Combustor and gas stove

Abstract

The application relates to the technical field of cooking utensils, in particular to a burner and a gas stove. The burner comprises a burner head and an outer ring fire cover installed on the burner head; a first annular wall and a second annular wall are arranged on the burner head, and an annular air groove is defined between the first annular wall and the second annular wall and communicates with the inside of the outer ring fire cover; the top end of the first annular wall extends into the outer ring fire cover; a plurality of first grooves are arranged on the top of the first annular wall and spaced apart along the circumference of the first annular wall, and a tooth part is defined between two adjacent first grooves; the plurality of first grooves one-to-one correspond to a plurality of fire holes on the outer ring fire cover and communicate with the plurality of fire holes; wherein a communication part is arranged on each tooth part, and the first grooves on the two sides of the tooth part communicate through the communication part. The communication part on each tooth part can balance the airflow pressure in the burner, the pressure of the gas sprayed at the positions of the plurality of fire holes of the outer ring fire cover is balanced, the outer ring flame burns stably, and the flame stabilizing effect is achieved.

Description

Technical Field

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

[0002] With increasing awareness of environmental protection and cost, copper burner caps are gradually being replaced by stainless steel burner caps. Stainless steel burner caps are generally made through a stretching process. Due to the thickness limitations of stainless steel, it cannot provide a stable gas flow path for combustion, resulting in unstable flue gas and poor combustion conditions.

[0003] Currently, the burner includes a burner head and an inner ring flame cap and an outer ring flame cap respectively installed on the burner head. The top of the outer wall of the burner head extends into the outer ring flame cap. Multiple grooves are provided at the top of the outer wall of the burner head. Multiple flame holes are provided on the outer wall of the outer ring flame cap. The positions of the multiple flame holes correspond one-to-one with the multiple grooves. The grooves extend the depth of the flame holes to provide a stable gas passage.

[0004] However, during combustion, the flame at some of the burner holes on the outer ring burner cap is unstable. Utility Model Content

[0005] Based on this, this application provides a burner and a gas stove to solve the problem of unstable flame at some of the flame holes on the outer ring burner during combustion in related technologies.

[0006] In a first aspect, embodiments of this application provide a burner, including a burner head and an outer ring flame cap mounted on the burner head;

[0007] The burner head is provided with a first annular wall and a second annular wall. The first annular wall is arranged around the outside of the second annular wall and spaced apart from the second annular wall. An annular gas groove is defined between the first annular wall and the second annular wall. The annular gas groove communicates with the interior of the outer annular burner cap. The top of the first annular wall extends into the outer annular burner cap. Multiple first grooves are arranged around the top of the first annular wall in a circumferential manner. Teeth are defined between two adjacent first grooves. The multiple first grooves are connected to multiple fire holes on the outer annular burner cap one by one.

[0008] Each tooth has a connecting part, and the first grooves on both sides of the tooth are connected through the connecting part.

[0009] In one possible implementation, the connecting part is a second groove provided at the top of the tooth, and the two sides of the second groove are respectively connected to the first grooves on both sides of the tooth.

[0010] In one possible implementation, along the thickness direction of the first annular wall, the second groove has a first sidewall and a second sidewall disposed opposite to each other, the first sidewall and the second sidewall being parallel to each other.

[0011] In one possible implementation, the distance between the first sidewall and the second sidewall is less than or equal to 5 mm, and / or;

[0012] The depth of the second groove is less than or equal to 2 mm.

[0013] In one possible implementation, the two ends of the second groove on any tooth are respectively aligned with the ends of the second grooves on the adjacent teeth on both sides.

[0014] In one possible implementation, the second groove extends circumferentially along the first annular wall, and a plurality of second grooves are arranged in a ring array around the axis of the first annular wall.

[0015] In one possible implementation, the second groove is spaced apart from the outer wall of the first annular wall along the thickness direction of the first annular wall.

[0016] In one possible implementation, the multiple first grooves include multiple main flame grooves and multiple stabilizing flame grooves, which are arranged alternately, and the depth of the main flame grooves is greater than the depth of the stabilizing flame grooves.

[0017] The outer ring flame cap has multiple flame holes, including multiple main flame holes and multiple flame stabilizing holes. The multiple main flame holes are connected to the multiple main flame grooves one by one, and the multiple flame stabilizing holes are connected to the multiple flame stabilizing grooves one by one.

