Combustor and gas stove

Abstract

The invention belongs to the technical field of gas stoves, and discloses a combustor and a gas stove.The combustor comprises a base and a fire cover arranged on the base in a covering mode, the fire cover comprises an inner ring part, an outer ring part and a middle protruding part, the inner ring part is located on the radial inner side of the outer ring part, and the middle protruding part is connected between the top end of the inner ring part and the top end of the outer ring part; the middle protruding part comprises an inner side wall and an outer side wall, a second fire hole is formed in the outer side wall, a third fire hole is formed in the inner side wall, the middle protruding part is provided with a through air supplementing channel, one end of the air supplementing channel extends towards the inner ring part, and the other end of the air supplementing channel extends to the outer side wall; the outer ring inclined face gradually extends in an inclined mode from bottom to top in the direction close to the middle protruding part and is connected with the outer side wall, and a first fire hole penetrating through the outer ring inclined face is formed in the outer ring part. According to the combustor, the radial size of the fire cover is reduced while combustion sufficiency is guaranteed, secondary air supplementation is better conducted on flames of the middle ring, and the heat efficiency and the use safety of a gas stove are improved.

Description

Technical Field

[0001] This invention relates to the field of gas stove technology, and more particularly to burners and gas stoves. Background Technology

[0002] A gas stove is a kitchen appliance that uses direct flame heating through the combustion of gaseous fuel. A gas stove typically includes a burner, which comprises a base and a flame cap mounted on the base. Gaseous fuel flows out through flame holes on the flame cap and is ignited to form a flame. Existing technology provides a burner with a three-ring flame. The outer ring flame is vertically positioned and surrounds the outer periphery of an annular protrusion. The outer ring flame is located on the outer wall of the flame cap, while the inner and central ring flames are located on the inclined walls on either side of the annular protrusion, arranged sequentially from the outside in. To ensure complete combustion, adjacent flame rings are spaced radially apart, which increases the radial dimension of the flame cap and raises costs. Furthermore, secondary air replenishment for the inner ring burner is more difficult. After the replenishment air outside the burner is partially consumed by the outer ring burner, it flows away directly due to the obstruction of the outer wall. The replenishment air in the center needs to bypass the top of the annular protrusion to reach the inner ring burner. The path is longer, and the replenishment is not timely. Moreover, a portion of it is consumed by the central ring burner first. When secondary air replenishment for the inner ring burner is difficult, it can cause problems such as flame lift-off or backfire, reduced thermal efficiency, and even the production of dangerous carbon monoxide gas, affecting the safety of gas stove use. Summary of the Invention

[0003] One object of the present invention is to provide a burner that can solve the problems of the large radial dimension of the burner cap, the increased cost, and the difficulty of secondary air replenishment in the middle inner ring of the existing three-ring burner.

[0004] To achieve this objective, the present invention employs the following technical solution:

[0005] A burner is provided, including a base and a flame cap covering the base. The flame cap includes an inner ring, an outer ring, and a central protrusion. The inner ring is located radially inside the outer ring. The central protrusion connects the top ends of the inner ring and the outer ring. The central protrusion includes an inner wall and an outer wall. A second flame hole is formed on the outer wall, and a third flame hole is formed on the inner wall. The central protrusion has a through-flow gas supply channel. One end of the gas supply channel extends toward the inner ring and the other end extends to the outer wall. The outer ring includes an outer ring slope that gradually slopes upward toward the central protrusion and connects to the outer wall. The outer ring has a first flame hole penetrating the outer ring slope.

[0006] In one embodiment, the central protrusion has a groove to form the gas supply channel, the length of the groove extending radially along the flame cap and extending to the outer side wall and the inner side wall at both ends, respectively.

[0007] In one embodiment, the groove is formed by a first groove wall and a second groove wall disposed opposite to each other, one end of the first groove wall and one end of the second groove wall being connected to each other to form the bottom of the groove, and the first groove wall and the second groove wall being disposed at an angle to make the groove a V-shaped groove.

[0008] In one embodiment, the bottom of the groove is gradually inclined downward from the outer sidewall to the inner sidewall; and / or,

[0009] The bottom of the groove is located above the second fire hole; and / or,

[0010] Multiple second flame holes are provided on the outer side wall, forming multiple groups of second flame holes. Each group of second flame holes includes multiple second flame holes. Along the radial direction of the flame cap, the groove is aligned with the group of second flame holes. Along the circumferential direction of the flame cap, multiple second flame holes of the group of second flame holes are located between the first groove wall and the second groove wall.

