A fire distributor and burner thereof

Abstract

The present invention discloses a fire distributor and its burner, the fire distributor comprising: a fire distributor body, having an inner ring cavity and an outer ring cavity opening upward, the outer ring cavity being located outside the inner ring cavity; a first ventilation portion having a downward opening, arranged on the fire distributor body and located below the inner ring cavity and the outer ring cavity, the radial outer end of the top of the first ventilation portion being a closed end, and the radial inner end being an open end connected to the inner ring cavity; and a second ventilation portion having a downward opening, arranged on the fire distributor body and located below the inner ring cavity and the outer ring cavity, the radial inner end of the top of the second ventilation portion being a closed end, and the radial outer end being an open end connected to the outer ring cavity. The fire distributor of the present invention has a simple structure, can not only simultaneously distribute gas to the inner ring and the outer ring, but also increases the gas intake area of the inner ring and the outer ring.

Description

Technical Field

[0001] The present invention relates to the technical field of burners, in particular to a fire distributor and a burner thereof. Background Art

[0002] Most burners currently on the market have separate inner and outer flame caps. This allows the inner ring to receive secondary air, while preventing the inner and outer flames from interfering with each other, which can lead to incomplete combustion and increased smoke. Addressing the smoke problem by increasing the damper or raising the pot support reduces thermal efficiency, so a certain distance is set between the inner and outer rings. This creates a low-temperature zone between the inner and outer rings, resulting in uneven heating of the pot bottom. Especially when using a pointed pot, overflow can easily drip from the center of the burner, clogging the inner ring flame holes and affecting normal flame combustion. Clogged ignition sensor pins, in particular, can affect ignition success rate and sensitivity, making them difficult to clean and impacting the user experience.

[0003] Most integrated ignition distributors on the market have complex structures and typically only allow gas to flow through the outer or inner ring, not multiple rings simultaneously. While a few integrated ignition distributors can allow gas to flow through multiple rings, the unit ventilation area is small, which affects gas injection and combustion performance. Summary of the Invention

[0004] The present invention aims to at least partially address one of the problems existing in the prior art. To this end, the present invention provides a simple flame distributor that simultaneously distributes gas to both the inner and outer rings while increasing the gas intake area for both rings. The present invention also provides a burner.

[0005] According to the above-mentioned fire distributor, it is realized by the following technical solutions:

[0006] A fire divider comprises: a fire divider body, having an inner ring cavity and an outer ring cavity opening upward, the outer ring cavity being located outside the inner ring cavity; a first vent portion having a downward opening, arranged on the fire divider body and located below the inner ring cavity and the outer ring cavity, the radial outer end of the top of the first vent portion being a closed end, and the radial inner end being an open end connected to the inner ring cavity; and a second vent portion having a downward opening, arranged on the fire divider body and located below the inner ring cavity and the outer ring cavity, the radial inner end of the top of the second vent portion being a closed end, and the radial outer end being an open end connected to the outer ring cavity.

[0007] In some embodiments, the orthographic projections of the radially inner ends of the top of the first vent portion and the second vent portion are both located within the orthographic projection of the inner annular cavity, and the orthographic projections of the radially outer inner ends of the top of the first vent portion and the second vent portion are both located within the orthographic projection of the outer annular cavity.

[0008] In some embodiments, the closed end is higher than the open end, and / or the closed end is higher than the bottom surface of the inner annular cavity and the bottom surface of the outer annular cavity, respectively.

[0009] In some embodiments, a downwardly opening groove is formed between the closed end and the open end, and the groove side wall near the open end is opened to form a side opening, and the side opening is connected to the corresponding inner ring cavity or the outer ring cavity.

[0010] In some embodiments, a guide portion is provided at the bottom of the closed end, and the guide portion is used to guide the gas to the unsealed end.

[0011] In some embodiments, the guide portion is a guide block, which is integrally formed with the bottom of the closed end and the hole wall of the first / second ventilation portion arranged near it; or the guide portion is a guide plate, the fixed end of the guide plate is integrally formed with the closed end, and the free end extends obliquely downward.

[0012] In some embodiments, a limiting step is provided in the first ventilation portion and the second ventilation portion, and the limiting step is lower than the open end; or a plurality of positioning portions extending downward are fixedly provided at the bottom of the ignition divider body, and the positioning portions are located outside the first ventilation portion and the second ventilation portion.

