Burner and burner

Abstract

The utility model provides a furnace end and a burner, and belongs to the technical field of gas stoves, the furnace end comprises a furnace end body, an injection pipe assembly and a flow guide structure, the furnace end body is sequentially provided with an air channel, an inner ring gas mixing cavity and an outer ring gas mixing cavity from inside to outside along the center of the furnace end body; the injection pipe assembly comprises a first injection pipe, the gas outlet end of the first injection pipe is connected to a gas inlet of the outer ring gas mixing cavity, the flow guide structure comprises a flow guide cavity communicating between the gas outlet end of the first injection pipe and the outer ring gas mixing cavity, and the flow guide cavity comprises a gas inlet part and a gas guide part; the gas inlet part is columnar, a gas outlet corresponding to the outer ring gas mixing cavity is formed in the top of the gas inlet part, and the gas guide part is connected between the gas outlet of the gas inlet part and the gas inlet of the outer ring gas mixing cavity. No secondary air channel is arranged on the periphery of the burner, the burner is low in height and high in injection and gas mixing capacity, and fuel gas and air are mixed more evenly.

Description

Technical Field

[0001] The utility model relates to the technical field of gas stoves, and particularly relates to a burner head and a burner. Background Art

[0002] The burner head is an important structural component of the burner. Its function is to introduce gas from the gas nozzle and eject air from the burner head inlet, and mix the air and gas and introduce them into the gas distribution plate to make the velocity and pressure of the mixed gas as uniform as possible. For the existing integrated burner head, its combustion efficiency is improved by providing a secondary air channel on its periphery. However, this design will make the height of the burner head relatively high, which in turn leads to the problem of increased depth of the bottom shell of the cooker, not only increasing the material consumption and manufacturing cost, but also having an adverse impact on the installation, appearance, etc. of the cooker. Although the height of the burner head can be reduced by canceling the secondary air channel on the periphery of the burner head, this will also reduce the combustion rate of the burner head. Summary of the Utility Model

[0003] The first technical problem to be solved by the utility model is to provide a burner head without a secondary air channel on the periphery, with a lower height, strong ejecting and gas mixing capabilities, and more uniform mixing of gas and air, in view of the current situation of the prior art.

[0004] The second technical problem to be solved by the utility model is to provide a burner having the above burner head.

[0005] The technical solution adopted by the utility model to solve the above first technical problem is: a burner head, the burner head comprising:

[0006] A burner head body, which is successively provided with an air channel, an inner ring gas mixing cavity and an outer ring gas mixing cavity from the inside to the outside along its center;

[0007] An ejector tube assembly, comprising a first ejector tube, and the air outlet end of the first ejector tube is connected to the air inlet of the outer ring gas mixing cavity;

[0008] A flow guiding structure, comprising a flow guiding cavity communicating between the air outlet end of the first ejector tube and the air inlet of the outer ring gas mixing cavity. The flow guiding cavity comprises an air inlet part and a gas guiding part. The air inlet part is columnar and its top is provided with an air outlet corresponding to the outer ring gas mixing cavity, and the gas guiding part is connected between the air outlet of the air inlet part and the air inlet of the outer ring gas mixing cavity.

[0009] According to an embodiment of the present utility model, the air guiding part includes an outer side wall, an inner side wall, and two arc-shaped walls symmetrically connected between the outer side wall and the inner side wall. The outer side wall is connected to a side of the air outlet of the air inlet part away from the inner ring mixing chamber, the inner side wall is connected to a side of the air outlet of the air inlet part close to the inner ring mixing chamber, the inner side wall includes an inclined section and an arc-shaped section. One end of the inclined section is connected to the air outlet of the air inlet part, and the other end inclines inward and upward and is connected to the first end of the arc-shaped section. The second end of the arc-shaped section is connected to the air inlet of the outer ring mixing chamber to guide the gas in the air inlet part to the outer ring mixing chamber.

[0010] According to an embodiment of the present utility model, the outlet area of the air guiding part gradually increases along the air flow direction.