[0011] In one embodiment, a plurality of second fire holes are provided on the outer side wall, a plurality of third fire holes are provided on the inner side wall, and the middle protrusion has a plurality of air supply channels;

[0012] Along the circumference of the burner cap, a plurality of third burner holes are spaced apart, and a plurality of second burner holes are spaced apart. The second burner holes and the third burner holes are staggered. The gas supply channel is located between two adjacent third burner holes and faces the second burner holes.

[0013] In one embodiment, the flame cap further includes a mounting portion connected to the outer ring portion, the mounting portion being used to connect to the base, and a flame stabilizing ring groove being formed between the top surface of the mounting portion and the bottom surface of the outer ring portion, the flame stabilizing ring groove being connected to the first flame hole.

[0014] In one embodiment, the flame cap is placed on the base to form a gas mixing chamber, and the mounting part has a through supplementary gas hole, one end of which is connected to the gas mixing chamber and the other end of which is connected to the flame stabilizing ring groove.

[0015] In one embodiment, the diameter of the first flash hole is D1, and the diameter of the second flash hole is D2, where D1 = 1.2 * D2 ~ 2.3 * D2; and / or,

[0016] The angle between the outer ring inclined plane and the horizontal plane is 15° to 30°; and / or,

[0017] The angle between the outermost wall and the horizontal plane is 30° to 60°; and / or,

[0018] The angle between the inner sidewall and the horizontal plane is 30° to 60°; and / or,

[0019] The inner sidewall and the outer sidewall are arranged at an angle, and the inner sidewall and the outer sidewall gradually approach each other from bottom to top.

[0020] Another objective of this invention is to provide a gas stove with a burner that solves the problems of large radial dimensions of the burner cap, increased cost, and difficulty in secondary air replenishment of the inner ring flame in existing three-ring burners, thereby improving the thermal efficiency and safety of the gas stove.

[0021] To achieve this objective, the present invention employs the following technical solution in another aspect:

[0022] A gas stove is provided, including a burner as described above. The gas stove also includes an energy-concentrating plate, which is arranged around the outer periphery of the burner, and a secondary air supply channel is formed between the energy-concentrating plate and the burner.

[0023] In one embodiment, the inner peripheral edge of the energy-concentrating disk is not higher than the top of the central protrusion of the burner.

[0024] The beneficial effects of this invention are:

[0025] The burner provided by this invention has a flame cap comprising an inner ring, an outer ring, and a central protrusion. The inner ring is located radially inside the outer ring. The central protrusion connects the top ends of the inner and outer rings. The central protrusion includes an inner wall and an outer wall. A second flame hole is formed on the outer wall, and a third flame hole is formed on the inner wall. The central protrusion has a through-flow gas supply channel, one end of which extends towards the inner ring, and the other end extends to the outer wall. The outer ring includes an outer ring slope that gradually slopes upwards towards the central protrusion and connects to the outer wall. A first flame hole penetrates the outer ring slope. In this embodiment, the first, second, and third flame holes on the flame cap create three concentric rings of flame arranged from the outside in, ensuring complete combustion and achieving uniform heating of the cookware over a wide area. The outer ring of the burner features a sloping outer surface that gradually extends upwards towards the central protrusion, with the top of the outer ring connecting to the outer wall. This creates a significant height difference between the outermost and middle ring flames, ensuring complete combustion without requiring a large radial distance between them. This allows for a reduction in the burner's radial dimensions and lowers manufacturing costs. Furthermore, the sloping outer ring does not obstruct the second burner orifice. Part of the air from the outside of the burner supplies the first burner orifice, while the remaining air flows directly to the outer wall and supplies the second burner orifice, improving its combustion efficiency. Additionally, the air supply channel running through the central protrusion diverts some of the air from the inner ring to the outer wall, providing more supplementary air for the second burner orifice. This ensures complete combustion in all three rings of flame, preventing flame lift-off, flashback, and reduced thermal efficiency caused by insufficient secondary air supply, and minimizing the risk of carbon monoxide and other harmful gases.

