CN112128759B

CN112128759B - Stove burner

Info

Publication number: CN112128759B
Application number: CN202011060832.4A
Authority: CN
Inventors: 杨杰; 陈迪龙; 俞瑜
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-07-23
Anticipated expiration: 2040-09-30
Also published as: CN112128759A

Abstract

The invention relates to a stove burner, which comprises a base; the outer ring fire cover covers the top opening of the outer ring cavity of the base and surrounds the outer ring cavity to form an outer ring gas mixing chamber; the first outer ring injection pipe is transversely arranged on the base and communicated with the outer ring gas mixing chamber; the second outer ring injection pipe is transversely arranged on the base, is arranged at intervals with the first outer ring injection pipe and is communicated with the outer ring gas mixing chamber; the method is characterized in that: the first vent hole communicated with the outer ring gas mixing chamber is basically L-shaped and is arranged close to the inner ring wall of the outer ring cavity, the second vent hole communicated with the outer ring gas mixing chamber is also basically L-shaped, the second vent hole is arranged close to the outer ring wall of the outer ring cavity, and a partition plate is arranged between the second vent hole and the first vent hole. The gas on the two sides can smoothly and quickly flow to the respective direction without generating the phenomena of opposite impact and the like, the flame state of the whole burner is better, and the gas outlet is more uniform.

Description

Stove burner

Technical Field

The invention belongs to the technical field of cookers, and particularly relates to a cooker burner.

Background

The existing stove burner generally comprises a base, an inner ring fire cover and an outer ring fire cover, wherein the inner ring fire cover and the outer ring fire cover are arranged on the base, and when the burner works, inner ring fire and outer ring fire are respectively formed on the inner ring fire cover and the outer ring fire cover.

The present burner, like the chinese invention patent application "an upper air inlet burner and a cooker using the same" previously applied by the applicant, the patent application No. CN201811291757.5 (application publication No. CN111121035A) discloses an upper air inlet burner comprising a first ejector pipe, the first ejector pipe comprises an air outlet end and an air inlet end, and a first ejector is adapted at the air inlet end; the inverted T-shaped base is provided with a horizontal pipe and a vertical pipe which are communicated with each other, the horizontal pipe surrounds the pipe wall of the first injection pipe, the inlet of the horizontal pipe is an air inlet end, the tail end of the horizontal pipe is a blind end, and the air outlet end of the first injection pipe is close to the blind end; thereby first fire lid covers thereby form the first gas mixing chamber that is located central authorities on the vertical pipe, still including the mount pad with set up on the mount pad, and be located first gas mixing chamber periphery and mutually independent second gas mixing chamber, second gas mixing chamber is including the inner circle wall and the outer lane wall that concentric interval set up, the diapire of connecting inner circle wall and outer lane wall and cover the second fire lid in inner circle wall and outer lane wall top. In the patent, the speed of the airflow led out by the two second injection pipes is high, and the opposite impact is likely to occur, so that the airflow is unstable, and the condition of flame separation possibly caused by uneven air outlet is likely to occur.

Therefore, further improvements to existing cooktop burners are needed.

Disclosure of Invention

The first technical problem to be solved by the present invention is to provide a stove burner that can uniformly discharge gas to stabilize flame, in view of the current situation of the prior art.

The second technical problem to be solved by the invention is to provide the stove burner which can achieve the purpose of full combustion by uniformly distributing airflow in the outer ring gas mixing chamber.

The technical scheme adopted by the invention for solving the first technical problem is as follows: a stove burner comprises a base, an annular outer ring cavity with an open top;

the outer ring fire cover covers the top opening of the outer ring cavity and surrounds the outer ring cavity to form an outer ring gas mixing chamber;

the first outer ring injection pipe is transversely arranged on the base and is communicated with the outer ring gas mixing chamber;

the second outer ring injection pipe is transversely arranged on the base, is arranged at intervals with the first outer ring injection pipe and is communicated with the outer ring gas mixing chamber;

the method is characterized in that: the first vent hole communicated with the outer ring gas mixing chamber is basically L-shaped and is arranged close to the inner ring wall of the outer ring cavity, the second vent hole communicated with the outer ring gas mixing chamber is also basically L-shaped, the second vent hole is arranged close to the outer ring wall of the outer ring cavity, and a partition plate is arranged between the second vent hole and the first vent hole.

