A burner

Abstract

The present invention provides a burner, comprising a burner head, a base and a fire distribution cover, wherein the fire distribution cover comprises an outer ring fire cover and an inner ring fire cover; the outer ring fire cover comprises a top wall, an inner side wall and an outer side wall, an inner bevel is connected between the top wall and the inner side wall, a groove group one is provided on the inner bevel, the groove group one comprises at least one groove one, an inner ring fire hole is provided in the groove one; an outer bevel is connected between the top wall and the outer side wall, a groove group two is provided on the outer bevel, the groove group two comprises at least one groove two, an outer ring fire hole is provided in the groove two. The outer ring fire cover of the present invention adopts the cooperation of the inner ring fire hole and the outer ring fire hole to form two gas streams, thereby enhancing the mixing degree of gas and air and improving the combustion efficiency of the burner, and at the same time, forming an inner and outer ring flame on the outer ring fire cover, thereby improving the thermal efficiency of the burner, and the inner ring fire hole is provided in the groove one and the outer ring fire hole is provided in the groove two, thereby making it less likely for flame separation to occur and making the combustion more complete.

Description

Technical Field

[0001] The invention belongs to the technical field of burners, and in particular relates to a burner. Background Art

[0002] As a convenient and fast cooking appliance, gas stoves have become popular in the kitchens of thousands of households. The burners of gas stoves can use gas fuels such as liquefied petroleum gas, artificial coal gas, and natural gas for direct fire heating, thereby quickly heating cooking pots. As for the existing burner components, they generally include a burner (including a burner head, a gas distribution plate and a fire cover, etc.), a control valve, an igniter, an ejector tube, etc. Its working process is that the gas supplied by an external gas pipe or a gas tank is transported to the burner through the control valve and the ejector tube, and the igniter ignites the gas at the burner to generate heat. The existing outer fire cover is provided with one or more fire discharge holes on the outer wall, while the inner wall of the outer fire cover is not provided with fire discharge holes. The inner side only relies on the fire discharge holes on the inner fire cover on the burner to form an inner ring flame, and the outer wall of the outer fire cover is generally a circular surface. The number of fire discharge holes is small, the fire discharge area is small, the combustion efficiency of the burner is average, and the combustion is insufficient. Existing patent documents disclose a utility model patent for an outer ring fire cover and burner that is easy to ignite (Announcement No.: CN217540742U). Its technical solution records that a row of fire holes are set on the outer wall of the outer fire cover, but no fire holes are set on the inner wall of the outer fire cover. The overall combustion efficiency is average, the combustion is insufficient, and the above-mentioned technical problems also exist. Summary of the Invention

[0003] The purpose of the present invention is to provide a technical solution for a burner in response to the shortcomings of the existing technology. The structural design is ingenious and reasonable, and the practicability is strong. The outer ring fire cover adopts the cooperation of the inner ring fire hole and the outer ring fire hole to form two gas airflows, enhance the mixing degree of gas and air, and improve the combustion efficiency of the burner. At the same time, two inner and outer ring flames are formed on the outer ring fire cover to improve the thermal efficiency of the burner. The inner ring fire hole is arranged in groove one, and the outer ring fire hole is arranged in groove two. The design of the groove can increase the flame area at the fire hole, making it less likely to cause flame separation and making the combustion more complete.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A burner comprises a burner head, a base and a fire distribution cover, wherein the base is arranged on the burner head, the fire distribution cover is arranged on the base, and the fire distribution cover comprises an outer ring fire cover and an inner ring fire cover; the burner is characterized in that:

[0006] The outer ring fire cover includes a top wall, an inner side wall and an outer side wall. An inner bevel is connected between the top wall and the inner side wall. A groove group 1 is provided on the inner bevel. The groove group 1 includes at least one groove 1. An inner ring fire hole is provided in the groove 1.

[0007] An outer slope is connected between the top wall and the outer side wall, and a groove group 2 is provided on the outer slope. The groove group 2 includes at least one groove 2, and an outer ring fire hole is provided in the groove 2;

[0008] The inner ring fire outlet holes are coordinated with the outer ring fire outlet holes to form two gas airflows, thereby enhancing the mixing degree of gas and air and improving the combustion efficiency of the burner. At the same time, two inner and outer ring flames are formed on the outer ring fire cover, thereby improving the thermal efficiency of the burner. The inner ring fire outlet holes are arranged in groove one, and the outer ring fire outlet holes are arranged in groove two. The groove design can increase the flame area at the fire outlet holes, making it less likely for flame separation to occur.

