CN219222506U

CN219222506U - Stove burner

Info

Publication number: CN219222506U
Application number: CN202223543671.1U
Authority: CN
Inventors: 蔡明滔; 左尧明
Original assignee: Guangdong Sijifu Gas Appliance Co ltd
Current assignee: Guangdong Sijifu Gas Appliance Co ltd
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-06-20
Anticipated expiration: 2032-12-27

Abstract

The utility model discloses a stove burner, which relates to a stove and aims at solving the problems of higher manufacturing difficulty and higher cost of a valve core in the technical scheme of synchronously adjusting internal and external ring fires, and the technical scheme is characterized in that: the stove burner comprises a base, an outer fire cover, a central fire cover, a first vent pipe and a second vent pipe, wherein the base is provided with an air guide outer ring; the base is provided with an air guide inner ring, the second air vent pipe is communicated with the air guide inner ring, and the central fire cover comprises an inner ring fire part; the base is provided with central air flue, is provided with between gas guide outer ring and the central air flue and connects the flat air flue intercommunication, connects the flat air flue to keep apart and runs through gas guide inner ring, and the center fire lid still includes center fire portion. The kitchen range burner can realize synchronous adjustment of the central flame and the external flame on the structure of the conventional product, improves the uniformity of the flame, and has simple structure and lower cost.

Description

Stove burner

Technical Field

The present utility model relates to cooktops, and more particularly, to a cooktop burner.

Background

The existing kitchen range burner is usually controlled by double air passages, namely, the outer ring fire and the central fire are respectively supplied by special air passages.

A stove burner and a stove as disclosed in Chinese patent publication No. CN212565880U, which are technically characterized in that: the stove burner comprises: the burner comprises a burner base, a burner cover and a burner cover, wherein a first vent hole is formed in the middle of the burner base, an air guide groove is formed in the top of the burner base, the air guide groove is annularly arranged on the periphery of the first vent hole, and a second vent hole communicated with the air guide groove is formed in the burner base; the gas outlet end of the inner ring gas injection pipe is inserted into the first vent hole; the air outlet end of the outer ring gas injection pipe is inserted into the second ventilation hole; an outer ring fire cover which is arranged on the air guide groove; the inner ring fire cover is arranged on the first vent hole, and is provided with a plurality of gas outlet holes with gas outlet ends positioned at the top of the inner ring fire cover and spraying fuel gas only in the vertical direction.

According to the technical scheme, the valve core of the valve body is used for controlling the sizes of the outer ring fire and the central fire; however, the combustion system with the structure on the market generally has the problem that internal and external ring fires cannot be synchronously regulated, so that the temperature uniformity of the bottom of the cooker is poor when a user actually cooks.

In order to solve the above problems, the technical solutions currently on the market include: (1) synchronous adjustment is realized by optimizing the structure of the valve core, but the valve core of the scheme has higher manufacturing difficulty and lower manufacturability; (2) the three-ring fire burner is matched with the three-way valve body to realize uniform distribution adjustment of firepower, but the cost of the scheme is higher.

In summary, the technical scheme of synchronously adjusting the internal and external ring fires in the prior art has the problems of higher manufacturing difficulty and higher cost of the valve core; there is therefore a need to propose a new solution to this problem.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model aims to provide a kitchen range burner which can realize synchronous adjustment of central flame and external flame on the structure of the conventional product, improves the uniformity of flame, and has simple structure and lower cost.

The technical aim of the utility model is realized by the following technical scheme: the stove burner comprises a base, an outer fire cover, a central fire cover, a first vent pipe and a second vent pipe, wherein the base is provided with an air guide outer ring, the first vent pipe is communicated with the air guide outer ring, and the outer fire cover is covered at the top end of the air guide outer ring; the base is provided with an air guide inner ring, the second ventilation pipe is communicated with the air guide inner ring, the central fire cover comprises an inner ring fire part, and the inner ring fire part is covered at the top end of the air guide inner ring; the base is provided with central air flue, be provided with the connection flat air flue intercommunication between air guide outer ring and the central air flue, connect flat air flue to keep apart and run through the air guide inner ring, the center fire lid still includes center fire portion, center fire portion cover locates the top of central air flue.