[0013] In some embodiments, the ignition distributor body further has a central hole, which is located radially inward of the inner annular cavity and is coaxially arranged with the inner annular cavity.

[0014] In some embodiments, a clearance portion is provided on the radial inner side of the inner annular cavity.

[0015] According to the burner provided above, it is realized by the following technical solution:

[0016] A burner, characterized in that it comprises: an ignition divider as described above; a burner head, arranged at the bottom of the ignition divider, the burner head being fixedly provided with an inner ring air outlet extending upward and connected to the first air outlet at a position corresponding to the first air vent, and the burner head being fixedly provided with an outer ring air outlet extending upward and connected to the second air vent at a position corresponding to the second air vent; and a fire cover, which is arranged on the top of the ignition divider and has an inner mixing chamber and an outer mixing chamber opening downward, an inner fire hole group and an outer fire hole group being provided on the fire cover, the inner fire hole group being connected to the inner ring chamber through the inner mixing chamber, and the outer fire hole group being connected to the outer ring chamber through the outer mixing chamber.

[0017] In some embodiments, the fire cover is an integrated fire cover, the outer fire hole group is arranged on the outer side wall of the integrated fire cover, and the inner fire hole group is arranged on the inner side wall or radially inner side of the top of the integrated fire cover.

[0018] In some embodiments, the outer fire hole group includes a plurality of straight fire holes connected to the outer air mixing chamber, and all of the straight fire holes are circumferentially spaced apart on the outer side wall of the integrated fire cover; the inner fire hole group includes a plurality of grooves connected to the inner air mixing chamber, and all of the grooves are circumferentially spaced apart on the radial inner side of the top of the integrated fire cover, and the radial inner end of each groove passes through the upper end of the inner side wall of the integrated fire cover.

[0019] In some embodiments, an ignition assembly is further included, wherein a concave area recessed radially outward is provided at the lower end of the inner wall of the fire cover, and an ignition hole group is provided at a position of the fire cover corresponding to the concave area, and the concave area is connected to the inner gas mixing chamber through the ignition hole group; the ignition assembly is installed on the burner head, and its ignition part extends into the concave area.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects:

[0021] The ignition divider of the present invention is provided with a coaxially arranged inner ring cavity and outer ring cavity on the ignition divider body, and a first ventilation portion and a second ventilation portion are provided on the ignition divider body. The first ventilation portion spans the inner ring cavity and the outer ring cavity, and its radial inner end is designed to be an open end connected to the inner ring cavity. The second ventilation portion spans the inner ring cavity and the outer ring cavity, and its radial inner end is designed to be an open end connected to the outer ring cavity. Compared with the existing ignition divider, its structure is simple, not only can it distribute gas to the inner ring and the outer ring at the same time, but also effectively increases the air intake area of the inner ring and the outer ring gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of a firearm in an embodiment of the present invention. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the structure of a firearm in an embodiment of the present invention. Figure 2 ;

[0024] Figure 3 is a cross-sectional view of a fire distributor according to an embodiment of the present invention;

[0025] Figure 4 1 is a schematic structural diagram of a burner in an embodiment of the present invention;

[0026] Figure 5 This is a schematic structural diagram of a burner without a fire cover in an embodiment of the present invention;

[0027] Figure 6This is a schematic structural diagram of a burner in accordance with an embodiment of the present invention;

[0028] Figure 7 This is a schematic structural diagram of a fire cover according to an embodiment of the present invention;

[0029] Figure 8 This is a schematic structural diagram of a two-point firearm according to an embodiment of the present invention;

[0030] Figure 9 This is a schematic diagram of the structure of the 2 burners in the embodiment of the present invention;

[0031] Figure 10 This is a cross-sectional view of a 3-point firearm according to an embodiment of the present invention. Figure 1 ;

[0032] Figure 11 This is a cross-sectional view of a 3-point firearm according to an embodiment of the present invention. Figure 2 .

[0033] In the figure: 1-fire distributor, 11-fire distributor body, 111-inner ring cavity, 112-outer ring cavity, 113-center hole, 12-first vent, 121-top inner air outlet, 122-closed end, 13-second vent, 131-top outer air outlet, 14-groove, 141-side opening, 151-guide block, 152-guide plate, 153-limiting step, 16-air avoidance portion;

[0034] 2-burner head, 21-inner ring air outlet, 22-outer ring air outlet, 23-installation position; 3-fire cover, 301-inclined surface, 311-inner mixing chamber, 312-groove, 321-outer mixing chamber, 322-straight fire hole, 33-concave area, 34-ignition hole; 4-ignition assembly. DETAILED DESCRIPTION

[0035] The following examples illustrate the present invention, but the present invention is not limited to these examples. Modifications to the specific embodiments of the present invention or equivalent replacements of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed in the present invention.

