Fire cover and combustor
By setting a secondary air intake hole in the middle of the fire cover in the burner and blocking it, combined with the brim of the hat to block the ignition needle, the problems of overflow accumulation and smoke emission are solved, and the burner design with easy cleaning and simple structure is realized.
Patent Information
- Application Number
- CN202422227644.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-11
AI Technical Summary
The secondary air passages of existing burners are prone to accumulation of overflow, resulting in difficulty in cleaning and difficulty in ignition smoke.
The first secondary air inlet hole of the inner fire cover is designed in the middle, and a cap is provided to cover the brim on the surrounding side of the inner fire cover, forming a secondary air outlet hole and ignition smoke exhaust channel to prevent overflow from entering the channel.
It realizes the easy cleaning and simple structure of the burner. The discharge is not easy to enter the ignition needle, the secondary air flows out smoothly, and the flue gas emission is smooth.
Smart Images
Figure CN223137884U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of kitchen appliances, in particular to a burner cap and a burner. Background Art
[0002] In order to supplement secondary air in the inner ring, a secondary air channel is arranged between inner-ring flame holes of the burners on the market. During cooking, the overflow liquid will flow from the secondary air channel to the liquid storage tray at the bottom of the burner head, resulting in more dirt accumulation at this place. Moreover, the existence of the secondary air channel will also bring many cleaning dead corners, which is not conducive to the user's disassembly and cleaning. If the secondary air channel between the inner and outer rings is sealed and the ignition needle is designed inside the burner, the flue gas generated by the combustion of the ignition hole will have the problem of difficult discharge.
[0003] Therefore, there is an urgent need for a burner cap to solve the above problems. Summary of the Utility Model
[0004] The utility model aims to solve at least one of the problems existing in the related art to a certain extent. For this purpose, the utility model provides a burner cap and a burner, which have the advantages of easy cleaning and simple structure.
[0005] The above object is achieved by the following technical solutions:
[0006] A burner cap includes:
[0007] An inner burner cap, including an inner burner cap body, a brim, inner flame holes, a first secondary air inlet hole, a cap, and an inner ring air groove. The brim is arranged on the outer peripheral side of the inner burner cap body. The inner burner cap body protrudes upward from the brim. The inner flame holes are arranged on the peripheral side of the inner burner cap body. The first secondary air inlet hole is arranged in the middle of the inner burner cap body. The cap is arranged on the upper side of the inner burner cap body and above the first secondary air inlet hole. A secondary air outlet hole communicating with the first secondary air inlet hole is formed between the cap and the inner burner cap body. The inner ring air groove is opened on the lower side of the inner burner cap body. The inner ring air groove communicates with the inner flame holes and is located outside the first secondary air inlet hole;
[0008] An outer burner cap, including an outer burner cap body, outer flame holes, a through hole, and an outer ring air groove. The outer flame holes are arranged on the peripheral side of the outer burner cap body. The through hole is opened in the middle of the outer burner cap body. The outer ring air groove is opened on the lower side of the outer burner cap body and communicates with the outer flame holes. The brim extends from the inside to the outside above the outer burner cap body. A gap is formed between the brim and the outer burner cap body to form an ignition flue gas discharge channel. The through hole communicates with the outside of the burner cap through the ignition flue gas discharge channel. A first ignition needle accommodation groove is formed between the inner ring air groove and the outer ring air groove and is located below the brim.
[0009] Optionally, the brim extends horizontally above the outer periphery of the outer burner cap body or protrudes from the outer periphery of the outer burner cap body.
[0010] Optionally, the inner fire holes are higher than the brim.
[0011] Optionally, the cap extends horizontally above the outer periphery of the inner burner cap body or protrudes from the outer periphery of the inner burner cap body.
[0012] Optionally, an outer ring flame transmission groove is formed on the lower side of the outer burner cap body. One end of the outer ring flame transmission groove communicates with the first ignition needle accommodation groove, and the other end communicates with the outside of the burner cap. Outer ring flame transmission holes communicating with the outer ring air groove are formed on the inner wall of the outer ring flame transmission groove.
[0013] Optionally, a first inner ring flame transmission hole communicating with the inner ring air groove is further formed on the inner wall of the first secondary air intake hole.