[0026] The gas stove provided by this invention includes the aforementioned burner. Its secondary air supply channel provides stable secondary air supply to the burner. The outermost and middle ring flames do not need to form a large radial distance, which can ensure complete combustion. This is beneficial for reducing the radial size of the burner and lowering processing costs. Moreover, the air supply channel that runs through the middle protrusion can guide part of the air in the middle of the inner ring to the outer wall, avoiding problems such as flame lift-off or backfire and reduced thermal efficiency caused by insufficient secondary air supply. This reduces the risk of generating harmful gases such as carbon monoxide, improves the thermal efficiency of the gas stove, and enhances its safety. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the burner provided in an embodiment of the present invention;

[0028] Figure 2 This is a structural cross-sectional view of the burner provided in an embodiment of the present invention;

[0029] Figure 3 yes Figure 2 A magnified view of part A in the middle;

[0030] Figure 4 This is a schematic diagram of the structure of the gas stove provided in an embodiment of the present invention;

[0031] Figure 5 This is a structural cross-sectional view of the gas stove provided in an embodiment of the present invention;

[0032] Figure 6 yes Figure 5 A magnified view of part B in the diagram.

[0033] In the picture:

[0034] 1. Base; 2. Flame cap; 21. Inner ring; 22. Outer ring; 221. Outer ring bevel; 23. Central protrusion; 231. Inner wall; 232. Outer wall; 233. Groove; 234. First groove wall; 235. Second groove wall; 241. First flame hole; 242. Second flame hole; 243. Third flame hole; 25. Mounting part; 251. Flame stabilizing ring groove; 252. Supplementary air hole; 253. Mixing chamber;

[0035] 10. Energy Concentration Plate; 100. Secondary Air Supply Channel. Detailed Implementation

[0036] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, 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 limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0039] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0040] like Figures 1 to 3 As shown, this embodiment first provides a burner, which includes a base 1 and a flame cover 2 disposed on the base 1. The burner provides heat energy through the combustion of gas for heating cookware.

[0041] The flame cap 2 includes an inner ring portion 21, an outer ring portion 22, and a central protrusion portion 23. The inner ring portion 21 is located radially inside the outer ring portion 22. The central protrusion portion 23 connects the top ends of the inner ring portion 21 and the outer ring portion 22. The central protrusion portion 23 includes an inner wall 231 and an outer wall 232. A second flame hole 242 is provided on the outer wall 232, and a third flame hole 243 is provided on the inner wall 231. The central protrusion portion 23 has a through air supply channel. One end of the air supply channel extends toward the inner ring portion 21, and the other end extends to the outer wall 232. The outer ring portion 22 includes an outer ring inclined surface 221. The outer ring inclined surface 221 gradually extends from bottom to top toward the central protrusion portion 23 and connects with the outer wall 232. The outer ring portion 22 has a first flame hole 241 that penetrates the outer ring inclined surface 221. In this embodiment, the first flame hole 241, the second flame hole 242, and the third flame hole 243 provided on the burner cap 2 form three rings of flame arranged from the outside in, ensuring complete combustion and achieving uniform heating of the cookware over a wide area. The outer ring portion 22's outer ring slope 221 gradually slopes upwards towards the central protrusion 23, and the top of the outer ring portion 22 connects to the outer side wall 232. This results in a significant height difference between the outermost and middle ring flames, allowing for complete combustion without a large radial distance between them. This helps reduce the radial dimensions of the burner and lowers manufacturing costs. Furthermore, the inclined outer ring slope 221 does not obstruct the second flame hole 242. Part of the air from the outside of the burner is supplied to the first flame hole 241, while the remaining air flows directly to the outer side wall 232 and supplies the second flame hole 242, improving the combustion completeness of the second flame hole 242. In addition, the air supply channel through the middle protrusion 23 can guide part of the air in the middle of the inner ring 21 to the outer wall 232, thereby providing more supplementary air for the combustion of the second flame hole 242. This ensures that the three rings of flames arranged from the outside to the inside can form complete combustion, avoiding problems such as flame lift-off or backfire and reduced thermal efficiency caused by insufficient secondary supplementary air, and reducing the risk of generating harmful gases such as carbon monoxide.

[0042] In one embodiment, the central protrusion 23 has a groove 233 to form a gas supply channel. The length of the groove 233 extends radially along the flame cap 2, and its two ends extend to the outer side wall 232 and the inner side wall 231, respectively. The way the gas supply channel is formed by the groove 233 is that, on the one hand, the gas supply channel is relatively open, which is conducive to more air being supplied; on the other hand, the groove-shaped structure is easy to process.

[0043] Specifically, the groove 233 is formed by a first groove wall 234 and a second groove wall 235 that are disposed opposite to each other, such as Figure 1As shown. One end of the first groove wall 234 and one end of the second groove wall 235 are connected to each other to form the bottom of the groove 233. The first groove wall 234 and the second groove wall 235 are set at an angle to make the groove 233 a V-shaped groove. The V-shaped groove structure is conducive to gathering air and has better guidance on the direction of air flow.

