CN216114031U - Furnace end, combustor and cooking utensils - Google Patents

Abstract

The utility model provides a furnace end, a combustor and a stove, and relates to the technical field of combustion equipment, wherein the furnace end comprises a furnace end body, the furnace end body comprises a first annular wall and a second annular wall which are sequentially sleeved from inside to outside, the first annular wall is connected with a first bottom wall, and a first distribution air channel is formed between the first bottom wall and the first annular wall above the first bottom wall; the second ring wall is connected with the second diapire, and the second diapire interval sets up in the below of first diapire, and in the top of second diapire, be formed with the second between second diapire and the second ring wall and distribute the gas way. The second bottom wall is arranged below the first bottom wall at intervals, and a gap between the first bottom wall and the second bottom wall is also used as a part of the second distribution air flue and is equivalent to a premixing cavity of gas in the second distribution air flue, so that the gas can be better mixed in the second distribution air flue, and the gas combustion sufficiency of a burner using the burner is improved.

Description

Furnace end, combustor and cooking utensils

Technical Field

The utility model relates to the technical field of combustion equipment, in particular to a furnace end, a combustor and a stove.

Background

Burners are an important component of cookers. The burner generally includes a burner and a fire cover, wherein gas and air are mixed in the burner and then enter a fire outlet of the fire cover, and the mixed gas forms a flame after being ignited.

At present, the structure of the existing upper air inlet burner is complex, the combustion efficiency is low, and the problem that how to improve the combustion sufficiency of gas in a limited space is always a problem to be solved urgently by technical staff.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a furnace end, a combustor and a stove, so as to improve the gas combustion sufficiency of the combustor.

The utility model provides a furnace end, which comprises a furnace end body, wherein the furnace end body comprises a first annular wall and a second annular wall which are sequentially sleeved from inside to outside, the first annular wall is connected with a first bottom wall, and a first distribution air channel is formed between the first bottom wall and the first annular wall above the first bottom wall;

and a second bottom wall is connected with the second annular wall, the second bottom wall is arranged below the first bottom wall at intervals, and a second distribution air flue is formed between the second bottom wall and the second annular wall above the second bottom wall.

Further, the first annular wall comprises a first sub-wall and a second sub-wall which are both annular, the second sub-wall is arranged around the outer side of the first sub-wall at intervals, the first bottom wall is connected between the first sub-wall and the second sub-wall, and the first distribution air channel is formed among the first bottom wall, the first sub-wall and the second sub-wall.

Further, the lower edge of the second sub-wall is located above the lower edge of the first sub-wall, the first bottom wall is connected between the lower edge of the second sub-wall and the first sub-wall, and the second bottom wall is connected between the lower edge of the first sub-wall and the second annular wall.

Further, the first bottom wall is obliquely arranged, and one end of the first bottom wall connected with the first sub-wall is lower than one end of the first sub-wall connected with the second sub-wall.

Furthermore, a first injection pipe is arranged on the first annular wall, the first injection pipe is vertically arranged, and an air outlet of the first injection pipe is communicated with the first distribution air passage.

Further, the first injection pipe is connected between the first annular wall and the second annular wall and integrally formed with the first annular wall and the second annular wall.

Furthermore, the first ejector pipe is arranged on one radial side of the second annular wall, and the height of one side, close to the first ejector pipe, of the second bottom wall is higher than that of one side, far away from the first ejector pipe, of the second bottom wall.

Further, the second bottom wall comprises a semi-ring plane section, a first inclined plane section and a second inclined plane section, the semi-ring plane section is arranged on one side, opposite to the first injection pipe, of the second annular wall, the first inclined plane section is connected between one end of the semi-ring plane section and the bottom surface of the first injection pipe, the second inclined plane section is connected between the other end of the semi-ring plane section and the bottom surface of the first injection pipe, and the first inclined plane section and the second inclined plane section are arranged in a downward inclined mode from one end connected with the first injection pipe to one end connected with the semi-ring plane section.

Furthermore, the first injection pipe is arranged on one radial side of the second annular wall, a second injection pipe is connected to one side, far away from the first injection pipe, of the second annular wall below the first bottom wall, an air outlet of the second injection pipe is communicated with the second distribution air passage, and the second injection pipe is horizontally arranged.