[0011] According to an embodiment of the present utility model, the flow guiding structure further includes a flow guiding plate, which is connected to the inner wall of the outer ring mixing chamber and is located above the air outlet of the air inlet part. The flow guiding plate is provided with a plurality of uniformly distributed flow guiding holes.

[0012] According to an embodiment of the present utility model, the flow guiding chamber further includes a buffer part, which is connected to an end of the air inlet part away from the first ejector tube.

[0013] According to an embodiment of the present utility model, a flow guiding inclined surface is provided at the air inlet end of the inner ring mixing chamber, and the flow guiding inclined surface is inclined upward along the inner wall of the inner ring mixing chamber.

[0014] The technical solution adopted by the present utility model to solve the above first technical problem is: a burner, the burner includes:

[0015] A burner head as described in any one of the above first aspects;

[0016] A fire cap assembly, covering the top of the burner head, including an outer fire cap covering the top of the outer ring mixing chamber and an inner fire cap provided at the top of the inner ring mixing chamber. The outer fire cap and the inner fire cap are integrally formed, and an air supplement channel corresponding to the air channel is provided in the middle of the inner fire cap;

[0017] An ignition needle, connected to a side of the outer ring mixing chamber close to the inner ring mixing chamber, and its top passes through the outer fire cap.

[0018] According to an embodiment of the present utility model, the outer fire cap includes a first cover plate and a first annular wall connected to the lower side outside the first cover plate;

[0019] The inner fire cover includes a second annular wall and a third annular wall connected above the inner side of the first cover plate, and a second cover plate connected between the second annular wall and the third annular wall. The second annular wall is disposed on the outer periphery of the third annular wall.

[0020] Wherein, the first annular wall is provided with outer fire holes and outer flame transmission holes communicating with the outer ring mixing cavity, the second annular wall is provided with inner fire holes communicating with the inner ring mixing cavity, the outer periphery of the second cover plate is recessed inward to form a groove with the notch facing outward, and inner flame transmission holes are provided in the side wall of the groove close to the inner ring mixing cavity.

[0021] According to an embodiment of the present invention, a raised portion is provided at the top of the first cover plate near the ignition needle. The raised portion is connected between the first annular wall and the second annular wall. A plurality of uniformly distributed first flame transmission holes are provided on the top surface of the raised portion. A first flame transmission groove communicating with at least two of the first flame transmission holes is provided on one side of the raised portion close to the first annular wall. At least one of the outer fire holes is located below the first flame transmission groove.

[0022] According to an embodiment of the present invention, the burner further includes:

[0023] An anti-overflow assembly connected to the inner fire cover, including an anti-overflow plate. The anti-overflow plate shields the air outlet end of the air supply channel, and there is a gap between the anti-overflow plate and the inner fire cover so that the air supply channel communicates with the outside.

[0024] Compared with the prior art, the present invention has the following advantages or beneficial effects:

[0025] The burner of the present invention not only has no secondary air channel on the periphery and is of low height, but also has strong injection and mixing capabilities, making the mixing of gas and air more uniform.

[0026] The burner of the present invention not only has the technical effects of the above burner, but also the fire cover assembly integrates the functions of a conventional inner fire cover and an outer fire cover, has good integrity, no cleaning dead corners, is easier to clean, and provides a good user experience. In addition, the air supply channel in the middle of the inner fire cover and the air channel on the burner can form a complete secondary air supply channel for the burner to provide a certain amount of secondary air for gas combustion. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] By referring to the accompanying drawings and describing its exemplary embodiments in detail, the above and other features and advantages of the present invention will become more apparent.

[0028] Figure 1 It is a schematic diagram of a burner shown according to an exemplary embodiment.

[0029] Figure 2 is a top view of a burner head shown according to an exemplary embodiment.

[0030] Figure 3 is a schematic connection diagram of a burner head body and an ignition pin shown according to an exemplary embodiment.