[0009] A fire transfer groove is provided on the outer ring fire cover, which is used to conduct the flame to the outer ring fire hole. The fire transfer groove is provided on the surface of the outer ring fire cover, shortening the connection path between the inner ring fire hole and the outer ring fire hole, which is more conducive to the transmission of the inner flame to the outer flame, improving the reliability of flame transmission, and making the flame transmission effect good, fast and short.

[0010] Furthermore, groove group one is provided with at least two groups, and several groove group one are distributed circumferentially along the inner bevel, and groove group one is distributed circumferentially on the inner bevel, and groove group one is preferably arranged to be uniformly distributed circumferentially on the inner bevel to ensure the uniformity of the layout of the inner ring fire holes, thereby forming a stable inner annular flame and achieving uniform heating.

[0011] Furthermore, groove group two is provided with at least two groups, and several groove groups two are distributed circumferentially along the outer inclined surface. Groove group two is distributed circumferentially on the outer inclined surface, and groove group two is preferably arranged to be evenly distributed circumferentially on the outer inclined surface to ensure the uniformity of the layout of the outer ring fire holes, thereby forming a stable outer annular flame and achieving uniform heating, and an anti-burning zone is formed between adjacent groove groups two, so that the outer flame can avoid the pot support, thereby avoiding the pot claws of the pot support from being burned, reducing heat loss, and reducing the carbon monoxide content in the combustion products.

[0012] Furthermore, the outer wall, outer bevel, top wall, inner bevel and inner wall are connected in sequence to form an air mixing chamber at the bottom of the outer ring fire cover, and the inner ring fire hole and the outer ring fire hole are both connected with the air mixing chamber. A reinforcing protrusion is provided in the air mixing chamber, and the inner ring fire hole passes through the reinforcing protrusion. The gas and air are mixed in the air mixing chamber and buffered in the air mixing chamber. The inner ring fire hole and the outer ring fire hole are both connected with the air mixing chamber, so that the gas in the air mixing chamber can enter the inner ring fire hole and the outer ring fire hole. The design of the reinforcing protrusion can enhance the overall structural strength of the outer ring fire cover, improve the quality of the outer ring fire cover, and extend the service life of the outer ring fire cover. The inner ring fire hole just passes through the reinforcing protrusion, so that the outer ring fire cover is not easy to break when the inner ring fire hole is processed, thereby facilitating the processing and manufacturing of the outer ring fire cover.

[0013] Furthermore, the reinforcing protrusions are distributed circumferentially along the mixing chamber, and guide grooves are formed between two adjacent reinforcing protrusions. The reinforcing protrusions are circumferentially distributed in the mixing chamber, and the reinforcing protrusions are preferably arranged to be evenly distributed circumferentially in the mixing chamber, thereby improving the structural stability and firmness of the entire outer ring fire cover, and guide grooves are formed between adjacent reinforcing protrusions. The guide grooves can more conveniently guide the gas to the outer ring fire outlet, thereby improving the combustion efficiency of the outer ring fire cover and also playing a role in stabilizing the fire.

[0014] Furthermore, the inner slope extends downward from the inner edge of the top wall to the inner side wall, and the outer slope extends downward from the outer edge of the top wall to the outer side wall. The inner and outer slopes are straight or curved, and the design is simple and reasonable. The inner and outer slopes can be adjusted to straight or curved according to actual design requirements. The outer slope adopts a slope design to guide the secondary air well, thereby improving combustion efficiency. In this application, the inner slope is preferably designed to be a curved slope, so as to ensure the energy gathering effect on the inner side of the outer ring fire cover. The inner and outer slopes are not limited to straight or curved, but can also be a combination of straight lines and curves.

[0015] Furthermore, fire transfer holes are provided on both sides of the fire transfer groove, and groove one adjacent to the fire transfer hole is a blind groove, and groove one adjacent to the fire transfer hole is a blind groove design. No inner ring fire outlet hole is provided on the groove one, thereby improving the structural strength of the outer ring fire cover where the fire transfer groove and the fire transfer hole are provided, and extending the service life of the outer ring fire cover. The fire transfer holes are provided on both sides of the fire transfer groove, and the fire transfer holes are preferably symmetrically provided on both sides of the fire transfer groove, so that the gas formed above the end of the fire transfer groove has a steady flow, thereby making the flame combustion more stable and improving the flame quality, and the fire transfer hole is provided close to the inner side wall of the outer ring fire cover, so that the fire transfer groove can transfer the flame at the fire transfer hole to the outside of the outer ring fire cover, ignite the outer ring fire outlet hole, and make the flame transfer more stable and reliable.