By adopting the technical scheme, after the fuel entering the base through the first vent pipe is diffused, one part of the fuel enters the air guide outer ring, and the other part of the fuel enters the central air passage through the connecting flat air passage, so that the fuel of the outer ring fire and the central fire is supplied by the first vent pipe, and after the fuel is ignited, the fuel forms the outer ring fire and the central fire through the central fire parts of the outer fire cover and the central fire cover respectively, and the synchronous regulation of the outer ring fire and the central fire can be realized only by regulating the ventilation quantity of the first vent pipe; the fuel entering the base through the second vent pipe directly enters the air guide inner ring, the fuel of the air guide inner ring is sprayed out through the inner ring flame part and is ignited to form inner ring flame, and the central flame is combined, so that the central flame is covered with two areas of flame distribution, one area of the flame distribution is synchronously controlled with the outer ring flame and is distributed at the central position of the central flame cover, the firepower is enhanced in the maximum flame state, the thermal efficiency is improved, and meanwhile, the flame distribution can be synchronously reduced with the outer ring flame when the firepower is adjusted, and the temperature uniformity of the pot bottom is improved; by adopting the structure, the synchronous regulation of the central flame and the external flame can be realized on the structure of the conventional product, the uniformity of the flame is improved, and the structure is simple and the cost is lower.

The utility model is further provided with: the base is provided with the drain pan that communicates with first breather pipe, drain pan upper end opening cover is equipped with the annular plate, drain pan and annular plate cooperation form the gas accumulation chamber, the gas accumulation chamber equidistant a plurality of connection vertical air flue that are provided with, connect vertical air flue top and air guide outer loop intercommunication, connect flat air flue and gas accumulation chamber intercommunication.

The utility model is further provided with: the center of drain pan and annular slab is provided with the inner ring double-walled that the cross-section is the U-shaped, inner ring double-walled forms the air guide inner ring, the second vent pipe is provided with keeps apart the air cavity and communicates with the air guide inner ring, the inner circumference of inner ring double-walled is provided with the center bottom plate, center bottom plate cooperation inner ring double-walled forms upper end open-ended center air flue.

The utility model is further provided with: the inner ring double-wall and the air guide outer ring are matched on the annular plate to form a combustion oxygen supply annular cavity, a horizontal oxygen supply through groove is formed between the adjacent connecting vertical air passages, and the horizontal oxygen supply through groove is communicated with the combustion oxygen supply annular cavity.

The utility model is further provided with: the annular plate is provided with a first vertical insertion pipe and a second vertical insertion pipe in the area of the combustion oxygen supply annular cavity, and the first vertical insertion pipe and the second vertical insertion pipe are respectively inserted with a thermocouple and an ignition needle.

The utility model is further provided with: the cross section of the outer fire cover is U-shaped, the back-off cover is arranged on the air guide outer ring, a plurality of fine-hole diameter through hole groups and a plurality of coarse-hole diameter through hole groups are arranged on the outer vertical annular wall of the outer fire cover, and the fine-hole diameter through hole groups and the coarse-hole diameter through hole groups are alternately arranged at equal intervals.

The utility model is further provided with: the outer vertical annular wall of the outer fire cover is provided with flame stabilizing annular grooves below the fine hole diameter through hole group and the coarse hole diameter through hole group, and the flame stabilizing annular grooves are provided with flame stabilizing through holes at equal angles.

The utility model is further provided with: the inner annular wall of the outer fire cover is provided with a plurality of outer flame ignition holes, and an outer flame ignition groove is arranged between the outer flame ignition holes and the holes of the through hole group with any coarse pore diameter.