[0031] Figure 4 is Figure 3 a cross-sectional view in the AA direction.

[0032] Figure 5 is Figure 3 a cross-sectional view in the BB direction.

[0033] Figure 6 is Figure 3 a cross-sectional view in the CC direction.

[0034] Figure 7 is an axonometric view of a burner head body and an ignition pin shown according to an exemplary embodiment.

[0035] Figure 8 is a schematic diagram of a burner shown according to an exemplary embodiment.

[0036] Figure 9 is a first schematic diagram of a burner cap assembly shown according to an exemplary embodiment.

[0037] Figure 10 is a longitudinal sectional view of a burner cap assembly shown according to an exemplary embodiment.

[0038] Figure 11 is a second schematic diagram of a burner cap assembly shown according to an exemplary embodiment. Description of the Drawings:

[0040] 1. Burner head body; 10. Air passage; 11. Inner ring mixing chamber; 111. Flow guiding inclined surface; 12. Outer ring mixing chamber; 13. Mounting block; 131. Step hole;

[0041] 2. Ejector tube assembly; 21. First ejector tube; 22. Second ejector tube;

[0042] 3. Flow guiding structure; 31. Flow guiding chamber; 311. Air inlet part; 312. Air guiding part; 3121. Outer side wall; 3122. Inner side wall; 31221. Inclined section; 31222. Arc section; 3123. Arc wall; 313. Buffer part; 32. Flow guiding plate; 321. Flow guiding hole;

[0043] 4. Burner cap assembly; 41. Outer burner cap; 411. First cover plate; 4111. Protrusion; 4112. First flame transfer hole; 4113. First flame transfer groove; 412. First annular wall; 4121. Outer flame hole; 4122. Outer flame transfer hole; 42. Inner burner cap; 421. Second annular wall; 4211. Inner flame hole; 422. Third annular wall; 423. Second cover plate; 4231. Groove; 4232. Inner flame transfer hole; 43. Air supply channel;

[0044] 5. Ignition needle;

[0045] 6. Anti-overflow assembly; 61. Anti-overflow plate; 62. Gap. Detailed implementation manners

[0046] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this utility model will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote the same or similar structures, and thus their detailed descriptions will be omitted.

[0047] The terms "a", "an", "the", etc. are used to denote the presence of one or more elements / components / etc.; the terms "comprising" and "having" are used to mean an open inclusion and mean that there may be additional elements / components / etc. in addition to the listed elements / components / etc.

[0048] An embodiment of the present utility model provides a burner head, as Figure 1-7 shown, the burner includes a burner head body 1, an ejector tube assembly 2, and a flow guiding structure 3. An air passage 10, an inner ring mixing chamber 11, and an outer ring mixing chamber 12 are sequentially provided in the burner head body 1 from the inside to the outside along its center; the ejector tube assembly 2 includes a first ejector tube 21, and the outlet end of the first ejector tube 21 is connected to the inlet of the outer ring mixing chamber 12; the flow guiding structure 3 includes a flow guiding chamber 31 communicating between the outlet of the first ejector tube 21 and the outer ring mixing chamber 12. The flow guiding chamber 31 includes an air inlet portion 311 and an air guiding portion 312. The air inlet portion 311 is columnar and has an air outlet corresponding to the outer ring mixing chamber 12 at its top, and the air guiding portion 312 is connected between the air outlet of the air inlet portion 311 and the inlet of the outer ring mixing chamber 12. The burner head of this application cancels the peripheral secondary air passage, and by providing an air passage 10 for supplementing secondary air in the middle thereof, the height of the burner head is reduced, and the appearance of the product is improved.

