204 the primary mixed gas of the inner ring ejection pipe 204 flows to the inner ring distribution air passage 2011 and upwards into the inner ring cavity 1024 of the inner fire cover 102, and enters the inner ring cavity 1024.
  • the primary mixed gas is discharged and burned through the fire holes 104 on the inner peripheral wall 1021 of the inner fire cover.
  • the difference between the burner 1000 of the second embodiment and the burner 1000 of the first embodiment is only in that
  • the air passage cover 208 is added to seal the upper opening of the middle ring distribution air passage 2021, that is, the manufacturer can use the burner 200 with three distribution air passages in different models of products, and the three distribution air passages are added.
  • the versatility and performance scalability of the gas duct burner 200 is only in that
  • the burner 200 with the three distribution air passages provided with the air passage cover 208 can be appropriately enlarged to provide a burner with a higher heat load;
  • the burner head 200 of the three distribution air channels of the channel cover body 208 can cover the upper opening of the middle ring distribution air channel 2021 to provide another type of burner with moderate heat load.
  • the outer ring can be appropriately reduced.
  • Gas nozzle for ejector tube 205
  • a sealing structure may be provided between the airway cover 208 and the inner ring seat 201 and/or between the airway cover 208 and the outer ring seat 203, so as to prevent the primary mixed gas from passing from the airway cover 208 to the outer ring seat 203.
  • the gap between the burners 200 leaks out. That is, a sealing structure may be provided between the airway cover 208 and the inner ring seat 201; alternatively, a sealing structure may be provided between the airway cover 208 and the outer ring seat 203; or, the airway cover 208 and the inner ring seat A sealing structure may be provided between 201 and a sealing structure may be provided between the airway cover 208 and the outer ring seat 203 .
  • the sealing structure can be various, for example, a plug-in groove sealing structure, a screw-on sealing structure, etc., and the present application is not limited thereto.
  • the inner ring seat 201 may include an inner ring seat inner peripheral wall 2012 and an inner ring seat outer peripheral wall 2013 that define the inner ring distribution air passage 2011
  • the sealing structure is a plug groove sealing structure and includes a first annular plug groove.
  • 2083 and the first annular inserting wall 2084 inserted in the first annular inserting groove 2083 one of the first annular inserting groove 2083 and the first annular inserting wall 2084 forms an inner ring seat
  • the other one of the first annular insertion groove 2083 and the first annular insertion wall 2084 is formed on the bottom surface of the airway cover 208 .
  • an insertion groove sealing structure is formed between the airway cover 208 and the inner ring seat 201 , and the bottom surface of the airway cover 208 extends downward to form two first annular insertion walls 2084 .
  • the outer top end of the inner peripheral wall 2012 of the seat and the inner top end of the outer peripheral wall 2013 of the inner ring seat are recessed downward to form first annular insertion grooves 2083 respectively.
  • the two first annular insertion walls 2084 of the airway cover 208 correspond to The two first annular insertion grooves 2083 are connected to each other, thereby preventing the primary mixed gas from leaking out from the gap between the airway cover 208 and the inner ring seat 201 .
  • the middle ring seat 202 may include an inner peripheral wall of the middle ring seat and an outer peripheral wall 2023 of the middle ring seat that define the middle ring distribution air passage 2021, and the sealing structure is a plug groove sealing structure and includes a second annular plug groove 2085 and a plug-in groove.
  • the second annular inserting wall 2086 in the second annular inserting groove 2085, one of the second annular inserting groove 2085 and the second annular inserting wall 2086 is formed on the outer peripheral wall 2023 of the middle ring seat.
  • the other of the two annular insertion grooves 2085 and the second annular insertion wall 2086 is formed on the outer peripheral portion of the airway cover 208 .
  • the sealing structure is reasonable and simple, easy to manufacture, and beneficial to reduce the manufacturing cost.
  • the outer peripheral portion of the airway cover 208 can extend outward to form a second annular insertion wall 2086 , and the inner top end of the outer peripheral wall 2023 of the middle ring seat is recessed downward to form a second annular insertion wall respectively.
  • the second annular inserting wall 2086 of the airway cover 208 is correspondingly connected to the second annular inserting wall 2086 of the outer peripheral wall 2023 of the middle ring seat, so as to prevent the primary mixed gas from passing from the airway cover 208
  • the gap with the middle ring seat 202 leaks out.
  • the burner 1000 of the third embodiment is the burner 1000 of the third embodiment.
  • the fire cover 100 in the burner 1000 of the third embodiment has the same structure as the fire cover 100 in the burner 1000 of the second embodiment, On the basis of the fire cover 100 in the burner 1000 of the first embodiment, an inner fire cover bottom wall 1026 provided with an inner ring air passage air inlet 10261 is added, and the inner fire cover bottom wall 1026 covers the middle ring cavity 1025. Lower opening. In this way, the fire cover 100 can be used with the burner 200 provided with only the outer ring distribution air channel 2031 and the inner ring distribution air channel 2011 to form a three-ring flame.
  • the burner 200 includes an inner ring ejection tube 204 , an outer ring ejection tube 205 , an inner ring seat 201 and an outer ring seat 203 .
  • the inner ring seat 201 is provided with an inner ring distribution air channel 2011, the inner ring distribution air channel 2011 is communicated with the inner ring ejection tube 204, the outer ring seat 203 is sleeved outside the inner ring seat 201 and an outer ring distribution air channel 2031 is arranged inside,
  • the outer ring distribution airway 2031 communicates with the outer ring ejector tube 205 .
  • the burner 1000 of the third embodiment may include a burner head 200 , a gas distribution plate 300 and a fire cover 100 arranged from bottom to top.
  • the fire cover 100 of the burner 1000 of the third embodiment includes an outer ring cavity 1033 , a spoke cavity 1013 , a middle ring cavity 1025 and an inner ring cavity 1024 , and the outer ring cavity 1033 , the spoke cavity 1013 and the middle ring cavity 1025 are connected in sequence.
  • the outer fire cover 103 of the fire cover 100 is covered on the gas distribution plate 300 , and the outer ring cavity 1033 of the outer fire cover 103 communicates with a plurality of primary mixed gas through holes 302 .
  • the furnace head 200 is only provided with an inner ring distribution air passage 2011 and an outer ring distribution air passage 2031.
  • the inner ring distribution air passage 2011 is provided in the inner ring seat 201 and communicates with the inner ring ejection tube 204.
  • the outer ring distribution air passage 2031 is provided with It is in the outer ring seat 203 and communicates with the outer ring ejection tube 205 .
  • the gas distribution plate 300 is disposed on the outer ring base 203 and covers the upper opening of the outer ring distribution air passage 2031 , and a plurality of primary mixture through holes 302 communicate with the outer ring distribution air passage 2031 .
  • the inner fire cover 102 of the fire cover 100 is connected to the inner ring seat 201 of the burner head 200 and the lower opening of the inner ring cavity 1024 communicates with the inner ring distribution air passage 2011 of the burner head 200 .
  • the inner fire cover 102 also includes a cover
  • the bottom wall 1026 of the inner fire cover is open at the lower part of the middle ring cavity 1025 , so that the primary mixed gas in the middle ring cavity 1025 can be prevented from leaking from the lower opening of the middle ring cavity 1025 .
  • the gas nozzle of the inner ejection pipe 204 can be made as small as possible to reduce the gas supply volume.
  • the inner fire cover bottom wall 1026 of the inner fire cover 102 also covers the inner ring
  • the annular lower part of the cavity 1024 is open, and the bottom wall 1026 of the inner fire cover is also provided with an inner ring air duct air inlet 10261 which communicates with the inner ring cavity 1024 and has a relatively reduced air intake cross-sectional area.
  • the furnace The inner ring seat 201 of the head 200 can be provided with an inner ring distribution air channel cover plate, the inner ring distribution air channel cover plate is provided with a through air channel outlet, and the inner fire cover 102 is connected to the inner ring of the burner head 200. While on the seat 201 , the air outlet of the air passage communicates with the air inlet 10261 of the inner ring air passage to supply air to the inner ring cavity 1024 .
  • the mouth rim of the air outlet of the air passage can protrude upward from the inner ring distribution air passage cover plate to form a cover inserting protrusion, and the mouth rim of the inner ring air passage air inlet 10261 It can protrude downward from the bottom wall 1026 of the inner fire cover to form a plugging groove around the air inlet 10261 of the inner ring airway, so that the plugging protrusion of the distribution airway cover plate of the inner ring can be inserted into the inner ring through the plugging.
  • the slot portion of the bottom wall 1026 of the fire cover is inserted into the groove portion to form a limit installation structure, which enhances the connection reliability of the fire cover 100 and the burner head 200; Air distributor parts.
  • the interface portion of the outer ring ejection tube 205 is located at the bottom of the outer ring seat 203 and the outer ring ejection tube 205 is connected to the outer ring distribution airway 2031 along the tangential direction, and the inner ring ejection tube 204
  • the interface part is located at the bottom of the inner ring seat 201 and the inner ring ejection tube 204 is connected to the inner ring distribution airway 2011 along the tangential direction, and the outer ring ejection tube 205 and the inner ring ejection tube 204 are arranged in parallel and spaced apart.
  • the bottom wall 2034 of the outer ring seat 203 of the outer ring seat 203 and the top surface of the bottom wall 2015 of the inner ring seat of the inner ring seat 201 are both formed as inclined climbing surfaces along the air flow direction, which is beneficial to reduce the flow resistance of the primary mixed gas, and the air outlet is more Smoother and more stable flame combustion.
  • the circulation path of the primary mixed gas in the outer ring ejector pipe 205 is: the primary mixed gas in the outer ring ejection pipe 205 enters the outer ring from the outlet 2051 of the outer ring ejection In the ring distribution air channel 2031 , the primary mixed gas entering the outer ring distribution air channel 2031 uniformly enters the outer ring cavity 1033 of the fire cover 100 through a plurality of primary mixed gas through holes 302 of the air distribution plate 300 .
  • Part of the primary mixed gas entering the outer ring cavity 1033 is discharged through the fire holes 104 of the outer fire cover 103 and burned, and another part of the primary mixed gas entering the outer ring cavity 1033 can enter the spoke cavity 1013 connecting the spokes 101 and the inner fire cover 102 in turn.
  • the middle ring cavity 1025 is discharged and burned through the fire holes 104 connecting the spokes 101 and the outer peripheral wall 1022 of the inner fire cover.
  • the circulation path of the primary mixed gas of the inner ring ejector tube 204 the primary mixed gas in the inner ring ejection tube 204 enters the inner ring distribution airway 2011 from the air outlet of the inner ring ejection tube, and enters the inner ring distribution airway 2011 once
  • the mixed gas flows to the inner ring cavity 1024 of the inner fire cover 102 through the air channel outlet of the inner ring distribution air channel cover plate and the inner ring air channel air inlet 10261 of the bottom wall 1026 of the inner fire cover in turn, and enters the inner ring cavity 1024 once.
  • the mixed gas is discharged and burned through the fire holes 104 on the inner peripheral wall 1021 of the inner fire cover.
  • the fire cover 100 of the burner 1000 of the present application can be adapted to be used with a variety of different burners, that is, the burner 200 of the burner 1000 of the present application is not only the burner of the above three embodiments,
  • the three ejector tubes may also correspond to the burners that supply gas to the three distribution air passages, and the present application is not limited thereto.
  • the inventors of the present application have found through continuous research and experimentation that it is difficult for the existing air distributor to meet the requirements of high heat load and high combustion efficiency of the burner. This is because after the heat load of the gas stove is increased, due to insufficient secondary air supplement, the combustion condition will deteriorate, resulting in a decrease in thermal efficiency and substandard flue gas emissions. There are two main reasons for insufficient secondary air supplementation. One is that the total amount of secondary air supplementation is insufficient, resulting in an abnormal ratio of the total amount of air to the total amount of gas, and the deterioration of the combustion condition due to lack of oxygen results in a decrease in thermal efficiency and flue gas.
  • the emission does not meet the standard; the other is due to the uneven or insufficient mixing of the secondary air and the gas, resulting in an abnormal mixing ratio of the air and the gas, which will also cause the deterioration of the combustion condition, resulting in a decrease in thermal efficiency and substandard flue gas emissions.
  • the hole circulation area of the secondary air holes is relatively large, and the secondary air enters the combustion area through the secondary air holes and then returns to the holes.
  • the two sides of the air diffuser and form a large vortex area which will increase the intake resistance of the secondary air and affect the intake air volume; and, after the intake air, will lead to uneven distribution of the primary mixed gas and the secondary air. And affect the mixing ratio, which will lead to the deterioration of combustion conditions, resulting in a decrease in thermal efficiency and substandard flue gas emissions.
  • the inventor of the present application provides a new type of air distribution plate 300
  • the air distribution plate 300 is annular and includes an annular disk peripheral wall 301, a plurality of primary mixed gas through holes 302 and a plurality of secondary air Holes 303, a plurality of primary air mixture through holes 302 are arranged at intervals in the circumferential direction and are formed on the peripheral wall 301 of the annular disk in the axial direction, and a plurality of secondary air holes 303 are arranged at intervals in the circumferential direction and formed through the radial direction On the peripheral wall 301 of the annular disk, the number of secondary air holes 303 is greater than or equal to ten.
  • the number of secondary air holes 303 is large, correspondingly, the hole flow area of a single secondary air hole 303 is reduced, the eddy current effect formed by the secondary air is also small, the air intake streamline is relatively uniform, the air intake resistance is reduced, and the flow rate is reduced. If the resistance is small, the intake air volume will be more, which is beneficial to improve the thermal efficiency and thermal load of the burner.
  • the gas distribution plate 300 may be in the shape of a circular ring, a rectangular ring, or other ring shapes, and may be matched with the burner head 200 and the fire cover 100 of the burner 1000 .
  • the number of the secondary air holes 303 is greater than or equal to 10, for example, 10, 12, 15 or more.
  • the shapes of the secondary air holes 303 and the primary air mixture through holes 302 can also be various, such as round holes, racetrack holes, or other shaped holes, and the present application is not limited thereto.
  • the number of secondary air holes 303 is greater than or equal to 16. As shown in FIG. 6 and FIG. 7 , the air distribution plate 300 is annular, and the number of secondary air holes 303 is 20. The larger the number of secondary air holes 303, the smaller the flow area of a single secondary air hole 303, the more uniform the distribution of the secondary air, the smaller the vortex effect formed by the secondary air, and the smaller the flow line of the intake air. More uniform, with less intake and flow resistance.
  • the area of the cross section of the secondary air hole 303 perpendicular to its own axis is less than or equal to 120 mm 2 , the distribution of the secondary air will be relatively uniform, the vortex effect formed will be small, and the air intake streamline will be relatively uniform.
  • the intake resistance and flow resistance are small, and the intake air volume is increased, which is beneficial to improve the combustion efficiency; and, the area of the cross-section of the secondary air hole 303 perpendicular to its own axis can be set to be greater than or equal to 50mm 2 , so that it can be ensured that The secondary air hole 303 has sufficient intake air volume and smoothness of intake air.
  • the secondary air hole 303 can be a circular hole, that is, the cross-sectional shape of the secondary air hole 303 perpendicular to its own axial direction can be circular. 300 is easier to process and reduces the difficulty of processing.
  • the secondary air hole 303 can be a waist-shaped hole (not shown in the figure), and the parallel waist edges of the waist-shaped hole are arranged along the axial direction of the air distribution plate 300 , that is, the cross section of the secondary air hole 303 is perpendicular to its own axial direction
  • the shape can be waist-shaped.
