Combustor

Abstract

The invention provides a combustor which comprises an outer fire cover and an inner fire cover, the inner fire cover and / or the outer fire cover comprises a double-seam fire cover structure, the double-seam fire cover structure comprises a double-seam fire cover body with an annular inner cavity, and the double-seam fire cover body is provided with an upper annular seam and a lower annular seam which are distributed at intervals in the axial direction of the double-seam fire cover body and are concentric. A plurality of first communicating sections extending in the circumferential direction are arranged on the upper annular gap at intervals in the circumferential direction, a plurality of second communicating sections extending in the circumferential direction are arranged on the lower annular gap at intervals in the circumferential direction, and the first communicating sections and the second communicating sections directly communicate with the annular inner cavity. The first communicating sections and the second communicating sections are distributed in a staggered mode in the circumferential direction of the double-seam fire cover body. The combustor provided by the invention has a better combustion effect.

Description

Technical Field

[0001] This invention relates to the field of burner technology, and more specifically to a burner. Background Technology

[0002] Gas stoves are the core equipment of modern kitchens, and the performance of their burners directly affects thermal efficiency, flame control, combustion stability, and safety. Traditional household gas stove burner caps are mostly made of cast iron or copper alloy. Cast iron is inexpensive but has poor corrosion resistance and is prone to rusting; copper alloys have good thermal conductivity and are easy to machine, but are more expensive. As consumers increasingly demand durability, cleanliness, and aesthetics in kitchen appliances, stainless steel, due to its excellent mechanical strength, outstanding corrosion resistance, and modern look, has gradually become the ideal material for high-end burners, especially burner cap components. However, applying stainless steel to burner caps, especially those with complex structures, presents significant manufacturing challenges. Stainless steel has high hardness and lower ductility than copper; producing burner caps with intricate structures using traditional casting or post-processing methods is costly and inefficient.

[0003] Current stainless steel burners use a circular array of discrete flame holes on the annular side of the burner cap. While this structure is simple, it has inherent drawbacks: after the gas is concentrated and ejected from these laterally distributed flame holes, the flame appears as independent point-like or short flame columns around the burner cap. The significant spacing between the flame roots results in an insufficiently continuous and uniform heat load distribution along the circumference of the burner cap. Summary of the Invention

[0004] In view of this, the object of the present invention is to provide a burner.

[0005] The technical solution used in this invention is as follows: a burner is provided, including a flame distributor, an outer ejector tube, an inner ejector tube, an outer flame cap, and an inner flame cap. The inner flame cap and / or the outer flame cap includes a double-slit flame cap structure. The double-slit flame cap structure includes a double-slit flame cap body with an annular inner cavity. The double-slit flame cap body has an upper annular slit and a lower annular slit that are spaced apart and concentric along its axial direction. The upper annular slit has a plurality of circumferentially extending first connecting sections spaced apart in the circumferential direction. The lower annular slit has a plurality of circumferentially extending second connecting sections spaced apart in the circumferential direction. Both the first connecting sections and the second connecting sections are directly connected to the annular inner cavity, and the first connecting sections and the second connecting sections are staggered along the circumference of the double-slit flame cap body.

[0006] The flame distributor is provided with an external gas flow channel and an internal gas flow channel. The annular inner cavity of the inner flame cap and the internal gas flow channel together form an annular internal gas passage. The annular inner cavity of the outer flame cap and the external gas flow channel together form an annular external gas passage. The external ejector tube is connected to the external gas passage, and the internal ejector tube is connected to the internal gas passage.

[0007] Preferably, the flame distributor includes a first annular wall, a second annular wall, a third annular wall, and a fourth annular wall arranged coaxially from the inside to the outside, wherein the first annular wall and the second annular wall form the internal gas flow channel, and the third annular wall and the fourth annular wall form the external gas flow channel;

[0008] The double-slit flame cap body includes a first annular block, a second annular block, and a third annular block arranged radially from the inside out. An upper annular gap is formed between the first annular block and the second annular block, and a lower annular gap is formed between the second annular block and the third annular block. The first annular block is connected to the third annular wall, and the third annular block is connected to the fourth annular wall.