[0049] In addition, the intake part 311 of the present application is columnar and has an air outlet at its top. The entire intake part 311 is in a canyon shape and corresponds to the outlet of the first ejector tube 21, which can reduce the resistance to the gas-air mixture entering here from the first ejector tube 21 and make the flow smoother. The air guiding part 312 is connected between the intake part 311 and the outer ring mixing chamber 12, enabling the gas and air to be further mixed well here, making it more uniform, with a higher primary air coefficient, thereby reducing the demand for secondary air during combustion. Through the above structure, the burner head of the present application not only has no secondary air channel on the periphery and is of low height, but also has strong ejecting and mixing capabilities, making the gas and air mix more evenly, with a higher primary air coefficient and good combustion efficiency.

[0050] In a preferred embodiment of the present utility model, as Figure 1-6 shown, the outlet area of the air guiding part 312 gradually increases along the air flow direction, enabling a smooth transition from the intake part 311 to the outer ring mixing chamber 12. Moreover, the volume and outlet area of the outer ring mixing chamber 12 are relatively large, enabling the gas and air to be further mixed well here, making it more uniform and having a higher primary air coefficient.

[0051] In a preferred embodiment of the present utility model, as Figure 1-6 shown, the air guiding part 312 includes two arc-shaped walls 3123, namely an outer side wall 3121 and an inner side wall 3122. The outer side wall 3121 is connected to the side of the air outlet of the intake part 311 far from the inner ring mixing chamber 11, and the inner side wall 3122 is connected to the side of the air outlet of the intake part 311 close to the inner ring mixing chamber 11. The two arc-shaped walls 3123 are symmetrically connected between the outer side wall 3121 and the inner side wall 3122. The inner side wall 3122 includes an inclined section 31221 and an arc-shaped section 31222. One end of the inclined section 31221 is connected to the air outlet of the intake part 311, and the other end inclines inward and upward and is connected to the first end of the arc-shaped section 31222. The second end of the arc-shaped section 31222 is connected to the air inlet of the outer ring mixing chamber 12 to guide the gas in the intake part 311 to the outer ring mixing chamber 12. The inner side wall 3122 of the present application inclines upward and inward from the air outlet of the intake part 311, not only making the outlet area of the air guiding part 312 gradually increase along the air flow direction, but also guiding and smoothly transitioning from the intake part 311 to the outer ring mixing chamber 12, reducing the air flow resistance and improving the mixing effect.

[0052] In a preferred embodiment of the present utility model, as Figure 1-10The shown flow guiding structure 3 further includes a flow guiding plate 32. The flow guiding plate 32 is connected to the inner wall of the outer ring gas mixing chamber 12 and is located above the air outlet of the air inlet part 311. The flow guiding plate 32 is provided with a plurality of uniformly distributed flow guiding holes 321. Through the flow guiding plate 32, the flow rate of the gas and air mixture entering the outer ring gas mixing chamber 12 from the air inlet part 311 can be reduced, so that the flow rate field and pressure field of the gas and air mixture in the outer ring gas mixing chamber 12 are more uniform and the primary air coefficient is high, thereby reducing the demand for secondary air in combustion, enabling no secondary air channel to be provided around the burner head, and further reducing the height of the burner head.

[0053] In a preferred embodiment of the present invention, the fuel-air mixture enters the outer ring gas chamber from the outer ring ejector tube, so that the fuel-air mixture in the outer ring gas chamber... Figure 1-4 As shown in FIGS. 5 and 7, the flow guiding chamber 31 further includes a buffer part 313. The buffer part 313 is connected to one end of the air inlet part 311 far from the first ejector tube 21. The buffer part 313 in the present application can slow down the flow rate of the gas input by the air inlet part 311, make the air and gas mix evenly, make the primary air coefficient high, and thus reduce the demand for secondary air in combustion.

[0054] In a preferred embodiment of the present invention, as... Figure 1-3 As shown in FIGS. 6-7, the air inlet end of the inner ring gas mixing chamber 11 is provided with a flow guiding inclined surface 111. The flow guiding inclined surface 111 is inclined upward along the inner wall of the inner ring gas mixing chamber 11. The ejector tube assembly 2 further includes a second ejector tube 22 connected to the inner ring gas mixing chamber 11. The flow guiding inclined surface 111 extends obliquely upward from the air outlet end of the second ejector tube 22 in a direction away from it, so that the fuel-air mixture entering the inner ring gas mixing chamber 11 from the second ejector tube 22 can flow upward more smoothly and mix more evenly, and the primary air coefficient is higher.