[0036] Example 1

[0037] refer to Figure 1-3 This embodiment provides an ignition distributor. The ignition distributor 1 includes an ignition distributor body 11, a first vent 12 for allowing outer ring gas to pass through, and a second vent 13 for allowing inner ring gas to pass through. The ignition distributor body 11 has a central hole 113, an upwardly opening inner ring cavity 111, and an upwardly opening outer ring cavity 112. The inner ring cavity 111 is disposed between the outer ring cavity 112 and the central hole 113 and is coaxially arranged with each other.

[0038] At least one first ventilation portion 12 is provided on the ignition divider body 11 and is located below the inner ring cavity 111 and the outer ring cavity 112. In this way, the first ventilation portion 12 spans the inner ring cavity 111 and the outer ring cavity 112 at the same time, ensuring that the first ventilation portion 12 has a larger unit ventilation area. The first air vent 12 has a downward opening, that is, the bottom of the first air vent 12 is open to form a bottom inner air inlet. Since the first air vent 12 itself spans the inner annular cavity 111 and the outer annular cavity 112, when its bottom is opened, the unit air intake area of the bottom inner air inlet is increased; the radial outer end of the top of the first air vent 12 is a closed end, that is, the top of the first air vent 12 is closed at a position corresponding to the outer annular cavity 112, and the radial inner end is an open end connected to the inner annular cavity 111, that is, the top of the first air vent 12 is open at a position corresponding to the inner annular cavity 111 to form a top inner air outlet 121, and the first air vent 12 is connected to the inner annular cavity 111 through the top inner air outlet 121. It can be seen that by making the first ventilation portion 12 span the inner ring cavity 111 and the outer ring cavity 112, and designing the radial inner end of the first ventilation portion 12 as an open end, the ignition divider can supply gas to the inner ring while increasing the air intake area of the inner ring gas, which is beneficial to improving the inner ring gas injection performance.

[0039] The ignition source body 11 is provided with a plurality of second vents 13 located below the inner and outer annular cavities 111 and 112. This allows the second vents 13 to span both the inner and outer annular cavities 111 and 112, ensuring a larger unit ventilation area. The second vents 13 are downwardly open, with their bottoms open to form a bottom external air inlet. Since the second vents 13 span the inner and outer annular cavities 111 and 112, their bottoms open to increase the unit air inlet area. The radially inner ends of the second vents 13 are closed, meaning they are closed at the location corresponding to the inner annular cavity, while the radially outer ends are open, connecting to the outer annular cavity. The second vents 13 are open at the location corresponding to the outer annular cavity 112 to form a top external air outlet 131, through which the second vents 13 communicate with the outer annular cavity 112. It can be seen that by making the second ventilation portion 13 span the inner ring cavity 111 and the outer ring cavity 112, and designing the radial outer end of the second ventilation portion 13 as an open end, the ignition divider can supply gas to the outer ring while increasing the air intake area of the outer ring gas, which is beneficial to improving the outer ring gas injection performance.

[0040] In this embodiment, four vents are evenly spaced along the circumference of the ignition distributor body 11. One vent is the first vent 12, and the other three are the second vents 13. The three second vents 13 work together to achieve more even distribution of the outer ring gas, ensuring more complete combustion and a more uniform combustion flame. Furthermore, the orthographic projections of the radially inner ends of the tops of the first vent 12 and the second vent 13 are both located within the orthographic projection of the inner ring cavity 111, and the orthographic projections of the radially outer inner ends of the tops of the first vent 12 and the second vent 13 are both located within the orthographic projection of the outer ring cavity 112, effectively ensuring that the first vent 12 and the second vent 13 span the inner and outer ring cavities. Both the first vent 12 and the second vent 13 are cylindrical.