  • the outer side of the annular disk peripheral wall 301 extends upward to form a top annular peripheral wall 3011 , and the top annular peripheral wall 3011 is used for fixed installation with the outer fire cover 100 .
  • the top edge of the top annular peripheral wall 3011 is formed with an annular platform portion for limited installation with the fire cover 100 .
  • the number of the primary air mixture through holes 302 may be greater than or equal to 10, and the secondary air holes 303 and the primary air mixture through holes 30 are alternately distributed along the circumferential direction.
  • the number of primary air mixture through holes 302 is large, correspondingly, the hole flow area of a single primary air mixture through hole 302 is reduced, the eddy current effect formed by the primary air mixture through hole 302 is also small, the air intake streamline is relatively uniform, and the intake air flow line is relatively uniform. The air resistance is reduced, the flow resistance is small, and the intake air volume will be more, which is beneficial to increase the heat load of the burner.
  • the secondary air holes 303 and the primary mixed gas through holes 30 are alternately distributed in the circumferential direction, the distribution of the secondary air and the primary mixed gas will be more uniform, and the combustion efficiency will be better.
  • the number of primary mixed gas through holes 302 is greater than or equal to 10, and may be, for example, 10, 12, 15 or more, etc.
  • the number of the primary air mixture through holes 302 and the secondary air holes 303 are both 20 and alternately distributed in sequence.
  • the greater the number of primary mixed gas through holes 302 the smaller the flow area of a single primary mixed gas through hole 302, the more uniform the distribution of primary mixed gas, the smaller the vortex effect, and the more streamlined the intake air. Uniform, less intake resistance and flow resistance.
  • the area of the cross section of the primary mixed gas through hole 302 perpendicular to its own axis is less than or equal to 120 mm 2 , the distribution of the primary mixed gas will be relatively uniform, the vortex effect formed will be small, and the intake streamline will be relatively uniform. , the air intake resistance and flow resistance are small, and the intake air volume increases, which is beneficial to improve thermal efficiency and thermal load; and, the area of the cross section of the primary air mixture through hole 302 perpendicular to its own axis is set to be greater than or equal to 60mm 2 , so , which can ensure sufficient intake air volume and smoothness of intake air through the primary air mixture through holes 302 .
  • the width of the outer end 3021 of the primary mixture through hole 302 is larger than the hole width of the primary mixture through hole 302 toward the inner end 3022 .
  • the primary air mixture through hole 302 is in the shape of a waist-shaped hole with one large end and a small one.
  • the shape of the primary mixed gas through hole 302 matches the shape of the annular wall of the annular disk peripheral wall 301, which can increase the total intake area of the plurality of primary mixed gas through holes 302 as much as possible, increase the total intake of the primary mixed gas, and further Heat load can be increased.
  • a position relatively close to the center of the air distribution plate 300 is defined as “inner”, and a position relatively far from the center of the air distribution plate 300 is defined as “outer”.
  • the primary mixed gas is the mixed gas of fuel gas and primary air.
  • a plurality of secondary air holes 303 may be uniformly grouped in the circumferential direction to form a plurality of secondary air holes 303 arranged at intervals in the circumferential direction and including at least two secondary air holes 303
  • the secondary air hole group, the secondary air hole group and the primary mixed gas through holes 302 are alternately distributed in the circumferential direction.
  • the plurality of secondary air holes 303 can be evenly divided into 2 groups, 3 groups, 4 groups, 5 groups or more groups; the uniform grouping can be an equal number of groups or an approximate number of groups, that is, each secondary air hole group
  • the numbers of the secondary air holes 303 in the multiple secondary air hole groups may be the same, or the numbers of the secondary air holes 303 in the multiple secondary air hole groups may be similar, for example, they differ by one or two.
  • the number of secondary air holes 303 in each secondary air hole group may be 2, 3, 4, 5 or more. As shown in FIGS.
  • the air distribution plate 300 is provided with 16 secondary air holes 303 , and the 16 secondary air holes 303 are evenly grouped in the circumferential direction to form a circumferentially spaced arrangement and include 4 secondary air holes Group of 4 secondary air holes of 303.
  • the number of primary mixed gas through holes of the gas distributor plate 300 of the present embodiment is reduced, which is more convenient for the processing of the gas distributor plate 300 .
  • the balance between the optimal performance of the air distribution plate 300 and the production cost is well taken into account.
  • the burner 1000 of the present application further includes a pot support 400 sleeved outside the fire cover 100 and the gas distributor 300 .
  • the pot support 400 includes a ring-shaped energy collecting disc 401 , a support part and a plurality of heat recovery fins 403 .
  • the bracket part is arranged on the energy gathering plate and is used to support the pot.
  • the annular energy gathering plate 401 can isolate the high temperature flame from the external environment, reduce the influence of the external low temperature airflow on the flame and the loss of combustion heat, and at the same time make The hot gas stays on the heat exchange surface at the bottom of the cooker for a longer time, improving the heat exchange efficiency, thereby improving the overall thermal efficiency of the burner. Since the air intake channel of the combustion area is formed between the pot support 400 and the panel, a plurality of heat recovery fins 403 are arranged on the bottom surface of the energy collecting disk 401 and are arranged at intervals along the circumferential direction.
  • a secondary air regenerative channel 406 is formed between the secondary air, and the secondary air can be heated by the regenerative fins when passing through the secondary air regenerative channel 406, so as to realize the preheating of the secondary air, and then bring the heat on the regenerative fins. back into the combustion zone to improve system thermal efficiency.
  • the energy collecting disc 401 is in the shape of an annular cover body with a circular central combustion hole in the center; the energy collecting disc 401 can also be in the shape of a rectangular annular cover body or other shape, the central combustion through hole can also be a square hole or other irregular shape hole; the shapes of the plurality of regenerative fins 403 can also be various, and the number can also be set according to actual application needs; the energy collecting disc 401 can be a single Layer, two-layer, three-layer or more thermal insulation structure, the present application is not limited thereto.
  • the heat recovery fins 403 may be in the shape of a flat sheet or a curved sheet. As shown in FIG. 27 , the plurality of heat recovery fins 403 can be in the shape of plane sheets and all extend radially. In this way, the flow resistance of the secondary air is small, and the secondary air can be quickly and smoothly entered through the heat recovery channel 406 of the secondary air. burning area.
  • the plurality of heat recovery fins 403 can be in the shape of a plane sheet and are arranged obliquely to the radial direction, and the plurality of heat recovery fins 403 arranged obliquely can be arranged in a vortex shape; or, the plurality of heat recovery fins 403 can all be curved
  • the fins 403 are arranged in a swirl shape, and the arrangement of the plurality of regenerative fins 403 in a swirl shape can not only increase the intake path of the secondary air, increase the heat exchange area between the regenerative fins 403 and the secondary air, and improve the heat exchange efficiency. It can also make the entrained secondary air form a swirling vortex flow, and the swirling vortex flow can effectively mix the gas and the secondary air, so that the gas can be fully burned, and the combustion rate is greatly improved.
  • the support part includes a plurality of support feet 402 , and the plurality of support feet 402 are arranged on the top surface of the energy collecting disk 401 and are arranged at intervals in the circumferential direction.
  • the top edge of the support feet 402 can be parallel to the horizontal plane, so that the contact area with the bottom surface of the cookware can be increased, and the movement and slip between the support feet 402 and the cookware can be prevented, so that the cookware can be more stably supported on the support feet 402, Safer and more reliable.
  • the support portion can also be, for example, a cylindrical frame or a support of other shapes connected to the energy collecting disc; the top surface of the energy collecting disc 401 is spaced apart along the circumferential direction.
  • the support feet 402 are flat, the number of the support feet 402 can also be three, five or more, and the shape of the support feet 402 can also be various, such as V-shaped Plates, I-shaped plates or other irregular shapes, etc.
  • intermediate reinforcing fins 404 can be connected between any two adjacent heat recovery fins 403, so that the heat exchange area between the fins and the secondary air can be increased, and the heat exchange efficiency can be further improved.
  • the turbulence effect on the secondary air is added to each secondary air heat recovery channel 406, so that the secondary air can more fully exchange heat with the fins.
  • the shape and arrangement of the middle reinforcing fins 404 can be various, for example, the middle reinforcing fins 404 can be S-shaped fins or other shaped fins, etc., and any adjacent two heat recovery fins 403 can be placed between them.
  • One middle reinforcing fin 404 is connected, and two, three or more middle reinforcing fins 404 may also be connected, and so on.
  • the intermediate reinforcing fins 404 may be T-shaped and include wing pieces 4041 and web pieces 4042 .
  • the wing pieces 4041 are arranged in a horizontal direction and the two ends are respectively connected with the adjacent heat recovery fins 403, and the web pieces 4042 are arranged along a vertical plane and extend downward.
  • the middle reinforcing fins 404 can divide the secondary air heat recovery channel 406 into smaller channels, so as to further improve the turbulence effect on the secondary air.
  • the vertical length of the web sheet 4042 is shorter than the vertical length of the heat recovery fin 403, and the height of the bottom edge of the web sheet 4042 can be higher than the bottom edge height of the heat recovery fin 403, which can avoid secondary air
  • the channel divided by the middle reinforcing fins 404 for the heat recovery channel 406 is too small to affect the intake of secondary air.
  • the energy collecting plate 401 is also heated and radiates heat outward, thereby causing heat dissipation.
  • the energy collecting plate 401 is also heated and radiates heat outward, thereby causing heat dissipation.
  • the heat generated by the combustion of the burner to be used for heating the cookware as much as possible and avoid the heat from dissipating from the energy collecting disc 401 to the outside, in some embodiments, as shown in FIG.
  • the first energy concentrating disc 4011 and the second energy concentrating disc 4012, the bottom surface of the first energy concentrating disc 4011 and the disc top surface of the second energy concentrating disc 4012 together define a thermal insulation cavity 407, and a plurality of support feet 402 are arranged on the first On the top surface of the first energy collecting disk 4011 , a plurality of heat recovery fins 403 are arranged on the bottom surface of the second energy collecting disk 4012 .
  • the heat dissipation cavity 407 between the first energy collecting disc 4011 and the second energy collecting disc 4012 can reduce the heat dissipation of the combustion area from the energy collecting disc 401 to the outside, further improving the overall thermal efficiency of the burner, and More energy saving and environmental protection.
  • an annular lower groove 40111 is formed on the annular wall of the first energy concentrating disk 4011.
  • the first energy concentrating disk 4011 includes an inner ring edge of the first energy concentrating The outer ring edge of the energy collecting disk and the annular disk wall connected between the inner ring edge of the first energy collecting disk and the outer ring edge of the first energy collecting disk, the annular disk wall is formed with a concave annular lower groove 40111, The groove bottom of the annular lower groove 40111 is lower than the inner ring edge of the first energy collecting disc and the outer ring edge of the first energy collecting disc respectively.
  • the concave shape of the annular lower groove 40111 can be adapted to the outline shape of the outer flame of the flame, so that a proper gap can be left between the flame and the annular lower groove 40111 to ensure that the flame has enough combustion space to avoid Excessive emission of undesirable substances due to burning of the pan wall.
  • the annular lower groove 40111 can also be used to accommodate the liquid overflowing from the pot, so as to prevent the liquid from flowing to the fire hole and blocking the fire hole.
  • the annular disk wall of the first energy collecting disk 4011 may include a plurality of lobe-shaped curved surfaces that are adjacent to each other in the circumferential direction and have the same rotation direction, so that the lobed-shaped curved surface can make the secondary air drawn in A local air pressure difference is formed. Due to the existence of the air pressure difference, the secondary air flows from the high pressure area to the low pressure area, forming a small gas circulation, thereby forming a swirling vortex of the secondary air. The swirling vortex effectively mixes the gas and the secondary air, so the gas can be fully burned, which greatly improves the combustion rate.
  • the second energy concentrating disk 4012 includes an inner ring edge of the second energy concentrating disk, an outer ring edge of the second energy concentrating disk, and is connected to the inner ring edge of the second energy concentrating disk and the second energy concentrating disk.
  • the annular disk wall between the outer ring edges of the second energy concentrating disk, the inner ring edge of the second energy concentrating disk and the outer ring edge of the second energy concentrating disk both extend upward, and the annular disk wall of the second energy concentrating disk 4012 is concave downward A groove under the second energy collecting disc is formed.
  • the inner ring of the first energy gathering disc extends inward to form an inner ring flanging
  • the outer ring of the first energy gathering disc extends outward to form an outer ring flanging.
  • the inner ring edge of the second energy collecting disc and the outer ring edge of the second energy collecting disc form a fixed connection.
  • the annular disk wall of the second energy concentrating disk 4012 may include an annular disk bottom wall and an annular disk side wall that are smoothly connected in transition.
  • the size of the groove under the disc further makes the volume of the heat insulating cavity 407 larger, and the heat insulating effect is better.
  • the heat insulating cavity 407 may be a vacuum cavity or an air cavity.
  • a plurality of supporting feet 405 protrude downward from the bottom surface of the second energy collecting disk 4012, and the plurality of supporting feet 405 are arranged at intervals along the circumferential direction.
  • the vertical length of the support feet 405 is larger than the vertical length of the heat recovery fins 403
  • the bottom edge height of the heat recovery fins 403 is higher than the bottom edge height of the support feet 405 .
  • the heat recovery fins 403 are in contact with the lower support member, so as to avoid excessive heat dissipation due to the heat of the heat recovery fins 403 being transferred to the lower support member.
  • the plurality of supporting feet 405 may be independently provided supporting feet, or may be formed by extending downward from part of the heat recovery fins 403 , and the present application is not limited thereto.
  • a coating material with high temperature resistance, low transmittance, high absorptivity or high emissivity may be provided on the first energy collecting disc 4011, for example, the emissivity of the coating material may be greater than 0.5, preferably 0.7-1;
  • the first energy concentrating disk 4011 can be made of materials with high temperature resistance, low transmittance, low absorption rate, or low emissivity and high reflectivity.
  • the emissivity of the first energy concentrating disk 4011 can be less than 0.5, preferably 0-0.4.
  • the radiation of various wavelength bands generated during the combustion process is efficiently absorbed by the coating material and converted into effective infrared heat radiation, and at the same time, due to the opposite material properties of the substrate 102, the The infrared heat radiation in the non-cooking direction can greatly improve the utilization efficiency of heat radiation, which can effectively absorb the heat energy of the combustion flame and reduce the heat loss.
  • the material of the first energy collecting disc 4011 may be stainless steel with low emissivity
  • the coating material may be black high temperature resistant paint.
  • the present application also provides a gas stove, which includes the above-mentioned burner.
  • the specific structure of the burner refers to the above-mentioned embodiments. Since the gas stove of the present application adopts all the technical solutions of the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments. I won't repeat them one by one.
  • the present application provides a fire cover 100, a burner 1000 and a gas stove with good comprehensive performance.
  • the fire cover 100, the burner 1000 and the gas stove have high combustion rate, high heat load, good fire uniformity, Fast ignition speed and good ignition stability.
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with “first”, “second” may expressly or implicitly include at least one of that feature.
  • plurality means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.
  • a first feature "on” or “under” a second feature may be in direct contact between the first and second features, or the first and second features indirectly through an intermediary touch.
  • the first feature being “above”, “over” and “above” the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature.