[0055] An embodiment of the present invention provides a burner, as... Figure 1-11 As shown, the burner includes the burner head, the fire cap assembly 4 and the ignition needle 5 as described above. The fire cap assembly 4 covers the top of the burner head. The ignition needle 5 is connected to one side of the outer ring gas mixing chamber 12 close to the inner ring gas mixing chamber 11, and its top penetrates through the outer fire cap 41. The fire cap assembly 4 includes an outer fire cap 41 covering the top of the outer ring gas mixing chamber 12 and an inner fire cap 42 arranged on the top of the inner ring gas mixing chamber 11. The outer fire cap 41 and the inner fire cap 42 are integrally formed. Compared with the conventional separate inner fire cap and outer fire cap, the present application not only has the technical effects of the above-mentioned burner head, but also the fire cap assembly 4 integrates the functions of the inner fire cap 42 and the outer fire cap 41, can cooperate with the burner head to form a complete outer ring gas chamber and inner ring gas chamber, has good integrity, no cleaning dead corners, is easier to clean, has a high product life, and provides a good user experience. The air supplement channel 43 in the middle of the inner fire cap 42 and the air channel 10 on the burner head can form a complete secondary air supplement channel of the burner to provide a certain amount of secondary air for gas combustion.

[0056] Preferably, on one side of the outer ring gas mixing chamber 12 close to the inner ring gas mixing chamber 11, there is an installation block 13 for installing the ignition needle 5. A stepped hole 131 is formed in the installation block 13. The top of the ignition needle 5 passes through the stepped hole 13, and the outer periphery of the upper part of the ignition needle 5 abuts against the step of the stepped hole 131, realizing the limitation and fixation of the ignition needle 5.

[0057] In a preferred embodiment of the present invention, as Figure 8-11 shown, the outer fire cover 41 includes a first cover plate 411 and a first annular wall 412 connected to the lower side of the outer side of the first cover plate 411. The inner side of the first cover plate 411 is connected to the top of the inner wall of the outer ring gas mixing chamber 12, and the first annular wall 412 is connected to the top of the outer wall of the outer ring gas mixing chamber 12; the inner fire cover 42 includes a second annular wall 421, a third annular wall 422 connected to the upper side of the inner side of the first cover plate 411, and a second cover plate 423 connected between the second annular wall 421 and the third annular wall 422. The second annular wall 421 is arranged on the outer periphery of the third annular wall 422; wherein, the first annular wall 412 is provided with an outer fire hole 4121 and an outer flame transfer hole 4122 communicating with the outer ring gas mixing chamber 12, the second annular wall 421 is provided with an inner fire hole 4211 communicating with the inner ring gas mixing chamber 11, and the outer periphery of the second cover plate 423 is recessed inward to form a groove 4231 with the notch facing outward. An inner flame transfer hole 4232 is formed in the side wall of the groove 4231 close to the inner ring gas mixing chamber 11. It can be seen from this application that by arranging the outer fire hole 4121 and the outer flame transfer hole 4122 on the first annular wall 412, the inner flame transfer hole 4232 on the second annular wall 421, and the inner flame transfer hole 4232 on the outer periphery of the second cover plate 423, it is not only not easily blocked, but also can prevent the overflow liquid from entering the burner, reducing the cleaning dead angle and improving the user experience.