[0014] Optionally, a plurality of second inner ring flame transmission holes communicating with the inner ring air groove are further formed on the upper side of the inner burner cap body. The second inner ring flame transmission holes are arranged and extend from a position close to the first secondary air intake hole to a position close to the outer periphery of the inner burner cap body.
[0015] Optionally, a first inner ring flame transmission groove is further formed on the upper side of the inner burner cap body, and the second inner ring flame transmission holes are arranged in the first inner ring flame transmission groove.
[0016] Optionally, the inner burner cap is integrally formed, and the outer burner cap is integrally formed; or
[0017] The inner burner cap and the outer burner cap are integrally formed.
[0018] On the other hand, the present utility model provides a burner, which includes a burner head, an ignition needle and the above-mentioned burner cap. The burner head includes a burner head body, a convex portion protruding towards the middle of the burner head body. A second secondary air intake hole and a first inner flame-dividing hole located outside the second secondary air intake hole are formed on the convex portion. A first outer flame-dividing hole is further formed on the burner head body outside the first inner flame-dividing hole. A second ignition needle accommodating groove located above the burner head body is formed by an interval between the convex portion and the first outer flame-dividing hole. The second ignition needle accommodating groove communicates with the first ignition needle accommodating groove to form an ignition needle accommodating cavity. The first outer flame-dividing hole communicates with the outer ring air groove, and the first inner flame-dividing hole communicates with the inner ring air groove. A second inner ring flame-transfer groove communicating the second ignition needle accommodating groove with the second secondary air intake hole is formed on the lower side of the convex portion. A third inner ring flame-transfer hole communicating with the first inner flame-dividing hole is formed on the inner wall of the second inner ring flame-transfer groove. An ignition hole is formed on the outer peripheral side of the convex portion on one side of the second inner ring flame-transfer groove. The ignition needle is arranged in the ignition needle accommodating cavity.
[0019] Optionally, a fourth inner ring flame-transfer hole communicating with the first inner flame-dividing hole is formed on the inner wall of the second secondary air intake hole; and / or
[0020] A third inner ring flame-transfer groove extending from the outer peripheral side of the convex portion to the inner wall of the second secondary air intake hole is further formed on the inner wall of the second inner ring flame-transfer groove. The third inner ring flame-transfer groove communicates with the first inner flame-dividing hole.
[0021] Compared with the prior art, the present utility model has at least the following beneficial effects:
[0022] For the burner cap provided by the present utility model, by arranging the first secondary air intake hole in the middle of the inner burner cap and providing a cap to block the first secondary air intake hole, the overflow liquid during cooking will not enter the first secondary air intake hole, and the secondary air can flow out from the secondary air outlet hole after passing through the first secondary air intake hole to provide secondary air for the burner. By arranging a brim on the periphery of the inner burner cap body and arranging the ignition needle under the brim, the ignition needle is blocked by the brim, preventing the overflow liquid during cooking from flowing onto the ignition needle. The overflow liquid during the cooking process can only drip onto the cap and the brim and then flow to the outside of the burner cap. Therefore, the burner cap provided by the present utility model has the advantages of being easy to clean and having a simple structure. Description of the Drawings
[0023] Figure 1 is the front view of the burner cap provided by the specific embodiment of the present utility model;
[0024] Figure 2It is a three-dimensional structural schematic diagram of a burner cap provided by a specific embodiment of the present utility model;
[0025] Figure 3 It is Figure 1 one of the exploded views;
[0026] Figure 4 It is Figure 1 the second exploded view;
[0027] Figure 5 It is a three-dimensional structural schematic diagram of a burner provided by a specific embodiment of the present utility model;
[0028] Figure 6 It is Figure 5 the exploded view;
[0029] Figure 7 It is a three-dimensional structural schematic diagram of a flame distributor of a burner provided by a specific embodiment of the present utility model;
[0030] Figure 8 It is Figure 7 the top view;
[0031] Figure 9 It is Figure 5 the top view;
[0032] Figure 10 It is Figure 9 the cross-sectional view at B - B in
[0033] Figure 11 It is Figure 9 the cross-sectional view at A - A in
[0034] In the figure:
[0035] 1. Inner burner cap; 11. Inner burner cap body; 12. Brim; 13. Inner fire holes; 14. Cap; 141. Second support pillar; 15. First inner ring fire transfer groove; 151. Second inner ring fire transfer holes; 16. First inner ring fire transfer holes;
[0036] 2. Outer burner cap; 21. Outer burner cap body; 22. Outer fire holes; 23. Outer ring fire transfer groove; 24. Outer ring fire transfer holes; 25. Through hole;
[0037] 3. Flame distributor; 31. Flame distributor body; 32. Protrusion; 33. Second inner ring fire transfer groove; 34. Ignition holes; 35. Third inner ring fire transfer holes; 36. Fourth inner ring fire transfer holes; 37. Third inner ring fire transfer groove;
[0038] 4. Burner head; 41. Burner head body;
[0039] 5. Ignition needle;
[0040] 100. Secondary air passage; 101. First secondary air inlet hole; 102. Secondary air outlet hole; 103. Second secondary air inlet hole; 104. Third secondary air inlet hole; 200. Inner ring air supply passage; 201. Inner ring air groove; 202. First inner flame dividing hole; 203. Second inner flame dividing hole; 300. Outer ring air supply passage; 301. Outer ring air groove; 302. First outer flame dividing hole; 303. Second outer flame dividing hole;
[0041] 400. Ignition flue gas discharge passage;
[0042] 500. Ignition needle accommodation cavity; 501. First ignition needle accommodation groove; 502. Second ignition needle accommodation groove. Specific embodiments
[0043] The following embodiments are used to illustrate the present invention, but the present invention is not limited by these embodiments. Modifying the specific embodiments of the present invention or equivalently replacing some technical features without departing from the spirit of the present invention shall be covered within the scope of the technical solutions claimed by the present invention.
[0044] Please refer to Figures 1 - 11 , the present invention provides a burner cap, including an inner burner cap 1 and an outer burner cap 2. The inner burner cap 1 includes an inner burner cap body 11, a brim 12, inner flame holes 13, a first secondary air inlet hole 101, a cap 14, and an inner ring air groove 201. The brim 12 is arranged on the outer peripheral side of the inner burner cap body 11. The inner burner cap body 11 protrudes upward from the brim 12. The inner flame holes 13 are arranged on the periphery of the inner burner cap body 11. The first secondary air inlet hole 101 is arranged in the middle of the inner burner cap body 11. The cap 14 is arranged on the upper side of the inner burner cap body 11 and above the first secondary air inlet hole 101. A secondary air outlet hole 102 communicating with the first secondary air inlet hole 101 is formed between the cap 14 and the inner burner cap body 11. The inner ring air groove 201 is opened on the lower side of the inner burner cap body 11. The inner ring air groove 201 communicates with the inner flame holes 13 and is located outside the first secondary air inlet hole 101. The outer burner cap 2 includes an outer burner cap body 21, outer flame holes 22, a through hole 25, and an outer ring air groove 301. The outer flame holes 22 are arranged on the periphery of the outer burner cap body 21. The through hole 25 is opened in the middle of the outer burner cap body 21. The outer ring air groove 301 is opened on the lower side of the outer burner cap body 21 and communicates with the outer flame holes 22. The brim 12 extends from the inside to the outside above the outer burner cap body 21. A gap is provided between the brim 12 and the outer burner cap body 21 to form an ignition flue gas discharge passage 400. The through hole 25 communicates with the outside of the burner cap through the ignition flue gas discharge passage 400. A first ignition needle accommodation groove 501 located below the brim 12 is formed by a gap between the inner ring air groove 201 and the outer ring air groove 301, so as to facilitate installing the ignition needle 5 in the first ignition needle accommodation groove 501.
[0045] The burner cap provided by the utility model has the first and second air intake holes 101 arranged in the middle of the inner burner cap 1, and a cap 14 is provided to block the first and second air intake holes 101, so that the overflow liquid during cooking will not enter the first and second air intake holes 101, and the secondary air can flow out from the secondary air outlet hole 102 after passing through the first and second air intake holes 101 to provide secondary air for the burner. By arranging a brim 12 on the periphery of the inner burner cap body 11 and arranging the ignition needle 5 below the brim 12, the brim 12 blocks the ignition needle 5, preventing the overflow liquid during cooking from flowing onto the ignition needle 5. The overflow liquid during the cooking process drips onto the cap 14 and the brim 12, and then flows to the outside of the burner cap. The user only needs to clean the overflow liquid on the cap 14 and the brim 12. Therefore, the burner cap provided by the utility model has the advantages of being easy to clean and having a simple structure.