  • the first feature being “below”, “below” and “below” the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

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  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)

Abstract

一种火盖（100），包括：多个子火盖；和多个连接辐条（101），任意相邻的两个子火盖之间或部分相邻的两个子火盖之间通过多个沿周向间隔布置的连接辐条连接（101）。子火盖和连接辐条（101）上均设有多个火孔（104）。多个子火盖为两个并包括外火盖（103）和套装于外火盖（103）中的内火盖（102），多个连接辐条（101）沿周向间隔布置并分别连接外火盖（103）和内火盖（102）。内火盖（102）的顶沿高度低于或等于外火盖（103）内周壁的底沿高度，外火盖（103）、连接辐条（101）以及内火盖（102）上的火孔（104）的设置高度依次递减。内火盖（102）内设中环腔（1025）和内环腔（1024），外火盖（103）的外环腔（1033）、连接辐条（101）的辐条腔（1013）以及内火盖（102）的中环腔（1025）依次连通。包括该火盖（100）的燃烧器以及包括该燃烧器的燃气灶。

Description

火盖、燃烧器和燃气灶
相关申请的交叉引用
本申请要求2021年01月20日提交的中国专利申请202120158776.1、202110077920.3、202110077925.6、202120158779.5、202120162607.5、202120163235.8、202120162971.1和202110076246.7的权益，该申请的内容通过引用被合并于本文。
技术领域
本发明涉及燃烧器技术领域，具体地，涉及一种火盖、燃烧器和燃气灶。
背景技术
现今的燃气灶具越来越注重提高热负荷和高热效率，同时也注重通过均匀火焰布置完成食材均匀加热从而实现烹饪的营养健康。现有的燃气灶通过多种特定技术手段来提升燃气灶的性能，但往往也仅能实现单一指标的提升，难以完成产品体验全面提升，甚至部分单一指标提升的技术方案会影响燃气灶的其他性能指标。因此，一套全面且均衡的燃气灶性能提升技术方案是提高燃气灶产品整体体验的必然研究方向。
发明内容
针对现有技术的上述缺陷或不足，本发明的目的是提供一种新型的火盖、燃烧器和燃气灶，该火盖、燃烧器和燃气灶能大大提升燃烧器的综合性能。
为实现上述目的，本发明第一方面提供了一种火盖，该火盖包括：
多个子火盖，均呈环状且径向间隔套装；和
多个连接辐条，任意相邻的两个子火盖之间或部分相邻的两个子火盖之间通过多个沿周向间隔布置的连接辐条连接；
其中，子火盖和连接辐条上均设有多个火孔。
在一些实施例中，多个子火盖可为两个并包括：
外火盖；和
内火盖，套装于外火盖中；
其中，多个连接辐条沿周向间隔布置并分别连接外火盖和内火盖。
在一些实施例中，外火盖可包括外火盖外周壁和倾斜朝上且朝内设置的外火盖内周壁，内火盖包括倾斜朝上且朝内设置的内火盖内周壁和倾斜朝上且朝外设置的内火盖外周壁，外火盖内周壁上的多个火孔、内火盖内周壁上的多个火孔以及内火盖外周壁上的多个火孔分别沿周向间隔布置。
在一些实施例中，外火盖内周壁与水平面之间的锐角夹角可大于内火盖内周壁与水平面之间的锐角夹角。
在一些实施例中，外火盖内周壁上的多个火孔可沿周向间隔布置且沿高度方向间隔布置以形成多个外环火孔圈；和/或，内火盖外周壁上的多个火孔沿周向间隔布置且沿高度方向间隔布置以形成多个内环外火孔圈；和/或，内火盖内周壁上的多个火孔沿周向布置且沿高度方向间隔布置以形成多个内环内火孔圈。
在一些实施例中，内火盖的顶沿高度可低于外火盖的顶沿高度。
在一些实施例中，内火盖的顶沿高度可低于或等于外火盖内周壁的底沿高度，外火盖上的火孔、连接辐条上的火孔以及内火盖上的火孔的设置高度依次递减。
在一些实施例中，连接辐条可呈中空筒状且连接辐条的筒腔为辐条腔，连接辐条的两个筒端分别与外火盖和内火盖连接。
在一些实施例中，连接辐条可设有辐条腔并包括限定出辐条腔的辐条顶壁、辐条底壁以及连接在辐条顶壁和辐条底壁之间的两个辐条侧壁，两个辐条侧壁沿周向间隔布置且两个辐条侧壁与辐条顶壁的连接位置分别形成有倾斜朝上的倾斜壁部，两个倾斜壁部上间隔设有多个火孔。
在一些实施例中，两个倾斜壁部可包括沿顺时针朝向前布置的前侧倾斜壁部和沿顺时针周向向后的后侧倾斜壁部，多个连接辐条的前侧倾斜壁部或多个连接辐条的后侧倾斜壁部形成为弯折壁。
在一些实施例中，任意相邻的两个连接辐条和对应相邻的两个子火盖之间可形成有轴向贯通的二次空气通道。
在一些实施例中，连接辐条可沿火盖的径向延伸且连接辐条垂直于径向的横截面面积由外至内逐渐递减。
在一些实施例中，内火盖的内火盖外周壁和内火盖的内火盖内周壁之间可设有环状的分隔腔壁以将内火盖的环腔分隔成中环腔和内环腔，内火盖外周壁和分隔腔壁共同限定出中环腔，内火盖内周壁和分隔腔壁共同限定出内环腔。
在一些实施例中，外火盖内设外环腔，外环腔可与连接辐条的辐条腔连通。
在一些实施例中，外环腔、辐条腔以及中环腔可依次连通。
在一些实施例中，内火盖还可包括封盖中环腔的下部敞口的内火盖底壁。
相应地，本发明还提供了一种燃烧器，该燃烧器包括：
上述的火盖；和
炉头，设于火盖的下方并内设外环分配气道和内环分配气道，内环分配气道与内环腔连通，外环分配气道与外环腔连通。
在一些实施例中，炉头还可包括外环引射管、内环引射管、内环座、中环座以及外环座，内环座、中环座以及外环座从内至外依次套装并对应设有内环分配气道、中环分配气道以及所述外环分配气道，中环分配气道通过中外环连通通道与外环分配气道连通，外环引射管、外环分配气道、中外环连通通道以及中环分配气道依次连通，内环引射管与内环分配气道连通。
在一些实施例中，中环分配气道可与中环腔连通；或者，炉头还可包括可拆卸地设于中环座上并封盖中环分配气道的上部敞口的内环气道盖体。
在一些实施例中，中环座可包括限定出中环分配气道的中环座内周壁和中环座外周壁，外环座包括限定出外环分配气道的外环座内周壁和外环座外周壁，中外环连通通道沿径向延伸并连接于中环座外周壁与外环座内周壁之间。
在一些实施例中，外环引射管的外环引射管出气口设置在外环座外周壁上，中外环连通通道与外环引射管均呈直管状并沿同一径向向外延伸，中外环连通通道位于外环座内周壁上的连通通道进气口正对外环引射管出气口且连通通道进气口的面积小于外环引射管出气口的面积。
在一些实施例中，外环引射管和内环引射管可沿径向延伸且沿周向间隔布置。
在一些实施例中，内环引射管的管长可小于外环引射管的管长；和/或，内环引射管可位于外环座外周壁外的管长不长于15cm。
在一些实施例中，中环座外周壁的顶端周缘部与外环座内周壁的顶端周缘部之间可设有连接顶壁，连接顶壁设有轴向贯通的顶壁通气口。
在一些实施例中，内环座可包括限定出内环分配气道的内环座内周壁和内环座外周壁，中环座包括限定出中环分配气道的中环座内周壁和中环座外周壁，内环座外周壁和中环座内周壁形成为共用的中内环共用周壁。
在一些实施例中，内环座内周壁可环绕形成有轴向贯通的中心通气口。
在一些实施例中，炉头还可包括外环引射管、内环引射管、外环座以及内环座，外环座内设外环分配气道，内环座内设内环分配气道，外环引射管与外环分配气道连通，内环引射管与内环分配气道连通。
在一些实施例中，外环引射管的接口部可位于外环座的底部且外环引射管沿切线方向连通外环分配气道，内环引射管的接口部位于内环座的底部且内环引射管沿切线方向连通内环分配气道，外环引射管与内环引射管平行间隔设置。
在一些实施例中，燃烧器还可包括：
分气盘，设于外火盖与外环座之间并分别封盖外火盖的外环腔和外环座的外环分配气道，分气盘包括环状盘周壁，环状盘周壁上设有沿周向间隔布置且沿轴向贯穿的多个一次混合气过孔和沿周向间隔布置且沿径向贯穿的多个二次空气孔，外火盖的外环腔通过多个一次混合气过孔与外环座的外环分配气道连通。
在一些实施例中，二次空气孔的数量可大于等于10个。
在一些实施例中，二次空气孔垂直于自身轴向的横截面面积大于等于50mm 2且小于等于120mm 2。
在一些实施例中，一次混合气过孔的数量可大于等于10个，二次空气孔与一次混合气过孔沿周向依次交替分布；或者，多个二次空气孔沿周向均匀分组以形成多个沿周向间隔布置且至少包括两个二次空气孔的二次空气孔组，二次空气孔组与一次混合气过孔沿周向依次交替分布。
在一些实施例中，二次空气孔可为圆孔；或者，二次空气孔可为腰形孔且腰形孔的平行腰边 沿分气盘的轴向布置。
在一些实施例中，燃烧器还可包括套设于火盖和分气盘外的锅支架，锅支架包括：
聚能盘，呈环状；
支架部，设置在聚能盘上并用于顶撑锅具；以及
多个回热翅片，设置在聚能盘的盘底面上并沿周向间隔布置，任意两个回热翅片之间形成有二次空气回热通道。
在一些实施例中，任意相邻的两个回热翅片之间可连接有中间加强翅片。
在一些实施例中，中间加强翅片可呈T字形并包括翼板片和腹板片，翼板片的两端分别与相邻的回热翅片连接，腹板片向下延伸且底沿高度高于回热翅片的底沿高度。
在一些实施例中，多个所述回热翅片可呈平面片状并均沿径向延伸；或者，多个回热翅片均呈弯曲片状并呈漩涡状布置。
在一些实施例中，支架部可包括多个支架脚，多个支架脚设置在聚能盘的盘顶面上并沿周向间隔布置。
在一些实施例中，聚能盘可包括同心且上下布置的第一聚能盘和第二聚能盘，第一聚能盘的盘底面与第二聚能盘的盘顶面共同限定出隔热腔，多个支架脚设置在第一聚能盘的盘顶面上，多个回热翅片设置在第二聚能盘的盘底面上。
在一些实施例中，第一聚能盘的环状盘壁可形成有环状下凹槽；或者，第二聚能盘的盘底面可向下伸出有多个支撑底脚。
此外，本发明还提供了一种燃烧灶，该燃烧灶包括上述的燃烧器。
本申请的火盖、燃烧器和燃气灶的综合性能好，包括多个连接辐条和多个子火盖，多个子火盖均呈环状且相互套装，多个连接辐条沿周向间隔地连接在任意相邻的两个子火盖之间或多个连接辐条沿周向间隔地连接在部分相邻的两个子火盖之间，子火盖和连接辐条上均设有火孔，如此，不仅多个子火盖形成了多环火焰，连接辐条也在相邻的两环火焰之间的间隙位置形成火焰，使得火焰能均匀地分布在整个火平面上，有效提升燃烧器的匀火加热性能。此外，火盖的火孔数量大大增加，热负荷能够充分地释放，有利于提高燃烧器的热负荷；同时，连接辐条的火焰朝向内延伸，有利于提升燃烧器的整体效率。另外，多个连接辐条连接于相邻的两个子火盖之间，更有利于增加传火的速度和点火的稳定性。
本发明的其它特征和优点将在随后的具体实施方式部分予以详细说明。
附图说明
附图是用来提供对本发明的进一步理解，并且构成说明书的一部分，与下面的具体实施方式一起用于解释本发明，但并不构成对本发明的限制。在附图中：
图1和图3分别展示了根据本发明的第一具体实施例的燃烧器在不同视角下的结构示意图；
图2为图1的燃烧器的安装爆炸图；
图4和图5分别为图2中的火盖在不同视角下的结构示意图；
图6和图7分别为图2中的分气盘在不同视角下的结构示意图；
图8为图2中的炉头的结构示意图；
图9和图11分别为图1中的燃烧器在不同位置的剖视图，其中，图中未示出锅支架；
图10为图9的爆炸图；
图12为根据本发明的第二具体实施例的燃烧器的结构示意图；
图13为图12的燃烧器在不同角度下的安装爆炸图；
图14和图15分别为图13中的火盖在不同视角下的结构示意图；
图16和图17分别为图13中的分气盘在另一个视角下的结构示意图；
图18为图13中的气道盖体的结构示意图；
图19为图13中的炉头的安装爆炸图；
图20和图22分别为图12中的燃烧器在不同位置的剖视图，其中，图中未示出锅支架；
图21为图20的爆炸图；
图23为根据本发明的第三具体实施例的燃烧器的结构示意图；
图24和图25分别为图23的燃烧器在不同视角下的安装爆炸图；
图26和图27为图23中的锅支架在不同视角下的结构示意图；
图28为图26中的锅支架的剖视图；
图29为图26中的锅支架的爆炸图，其中，任意相邻的两个回热翅片之间增加有中间加强翅片。
附图标记说明：
1000      燃烧器
100       火盖                   101    连接辐条
1011      辐条前侧壁             1012   辐条后侧壁
1013      辐条腔                 102    内火盖
1021      内火盖内周壁           1022   内火盖外周壁
1023      分隔腔壁               1024   内环腔
1025      中环腔                 1026   内火盖底壁
10261     内环气道进气口         103    外火盖
1031      外火盖内周壁           1032   外火盖外周壁
1033      外环腔                 104    火孔
105       二次空气通道           106    稳火槽
200       炉头                   201    内环座
2011      内环分配气道           2012   内环座内周壁
2013      内环座外周壁           2015   内环座底壁
202       中环座                 2021   中环分配气道
2022      中环座底壁             2023   外环座外周壁
203       外环座                 2031   外环分配气道
2032      外环座内周壁           2033   外环座外周壁
2034      外环座底壁             204    内环引射管
205       外环引射管             2051   外环引射管出气口
206       中外环连通气道         2061   连通通道进气口
207       连接顶壁               208    气道盖体
2081      内环气道出气口         2082   插接凸起部
2083      第一环状插接槽         2084   第一环状插接壁
2085      第二环状插接槽         2086   第二环状插接壁
209       内环分配气道盖板       2091   气道出气口
300       分气盘                 301    环状盘周壁
3011      顶端环形周壁           302    一次混合气过孔
3021      混合气过孔径向外端部   3022   混合气过孔径向内端部
303       二次空气孔             500    中内环分气盘部件
400       锅支架                 401    聚能盘
4011      第一聚能盘             40111  环状下凹槽
4012      第二聚能盘             402    支架脚
403       回热翅片               404    中间加强翅片