[0058] In a preferred embodiment of the present invention, as Figure 8 、 9, a raised portion 4111 is provided near the ignition pin 5 at the top of the first cover plate 411 shown in FIG. 11. The raised portion 4111 is connected between the first annular wall 412 and the second annular wall 421. A plurality of uniformly distributed first fire-transfer holes 4112 are formed on the top surface of the raised portion 4111. A first fire-transfer groove 4113 communicating at least two of the first fire-transfer holes 4112 is formed on one side of the raised portion 4111 close to the first annular wall 412. At least one outer fire hole 4121 is located below the first fire-transfer groove 4113. Preferably, in this application, the raised portion 4111 extends along the radial direction of the inner fire cover 42. Inner fire-transfer holes 4232 and outer fire holes 4121 are respectively provided at the inner and outer ends of the raised portion 4111. When the ignition pin 5 is ignited, the inner fire-transfer holes 4232 are first ignited, and then the fire is transmitted outward through the plurality of first fire-transfer holes 4112 to the outer fire holes 4121. The first fire-transfer groove 4113 can slow down the flame transmission speed by communicating with a plurality of first fire-transfer holes 4112 located outside the raised portion 4111, realizing the instantaneous ignition of the inner and outer fires and improving the ignition efficiency.

[0059] In a preferred embodiment of the present utility model, as Figure 8-9 shown, the burner further includes an anti-overflow assembly 6 connected to the inner fire cover 42. The anti-overflow assembly 6 includes an anti-overflow plate 61. The anti-overflow plate 61 shields the air outlet end of the air supply channel 43, and there is a gap 62 between the anti-overflow plate 61 and the inner fire cover 42, so that the air supply channel 43 communicates with the outside. In this application, the diameter of the anti-overflow plate 61 is larger than the diameter of the air supply channel 43. The anti-overflow plate 61 can be connected to the inner top of the third annular wall 422 through one or more support rods so that there is a gap 62 between the anti-overflow plate 61 and the inner fire cover 42, which not only ensures the supply of secondary air but also can prevent the water or soup in the pot, hereinafter referred to as overflow liquid, from overflowing into the central air channel of the burner, making the product cleaner and easier to clean.

[0060] Preferably, the top surface of the anti-overflow plate 61 is conical, so that the liquid falling on the anti-overflow plate 61 can quickly flow to the outside of the fire cover 4 or even the burner, avoiding the air supply channel 43 being polluted by overflow liquid and the like.

[0061] In the embodiments of the present utility model, the term "plurality" refers to two or more, unless otherwise clearly defined. Terms such as "installation", "connection", and "fixation" should all be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0062] In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present utility model.

[0063] In the description of this specification, the description of terms such as "one embodiment", "one preferred embodiment", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0064] The above are only the preferred embodiments of the embodiments of the present utility model, and are not used to limit the embodiments of the present utility model. For those skilled in the art, the embodiments of the present utility model can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the embodiments of the present utility model shall be included within the protection scope of the embodiments of the present utility model.

Claims

1. A burner head, characterized in that: include: The furnace head body (1) is provided with an air passage (10), an inner ring gas mixing chamber (11) and an outer ring gas mixing chamber (12) in sequence from the inside to the outside along the center thereof; An ejector tube assembly (2) comprises a first ejector tube (21), wherein the gas outlet end of the first ejector tube (21) is connected to the gas inlet of the outer ring gas mixing chamber (12); The flow guiding structure (3) comprises a flow guiding chamber (31) connected between the gas outlet end of the first ejector tube (21) and the outer ring gas mixing chamber (12), the flow guiding chamber (31) comprising an air inlet portion (311) and an air guiding portion (312), the air inlet portion (311) being columnar and having an air outlet corresponding to the outer ring gas mixing chamber (12) formed on its top, and the air guiding portion (312) being connected between the air outlet of the air inlet portion (311) and the air inlet of the outer ring gas mixing chamber (12).