[0016] Furthermore, the outer ring fire holes are tilted on the outer inclined surface, and the outer ring fire holes are tilted downward from the outside of the outer ring fire cover to the inside of the gas mixing chamber. The design is ingenious and reasonable. This design makes the end of the outer ring fire holes connected to the gas mixing chamber lower than the flame outlet end of the outer ring fire holes, so that it is roughly the same as the direction of upward transmission of the gas, which is more conducive to the transmission of gas into the outer ring fire holes, making the flame conduction more reliable.

[0017] Furthermore, the outer ring fire hole includes outer ring fire hole one and outer ring fire hole two. The diameter of outer ring fire hole one is larger than the diameter of outer ring fire hole two. Outer ring fire hole one and outer ring fire hole two are distributed up and down in groove two. The design is reasonable. The outer ring fire hole adopts the design of outer ring fire hole one and outer ring fire hole two, so that two rows of outer ring fire holes are formed on the outside of the outer ring fire cover. The upper outer ring fire hole one is the main combustion fire hole, and the lower outer ring fire hole two is the main flame stabilization fire hole, thereby making the outer flame more stable.

[0018] Furthermore, a positioning protrusion is provided at the bottom of the outer ring fire cover, and the positioning protrusion includes positioning protrusion one and positioning protrusion two. Positioning protrusion one is provided close to the outer wall of the outer ring fire cover, and positioning protrusion two is provided close to the inner wall of the outer ring fire cover. Positioning protrusion one and positioning protrusion two can cooperate with the base to facilitate the installation and positioning of the outer ring fire cover on the base, and the two positioning protrusions are respectively provided close to the inner and outer walls of the outer ring fire cover, so that the two positioning protrusions are located exactly at the two side edges of the mixing chamber, so that positioning protrusion one and positioning protrusion two can also play a sealing role, effectively preventing the mixed gas in the mixing chamber from overflowing from the connection gap between the outer ring fire cover and the base, thereby improving the safety of use.

[0019] The present invention has the following beneficial effects due to the adoption of the above technical solution:

[0020] The structural design of the present invention is ingenious and reasonable, with strong practicality. It adopts the cooperation of the inner ring fire outlet hole and the outer ring fire outlet hole to form two gas airflows, enhance the mixing degree of gas and air, and improve the combustion efficiency of the burner. At the same time, two rings of inner and outer flames are formed on the outer ring fire cover, which improves the thermal efficiency of the burner. The inner ring fire outlet hole is arranged in groove one, and the outer ring fire outlet hole is arranged in groove two. The design of the groove can increase the flame area at the fire outlet hole, making it less likely for flame separation to occur, and making the combustion more complete. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings:

[0022] Figure 1 This is a structural schematic diagram of a burner of the present invention;

[0023] Figure 2 Schematic diagram of the structure of the outer ring fire cover in the present invention;

[0024] Figure 3 Schematic diagram of the position distribution structure of the groove group 1 on the outer ring fire cover in the present invention;

[0025] Figure 4 Schematic diagram of the position distribution structure of the inner ring fire outlet holes in groove 1 in the present invention;

[0026] Figure 5 This is a schematic diagram of the position distribution structure of the outer ring fire holes in the groove 2 in the present invention;

[0027] Figure 6 Schematic diagram of the bottom structure of the outer ring fire cover in the present invention;

[0028] Figure 7 Schematic diagram of the position distribution structure of the reinforcing protrusions in the gas mixing chamber of the present invention;

[0029] Figure 8This is a structural diagram of the inner ring fire outlet hole penetrating the corresponding reinforcement protrusion in the present invention.