4041      翼板片                 4042   腹板片
405       支撑底脚               406    二次空气回热通道
407       隔热腔
具体实施方式
以下结合附图对本发明的具体实施方式进行详细说明。应当理解的是，此处所描述的具体实施方式仅用于说明和解释本发明，并不用于限制本发明。
需要说明的是，在不冲突的情况下，本发明中的实施例及实施例中的特征可以相互组合。
在本发明中，在未作相反说明的情况下，使用的方位词如“上、下、顶、底”通常是针对附图所示的方向而言的或者是针对竖直、垂直或重力方向上而言的各部件相互位置关系描述用词。
下面将参考附图并结合实施例来详细说明本发明。
随着生活水平的不断提高，人们不断追求更高品质的生活方式和更加注重健康饮食的理念。但本申请的发明人发现，现有的燃烧器越来越注重高热负荷和高热效率性能而对匀火加热性能的关注不足，这导致用户在烹饪时，由于燃烧器的火焰分布不均导致锅具中局部区域的食材受热不均而 烧焦，严重影响食材的烹饪效果和用户的饮食健康。此外，食材高温烧焦后挥发在空气中的油烟含有较多的致癌物质，对人体健康带来较大的伤害，也严重影响了用户的烹饪体验。有鉴于此，本申请的发明人进行了不断的思考和研究，提供了一种能大大提升匀火加热性能的燃烧器，从而能给用户带来健康的饮食方式和烹饪体验。
本申请的火盖100包括多个子火盖和多个连接辐条101，多个子火盖均呈环状，多个子火盖的直径不同且从内向外径向间隔地套装，任意相邻的两个子火盖之间或部分相邻的两个子火盖之间通过多个沿周向间隔布置的连接辐条101连接，子火盖和连接辐条101上均设有多个火孔104。任意相邻的两个连接辐条101和对应相邻的两个子火盖之间形成有轴向贯通的二次空气通道105，如此，通过二次空气通道105可向上补充燃烧所需要的二次空气。
现有的火盖为了提升匀火加热性能，通常是通过设置多环的火焰来实现，火盖体积和占用空间较大。而本申请的火盖100则在相邻的两个子火盖之间设置了带有火孔104的连接辐条101，通过将相邻两环火焰之间的间隙位置合理地利用起来，如此，不仅多个子火盖形成了多环火焰，连接辐条101也在相邻的两环火焰之间的间隙位置形成火焰，使得火焰能均匀地分布在整个火平面上，进而更有效地提升了燃烧器的匀火加热性能，也在提高热负荷的基础上使得火盖的结构更加紧凑。其中，火焰实际上并非沿平面分布，而是在空间上分布，故火平面可理解为火焰的水平投影面。
其中，子火盖上的火孔1045与子火盖的环腔连通，连接辐条101上的火孔104与连接辐条101的辐条腔1013连通。多个子火盖可包括依次套设的两个、三个、四个或者更多个，如此，燃烧器1000可形成两环、三环、四环或更多环的火焰。多个子火盖可为同心且径向间隔地布置，即多个子火盖的中心点在同一竖直线上，或者，多个子火盖也可不为同心布置，即多个子火盖的中心点可部分偏移而不在同一竖直线上。任意相邻的两个子火盖之间可通过多个沿周向间隔布置的连接辐条101连接，例如，任意相邻的两个子火盖之间可通过四个、五个、六个或更多个沿周向间隔布置的连接辐条101连接，如此，该火盖100不仅能大大提升燃烧器1000的匀火加热性能，还能使得火盖100可形成为一个整体，便于用户拆洗和安装。当然，本申请不限于此，也可根据实际的应用场景将火盖100设置为分体的形式，即仅在部分相邻的两个子火盖之间设置多个沿周向间隔布置的连接辐条101。
可选地，连接辐条101可呈中空筒状且连接辐条101的筒腔为辐条腔1013，连接辐条101的两个筒端分别与外火盖103和内火盖102连接。连接辐条101可呈中空圆筒状，也可呈中空方形筒状或其他中空不规则筒状等。如图5所示，连接辐条101呈中空的近似椎形筒状。此外，每个子火盖中设有子火盖腔，子火盖上的火孔104与对应的子火盖腔连通；每个连接辐条101中设有辐条腔1013，连接辐条101上的火孔与对应的辐条腔1013连通。辐条腔1013可与相邻的一个或两个子火盖腔连通，如此，炉头可仅设置子火盖分配气道，子火盖腔和辐条腔1013共用子火盖分配气道，由此可相应地减少炉头的供气分配气道；当然，辐条腔1013也可不与相邻的子火盖腔连通，如此，炉头可相应地设置子火盖分配气道和辐条腔分配气道，本申请不限于此。
此外，通过在多个子火盖和多个连接辐条上设置火孔104，火盖100的火孔104数量大大增加，热负荷能够充分地释放，有利于提高燃烧器的热负荷性能。同时，由于火焰越靠近燃烧器的中心区域燃烧，热效率越高，本申请的多个连接辐条101的火焰朝向内延伸，有利于提升燃烧器的整体热效率。
另外，现有的燃烧器通常仅在某一环火盖上的某个位置进行点火，然后火焰沿周向一圈进行缓慢传开，传火速度较慢，导致部分燃气不能及时燃烧而造成浪费以及污染厨房的环境，甚至有些时候会由于风大或者存在液滴的原因而出现点不着的情况，影响用户的使用体验。本申请的火盖100由于在相邻的两个子火盖之间沿周向间隔设置有多个连接辐条101连接，在点火时，火焰能同时从多个连接辐条101上进行传播，相当于在整个火盖100上增加了更多个的点火点，从而可达到瞬间点燃的效果，大大增加了传火的速度和点火的稳定性，进而也使得用户的使用体验更佳。
在一些实施例中，如图4和图5所示，多个子火盖的数量可为两个并包括外火盖103和内火盖102，内火盖102径向间隔地套装于外火盖103内，多个连接辐条101沿周向间隔布置并分别连接外火盖103和内火盖102。任意相邻的两个连接辐条101、外火盖103以及内火盖103之间可形成有二次空气通道105，如此，通过二次空气通道105可向上补充燃烧所需要的二次空气。该火盖100的结构简单，可使得火焰更均匀地弥散在整个火平面上，能大大提升燃烧器的匀火加热性能和提高燃烧器的热负荷和热效率，此外，内火盖102和外火盖103成为一个整体，便于用户拆洗和安装。
可选地，外火盖103可包括外火盖外周壁1032和外火盖内周壁1031，外火盖内周壁1031倾斜朝上且朝内设置且外火盖内周壁1031上的多个火孔104沿周向间隔布置，内火盖102包括内火盖 内周壁1021和内火盖外周壁1022，外火盖内周壁1031、内火盖内周壁1021以及内火盖外周壁1022上均设有多个沿周向间隔布置的火孔104。内火盖内周壁1021倾斜朝上且朝内设置且内火盖内周壁1021上的多个火孔104沿周向间隔布置，内火盖外周壁1022倾斜朝上且朝外设置且内火盖外周壁1022上的多个火孔104沿周向间隔布置。如图4和图5所示，外火盖103的外火盖外周壁1032不设置火孔，仅在外火盖内周壁1031上设置火孔104，可产生聚焰效果，也使得火焰朝向中心部燃烧，热效率更高；同时，可使得外环火往内包锅，从而可提高加热效率。内火盖102位于火盖100的中心部，内火盖内周壁1021和内火盖外周壁1022均可设置火孔104以尽量增加火孔104的设置数量。并且，外火盖内周壁1031、内火盖内周壁1021以及内火盖外周壁1022倾斜设置，即多个火孔104也倾斜朝向出火，更有利于火焰在整个燃烧空间的均匀性，也有利于一次混合气体与二次空气的混合，进而有利于提升燃烧效率。其中，定义相对靠近火盖100的中心的位置为“内”，相对远离火盖100的中心的位置为“外”。一次混合气体为燃气和一次空气的混合气体。
可选地，由于外火盖103的直径大，为了增加外火盖103的内聚效果，外火盖内周壁1031与水平面之间的锐角夹角可相应地增加，使得外火盖内周壁1031倾斜度增加；而内火盖102的直径小，为了减弱内火盖102的径向相对位置的内环火焰对彼此之间的冲击，内火盖内周壁1021与水平面之间的锐角夹角可相应地减少，使得内火盖内周壁1021的倾斜度减少。由于外火盖103的直径比内火盖102的直径大，故设置外火盖内周壁1031与水平面之间的锐角夹角大于内火盖内周壁1021与水平面之间的锐角夹角。并且，外火盖内周壁1031、内火盖内周壁1021以及内火盖外周壁1022三个周壁的朝向角度不同，可使得三个周壁上的火孔104在空间上的出火朝向不同，进一步可使得火焰在整个燃烧空间的布置更加均匀。
可选地，外火盖内周壁1031上的多个火孔104沿周向间隔布置且沿高度方向间隔布置以形成多个外环火孔圈；和/或，内火盖外周壁1022上的多个火孔104沿周向间隔布置且沿高度方向间隔布置以形成多个内环外火孔圈；和/或，内火盖内周壁1021上的多个火孔104沿周向布置且沿高度方向间隔布置以形成多个内环内火孔圈。在外火盖内周壁1031上沿高度方向间隔布置多个外环火孔圈，和/或，在内火盖外周壁1022上沿高度方向间隔布置多个内环外火孔圈；和/或，内火盖内周壁1021上沿高度方向间隔布置多个内环内火孔圈，如此，通过将多个的火孔圈设置在不同的高度上，可避免火焰在某一高度上堆积，使得火焰能在更大的空间内进行燃烧，使得二次空气更容易进入和混合，从而能提高燃烧效率；此外，通过设置多个的火孔圈可增加火孔104的数量，进一步提高燃烧器的热负荷。相邻两个火孔圈之间的火孔也可沿周向错开布置，从而可避免火焰在某一周向位置堆积。
具体地，如图4和图5所示，外火盖内周壁1031上设有两个外环火孔圈，内火盖外周壁1022上设有两个内环外火孔圈，内火盖内周壁1021上设有一个内环内火孔圈。当然，本申请不限于此，外火盖内周壁1031和/或内火盖外周壁1022和/或内火盖内周壁1021上可根据实际使用需要设置两个、三个、四个或更多个火孔圈；相邻两个火孔圈之间的高度间隔尺寸可相同也可不相同，可根据实际使用需要进行合理设置。
进一步地，内火盖102的顶沿高度可低于外火盖103的顶沿高度，如此，可使得外火盖103的火孔104和内火盖102上的火孔104在垂直方向上的高度位置至少部分错开布置，避免外火盖103的火焰和内火盖102的火焰在同一高度位置堆积，也使得火焰能在更大的空间内燃烧，使得空间中的二次空气更多，燃烧效率更高，热负荷能够充分地释放。其中，内火盖102的顶沿高度低于外火盖103的顶沿高度时，外火盖103的底沿高度可高于、等于或低于内火盖102的顶沿高度。当外火盖103的底沿高度低于内火盖102的顶沿高度时，外火盖103上的火孔104与内火盖102上的火孔104在垂直方向上的高度位置可部分重叠布置。
更进一步地，内火盖102的顶沿部的顶沿高度低于或等于外火盖内周壁1031的底沿部的底沿高度，如此，外火盖103上的火孔104与内火盖102上的火孔104在垂直方向上的高度位置可完全错开重叠布置。并且，外火盖103上的火孔104、连接辐条101上的火孔104以及内火盖102上的火孔104的高度依次递减，可使得整个火盖100的火孔104在垂直方向上的高度位置可错开重叠布置，进一步使得火焰在更大的空间内燃烧，避免火焰堆积，使得二次空气更容易进入，燃烧效率更高，热负荷能够充分地释放。
可选地，连接辐条101包括限定出辐条腔1013的辐条顶壁、辐条底壁以及连接在辐条顶壁和辐条底壁之间的两个辐条侧壁，两个辐条侧壁沿周向间隔布置，两个辐条侧壁与辐条顶壁的连接位置分别形成有倾斜朝上的倾斜壁部，两个倾斜壁部上间隔设有多个火孔104。两个倾斜壁部上的多个火孔104与连接辐条101的辐条腔1013连通。如图4所示，在连接辐条101上，两个倾斜壁部上 的火孔104沿周向设有相反的朝向，使得火盖100在空间上的出火朝向角度增加，火焰能更均匀地弥散在整个空间上，燃烧效率更高，也可使得热负荷能够充分地释放。此外，火孔104设置在连接辐条101的倾斜壁部上，可使得火焰倾斜传播，从而可提高彼此之间的引燃效果，当出现熄火或传火不好的情况时能及时将相邻的火孔点燃。
可选地，如图4所示，两个倾斜壁部包括沿顺时针朝向前布置的前侧倾斜壁部1011和沿顺时针朝向后布置的后侧倾斜壁部1012，多个连接辐条101的前侧倾斜壁部1011或多个连接辐条101的后侧倾斜壁部1012形成为弯折壁，多个火孔104在弯折壁上间隔布置。如图4所示，多个同一朝向的弯折壁可形成旋焰效果，出火旋向一致的火焰可对燃烧区域产生一定的扰流效果，从而可促进二次空气均匀分布，提高燃烧效率。此外，多个同一朝向的弯折壁的形成旋焰效果在视觉上使得火焰产生旋转的运动感，更为美观。
在一些实施例中，火盖100可仅设有两个环腔和多个辐条腔1013，即当外火盖103内设外环腔1033、连接辐条101设有辐条腔1013、内火盖102仅内设内环腔1024时，辐条腔1013可与内环腔1024连通或辐条腔1013可与外火盖103的外环腔1033连通。如此，连接辐条101的辐条腔1013可从内火盖102的内环腔1024或外火盖103的外环腔1033中引入一次混合气体。
在另一些实施例中，火盖100可设有三个环腔和多个辐条腔1013，此时内火盖102的内火盖外周壁1022和内火盖102的内火盖内周壁1021之间可设有环状的分隔腔壁1023以将内火盖102的环腔分隔成中环腔1025和内环腔1024，内火盖外周壁1022和分隔腔壁1023共同限定出中环腔1025，内火盖内周壁1021和分隔腔壁1023共同限定出内环腔1024。如图4和图5所示，内火盖外周壁1022上的火孔104与中环腔1025连通，内火盖内周壁1021上的火孔104与内环腔1024连通。中环腔1025贴近内环腔1024设置，从而使得内火盖102在火盖100的中心部可形成两环火焰，进而使得火力更大、热负荷更高、火焰更均匀地弥散。此外，外火盖103中设有外环腔1033，中环腔1025和内环腔1024集成设置在内火盖102中，即内外两环火盖形成三环腔，不仅结构上更加简洁紧凑，还能节省钣金材料，降低生产成本。
进一步地，连接辐条101的辐条腔1013可与外火盖103的外环腔1033连通或连接辐条101的辐条腔1013可与内火盖102的中环腔1025连通，如此，连接辐条101的辐条腔1013可从外火盖103的外环腔1033或内火盖102的中环腔1025引入一次混合气体。例如，当连接辐条101的辐条腔1013与外火盖103的外环腔1033连通时，火盖100可将外环腔1033中的部分一次混合气体引入到相对靠近燃烧中心区域的辐条腔1013进行燃烧，从而可提高燃烧器整体的燃烧效率。此外，外环腔1033与辐条腔1013可共用一次混合气分配气道和引射通道，即外环腔1033与辐条腔1013的一次混合气体可均由同一个燃气喷嘴和进气通道供应，不仅可以实现同步调节，配合简单的阀门调控策略可实现整个火焰面同步调节，简化了控制逻辑，还有利于降低燃烧器的生产成本。与此同时，多个连接辐条101可增加燃烧器的气流通道，有利于气流均匀布置和稳定燃烧。
更进一步地，外环腔1033、辐条腔1013以及中环腔1025可依次连通，如此，外环腔1033的一次混合气体可通过辐条腔1013引入到内火盖102的靠近燃烧中心区域的中环腔1025燃烧，进一步提高了燃烧器整体的燃烧效率。此外，火盖100可仅由内环引射管和外环引射管两个引射管以及内环燃气喷嘴和外环燃气喷嘴两个燃气喷嘴进行供气即可形成三环火焰，即外环腔1033、辐条腔1013以及中环腔1025的一次混合气体可均由同一个燃气喷嘴和进气通道供应，进一步实现同步调节，阀门调控策略和控制逻辑也可更加简单。并且，在不额外增加喷嘴和引射管的情况下实现了燃烧器的三环供气，不仅简化控制逻辑和结构，还大大降低了燃烧器的生产成本。多个辐条腔1013是外环腔1033和中环腔1025的辅助通道，进一步有利于气流均匀布置和稳定燃烧。并且，外环腔1033和中环腔1025通过多个辐条腔1013连通，可减少燃烧空间中不同区域的压差，背压减少，从而可更均匀地出火，进而也能提高燃烧的均匀性，使得火焰更均匀地弥散在整个空间。