The utility model is further provided with: the inner ring fire part is L-shaped and is fastened to the air guide inner ring, a plurality of inner ring fire through holes are formed in the vertical annular wall of the inner ring fire part at equal intervals, inner flame stabilizing through holes are formed in the horizontal annular plate part of the inner ring fire part at equal intervals, an inner flame stabilizing annular wing is arranged on the inner ring fire part in a central fire cover mode, and an inner flame stabilizing groove is formed in the inner flame stabilizing annular wing and the horizontal annular plate part of the inner ring fire part in a matched mode.

The utility model is further provided with: the central fire part is provided with an inserting section which is in inserting fit with the central air passage, the inserting section is provided with a positioning lug, and the inner wall of the central air passage is provided with a positioning groove for the positioning lug to be embedded; the central fire part vertically penetrates through a plurality of central fire through holes.

In summary, the utility model has the following beneficial effects: the synchronous regulation of the external ring fire and the central fire can be realized only by regulating the ventilation quantity of the first ventilation pipe; the central fire cover is provided with two areas of flame distribution, one area of the central fire cover is synchronously controlled with the outer ring fire, and the central fire cover is distributed at the central position of the central fire cover, so that the fire power is enhanced in the maximum fire state, the heat efficiency is improved, the central fire cover can be synchronously reduced with the outer ring fire when the fire power is reduced, and the temperature uniformity of the bottom of a pot is improved; the synchronous regulation of the central flame and the external flame can be realized on the structure of the conventional product, the uniformity of the flame is improved, the structure is simple, and the cost is lower; after the fuel entering the base through the first vent pipe is filled with the air accumulating cavity, the fuel enters the air guide outer ring through a plurality of connecting vertical air passages distributed at equal intervals, so that the uniformity of the fuel quantity in the whole circumferential area of the air guide outer ring is effectively ensured; the bottom shell can simultaneously form the air guide inner ring and the central air passage by the double walls of the inner ring and the central bottom plate, so that the production cost for arranging the air guide inner ring and the central air passage is effectively reduced; the combustion oxygen supply annular cavity and the horizontal oxygen supply through groove are additionally arranged, so that an oxygen deficiency area is effectively prevented from being formed in the annular ring due to the combustion of the outer annular fire, and the combustion sufficiency of the inner annular fire and the central fire is effectively improved; through the alternate arrangement of the through holes with the thin pore diameter and the thick pore diameter, the outer ring fire can still keep a complete annular flame after the fuel supply is reduced; a complete annular fuel supply space is formed, thereby ensuring the annular flame stability of the outer annular fire.

Drawings

FIG. 1 is a schematic overall structure of the present application;

FIG. 2 is a partial cutaway perspective view of the present application;

FIG. 3 is a half cross-sectional view of the present application, primarily illustrating the fuel path of the second vent tube;

FIG. 4 is a half cross-sectional view of another view of the present application, primarily illustrating the fuel routing of the first vent tube;

FIG. 5 is a schematic view of the overall structure of the outer fire cover of the present application;

FIG. 6 is a partial cross-sectional view of an outer fire cover of the present application;

FIG. 7 is a schematic view of the structure of the base of the present application;

FIG. 8 is a schematic view of the structure of the center fire cover of the present application;

fig. 9 is a partial cross-sectional view of a center fire cover of the present application.

Description of the drawings: 1. a base; 2. an outer fire cover; 3. a center fire cover; 4. a first vent pipe; 5. a second vent pipe; 6. an air guide outer ring; 7. an air guide inner ring; 8. an inner ring fire part; 9. a central airway; 10. connecting a flat air passage; 11. a central fire portion; 12. a bottom case; 13. a ring plate; 14. an air accumulation cavity; 15. connecting with a vertical air passage; 16. an inner ring double wall; 17. isolating the air cavity; 18. a central base plate; 19. a combustion oxygen supply annular chamber; 20. a horizontal oxygen supply through groove; 21. a first vertical cannula; 22. a second vertical cannula; 23. a thermocouple; 24. an ignition needle; 25. a group of fine-bore through-holes; 26. a coarse-bore group of through-holes; 27. flame stabilizing ring groove; 28. flame stabilizing through holes; 29. an outer flame ignition hole; 30. an outer flame guide groove; 31. an inner annular fire through hole; 32. an inner flame stabilizing through hole; 33. inner flame stabilizing ring wings; 34. an inner flame stabilizing groove; 35. a plug section; 36. positioning the protruding blocks; 37. a positioning groove; 38. and a central fire through hole.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings.