The first vent hole and the second vent hole are formed in various forms, but preferably, the first outer ring injection pipe is provided with a first air outlet communicated with the first vent hole, the second outer ring injection pipe is provided with a second air outlet communicated with the second vent hole and arranged adjacent to the first air outlet, a cover plate covering the first outer ring injection pipe and the second outer ring injection pipe is arranged in the outer ring air mixing chamber, the cover plate is positioned above the first air outlet and the second air outlet, a separating part for separating the first air outlet and the second air outlet and positioned below the cover plate is arranged between the first air outlet and the second air outlet, a first part of the inner peripheral edge of the cover plate, far away from the second air outlet, is locally recessed and extended to form a first gap, the first vent hole is formed between the first part and the inner annular wall of the outer ring cavity, and a second part of the outer peripheral edge of the cover plate, far away from the first air outlet, is locally recessed and inwardly extended to form a second gap A port, said second vent between said second portion and said outer annular wall of said outer annular chamber.

Preferably, the first notch is formed at an end of the first portion adjacent to the second air outlet, the second notch is formed at an end of the second portion adjacent to the first air outlet, and the partition plate is disposed on the top surface of the cover plate and between the first notch and the second notch in the radial direction. So, separate the air current that first blow vent and second blow vent flow through the baffle for the gas of both sides smoothly and flows to direction separately fast and do not produce the offset, makes the air current distribution in whole outer loop mixes the gas chamber relatively even, and it is more even to give vent to anger, and the flame of so whole combustor is more stable, is difficult to produce from the flame phenomenon.

In order to guide the flow of the air flow and enable the air to be mixed more uniformly, a first blocking wall extends upwards to form the first part, a second blocking wall connected with the first blocking wall extends upwards to form the second part, and the partition plate is formed by upwards extending partial areas of the first blocking wall and the second blocking wall. The speed of giving vent to anger of first blow vent of L shape and second blow vent is very fast, and the baffle that increases carries out the drainage to the air current, only local offset slows down near outer ring fire lid fire hole air velocity directly over first blow vent and the second blow vent, has reached the purpose of steady flame.

In order to guide the airflow on the corresponding side, the partition is gradually inclined outwards from the inside along the flowing direction of the airflow flowing out through the second air outlet.

The partition may be disposed on the bottom surface of the cover plate, or may be formed on the bottom wall of the outer ring cavity, but preferably, the partition is a protrusion disposed on the bottom wall of the outer ring cavity and extending partially upward, and the protrusion is located between the first air outlet and the second air outlet.

Specifically, the longitudinal section of the convex part is basically in an inverted V shape, a first guide part extending downwards is arranged at a position, adjacent to the outer periphery, of the bottom surface of the cover plate, the first guide part is arranged adjacent to the first outer ring injection pipe, the bottom surface of the first guide part is matched with the corresponding side surface of the convex part, and a first channel for communicating the first air outlet and the first air vent is formed among the first guide part, the cover plate and the outer ring cavity; the position that the bottom surface of apron is close to the internal perisporium has downwardly extending's second guide portion, the second guide portion is close to the second outer loop draws the pipe setting, and the bottom surface with the corresponding side phase-match of convex part, be formed with the intercommunication between second guide portion, apron and the outer loop cavity the second passageway of second gas outlet and second gas vent. Therefore, negative pressure is generated after airflow flowing out of the first outer ring injection pipe and the second outer ring injection pipe enters the corresponding channel, the airflow of the outer ring injection pipe on the corresponding side can be extracted, and airflow mixing is accelerated.