此外，当用户需要进行大火烹饪时，往往期望火力越大越好且能在提供大火力的同时保证匀火性。外环腔1033、辐条腔1013以及中环腔1025依次连通，此时内环引射管和外环引射管两个引射管以及内环燃气喷嘴和外环燃气喷嘴两个燃气喷嘴可相应给三个环腔以及多个辐条腔1013供气，由此外环腔1033、辐条腔1013、中环腔1025以及内环腔1024对应可形成三环火焰和多个条中间火焰，保证了炉头200有足够高的热负荷进行大火烹饪，也能使得燃烧器的匀火性和热效率更好。而当用户需要进行小火烹饪时，往往期望火力尽可能的小，此时外环燃气喷嘴不对外环腔1033和中环腔1025供气，即外环腔1033和中环腔1025对应的火焰熄灭，仅内环引射管和内环燃气喷嘴向内环腔1024供气以使得仅有内环腔1024能形成内环火焰，实现小火烹饪。并且，由于中环腔1025贴近内环腔1024设置，保证了在大火烹饪时的内环燃烧区域的高热负荷和匀火性要求，故向内环腔1024 供气的内环燃气喷嘴可尽量做小，从而能在小火烹饪时提供更小的火力，满足用户的更小火力的小火烹饪的需求，用户体验更好。
可选地，连接辐条101沿火盖100的径向延伸，如此，可使得连接辐条101在外火盖103和内火盖102之间的布置路径最短、减少流阻，可使得外环腔1033的一次混合气体能更顺畅地通过辐条腔1013进入中环腔1025中。此外，连接辐条101垂直于径向的横截面的面积由外至内逐渐递减，可保证二次空气通道105有足够的通道面积，进而使得二次空气能更好地向上补充。
可选地，火盖100上还可设有起到稳定火焰燃烧的作用的稳火槽106，如图4所示，内火盖102上可设有环状稳火槽和连接辐条101上设有条状稳火槽。
需要说明的是，上述为多个子火盖的数量是两个时的具体实施例，当然，多个子火盖可为三个、四个、五个或更多个，此时每个子火盖可设有子火盖腔，辐条腔1013可分别与邻接在辐条腔1013两端的子火盖腔连通，如此，可减少喷嘴和分配气道的设置数量，有利于简化控制逻辑和燃烧器的结构，并能降低炉头的生产成本，提高燃烧器的燃烧效率和热负荷。
另外，本申请的火盖100不仅综合性能好，结构也合理简单，可采用厚度较轻薄的钣金件加工而成，制造工艺简单和制造成本低。
相应地，本申请还提供了一种燃烧器1000，该燃烧器1000包括上述的火盖100和位于火盖100下方进行供气的炉头200。该火盖100的具体结构参照上述实施例，由于本申请的燃烧器1000采用了上述所有实施例的全部技术方案，因此至少具有上述实施例的技术方案所带来的所有有益效果，在此不再一一赘述。
由于上述火盖100可具有多种不同的结构，相应地，燃烧器1000中配置的炉头200也对应有所不同。例如火盖100可仅设有两个环腔和多个辐条腔1013，即若外火盖103内设外环腔1033、连接辐条101设有辐条腔1013以及内火盖102仅内设内环腔1024，辐条腔1013可与内火盖102的内环腔1024连通或辐条腔1013可与外火盖103的外环腔1033连通，此时，炉头200可仅内设外环分配气道2031和内环分配气道2011，内环分配气道2011与内环腔1024连通，外环分配气道2031与外环腔1033连通。当辐条腔1013与外环腔1033连通时，外环分配气道2031能通过外环腔1033向辐条腔1013供一次混合气体；当辐条腔1013与内环腔1024连通时，内环分配气道2011能通过内环腔1024向辐条腔1013供一次混合气体。如此，火盖100能通用于设有两环分配气道的炉头200上，而无需在炉头上额外增加独立供气给辐条腔1013的分配气道。
又例如火盖100可设有三个环腔和多个辐条腔1013，即若外火盖103内设外环腔1033、连接辐条101设有辐条腔1013以及内火盖102内设内环腔1024和中环腔1025，连接辐条101的辐条腔1013可与外火盖103的外环腔1033连通；或者，连接辐条101的辐条腔1013可与内火盖102的中环腔1025连通；或者，外环腔1033、辐条腔1013以及中环腔1025可依次连通。此时，炉头200可为依次设有内环分配气道2011、中环分配气道2021以及外环分配气道2031三个分配气道的炉头，或者，炉头200可为仅设有外环分配气道2031和内环分配气道2011两个分配气道的炉头。若炉头200依次设有内环分配气道2011、中环分配气道202以及外环分配气道2031三个分配气道，内环分配气道2011、中环分配气道2021以及外环分配气道2031对应与火盖100的内环腔1024、中环腔1025以及外环腔1033连通，当辐条腔1013与外环腔1033连通时，外环分配气道2031能通过外环腔1033向辐条腔1013供一次混合气体；当辐条腔1013与中环腔1025连通时，中环分配气道2021能通过中环腔1025向辐条腔1013供一次混合气体；当外环腔1033、辐条腔1013以及中环腔1025依次连通时，外环分配气道2031能通过外环腔1033向辐条腔1013供一次混合气体和/或中环分配气道2021能通过中环腔1025向辐条腔1013供一次混合气体。如此，三个环腔的火盖100能通用于设有三环分配气道的炉头200上，而无需在炉头上额外增加独立供气给辐条腔1013的分配气道。若炉头200仅设有外环分配气道2031和内环分配气道2011两个分配气道，内环分配气道2011与内环腔1024连通，外环分配气道2031与外环腔1033连通，火盖100的内火盖102还需相应包括封盖中环腔1025的下部敞口的内火盖底壁1026，当辐条腔1013与外环腔1033连通时，外环分配气道2031能通过外环腔1033向辐条腔1013供一次混合气体；当外环腔1033、辐条腔1013以及中环腔1025依次连通时，外环分配气道2031能通过外环腔1033向辐条腔1013和中环腔1025供一次混合气体。如此，三个环腔的火盖100能通用于设有两环分配气道的炉头200上，而无需在炉头上额外增加独立供气给辐条腔1013的分配气道。
本申请的火盖100通用性好，可适配多种不同的炉头200，以下将举例对本申请的燃烧器1000进行说明。
第一实施例的燃烧器1000：
如图1至图11所示，在第一实施例的燃烧器1000中，炉头200设有内环分配气道2011、中环分配气道2021以及外环分配气道2031，火盖100可配合在设有外环分配气道2031、中环分配气道2021以及内环分配气道2011三个分配气道的炉头200上使用，以形成三环火焰。中环分配气道2021位于内环分配气道2011与外环分配气道2031之间。外环分配气道2031与外环腔1033连通，中环分配气道2021与中环腔1025连通，内环分配气道2011与内环腔1024连通。如此，炉头200的三个分配气道可对应向火盖100的三个环腔进行稳定供气，出火更加稳定可靠。
可选地，中环分配气道2021可通过中外环连通气道206与外环分配气道2031连通，炉头200还包括内环引射管204和外环引射管205，内环引射管204与内环分配气道2011连通，外环引射管205依次连通外环分配气道2031、中外环连通气道206以及中环分配气道2021。这样，外环引射管205可依次给外环分配气道2031和中环分配气道2021提供一次混合气体。由于火焰越靠近燃烧器的中心区域燃烧，热效率越高，本实施例的炉头200将外环分配气道2031的一次混合气体引入至相对靠近中心燃烧区的中环分配气道2021，有利于提升燃烧器的整体燃烧效率。并且，本实施例的炉头200仅需两个引射管即可给三个分配气道供气以形成三环火，不仅可使得炉头200的结构更加简单，还能减少引射管和喷嘴等生产部件的设置数量，大大节省了生产成本和更便于后期的维护。此外，本实施例的炉头200仅需两个引射管即可给三个分配气道供气，阀门调控策略和控制逻辑也可更加简单。
此外，中环分配气道2021与外环分配气道2031连通，当用户需要进行大火烹饪时，往往期望火力越大越好且能在提供大火力的同时保证匀火性，此时内环引射管204和外环引射管205相应给三个分配气道供气，内环分配气道2011、中环分配气道2021以及外环分配气道2031对应可形成三环火焰，保证了炉头200有足够高的热负荷进行大火烹饪，且三环火焰加热的匀火性和热效率更好。而当用户需要进行小火烹饪时，往往期望火力尽可能的小，此时内环引射管204不对外环分配气道2031和中环分配气道2021供气，即外环分配气道2031和中环分配气道2021对应的火焰熄灭，仅内环引射管204向内环分配气道2011供气以使得仅有内环分配气道2011能形成内环火焰，实现小火烹饪。并且，由于中环分配气道2021贴近内环分配气道2011设置，保证了在大火烹饪时的内环燃烧区域的高热负荷和匀火性要求，故向内环分配气道2011供气的内环燃气喷嘴可尽量做小，从而能在小火烹饪时提供更小的火力，满足用户的更小火力的小火烹饪的需求，用户体验更好。
可选地，如图8所示，本实施例的炉头200可包括依次套装的内环座201、中环座202以及外环座203，外环座203可包括限定出外环分配气道2031的外环座内周壁2032、外环座外周壁2033以及外环座底壁2034，中环座202可包括限定出中环分配气道的中环座内周壁、中环座外周壁2023以及中环座底壁2022，内环座201可包括限定出内环分配气道2011的内环座内周壁2012、内环座外周壁2013以及内环座底壁2015。
其中，中间连通通道的布置形式和布置位置可多种多样，例如中间连通通道可为弯曲通道且两端分别与外环座底壁2034和中环座底壁2022连接以对应与外环分配气道2031和中环分配气道2021连通；或者，中间连通通道也可为弯曲通道且两端分别外环座底壁2034和中环座外周壁2023连接以对应与外环分配气道2031和中环分配气道2021连通等。或者，如图11所示，中间连通通道可为沿径向设置在中环座外周壁2023与外环座内周壁2032之间的中外环连通气道206，且该中外环连通气道206为直通道，如此，不仅可使得炉头200的结构更简单合理，还可将中外环连通气道206设置为直通道，以尽量缩短通道长度和减少流阻。此外，图11中的中外环连通气道206仅示出一个，但本申请不限于此，中外环连通气道206也可为多个并沿周向间隔地布置在中环座外周壁2023与外环座内周壁2032之间。
进一步地，如图8和图11所示，内环座外周壁2013和中环座内周壁可形成为共用的中内环共用周壁。如此，可使得中环分配气道2021更贴近内环分配气道2011布置，可使得中环分配气道2021的火焰更贴近中心区域燃烧，热效率更高。并且在保证大火烹饪时的内环燃烧区域的高热负荷和匀火性要求的情况下，可将内环燃气喷嘴尽量做小，从而能在小火烹饪时提供更小的火力。此外，内环座外周壁2013和中环座内周壁形成为共用的中内环共用周壁，不仅可减少炉头的壁体材料，降低炉头的生产成本，还可使得炉头的结构更加简单紧凑。
具体地，如图8所示，内环座201套装于外环座203中，中环座202套装于外环座203和内环座201之间，相应地，外环分配气道2031、中环分配气道2021以及内环分配气道2011也从外向内依次套装。中环分配气道2021与内环分配气道2011之间的间距小于中环分配气道2021与外环分配气道2031之间的间距，中环分配气道2021与内环分配气道2011毗邻设置以尽量靠近位于中心部的内环分配气道2011，如此，可使得中环分配气道2021的火焰更靠近中心区域燃烧，热效率更高。 并且，外环座底壁2034、中环座底壁2022以及内环座底壁2015的顶面均形成为沿气流方向的倾斜爬坡面，有利于减少一次混合气的流阻，出气更流畅，火焰燃烧的稳定性更好。其中，一次混合气体为燃气和一次空气的混合气体。
可选地，外环引射管205的外环引射管出气口2051固定在外环座外周壁2033上，中外环连通气道206与外环引射管205均呈直管状并沿同一径向向外延伸，这样，可使得中外环连通气道206的通道长度最短，流阻更小。并且，如图11所示，中外环连通气道206的连通通道进气口2061设于外环座内周壁2032上，连通通道进气口2061正对外环引射管出气口2051且连通通道进气口2061的面积小于外环引射管出气口2051的面积，如此，可使得一次混合气的流阻更小，从而使得一次混合气更顺畅地导向中环分配气道2021以保证中环分配气道2021有足够的供气量。
进一步地，内环引射管204可为直管状，由此可减少内环引射管24的流阻和流动压力损失，使得炉头200在小火烹饪时的小火能更小且稳定燃烧。
更进一步地，外环引射管205和内环引射管204可沿径向延伸且沿周向间隔布置。由于中外环连通气道206的存在，若采用现有的炉头的内外引射管平行并排方式，则内环引射管24、中外环连通气道206或外环引射管25的局部需设置成拐弯状，由此会导致一次混合气的流阻增大。为此，如图1至图3所示，本实施例的的外环引射管205和内环引射管204沿周向间隔地固定在外环座203的外环座外周壁2033上，由此可更便于中外环连通气道206的布置，也可将外环引射管205和内环引射管204均设置成沿径向延伸的直管状，减少流阻，进而使得火焰也更稳定一些，小火烹饪的时候也可以把小火做得更小一点。如图1至图3所示，外环引射管205和内环引射管204可呈直角错开布置，当然，本申请不限于此，外环引射管205和内环引射管204可呈锐角或钝角错开布置。
可选地，内环引射管204位于外环座外周壁2033外的管长可不长于15cm，这样，有利于增加内环引射管204的次空气引射系数，提高了空气的进入量以及燃气与空气的混合速度和流动速度，在小火状态下进气压损降低，保证小火工况稳定燃烧。进一步地，内环引射管204位于外环座外周壁2033外的管长可长于10cm，更进一步地，内环引射管204位于外环座外周壁2033外的管长可长于6cm且短于10cm。
由于中心燃烧区域设置了内环分配气道2011和中环分配气道2021，中心燃烧区域的热负荷大大提高，相应的就需要往中心燃烧区域补充更多的空气，会导致空气补充不足从而引起燃烧状况恶化，进而使得热效率下降和烟气排放不达标。因此，可在炉头200上增加设置能补充二次空气的通道。
可选地，中环座外周壁2023的顶端周缘部与外环座内周壁2032的顶端周缘部之间可设有连接顶壁207，连接顶壁207可设有轴向贯通的顶壁通气口(图中未示出)。如此，可通过顶壁通气口在中环座外周壁2023和外环座内周壁2032之间沿轴向向上对中心燃烧区域补充二次空气，使得中心燃烧区域的燃烧更加充分、热效率更高，且可降低有害气体的排放。
可选地，内环座内周壁2012可环绕形成有轴向贯通的中心通气口(图中未示出)，这样，可通过中心通气口沿轴向向上对中心燃烧区域补充二次空气，由于有足够的空气的补充，使得中心燃烧区域的燃烧更为充分，一氧化碳的排放量更低，燃烧效率更高，同时燃气在燃烧时，中心燃烧区域的气流稳定，从而燃烧也稳定，解决了内环离焰熄火等问题。
此外，炉头200还设有用于安装点火针的点火针容置槽，点火针容置槽可设置在中心通气口中。本申请的炉头200结构合理紧凑，体积较小，占用厨房空间小，有利于向小居室用户进行推广。