Further, a first baffle and a first annular strip-shaped hole are formed in the top of the first distribution air flue, and a second baffle and a second annular strip-shaped hole are formed in the top of the second distribution air flue;

the first annular strip-shaped hole extends along the circumferential direction of the first distribution air passage, two ends of the first baffle plate respectively correspond to two ends of the first annular strip-shaped hole, a plurality of first air outlet holes are formed in the first baffle plate at intervals along the circumferential direction of the first distribution air passage, and the first baffle plate is arranged right above an air outlet of the first injection pipe;

the second annular strip-shaped hole extends along the circumferential direction of the second distribution air passage, two ends of the second baffle correspond to two ends of the second annular strip-shaped hole respectively, a plurality of second air outlet holes are formed in the second baffle along the circumferential direction of the second distribution air passage at intervals, and the second baffle is arranged right above an air outlet of the second injection pipe.

Further, the furnace end body comprises an inner ring structure and an outer ring structure, the inner ring structure is sleeved in the outer ring structure at intervals, and the inner ring structure is provided with the first ring wall, the second ring wall, the first bottom wall and the second bottom wall.

The burner provided by the utility model comprises the burner provided by the utility model.

The stove provided by the utility model comprises the stove head provided by the utility model or the burner provided by the utility model.

The utility model provides a furnace end, which comprises a furnace end body, wherein the furnace end body comprises a first annular wall and a second annular wall which are sequentially sleeved from inside to outside, the first annular wall is connected with a first bottom wall, and a first distribution air channel is formed between the first bottom wall and the first annular wall above the first bottom wall; the second ring wall is connected with the second diapire, and the second diapire interval sets up in the below of first diapire, and in the top of second diapire, be formed with the second between second diapire and the second ring wall and distribute the gas way. Since the first distribution gas passage is located inside the second distribution gas passage, the required amount of gas in the first distribution gas passage is generally smaller than the required amount of gas in the second distribution gas passage. The gas normally enters the first distribution gas passage and the second distribution gas passage from the bottom, the top surfaces of the first distribution gas passage and the second distribution gas passage are approximately flush, the second bottom wall is arranged below the first bottom wall at intervals, the space between the first bottom wall and the second bottom wall is also used as a part of the second distribution gas passage, the space above the second bottom wall is enlarged, and the space of the second distribution gas passage is correspondingly enlarged, and the part of the space is equivalent to a premixing cavity of the gas in the second distribution gas passage, so that the gas can be better mixed in the second distribution gas passage. According to the burner, the spaces of the first distribution air passage and the second distribution air passage are reasonably distributed according to the gas demand of the first distribution air passage and the second distribution air passage, so that the first distribution air passage and the second distribution air passage can realize better mixing of gas and air, and the gas combustion sufficiency of the burner using the burner is improved.

The burner provided by the utility model comprises the burner provided by the utility model. The beneficial effects that can be achieved by the burner of the present invention include those that can be achieved by the burner of the present invention, and are not described herein again.

The stove provided by the utility model comprises the stove head or the combustor provided by the utility model. The beneficial effects which can be achieved by the stove are the same as those achieved by the stove head or the burner, and are not repeated herein.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic view of a viewing angle of a furnace end according to an embodiment of the present invention;

fig. 2 is a schematic view of the burner of fig. 1 in an upside-down state;

FIG. 3 is a schematic bottom view of FIG. 1;

FIG. 4 is a schematic sectional view A-A of FIG. 3;

fig. 5 is an assembly schematic view of a first distribution air duct, a first injection pipe and a second bottom wall of the furnace end according to the embodiment of the present invention;

FIG. 6 is a cross-sectional view of FIG. 5;

FIG. 7 is a schematic view of a combustor provided in an embodiment of the present invention;

FIG. 8 is a schematic diagram of the split view of FIG. 7;

fig. 9 is a schematic gas flow diagram of an inner ring structure and an inner ring fire cover of a burner according to an embodiment of the present invention.