[0046] Optionally, the brim 12 extends horizontally above the outer periphery of the outer burner cap body 21 or protrudes from the outer periphery of the outer burner cap body 21 to completely block the outer burner cap body 21 and prevent the overflow liquid from dripping onto the outer burner cap body 21.
[0047] Optionally, the inner fire holes 13 are arranged higher than the brim 12 to prevent the overflow liquid from flowing into the inside of the burner cap through the inner fire holes 13.
[0048] Optionally, the cap 14 extends horizontally above the outer periphery of the inner burner cap body 11 or protrudes from the outer periphery of the inner burner cap body 11 to completely block the inner burner cap body 11 and prevent the overflow liquid from dripping onto the inner burner cap body 11.
[0049] Optionally, an outer ring fire transfer groove 23 is formed on the lower side of the outer burner cap body 21. One end of the outer ring fire transfer groove 23 is communicated with the first ignition needle accommodation groove 501, and the other end is communicated with the outside of the burner cap. Outer ring fire transfer holes 24 communicated with the outer ring air groove 301 are formed on the inner wall of the outer ring fire transfer groove 23. When the ignition needle 5 located at the first ignition needle accommodation groove 501 ignites, the flame will ignite the outer ring fire transfer holes 24 through the outer ring fire transfer groove 23, and then be transmitted to the outer fire holes 22, thereby realizing the fire transfer to the outer fire holes 22.
[0050] Optionally, a first inner ring fire transfer hole 16 communicated with the inner ring air groove 201 is further formed on the inner wall of the first and second air intake holes 101 to realize fire transfer.
[0051] Optionally, a plurality of second inner ring fire transfer holes 151 communicated with the inner ring air groove 201 are further formed on the upper side of the inner burner cap body 11. The second inner ring fire transfer holes 151 are arranged and extended from the position close to the first and second air intake holes 101 to the position close to the outer periphery of the inner burner cap body 11. The flame is transmitted from the first inner ring fire transfer hole 16 to the second inner ring fire transfer holes 151, and then to the inner fire holes 13, thereby realizing the fire transfer to the inner fire holes 13.
[0052] Optionally, a first inner-ring flame transmission groove 15 is further formed on the upper side of the inner fire cap body 11, and the second inner-ring flame transmission holes 151 are arranged in the first inner-ring flame transmission groove 15 to further improve the flame transmission effect.
[0053] Optionally, the inner fire cap 1 is integrally formed, and the outer fire cap 2 is integrally formed. Specifically, a first support pillar is arranged on the lower side of the inner fire cap body 11, and the first support pillar is fixedly installed on the flame distributor 3 of the burner by screws.
[0054] Optionally, the inner fire cap 1 and the outer fire cap 2 are integrally formed. Specifically, a second support pillar 141 is arranged on the lower side of the inner fire cap body 11, and the first support pillar is fixed on the outer fire cap body 21.
[0055] Optionally, a second support pillar 141 is arranged on the lower side of the cap 14, and the second support pillar 141 is fixed on the upper side of the inner fire cap body 11. A secondary air outlet hole 102 is formed among the upper side surface of the inner fire cap body 11, the second support pillar 141 and the cap 14.