另外，由于火盖100的外环腔1033、辐条腔1013以及中环腔1025依次连通，炉头200的外环分配气道2031、中外环连通气道206以及中环分配气道2021依次连通，外环分配气道2031与外环腔1033连通，以及中外环连通气道206与中环腔1025连通，即外环分配气道2031、中外环连通气道206、中环分配气道2021、中环腔1025、辐条腔1013以及外环腔1033首尾依次连通，如此，外环腔1033和中环腔1025之间存在上下两个连通通道，大大降低了外环腔1033和中环腔1025之间的流通的负压、两者的压差更小，可使得一次混合气体更均匀地分布在外环腔1033和中环腔1025之间，进而使得燃烧器1000的出火更加均匀和稳定，匀火性更好。
具体地，如图1至图3所示，第一实施例的燃烧器1000可包括炉头200、分气盘300、中内环分气盘部件500以及火盖100。第一实施例的燃烧器1000的火盖100包括外环腔1033、辐条腔1013、中环腔1025以及内环腔1024，外环腔1033、辐条腔1013以及中环腔1025依次连通。火盖100的外火盖103盖设于分气盘300上，外火盖103的外环腔1033与多个一次混合气过孔302连通。炉头200设有内环分配气道2011、中环分配气道2021以及外环分配气道2031，内环分配气道2011设于内环座201中并与内环引射管204连通，中环分配气道2021设于中环座202中并通过中外环连 通气道206与外环分配气道2031连通，外环分配气道2031设于外环座203中并与外环引射管205连通。分气盘300设于外环座203上且盖设外环分配气道2031的上部敞口，多个一次混合气过孔302与外环分配气道2031连通。中内环分气盘部件500连接于内环座201和中环座202的上方且连接于内火盖102的下方，即内火盖102通过中内环分气盘部件500连接于炉头200的内环座201和中环座202上。中内环分气盘部件500上设有轴向贯通的中环一次混合气过孔和内环一次混合气过孔，内环腔1024的下部敞口通过中内环分气盘部件500的内环一次混合气过孔与炉头200的内环分配气道2011连通，中环腔1025的下部敞口通过中内环分气盘部件500的中环一次混合气过孔与炉头200的中环分配气道2021连通。
其中，在第一实施例的燃烧器1000中，外环引射管205的一次混合气体的流通路径：外环引射管205的一次混合气体从外环引射管出气口2051进入外环分配气道2031，进入外环分配气道2031的部分一次混合气体流向外环分配气道2031的左右两侧的通道中并向上通过分气盘300的多个一次混合气过孔302均匀进入火盖100的外环腔1033中。进入外环腔1033的部分一次混合气体经过外火盖103的火孔104排出并进行燃烧，进入外环腔1033的另一部分一次混合气体可依次进入连接辐条101的辐条腔1013和内火盖102的中环腔1025并经过连接辐条101和内火盖外周壁1022上的火孔104排出并进行燃烧。进入外环分配气道2031的另一部分一次混合气体经过中外环连通气道206流向中环分配气道2021并向上进入内火盖102的中环腔1025，进入中环腔1025的部分一次混合气体经过内火盖外周壁1022上的火孔104排出并进行燃烧，进入中环腔1025的另一部分一次混合气体可依次进入连接辐条101的辐条腔1013和外火盖103的外环腔1033并经过连接辐条101和外火盖103上的火孔104排出并进行燃烧。
内环引射管204的一次混合气体的流通路径：内环引射管204的一次混合气体流向内环分配气道2011并向上进入内火盖102的内环腔1024，进入内环腔1024的一次混合气体经过内火盖内周壁1021上的火孔104排出并进行燃烧。
第二实施例的燃烧器1000：
如图12至22所示，第二实施例的燃烧器1000中的炉头200在第一实施例的燃烧器1000中的炉头200的基础上仅增加了气道盖体208，内环气道盖体208可拆卸地设于中环座202上方并封盖中环分配气道2021的上部敞口。如此，通过气道盖体208封盖了中环分配气道2021的上部敞口，可使得具有三个分配气道的炉头200变为两个分配气道的炉头使用，从而使得炉头200的通用性和性能可拓展性更好。
在第二实施例的燃烧器1000中，火盖100可配合在设有外环分配气道2031、中环分配气道2021以及内环分配气道2011三个分配气道的炉头200上使用，以形成三环火焰。该炉头200包括内环引射管204、外环引射管205、内环座201、中环座202、外环座203以及气道盖体208，内环座201、中环座202以及外环座203从内向外依次套装。内环分配气道2011设于内环座201内并与内环引射管204连通；外环分配气道2031设于外环座203内并与外环引射管205连通，中环分配气道2021设于中环座202内并通过中外环连通气道206与外环分配气道2031连通；气道盖体208设于内环座201和中环座202上方。
具体地，如图12至22所示，第二实施例的燃烧器1000可包括炉头200、分气盘300以及火盖100。第二实施例的燃烧器1000的火盖100包括外环腔1033、辐条腔1013、中环腔1025以及内环腔1024，外环腔1033、辐条腔1013以及中环腔1025依次连通。火盖100的外火盖103盖设于分气盘300上，外火盖103的外环腔1033与多个一次混合气过孔302连通。炉头200设有内环分配气道2011、中环分配气道2021以及外环分配气道2031，内环分配气道2011设于内环座201中并与内环引射管204连通，中环分配气道2021设于中环座202中并通过中外环连通气道206与外环分配气道2031连通，外环分配气道2031设于外环座203中并与外环引射管205连通，气道盖体208设于中环座202上并封盖中环分配气道2021的上部敞口。分气盘300设于外环座203上且盖设外环分配气道2031的上部敞口，多个一次混合气过孔302与外环分配气道2031连通。内火盖102连接于炉头200的内环座201和中环座202上且内环腔1024的下部敞口与炉头200的内环分配气道2011连通。
其中，在第二实施例的燃烧器1000中，由于内火盖102的中环腔1025未有与炉头200的分配气道连通，故如图15所示，内火盖102还包括封盖中环腔1025的下部敞口的内火盖底壁1026，如此，可避免中环腔1025的一次混合气体从中环腔1025的下部敞口泄露。另外，为了使得燃烧器1000的小火更小，内环的燃气喷嘴尽量做小，供气量较小。此时，为了使得供给内火盖102的内环腔1024的一次混合气体更加均匀稳定，燃烧率更好，如图15和图21所示，内火盖102的内火盖底 壁1026还封盖内环腔1024的环状下部敞口，并且，内火盖底壁1026还设有与内环腔1024连通的且进气横截面积相对减小的内环气道进气口10261，相应地，气道盖体208还向内延伸以设置在内环座201上并封盖内环分配气道2011的上部敞口，气道盖体208上设有轴向贯通的内环气道出气口2081，内环分配气道2011通过内环气道出气口2081与内环腔1024连通。即在内火盖102连接于炉头200的内环座201和中环座202上的同时，内环气道出气口2081与内环气道进气口10261连通以向内环腔1024供气。其中，如图18和图19所示，气道盖体208呈圆盘状并匹配地盖设在中环座202和内环座201上以盖设内环分配气道2011和中环分配气道2021，内环气道出气口2081对为两个并称地设于气道盖体208上并与内环分配气道2011连通。当然，气道盖体208还可例如为椭圆形等形状，内环气道出气口2081还可为三个、四个或五个等，多个内环气道出气口2081可沿周向均匀间隔地布置在气道盖体208上并与内环分配气道2011连通，本申请不限于此。气道盖体208的中部可形成有热电偶穿出孔和点火针穿出孔。
此外，如图18至图21所示，内环气道出气口2081的口沿部可从气道盖体208向上伸出以形成插接凸起部2082，内环气道进气口10261的口沿部可从内火盖底壁1026向下伸出以形成围绕内环气道进气口10261的插接槽部，如此，气道盖体208的插接凸起部2082可通过插接在内火盖底壁1026的插接槽部中以形成限位安装结构，增强火盖100与炉头200的连接可靠性；并且，此时可省却内火盖102炉头200之间的中内环分气盘部件500。
其中，在第二实施例的燃烧器1000中，外环引射管205的一次混合气体的流通路径：外环引射管205的一次混合气体从外环引射管出气口2051进入外环分配气道2031，进入外环分配气道2031的一次混合气体流向外环分配气道2031的左右两侧的通道中并向上通过分气盘300的多个一次混合气过孔302均匀进入火盖100的外环腔1033中。进入外环腔1033的部分一次混合气体经过外火盖103的火孔104排出并进行燃烧，进入外环腔1033的另一部分一次混合气体可依次进入连接辐条101的辐条腔1013和内火盖102的中环腔1025并经过连接辐条101和内火盖外周壁1022上的火孔104排出并进行燃烧。
内环引射管204的一次混合气体的流通路径：内环引射管204的一次混合气体流向内环分配气道2011并向上进入内火盖102的内环腔1024，进入内环腔1024的一次混合气体经过内火盖内周壁1021上的火孔104排出并进行燃烧。
通过对比第一实施例的燃烧器1000和第二实施例的燃烧器1000可知，第二实施例的燃烧器1000的炉头200与第一实施例的燃烧器1000的炉头200的区别仅在于增加了气道盖体208对中环分配气道2021的上部敞口进行封堵，即厂家可该将设有三个分配气道的炉头200通用在不同型号的产品中，增加了该三个分配气道的炉头200的通用性和性能可拓展性。例如不增加设有气道盖体208的三个分配气道的炉头200可适当增大外环引射管205的燃气喷嘴以提供一款更高热负荷的燃烧器；或者，增加设有气道盖体208的三个分配气道的炉头200可对中环分配气道2021的上部敞口进行封盖以能提供另一款的热负荷适中的燃烧器，此时可适当减小外环引射管205的燃气喷嘴。
可选地，气道盖体208与内环座201之间和/或气道盖体208与外环座203之间可设有密封结构，从而可防止一次混合气体从气道盖体208与炉头200之间的缝隙外漏。即气道盖体208与内环座201之间可设有密封结构；或者，气道盖体208与外环座203之间可设有密封结构；或者，气道盖体208与内环座201之间可设有密封结构且气道盖体208与外环座203之间可设有密封结构。密封结构可多种多样，例如为插接槽密封结构、旋合密封结构等，本申请不限于此。
可选地，内环座201可包括限定出内环分配气道2011的内环座内周壁2012和内环座外周壁2013，密封结构为插接槽密封结构并包括第一环状插接槽2083和插接在第一环状插接槽2083中的第一环状插接壁2084，第一环状插接槽2083和第一环状插接壁2084中的一者形成在内环座内周壁2012和内环座外周壁2013上，第一环状插接槽2083和第一环状插接壁2084中的另一者形成在气道盖体208的底面上。该密封结构合理简单，便于制造，有利于降低制造成本。如图21所示，气道盖体208与内环座201之间形成有插接槽密封结构，气道盖体208的底面向下延伸形成两个第一环状插接壁2084，内环座内周壁2012的外侧顶端和内环座外周壁2013的内侧顶端向下凹陷以分别形成有第一环状插接槽2083，气道盖体208两个第一环状插接壁2084对应与两个第一环状插接槽2083对插接，从而可防止一次混合气体从气道盖体208与内环座201之间的缝隙外漏。
可选地，中环座202可包括限定出中环分配气道2021的中环座内周壁和中环座外周壁2023，密封结构为插接槽密封结构并包括第二环状插接槽2085和插接在第二环状插接槽2085中的第二环状插接壁2086，第二环状插接槽2085和第二环状插接壁2086中的一者形成在中环座外周壁2023上，第二环状插接槽2085和第二环状插接壁2086中的另一者形成在气道盖体208的外周部上。该 密封结构合理简单，便于制造，有利于降低制造成本。如图21所示，气道盖体208的外周部可向外延伸以形成为第二环状插接壁2086，中环座外周壁2023的内侧顶端向下凹陷以分别形成有第二环状插接槽2085，气道盖体208的第二环状插接壁2086对应与中环座外周壁2023的第二环状插接壁2086对插接，从而可防止一次混合气体从气道盖体208与中环座202之间的缝隙外漏。
第三实施例的燃烧器1000：
如图23至图25所示，在第三实施例的燃烧器1000中，第三实施例的燃烧器1000中的火盖100与第二实施例的燃烧器1000中的火盖100结构一样，均在第一实施例的燃烧器1000中的火盖100的基础上增加了设有内环气道进气口10261的内火盖底壁1026，内火盖底壁1026封盖中环腔1025的下部敞口。如此，该火盖100可配合在仅设有外环分配气道2031和内环分配气道2011两个分配气道的炉头200上使用，以形成三环火焰。该炉头200包括内环引射管204、外环引射管205、内环座201以及外环座203。内环座201内设内环分配气道2011，内环分配气道2011与内环引射管204连通，外环座203套设于内环座201外并内设外环分配气道2031，外环分配气道2031与外环引射管205连通。
具体地，如图23至图25所示，第三实施例的燃烧器1000可包括从下往上布置的炉头200、分气盘300以及火盖100。第三实施例的燃烧器1000的火盖100包括外环腔1033、辐条腔1013、中环腔1025以及内环腔1024，外环腔1033、辐条腔1013以及中环腔1025依次连通。火盖100的外火盖103盖设于分气盘300上，外火盖103的外环腔1033与多个一次混合气过孔302连通。炉头200仅设有内环分配气道2011和外环分配气道2031，内环分配气道2011设于内环座201中并与内环引射管204连通，外环分配气道2031设于外环座203中并与外环引射管205连通。分气盘300设于外环座203上且盖设外环分配气道2031的上部敞口，多个一次混合气过孔302与外环分配气道2031连通。火盖100的内火盖102连接于炉头200的内环座201上且内环腔1024的下部敞口与炉头200的内环分配气道2011连通。
其中，在第三实施例的燃烧器1000中，由于炉头200没有相应的分配气道与内火盖102的中环腔1025进行连通，故如图25所示，内火盖102还包括封盖中环腔1025的下部敞口的内火盖底壁1026，如此，可避免中环腔1025的一次混合气体从中环腔1025的下部敞口泄露。
另外，为了使得燃烧器1000的小火能做得更小，可将内引射管204的燃气喷嘴尽量做小，供气量减小。此时，为了使得供给内火盖102的内环腔1024的一次混合气体更加均匀稳定，燃烧率更好，如图28所示，内火盖102的内火盖底壁1026还封盖内环腔1024的环状下部敞口，并且，内火盖底壁1026还设有与内环腔1024连通的且进气横截面积相对减小的内环气道进气口10261，相应地，炉头200的内环座201上可设有内环分配气道盖板，该内环分配气道盖板上设有贯通的气道出气口，在内火盖102连接于炉头200的内环座201上的同时，气道出气口与内环气道进气口10261连通以向内环腔1024供气。
此外，如图25所示，气道出气口的口沿部可从内环分配气道盖板向上伸出以形成盖板插接凸起部，内环气道进气口10261的口沿部可从内火盖底壁1026向下伸出以形成围绕内环气道进气口10261的插接槽部，如此，内环分配气道盖板的插接凸起部可通过插接在内火盖底壁1026的插接槽部中以形成限位安装结构，增强火盖100与炉头200的连接可靠性；并且，此时可省却内火盖102与内环座201之间的内分气盘部件。