Icon: 100-furnace end; 101-a first dispensing airway; 102-a second dispensing airway; 103-inner ring structure; 104-outer ring structure; 105-outer ring distribution airway; 110-a first annular wall; 111-a first sub-wall; 112-a second sub-wall; 120-a second annular wall; 130-a first bottom wall; 140-a second bottom wall; 141-half-ring plane section; 142-a first ramp segment; 143-a second ramp segment; 150-a first baffle; 151-first outlet holes; 152-a first annular strip-shaped hole; 160-a second baffle; 161-a second air outlet; 162-a second annular strip aperture; 163-baffle; 170-a first ejector tube; 180-a second ejector tube; 190-outer ring injection pipe; 200-gas distribution seat; 210-inner ring nozzle; 220-medium ring nozzle; 230-outer ring nozzle; 300-inner ring fire cover; 310-inner ring channel; 320-middle ring channel; 400-outer ring fire lid.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

As shown in fig. 1 to 9, the embodiment provides a furnace end 100, which includes a furnace end body, the furnace end body includes a first annular wall 110 and a second annular wall 120, which are sequentially sleeved from inside to outside, the first annular wall 110 is connected to a first bottom wall 130, and a first distribution air channel 101 is formed between the first bottom wall 130 and the first annular wall 110 above the first bottom wall 130. The second ring wall 120 is connected with a second bottom wall 140, the second bottom wall 140 is spaced below the first bottom wall 130, and the second distribution gas duct 102 is formed between the second bottom wall 140 and the second ring wall 120 above the second bottom wall 140.

In the present embodiment, the upper and lower sides are defined in the direction of the burner 100 in the use state, and the radial direction of the burner 100 is generally parallel to the top surface of the range in the use state of the burner 100. The inner side and the outer side are relative to the center of the radial direction of the burner 100, specifically, the side close to the axis of the burner 100 is inner, and the axis far from the burner 100 is outer.

Since the first distribution gas passage 101 is located inside the second distribution gas passage 102, the required amount of gas in the first distribution gas passage 101 is generally smaller than the required amount of gas in the second distribution gas passage 102. The gas normally enters the first distribution gas passage 101 and the second distribution gas passage 102 from the bottom, the top surfaces of the first distribution gas passage 101 and the second distribution gas passage 102 are approximately flush, the second bottom wall 140 is arranged below the first bottom wall 130 at intervals, the gap between the first bottom wall 130 and the second bottom wall 140 is also used as a part of the second distribution gas passage 102, the space above the second bottom wall 140 is enlarged, and the space of the second distribution gas passage 102 is correspondingly enlarged, and the gap is equivalent to a premixing cavity of the gas in the second distribution gas passage 102, so that the gas can be better mixed in the second distribution gas passage 102.

According to the burner of the embodiment, the spaces of the first distribution air passage 101 and the second distribution air passage 102 are reasonably distributed according to the gas demand of the first distribution air passage 101 and the second distribution air passage 102, so that the first distribution air passage 101 and the second distribution air passage 102 can achieve better mixing of gas and air, and the gas combustion sufficiency of the burner using the burner 100 is improved.

The burner 100 generally comprises an inner ring structure 103 and an outer ring structure 104, wherein the inner ring structure 103 is arranged in the outer ring structure 104 in a spaced manner, an inner ring fire cover 300 is arranged on the top of the inner ring structure 103, and an outer ring fire cover 400 is arranged on the top of the outer ring structure 104. The first distribution air passage 101 and the second distribution air passage 102 may be two-ring distribution air passages formed on the outer ring structure 104, or may be two-ring distribution air passages formed on the inner ring structure 103; it is naturally also possible to form the second distribution airway 102 on the outer ring structure 104 and the first distribution airway 101 on the inner ring structure 103.

In this embodiment, the inner ring structure 103 is provided with two ring distribution air passages as an example, that is, the inner ring structure 103 is provided with a first ring wall 110, a second ring wall 120, a first bottom wall 130 and a second bottom wall 140. In one implementation, the first annular wall 110 may be a separate annular wall, and the first bottom wall 130 is connected to the inner wall of the first annular wall 110, so that the inner side of the first annular wall 110 forms the circular first distribution gas channel 101 above the first bottom wall 130. At this time, the second bottom wall 140 is also circular and is connected to the inner side of the second ring wall 120, and the second distribution gas flue 102 is formed between the first bottom wall 130 and the second bottom wall 140 and between the second ring wall 120 and the first ring wall 110.