[0009] Preferably, the outer flame cap includes the double-slit flame cap structure, and the inner flame cap includes a lower ring block and an upper ring cap. A first annular gap is formed between the lower ring block and the upper ring cap. A second annular gap is formed on the lower ring block. A plurality of circumferentially spaced through holes are formed at the bottom of the second annular gap. The through holes communicate with the annular inner cavity. The lower ring block and the upper ring cap are fixedly connected by fasteners. A first groove is formed by a radial indentation on the lower ring block. A flame hole is formed on the first groove. The upper ring cap has a blocking block. The blocking block blocks the first groove axially. A second groove is formed by a recess in the second ring wall towards the first ring wall. The second groove is connected to the first groove.

[0010] Preferably, a flame-transfer slit is provided on the first annular block, the flame-transfer slit extends radially along the body of the double-slit flame cap, and flame-transfer holes are provided on both sides of the flame-transfer slit.

[0011] Preferably, the double-slit flame cap body is an integrally formed structure, and a first annular block, a second annular block, and a third annular block are machined on the double-slit flame cap body. The first annular block and the second annular block are connected by a plurality of first connecting blocks arranged at intervals along the circumference, and a first connecting section is formed between two adjacent first connecting blocks. The second annular block and the third annular block are connected by a plurality of second connecting blocks arranged at intervals along the circumference, and a second connecting section is formed between two adjacent second connecting blocks. The first connecting blocks and the second connecting blocks are both disposed in the annular inner cavity and are staggered along the circumference of the annular inner cavity. The first connecting blocks and the second connecting blocks both extend along the circumference of the double-slit flame cap body.

[0012] Preferably, in the radial direction of the double-slit flame cap body, the first connecting block is aligned with the position of the second connecting section, and the second connecting block is aligned with the position of the first connecting section.

[0013] Preferably, the first connecting block and the second connecting block are sequentially staggered along the circumference of the double-slit flame cap body, the first connecting block extends and protrudes relative to the second connecting block in the axial direction of the flame cap, and the number of the first connecting block and the second connecting block is at least 3.

[0014] Preferably, the second connecting block has multiple spaced second openings that communicate with the lower annular gap; the first connecting block includes a blocking block and an opening block; the blocking block blocks the communication between the upper annular gap and the annular inner cavity; the opening block has multiple circumferentially spaced first openings that communicate with the upper annular gap and the annular inner cavity; the blocking block and the opening block are alternately arranged circumferentially, and there are four blocking blocks arranged in pairs opposite to each other.

[0015] Preferably, the arc length of the first connected segment is greater than the arc length of the second connected segment, and the width of the first connected segment is greater than the width of the second connected segment.

[0016] The burner provided by this invention has the following significant advantages:

[0017] (1) Stable combustion and reduced flameout: By interlacing the connecting sections of the upper and lower annular gaps, the closed fire ring structure is broken, and the upper and lower flames are alternately replenished with oxygen, ensuring sufficient air supply and avoiding the problem of easy flameout and instability of the burner after the annular gaps are set on the burner cover.

[0018] (2) Internal and external coordination for efficient combustion: Both the inner and outer flame caps adopt this double-slit structure, which enables both the inner and outer ring flames to have excellent stable combustion capabilities, together forming a three-dimensional combustion field with sufficient air supply and uniform flame distribution, significantly improving overall combustion efficiency and stability.

[0019] (3) The first connecting section and the second connecting section are staggered along the circumference of the double-slit flame cap body, making it easier to manufacture the stainless steel double-slit flame cap. Attached Figure Description

[0020] The above and other objects, features, and advantages of the invention will become clearer through a more detailed description of the preferred embodiments illustrated in the accompanying drawings. The same reference numerals denote the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of the invention.

[0021] Figure 1 This is a schematic diagram of the burner structure provided by the present invention.

[0022] Figure 2 A schematic diagram of the assembly structure of the flame distributor, inner flame cap, and outer flame cap provided for the invention.