可选地，如图25所示，外环引射管205的接口部位于外环座203的底部且外环引射管205沿切线方向连通外环分配气道2031，内环引射管204的接口部位于内环座201的底部且内环引射管204沿切线方向连通内环分配气道2011，外环引射管205与内环引射管204平行间隔设置。外环座203的外环座底壁2034和内环座201的内环座底壁2015的顶面均形成为沿气流方向的倾斜爬坡面，有利于减少一次混合气的流阻，出气更流畅，火焰燃烧的稳定性更好。
其中，在第三实施例的燃烧器1000中，外环引射管205的一次混合气体的流通路径为：外环引射管205中的一次混合气体从外环引射管出气口2051进入外环分配气道2031，进入外环分配气道2031的一次混合气体通过分气盘300的多个一次混合气过孔302均匀进入火盖100的外环腔1033中。进入外环腔1033的部分一次混合气体经过外火盖103的火孔104排出并进行燃烧，进入外环腔1033的另一部分一次混合气体可依次进入连接辐条101的辐条腔1013和内火盖102的中环腔1025并经过连接辐条101和内火盖外周壁1022上的火孔104排出并进行燃烧。
内环引射管204的一次混合气体的流通路径：内环引射管204中的一次混合气体从内环引射管出气口进入内环分配气道2011，进入内环分配气道2011的一次混合气体依次通过内环分配气道盖板的气道出气口、内火盖底壁1026的内环气道进气口10261流向内火盖102的内环腔1024，进入 内环腔1024的一次混合气体经过内火盖内周壁1021上的火孔104排出并进行燃烧。
需要说明的是，本申请的燃烧器1000的火盖100可适配多种不同的炉头进行使用，即本申请的燃烧器1000的炉头200除了为上述三种实施例的炉头外，还可为三个引射管对应向三个分配气道供气的炉头等，本申请不限于此。
进一步地，本申请的发明人经过不断的研究和试验发现，现有的分气盘难以满足高热负荷和高燃烧效率要求的燃烧器。这是由于提高了燃气灶的热负荷后，由于二次空气补充不足，会引起燃烧状况恶化致使热效率下降和烟气排放不达标。而二次空气补充不足的原因主要有两个，一个是二次空气的补充总量不足，导致空气总量与燃气总量的比例异常，由于缺氧而引起燃烧状况恶化致使热效率下降和烟气排放不达标；另一个是由于二次空气与燃气的混合不均匀或未能充分混合，导致空气二燃气的混合比例异常，从而也会造成燃烧状况恶化致使热效率下降和烟气排放不达标。
具体地，由于现有的分气盘的二次空气孔的数量较少，且相应地，二次空气孔的孔流通面积比较大，二次空气经过二次空气孔进入燃烧区域后回向孔的两边扩散，并形成较大的涡流区，这会导致二次空气的进气阻力增大，影响进气量；并且，在进气后，会导致一次混合气体和二次空气的分布不均匀而影响混合比例，从而会造成燃烧状况恶化致使热效率下降和烟气排放不达标的情况。
有鉴于此，本申请的发明人提供了一种新型的分气盘300，该分气盘300呈环状并包括环状盘周壁301、多个一次混合气过孔302和多个二次空气孔303，多个一次混合气过孔302沿周向间隔布置并沿轴向贯穿地形成在环状盘周壁301上，多个二次空气孔303沿周向间隔布置并沿径向贯穿地形成在环状盘周壁301上，二次空气孔303的数量大于等于10个。如此，二次空气孔303的数量多，相应地，单个二次空气孔303的孔流通面积减少，二次空气形成的涡流效果也较小，进气流线比较均匀，进气阻力减少，流阻小，进气量就会更多进而有利于提高燃烧器的热效率和热负荷。
其中，分气盘300可呈圆环状、矩形环状或其他形状环状等，与燃烧器1000的炉头200和火盖100匹配即可。二次空气孔303的数量大于等于10个，可例如为10个、12个、15个或者更多个等。二次空气孔303和一次混合气过孔302的形状也可多种多样，例如为圆孔、跑道孔或其他形状孔等，本申请不限于此。
可选地，二次空气孔303的数量大于等于16个。如图6和图7所示，分气盘300呈圆环状，二次空气孔303的数量为20个。二次空气孔303的数量越多，相应地，单个二次空气孔303的孔流通面积越少，二次空气的分布会更加均匀，二次空气形成的涡流效果也更小，进气流线更均匀，进气阻力和流阻更小。
可选地，当二次空气孔303垂直于自身轴向的横截面的面积小于等于120mm 2时，二次空气的分布会较为均匀，形成的涡流效果也较小，进气流线较均匀，进气阻力和流阻较小，进气量增大，进而有利于提高燃烧效率；并且，二次空气孔303垂直于自身轴向的横截面的面积可设置大于等于50mm 2，如此，可保证二次空气孔303足够的进气量以及进气的流畅性。
可选地，如图6和图7所示，二次空气孔303可为圆孔，即二次空气孔303垂直于自身轴向的横截面形状可为圆形，如此，可使得分气盘300更便于加工，降低加工难度。或者，二次空气孔303可为腰形孔(图中未示出)且腰形孔的平行腰边沿分气盘300的轴向布置，即二次空气孔303垂直于自身轴向的横截面形状可为腰形。当二次空气孔303垂直于自身轴向的横截面的面积一定，若增大腰形孔的轴向尺寸，相应地，则腰形孔的周向尺寸变小，这样，可沿周向间隔地设置更多的二次空气孔303，进一步减弱进气的涡流效果和提高二次空气的进气总量，进而可提高燃烧效率。
可选地，环状盘周壁301的外侧面向上延伸以形成顶端环形周壁3011，顶端环形周壁3011用于与外火盖100固定安装。如图6所示，顶端环形周壁3011的顶沿形成有环状承台部以与火盖100限位安装。
在一些实施例中，一次混合气过孔302的数量可大于等于10个，二次空气孔303与一次混合气过孔30沿周向依次交替分布。如此，一次混合气过孔302的数量多，相应地，单个一次混合气过孔302的孔流通面积减少，一次混合气过孔302形成的涡流效果也较小，进气流线比较均匀，进气阻力减少，流阻小，进气量就会更多进而有利于提高燃烧器的热负荷。更重要的是，二次空气孔303与一次混合气过孔30沿周向依次交替分布，二次空气和一次混合气体的分布会更加均匀，燃烧效率更好。其中，一次混合气过孔302的数量大于等于10个，可例如为10个、12个、15个或者更多个等。如图6和图7所示，一次混合气过孔302和二次空气孔303的数量均为20个且依次交替分布。一次混合气过孔302的数量越多，相应地，单个一次混合气过孔302的孔流通面积越少，一次混合气体的分布会更加均匀，形成的涡流效果也更小，进气流线更均匀，进气阻力和流阻更小。
可选地，当一次混合气过孔302垂直于自身轴向的横截面的面积小于等于120mm 2时，一次混 合气体的分布会较为均匀，形成的涡流效果也较小，进气流线较均匀，进气阻力和流阻较小，进气量增大，进而有利于提高热效率和热负荷；并且，一次混合气过孔302垂直于自身轴向的横截面的面积设置大于等于60mm 2，如此，可保证一次混合气过孔302足够的进气量以及进气的流畅性。
可选地，一次混合气过孔302的混合气过孔径向外端部3021的孔宽大于一次混合气过孔302的混合气过孔径向内端部3022的孔宽。如图6和图7所示，一次混合气过孔302呈一头大一个小的腰型孔状。如此，一次混合气过孔302与环状盘周壁301的环壁形状匹配，可尽可能地增大多个一次混合气过孔302的总进气面积，提高一次混合气体的进气总量，进而可提高热负荷。其中，定义相对靠近分气盘300的中心的位置为“内”，相对远离分气盘300的中心的位置为“外”。一次混合气体为燃气和一次空气的混合气体。
在另一些实施例中，如图16和图17所示，多个二次空气孔303可沿周向均匀分组以形成沿周向间隔布置且至少包括两个二次空气孔303的多个二次空气孔组，二次空气孔组与一次混合气过孔302沿周向依次交替分布。其中，多个二次空气孔303可均匀分为2组、3组、4组、5组或更多组；均匀分组可为等数量分组或近似数量的分组，即每个二次空气孔组中的二次空气孔303的数量可均相同，或者，多个二次空气孔组中的二次空气孔303的数量可相差不多，例如相差一个或两个等。每个二次空气孔组中的二次空气孔303的数量可为2个、3个、4个、5个或者更多个。如图16和图17所示，分气盘300设有16个二次空气孔303，16个二次空气孔303沿周向均匀分组以形成沿周向间隔布置且包括4个二次空气孔303的4个二次空气孔组。相较于如图6和图7所示的实施例的分气盘300，本实施例的分气盘300的一次混合气过孔的数量减少了，这样更便于分气盘300的加工，更好地兼顾了分气盘300的优化性能和生产成本之间的平衡。
进一步地，为了能有效提高燃烧器1000的热效率，本申请的燃烧器1000还包括套设于火盖100和分气盘300外的锅支架400。如图26和图29所示，该锅支架400包括呈环状的聚能盘401、支架部以及多个回热翅片403。支架部设置在聚能盘上并用于顶撑锅具，呈环状的聚能盘401可将高温火焰与外部环境隔开，减少外界低温气流对火焰的影响以及燃烧热量的损失，同时能让热气体在炊具底部的热交换面停留更长时间，提高换热效率，从而提高燃烧器的整体热效率。由于锅支架400与面板之间形成有燃烧区域的进气通道，多个回热翅片403设置在聚能盘401的盘底面上并沿周向间隔布置，任意两个回热翅片403之间形成有二次空气回热通道406，二次空气通过二次空气回热通道406时能够被回热翅片加热，从而实现对二次空气进行预热，进而将回热翅片上的热量带回至燃烧区域中以提高系统热效率。
具体地，如图26和图27所示，聚能盘401呈圆环形罩体状且中心部设有圆形的中心燃烧过孔；聚能盘401也可呈矩形环罩体状或其他形状，中心燃烧过孔也可为方形孔或其他不规则形状孔；多个回热翅片403的形状也可多种多样，数量也可根据实际应用需要进行设置；聚能盘401可为单层、两层、三层或更多层的隔热结构，本申请不限于此。
可选地，回热翅片403可呈平面片状或弯曲片状。如图27所示，多个回热翅片403可呈平面片状并均沿径向延伸，如此，二次空气的流阻较小，可快速顺畅地通过二次空气回热通道406进入至燃烧区域。或者，多个回热翅片403可呈平面片状并倾斜于径向设置，倾斜设置的多个回热翅片403可呈漩涡状布置；或者，多个回热翅片403可均呈弯曲片状并呈漩涡状布置，多个回热翅片403呈漩涡状布置不仅可增长二次空气的进气路径和增加回热翅片403与二次空气的换热面积，提高换热效率，还可使得被卷吸进来的二次空气形成回旋涡流，回旋涡流使燃气和二次空气有效地混合，燃气因此能得到充分燃烧，大大提升了燃烧率。
可选地，如图26所示，支架部包括多个支架脚402，多个支架脚402设置在聚能盘401的盘顶面上并沿周向间隔布置。支架脚402的顶沿可与水平面平行，如此，可增加与锅具底面的接触面积，防止支架脚402与锅具之间发生移动打滑，使得锅具能更稳固地支撑在支架脚402上，更加安全可靠。当然，支架部除了为上述的多个支架脚402外，还可例如为一个连接在聚能盘上的圆柱形框架或其他形状的支架；聚能盘401的盘顶面上除了沿周向间隔设置有四个支架脚402、支架脚402呈平板状外，支架脚402的数量也可为三个、五个或更多个等，支架脚402的形状也可多种多样，例如为V形板、工形板或其他不规则形状等。
进一步地，任意相邻的两个回热翅片403之间可连接有中间加强翅片404，如此，既可以增加翅片与二次空气的换热面积，进一步提高换热效率，还能在每个二次空气回热通道406中增加对二次空气的扰流效果，使得二次空气能更充分地与翅片进行换热。其中，中间加强翅片404的形状和布置方式可多种多样，例如中间加强翅片404可为S形翅片或其他形状翅片等，任意相邻的两个回热翅片403之间可连接有一个中间加强翅片404，也可连接有两个、三个或更多个中间加强翅片404 等。
可选地，如图29所示，中间加强翅片404可呈T字形并包括翼板片4041和腹板片4042。翼板片4041沿水平方向布置且两端分别与相邻的回热翅片403连接，腹板片4042沿竖直平面布置且向下延伸。如此，可大大增加每个二次空气回热通道406与二次空气的换热面积。并且中间加强翅片404可将二次空气回热通道406分隔成更小的通道，以进一步提高对二次空气的扰流效果。可选地，腹板片4042的竖直长度比回热翅片403的竖直长度短，腹板片4042的底沿高度可高于回热翅片403的底沿高度，可避免二次空气回热通道406被中间加强翅片404分隔出的通道过小而影响二次空气的吸入量。
由于在烹饪过程中，聚能盘401也会被加热并向外辐射热量，从而造成热量的散失。为了使得燃烧器燃烧产生的热量尽量用于加热锅具，避免热量从聚能盘401上向外散失，在一些实施例中，如图29所示，聚能盘401可包括同心且上下布置的第一聚能盘4011和第二聚能盘4012，第一聚能盘4011的盘底面与第二聚能盘4012的盘顶面共同限定出隔热腔407，多个支架脚402设置在第一聚能盘4011的盘顶面上，多个回热翅片403设置在第二聚能盘4012的盘底面上。如此，通过第一聚能盘4011和第二聚能盘4012之间的隔热腔407可减少燃烧区域的热量从聚能盘401上向外散失，更进一步地提高燃烧器的整体热效率，且更加节能环保。
在一些实施例中，第一聚能盘4011的环状盘壁形成有环状下凹槽40111，如图28所示，第一聚能盘4011包括第一聚能盘内环沿、第一聚能盘外环沿以及连接在第一聚能盘内环沿和第一聚能盘外环沿之间的环状盘壁，环状盘壁形成有下凹的环状下凹槽40111，环状下凹槽40111的槽底分别低于第一聚能盘内环沿和第一聚能盘外环沿。环状下凹槽40111的下凹形状可与火焰的外焰轮廓形状适配，如此，可使得火焰与环状下凹槽40111之间留有适当的间隙，保证火焰有足够的燃烧空间，避免因火烧盘壁而产生过多的不良物质的排放。此外，环状下凹槽40111还可用于容置从锅具外溢的液体，避免液体流至火孔处堵塞火孔。
可选地，第一聚能盘4011的环状盘壁可包括多个沿周向依次邻接且旋向一致的旋叶状曲面，如此，旋叶状曲面可使得被卷吸进来的二次空气形成局部气压差。由于气压差的存在，二次空气从高压区流向低压区，形成小型的气体环流，从而形成二次空气的回旋涡流。回旋涡流使燃气和二次空气有效地混合，燃气因此能得到充分燃烧，大大提升了燃烧率。
可选地，如图28和图29所示，第二聚能盘4012包括第二聚能盘内环沿、第二聚能盘外环沿以及连接在第二聚能盘内环沿和第二聚能盘外环沿之间的环状盘壁，第二聚能盘内环沿和第二聚能盘外环沿均向上延伸，第二聚能盘4012的环状盘壁向下凹形成第二聚能盘下凹槽。第一聚能盘内环沿向内延伸形成有内环翻边和第一聚能盘外环沿向外延伸形成有外环翻边，内环翻边和外环翻边分别对应顶撑于第二聚能盘内环沿和第二聚能盘外环沿并形成固定连接。第二聚能盘4012的环状盘壁可包括光滑过渡连接的环状盘底壁和环状盘侧壁，环状盘侧壁的斜率可大于1，如此，可尽量增大第二聚能盘下凹槽的尺寸，进而使得隔热腔407的体积更大，隔热效果更好。其中，隔热腔407可为真空腔或空气腔。
可选地，第二聚能盘4012的盘底面向下伸出有多个支撑底脚405，多个支撑底脚405沿周向间隔布置。如图28所示，支撑底脚405的竖向长度比回热翅片403的竖向长度大，回热翅片403的底沿高度高于支撑底脚405的底沿高度，如此，可避免回热翅片403与下部支撑部件接触，从而避免将回热翅片403的热量传递至下部支撑部件而散热过多。其中，多个支撑底脚405可为独立设置的支撑底脚，也可由部分回热翅片403向下延伸形成，本申请不限于此。
