Combustor

Abstract

The utility model provides a kind of burner, belong to gas stove technical field.The burner includes furnace head subassembly, fire divider and fixed structure, furnace head subassembly has outer ring air passage and inner ring air passage;Fixed structure includes fixed part and support part, fire divider is located at the top of furnace head subassembly, and the inner chamber of fire divider is connected with outer ring air passage;Fixed part is connected to the outer periphery of inner ring air passage, and support part is abutted to the bottom of fire divider.The utility model can effectively compensate the gap generated due to manufacturing error, reduce shaking and inclination, make the butt joint of furnace head subassembly and fire divider more firm, eliminate the gas leakage risk caused by misplacement or inclination, improve use safety.

Description

Technical Field

[0001] This utility model relates to the field of gas stove technology, and in particular to a burner. Background Technology

[0002] Currently, most mainstream household gas stoves on the market use stainless steel and are manufactured using sheet metal stamping processes for their combustion systems (typically including core components such as burners and flame spreaders) to reduce costs and simplify manufacturing. This technology has advantages such as simple structure, high production efficiency, and ease of mass production. However, the existing stainless steel burner structure is limited by the precision of sheet metal processing, resulting in significant errors in the dimensional fit between the burner and flame spreader. This leads to unstable assembly and a tendency to tilt, which in turn creates a potential gas leakage hazard at the junction of the burner assembly and the flame spreader. Utility Model Content

[0003] The first aspect of this utility model addresses the problems of the prior art by providing a burner that, through the limiting of the fixed structure, can effectively compensate for gaps caused by manufacturing errors, reduce shaking and tilting, ensure a more secure connection between the burner head assembly and the flame distributor, eliminate the risk of gas leakage caused by misalignment or tilting, and improve safety and assembly stability.

[0004] To achieve the objective of this utility model, the following technical solution is adopted: The first technical solution of this utility model is: a burner, the burner comprising: The burner assembly has an outer ring gas passage and an inner ring gas passage; A flame distributor is located above the burner assembly, and the inner cavity of the flame distributor is connected to the outer annular gas passage. The fixed structure includes a fixing part and a supporting part, wherein the fixing part is connected to the outer periphery of the inner ring air passage, and the supporting part abuts against the bottom of the flame distributor.

[0005] According to one embodiment of the present invention, the burner assembly includes: The bracket has a first locking hole and a second locking hole; An ejector assembly includes an outer ejector and an inner ejector, wherein the outer ejector passes through and is connected to the first locking hole, and the inner ejector passes through and is connected to the second locking hole; The connector includes a first sleeve and a second sleeve, wherein the first sleeve is sleeved on the outer periphery of the outer ejector tube and together form the outer annular air passage, and the second sleeve is sleeved on the outer periphery of the inner ejector tube and together form the inner annular air passage. The fixing structure is connected between the second sleeve and the fire distributor.

[0006] According to one embodiment of the present invention, the fixing part includes: A fixing plate is provided with a first through hole corresponding to the second sleeve. The second sleeve is provided with a first annular step along its circumference. The second sleeve passes through the first through hole and the fixing plate is snapped onto the first annular step. The support portion consists of two parts, which are formed by bending upwards and outwards from both sides of the fixing plate.

[0007] According to one embodiment of the present invention, the burner further includes an ignition needle assembly, which includes an ignition needle, a flameout protection device, and a first fixing bracket. The first fixing bracket is connected to the support frame. The first fixing bracket has a first fixing hole and a second fixing hole. The support frame has a second through hole corresponding to the first fixing hole and a third through hole corresponding to the second fixing hole. The fixing plate has a fourth through hole corresponding to the second through hole and a fifth through hole corresponding to the third through hole. The central axes of the first fixing hole, the second through hole, and the fourth through hole are collinear and are used to install the ignition needle. The central axes of the second fixing hole, the third through hole, and the fifth through hole are collinear and are used to install the flameout protection device.

[0008] According to one embodiment of the present invention, a first sealing section is formed between the first sleeve and the outer ejector tube, and a second sealing section is formed between the second sleeve and the inner ejector tube. The height of the first sealing section is h1, and the height of the second sealing section is h2, wherein h1 ≥ 11 mm, 30 mm ≥ h2 ≥ 25 mm.

[0009] According to one embodiment of the present invention, the diameter of the air outlet end of the first sleeve is d, wherein d ≥ 19.5 mm.