In another form, the first distributing air duct 101 is also an annular channel, and the specific first annular wall 110 includes a first sub-wall 111 and a second sub-wall 112 that are both annular, the second sub-wall 112 is spaced and enclosed outside the first sub-wall 111, the first bottom wall 130 is connected between the first sub-wall 111 and the second sub-wall 112, and the first distributing air duct 101 is formed among the first bottom wall 130, the first sub-wall 111 and the second sub-wall 112. At this time, the lower edge of the second sub-wall 112 is located above the lower edge of the first sub-wall 111, the first bottom wall 130 is connected between the lower edge of the second sub-wall 112 and the first sub-wall 111, and the second bottom wall 140 is connected between the lower edge of the first sub-wall 111 and the second annular wall 120.

The first bottom wall 130 is actually an annular wall, and the annular surface of the first bottom wall 130 can be horizontally disposed, in which case the first bottom wall 130 is horizontally connected between the lower edge of the second sub-wall 112 and the first sub-wall 111. In the present embodiment, the first bottom wall 130 is disposed obliquely, as shown in fig. 4, 5 and 6, and an end of the first bottom wall 130 connected to the first sub-wall 111 is lower than an end of the first sub-wall 111 connected to the second sub-wall 112. Specifically, the first sub-wall 111, the second sub-wall 112 and the first bottom wall 130 are integrally configured, and the first bottom wall 130 gradually reduces the inner space of the lower portion of the first distributing air duct 101 in the direction from top to bottom. The second bottom wall 140 is connected between the first sub-wall 111 and the second annular wall 120, the second bottom wall 140 also being in fact an annular plate.

It can be understood that the first bottom wall 130 is disposed obliquely, on one hand, the space of the first distribution air duct 101 can be increased, and at the same time, the first bottom wall 130 also forms a flow guiding surface of the second distribution air duct 102, so that the gas (actually, a mixture of gas and air) of the second distribution air duct 102 can smoothly flow upwards along the second distribution air duct 102, the gas flow resistance is reduced, and dead air inlet corners are avoided, which is favorable for sufficient mixing of the gas in the second distribution air duct 102.

In this embodiment, the first distribution air duct 101 and the second distribution air duct 102 of the burner 100 are connected to separate ejector pipes. Specifically, the first annular wall 110 is provided with a first injection pipe 170, the first injection pipe 170 is vertically arranged, and an air outlet of the first injection pipe 170 is communicated with the first distribution air passage 101. The second annular wall 120 is connected to a second injection pipe 180, and an air outlet of the second injection pipe 180 is communicated with the second distribution air passage 102.

In a preferred implementation, the first ejector tube 170 is connected between the first annular wall 110 and the second annular wall 120 and is formed integrally with the first annular wall 110 and the second annular wall 120. The first ejector pipe 170 is arranged on one radial side of the second annular wall 120, a second ejector pipe 180 is connected to one side, far away from the first ejector pipe 170, of the second annular wall 120 below the first bottom wall 130, and the second ejector pipe 180 is horizontally arranged.

As shown in fig. 1 and 4, the first injection pipe 170 is disposed on the radial left side of the second annular wall 120, the first injection pipe 170 is vertically disposed up and down and forms an integral structure with the second sub-wall 112 and the second annular wall 120, and the pipe wall of the first injection pipe 170 makes the second distribution gas passage 102 be a discontinuous annular structure. The air inlet equivalent to the first injection pipe 170 penetrates out of the second bottom wall 140 and is communicated with the lower part of the second bottom wall 140, so that the gas can be conveniently injected into the first injection pipe 170 by the inner ring nozzle 210 of the gas distribution base 200, and the air can conveniently enter the first injection pipe 170 when being injected by the inner ring nozzle 210.