[0044] In one embodiment, the bottom of the groove 233 is gradually inclined downward from the outer side wall 232 to the inner side wall 231. Since the air in the middle of the inner ring 21 is supplied from below the burner, the groove 233 is inclined downward at one end toward the center of the burner, which facilitates guiding more air in the middle of the inner ring 21 into the air supply channel.

[0045] The bottom of the groove 233 is located above the second flame hole 242. The combustion flame formed by the second flame hole 242 extends upward. The bottom of the groove 233 is aligned with the top of the second flame hole 242, which can better supplement oxygen to the incompletely burned gas, especially to supplement the outer layer of the flame, and promote the further oxidation of residual carbon particles and intermediate products.

[0046] In one embodiment, a plurality of second flame holes 242 are provided on the outer wall 232, forming multiple groups of second flame holes. Each group of second flame holes includes multiple second flame holes 242. Along the radial direction of the flame cap 2, the groove 233 is aligned with the group of second flame holes. Along the circumference of the flame cap 2, the multiple second flame holes 242 of the group of second flame holes are located between the first groove wall 234 and the second groove wall 235. In this way, the multiple groups of second flame holes on the outer wall 232 can each have a corresponding air supply channel to provide supplementary air. Moreover, each second flame hole 242 is within the air supply coverage area of ​​the air supply channel, ensuring that the middle ring flame can receive stable supplementary air along the entire circumference of the flame cap 2.

[0047] Multiple second flame holes 242 are provided on the outer sidewall 232, and multiple third flame holes 243 are provided on the inner sidewall 231. The central protrusion 23 has multiple gas supply channels. Along the circumference of the burner cap 2, the multiple third flame holes 243 are spaced apart, and the multiple second flame holes 242 are also spaced apart. The second flame holes 242 and third flame holes 243 are staggered. The gas supply channels are located between adjacent third flame holes 243 and face towards the second flame holes 242. In one embodiment, when multiple second flame holes 242 form a group of second flame holes, multiple third flame holes 243 form a group of third flame holes. These groups of third flame holes are spaced apart, and the gas supply channels are located between adjacent groups of third flame holes and face towards a group of second flame holes that is staggered with the third flame hole groups. The staggered arrangement of the second and third flame hole groups ensures uniform flame distribution, thereby guaranteeing uniform heating of the cookware over a wide area.

[0048] In one embodiment, the flame cap 2 further includes a mounting portion 25 connected to the outer ring portion 22. The mounting portion 25 is used to connect to the base 1. A flame stabilizing ring groove 251 is formed between the top surface of the mounting portion 25 and the bottom surface of the outer ring portion 22. The flame stabilizing ring groove 251 communicates with the first flame hole 241. The axial direction of the first flame hole 241 is inclined. While extending inside the outer ring portion 22, the first flame hole 241 can communicate with the flame stabilizing ring groove 251 located at the bottom of the outer ring portion 22. The flame stabilizing ring groove 251 provides a stable annular flame at the bottom of the outer ring portion 22, thereby playing a flame stabilizing role.

[0049] The burner cap 2 is mounted on the base 1 to form a mixing chamber 253. The mounting portion 25 has a through-hole vent 252, one end of which connects to the mixing chamber 253 and the other end to the flame stabilizing ring groove 251. The vent 252 guides the mixed gas in the mixing chamber 253 into the flame stabilizing ring groove 251, ensuring the stability of combustion within the flame stabilizing ring groove 251. In one embodiment, the axial direction of the vent 252 extends along the height direction of the burner.

[0050] The diameter of the first burner hole 241 is D1, and the diameter of the second burner hole 242 is D2, where D1 = 1.2 * D2 to 2.3 * D2. Because the secondary air supply at the first burner hole 241 is relatively sufficient, when the ratio of the diameter of the first burner hole 241 to the diameter of the second burner hole 242 is in the range of 1.2 to 2.3, the outermost first burner hole 241 can eject more mixed gas. The mixed gas and the secondary air continue to mix to form a fully combusted flame, ensuring a high flame intensity on the outermost ring and uniform heating of the cookware edges. For example, D1 includes, but is not limited to, 1.2 * D2, 1.5 * D2, 1.6 * D2, 1.8 * D2, 2 * D2, and 2.3 * D2.