[0010] According to one embodiment of the present invention, the top end of the first sleeve is bent radially inward to form a first flange for abutting the top of the outer ejector tube. The top end of the second sleeve is bent radially inward to form a second flange for abutting the top of the inner ejector tube.

[0011] According to one embodiment of the present invention, the flame divider is provided with an air inlet corresponding to the outer annular air passage. The air inlet is connected to a connecting pipe. The connecting pipe is sleeved on the outer periphery of the first sleeve. The upper outer periphery of the connecting pipe is recessed inward to form an annular groove. The air inlet is inserted into the annular groove.

[0012] According to one embodiment of the present invention, the outer periphery of the first sleeve is provided with an annular stepped groove, and the bottom of the connecting pipe is provided with a second annular step corresponding to the stepped groove, the second annular step being inserted into and abutting against the annular stepped groove.

[0013] According to one embodiment of the present invention, the burner further includes: A deflector is connected inside the fire distributor and located above the air intake, and the projection of the deflector on the bottom wall of the fire distributor at least partially covers the air intake.

[0014] According to one embodiment of the present invention, the first locking hole and the second locking hole are both stepped holes. The outer periphery of the outer ejector tube and the inner ejector tube are provided with annular slots adapted to the stepped holes. The stepped holes are inserted into and locked into the corresponding annular slots to fix the outer ejector tube and the inner ejector tube.

[0015] According to one embodiment of the present invention, the outer periphery of both the outer ejector tube and the inner ejector tube is provided with two parallel annular protrusions, and the annular groove is formed between the two annular protrusions. When the stepped hole is engaged with the annular groove, the upper annular protrusion inserts into and abuts against the stepped surface of the stepped hole, while the lower annular protrusion abuts against the lower surface of the stepped hole.

[0016] Compared with the prior art, the present invention has the following advantages or beneficial effects: This invention, through the limiting of the fixed structure, can effectively compensate for gaps caused by manufacturing errors, reduce shaking and tilting, ensure a more secure connection between the burner assembly and the flame distributor, eliminate the risk of gas leakage caused by misalignment or tilting, and improve safety and assembly stability. Attached Figure Description

[0017] The above and other features and advantages of this invention will become more apparent from a detailed description of exemplary embodiments with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the burner connection according to an exemplary embodiment.

[0019] Figure 2 This is a longitudinal sectional view of a burner shown according to an exemplary embodiment.

[0020] Figure 3 This is an exploded view of a burner according to an exemplary embodiment.

[0021] Figure 4This is a schematic diagram illustrating the connection between the burner assembly and the mounting structure according to an exemplary embodiment.

[0022] Figure 5 This is a top view of a burner assembly according to an exemplary embodiment.

[0023] Figure 6 yes Figure 5 Sectional view along the AA direction.

[0024] Explanation of reference numerals in the attached figures: 1. Burner head assembly; 100. Outer annular gas passage; 101. Inner annular gas passage; 11. Bracket; 111. First locking hole; 112. Second locking hole; 113. Second through hole; 114. Third through hole; 12. Injector tube assembly; 121. Outer injector tube; 122. Inner injector tube; 123. Fixing plate; 124. Annular groove; 125. Annular protrusion; 13. Connector; 131. First sleeve; 1311. First flange; 1312. Annular step groove; 132. Second sleeve; 1321. First annular step; 1 322. Second flange; 2. Flame distributor; 21. Air inlet; 22. Connecting pipe; 221. Annular groove; 222. Second annular step; 3. Fixing structure; 31. Fixing part; 311. Fixing plate; 3110. First through hole; 311. Fourth through hole; 3112. Fifth through hole; 32. Support part; 4. Ignition needle assembly; 41. First fixing bracket; 411. First fixing hole; 412. Second fixing hole; 5. Guide plate; 6. Flame cap assembly; 61. Outer flame cap; 611. Outer ring air outlet; 62. Inner flame cap. Detailed Implementation

[0025] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0026] The terms “a,” “one,” and “the” are used to indicate the existence of one or more elements / components / etc.; the terms “include” and “have” are used to indicate an open-ended meaning of inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.