The second draws and penetrates pipe 180 and sets up on the radial right side of second rampart 120, can be in order to realize dividing the zhonghuan nozzle 220 of gas holder 200 to the second draw and penetrate the pipe 180 internal jet gas and draw simultaneously and penetrate the air to, the second draws the air inlet that penetrates pipe 180 and the first air inlet interval that draws and penetrate pipe 170 far away, can guarantee like this that two draw and penetrate the pipe position and all can have sufficient air, avoid drawing and penetrate the air not enough.

In addition, it should be noted that the mode that the first injection pipe 170 is vertically arranged and the second injection pipe 180 is horizontally arranged realizes that two injection pipes are installed in a limited space, the volume of the furnace end body cannot be excessively increased, and sufficient air distribution can be ensured.

Further, as shown in fig. 2, the height of the second bottom wall 140 of the burner 100 of this embodiment on the side close to the first injection pipe 170 is lower than that on the side of the second bottom wall 140 away from the first injection pipe 170.

Specifically, the second bottom wall 140 includes a half-ring plane section 141, a first inclined plane section 142 and a second inclined plane section 143, the half-ring plane section 141 is disposed on the opposite side of the second annular wall 120 from the first injection pipe 170, the first inclined plane section 142 is connected between one end of the half-ring plane section 141 and the bottom surface of the first injection pipe 170, the second inclined plane section 143 is connected between the other end of the half-ring plane section 141 and the bottom surface of the first injection pipe 170, and the first inclined plane section 142 and the second inclined plane section 143 are both inclined downward from one end of the first injection pipe 170 to one end of the half-ring plane section 141.

It will be appreciated that the second bottom wall 140 is configured to form a premixing chamber at the lower end of the second gas distribution passage 102, so as to facilitate the sufficient mixing of the gas and air in the second gas distribution passage 102. Meanwhile, the second bottom wall 140 is more in installation position for avoiding the air inlet of the first injection pipe 170, so that the first injection pipe 170 and the second injection pipe 180 can be connected with the inner ring nozzle 210 and the middle ring nozzle 220 which are approximately the same in height, the assembly is convenient, air can flow to the air inlet of the first injection pipe 170, and sufficient control of the position of the first injection pipe 170 is ensured.

The top of the first gas distribution duct 101 of the burner 100 of this embodiment is provided with a first baffle 150 and a first annular strip hole 152, and the top of the second gas distribution duct 102 is provided with a second baffle 160 and a second annular strip hole 162. First cyclic annular bar hole 152 extends along the circumference of first distribution gas duct 101, and the both ends of first cyclic annular bar hole 152 correspond respectively at the both ends of first baffle 150, and a plurality of first ventholes 151 that set up along the circumference interval of first distribution gas duct 101 on the first baffle 150, first baffle 150 sets up directly over the gas outlet of first ejector pipe 170. The second annular strip-shaped hole 162 extends along the circumferential direction of the second distribution air duct 102, two ends of the second baffle 160 correspond to two ends of the second annular strip-shaped hole 162 respectively, a plurality of second air outlet holes 161 are formed in the second baffle 160 at intervals along the circumferential direction of the second distribution air duct 102, and the second baffle 160 is arranged right above an air outlet of the second injection duct 180.

Since the burner 100 of this embodiment is further provided with a fire protection chamber in cooperation with the inner ring fire cover 300, and the fire protection chamber can only communicate with the first distribution air passage 101, the second distribution air passage 102 is further provided with a blocking piece 163, and the blocking piece 163 isolates the second distribution air passage 102 from the fire protection chamber. Correspondingly, due to the action of the blocking sheet 163, the second annular holes 162 of the second distribution air duct 102 include two spaced holes, and the two second annular holes 162 are respectively disposed on two sides of the first injection pipe 170.

As shown in fig. 5 and 6, the first ejector pipe 170 is disposed on the left side of the second annular wall 120 (the left side is referred to in fig. 5 and 6, and the right side is referred to in fig. 1), and the first baffle 150 is correspondingly disposed on the left portion of the first distribution air duct 101. As shown in fig. 1, the second baffle 160 is disposed on the opposite side of the first baffle 150.