[0018] The depth of the second groove is less than the depth of the stabilizing groove.

[0019] In one possible implementation, the connecting part is a connecting hole formed on the tooth, with both ends of the connecting hole connected to the first grooves on both sides of the tooth.

[0020] Secondly, embodiments of this application provide a gas stove, including the burner described above.

[0021] The burner and gas stove provided in this application include a burner head and an outer ring flame cap mounted on the burner head. The burner head has a first annular wall and a second annular wall. The first annular wall surrounds the outer side of the second annular wall and defines an annular gas groove between them. Multiple first grooves on the first annular wall correspond one-to-one with multiple flame holes on the outer ring flame cap, allowing gas to be ejected through the first grooves and corresponding flame holes, thereby forming a flame at the multiple flame holes of the outer ring flame cap. Each tooth has a connecting portion, and the first grooves on both sides of the tooth are connected through the connecting portion. The connecting portions on each tooth can balance the internal airflow pressure of the burner, achieving pressure balance between adjacent flame holes and the multiple flame holes of the outer ring flame cap, thus stabilizing the outer ring flame and achieving a flame stabilization effect. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the burner provided in an embodiment of this application;

[0024] Figure 2 for Figure 1 Exploded view of the burner shown;

[0025] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle;

[0026] Figure 4 for Figure 2 A magnified view of a portion of point B in the middle;

[0027] Figure 5 for Figure 2 A magnified view of a portion of point C in the middle;

[0028] Figure 6 A cross-sectional view of a burner provided in an embodiment of this application;

[0029] Figure 7 for Figure 6 A magnified view of a portion of point D.

[0030] Explanation of reference numerals in the attached figures:

[0031] 100 - Furnace head; 110 - First annular wall; 111 - First groove; 1111 - Main fire groove; 1112 - Stabilizing groove; 112 - Tooth; 113 - Second groove; 1131 - First side wall; 1132 - Second side wall; 120 - Second annular wall; 130 - Annular gas groove;

[0032] 200 - Outer ring flame cap; 210 - Flame hole; 211 - Main flame hole; 212 - Flame stabilizer hole;

[0033] 300-Inner ring flame cap. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing this application and 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, and therefore should not be construed as a limitation of this application.

[0037] The terms “first,” “second,” and “third” (if any) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0038] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or display that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or display.

[0039] In existing technology, a burner includes a burner head and inner and outer ring flame caps respectively installed on the burner head. The top of the outer wall of the burner head extends into the outer ring flame cap, and multiple grooves are provided at the top of the outer wall of the burner head. Multiple flame holes are provided on the outer wall of the outer ring flame cap, with the positions of the flame holes corresponding one-to-one with the grooves. The grooves extend the depth of the flame holes to provide a stable gas passage. An annular wall is provided inside the outer wall of the burner head, defining an exhaust groove between the outer wall and the annular wall. This exhaust groove communicates with the gas passage of the burner head. However, during combustion, the gas pressure is high at the flame holes of the outer ring flame cap near the gas passage of the burner head, and low at the flame holes of the outer ring flame cap further away from the burner head. Some flame holes of the outer ring flame cap may experience flameout due to excessive gas pressure, while some flame holes may experience backfire due to insufficient gas pressure, meaning the flame at some flame holes of the outer ring flame cap is unstable.

[0040] After repeated consideration and verification, the inventors discovered that each pair of adjacent grooves defines a toothed section at the top of the outer wall of the burner head. If a connecting part is provided on the toothed section to connect the grooves on both sides of the tooth, the connecting part on each toothed section can gradually make the gas pressure in the grooves on both sides of the toothed section uniform. By providing a connecting part on each toothed section, the gas pressure in each groove at the top of the outer wall of the burner head is balanced, preventing the gas pressure ejected from some of the flame holes of the outer ring burner cap from being too high or too low, thereby stabilizing the flame at the flame hole positions on the periphery of the outer ring burner cap.