In order to improve the injection capacity, the inner surface of the first guide part is a first arc-shaped surface which is gradually bent inwards and extends along the airflow flowing direction of the first air outlet, and the outer surface of the second guide part is a second arc-shaped surface which is gradually bent outwards and extends along the airflow flowing direction of the second air outlet. So, lead to the air current, reduce the resistance of giving vent to anger to improve and draw and penetrate kinetic energy, make the mixture more abundant.

In order to avoid injecting the air current that the pipe flows and injecting at the opposite place through first outer ring and injecting the pipe and second outer ring, the outer loop gas mixing chamber is internal to be located and is kept away from be provided with the grid of vertical setting on the position of baffle, set up a plurality of grid holes of interval arrangement from top to bottom on the grid, the grid has two and along circumference interval arrangement, and is formed with the cushion chamber between the two. Therefore, energy attenuation caused by collision of gas on two sides is avoided, gas outlet is more uniform, combustion is stable, and mixing is sufficient.

In order to make the combustion more stable, a flow guide wall positioned in the buffer cavity is arranged below each grid hole, and the flow guide wall gradually inclines towards the buffer cavity from bottom to top. So, the air current flow direction is upwards inclined, and the minute speed that makes progress of the air current of both sides can remain and stack even, reduces the loss of kinetic energy for buffer area burning is more steady, more abundant, has avoided the production of bad phenomena such as yellow flame.

In order to ensure the stability and reliability of fire transmission, the upper surface of the top plate of the outer ring fire cover is convexly provided with a convex block extending along the radial direction, the convex block is provided with at least one fire transmission groove extending along the radial direction, the bottom surface of the fire transmission groove is provided with a gas transmission hole communicated with the buffer cavity, and a gap is reserved between the grating and the outer ring fire cover. Therefore, the gas flow rate at the fire transfer groove is lower, the flame is more stable, and the flame is less prone to leaving.

The technical scheme adopted by the invention for solving the second technical problem is as follows: the outer ring fire cover is provided with a fire hole, a flow guide element is arranged in the outer ring gas mixing chamber, the top surface of the flow guide element is positioned above the first vent hole and the second vent hole and below the fire hole, and the part of the outer ring gas mixing chamber is divided into an upper flow channel and a lower flow channel which are arranged up and down.

Preferably, the number of the flow guide parts is at least three, the flow guide parts are arranged at intervals along the circumferential direction, and the top surfaces of the flow guide parts are positioned on the same horizontal plane.

In order to increase ejection, the first outer ring ejection pipe and the second outer ring ejection pipe respectively comprise a contraction section, a first mixing section and a second mixing section along an airflow flow path, the cross section area of the contraction section is gradually reduced along the airflow flow path, the cross section areas of the first mixing section and the second mixing section are equal, and the cross section area of the second mixing section is larger than that of the first mixing section.

Compared with the prior art, the invention has the advantages that: this cooking utensils combustor's first outer loop draws and penetrates the first blow vent that pipe and outer loop gas mixing chamber are linked together and be L shape basically, and be close to the inner ring wall setting of outer loop cavity, the second outer loop draws the second blow vent that pipe and outer loop gas mixing chamber are linked together and also be L shape basically, the first blow vent of L shape and the speed of giving vent to anger of second blow vent are very fast, one of above-mentioned first blow vent and second blow vent is close to the outside near inboard one, the baffle is gaseous separately with both sides, make the gas of both sides can be smooth and easy and quick flow to respective direction and do not produce phenomenons such as offset, the flame state of whole combustor is better, it can be more even to give vent to anger.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment;

FIG. 2 is a schematic view of the structure of FIG. 1 from another angle;

FIG. 3 is a cross-sectional view of FIG. 1;

FIG. 4 is a schematic structural view of the inner ring fire cover and the outer ring fire cover of FIG. 1 with the fire covers removed;

FIG. 5 is a cross-sectional view of a portion of the structure of FIG. 1;

FIG. 6 is a cross-sectional view at another angle from FIG. 1;