The first and second outlet holes 151 and 161 may be circular holes.

It will be appreciated that the first annular strip aperture 152 is also an outlet aperture of the first distribution airway 101 and the second annular strip aperture 162 is also an outlet aperture of the second distribution airway 102. The interval is provided with a plurality of first ventholes 151 on the first baffle 150, both can satisfy the requirement of giving vent to anger of this position, and because first venthole 151 is the interval setting, has the sealing between the adjacent hole, can play certain effect of blockking to the gas (gas and air mixture) that first injection pipe 170 jetted into for the gas can flow in first distribution gas way 101 to evenly flow from the top annular space of first distribution gas way 101. Similarly, the second baffle 160 is provided with a plurality of second air outlets 161 at intervals, which not only can meet the air outlet requirement of the position, but also can play a certain role in blocking the fuel gas (fuel gas and air mixture) injected into the second injection pipe 180 because the second air outlets 161 are arranged at intervals and a sealing part is arranged between adjacent holes, so that the fuel gas can flow in the second distribution air flue 102 and uniformly flow out from the annular space at the top of the second distribution air flue 102.

The outer ring structure 104 of the burner 100 of this embodiment includes an outer ring distribution air passage 105, the outer ring distribution air passage 105 is connected to an outer ring injection pipe 190, and an air inlet of the outer ring injection pipe 190 is disposed opposite to an outer ring nozzle 230 of the air distribution base 200.

In conclusion, the furnace end 100 of the embodiment is arranged in a reasonable space, so that the fuel gas can be fully mixed, the full combustion of the fuel gas is facilitated, and the energy-saving and environment-friendly performance is better.

The present embodiment further provides a burner, and the furnace end 100 provided in the present embodiment.

Specifically, the burner further comprises a gas distribution seat 200, an inner ring fire cover 300 and an outer ring fire cover 400, wherein the gas distribution seat 200 is provided with an inner ring nozzle 210, an outer ring nozzle 230 and a middle ring nozzle 220, and the inner ring nozzle 210 is arranged opposite to the gas inlet of the first injection pipe 170 and is used for introducing gas into the first gas distribution duct 101. The outer ring nozzle 230 is disposed opposite to the air inlet of the outer ring ejector pipe 190, and is used for introducing the fuel gas into the outer ring distribution air passage 105. The middle ring nozzle 220 is disposed opposite to the gas inlet of the second injection pipe 180, and is used for introducing gas into the second distribution gas duct 102. The inner ring fire cover 300 is fastened to the inner ring structure 103, and the outer ring fire cover 400 is fastened to the outer ring structure 104. The inner ring fire cover 300 is provided with an inner ring channel 310 and a middle ring channel 320, the inner ring channel 310 is aligned and communicated with the first distribution air passage 101, and the middle ring channel 320 is aligned and communicated with the second distribution air passage 102. An outer ring channel is arranged on the outer ring of the fire cover and is correspondingly communicated with the outer ring gas distributing air passage.

The arrows in fig. 9 indicate the flow direction of the gas.

The burner of the present embodiment has the same beneficial effects as the burner 100 provided by the present embodiment.

The embodiment provides a cooker, which comprises the furnace end 100 or the burner provided by the embodiment.

The stove of the present embodiment has the same beneficial effects as the stove head 100 or the burner provided by the present embodiment.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (13)

1. The burner is characterized by comprising a burner body, wherein the burner body comprises a first annular wall (110) and a second annular wall (120) which are sequentially sleeved from inside to outside, the first annular wall (110) is connected with a first bottom wall (130), a first distribution air channel (101) is formed between the first bottom wall (130) and the first annular wall (110) above the first bottom wall (130);

a second bottom wall (140) is connected to the second annular wall (120), the second bottom wall (140) is arranged below the first bottom wall (130) at an interval, and a second distribution air flue (102) is formed between the second bottom wall (140) and the second annular wall (120) above the second bottom wall (140).