[0023] Figure 3 , Figure 10 The diagram shows the structure of the double-slit flame cap at different angles provided by this invention.

[0024] Figure 4 , Figure 11-13 This is a partial structural diagram of the double-slit fire cap structure at different angles provided by the present invention.

[0025] Figure 5 for Figure 2 Cross-sectional structural diagram.

[0026] Figure 6 , Figure 9 The diagram shows partial cross-sectional views of the double-slit fire cap structure at different angles, as provided by this invention.

[0027] Figure 7 This is a schematic diagram of the fire distributor structure provided by the present invention.

[0028] Figure 8 This is a schematic diagram of the explosion structure of the inner fire cover provided by the present invention.

[0029] Figure 14 This is a schematic diagram of the circumferentially staggered distribution structure of the first and second connected sections along the fire cover provided by the present invention.

[0030] Flame distributor 100; First annular wall 21; Second annular wall 22; Third annular wall 23; Fourth annular wall 24; Inner gas flow channel 251; Outer gas flow channel 252; Inner gas passage 101; Outer gas passage 102; Second groove 29; Outer ejector tube 201; Inner ejector tube 202; Outer flame cap 301; Inner flame cap 302; Lower ring block 3021; ​​Upper ring cap 3022; First annular slit 3023; Second annular slit 3024; Slit through hole 3025; First groove 3026; Flame hole 30261; Shielding Block 3027; Thermocouple 303; Ignition needle 304; Double-slit flame cap structure 300; Outer wall 31; Inner wall 32; Annular inner cavity 33; Upper annular slit 34; First connecting section 341; Lower annular slit 35; Second connecting section 351; First annular block 361; Flame transmission slit 3610; Flame transmission hole 3613; Second annular block 362; Third annular block 363; First connecting block 371; First opening 3711; Second connecting block 372; Second opening 3721; Barrier block 381; Opening block 382. Detailed Implementation

[0031] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention. In this embodiment, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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 present invention and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0032] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to and integrated with the other element, or there may be an intervening element present. The terms "mounted," "one end," "the other end," and similar expressions used in this invention are for illustrative purposes only.

[0033] Please refer to Figure 1-14 This invention provides a burner including a flame distributor 100, an outer ejector tube 201, an inner ejector tube 202, an outer flame cap 301, and an inner flame cap 302. Both the inner flame cap 302 and the outer flame cap 301 are double-slit flame cap structures 300. The double-slit flame cap structure 300 includes a double-slit flame cap body with an annular inner cavity 33. The annular inner cavity 33 is formed by the space between the annular outer wall 31 and the annular inner wall 32. The double-slit flame cap body has an upper annular slit 34 and a lower annular slit 35 that are spaced apart and concentrically distributed along its axial direction. The upper annular slit 34 has a plurality of circumferentially extending first connecting sections 341 spaced apart in the circumferential direction. The lower annular slit 35 has a plurality of circumferentially extending second connecting sections 351 spaced apart in the circumferential direction. The first connecting sections 341 and the second connecting sections 351 are directly connected to the annular inner cavity 33, and the first connecting sections 341 and the second connecting sections 351 are staggered along the circumference of the double-slit flame cap body. In this embodiment, the first connecting section 341 and the second connecting section 351 are not a circular through hole, but a circumferentially extending narrow through groove.

[0034] The burner 100 is provided with an external gas flow channel 252 and an internal gas flow channel 251. The annular inner cavity 33 of the inner burner cap 302 and the internal gas flow channel 251 together form an annular internal gas passage 101. The annular inner cavity 33 of the outer burner cap 301 and the external gas flow channel 252 together form an annular external gas passage 102. The outer ejector tube 201 is connected to the external gas passage 102, and the inner ejector tube 202 is connected to the internal gas passage 101.

[0035] The burner provided by this invention has a continuous annular slit on the burner cap, which makes the pressure of the gas more even along the circumference in the annular cavity. However, the design of the upper and lower annular slits makes it easy for the upper and lower slits to form a closed flame ring. This closed flame ring will seriously hinder the diffusion and replenishment of external air to the root of the flame, especially to the area inside the slit, resulting in local oxygen deficiency in the combustion zone and unstable flame combustion.