FIG. 7 is a schematic structural view of a cover plate;

FIG. 8 is a schematic view of the structure of FIG. 7 at another angle;

FIG. 9 is a schematic view of the structure of FIG. 8 at another angle;

FIG. 10 is a cross-sectional view of FIG. 2;

FIG. 11 is a schematic view of the structure of the grid;

FIG. 12 is a cross-sectional view at another angle of FIG. 2;

fig. 13 is a schematic structural view of the base.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 13, the stove burner according to the embodiment of the present invention is an upper air inlet burner, and includes a base 1, an outer ring fire cover 2, a flow guide member 3, a first outer ring injection pipe 41, a second outer ring injection pipe 42, a cover plate 62, an inner ring fire cover 7, and a grid 8.

As shown in fig. 1, 2 and 13, the base 1 has an annular outer cavity 11 with an open top, the outer cavity 11 includes an inner annular wall 111 and an outer annular wall 112 located at the periphery of the inner annular wall, an inner annular channel 12 with an open top is located at the inner periphery of the outer cavity 11, the cross section of the base 1 is circular, and the outer annular wall and the inner annular wall of the outer cavity are both circular. The inner ring fire cover 7 covers the top opening of the inner ring channel 12, and an inner ring gas mixing chamber 13 is formed by enclosing between the inner ring fire cover and the inner ring channel 12. The outer ring fire cover 2 covers the top opening of the outer ring cavity 11 and forms an outer ring air mixing chamber C with the outer ring cavity 11 in an enclosing manner, the outer ring fire cover 2 in this embodiment comprises an annular top plate 200, an annular outer wall plate 201 is formed by extending downwards at a position of the top plate 200 adjacent to the outer periphery, an annular inner wall plate 202 is formed by extending downwards at a position of the top plate 200 adjacent to the inner periphery, the inner wall plate 202 is placed on the inner ring wall of the outer ring cavity 11, the outer wall plate 201 is placed on the outer ring wall of the outer ring cavity 11, a plurality of fire holes 21 are formed in the outer wall plate 201 and are arranged at intervals in the circumferential direction, a protruding block 22 extending in the radial direction is convexly arranged on the upper surface of the top plate 200, at least one fire transfer groove 221 extending in the radial direction is formed in the protruding block 22, in this embodiment, one fire transfer groove 221 is provided, and the bottom surface of the fire transfer groove 221 is provided with a gas transfer hole 2211 communicated with the outer ring gas mixing chamber C.

As shown in fig. 13, the first outer ring ejector pipe 41 is transversely disposed on the base 1, and the first outer ring ejector pipe 41 has a first air outlet 411 communicated with the outer ring air mixing chamber C. The second outer ring injection pipe 42 is transversely arranged on the base 1 and is arranged side by side with the first outer ring injection pipe 41 at intervals, the second outer ring injection pipe 42 is provided with a second air outlet 421 which is communicated with the outer ring air mixing chamber C and is arranged adjacent to the first air outlet 411, and the first air outlet 411 and the second air outlet 421 are both positioned in the outer ring cavity 11. The direction of the airflow flowing out through the second outer ring injection pipe 42 is substantially the same as the direction of the airflow flowing out through the first outer ring injection pipe 42, that is, the direction of the airflow sprayed out through the first outer ring injection pipe 41 is substantially the same as the direction of the airflow sprayed out through the second outer ring injection pipe 42, and the direction of the airflow flowing out is specifically referred to the direction indicated by the hollow arrow in fig. 13 under the guidance of the inner annular wall and the outer annular wall of the outer ring cavity 11.