[0041] refer to Figure 1-3 In this embodiment, the closed end 122 is higher than the open end, and the closed end 122 is higher than the bottom surface of the inner ring cavity 111 and the bottom surface of the outer ring cavity 112, respectively. A downward-opening groove 14 is formed between the closed end 122 and the open end. The top surface of the groove 14 is higher than the open end, and the side wall of the groove 14 near the open end is open to form a side opening 141. The side opening 141 is connected to the corresponding inner ring cavity 111 / outer ring cavity 112. Therefore, the top inner air outlet 121 cooperates with the side opening 141 to further increase the ventilation area entering the inner ring cavity 111, and at the same time, airflow in two directions can be formed, ensuring more uniform inner ring gas. The top outer air outlet 131 cooperates with the side opening 141 to further increase the ventilation area entering the outer ring cavity 112, and at the same time, airflow in two directions can be formed, ensuring more uniform outer ring gas. Furthermore, the lower end of the side opening 141 is directly connected to the open end and together they form an L-shape to further increase the air outlet area. Of course, the side opening 141 can also be designed not to be directly connected to the open end, that is, the open end and the side opening 141 are spaced apart.

[0042] In order to reliably fix and limit the installation of the fire divider, a limiting step 153 is provided in each of the first vent portion 12 and the second vent portion 13. The limiting step 153 is annular and lower than the open end. In this way, by utilizing the vent portions, the fire divider can be reliably fixed and installed on the burner. Of course, it is also possible to instead integrally form a plurality of downwardly extending positioning portions (not shown in the figure) at the bottom of the fire divider body 1, the positioning portions being located outside the first vent portion and the second vent portion for fixing and limiting the burner.

[0043] refer to Figure 1-2In this embodiment, the ignition distributor 1 further includes a clearance portion 16 , which is provided radially inwardly of the inner annular cavity 111 and communicates with the central hole 113 . This clearance portion 16 is configured to allow the ignition assembly 4 to pass vertically therethrough, thereby allowing the ignition assembly 4 to be partially or completely concealed by the ignition cover. Of course, the clearance portion 16 may be omitted, in which case the ignition assembly 4 is configured to pass vertically therethrough through the central hole 113 .

[0044] refer to Figure 4-7 This embodiment further provides a burner, which includes an ignition distributor, a burner head 2, and a fire cover 3 as described above. The burner head 2 is arranged at the bottom of the ignition distributor 1. An inner ring air outlet 21 extending upward and communicating with the first air vent 12 is fixedly provided at a position of the burner head 2 corresponding to the first air vent 12. The inner ring gas can flow into the inner ring cavity 111 of the ignition distributor 1 through the inner ring air outlet 21 and the first air vent 12 in sequence. An outer ring air outlet 22 extending upward and communicating with the second air vent 13 is fixedly provided at a position of the burner head 2 corresponding to the second air vent 13. The outer ring gas can flow into the outer ring cavity 112 of the ignition distributor 1 through the outer ring air outlet 22 and the second air vent 13 in sequence. The fire cover 3 is arranged on the top of the fire distributor 1, and has an inner gas mixing chamber 311 and an outer gas mixing chamber 321 opening downwards. An inner fire hole group and an outer fire hole group are provided on the fire cover 3. The inner fire hole group is connected to the inner ring chamber 111 through the inner gas mixing chamber 311, and the outer fire hole group is connected to the outer ring chamber 112 through the outer gas mixing chamber 321.

[0045] In this embodiment, the fire cover 3 is an integrated fire cover, with the outer fire hole group arranged on the outer side wall of the integrated fire cover, and the inner fire hole group arranged on the inner side wall or radially inward of the top of the integrated fire cover. In this way, through the cooperation of the integrated fire cover and the fire distributor 1, the inner ring air outlet 21 and the outer ring air outlet 22 of the burner are both hidden under the burner, making the burner more beautiful and better looking. Because there is no central inner fire cover, when overflow drips from the middle of the burner to the top of the liquid receiving tray, the user only needs to pick up the fire distributor 1 and the integrated fire cover to complete the cleanup, making it easier to clean.