The stove burner is shown in fig. 1 and 2, and comprises a base 1, an outer fire cover 2, a central fire cover 3, a first ventilation pipe 4 and a second ventilation pipe 5, wherein the base 1 is provided with an air guide outer ring 6, the first ventilation pipe 4 is communicated with the air guide outer ring 6, and the outer fire cover 2 is covered at the top end of the air guide outer ring 6; the base 1 is provided with an air guide inner ring 7, the second ventilation pipe 5 is communicated with the air guide inner ring 7, the central fire cover 3 comprises an inner ring fire part 8, and the inner ring fire part 8 is covered at the top end of the air guide inner ring 7; the base 1 is provided with a central air passage 9, a connecting flat air passage 10 is arranged between the air guide outer ring 6 and the central air passage 9 and communicated with the air guide inner ring 7, the connecting flat air passage 10 is isolated and penetrates through the air guide inner ring 7, the central fire cover 3 further comprises a central fire part 11, and the central fire part 11 is covered at the top end of the central air passage 9.

In practical use, as shown in fig. 3 and 4, a part of fuel entering the base 1 through the first vent pipe 4 enters the air guide outer ring 6 after being diffused, and the other part enters the central air passage 9 through the connecting flat air passage 10, so that the fuel of outer ring fire and central fire is supplied by the first vent pipe 4, and is sprayed and ignited through the central fire parts 11 of the outer fire cover 2 and the central fire cover 3 respectively to form the outer ring fire and the central fire, and synchronous regulation of the outer ring fire and the central fire can be realized only by regulating the ventilation quantity of the first vent pipe 4; the fuel entering the base 1 through the second vent pipe 5 directly enters the air guide inner ring 7, the fuel of the air guide inner ring 7 is sprayed out through the inner ring fire part 8 and is ignited to form inner ring fire, and the inner ring fire is combined with the central fire, so that the central fire cover 3 has flame distribution in two areas, one area is synchronously controlled with the outer ring fire and is distributed at the central position of the central fire cover 3, the fire power is enhanced in the maximum fire state, the heat efficiency is improved, the fire power can be synchronously reduced with the outer ring fire when the fire power is reduced, and the temperature uniformity of the pot bottom is improved; by adopting the structure, the synchronous regulation of the central flame and the external flame can be realized on the structure of the conventional product, the uniformity of the flame is improved, and the structure is simple and the cost is lower.

The first ventilation pipe 4 is communicated with the air guide outer ring 6 in the following way, as shown in fig. 2, 4 and 7, the base 1 is integrally formed with a bottom shell 12 communicated with the first ventilation pipe 4, an opening at the upper end of the bottom shell 12 is integrally covered with a ring plate 13, the bottom shell 12 and the ring plate 13 are matched to form an air accumulating cavity 14, the air accumulating cavity 14 is uniformly and integrally formed with a plurality of connecting vertical air passages 15 at equal intervals, the top ends of the connecting vertical air passages 15 are communicated with the air guide outer ring 6, and the connecting horizontal air passages 10 are communicated with the air accumulating cavity 14; after the air cavity 14 is filled with the fuel entering the base 1 through the first vent pipe 4, the fuel enters the air guide outer ring 6 through a plurality of connecting vertical air passages 15 distributed at equal intervals, and compared with the fuel entering the air guide outer ring 6 directly, the uniformity of the fuel quantity in the whole circumferential area of the air guide outer ring 6 is effectively ensured.