2. The burner head according to claim 1, characterized in that: The air guide portion (312) comprises an outer wall (3121), an inner wall (3122) and two arc-shaped walls (3123) symmetrically connected between the outer wall (3121) and the inner wall (3122), wherein the outer wall (3121) is connected to a side of the air outlet of the air inlet portion (311) away from the inner ring air mixing chamber (11), and the inner wall (3122) is connected to a side of the air outlet of the air inlet portion (311) close to the inner ring air mixing chamber (11). On the inner side, the inner side wall (3122) includes an inclined section (31221) and an arc section (31222), one end of the inclined section (31221) is connected to the air outlet of the air inlet portion (311), and the other end is inclined inwardly and upwardly and connected to the first end of the arc section (31222), and the second end of the arc section (31222) is connected to the air inlet of the outer ring mixing chamber (12) to guide the gas in the air inlet portion (311) to the outer ring mixing chamber (12).

3. The burner head according to claim 1, characterized in that: The air outlet area of ​​the air guide portion (312) gradually increases along the air flow direction.

4. The burner head according to claim 1, characterized in that: The guide structure (3) further comprises a guide plate (32), wherein the guide plate (32) is connected to the inner wall of the outer ring mixing chamber (12) and is located above the air outlet of the air inlet portion (311), and the guide plate (32) is provided with a plurality of evenly distributed guide holes (321).

5. The burner head according to claim 1, characterized in that: The flow guiding cavity (31) further comprises a buffer portion (313), wherein the buffer portion (313) is connected to an end of the air inlet portion (311) away from the first ejector tube (21).

6. The burner head according to claim 5, characterized in that: The air inlet end of the inner ring air mixing chamber (11) is provided with a flow guiding inclined surface (111), and the flow guiding inclined surface (111) is arranged to be inclined upward along the inner wall of the inner ring air mixing chamber (11).

7. A burner, characterized in that: include: The burner head according to any one of claims 1 to 6; A fire cover assembly (4) is arranged on the top of the burner head, comprising an outer fire cover (41) arranged on the top of the outer ring gas mixing chamber (12) and an inner fire cover (42) arranged on the top of the inner ring gas mixing chamber (11), wherein the outer fire cover (41) and the inner fire cover (42) are integrally formed, and an air supplement channel (43) corresponding to the air channel (10) is provided in the middle of the inner fire cover (42); An ignition needle (5) is connected to a side of the outer ring gas mixing chamber (12) close to the inner ring gas mixing chamber (11), and a top portion thereof passes through the outer ignition cover (41).

8. The burner according to claim 7, characterized in that The outer fire cover (41) comprises a first cover plate (411) and a first annular wall (412) connected to the lower outer side of the first cover plate (411); The inner fire cover (42) comprises a second annular wall (421) connected to the upper inner side of the first cover plate (411), a third annular wall (422), and a second cover plate (423) connected between the second annular wall (421) and the third annular wall (422), wherein the second annular wall (421) is arranged on the outer periphery of the third annular wall (422); The first annular wall (412) is provided with an outer fire hole (4121) and an outer fire transfer hole (4122) connected to the outer annular air mixing chamber (12); the second annular wall (421) is provided with an inner fire hole (4211) connected to the inner annular air mixing chamber (11); the outer circumference of the second cover plate (423) is recessed inward to form a groove (4231) with a notch facing outward; the groove (4231) is provided with an inner fire transfer hole (4232) on a side wall close to the inner annular air mixing chamber (11).

9. The burner according to claim 8, characterized in that A protrusion (4111) is provided on the top of the first cover plate (411) near the ignition needle (5), and the protrusion (4111) is connected between the first annular wall (412) and the second annular wall (421). A plurality of evenly distributed first fire transfer holes (4112) are provided on the top surface of the protrusion (4111), and a first fire transfer groove (4113) connecting at least two of the first fire transfer holes (4112) is provided on one side of the protrusion (4111) near the first annular wall (412), wherein at least one of the external fire holes (4121) is located below the first fire transfer groove (4113).

10. The burner according to claim 7, characterized in that Also includes: An anti-overflow assembly (6) is connected to the inner fire cover (42), and comprises an anti-overflow plate (61). The anti-overflow plate (61) blocks the air outlet of the air replenishment channel (43), and a gap (62) is provided between the anti-overflow plate (61) and the inner fire cover (42), so that the air replenishment channel (43) is connected to the outside.

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