[0041] In view of this, the inventors designed a burner and a gas stove. The burner head is provided with a first annular wall and a second annular wall. The first annular wall is located outside the second annular wall and defines an annular gas groove between them. The top of the first annular wall is provided with multiple first grooves, each of which communicates with a flame hole on an outer ring burner cap. A tooth is defined between every two adjacent first grooves. By providing connecting parts on the teeth, the first grooves on both sides of the teeth are connected. The connecting parts on each tooth balance the gas pressure in the multiple first grooves, preventing excessively high or low gas pressure flowing out of some flame holes and stabilizing the flame at the flame hole positions on the periphery of the outer ring burner cap.

[0042] The technical solutions of the burner and gas stove provided in the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0043] Reference Figures 1 to 7 As shown, the burner provided in this embodiment includes a burner head 100 and an outer ring flame cap 200 mounted on the burner head 100.

[0044] The burner head 100 is provided with a first annular wall 110 and a second annular wall 120. The first annular wall 110 is arranged around the outside of the second annular wall 120 and spaced apart from the second annular wall 120. An annular gas groove 130 is defined between the first annular wall 110 and the second annular wall 120. The first annular wall 110, the second annular wall 120, and the annular gas groove 130 are all arranged around the axis of the outer ring burner cover 200. The burner head 100 is provided with a gas passage that communicates with the annular gas groove 130, allowing gas to enter the annular gas groove 130 via the gas passage. In this embodiment, the specific size of the interval between the first annular wall 110 and the second annular wall 120 is not limited; those skilled in the art can set it as needed.

[0045] The annular gas groove 130 communicates with the interior of the outer annular flame cap 200, and the top end of the first annular wall 110 extends into the outer annular flame cap 200. Schematic, the outer annular flame cap 200 is provided with an annular outer annular cavity, and the annular gas groove 130 communicates with the outer annular cavity. The top end of the first annular wall 110 extends into the outer annular cavity and can abut against the side wall of the outer annular flame cap 200.

[0046] The top of the first annular wall 110 is provided with a plurality of first grooves 111 spaced around its circumference. Teeth 112 are defined between adjacent first grooves 111. Each of the first grooves 111 corresponds to and communicates with a plurality of flame holes 210 on the outer annular burner cap 200. Each first groove 111 extends downwards from the top of the first annular wall 110. When the outer annular burner cap 200 is assembled with the burner head 100, the top wall of the outer annular burner cap 200 can close the opening at the top of the first groove 111. The flame holes 210 of the outer annular burner cap 200 are located on its sidewalls. Each first groove 111 is directly opposite a flame hole 210. The cross-sectional shape and size of each first groove 111 match its corresponding flame hole 210. Gas in the annular gas groove 130 can be ejected through the first groove 111 and the corresponding flame hole 210. For example, each first groove 111 can be integrally formed on the top of the first annular wall 110.

[0047] Indicatively, the outer ring burner cap 200 can be made of stainless steel. Compared to copper, stainless steel is simpler to process and easier to form, and the flame holes 210 can be integrally formed without secondary processing. Specifically, the outer ring burner cap 200 can be formed from stainless steel through stretching. The outer ring burner cap 200 has a thicker wall, and the flame holes 210 are shallower. The multiple first grooves 111 on the burner head 100 can extend the depth of the flame holes 210, providing a stable gas passage, ensuring stable flue gas and combustion conditions. A positioning structure can be provided between the outer ring burner cap 200 and the burner head 100 to ensure that the multiple flame holes 210 on the outer ring burner cap 200 are aligned with the multiple first grooves 111 on the burner head 100.

[0048] Each tooth 112 is provided with a connecting portion, and the first grooves 111 on both sides of the tooth 112 are connected through the connecting portion. Schematic, the connecting portion extends through the tooth 112, and after connecting the first grooves 111 on both sides of the tooth 112, the two sides of the tooth 112 in the first grooves 111 on both sides of the tooth 112 are balanced. Because each tooth 112 is provided with a connecting portion, the gas pressure in all the first grooves 111 at the top of the first annular wall 110 is balanced.

[0049] like Figure 1 and Figure 2 As shown, the burner also includes an inner ring flame cap 300, which is connected to the burner head 100, and an outer ring flame cap 200 arranged around the outside of the inner ring flame cap 300. During combustion, flames are generated at both the inner ring flame cap 300 and the outer ring flame cap 200.