[0051] In one embodiment, the angle between the outer ring inclined surface 221 and the horizontal plane is 15° to 30°. When the angle between the outer ring inclined surface 221 and the horizontal plane is within this range, the first flame hole 241 and the second flame hole 242 form a sufficient height difference in the vertical direction to ensure the completeness of their respective combustion. Figure 3 As shown in the figure, angle α is the angle between the outer ring inclined plane 221 and the horizontal plane, which does not exceed 30°. An excessively large angle will cause the combustion flame to tilt at a large angle, which is not conducive to the stability of combustion. For example, the angle between the outer ring inclined plane 221 and the horizontal plane includes, but is not limited to, 15°, 16°, 17°, 18°, 20°, 25°, 30°, etc.

[0052] In one embodiment, the angle between the outer sidewall 232 and the horizontal plane is 30° to 60°. For example... Figure 3As shown in the figure, angle β is the angle between the outer wall 232 and the horizontal plane. When angle β is in the range of 30° to 60°, the second flame hole 242 and the first flame hole 241 form a sufficient height difference in the height direction. The larger the angle between the outer wall 232 and the horizontal plane, the greater the height difference between the second flame hole 242 and the first flame hole 241. However, the angle between the outer wall 232 and the horizontal plane should not exceed 60° to avoid the combustion flame tilting angle being too large. For example, the angle between the outer wall 232 and the horizontal plane includes, but is not limited to, 30°, 31°, 32°, 35°, 40°, 50°, and 60°.

[0053] In one embodiment, the angle between the inner sidewall 231 and the horizontal plane is 30° to 60°. For example... Figure 3 As shown in the figure, angle γ is the angle between the inner wall 231 and the horizontal plane. When angle γ is in the range of 30° to 60°, the third flame hole 243 and the second flame hole 242 can form a certain distance in the radial direction to ensure the stability of their respective combustion and reduce mutual interference.

[0054] The inner wall 231 and the outer wall 232 are set at an angle, and the inner wall 231 and the outer wall 232 gradually approach each other from bottom to top. This arrangement makes the middle protrusion 23 appear as a ridge, which helps to accelerate the flow of overflow from the top of the protrusion 13 to the bottom, reducing the risk of overflow entering the fire cap 2.

[0055] The present invention further provides a gas stove, which includes a burner as described in any of the above embodiments, such as... Figure 4 and Figure 5 As shown. The gas stove also includes an energy-concentrating plate 10, which is arranged around the outer periphery of the burner. A secondary air supply channel 100 is formed between the energy-concentrating plate 10 and the burner, as shown. Figure 6 As shown. The energy-concentrating plate 10 is used to provide stable support for the cookware.

[0056] The secondary air supply channel 100 provides a stable supply of secondary air to the burner. The burner, through the first flame hole 241, second flame hole 242, and third flame hole 243 on the burner cap 2, forms three concentric rings of flame arranged from the outside in, ensuring complete combustion and achieving uniform heating of the cookware over a wide area. The outer ring portion 22's outer ring slope 221 gradually slopes upwards towards the central protrusion 23, and its top end connects to the outer wall 232. This results in a significant height difference between the outermost and middle ring flames, allowing for complete combustion without a large radial distance between them, thus reducing the burner's radial dimensions and manufacturing costs. Furthermore, the inclined outer ring slope 221 does not obstruct the second flame hole 242. Part of the air from the outside of the burner supplies the first flame hole 241, while the remaining air flows directly to the outer wall 232 and supplies the second flame hole 242, improving the combustion completeness of the second flame hole 242. In addition, the air supply channel through the middle protrusion 23 can guide part of the air in the middle of the inner ring 21 to the outer wall 232, thereby providing more supplementary air for the combustion of the second burner 242. This ensures that all three rings of flames arranged from the outside to the inside can form complete combustion, avoiding problems such as flame lift-off or backfire and reduced thermal efficiency caused by insufficient secondary air supply. It also reduces the risk of generating harmful gases such as carbon monoxide, improves the thermal efficiency of the gas stove, and enhances its safety.

[0057] The inner peripheral edge of the energy-concentrating disc 10 is not higher than the top of the central protrusion 23 of the burner, such as Figure 6 As shown in the diagram, H1 represents the secondary air supply channel 100. Part of the air flows along this channel to supply the first flame hole 241, while the remaining air flows to the second flame hole 242 on the outer wall 232. If the inner circumferential edge of the energy-concentrating disk 10 is too high, it will affect the secondary air supply at the second flame hole 242.