[0027] This utility model embodiment provides a burner, such as Figure 1-6As shown, the burner includes a burner head assembly 1, a flame spreader 2, and a fixing structure 3. The burner head assembly 1 has an outer ring gas passage 100 and an inner ring gas passage 101. The flame spreader 2 is located above the burner head assembly 1, and its inner cavity is connected to the outer ring gas passage 100. The fixing structure 3 includes a fixing part 31 and a supporting part 32. The fixing part 31 is connected to the outer periphery of the inner ring gas passage 101, and the supporting part abuts against the bottom of the flame spreader 2. The fixing structure 3 can provide limiting support for the installation of the flame spreader 2. Through the limiting of the fixing structure 3, gaps caused by manufacturing errors can be effectively compensated, shaking and tilting can be reduced, ensuring a more secure connection between the burner head assembly 1 and the flame spreader 2, eliminating the risk of gas leakage caused by misalignment or tilting, improving safety and assembly stability, and reducing dependence on machining accuracy. In addition, the fixing structure 3 can also share some assembly stress, reduce deformation or loosening caused by long-term thermal expansion and contraction or vibration, and extend the component life.

[0028] In a preferred embodiment of this utility model, such as Figure 1-6 The burner assembly 1 shown includes a bracket 11, an ejector tube assembly 12, and a connector 13. The bracket 11 has a first locking hole 111 and a second locking hole 112. The ejector tube assembly 12 includes an outer ejector tube 121 and an inner ejector tube 122. The outer ejector tube 121 passes through and is connected to the first locking hole 111, and the inner ejector tube 122 passes through and is connected to the second locking hole 112. The connector 13 includes a first sleeve 131 and a second sleeve 132. The first sleeve 131 is fitted around the outer periphery of the outer ejector tube 121 and together they form an outer annular gas passage 100. The second sleeve 132 is fitted around the outer periphery of the inner ejector tube 122 and together they form an inner annular gas passage 101. A fixing structure 3 is connected between the second sleeve 132 and the burner 2. The connector 13 effectively ensures the installation dimensions of the ejector tube assembly 12 and the burner 2, solves the problem of gas leakage due to structural fit issues caused by the manufacturing process, and improves the safety performance of the product.

[0029] The ejector tube assembly 12 also includes a fixing piece 123. The fixing piece 123 is U-shaped in general. Its two ends at the opening are bent outward and connected to the outer ejector tube 121 and the inner ejector tube 122. The bottom of the fixing piece 123 is fixed to the stove housing to limit and fix the outer ejector tube 121 and the inner ejector tube 122.

[0030] In a preferred embodiment of this utility model, such as Figure 1-6The fixing structure 3 shown includes a fixing plate 311. The fixing plate 311 has a first through hole 3110 corresponding to the second sleeve 132. The second sleeve 132 has a first annular step 1321 along its circumference. The second sleeve 132 passes through the first through hole 3110 and the fixing plate 311 is engaged with the first annular step 1321. There are two support parts 32, which are formed by bending the two sides of the fixing plate 311 upwards and outwards respectively. The two support parts 32 can respectively abut against the bottom of the burner 2. The first through hole 3110 and the first annular step 1321 can be fitted with a clearance to limit and fix the second sleeve 132 to the fixing plate 311. Then, the two support parts 32 can further limit and support the burner 2, thereby effectively compensating for gaps caused by manufacturing errors, reducing shaking and tilting, ensuring a more secure connection between the burner assembly 1 and the burner 2, and eliminating the risk of gas leakage caused by misalignment or tilting. In a preferred embodiment of this utility model, such as Figure 1-6 The burner shown also includes an ignition needle assembly 4, which includes an ignition needle, a flameout protection device, and a first mounting bracket 41. The first mounting bracket 41 is connected to the bracket 11 and has a first mounting hole 411 and a second mounting hole 412. The bracket 11 has a second through hole 113 corresponding to the first mounting hole 411 and a third through hole 114 corresponding to the second mounting hole 412. The mounting plate 311 has a fourth through hole 3111 corresponding to the second through hole 113 and a fifth through hole 3112 corresponding to the third through hole 114. The central axes of the first mounting hole 411, the second through hole 113, and the fourth through hole 3111 are collinear and are used to install the ignition needle. The central axes of the second mounting hole 412, the third through hole 114, and the fifth through hole 3112 are collinear and are used to install the flameout protection device. In other words, this application utilizes a three-layer structure from bottom to top, consisting of the first fixing frame 41, the bracket 11, and the fixing plate 311, to limit and install the ignition needle and the flameout protection device, ensuring the assembly accuracy of the ignition needle and the flameout protection device, improving ignition efficiency, and ensuring complete combustion of the gas.

[0031] In addition, the ignition needle is also provided with a retaining ring, and the first fixing hole 411 is provided with a limiting groove for limiting the retaining ring. The retaining ring is engaged with the limiting groove to limit the ignition needle.