[0056] On the other hand, the present utility model provides a burner, which includes a flame distributor 3, an ignition needle 5 and the above-mentioned fire cap. The flame distributor 3 includes a flame distributor 3 body. A convex portion 32 protruding towards the middle is arranged in the middle of the flame distributor 3 body. A second secondary air inlet hole 103 and a first inner flame distribution hole 202 located outside the second secondary air inlet hole 103 are formed on the convex portion 32. A first outer flame distribution hole 302 located outside the first inner flame distribution hole 202 is further formed on the flame distributor 3 body. A second ignition needle accommodation groove 502 located above the flame distributor 3 body is formed at an interval between the convex portion 32 and the first outer flame distribution hole 302. The second ignition needle accommodation groove 502 is communicated with the first ignition needle accommodation groove 501 to form an ignition needle accommodation cavity 500. The first outer flame distribution hole 302 is communicated with the outer ring air groove 301, and the first inner flame distribution hole 202 is communicated with the inner ring air groove 201. A second inner-ring flame transmission groove 33 communicating the second ignition needle accommodation groove 502 with the second secondary air inlet hole 103 is formed on the lower side of the convex portion 32. A third inner-ring flame transmission hole 35 communicated with the first inner flame distribution hole 202 is formed on the inner wall of the second inner-ring flame transmission groove 33. An ignition hole 34 located on one side of the second inner-ring flame transmission groove 33 is formed on the outer peripheral side of the convex portion 32. The ignition needle 5 is arranged in the ignition needle accommodation cavity 500. When the ignition needle 5 ignites, the ignition hole 34 catches fire, and the flame is respectively transmitted along the outer ring flame transmission groove 23 and the second inner-ring flame transmission groove 33. Specifically, the flame is transmitted along the outer ring flame transmission groove 23 to ignite the outer ring flame transmission holes 24, and then transmitted to the outer fire holes 22. The flame is transmitted along the second inner-ring flame transmission groove 33 to ignite the third inner-ring flame transmission holes 35. The flame of the third inner-ring flame transmission holes 35 is transmitted to the second inner-ring flame transmission holes 151, then transmitted to the first inner-ring flame transmission holes 16, and then transmitted to the inner fire holes 13, so as to realize the ignition of the inner fire holes 13.
[0057] Optionally, a fourth inner-ring flame transfer hole 36 communicating with the first inner flame-dividing hole 202 is formed in the inner wall of the second secondary air intake hole 103, and the flame of the third inner-ring flame transfer hole 35 is transmitted to the second inner-ring flame transfer hole 151 through the fourth inner-ring flame transfer hole 36 to further improve the stability of flame transmission.
[0058] Optionally, a third inner-ring flame transfer groove 37 extending from the outer peripheral side of the convex portion 32 to the inner wall of the second secondary air intake hole 103 is further formed in the inner wall of the second inner-ring flame transfer groove 33, and the third inner-ring flame transfer groove 37 communicates with the first inner flame-dividing hole 202. By providing the third inner-ring flame transfer groove 37, the stability and transmission efficiency of flame transmission are further improved.
[0059] Optionally, it further includes a burner head 4, and the burner head 4 includes a burner head body 41. A third secondary air intake hole 104, a second inner flame-dividing hole 203, and a second outer flame-dividing hole 303 are successively formed in the burner head body 41 from the inside to the outside. The third secondary air intake hole 104 is successively communicated with the second secondary air intake hole 103, the first secondary air intake hole 101, and the secondary air outlet hole 102 to form a secondary air passage 100 to provide secondary air for the burner. The second inner flame-dividing hole 203 is successively communicated with the first inner flame-dividing hole 202 and the inner-ring gas groove 201 to form an inner-ring gas supply passage 200 to provide inner-ring gas for the burner. The second outer flame-dividing hole 303 is successively communicated with the first outer flame-dividing hole 302 and the outer-ring gas groove 301 to form an outer-ring gas supply passage 300 to provide outer-ring gas for the burner.
[0060] Optionally, the ignition needle 5 is fixed on the burner head body 41.
[0061] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the creative concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.
Claims
1. A burner cap, characterized in that, Including: The inner fire cap (1) includes an inner fire cap body (11), a brim (12), inner fire holes (13), first and second air intake holes (101), a cap (14), and an inner ring air groove (201). The brim (12) is arranged on the outer peripheral side of the inner fire cap body (11). The inner fire cap body (11) protrudes upward from the brim (12). The inner fire holes (13) are arranged on the peripheral side of the inner fire cap body (11). The first and second air intake holes (101) are arranged in the middle of the inner fire cap body (11). The cap (14) is arranged on the upper side of the inner fire cap body (11) and above the first and second air intake holes (101). A secondary air outlet hole (102) communicating with the first and second air intake holes (101) is formed between the cap (14) and the inner fire cap body (11). The inner ring air groove (201) is opened on the lower side of the inner fire cap body (11). The inner ring air groove (201) communicates with the inner fire holes (13) and is located outside the first and second air intake holes (101). The outer fire cap (2) includes an outer fire cap body (21), outer fire holes (22), a through hole (25), and an outer ring air groove (301). The outer fire holes (22) are arranged on the peripheral side of the outer fire cap body (21). The through hole (25) is opened in the middle of the outer fire cap body (21). The outer ring air groove (301) is opened on the lower side of the outer fire cap body (21) and communicates with the outer fire holes (22). The brim (12) extends from the inside to the outside above the outer fire cap body (21). A gap is formed between the brim (12) and the outer fire cap body (21) to form an ignition flue gas discharge channel (400). The through hole (25) communicates with the outside of the fire cap through the ignition flue gas discharge channel (400). A first ignition needle accommodation groove (501) is formed between the inner ring air groove (201) and the outer ring air groove (301) and is located below the brim (12).