[0036] The burner in this invention has two layers of interlaced annular slits, which can avoid the formation of two "fire rings" that compete with each other for limited root air. This allows the upper and lower flames to alternate and replenish oxygen, ensuring sufficient air supply and promoting complete combustion. It also avoids the problems of burner detachment and instability that occur when the burner cap has double annular slits.

[0037] refer to Figure 5 and Figure 7 In a preferred embodiment, the flame distributor 100 includes a first annular wall 21, a second annular wall 22, a third annular wall 23 and a fourth annular wall 24 arranged coaxially from the inside to the outside. An inner gas flow channel 251 is formed between the first annular wall 21 and the second annular wall 22, and an outer gas flow channel 252 is formed between the third annular wall 23 and the fourth annular wall 24.

[0038] refer to Figure 2-6 In a preferred embodiment, the double-slit flame cap body includes a first annular block 361, a second annular block 362, and a third annular block 363, which are sequentially machined radially from the inside out. An upper annular gap 34 is formed between the first annular block 361 and the second annular block 362, and a lower annular gap 35 is formed between the second annular block 362 and the third annular block 363. The first annular block 361 is connected to the third annular wall 23, and the third annular block 363 is connected to the fourth annular wall 24. This structure ensures strict isolation and non-interference between the inner and outer gas flow channels 252, while achieving precise docking and stable connection between the flame distributor 100 and the flame cap. This not only improves assembly accuracy and structural reliability but also effectively guides the uniform flow of gas, laying an optimized structural foundation for stable and efficient combustion of the flame.

[0039] refer to Figure 1 , Figure 5 , Figure 8In a preferred embodiment, the outer flame cap 301 includes a double-slit flame cap structure, and the inner flame cap 302 includes a lower ring block 3021 and an upper ring cap 3022. A first annular gap 3023 is formed between the lower ring block 3021 and the upper ring cap 3022. A second annular gap 3024 is provided on the lower ring block 3021. A plurality of circumferentially spaced through holes 3025 are provided at the bottom of the second annular gap 3024. The through holes 3025 communicate with the annular inner cavity 33. The lower ring block 3021 and the upper ring cap 3022 are connected by... Fasteners are used for fixed connection. The lower ring block 3021 is radially recessed to form a first groove 3026. A ignition hole 30261 is opened on the first groove 3026. The upper ring cover 3022 has a blocking block 3027. The blocking block 3027 blocks the first groove 3026 axially. The second ring wall 22 is recessed towards the first ring wall 21 to form a second groove 29. The second groove 29 is connected to the first groove 3026. The first groove 3026 and the second groove 29 form the receiving positions of the ignition needle 304 and the thermocouple 305.

[0040] In this embodiment, the inner burner cap 302 adopts a split double-slit inner burner cap 302. During routine maintenance, simple disassembly is all that's needed to remove the upper ring cap 3022 with the shielding block 3027, exposing the ignition needle 304 and thermocouple 305 for easy inspection and maintenance. The first annular gap 3023 formed between the upper and lower ring blocks of this split double-slit inner burner cap 302, together with the second annular gap 3024 on the lower ring block 3021, constitutes a multi-stage gas release channel, effectively promoting the mixing of gas and air. Simultaneously, the groove on the lower ring block 3021 provides precise installation and protection space for the ignition needle 304 and thermocouple 305, while the shielding block 3027 above, while protecting these critical components from direct flame impact, also plays a dual role in guiding airflow and suppressing and stabilizing the flame shape. This design achieves integrated combustion performance optimization and ignition safety protection, and improves the maintainability of the structure.

[0041] refer to Figure 5 In a preferred embodiment, a flame transfer slit 3610 is formed on the first annular block 361, extending radially along the double-slit flame cap body. Flame transfer holes 3613 are formed on both sides of the flame transfer slit 3610. This flame transfer slit 3610 structure, based on the stable combustion achieved by "alternating oxygen replacement" in claim 1, further ensures reliable ignition and rapid flame transmission, improving the ignition success rate and system response speed. The flame transfer holes 3613 give the flame transfer slit 3610 a better flame stabilization effect.