[0032] In a preferred embodiment of this utility model, such as Figure 1-6A first sealing section is formed between the first sleeve 131 and the outer ejector tube 121, and a second sealing section is formed between the second sleeve 132 and the inner ejector tube 122. The height of the first sealing section is h1, and the height of the second sealing section is h2, where h1 ≥ 11 mm and 30 mm ≥ h2 ≥ 25 mm. The first sleeve 131 and the second sleeve 132 not only relax the requirements for the machining dimensions and other precision of the outer ejector tube 121 and the inner ejector tube 122, compensating for manufacturing and assembly errors, but also significantly improve airtightness, enhance operational safety, avoid fuel waste, and ensure the designed combustion efficiency.

[0033] In a preferred embodiment of this utility model, such as Figure 1-6 The diameter of the gas outlet end of the first sleeve 131 shown is d, where d ≥ 19.5 mm. The diameter in this application is the inner diameter of the gas outlet end of the first sleeve 131. Since the diameter of the gas outlet end of the first sleeve 131 is ≥ 19.5 mm, preferably 19.5 mm to 21 mm, a larger gas outlet diameter can be used to connect with the burner 2, relaxing the tolerance requirements for the fit between the burner head assembly 1 and the burner 2. This reduces the probability of loosening or tilting due to dimensional errors, improving assembly stability from the design perspective.

[0034] In a preferred embodiment of this utility model, such as Figure 1-6 The top end of the first sleeve 131 is bent radially inward to form a first flange 1311 for abutting the top of the outer ejector tube 121; the top end of the second sleeve 132 is bent radially inward to form a second flange 1322 for abutting the top of the inner ejector tube 122. The first flange 1311 increases the flatness of the end face of the first sleeve 131 (i.e., the outer annular gas passage 100) and also increases its contact area with the flame distributor 2, reducing local stress concentration and preventing loosening of the connection due to long-term stress. The second flange 1322 increases the flatness of the end face of the second sleeve 132, making the fit between the second sleeve 132 and the inner flame cap 62 more stable and ensuring the gas output efficiency of the inner annular gas passage 101.

[0035] In a preferred embodiment of this utility model, such as Figure 1-6 The illustrated flame distributor 2 has an air inlet 21 corresponding to the outer annular air passage 100. The air inlet 21 is connected to a connecting pipe 22, which is sleeved around the outer periphery of the first sleeve 131. The upper outer periphery of the connecting pipe 22 is recessed inward to form an annular groove 221, into which the air inlet 21 is inserted. In this application, the first sleeve 131 is sleeved around the outer ejector tube 121, and the connecting pipe 22 is sleeved outside the first sleeve 131. The combination of these multiple components not only enhances the stability of the entire structure but also reduces the dependence on the precision of individual parts, compensates for manufacturing and assembly errors, and significantly improves airtightness and product safety performance.

[0036] In addition, the snap-fit ​​between the annular groove 221 and the air inlet 21 allows for quick assembly and precise positioning of the connecting pipe 22 and the flame distributor 2, simplifying the assembly process and improving assembly efficiency.

[0037] In a preferred embodiment of this utility model, such as Figure 1-6 The first sleeve 131 shown has an annular stepped groove 1312 on its outer periphery, and the bottom of the connecting pipe 22 has a second annular step 222 corresponding to the stepped groove. The second annular step 222 is inserted into and abuts against the annular stepped groove 1312.

[0038] Furthermore, the top of the first sleeve 131 of this application can abut against the top of the outer ejector tube 121 via the first flange 1311, and the lower part of the first sleeve 131 abuts against the top surface of the upper annular protrusion 125, thereby limiting the first sleeve 131. Similarly, the second sleeve 132 abuts against the top of the inner ejector tube 122 via the second flange 1322, and the bottom of the second sleeve 132 abuts against the top surface of the upper annular protrusion 125, thereby limiting the second sleeve 132.

[0039] In a preferred embodiment of this utility model, such as Figure 1-3 The burner shown also includes a baffle plate 5, which is connected inside the burner distributor 2 and located above the air inlet 21. The projection of the baffle plate 5 on the bottom wall of the burner distributor 2 at least partially covers the air inlet 21. The baffle plate 5 is fixed to the bottom of the burner distributor 2 by screws. The baffle plate 5 can partially or completely cover the air inlet 21. Preferably, the baffle plate 5 is located directly above the air inlet 21, which can divert the gas flow, making the gas output of the burner distributor 2 more uniform and improving the thermal efficiency of the burner.