2. The burner cap according to claim 1, characterized in that, The brim (12) extends horizontally above the outer peripheral side of the outer fire cap body (21) or protrudes from the outer peripheral side of the outer fire cap body (21).
3. The burner cap according to claim 1, characterized in that, The inner fire holes (13) are arranged higher than the brim (12).
4. The burner cap according to claim 1, characterized in that, The cap (14) extends horizontally above the outer peripheral side of the inner fire cap body (11) or protrudes from the outer peripheral side of the inner fire cap body (11).
5. The burner cap according to claim 1, characterized in that, An outer ring fire transfer groove (23) is opened on the lower side of the outer fire cap body (21). One end of the outer ring fire transfer groove (23) communicates with the first ignition needle accommodation groove (501), and the other end communicates with the outside of the fire cap. Outer ring fire transfer holes (24) communicating with the outer ring air groove (301) are opened on the inner wall of the outer ring fire transfer groove (23).
6. The burner cap according to claim 1, wherein, First inner ring fire transfer holes (16) communicating with the inner ring air groove (201) are also opened on the inner wall of the first and second air intake holes (101).
7. The burner cap according to claim 6, characterized in that, A plurality of second inner-ring flame-transfer holes (151) communicating with the inner-ring air groove (201) are further formed in the upper side of the inner fire cap body (11), and the second inner-ring flame-transfer holes (151) are arranged and extend from a position close to the first secondary air inlet hole (101) to a position close to the outer peripheral side of the inner fire cap body (11).
8. The burner cap according to claim 7, wherein A first inner-ring flame-transfer groove (15) is further formed in the upper side of the inner fire cap body (11), and the second inner-ring flame-transfer holes (151) are arranged in the first inner-ring flame-transfer groove (15).
9. The burner cap according to any one of claims 1-8, characterized in that, The inner fire cap (1) is integrally formed, and the outer fire cap (2) is integrally formed; or The inner fire cap (1) and the outer fire cap (2) are integrally formed.
10. A burner, comprising a fuel distributor (3), an ignition needle (5), and a fire cap according to any one of claims 1-9. The fuel distributor (3) comprises a fuel distributor body (31). A convex portion (32) protruding upward is arranged in the middle of the fuel distributor body (31). A second secondary air inlet hole (103) and a first inner fire hole (202) located outside the second secondary air inlet hole (103) are formed in the convex portion (32). A first outer fire hole (302) located outside the first inner fire hole (202) is further formed in the fuel distributor body (31). A second ignition needle accommodation groove (502) located above the fuel distributor body (31) is formed by arranging a space between the convex portion (32) and the first outer fire hole (302). The second ignition needle accommodation groove (502) and the first ignition needle accommodation groove (501) communicate with each other to form an ignition needle accommodation cavity (500). The first outer fire hole (302) communicates with the outer-ring air groove (301), and the first inner fire hole (202) communicates with the inner-ring air groove (201). A second inner-ring flame-transfer groove (33) communicating the second ignition needle accommodation groove (502) with the second secondary air inlet hole (103) is formed in the lower side of the convex portion (32). A third inner-ring flame-transfer hole (35) communicating with the first inner fire hole (202) is formed in the inner wall of the second inner-ring flame-transfer groove (33). An ignition hole (34) located on one side of the second inner-ring flame-transfer groove (33) is formed in the outer peripheral side of the convex portion (32). The ignition needle (5) is arranged in the ignition needle accommodation cavity.
11. The burner according to claim 10, characterized in that, A fourth inner-ring flame-transfer hole (36) communicating with the first inner fire hole (202) is formed in the inner wall of the second secondary air inlet hole (103); and / or A third inner-ring flame-transfer groove (37) extending from the outer peripheral side of the convex portion (32) to the inner wall of the second secondary air inlet hole (103) is further formed in the inner wall of the second inner-ring flame-transfer groove (33), and the third inner-ring flame-transfer groove (37) communicates with the first inner fire hole (202).