[0058] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A burner, comprising a base (1) and a flame cover (2) disposed on the base (1), characterized in that, The flame cap (2) includes an inner ring (21), an outer ring (22), and a central protrusion (23). The inner ring (21) is located radially inside the outer ring (22). The central protrusion (23) connects the top ends of the inner ring (21) and the outer ring (22). The central protrusion (23) includes an inner wall (231) and an outer wall (232). A second flame hole (242) is provided on the outer wall (232), and a third flame hole (242) is provided on the inner wall (231). 43) The middle protrusion (23) has a through air supply channel. One end of the air supply channel extends toward the inner ring (21), and the other end extends to the outer wall (232). The outer ring (22) includes an outer ring slope (221). The outer ring slope (221) gradually extends from bottom to top toward the middle protrusion (23) and connects with the outer wall (232). The outer ring (22) has a first fire hole (241) that penetrates the outer ring slope (221).

2. The burner according to claim 1, characterized in that, The middle protrusion (23) has a groove (233) to form the air supply channel. The length of the groove (233) extends radially along the flame cap (2) and its two ends extend to the outer side wall (232) and the inner side wall (231) respectively.

3. The burner according to claim 2, characterized in that, The groove (233) is formed by a first groove wall (234) and a second groove wall (235) arranged opposite to each other. One end of the first groove wall (234) and one end of the second groove wall (235) are connected to each other to form the bottom of the groove (233). The first groove wall (234) and the second groove wall (235) are arranged at an angle so that the groove (233) is a V-shaped groove.

4. The burner according to claim 3, characterized in that, The bottom of the groove (233) is gradually inclined downward from the outer sidewall (232) to the inner sidewall (231); and / or, The bottom of the groove (233) is located above the second fire hole (242); and / or, The outer wall (232) is provided with a plurality of second flame holes (242), and the plurality of second flame holes (242) form a plurality of second flame hole groups. Each group of second flame holes includes a plurality of second flame holes (242). Along the radial direction of the flame cap (2), the groove (233) is aligned with the second flame hole group. Along the circumference of the flame cap (2), the plurality of second flame holes (242) of the second flame hole group are located between the first groove wall (234) and the second groove wall (235).

5. The burner according to claim 1, characterized in that, The outer sidewall (232) is provided with a plurality of second fire holes (242), the inner sidewall (231) is provided with a plurality of third fire holes (243), and the middle protrusion (23) has a plurality of air supply channels; Along the circumference of the burner cap (2), a plurality of third burner holes (243) are spaced apart, and a plurality of second burner holes (242) are spaced apart. The second burner holes (242) and the third burner holes (243) are staggered. The gas supply channel is located between two adjacent third burner holes (243) and faces the second burner hole (242).

6. The burner according to claim 1, characterized in that, The flame cap (2) also includes a mounting part (25) connected to the outer ring part (22). The mounting part (25) is used to connect to the base (1). A flame stabilizing ring groove (251) is formed between the top surface of the mounting part (25) and the bottom surface of the outer ring part (22). The flame stabilizing ring groove (251) is connected to the first flame hole (241).

7. The burner according to claim 6, characterized in that, The flame cap (2) is placed on the base (1) to form a gas mixing chamber (253). The mounting part (25) has a through supplementary gas hole (252). One end of the supplementary gas hole (252) is connected to the gas mixing chamber (253), and the other end is connected to the flame stabilizing ring groove (251).

8. The burner according to any one of claims 1-7, characterized in that, The diameter of the first flame hole (241) is D1, and the diameter of the second flame hole (242) is D2, where D1 = 1.2 * D2 ~ 2.3 * D2; and / or, The angle between the outer ring inclined plane (221) and the horizontal plane is 15° to 30°; and / or, The angle between the outer sidewall (232) and the horizontal plane is 30° to 60°; and / or, The angle between the inner sidewall (231) and the horizontal plane is 30° to 60°; and / or, The inner wall (231) and the outer wall (232) are arranged at an angle, and the inner wall (231) and the outer wall (232) gradually approach each other from bottom to top.

9. A gas stove, characterized in that, Including the burner as described in any one of claims 1-8, the gas stove further includes an energy-concentrating plate (10), which is arranged around the outer periphery of the burner, and a secondary air supply channel (100) is formed between the energy-concentrating plate (10) and the burner.

10. The gas stove according to claim 9, characterized in that, The inner peripheral edge of the energy-concentrating disk (10) is not higher than the top of the middle protrusion (23) of the burner.

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