[0040] like Figure 1-6 The burner shown also includes a flame cap assembly 6, which includes an outer flame cap 61 and an inner flame cap 62. The outer flame cap 61 is placed on top of the flame distributor 2 and forms an outer ring gas outlet chamber with it. The outer flame cap 61 is provided with multiple outer ring gas outlet holes 611, and the top surface of the guide plate 5 is located below the outer ring gas outlet holes 611. The inner flame cap 62 is placed on top of the second sleeve 132, which simplifies the structure of the burner and allows the gas in the inner injector tube 122 to be directly burned through the inner flame cap 62.

[0041] In a preferred embodiment of this utility model, such as Figure 1-6The first locking hole 111 and the second locking hole 112 shown are both stepped holes. The outer periphery of both the outer ejector tube 121 and the inner ejector tube 122 is provided with annular grooves 124 that fit the stepped holes. The stepped holes are inserted into and locked into the corresponding annular grooves 124 to fix the outer ejector tube 121 and the inner ejector tube 122. Locking the stepped holes into the corresponding annular grooves 124 ensures rapid assembly and precise positioning, simplifies the assembly process, improves assembly efficiency, and guarantees the flatness of the air outlet ends of the outer ejector tube 121 and the inner ejector tube 122.

[0042] The outer ejector tube 121 has a larger diameter than the inner ejector tube 122, so that the outer ejector tube 121 can eject more air to compensate for the pressure loss caused by the longer flow path of the outer ring flame.

[0043] In a preferred embodiment of this utility model, such as Figure 1-6 The outer ejector tube 121 and inner ejector tube 122 shown are each provided with two parallel annular protrusions 125 on their outer periphery, forming an annular groove 124 between the two annular protrusions 125. When the stepped hole is engaged with the annular groove 124, the upper annular protrusion 125 inserts into and abuts against the stepped surface of the stepped hole, while the lower annular protrusion 125 abuts against the lower surface of the stepped hole. Preferably, the outer end of the upper annular protrusion 125 has a guide surface that slopes downwards from the outside inwards to guide the stepped hole into the corresponding annular groove 124, allowing the outer ejector tube 121 and inner ejector tube 122 to reach the predetermined position. This effectively prevents misalignment and rotation during assembly, laying the foundation for accurate docking of subsequent components such as the furnace head, and fundamentally reducing the risk of gas leakage due to installation deviations. Furthermore, the two parallel annular protrusions 125 abut against both sides of the stepped hole, significantly enhancing the strength and rigidity of the connection. This structure can better resist the vibration generated during gas combustion and the stress caused by long-term thermal expansion and contraction, preventing the ejector tube from gradually loosening due to external forces, thereby improving the reliability and safety of the product throughout its entire life cycle.

[0044] In addition, the external ejector tube 121 and the internal ejector tube 122 have the same structure except for the tube diameter. Taking the external ejector tube 121 as an example, the external ejector tube 121 includes a contraction section, a straight section, an expansion section and a transition section in sequence along the airflow direction. The transition section includes an arc-shaped tube section and a vertical tube section. The outer periphery of the vertical tube section is provided with the above-mentioned two parallel annular protrusions 125. During installation, the vertical tube section can be inserted into the corresponding first locking hole 111 from the bottom of the bracket 11.

[0045] In this embodiment of the invention, the term "multiple" refers to two or more, unless otherwise explicitly defined. The terms "install," "connect," and "fix" should be interpreted broadly. For example, "connect" can mean a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention based on the specific circumstances.

[0046] In the description of the embodiments of this utility model, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific direction or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0047] In the description of this specification, the terms "an embodiment," "a preferred embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A burner, characterized in that, include: The burner assembly (1) has an outer ring gas passage (100) and an inner ring gas passage (101); The flame distributor (2) is located above the burner assembly (1), and the inner cavity of the flame distributor (2) is connected to the outer ring gas passage (100). The fixed structure (3) includes a fixing part (31) and a supporting part (32). The fixing part (31) is connected to the outer periphery of the inner ring air passage (101), and the supporting part (32) abuts against the bottom of the fire distributor (2).