[0042] refer to Figure 3-4 , Figure 6 , Figure 9-10In a preferred embodiment, the double-slit flame cap body is a one-piece molded structure. A first annular block 361, a second annular block 362, and a third annular block 363 are machined onto the body. The first annular block 361 and the second annular block 362 are connected by multiple circumferentially spaced and extending first connecting blocks 371, forming a first connecting section 341 between adjacent first connecting blocks 371. The second annular block 362 and the third annular block 363 are connected by multiple circumferentially spaced and extending second connecting blocks 372, forming a second connecting section 351 between adjacent second connecting blocks 372. Both the first connecting blocks 371 and the second connecting blocks 372 are disposed within an annular cavity 33 and are staggered along the circumference of the annular cavity 33. This one-piece molded design eliminates assembly errors of multiple components by precisely machining three annular blocks supported by staggered circumferentially extending connecting blocks onto a single component, ensuring the dimensional accuracy and positional consistency of the upper and lower annular gaps. The staggered distribution of the connecting blocks provides stable support for each annular block, significantly improving the overall structural strength and resistance to deformation. The one-piece molding process reduces the number of parts, simplifies production processes, and improves processing efficiency and product yield, which is beneficial for large-scale production and cost control. The staggered, circumferentially extending connecting blocks naturally form circumferentially misaligned gas passages within the annular inner cavity 33, structurally realizing and strengthening the "alternating oxygen replenishment" effect, further promoting uniform gas mixing and smooth air replenishment, and enhancing flame stability and combustion efficiency.

[0043] refer to Figure 4 , Figure 9 In a preferred embodiment, the first connecting block 371 and the second connecting section 351 are aligned radially on the double-slit burner body, meaning the second connecting section 351 is located on the same radial straight line as the first connecting block 371. The second connecting block 372 is aligned with the first connecting section 341. This structural feature, building upon the already achieved "alternating oxygen replacement" and integral molding, further optimizes the mechanical support and airflow organization within the burner by precisely aligning the first connecting block 371 with the second connecting section 351 and the second connecting block 372 with the first connecting section 341 radially. On one hand, it enhances the structural support efficiency of the staggered connecting blocks for the annular block, improving overall rigidity; on the other hand, this alignment guides a smoother and more regular gas flow path within the annular cavity 33, promoting uniform gas distribution and pressure balance along the circumference, thereby strengthening the air supply effect between the staggered gaps and making combustion more stable and efficient.

[0044] refer to Figure 9In a preferred embodiment, the first connecting block 371 and the second connecting block 372 are sequentially and alternately connected along the circumference of the double-slit flame cap body. The first connecting block 371 extends and protrudes relative to the second connecting block 372 towards the axial direction of the flame cap, and the number of both the first connecting block 371 and the second connecting block 372 is at least three. This structure achieves the "alternating oxygen replacement" function while also possessing good structural performance and process adaptability.

[0045] refer to Figure 9 In a preferred embodiment, the second connecting block 372 has a plurality of spaced second openings 3721, which communicate with the lower annular gap 35; the first connecting block 371 includes a blocking block 381 and an opening block 382; the blocking block 381 is a closed structure that seals the gap so that it does not communicate with the annular inner cavity 33; to avoid poor flame propagation or flame detachment, the opening block 382 has a plurality of circumferentially spaced first openings 3711, which communicate with the upper annular gap 34 and the annular inner cavity 33; the blocking block 381 and the opening block 382 are alternately arranged circumferentially, and there are 4 blocking blocks 381, which are arranged opposite each other in pairs.