[0050] The burner provided in this embodiment has a first annular wall 110 and a second annular wall 120 on its burner head 100. The first annular wall 110 is arranged around the outside of the second annular wall 120 and defines an annular gas groove 130 between the two walls. Multiple first grooves 111 on the first annular wall 110 are connected one-to-one with multiple flame holes 210 on the outer annular burner cap 200. Gas can be ejected through the first grooves 111 and the corresponding flame holes 210, thereby forming flames at the multiple flame holes 210 of the outer annular burner cap 200. Each tooth 112 has a connecting portion, and the first grooves 111 on both sides of the tooth 112 are connected through the connecting portion. The connecting portions on each tooth 112 can balance the internal airflow pressure of the burner, achieving pressure balance between adjacent flame holes 210 and the multiple flame holes 210 of the outer annular burner cap 200, thus stabilizing the outer annular flame and achieving a flame stabilization effect.

[0051] In one embodiment, such as Figures 2-4 , Figure 6 and Figure 7 As shown, the connecting part is a second groove 113 provided at the top of the tooth 112, and the two sides of the second groove 113 are respectively connected to the first groove 111 on both sides of the tooth 112.

[0052] In this design, the opening of the second groove 113 faces upwards. After the outer ring flame cap 200 is assembled with the burner head 100, the top wall of the outer ring flame cap 200 closes the opening of the second groove 113. The two ends of the second groove 113 in its extending direction are respectively connected to the first grooves 111 on both sides of the toothed portion 112. The second groove 113 can be integrally formed or cut and set at the top of the toothed portion 112; no single limitation is made here. Optionally, the first grooves 111 and the second grooves 113 can be integrally formed on the first annular wall 110, reducing the processing steps of the burner head 100 and ensuring consistency.

[0053] In this embodiment, the second groove 113 is used as the connecting part, which facilitates the processing of the connecting part. The air pressure in each first groove 111 is balanced by the second groove 113 on each tooth 112, so that the flame at each flame hole 210 position of the outer ring flame cap 200 burns stably.

[0054] In a specific embodiment, such as Figures 2-4 As shown, along the thickness direction of the first annular wall 110, the second groove 113 has a first sidewall 1131 and a second sidewall 1132 that are arranged opposite to each other, with the first sidewall 1131 and the second sidewall 1132 arranged parallel to each other.

[0055] The bottom wall of the second groove 113 is connected at both ends to the first side wall 1131 and the second side wall 1132, respectively. Schematic, both the first side wall 1131 and the second side wall 1132 extend vertically. Here, the thickness direction of the first annular wall 110 is defined as the width direction of the second groove 113. The two side walls of the second groove 113 are arranged parallel to each other in the width direction.

[0056] The above-mentioned design ensures the cross-sectional area of ​​the second groove 113, thereby guaranteeing the flow rate within it. This also improves the gas pressure balance in the first grooves 111 on both sides of the tooth 112, further stabilizing the flame at each of the flame holes 210 of the outer ring burner cap 200. Furthermore, the second groove 113 is easy to manufacture, which helps reduce the production cost of the burner.

[0057] In other embodiments, the first sidewall 1131 and the second sidewall 1132 of the second groove 113 may be inclined to each other, the distance between the first sidewall 1131 and the second sidewall 1132 gradually decreases from top to bottom, and the cross-sectional shape of the second groove 113 may be approximately "V" shaped. In another embodiment, the cross-sectional shape of the second groove 113 may also be semi-circular or semi-elliptical.

[0058] In one possible implementation, the distance between the first sidewall 1131 and the second sidewall 1132 is less than or equal to 5 mm, meaning the width of the second groove 113 does not exceed 5 mm. For example, the width of the second groove 113 can be 3 mm, 4 mm, or 5 mm, etc., and is not limited to a single value. When the width of the second groove 113 exceeds 5 mm, the flow rate of the second groove 113 is too large. In this case, the second groove 113 will cause the gas flow rate in the first grooves 111 on both sides to decrease, affecting the stability of the flame at the position of the flame hole 210.

[0059] In one possible implementation, the depth of the second groove 113 is less than or equal to 2 mm. For example, the depth of the second groove 113 can be 1 mm, 1.5 mm, or 2 mm, etc., and is not limited to a single depth. When the depth of the second groove 113 is greater than 2 mm, the flow rate in the second groove 113 is too large. In this case, the second groove 113 will cause the gas flow rate in the first grooves 111 on both sides to decrease, affecting the stability of the flame at the position of the flame hole 210.