2. The burner according to claim 1, characterized in that, The burner assembly (1) includes: The bracket (11) has a first locking hole (111) and a second locking hole (112). The ejector assembly (12) includes an outer ejector (121) and an inner ejector (122), wherein the outer ejector (121) passes through and is connected to the first locking hole (111), and the inner ejector (122) passes through and is connected to the second locking hole (112). The connector (13) includes a first sleeve (131) and a second sleeve (132). The first sleeve (131) is sleeved on the outer periphery of the outer ejector tube (121) and together they form the outer annular airway (100). The second sleeve (132) is sleeved on the outer periphery of the inner ejector tube (122) and together they form the inner annular airway (101). The fixing structure (3) is connected between the second sleeve (132) and the fire distributor (2).

3. The burner according to claim 2, characterized in that, The fixing part (31) includes: A fixing plate (311) is provided with a first through hole (3110) corresponding to the second sleeve (132). The second sleeve (132) is provided with a first annular step (1321) along its circumference. The second sleeve (132) passes through the first through hole (3110) and the fixing plate (311) is snapped onto the first annular step (1321). There are two support parts (32), which are formed by bending the two sides of the fixing plate (311) upward and outward respectively.

4. The burner according to claim 3, characterized in that, It also includes an ignition needle assembly (4), which includes an ignition needle, a flameout protection device, and a first fixing bracket (41). The first fixing bracket (41) is connected to the bracket (11). The first fixing bracket (41) has a first fixing hole (411) and a second fixing hole (412). The bracket (11) has a second through hole (113) corresponding to the first fixing hole (411) and a third through hole (114) corresponding to the second fixing hole (412). The fixing plate (311) has a fourth through hole (3111) corresponding to the second through hole (113) and a fifth through hole (3112) corresponding to the third through hole (114). The central axes of the first fixing hole (411), the second through hole (113) and the fourth through hole (3111) are collinear and are used to install the ignition needle. The central axes of the second fixing hole (412), the third through hole (114) and the fifth through hole (3112) are collinear and are used to install the flameout protection device.

5. The burner according to claim 2, characterized in that, A first sealing section is formed between the first sleeve (131) and the outer ejector tube (121), and a second sealing section is formed between the second sleeve (132) and the inner ejector tube (122). The height of the first sealing section is h1, and the height of the second sealing section is h2, wherein h1 ≥ 11 mm and 30 mm ≥ h2 ≥ 25 mm.

6. The burner according to claim 2, characterized in that, The diameter of the outlet end of the first sleeve (131) is d, where d≥19.5mm.

7. The burner according to claim 2, characterized in that, The top end of the first sleeve (131) is bent radially inward to form a first flange (1311) for abutting against the top of the outer ejector tube (121). The top end of the second sleeve (132) is bent radially inward to form a second flange (1322) for abutting against the top of the inner ejector tube (122).

8. The burner according to claim 2, characterized in that, The flame divider (2) is provided with an air inlet (21) corresponding to the outer annular air passage (100). The air inlet (21) is connected to a connecting pipe (22). The connecting pipe (22) is sleeved on the outer periphery of the first sleeve (131). The upper outer periphery of the connecting pipe (22) is recessed inward to form an annular groove (221). The air inlet (21) is inserted into the annular groove (221).

9. The burner according to claim 8, characterized in that, The first sleeve (131) has an annular stepped groove (1312) on its outer periphery, and the bottom of the connecting pipe (22) has a second annular step (222) corresponding to the stepped groove. The second annular step (222) is inserted into and abuts against the annular stepped groove (1312).

10. The burner according to claim 8, characterized in that, Also includes: A deflector plate (5) is connected inside the fire distributor (2) and located above the air inlet (21), and the projection of the deflector plate (5) on the bottom wall of the fire distributor (2) at least partially covers the air inlet (21).

11. The burner according to claim 2, characterized in that, Both the first locking hole (111) and the second locking hole (112) are stepped holes. The outer periphery of the outer ejector tube (121) and the inner ejector tube (122) are provided with annular slots (124) that are adapted to the stepped holes. The stepped holes are inserted into and locked into the corresponding annular slots (124) to fix the outer ejector tube (121) and the inner ejector tube (122).

12. The burner according to claim 11, characterized in that, The outer ejector tube (121) and the inner ejector tube (122) are each provided with two parallel annular protrusions (125) on their outer periphery, and the annular groove (124) is formed between the two annular protrusions (125). When the stepped hole is engaged with the annular slot (124), the upper annular protrusion (125) is inserted into and abuts against the stepped surface of the stepped hole, while the lower annular protrusion (125) abuts against the lower surface of the stepped hole.

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