[0046] The top of the integrated fire cover includes a top surface and an inclined surface 301 arranged from the outside to the inside in the radial direction. The top surface can be a small plane parallel to the horizontal plane, or an outer inclined surface arranged from the inside to the outside and inclined downward or curved. The inclined surface 301 is inclined from the inside to the outside and upward. The inner fire hole group includes a plurality of grooves 312 connected to the inner mixing chamber 311. All the grooves 312 are evenly spaced along the circumferential direction on the inclined surface 301 of the integrated fire cover. The radial inner end of each groove 312 passes through the upper end of the inner side wall of the integrated fire cover. In this way, while increasing the outlet area of the inner ring fire, the inner ring fire is made into a rotary fire, which is beneficial to improving thermal efficiency. The outer fire hole group includes a plurality of straight fire holes 322 connected to the outer mixing chamber 321. All the straight fire holes 322 are circumferentially spaced on the outer side wall of the integrated fire cover. In this way, the outer ring fire is a straight fire. It can be seen that by arranging the inner fire hole group and the outer fire hole group at different positions of the integrated fire cover, the inner and outer ring flames will not interfere with each other. When the burner is ignited and burning, the inner ring fire is a flame inclined inward, most of the inner ring fire spreads inward, and a small part spreads outward. In addition, the flame of the outer ring fire is outward, cooperating with the inner ring flame, so that the bottom of the pot is heated evenly and there is no low-temperature zone.

[0047] refer to Figure 4-7 The burner also includes an ignition assembly 4. A radially outwardly recessed area 33 is provided at the lower end of the inner sidewall of the fire cover 3. An ignition hole group 34 is provided at a position corresponding to the recessed area 33. The recessed area 33 communicates with the inner gas mixing chamber 311 through the ignition hole group 34. By concealing the ignition hole group 34 within the recessed area 33, the ignition holes are prevented from being blocked by overflow, thereby improving the ignition success rate and flame sensing sensitivity. The ignition assembly 4 is mounted on the burner 2 and extends through the ignition distributor 1. Both the ignition portion and the flame sensing portion extend into the recessed area 33.

[0048] Example 2

[0049] refer to Figure 8-9 This embodiment differs from Embodiment 1 in that the number of first ventilation portions 12 and second ventilation portions 13 is different. In this embodiment, there are two first ventilation portions 12 and two second ventilation portions 13, each located at opposite ends of the fire distributor body 1. Correspondingly, the burner head 2 is provided with two inner ring air outlets 21 and two outer ring air outlets 22. The two inner ring air outlets 21 are respectively connected to the two first ventilation portions 12, and the two outer ring air outlets 22 are respectively connected to the two second ventilation portions 13.

[0050] In other embodiments, the first ventilation portions 12 and the second ventilation portions 13 may also be designed to be staggered. In this way, compared with the two first ventilation portions 12 and the two second ventilation portions 13 being located at opposite ends of the ignition divider body 1, the inner ring gas entering the inner ring cavity 111 along the two first ventilation portions 12 and the outer ring gas entering the outer ring cavity 112 along the two second ventilation portions 13 are more evenly distributed, which is beneficial to improving the uniformity of gas distribution.

[0051] Example 3

[0052] This embodiment differs from Embodiments 1 or 2 in the structure of the ignition distributor 1. In this embodiment, the ignition distributor 1 further includes a guide portion (not shown) located at the bottom of each closed end 122. This guide portion is used to quickly direct the gas flowing into the vents to the unsealed end. Thus, when the gas entering the first or second vents is transported upward toward the bottom of the closed end 122, the guide portion can quickly direct this gas to the unsealed end.

[0053] The specific structure of the guide part includes but is not limited to any of the following:

[0054] The first one, reference Figure 10 The guide portion is a guide block 151, which is integrally formed with the bottom of the closed end 122 and the hole wall of the first / second vent portion arranged near it. The side of the guide block 151 facing the open end or side opening 141 is an arc-shaped surface or an inclined surface.

[0055] The second one, reference Figure 11 The guide part is a guide plate 152, the fixed end of the guide plate 152 is integrally formed with the closed end 122, and the free end extends obliquely downward. The free end (i.e., the lower end) of the guide plate 152 is gap-fitted or abutted with the hole wall of the first / second ventilation part.