[0046] This structure achieves precise zoned control of gas flow by incorporating staggered and functionally differentiated connecting blocks (blocking blocks 381 and perforation blocks 382) within the integrally molded double-slit burner body. Specifically, the four blocking blocks 381 are positioned opposite each other in pairs, allowing their positions to precisely correspond to the four support feet of the cookware holder. At the blocking block 381, the corresponding upper annular gap 34 area is completely sealed, thereby eliminating the flame at this critical location and preventing the problems of localized high temperatures, incomplete combustion, and a significant increase in smoke generation caused by the continuous flame impacting the cookware holder, directly improving combustion cleanliness and thermal efficiency. Simultaneously, in the remaining areas, the perforation blocks 382 maintain the normal gas supply through the first perforation 3711, combined with the auxiliary ventilation of the lower annular gap 35 through the second perforation on the second connecting block 372, jointly ensuring uniform, stable, and efficient combustion of the circumferential flame of the annular burner. This design retains the advantages of annular slot burners while specifically addressing the inherent defects caused by pot support obstruction, achieving comprehensive optimization of structural strength, production convenience, combustion performance, and environmental indicators.

[0047] refer to Figure 6 , Figure 8In a preferred embodiment, the arc length of the first connecting section 341 is greater than the arc length of the second connecting section 351, and the width of the first connecting section 341, i.e., the width of the slit, is greater than the width of the second connecting section 351. By making the first connecting section 341 of the upper annular slit 34 larger in arc length and / or width than the second connecting section 351 of the lower annular slit 35, a clear functional zoning is achieved: the first connecting section 341 serves as the main burner, providing a wide flame band and the main heat load, while the smaller second connecting section 351 serves as both a main burner and a flame stabilizing burner, providing a stable and reliable ignition source and root support for the main flame. This differentiated design effectively improves combustion stability and anti-flameout capability, while promoting multi-level mixing of fuel gas and air, thereby optimizing combustion efficiency and uniformity while ensuring high heat load output.

[0048] refer to Figure 10-13 In a preferred embodiment, the double-slit flame cap structure is prepared by providing a blank having an annular inner cavity;

[0049] Concentric upper annular slits 34 and lower annular slits 35 are machined on the blank. Neither the upper annular slits 34 nor the lower annular slits 35 penetrate the inner wall of the blank, thus retaining an annular connecting body in the annular cavity.

[0050] The connector is divided radially into an inner first connector and an outer second connector;

[0051] Parts of the first connector are cut off at intervals along the circumference so that the upper annular gap 34 at that location communicates with the annular inner cavity to form the first connecting section 341, and the uncut portion forms the first connecting block 371;

[0052] Parts of the second connector are cut off at intervals along the circumference so that the lower annular gap 35 at that location communicates with the annular inner cavity, forming a second communicating section 351. The uncut portion forms a second connecting block 372.

[0053] Specifically, the radial position of cutting off the first connector corresponds to the radial position of retaining the second connector, and the radial position of cutting off the second connector corresponds to the radial position of retaining the first connector, thereby aligning the first connector block 371 with the second connecting section 351 in the radial direction, and aligning the second connector block 372 with the first connecting section 341 in the radial direction.

[0054] The double-slit flame cap manufacturing method provided by this invention avoids the cumbersome and unpredictable process of assembling multiple ring blocks into a double-ringed structure through welding or riveting. The manufacturing method of this invention, through a special process of alternating cutting of inner and outer blocks on a single integrated block, precisely and reliably achieves the forming of the upper and lower annular gaps and their intersecting connecting areas in a single processing step. This not only ensures the staggered distribution of flames to optimize combustion performance for air supply, but also avoids assembly errors, improves structural strength and production consistency, and significantly reduces the manufacturing cost and difficulty of complex stainless steel flame cap structures.

[0055] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0056] In the description of this specification, the references to terms such as "preferred embodiment," "another embodiment," "other embodiment," or "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. 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 a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0057] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A burner, characterized in that, The device includes a flame spreader, an outer ejector tube, an inner ejector tube, an outer flame cap, and an inner flame cap. The inner flame cap and / or the outer flame cap include a double-slit flame cap structure. The double-slit flame cap structure includes a double-slit flame cap body with an annular inner cavity. The double-slit flame cap body has an upper annular slit and a lower annular slit that are spaced apart and concentric along its axial direction. The upper annular slit has a plurality of circumferentially extending first connecting sections spaced apart in the circumferential direction. The lower annular slit has a plurality of circumferentially extending second connecting sections spaced apart in the circumferential direction. Both the first connecting sections and the second connecting sections are directly connected to the annular inner cavity, and the first connecting sections and the second connecting sections are staggered along the circumference of the double-slit flame cap body. The flame distributor is provided with an external gas flow channel and an internal gas flow channel. The annular inner cavity of the inner flame cap and the internal gas flow channel together form an annular internal gas passage. The annular inner cavity of the outer flame cap and the external gas flow channel together form an annular external gas passage. The external ejector tube is connected to the external gas passage, and the internal ejector tube is connected to the internal gas passage.