As shown in fig. 5, along the airflow flow path, each of the first outer ring ejector pipe 41 and the second outer ring ejector pipe 42 includes a contraction section 400, a first mixing section 401 and a second mixing section 402, along the airflow flow path, the cross-sectional area of the contraction section 400 is gradually reduced, the cross-sectional areas of the first mixing section 401 are equal, the cross-sectional areas of the second mixing section 402 are equal, and the cross-sectional area of the second mixing section 402 is smaller than the cross-sectional area of the first mixing section 401, specifically, the end of the first mixing section 401 has a contraction port with a gradually reduced cross-section. Thus, after the gas-air mixture passes through the contraction section 400, the gas flow speed is increased due to the rapid reduction of the gas inlet cross-sectional area, and the gas enters the first mixing section 401 to complete the first mixing. Because along journey resistance loss, the velocity of mist reduces by a wide margin, advances second mixing section 402 afterwards, and the cross-sectional area further reduces, and the gas flow rate of mist increases, then further mixes in second mixing section 402, and the mist that flows out through first outer loop ejector pipe enters into first passageway A, and the mist that flows out through second outer loop ejector pipe enters into second passageway B, because the volume enlarges, produces the negative pressure and draws out the mist in corresponding outer loop ejector pipe, mixes with higher speed. In this embodiment, the air outlet areas of the first and second air vents are slightly larger than the cross-sectional area of the second mixing section 402 on the corresponding side.

As shown in fig. 13, a partition for separating the first air outlet 411 and the second air outlet 421 is provided between the two air outlets, in this embodiment, the partition is a protrusion 113 disposed on the bottom wall of the outer ring cavity 11 and extending partially upward, and the longitudinal section of the protrusion 113 is substantially inverted V-shaped. As shown in fig. 12, the cover plate 62 is located in the outer ring air mixing chamber C and covers the first outer ring ejector pipe 41, the second outer ring ejector pipe 42, and the protrusion 113. As shown in fig. 4, a first portion of the inner peripheral edge of the cover plate 62, which is far away from the second air outlet 421, is partially recessed and extended outward to form a first notch 621, the first notch 621 is disposed adjacent to the second air outlet 421, the first portion is extended upward to form a first blocking wall 62a, a first air vent 51 communicated with the first air outlet 411 is formed between the first blocking wall 62a and the inner annular wall 111 of the outer ring cavity 11, the first air vent 51 is substantially L-shaped, the first air outlet 411 is located upstream of the first air vent 51 along the flow direction of the air flow flowing out through the first air outlet 411, and the first air vent 51 is communicated with the outer ring air mixing chamber C.

As shown in fig. 4, a second portion of the outer periphery of the cover plate 62, which is away from the first air outlet 411, is partially recessed and extended to form a second notch 622, the second portion is extended upward to form a second blocking wall 62b connected to the first blocking wall 62a, a second air vent 52 communicated with the second air outlet 421 is formed between the second blocking wall 62b and the outer ring wall 112 of the outer ring cavity 11, the second air vent 52 is also substantially L-shaped, along the flow path of the air flow flowing out through the second air outlet 421, the second air outlet 421 is located upstream of the second air vent 52, and the second air vent 52 is communicated with the outer ring air mixing chamber C. The first vent hole 51 and the second vent hole 52 are adjacently arranged, the first blocking wall 62a and the second blocking wall 62b are connected to form an extension plate, the area of the extension plate adjacent to the middle is extended upwards to form a partition plate 623, along the radial direction of the base 1, the partition plate 623 is positioned between the first gap 621 and the second gap 622, and along the flowing direction of the gas flow flowing out through the second vent hole 421, the partition plate 623 gradually inclines outwards from the inside, the top surface of the partition plate 623 is positioned on the top surface of the first blocking wall 62a and the top surface of the second blocking wall 62b, due to certain viscosity of the gas, after the gas flow rapidly passes through the heightening partition plate 623, due to wall attachment effect, the gas flowing direction flows to the heightening partition plate 623 side, and below the gas flowing direction, just the gas flow ejected by the first outer ring ejector pipe and the second outer ring ejector pipe, two gas mixtures at relatively higher positions collide, two air current collisions, mix more evenly, are favorable to abundant burning, when two air current collisions, can make first outer ring draw and penetrate pipe and second outer ring draw and penetrate the pipe and draw the high-speed gas velocity of spun upwards to drop to guarantee that the burning of near first gas outlet and the second gas outlet is stable, do not take place to leave bad phenomena such as flame.