可选地，第一聚能盘4011上可设有耐高温、低透射率、高吸收率或高发射率的涂层材料，例如涂层材料的发射率可大于0.5，优选为0.7～1；第一聚能盘4011可采用耐高温、低透射率、低吸收率或低发射率、高反射率的材料，例如第一聚能盘4011的发射率可小于0.5，优选为0～0.4。如此，使燃烧过程中产生的各种不同波段的辐射高效地被涂层材料吸收并转换为有效的红外热辐射，同时由于基底102的材料相反特性，有效地阻隔了第一聚能盘4011向非炊具方向的红外热辐射，因此能大幅提高热辐射的利用效率，即可有效吸收燃烧火焰的热能并减少热量损失。例如第一聚能盘4011的材质可为发射率低的不锈钢，涂层材料可为黑色耐高温漆。
此外，本申请还提出一种燃气灶，该燃气灶包括上述的燃烧器。同样地，该燃烧器的具体结构参照上述实施例，由于本申请的燃气灶采用了上述所有实施例的全部技术方案，因此至少具有上述实施例的技术方案所带来的所有有益效果，在此不再一一赘述。
综上可见，本申请提供了一种综合性能好的火盖100、燃烧器1000和燃气灶，该火盖100、燃烧器1000和燃气灶的燃烧率高、热负荷高、匀火性好、点火速度快以及点火稳定性好。
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本发明的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本发明中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接或彼此可通讯；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
在本发明中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。
尽管上面已经示出和描述了本发明的实施例，可以理解的是，上述实施例是示例性的，不能理解为对本发明的限制，本领域的普通技术人员在本发明的范围内可以对上述实施例进行变化、修改、替换和变型。

Claims (41)

  1. 一种火盖，其特征在于，所述火盖(100)包括：
    多个子火盖，均呈环状且径向间隔套装；和
    多个连接辐条(101)，任意相邻的两个所述子火盖之间或部分相邻的两个所述子火盖之间通过多个沿周向间隔布置的所述连接辐条(101)连接；
    其中，所述子火盖和所述连接辐条(101)上均设有多个火孔(104)。
  2. 根据权利要求1所述的火盖，其特征在于，多个所述子火盖为两个并包括：
    外火盖(103)；和
    内火盖(102)，套装于所述外火盖(103)中；
    其中，多个所述连接辐条(101)沿周向间隔布置并分别连接所述外火盖(103)和所述内火盖(102)。
  3. 根据权利要求2所述的火盖，其特征在于，所述外火盖(103)包括外火盖外周壁(1032)和倾斜朝上且朝内设置的外火盖内周壁(1031)，所述内火盖(102)包括倾斜朝上且朝内设置的内火盖内周壁(1021)和倾斜朝上且朝外设置的内火盖外周壁(1022)，所述外火盖内周壁(1031)、所述内火盖内周壁(1021)以及所述内火盖外周壁(1022)上均设有多个沿周向间隔布置的所述火孔(104)。
  4. 根据权利要求3所述的火盖，其特征在于，所述外火盖内周壁(1031)与水平面之间的锐角夹角大于所述内火盖内周壁(1021)与水平面之间的锐角夹角。
  5. 根据权利要求3所述的火盖，其特征在于，所述外火盖内周壁(1031)上的多个所述火孔(104)沿周向间隔布置且沿高度方向间隔布置以形成多个外环火孔圈；和/或，所述内火盖外周壁(1022)上的多个所述火孔(104)沿周向间隔布置且沿高度方向间隔布置以形成多个内环外火孔圈；和/或，所述内火盖内周壁(1021)上的多个所述火孔(104)沿周向布置且沿高度方向间隔布置以形成多个内环内火孔圈。
  6. 根据权利要求2所述的火盖，其特征在于，所述内火盖(102)的顶沿高度低于所述外火盖(103)的顶沿高度。
  7. 根据权利要求6所述的火盖，其特征在于，所述内火盖(102)的顶沿高度低于或等于所述外火盖内周壁(1031)的底沿高度，所述外火盖(103)上的所述火孔(104)、所述连接辐条(101)上的所述火孔(104)以及所述内火盖(102)上的所述火孔(104)的高度依次递减。
  8. 根据权利要求2所述的火盖，其特征在于，所述连接辐条(101)呈中空筒状且所述连接辐条(101)的筒腔为辐条腔(1013)，所述连接辐条(101)的两个筒端分别与所述外火盖(103)和所述内火盖(102)连接。
  9. 根据权利要求8所述的火盖，其特征在于，所述连接辐条(101)包括限定出所述辐条腔(1013)的辐条顶壁、辐条底壁以及连接在所述辐条顶壁和所述辐条底壁之间的两个辐条侧壁，两个所述辐条侧壁沿周向间隔布置且两个所述辐条侧壁与所述辐条顶壁的连接位置分别形成有倾斜朝上的倾斜壁部，两个所述倾斜壁部上间隔设有多个火孔(104)。
  10. 根据权利要求9所述的火盖，其特征在于，两个所述倾斜壁部包括沿顺时针朝向前布置的前侧倾斜壁部(1011)和沿顺时针朝向后布置的后侧倾斜壁部(1012)，多个所述连接辐条(101)的所述前侧倾斜壁部(1011)或多个所述连接辐条(101)的所述后侧倾斜壁部(1012)形成为弯折壁。
  11. 根据权利要求2所述的火盖，其特征在于，任意相邻的两个所述连接辐条(101)和对应相邻的两个所述子火盖之间形成有轴向贯通的二次空气通道(105)。
  12. 根据权利要求11所述的火盖，其特征在于，所述连接辐条(101)沿所述火盖(100)的径向延伸且所述连接辐条(101)垂直于所述径向的横截面的面积由外至内逐渐递减。
  13. 根据权利要求2至12中任意一项所述的火盖，其特征在于，所述内火盖(102)的内火盖外周壁(1022)和所述内火盖(102)的内火盖内周壁(1021)之间设有环状的分隔腔壁(1023)以将所述内火盖(102)的环腔分隔成中环腔(1025)和内环腔(1024)，所述内火盖外周壁(1022)和所述分隔腔壁(1023)共同限定出所述中环腔(1025)，所述内火盖内周壁(1021)和所述分隔腔壁(1023)共同限定出所述内环腔(1024)。
  14. 根据权利要求13所述的火盖，其特征在于，所述外火盖(103)内设外环腔(1033)，所述外环腔(1033)与所述连接辐条(101)的辐条腔(1013)连通。
  15. 根据权利要求14所述的火盖，其特征在于，所述外环腔(1033)、所述辐条腔(1013)以及所述中环腔(1025)依次连通。
  16. 根据权利要求15所述的火盖，其特征在于，所述内火盖(102)还包括封盖所述中环腔(1025)的下部敞口的内火盖底壁(1026)。
  17. 一种燃烧器，其特征在于，所述燃烧器包括：
    根据权利要求15或16任意一项所述的火盖(100)；和
    炉头(200)，设于所述火盖(100)的下方并内设外环分配气道(2031)和内环分配气道(2011)，所述内环分配气道(2011)与所述内环腔(1024)连通，所述外环分配气道(2031)与所述外环腔(1033)连通。
  18. 根据权利要求17所述的燃烧器，其特征在于，所述炉头(200)还包括外环引射管(205)、内环引射管(204)、内环座(201)、中环座(202)以及外环座(203)，所述内环座(201)、中环座(202)以及外环座(203)从内至外依次套装并对应设有所述内环分配气道(2011)、中环分配气道(2021)以及所述外环分配气道(2031)，所述中环分配气道(2021)通过中外环连通通道(206)与所述外环分配气道(2031)连通，所述外环引射管(205)、所述外环分配气道(2031)、所述中外环连通通道(206)以及所述中环分配气道(2021)依次连通，所述内环引射管(204)与所述内环分配气道(2011)连通。
  19. 根据权利要求18所述的燃烧器，其特征在于，所述中环分配气道(2021)与所述中环腔(1025)连通；或者，
    所述炉头(200)还包括可拆卸地设于所述中环座(202)上并封盖所述中环分配气道(2021)的上部敞口的内环气道盖体(208)。
  20. 根据权利要求19所述的燃烧器，其特征在于，所述中环座(202)包括限定出所述中环分配气道(2021)的中环座内周壁(2022)和中环座外周壁(2023)，所述外环座(203)包括限定出所述外环分配气道(2031)的外环座内周壁(2032)和外环座外周壁(2033)，所述中外环连通通道(206)沿径向延伸并连接于所述中环座外周壁(2023)与所述外环座内周壁(2032)之间。
  21. 根据权利要求20所述的燃烧器，其特征在于，所述外环引射管(205)的外环引射管出气口(2051)设置在所述外环座外周壁(2033)上，所述中外环连通通道(206)与所述外环引射管(205)均呈直管状并沿同一径向向外延伸，所述中外环连通通道(206)位于所述外环座内周壁(2032)上的连通通道进气口(2061)正对所述外环引射管出气口(2051)且所述连通通道进气口(2061)的面积小于所述外环引射管出气口(2051)的面积。
  22. 根据权利要求20所述的燃烧器，其特征在于，所述外环引射管(205)和所述内环引射管(204)沿径向延伸且沿周向间隔布置。
  23. 根据权利要求22所述的燃烧器，其特征在于，所述内环引射管(204)的管长小于所述 外环引射管(205)的管长；和/或，所述内环引射管(204)位于所述外环座外周壁(2033)外的管长不长于15cm。
  24. 根据权利要求20所述的燃烧器，其特征在于，所述中环座外周壁(2023)的顶端周缘部与所述外环座内周壁(2032)的顶端周缘部之间设有连接顶壁(207)，所述连接顶壁(207)设有轴向贯通的顶壁通气口。
  25. 根据权利要求18所述的燃烧器，其特征在于，所述内环座(201)包括限定出所述内环分配气道(2011)的内环座内周壁(2012)和内环座外周壁(2013)，所述中环座(202)包括限定出所述中环分配气道的中环座内周壁和中环座外周壁(2023)，所述内环座外周壁(2013)和所述中环座内周壁形成为共用的中内环共用周壁。
  26. 根据权利要求25所述的燃烧器，其特征在于，所述内环座内周壁(2012)环绕形成有轴向贯通的中心通气口。
  27. 根据权利要求17所述的燃烧器，其特征在于，所述炉头(200)还包括外环引射管(205)、内环引射管(204)、外环座(203)以及内环座(202)，所述外环座(203)内设所述外环分配气道(2031)，所述内环座(202)内设所述内环分配气道(2011)，所述外环引射管(205)与所述外环分配气道(2031)连通，所述内环引射管(204)与所述内环分配气道(2011)连通。
  28. 根据权利要求27所述的燃烧器，其特征在于，所述外环引射管(205)的接口部位于所述外环座(203)的底部且所述外环引射管(205)沿切线方向连通所述外环分配气道(2031)，所述内环引射管(204)的接口部位于所述内环座(201)的底部且所述内环引射管(204)沿切线方向连通所述内环分配气道(2011)，所述外环引射管(205)与所述内环引射管(204)平行间隔设置。
  29. 根据权利要求17至28中任意一项所述的燃烧器，其特征在于，所述燃烧器(1000)还包括：
    分气盘(300)，设于所述外火盖(103)与所述外环座(203)之间并分别封盖所述外火盖(103)的外环腔(1033)和所述外环座(203)的外环分配气道(2031)，所述分气盘(300)包括环状盘周壁(301)，所述环状盘周壁(301)上设有沿周向间隔布置且沿轴向贯穿的多个一次混合气过孔(302)和沿周向间隔布置且沿径向贯穿的多个二次空气孔(303)，所述外火盖(103)的外环腔(1033)通过多个所述一次混合气过孔(302)与所述外环座(203)的外环分配气道(2031)连通。
  30. 根据权利要求29所述的燃烧器，其特征在于，所述二次空气孔(303)的数量大于等于10个。
  31. 根据权利要求30所述的燃烧器，其特征在于，所述二次空气孔(303)垂直于自身轴向的横截面面积大于等于50mm 2且小于等于120mm 2。
  32. 根据权利要求30所述的燃烧器，其特征在于，所述一次混合气过孔(302)的数量大于等于10个，所述二次空气孔(303)与所述一次混合气过孔(302)沿周向依次交替分布；或者，多个二次空气孔(303)沿周向均匀分组以形成多个沿周向间隔布置且至少包括两个所述二次空气孔(303)的二次空气孔组，所述二次空气孔组与所述一次混合气过孔(302)沿周向依次交替分布。
  33. 根据权利要求30所述的燃烧器，其特征在于，所述二次空气孔(303)为圆孔；或者，所述二次空气孔(303)为腰形孔且所述腰形孔的平行腰边沿所述分气盘(300)的轴向布置。
  34. 根据权利要求29所述的燃烧器，其特征在于，所述燃烧器还包括套设于所述火盖(100)和所述分气盘(300)外的锅支架(400)，所述锅支架(400)包括：
    聚能盘(401)，呈环状；
    支架部，设置在所述聚能盘(401)上并用于顶撑锅具；以及
    多个回热翅片(403)，设置在所述聚能盘(401)的盘底面上并沿所述周向间隔布置，任意两 个所述回热翅片(403)之间形成有二次空气回热通道(406)。
  35. 根据权利要求34所述的燃烧器，其特征在于，任意相邻的两个所述回热翅片(403)之间连接有中间加强翅片(404)。
  36. 根据权利要求35所述的燃烧器，其特征在于，所述中间加强翅片(404)呈T字形并包括翼板片(4041)和腹板片(4042)，所述翼板片(4041)的两端分别与相邻的所述回热翅片(403)连接，所述腹板片(4042)向下延伸且底沿高度高于所述回热翅片(403)的底沿高度。
  37. 根据权利要求34所述的燃烧器，其特征在于，多个所述回热翅片(403)呈平面片状并均沿径向延伸；或者，多个所述回热翅片(403)均呈弯曲片状并呈漩涡状布置。
  38. 根据权利要求34所述的燃烧器，其特征在于，所述支架部包括多个支架脚(402)，多个所述支架脚(402)设置在所述聚能盘(401)的盘顶面上并沿周向间隔布置。
  39. 根据权利要求34所述的燃烧器，其特征在于，所述聚能盘(401)包括同心且上下布置的第一聚能盘(4011)和第二聚能盘(4012)，所述第一聚能盘(4011)的盘底面与所述第二聚能盘(4012)的盘顶面共同限定出隔热腔(407)，多个所述支架脚(402)设置在所述第一聚能盘(4011)的盘顶面上，多个所述回热翅片(403)设置在所述第二聚能盘(4012)的盘底面上。
  40. 根据权利要求39所述的燃烧器，其特征在于，所述第一聚能盘(4011)的环状盘壁形成有环状下凹槽(40111)；或者，所述第二聚能盘(4012)的盘底面向下伸出有多个支撑底脚(405)。
  41. 一种燃烧灶，其特征在于，所述燃烧灶包括根据权利要求17至40任意一项所述的燃烧器。
PCT/CN2021/078903 2021-01-20 2021-03-03 火盖、燃烧器和燃气灶 WO2022156046A1 (zh)

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