[0060] In other words, the above arrangement can prevent the flow rate of the second groove 113 from being too large, ensure the flow rate of the gas in the first groove 111 on both sides of the second groove 113, and ensure the stability of the flame at the position of the fire hole 210.

[0061] In a specific embodiment, such as Figures 2-4 As shown, the two ends of the second groove 113 on any tooth 112 are respectively aligned with the ends of the second groove 113 on the adjacent teeth 112 on both sides.

[0062] The cross-sectional shape and size of the end of the second groove 113 match the end of the adjacent second groove 113. During combustion, the gas can flow more easily between the multiple pairs of second grooves 113, and the gas pressure in the multiple first grooves 111 at the top of the first annular wall 110 can be more easily balanced, further ensuring stable combustion of the flame at each flame hole 210 position of the outer ring burner cap 200.

[0063] In other embodiments, the second grooves 113 on different teeth 112 may also be arranged in a staggered manner.

[0064] In a more specific embodiment, such as Figures 2-4 As shown, the second groove 113 extends circumferentially along the first annular wall 110, and a plurality of second grooves 113 are arranged in a ring array around the axis of the first annular wall 110.

[0065] Schematic, the multiple second grooves 113 on the first annular wall 110 form similar annular grooves. When the outer ring burner cap 200 is assembled with the burner head 100, the multiple second grooves 113 and the top wall of the outer ring burner cap 200 define similar annular cavities. This arrangement facilitates the machining of the second grooves 113 on the multiple teeth 112, and also shortens the gas flow path in the second grooves 113. The gas in the multiple first grooves 111 can flow more easily through the multiple second grooves 113, and the gas pressure in the multiple first grooves 111 can be more easily balanced, further ensuring stable combustion of the flame at each burner hole 210 position of the outer ring burner cap 200.

[0066] like Figures 2-4 and Figure 7 As shown, along the thickness direction of the first annular wall 110, there is a gap between the second groove 113 and the outer wall of the first annular wall 110.

[0067] For example, in the thickness direction of the first annular wall 110, the second groove 113 can be located in the middle of the first annular wall 110, with a gap between the side of the first annular wall 110 facing the side wall of the outer annular flame cap 200 and the second groove 113. This gap can prevent the second groove 113 from affecting the gas flow rate and flow direction at the gas outlet position of the first groove 111, thereby ensuring stable combustion of the flame at each flame hole 210 position of the outer annular flame cap 200. In this embodiment, the specific size of the gap between the second groove 113 and the outer side wall of the first annular wall 110 is not limited, and those skilled in the art can set it as needed.

[0068] like Figures 2-4 As shown, the plurality of first grooves 111 include a plurality of main flame grooves 1111 and a plurality of flame stabilizing grooves 1112, which are arranged alternately. The depth of the main flame grooves 1111 is greater than the depth of the flame stabilizing grooves 1112. It is understood that during combustion, the gas in the annular gas groove 130 flows to the side wall of the outer annular burner cap 200 through the plurality of main flame grooves 1111 and the plurality of flame stabilizing grooves 1112, and the gas flow rate in the main flame grooves 1111 is greater than the gas flow rate in the flame stabilizing grooves 1112. The main flame grooves 1111 and the flame stabilizing grooves 1112 can be integrally formed on the top of the first annular wall 110. Those skilled in the art can set the depth of the main flame grooves 1111 and the flame stabilizing grooves 1112 as needed; no single depth is specified here.

[0069] The outer ring flame cap 200 has multiple flame holes 210, including multiple main flame holes 211 and multiple flame stabilizing holes 212. Each main flame hole 211 corresponds to and is connected to a main flame groove 1111, and each flame stabilizing hole 212 corresponds to and is connected to a flame stabilizing groove 1112. Schematic, the height of the main flame hole 211 is greater than the height of the flame stabilizing hole 212. The cross-sectional shape and size of the main flame groove 1111 match the main flame hole 211, and the cross-sectional shape and size of the flame stabilizing groove 1112 match the flame stabilizing hole 212.