As shown in fig. 7, 8, 10 and 12, a first guide portion 624 extending downward is disposed at a position adjacent to the outer periphery of the bottom surface of the cover plate 62, the first guide portion 624 is disposed adjacent to the first outer ring ejector tube 41, the bottom surface of the first guide portion 624 is matched with the corresponding side surface of the protrusion 113, and a first passage a communicating the first air outlet 411 and the first air vent 51 is formed among the first guide portion 624, the cover plate 62 and the outer ring cavity 11. The bottom surface of the cover plate 62 is provided with a second guide part 625 extending downwards at a position adjacent to the inner peripheral edge, the second guide part 625 is arranged adjacent to the second outer ring injection pipe 42, the bottom surface of the second guide part 625 is matched with the corresponding side surface of the convex part 113, and a second channel B communicating the second air outlet 421 and the second air outlet 52 is formed among the second guide part 625, the cover plate 62 and the outer ring cavity 11. The inner surface of first guide portion 624 is a first arc-shaped face 6241 that extends to be gradually curved inward along the flow direction of the airflow passing through first air outlet 411, and the outer surface of second guide portion 625 is a second arc-shaped face 6251 that extends to be gradually curved outward along the flow direction of the airflow passing through second air outlet 421.

Because the gas ejected by the first outer ring injection pipe and the second outer ring injection pipe can generate large-area hedging at the opposite positions of the first gas outlet and the second gas outlet, the kinetic energy of the gas at the opposite positions is rapidly attenuated, and the flow rate of the gas is rapidly reduced. Resulting in poor flame combustion conditions above the hedging zone, which is liable to generate yellow flames, and in order to reduce the rapid attenuation of the kinetic energy at the hedging, as shown in fig. 6, the grille 8 is vertically disposed in the outer annular cavity 11 and is disposed at a position distant from the baffle 623. A gap E is reserved between the grating 8 and the outer ring fire cover 2, and airflow is smoother.

In this embodiment, as shown in fig. 5 and 6, two grids 8 are arranged at intervals along the circumferential direction, as shown in fig. 6 and 11, the bottoms of the two grids 8 are connected by a connecting plate 82, the connecting plate 82 is located on the bottom surface of the outer ring cavity 11, and the bottom surface of the connecting plate 82 is matched with the bottom surface of the outer ring cavity 11, so as to facilitate the positioning and installation of the connecting plate 82. The grating 8 is provided with a plurality of grating holes 81 arranged up and down at intervals, the grating holes 81 are strip-shaped holes extending along the radial direction basically, and a buffer cavity D is formed between the two gratings 8 and the connecting plate 82. In order to guide the air flow into the buffer cavity D, a flow guide wall 811 positioned in the buffer cavity D is arranged below each grid hole 81, the flow guide wall 811 gradually inclines towards the direction of the buffer cavity D from bottom to top, and the included angle between the flow guide wall 811 and the horizontal plane is 10-80 degrees. The existence of two grids 8, after the grid hole that the both sides air current passed through the grid, the gas velocity of flow is even to make flow direction slant upwards, the ascending minute speed of both sides air current can remain and stack even, reduces the loss of kinetic energy, makes the buffer zone burning more steady, more abundant, has avoided the production of bad phenomena such as yellow flame. In addition, the gas transfer holes 2211 of the fire transfer chute 221 communicate with the buffer chamber D, and the projection of the fire transfer chute 221 in the vertical direction is located between the two grills 8. Therefore, the gas flow rate at the fire transfer groove is ensured to be slower, the flame is more stable, and the flame is less prone to leaving the flame, so that the purpose of reliable fire transfer is achieved.