The bottom shell 12 is provided with an air guide inner ring 7 and a central air passage 9 in a manner that, as shown in fig. 2 and 3, the centers of the bottom shell 12 and the annular plate 13 are integrally formed with an inner ring double wall 16 with a U-shaped section, the inner ring double wall 16 forms the air guide inner ring 7, the second air passage 5 is provided with an isolation air cavity 17 communicated with the air guide inner ring 7, the inner circumferential surface of the inner ring double wall 16 is provided with a central bottom plate 18, and the central bottom plate 18 is matched with the inner ring double wall 16 to form the central air passage 9 with an upper end opening; the bottom shell 12 can simultaneously form the air guide inner ring 7 and the central air passage 9 through the inner ring double wall 16 and the central bottom plate 18, so that the production cost for arranging the air guide inner ring 7 and the central air passage 9 is effectively reduced.

In order to ensure the full combustion of the inner ring fire and the central fire, as shown in fig. 1, 2 and 3, the inner ring double wall 16 and the air guide outer ring 6 are matched on the ring plate 13 to form a combustion oxygen supply ring cavity 19, a horizontal oxygen supply through groove 20 is formed between adjacent connecting vertical air passages 15, and the horizontal oxygen supply through groove 20 is communicated with the combustion oxygen supply ring cavity 19; when the inner ring fire and the central fire burn, a negative pressure area is formed in the combustion oxygen supply annular cavity 19, so that external air enters the negative pressure area through the horizontal oxygen supply through groove 20, and oxygen required for burning is continuously supplied to the inner ring fire and the central fire, so that oxygen deficiency areas in the inner ring and the central fire caused by burning of the outer ring fire are effectively prevented, and the burning sufficiency of the inner ring fire and the central fire is effectively improved.

As shown in fig. 1 and 2, the ring plate 13 is integrally formed with a first vertical insertion tube 21 and a second vertical insertion tube 22 in the area of the combustion oxygen supply ring cavity 19, and the first vertical insertion tube 21 and the second vertical insertion tube 22 are respectively inserted with a thermocouple 23 and an ignition needle 24; the installation of the thermocouple 23 and the ignition needle 24 is ensured by the first vertical cannula 21 and the second vertical cannula 22, and the assembly is simple and convenient.

Because the combustion area of the outer ring fire is larger, and the first ventilation pipe 4 is required to supply fuel for the central fire additionally, the problem of insufficient fuel supply of the outer ring fire may exist, as shown in fig. 5, the cross section of the outer fire cover 2 is in a U shape, the reverse buckle is covered on the air guide outer ring 6, the outer vertical annular wall of the outer fire cover 2 is provided with a plurality of fine hole diameter through hole groups 25 and a plurality of coarse hole diameter through hole groups 26, and the fine hole diameter through hole groups 25 and the coarse hole diameter through hole groups 26 are alternately arranged at equal intervals; thus, through the alternate arrangement of the through holes with the fine pore diameter and the coarse pore diameter, the outer ring fire can still maintain the complete annular flame after the fuel supply is reduced.

In order to ensure the annular flame stability of the outer ring fire, as shown in fig. 5 and 6, a flame stabilizing ring groove 27 is arranged below the fine hole diameter through hole group 25 and the coarse hole diameter through hole group 26 on the outer vertical ring wall of the outer fire cover 2, and flame stabilizing through holes 28 are arranged at equal angles on the flame stabilizing ring groove 27; the fuel enters the flame stabilizing ring groove 27 through the flame stabilizing through holes 28 and is diffused in the flame stabilizing ring groove 27, so that a complete annular fuel supply space is formed, and the annular flame stability of the outer annular flame is ensured.