[0056] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. A fire dispenser, characterized in that: include: The fire distributor body (11) has an inner ring cavity (111) and an outer ring cavity (112) that are open upwards, wherein the outer ring cavity (112) is located outside the inner ring cavity (111); as well as A first vent portion (12) with a downward opening is provided on the ignition distributor body (11) and is located below the inner annular cavity (111) and the outer annular cavity (112); the radial outer end of the top of the first vent portion (12) is a closed end, and the radial inner end is an open end communicating with the inner annular cavity (111); and a second vent portion (13) with a downward opening, which is arranged on the ignition distributor body (11) and located below the inner ring cavity (111) and the outer ring cavity (112), wherein the radial inner end of the top of the second vent portion (13) is a closed end, and the radial outer end is an open end communicating with the outer ring cavity (112); The orthographic projections of the radial inner ends of the top of the first vent portion (12) and the top of the second vent portion (13) are both located within the orthographic projection of the inner annular cavity (111), and the orthographic projections of the radial outer inner ends of the top of the first vent portion (12) and the top of the second vent portion (13) are both located within the orthographic projection of the outer annular cavity (112); The closed end is higher than the open end, and / or the closed end is respectively higher than the bottom surface of the inner annular cavity (111) and the bottom surface of the outer annular cavity (112).

2. A fire distributor according to claim 1, characterized in that: A groove (14) opening downward is formed between the closed end and the open end, and a groove side wall of the groove (14) close to the open end is opened to form a side opening (141), and the side opening (141) is connected to the corresponding inner ring cavity (111) or the outer ring cavity (112).

3. A fire distributor according to claim 1 or 2, characterized in that: A guide portion is provided at the bottom of the closed end, and the guide portion is used to guide the gas to the open end.

4. A fire distributor according to claim 3, characterized in that: The guide portion is a guide block (151), and the guide block (151) is integrally formed with the bottom of the closed end and the hole wall of the first / second vent portion arranged close thereto; or The guide portion is a guide plate (152), the fixed end of the guide plate (152) and the closed end are integrally formed, and the free end extends obliquely downward.

5. A fire distributor according to claim 1, 2 or 4, characterized in that: A limiting step (153) is provided in each of the first ventilation portion (12) and the second ventilation portion (13), and the limiting step (153) is lower than the open end; or a plurality of positioning portions extending downward are fixedly provided at the bottom of the ignition divider body (11), and the positioning portions are located outside the first ventilation portion (12) and the second ventilation portion.

6. The ignition distributor according to claim 1, characterized in that: The ignition distributor body (11) further comprises a central hole (113), wherein the central hole (113) is located radially inward of the inner annular cavity (111) and is coaxially arranged with the inner annular cavity (111).

7. A fire distributor according to claim 1 or 6, characterized in that: A clearance portion (16) is provided on the radial inner side of the inner annular cavity (111).

8. A burner, characterized in that: include: A fire distributor according to any one of claims 1 to 7; A burner head (2) is provided at the bottom of the fire distributor, wherein the burner head (2) is fixedly provided with an inner ring air outlet (21) extending upward and communicating with the first air vent (12) at a position corresponding to the first air vent (12), and an outer ring air outlet (22) extending upward and communicating with the second air vent (13) at a position corresponding to the second air vent (13); and A fire cover (3) is provided on the top of the fire distributor and has an inner gas mixing chamber (311) and an outer gas mixing chamber (321) opening downwards. An inner fire hole group and an outer fire hole group are provided on the fire cover (3). The inner fire hole group is connected to the inner ring chamber (111) through the inner gas mixing chamber (311), and the outer fire hole group is connected to the outer ring chamber (112) through the outer gas mixing chamber (321).

9. A burner according to claim 8, characterized in that: The fire cover (3) is an integrated fire cover, the outer fire hole group is arranged on the outer side wall of the integrated fire cover, and the inner fire hole group is arranged on the inner side wall or the radial inner side of the top of the integrated fire cover.

10. A burner according to claim 9, characterized in that: The outer fire hole group includes a plurality of straight fire holes (322) connected to the outer gas mixing chamber (321), and all the straight fire holes (322) are circumferentially spaced apart on the outer side wall of the integrated fire cover; the inner fire hole group includes a plurality of grooves (312) connected to the inner gas mixing chamber (311), and all the grooves (312) are circumferentially spaced apart on the radial inner side of the top of the integrated fire cover, and the radial inner end of each groove (312) passes through the upper end of the inner side wall of the integrated fire cover.

11. A burner according to any one of claims 8 to 10, characterized in that: It also includes an ignition assembly (4), wherein a concave area (33) recessed radially outward is provided at the lower end of the inner side wall of the fire cover (3), and an ignition hole group is provided at a position corresponding to the concave area (33), and the concave area (33) is connected to the inner gas mixing chamber (311) through the ignition hole group; the ignition assembly (4) is installed on the burner head (2), and its ignition part (41) extends into the concave area (33).

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