As shown in fig. 3 and 4, the flow guide member 3 is disposed in the outer ring air mixing chamber C, the flow guide member 3 includes a substantially horizontally disposed flow guide plate 31 and a support portion 32 disposed on the flow guide plate 31, and the support portion 32 is disposed in the outer ring cavity 11. The number of the flow guide parts 3 is at least three, the flow guide parts are arranged at intervals along the circumferential direction, and the top surfaces of the flow guide parts 3 are positioned on the same horizontal plane. The top surface of the flow guide 3 is located above the first and

second vents

51 and 52 and below the fire hole 21. The part of the outer ring gas mixing chamber C is divided by the flow guide piece 3 to form an upper flow channel 3a and a lower flow channel 3b which are arranged up and down, the mixed gas flow in the outer ring gas mixing chamber respectively flows into the upper flow channel 3a and the lower flow channel 3b after passing through the flow guide piece, and the gas flow is mixed after flowing out, so that the opposite impact of the gas flows at two sides is reduced. The existence of the flow guide piece 3 enables a flow equalizing field to be formed in the outer ring gas mixing chamber, namely airflow flows like laminar flow, flame is more uniform, and combustion is more sufficient.

Claims

1. A stove burner comprises

The base (1) is provided with an annular outer ring cavity (11) with an open top;

the outer ring fire cover (2) covers the top opening of the outer ring cavity (11) and surrounds the outer ring cavity (11) to form an outer ring gas mixing chamber (C);

the first outer ring injection pipe (41) is transversely arranged on the base (1) and communicated with the outer ring gas mixing chamber (C);

the second outer ring injection pipe (42) is transversely arranged on the base (1), is arranged at an interval with the first outer ring injection pipe (41), and is communicated with the outer ring gas mixing chamber (C);

the method is characterized in that: the first vent hole (51) communicated with the outer ring air mixing chamber (C) through the first outer ring ejector pipe (41) is basically L-shaped and is arranged close to the inner ring wall (111) of the outer ring cavity (11), the second vent hole (52) communicated with the outer ring air mixing chamber (C) through the second outer ring ejector pipe (42) is also basically L-shaped, the second vent hole (52) is arranged close to the outer ring wall (112) of the outer ring cavity (11), and a partition plate (623) is arranged between the second vent hole and the first vent hole (51).

2. The cooktop burner of claim 1, wherein: the first outer ring injection pipe (41) is provided with a first air outlet (411) communicated with the first air vent (51), the second outer ring injection pipe (42) is provided with a second air outlet (421) communicated with the second air vent (52) and arranged adjacent to the first air outlet (411), a cover plate (62) covering the first outer ring injection pipe (41) and the second outer ring injection pipe (42) is arranged in the outer ring air mixing chamber (C), the cover plate (62) is positioned above the first air outlet (411) and the second air outlet (421), a partition part for separating the first air outlet (411) and the second air outlet (421) is arranged below the cover plate (62), and a first part of the inner peripheral edge of the cover plate (62), which is far away from the second air outlet (421), is locally recessed outwards and extends to form a first notch (621), the first vent hole (51) is formed between the first part and the inner annular wall (111) of the outer annular cavity (11), a second part of the outer periphery of the cover plate (62) far away from the first air outlet (411) is partially inwards sunken and extends to form a second notch (622), and the second vent hole (52) is formed between the second part and the outer annular wall (112) of the outer annular cavity (11).

3. The cooktop burner of claim 2, wherein: the first notch (621) is formed at an end of the first portion adjacent to the second air outlet (421), the second notch (622) is formed at an end of the second portion adjacent to the first air outlet (411), and the partition plate (623) is disposed on a top surface of the cover plate (62) and between the first notch (621) and the second notch (622) in a radial direction.

4. The cooktop burner of claim 3, wherein: the first part extends upwards to form a first blocking wall (62a), the second part extends upwards to form a second blocking wall (62b) connected with the first blocking wall (62a), and the partition plate (623) is formed by extending upwards for partial areas of the first blocking wall (62a) and the second blocking wall (62 b).