The fine hole diameter through hole group 25 and the coarse hole diameter through hole group 26 of the outer fire cover 2 are arranged on the outer vertical annular wall, so that the combustion area of the outer annular fire is improved, but the problem of difficult ignition exists, for this purpose, as shown in fig. 6, the inner annular wall of the outer fire cover 2 is provided with a plurality of outer flame ignition holes 29, and an outer flame ignition groove 30 is arranged between the outer flame ignition holes 29 and the holes of any coarse hole diameter through hole group 26; the ignition needle 24 is thus adapted to ignite the fuel injected from the outer flame ignition hole 29 at the time of ignition, and to ignite the fuel injected from the fine hole group 25 and the coarse hole group 26 after guiding the flame through the outer flame ignition groove 30, thereby effectively eliminating the problem that the outer ring flame is not easy to ignite.

In order to ensure the annular flame stability of the inner annular flame, as shown in fig. 8 and 9, the inner annular flame part 8 is L-shaped and is fastened to the air guide inner ring 7, a plurality of inner annular flame through holes 31 are formed in the vertical annular wall of the inner annular flame part 8 at equal intervals, inner flame stabilizing through holes 32 are formed in the horizontal annular plate part of the inner annular flame part 8 at equal intervals, an inner flame stabilizing annular wing 33 is integrally formed on the inner annular flame part 8 by the central flame cover 3, and an inner flame stabilizing groove 34 is formed by matching the inner flame stabilizing annular wing 33 with the horizontal annular plate part of the inner annular flame part 8; the fuel of the inner ring fire is mainly supplied by the inner ring fire through holes 31, and the inner flame stabilizing ring wings 33 and the inner flame stabilizing through holes 32 are matched to form annular flame stabilizing fires, so that the stability of the annular flame of the inner ring fire is effectively ensured by combining the technical effects.

In order to avoid the mutual connection of the fuels of the central fire and the inner ring fire, as shown in fig. 7 and 8, the central fire part 11 is integrally formed with a plug-in section 35, and the plug-in section 35 is in plug-in fit with the central air passage 9, so that the connection tightness of the central fire part 11 and the central air passage 9 is improved, and the fuels of the air guide inner ring 7 and the central air passage 9 are effectively isolated.

In order to ensure the assembly precision of the central fire cover 3, as shown in fig. 7 and 8, the insertion section 35 is integrally formed with a positioning projection 36, and the inner wall of the central air flue 9 is formed with a positioning groove 37 for the positioning projection 36 to be embedded, so that the positioning projection 36 and the positioning groove 37 are matched to realize the positioning of the central fire cover 3 and effectively ensure the assembly precision thereof.

As shown in fig. 8 and 9, the central flame portion 11 vertically penetrates through a plurality of central flame holes 38, and the fuel in the central air duct 9 is ejected from the central flame holes 38 and ignited to form a central flame.

The present utility model is not limited by the specific embodiments, and modifications can be made to the embodiments without creative contribution by those skilled in the art after reading the present specification, but are protected by patent laws within the scope of claims of the present utility model.

Claims

1. The utility model provides a cooking utensils combustor, includes base (1), outer fire lid (2), center fire lid (3), first breather pipe (4) to and second breather pipe (5), its characterized in that:

the base (1) is provided with an air guide outer ring (6), the first ventilation pipe (4) is communicated with the air guide outer ring (6), and the outer fire cover (2) is covered at the top end of the air guide outer ring (6);

the base (1) is provided with an air guide inner ring (7), the second ventilation pipe (5) is communicated with the air guide inner ring (7), the central fire cover (3) comprises an inner ring fire part (8), and the inner ring fire part (8) is covered at the top end of the air guide inner ring (7);

the base (1) is provided with a central air passage (9), a connecting flat air passage (10) is arranged between the air guide outer ring (6) and the central air passage (9) and communicated with each other, the connecting flat air passage (10) is isolated and penetrates through the air guide inner ring (7), the central fire cover (3) further comprises a central fire part (11), and the central fire part (11) is covered at the top end of the central air passage (9).