[0030] In the figure: 1-burner head; 2-base; 3-outer ring fire cover; 4-inner ring fire cover; 5-top wall; 6-outer side wall; 7-inner side wall; 8-inner bevel; 9-groove group one; 10-inner ring fire hole; 11-outer bevel; 12-groove group two; 13-fire transfer groove; 14-gas mixing chamber; 15-reinforcement protrusion; 16-guide groove; 17-fire transfer hole; 18-outer ring fire hole one; 19-outer ring fire hole two; 20-positioning convex ring one; 21-positioning convex ring two; 22-burn-proof area; 23-groove one; 24-groove two. DETAILED DESCRIPTION

[0031] like Figures 1 to 8 Figure 1 shows a burner according to the present invention, comprising a burner head 1, a base 2, and a fire distribution cover. The base 2 is provided on the burner head 1, and the fire distribution cover is provided on the base 2. The fire distribution cover comprises an outer ring fire cover 3 and an inner ring fire cover 4. The outer ring fire cover 3 comprises a top wall 5, an inner side wall 7, and an outer side wall 6. An inner inclined surface 8 is connected between the top wall 5 and the inner side wall 7. A groove group 9 is provided on the inner inclined surface 8. The groove group 9 comprises at least one groove 23. An inner ring fire hole 10 is provided in the groove 23.

[0032] An outer bevel 11 is connected between the top wall 5 and the outer side wall 6. A second groove group 12 is provided on the outer bevel 11. The second groove group 12 includes at least one second groove 24. An outer ring fire hole is provided in the second groove 24.

[0033] The inner ring fire outlet holes 10 are coordinated with the outer ring fire outlet holes to form two gas streams, thereby enhancing the mixing degree of gas and air and improving the combustion efficiency of the burner. At the same time, two inner and outer ring flames are formed on the outer ring fire cover 3, thereby improving the thermal efficiency of the burner. The inner ring fire outlet holes 10 are arranged in the first groove 23, and the outer ring fire outlet holes are arranged in the second groove 24. The design of the grooves can increase the flame area at the fire outlet holes, making it less likely for flame separation to occur, and the flame formation is more stable, thereby effectively improving the combustion thermal efficiency and energy efficiency.

[0034] A fire transfer groove 13 is provided on the outer ring fire cover 3. The fire transfer groove 13 is used to conduct the flame to the outer ring fire hole. The fire transfer groove 13 is provided on the surface of the outer ring fire cover 3, shortening the communication path between the inner ring fire hole 10 and the outer ring fire hole, which is more conducive to the transmission of the inner flame to the outer flame, improves the reliability of flame transmission, and makes the flame transmission effect good, fast and short. The cross-section of the inner ring fire hole 10 and the outer ring fire hole can be circular, polygonal or irregular.

[0035] At least two groove groups 1 9 are provided, with several groove groups 1 9 distributed circumferentially along the inner bevel 8. The groove groups 1 9 are preferably evenly distributed circumferentially on the inner bevel 8, ensuring uniformity in the layout of the inner ring of fire holes 10, thereby forming a stable inner ring flame and achieving uniform heating. At least two groove groups 2 12 are provided, with several groove groups 2 12 distributed circumferentially along the outer bevel 11. The groove groups 2 12 are preferably evenly distributed circumferentially on the outer bevel 11, ensuring uniformity in the layout of the outer ring of fire holes, thereby forming a stable outer ring flame and achieving uniform heating. A burn-proof zone 22 is formed between adjacent groove groups 2 12, allowing the outer flame to avoid the pot support, thereby preventing burns on the pot claws of the pot support, reducing heat loss, and lowering the carbon monoxide content in the combustion products.

[0036] The outer wall 6, the outer bevel 11, the top wall 5, the inner bevel 8 and the inner side wall 7 are connected in sequence to form a mixing chamber 14 at the bottom of the outer ring fire cover 3. The inner ring fire hole 10 and the outer ring fire hole are connected to the mixing chamber 14. A reinforcing protrusion 15 is provided in the mixing chamber 14. The inner ring fire hole 10 passes through the reinforcing protrusion 15. The gas and air are mixed in the mixing chamber 14 and buffered in the mixing chamber 14. The inner ring fire hole 10 and the outer ring fire hole are connected to the mixing chamber 14 so that the mixed gas in the mixing chamber 14 can enter the inner ring fire hole 10 and the outer ring fire hole. The design of the reinforcing protrusion 15 can enhance the overall structural strength of the outer ring fire cover 3, improve the quality of the outer ring fire cover 3, and extend the service life of the outer ring fire cover 3. The inner ring fire hole 10 just passes through the reinforcing protrusion 15, so that the outer ring fire cover 3 is not easy to break when the inner ring fire hole 10 is processed, thereby facilitating the processing and manufacturing of the outer ring fire cover 3.