2. The burner as claimed in claim 1, characterized in that, The flame distributor includes a first ring wall, a second ring wall, a third ring wall, and a fourth ring wall arranged coaxially from the inside to the outside. The first ring wall and the second ring wall form the inner gas flow channel, and the third ring wall and the fourth ring wall form the outer gas flow channel. The double-slit flame cap body includes a first annular block, a second annular block, and a third annular block arranged radially from the inside out. An upper annular gap is formed between the first annular block and the second annular block, and a lower annular gap is formed between the second annular block and the third annular block. The first annular block is connected to the third annular wall, and the third annular block is connected to the fourth annular wall.

3. The burner as described in claim 2, characterized in that, The outer flame cap includes the double-slit flame cap structure, and the inner flame cap includes a lower ring block and an upper ring cap. A first annular gap is formed between the lower ring block and the upper ring cap. A second annular gap is formed on the lower ring block. A plurality of circumferentially spaced through holes are formed at the bottom of the second annular gap. The through holes communicate with the annular inner cavity. The lower ring block and the upper ring cap are fixedly connected by fasteners. A first groove is formed by a radial indentation on the lower ring block. A flame hole is formed on the first groove. The upper ring cap has a blocking block. The blocking block blocks the first groove axially. A second groove is formed by a recess in the second ring wall towards the first ring wall. The second groove is connected to the first groove.

4. The burner as described in claim 2, characterized in that, The first annular block has a fire-transfer slit, which extends radially along the body of the double-slit flame cap, and fire-transfer holes are provided on both sides of the fire-transfer slit.

5. The burner as claimed in claim 1, characterized in that, The double-slit flame cap body is a one-piece molded structure. A first annular block, a second annular block, and a third annular block are machined on the double-slit flame cap body. The first annular block and the second annular block are connected by a plurality of first connecting blocks arranged at intervals along the circumference, and a first connecting section is formed between two adjacent first connecting blocks. The second annular block and the third annular block are connected by a plurality of second connecting blocks arranged at intervals along the circumference, and a second connecting section is formed between two adjacent second connecting blocks. The first connecting blocks and the second connecting blocks are both disposed in the annular inner cavity and are staggered along the circumference of the annular inner cavity. The first connecting blocks and the second connecting blocks both extend along the circumference of the double-slit flame cap body.

6. The burner as described in claim 5, characterized in that, In the radial direction of the double-slit fire cap body, the first connecting block is aligned with the position of the second connecting section, and the second connecting block is aligned with the position of the first connecting section.

7. The burner as claimed in claim 5, characterized in that, The first connecting block and the second connecting block are sequentially and alternately connected along the circumference of the double-slit flame cap body. The first connecting block extends and protrudes relative to the second connecting block in the axial direction of the flame cap. The number of the first connecting block and the second connecting block is at least 3.

8. The burner as claimed in claim 5, characterized in that, The second connecting block has multiple spaced second openings, which communicate with the lower annular gap; the first connecting block includes a blocking block and an opening block; the blocking block blocks the communication between the upper annular gap and the annular inner cavity; the opening block has multiple circumferentially spaced first openings, which communicate with the upper annular gap and the annular inner cavity. The barrier blocks and the opening blocks are alternately arranged circumferentially, and there are 4 barrier blocks, which are arranged opposite each other in pairs.

9. The burner as claimed in claim 1, characterized in that, The arc length of the first connected segment is greater than the arc length of the second connected segment, and the width of the first connected segment is greater than the width of the second connected segment.

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