[0070] Those skilled in the art will understand that during combustion, flames will be generated at both the main flame port 211 and the flame stabilizing port 212 of the outer ring burner cap 200, and the flame at the flame stabilizing port 212 will be smaller than the flame at the main flame port 211. This arrangement prevents flame detachment or backfire on the outer ring burner cap 200 due to airflow disturbance.

[0071] The depth of the second groove 113 is less than the depth of the flame stabilizing groove 1112. The above arrangement can prevent the flow rate of the second groove 113 from being too large and affecting the gas flow rate in the main flame groove 1111 and the flame stabilizing groove 1112, so that the flame at the main flame hole 211 and the flame stabilizing hole 212 of the outer ring flame cap 200 can burn stably.

[0072] In another possible implementation, the connecting part is a connecting hole formed on the tooth 112, and the two ends of the connecting hole are respectively connected to the first groove 111 on both sides of the tooth 112.

[0073] The connecting holes are provided through the corresponding teeth 112, and the gas in the first grooves 111 on both sides of the teeth 112 can be connected through the connecting holes. The connecting holes on each tooth 112 can balance the airflow pressure inside the burner, so that the adjacent flame holes 210 reach pressure balance. The pressure of the gas ejected from the multiple flame holes 210 of the outer ring burner cap 200 is balanced, so that the outer ring flame burns stably and achieves a flame stabilization effect.

[0074] This application also provides a gas stove, including the burner described above.

[0075] The gas stove provided in this application, due to the use of the aforementioned burner, allows for stable combustion of the flame at each of the flame holes 210 on the outer ring burner cap 200, enabling the gas stove to reliably heat cookware and improve the user experience.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A burner, characterized in that, Includes a burner head and an outer ring flame cap installed on the burner head; The burner head is provided with a first annular wall and a second annular wall. The first annular wall is arranged around the outside of the second annular wall and spaced apart from the second annular wall. An annular gas groove is defined between the first annular wall and the second annular wall. The annular gas groove communicates with the interior of the outer annular burner cover. The top of the first annular wall extends into the outer annular burner cover. The top of the first annular wall is provided with a plurality of first grooves spaced around the circumference of the first annular wall. A tooth is defined between two adjacent first grooves. The plurality of first grooves are connected to a plurality of fire holes on the outer annular burner cover. Each of the teeth is provided with a connecting portion, and the first grooves on both sides of the teeth are connected through the connecting portion.

2. The burner according to claim 1, characterized in that, The connecting portion is a second groove provided at the top of the tooth, and the two sides of the second groove are respectively connected to the first grooves on both sides of the tooth.

3. The burner according to claim 2, characterized in that, Along the thickness direction of the first annular wall, the second groove has a first sidewall and a second sidewall disposed opposite to each other, the first sidewall and the second sidewall being parallel to each other.

4. The burner according to claim 3, characterized in that, The distance between the first sidewall and the second sidewall is less than or equal to 5 mm, and / or; The depth of the second groove is less than or equal to 2 mm.

5. The burner according to claim 2, characterized in that, The two ends of the second groove on any of the teeth are respectively aligned with the ends of the second groove on the adjacent teeth on both sides.

6. The burner according to claim 5, characterized in that, The second groove extends circumferentially along the first annular wall, and a plurality of the second grooves are arranged in a ring array around the axis of the first annular wall.

7. The burner according to claim 5, characterized in that, Along the thickness direction of the first annular wall, there is a gap between the second groove and the outer wall of the first annular wall.

8. The burner according to claim 2, characterized in that, The plurality of first grooves include a plurality of main flame grooves and a plurality of flame stabilizing grooves, the plurality of main flame grooves and the plurality of flame stabilizing grooves are arranged alternately, and the depth of the main flame grooves is greater than the depth of the flame stabilizing grooves; The multiple flame holes on the outer ring flame cap include multiple main flame holes and multiple flame stabilizing holes. The multiple main flame holes are connected to the multiple main flame grooves one by one, and the multiple flame stabilizing holes are connected to the multiple flame stabilizing grooves one by one. The depth of the second groove is less than the depth of the fire-stabilizing groove.

9. The burner according to claim 1, characterized in that, The connecting portion is a connecting hole formed on the tooth, and the two ends of the connecting hole are respectively connected to the first groove on both sides of the tooth.

10. A gas stove, characterized in that, The burner includes any one of claims 1-9.

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