[0037] The reinforcing protrusions 15 are distributed circumferentially along the mixing chamber 14, and a guide groove 16 is formed between two adjacent reinforcing protrusions 15. The reinforcing protrusions 15 are distributed circumferentially in the mixing chamber 14, and the reinforcing protrusions 15 are preferably arranged to be uniformly distributed circumferentially in the mixing chamber 14, thereby improving the structural stability and firmness of the entire outer ring fire cover 3, and guide grooves 16 are formed between adjacent reinforcing protrusions 15. The guide grooves 16 can be used to more conveniently guide the gas to the outer ring fire outlet, thereby improving the combustion efficiency of the outer ring fire cover 3 and also playing a role in stabilizing the fire.

[0038] The inner bevel 8 extends downward from the inner edge of the top wall 5 to the inner side wall 7, and the inner bevel 8 is set downwardly toward the center of the outer ring fire cover 3. The outer bevel 11 extends downwardly from the outer edge of the top wall 5 to the outer side wall 6, and the outer bevel is set downwardly away from the center of the outer ring fire cover 3. The inner bevel 8 and the outer bevel 11 are straight bevels or curved bevels, and the design is simple and reasonable. The inner bevel 8 and the outer bevel 11 can be adjusted to straight bevels or curved bevels according to actual design requirements. The outer bevel 11 adopts a bevel design to guide the secondary air well, reduce the smoke generated at the outer ring fire hole, and improve the combustion efficiency. In the present application, the inner bevel 8 is preferably designed as a curved bevel to ensure the energy gathering effect on the inner side of the outer ring fire cover 3. The inner bevel 8 and the outer bevel 11 are not limited to straight bevels or curved bevels, and can also be a combination of straight lines and curves.

[0039] Fire transfer holes 17 are provided on both sides of the fire transfer groove 13, and the groove 23 adjacent to the fire transfer hole 17 is a blind groove. The groove 23 adjacent to the fire transfer hole 17 is a blind groove design, and the inner ring fire outlet hole 10 is not provided on the groove 23, thereby improving the structural strength of the outer ring fire cover 3 where the fire transfer groove 13 and the fire transfer hole 17 are provided, and extending the service life of the outer ring fire cover 3. The fire transfer holes 17 are provided on both sides of the fire transfer groove 13, and the fire transfer holes 17 are preferably symmetrically provided on both sides of the fire transfer groove 13, so that the gas formed above the end of the fire transfer groove 13 has a steady flow, thereby making the flame combustion more stable and improving the flame quality, and the fire transfer hole 17 is provided close to the inner side wall 7 of the outer ring fire cover 3, so that the fire transfer groove 13 can transfer the flame at the fire transfer hole 17 to the outside of the outer ring fire cover 3, ignite the outer ring fire outlet hole, and make the flame transfer more stable and reliable.

[0040] The outer ring fire hole is tilted on the outer inclined surface 11, and the outer ring fire hole is tilted downward from the outside of the outer ring fire cover 3 to the mixing chamber 14. The design is ingenious and reasonable. This design makes the end of the outer ring fire hole connected to the mixing chamber 14 lower than the flame outlet end of the outer ring fire hole, so that it is roughly the same as the direction of upward transmission of the gas, which is more conducive to the transmission of gas into the outer ring fire hole, making the flame conduction more reliable.

[0041] The outer ring fire holes include outer ring fire hole 18 and outer ring fire hole 2 19. The diameter of outer ring fire hole 18 is larger than the diameter of outer ring fire hole 2 19. Outer ring fire hole 18 and outer ring fire hole 2 19 are distributed up and down in groove 2 24. The design is reasonable. The outer ring fire holes adopt the design of outer ring fire hole 18 and outer ring fire hole 2 19, so that two rows of outer ring fire holes are formed on the outside of the outer ring fire cover 3. At the same time, since the diameter of outer ring fire hole 18 is larger than the diameter of outer ring fire hole 2 19, the upper outer ring fire hole 18 is the main combustion fire hole, and the lower outer ring fire hole 2 19 is the main flame stabilization fire hole, thereby making the outer flame more stable. Outer ring fire hole 18 and outer ring fire hole 2 19 can be distributed symmetrically up and down, or they can be staggered up and down.