2. The burner according to claim 1, wherein the first annular wall (110) comprises a first sub-wall (111) and a second sub-wall (112) which are both annular, the second sub-wall (112) is spaced and enclosed outside the first sub-wall (111), the first bottom wall (130) is connected between the first sub-wall (111) and the second sub-wall (112), and the first distribution air duct (101) is formed between the first bottom wall (130), the first sub-wall (111) and the second sub-wall (112).

3. The burner of claim 2, wherein the lower edge of the second sub-wall (112) is located above the lower edge of the first sub-wall (111), the first bottom wall (130) is connected between the lower edge of the second sub-wall (112) and the first sub-wall (111), and the second bottom wall (140) is connected between the lower edge of the first sub-wall (111) and the second annular wall (120).

4. The burner according to claim 3, characterized in that the first bottom wall (130) is arranged obliquely, the end of the first bottom wall (130) connected to the first sub-wall (111) being lower than the end of the first sub-wall (111) connected to the second sub-wall (112).

5. The furnace end according to any one of claims 1 to 4, wherein a first injection pipe (170) is arranged on the first annular wall (110), the first injection pipe (170) is vertically arranged, and an air outlet of the first injection pipe (170) is communicated with the first distribution air passage (101).

6. The burner of claim 5, wherein the first ejector tube (170) is connected between the first annular wall (110) and the second annular wall (120) and is formed integrally with the first annular wall (110) and the second annular wall (120).

7. The burner according to claim 6, wherein the first ejector tube (170) is arranged on one radial side of the second annular wall (120), and the second bottom wall (140) is higher on the side close to the first ejector tube (170) than on the side of the second bottom wall (140) away from the first ejector tube (170).

8. The burner of claim 7, wherein the second bottom wall (140) comprises a half-ring plane section (141) and a first inclined plane section (142) and a second inclined plane section (143), the half-ring plane section (141) is disposed on the opposite side of the second annular wall (120) from the first injection pipe (170), the first inclined plane section (142) is connected between one end of the half-ring plane section (141) and the bottom surface of the first injection pipe (170), the second inclined plane section (143) is connected between the other end of the half-ring plane section (141) and the bottom surface of the first injection pipe (170), and the first inclined plane section (142) and the second inclined plane section (143) are both disposed in a downward inclined manner along the direction from the first injection pipe (170) to the half-ring plane section (141).

9. The burner according to claim 6, wherein the first injection pipe (170) is disposed at one radial side of the second annular wall (120), a second injection pipe (180) is connected to one side of the second annular wall (120) away from the first injection pipe (170) below the first bottom wall (130), an air outlet of the second injection pipe (180) is communicated with the second distribution air passage (102), and the second injection pipe (180) is disposed horizontally.

10. The burner according to claim 9, characterized in that the top of the first distribution air flue (101) is provided with a first baffle (150) and a first annular strip hole (152), and the top of the second distribution air flue (102) is provided with a second baffle (160) and a second annular strip hole (162);

the first annular strip-shaped hole (152) extends along the circumferential direction of the first distribution air channel (101), two ends of the first baffle (150) respectively correspond to two ends of the first annular strip-shaped hole (152), a plurality of first air outlet holes (151) are formed in the first baffle (150) at intervals along the circumferential direction of the first distribution air channel (101), and the first baffle (150) is arranged right above an air outlet of the first injection pipe (170);

the second annular strip-shaped hole (162) extends along the circumferential direction of the second distribution air flue (102), two ends of the second baffle plate (160) correspond to two ends of the second annular strip-shaped hole (162), a plurality of second air outlet holes (161) are formed in the second baffle plate (160) along the circumferential direction of the second distribution air flue (102) at intervals, and the second baffle plate (160) is arranged right above an air outlet of the second injection pipe (180).

11. The burner of any one of claims 1 to 4, wherein the burner body comprises an inner ring structure (103) and an outer ring structure (104), the inner ring structure (103) is disposed at an interval inside the outer ring structure (104), and the inner ring structure (103) is provided with the first ring wall (110), the second ring wall (120), the first bottom wall (130) and the second bottom wall (140).

12. A burner, characterized in that it comprises a burner (100) according to any one of claims 1 to 11.

13. A hob, characterized in comprising a burner (100) according to any one of the claims 1 to 11 or a burner according to claim 12.

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