5. The cooktop burner of claim 2, wherein: the partition plate (623) is gradually inclined outward from the inside in the flow direction of the air flow flowing out through the second air outlet (421).

6. The cooktop burner of claim 2, wherein: the separating part is a convex part (113) which is arranged on the bottom wall of the outer ring cavity (11) and partially extends upwards, and the convex part (113) is positioned between the first air outlet (411) and the second air outlet (421).

7. The cooktop burner of claim 6, wherein: the longitudinal section of the convex part (113) is basically in an inverted V shape, a first guide part (624) extending downwards is arranged at the position, close to the outer periphery, of the bottom surface of the cover plate (62), the first guide part (624) is arranged close to the first outer ring injection pipe (41), the bottom surface of the first guide part is matched with the corresponding side surface of the convex part (113), and a first channel (A) for communicating the first air outlet (411) with the first air vent (51) is formed among the first guide part (624), the cover plate (62) and the outer ring cavity (11); the position that the bottom surface of apron (62) is close to the inner periphery has downwardly extending's second guide portion (625), second guide portion (625) are close to second outer loop ejector tube (42) sets up, and the bottom surface with the corresponding side phase-match of convex part (113), be formed with between second guide portion (625), apron (62) and the outer loop cavity (11) and communicate second gas outlet (421) and second passageway (B) of second gas vent (52).

8. The cooktop burner of claim 7, wherein: the inner surface of the first guide portion (624) is a first arc-shaped surface (6241) which gradually curves inward and extends along the flow direction of the airflow passing through the first air outlet (411), and the outer surface of the second guide portion (625) is a second arc-shaped surface (6251) which gradually curves outward and extends along the flow direction of the airflow passing through the second air outlet (421).

9. The cooktop burner of any of claims 1 to 8, wherein: the inner position of outer loop gas mixing chamber (C) is kept away from be provided with vertical grid (8) that sets up on the position of baffle (623), set up a plurality of grid holes (81) of interval arrangement from top to bottom on grid (8), grid (8) have two and along circumference interval arrangement, and are formed with cushion chamber (D) between the two.

10. The cooktop burner of claim 9, wherein: flow guide walls (811) positioned in the buffer cavity (D) are arranged below the grid holes (81), and the flow guide walls (811) gradually incline towards the buffer cavity (D) from bottom to top.

11. The cooktop burner of claim 9, wherein: the outer ring fire cover is characterized in that a protruding block (22) extending along the radial direction is convexly arranged on the upper surface of a top plate of the outer ring fire cover (2), at least one fire transmission groove (221) extending along the radial direction is formed in the protruding block (22), a gas transmission hole (2211) communicated with the buffer cavity (D) is formed in the bottom surface of the fire transmission groove (221), and a gap (D) is reserved between the grating (8) and the outer ring fire cover (2).

12. The cooktop burner of claim 9, wherein: the outer ring fire cover (2) is provided with a fire hole (21), a flow guide piece (3) is arranged in the outer ring air mixing chamber (C), the top surface of the flow guide piece (3) is positioned above the first vent hole (51) and the second vent hole (52) and below the fire hole (21), and the part of the outer ring air mixing chamber (C) is separated to form an upper flow channel (3a) and a lower flow channel (3b) which are arranged up and down.

13. The cooktop burner of claim 12, wherein: the number of the flow guide parts (3) is at least three, the flow guide parts are arranged at intervals along the circumferential direction, and the top surfaces of the flow guide parts (3) are positioned on the same horizontal plane.

14. The cooktop burner of claim 1, wherein: along the airflow flow path, each of the first outer ring ejector pipe (41) and the second outer ring ejector pipe (42) comprises a contraction section (400), a first mixing section (401) and a second mixing section (402), the cross-sectional area of the contraction section (400) is gradually reduced along the airflow flow path, the cross-sectional areas of the first mixing section (401) and the second mixing section (402) are equal, and the cross-sectional area of the second mixing section (402) is smaller than that of the first mixing section (401).