2. The cooktop burner of claim 1, wherein: the base (1) is provided with drain pan (12) with first breather pipe (4) intercommunication, drain pan (12) upper end opening cover is equipped with annular plate (13), drain pan (12) and annular plate (13) cooperation form gas accumulation chamber (14), gas accumulation chamber (14) equidistant a plurality of vertical air flue (15) of connection that are provided with, connect vertical air flue (15) top and air guide outer loop (6) intercommunication, connect flat air flue (10) and gas accumulation chamber (14) intercommunication.

3. The cooktop burner of claim 2, wherein: the center of drain pan (12) and annular slab (13) is provided with the interior ring double-walled (16) that the cross-section is the U-shaped, interior ring double-walled (16) form air guide inner ring (7), second vent pipe (5) are provided with isolation air cavity (17) and air guide inner ring (7) intercommunication, the inner circumference of interior ring double-walled (16) is provided with central bottom plate (18), central bottom plate (18) cooperation inner ring double-walled (16) form upper end open-ended central air flue (9).

4. A cooktop burner according to claim 3, characterized in that: the inner ring double-wall (16) and the air guide outer ring (6) are matched on the annular plate (13) to form a combustion oxygen supply annular cavity (19), a horizontal oxygen supply through groove (20) is formed between adjacent connecting vertical air passages (15), and the horizontal oxygen supply through groove (20) is communicated with the combustion oxygen supply annular cavity (19).

5. The cooktop burner of claim 4, wherein: the annular plate (13) is provided with a first vertical insertion pipe (21) and a second vertical insertion pipe (22) in the area of the combustion oxygen supply annular cavity (19), and the first vertical insertion pipe (21) and the second vertical insertion pipe (22) are respectively inserted with a thermocouple (23) and an ignition needle (24).

6. The cooktop burner of claim 1, wherein: the cross section of the outer fire cover (2) is U-shaped, the back-off cover is arranged on the air guide outer ring (6), a plurality of fine-aperture through hole groups (25) and a plurality of coarse-aperture through hole groups (26) are arranged on the outer vertical annular wall of the outer fire cover (2), and the fine-aperture through hole groups (25) and the coarse-aperture through hole groups (26) are alternately arranged at equal intervals.

7. The cooktop burner of claim 6, wherein: the outer vertical annular wall of the outer fire cover (2) is provided with flame stabilizing annular grooves (27) below the fine hole diameter through hole group (25) and the coarse hole diameter through hole group (26), and the flame stabilizing annular grooves (27) are provided with flame stabilizing through holes (28) at equal angles.

8. The cooktop burner of claim 6, wherein: the inner annular wall of the outer fire cover (2) is provided with a plurality of outer flame ignition holes (29), and an outer flame ignition groove (30) is arranged between the outer flame ignition holes (29) and the holes of any coarse-bore through hole group (26).

9. The cooktop burner of claim 1, wherein: the inner ring fire part (8) is L-shaped and is fastened to the air guide inner ring (7), a plurality of inner ring fire through holes (31) are formed in the vertical annular wall of the inner ring fire part (8) at equal intervals, inner flame stabilizing through holes (32) are formed in the horizontal annular plate part of the inner ring fire part (8) at equal intervals, an inner flame stabilizing annular wing (33) is arranged on the inner ring fire part (8) by the central fire cover (3), and an inner flame stabilizing groove (34) is formed by the inner flame stabilizing annular wing (33) and the horizontal annular plate part of the inner ring fire part (8) in a matched mode.

10. The cooktop burner of claim 1, wherein: the central fire part (11) is provided with a plug-in section (35), the plug-in section (35) is in plug-in fit with the central air passage (9), the plug-in section (35) is provided with a positioning lug (36), and the inner wall of the central air passage (9) is provided with a positioning groove (37) for the positioning lug (36) to be embedded; the central fire part (11) vertically penetrates through a plurality of central fire through holes (38).