[0042] A positioning convex ring is provided at the bottom of the outer ring fire cover 3, and the positioning convex ring includes a positioning convex ring 1 20 and a positioning convex ring 21. The positioning convex ring 1 20 is arranged close to the outer wall 6 of the outer ring fire cover 3, and the positioning convex ring 2 21 is arranged close to the inner wall 7 of the outer ring fire cover 3. The positioning convex ring 1 20 and the positioning convex ring 2 21 can cooperate with the base 2 to facilitate the installation and positioning of the outer ring fire cover 3 on the base 2, and the two positioning convex rings are respectively arranged close to the inner and outer walls 6 of the outer ring fire cover 3, so that the two positioning convex rings are located exactly at the two side edges of the mixing chamber 14, so that the positioning convex ring 1 20 and the positioning convex ring 2 21 can also play a sealing role, effectively preventing the mixed gas in the mixing chamber 14 from overflowing from the connection gap between the outer ring fire cover 3 and the base 2, thereby improving the safety of use.

[0043] The structural design of the present invention is ingenious and reasonable, with strong practicality. The inner ring fire outlet hole 10 and the outer ring fire outlet hole are combined to form two gas airflows, enhance the mixing degree of gas and air, and improve the combustion efficiency of the burner. At the same time, two inner and outer ring flames are formed on the outer ring fire cover, thereby improving the thermal efficiency of the burner. The inner ring fire outlet hole 10 is arranged in groove one 23, and the outer ring fire outlet hole is arranged in groove two 24. The design of the groove can increase the flame area at the fire outlet hole, making it less likely for flame separation to occur, and making the combustion more complete.

[0044] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements, or modifications based on the present invention to achieve substantially the same technical effects are all within the scope of protection of the present invention.

Claims

1. A burner comprising: stove top; A base, the base being arranged on the burner; A fire separation cover is provided on the base, and includes an outer ring fire cover and an inner ring fire cover; Its characteristics are: The outer ring fire cover includes a top wall, an inner side wall and an outer side wall, an inner bevel is connected between the top wall and the inner side wall, a groove group 1 is provided on the inner bevel, the groove group 1 includes at least one groove 1, and an inner ring fire hole is provided in the groove 1; An outer slope is connected between the top wall and the outer side wall, and a second groove group is provided on the outer slope. The second groove group includes at least one second groove, and an outer ring fire hole is provided in the second groove. The outer ring fire cover is provided with a fire transfer groove, which is used to transfer flames to the outer ring fire outlet hole; fire transfer holes are provided on both sides of the fire transfer groove, and the groove adjacent to the fire transfer hole is a blind groove; The outer side wall, the outer inclined surface, the top wall, the inner inclined surface, and the inner side wall are sequentially connected to form an air mixing chamber at the bottom of the outer ring fire cover. The inner ring fire outlet holes and the outer ring fire outlet holes are both connected to the air mixing chamber. A reinforcement protrusion is provided in the air mixing chamber. The inner ring fire outlet holes penetrate the reinforcement protrusion. The reinforcement protrusions are distributed along the circumference of the air mixing chamber, and a guide groove is formed between two adjacent reinforcement protrusions. A positioning protrusion is provided at the bottom of the outer ring fire cover, and the positioning protrusion includes positioning protrusion one and positioning protrusion two. Positioning protrusion one is provided close to the outer side wall of the outer ring fire cover, and positioning protrusion two is provided close to the inner side wall of the outer ring fire cover.

2. A burner according to claim 1, characterized in that: At least two groove groups are provided, and a plurality of groove groups are distributed along the circumference of the inner inclined surface.

3. A burner according to claim 1, characterized in that: There are at least two second groove groups, and several second groove groups are distributed along the circumference of the outer inclined surface.

4. A burner according to claim 1, characterized in that: The inner bevel extends downward from the inner edge of the top wall to the inner side wall, and the outer bevel extends downward from the outer edge of the top wall to the outer side wall. The inner bevel and the outer bevel are straight bevels or curved bevels.

5. The burner according to claim 1, characterized in that: The outer ring fire outlet holes are obliquely arranged on the outer inclined surface, and the outer ring fire outlet holes are obliquely arranged downward from the outer side of the outer ring fire cover toward the gas mixing chamber.

6. A burner according to claim 1, characterized in that: The outer ring fire holes include outer ring fire hole 1 and outer ring fire hole 2. The diameter of outer ring fire hole 1 is larger than the diameter of outer ring fire hole 2. The outer ring fire hole 1 and the outer ring fire hole 2 are distributed up and down in the groove 2.

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