Gas distribution seat, combustor and kitchen range
By setting up a gas mixing tank with a flow-guided structure in the gas separation seat of the stove, the problem of low combustion efficiency caused by unstable gas intake is solved, and full mixing of gas and air and efficient combustion are achieved.
Patent Information
- Application Number
- CN202421943770.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-12
AI Technical Summary
The gas intake of existing stoves is unstable, which makes the gas and air unable to be fully mixed in the gas mixing chamber, resulting in low combustion efficiency.
An air separation seat is designed, including a ventilation hole and a gas mixing tank. The inner wall of the gas mixing tank is provided with a flow guide structure, including a protruding portion and a recessed portion, which is used to guide the gas to collide with the inner wall multiple times, reduce the gas flow rate, and form a spoiler to promote the full mixing of the gas and air.
By reducing the gas flow rate and forming a spoiler, the gas and air are fully mixed in the gas mixing chamber, and the combustion efficiency and thermal efficiency are improved.
Smart Images
Figure CN223036404U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cooking stoves, in particular to a gas distributing base, a burner and a cooking stove. Background Art
[0002] A cooking stove is a device widely used in kitchens. In existing cooking stoves, the gas inlet is unstable. The gas directly entering the mixing chamber from the gas passage has too high a flow rate, resulting in insufficient mixing with air in the mixing chamber, causing gas lift-off and incomplete combustion, leading to low combustion efficiency and affecting the combustion performance of the cooking stove. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a gas distributing base, a burner and a cooking stove, which can reduce the gas flow rate during mixing, enable the gas and air to be fully mixed, and improve the combustion performance.
[0004] To achieve the above object, the utility model adopts the following technical solutions:
[0005] A gas distributing base for a burner, the burner including a burner cap and a gas supply passage. The gas distributing base is provided with ventilation holes and mixing grooves. The ventilation holes are used to communicate with the gas supply passage, and the mixing grooves are used to form a mixing chamber with the burner cap. The inner wall of the mixing groove is provided with a flow guiding structure, and the flow guiding structure includes a convex portion and / or a concave portion.
[0006] As an optional solution of the above gas distributing base, the mixing groove includes an inner ring inner wall and an outer ring inner wall arranged opposite to each other, and the flow guiding structure is arranged on the inner ring inner wall and / or the outer ring inner wall.
[0007] As an optional solution of the above gas distributing base, the flow guiding structure includes a plurality of convex portions and a plurality of concave portions, and the convex portions and the concave portions are alternately arranged along the circumferential direction of the mixing chamber.
[0008] As an optional solution of the above gas distributing base, a plurality of the convex portions are arranged at intervals on one of the inner ring inner wall and the outer ring inner wall, and a plurality of concave portions are arranged at intervals on the other one.
[0009] As an optional solution of the above gas distributing base, the convex portions and the concave portions are arranged opposite to each other or staggeredly.
[0010] As an optional solution of the above gas distributing base, the flow guiding structure includes the convex portion and the concave portion, and the height of the convex portion is greater than, equal to or less than the depth of the concave portion;
[0011] and / or, the cross-sectional area of the convex portion is greater than, equal to or less than the cross-sectional area of the concave portion.
[0012] As an alternative solution to the above-mentioned gas distribution base, at least two mixing grooves are provided, and the at least two mixing grooves are nested. Each mixing groove can form a mixing chamber with the corresponding burner cap, and a flow guiding structure is provided on the inner wall of each mixing groove;
[0013] Alternatively, a central hole is provided on the gas distribution base, the mixing groove is annular and surrounds the outside of the central hole.
[0014] A burner, comprising:
[0015] A burner head, which forms a gas supply channel;
[0016] A gas distribution base, connected to the burner head;
[0017] A burner cap assembly, which includes an inner ring burner cap and an outer ring burner cap. The outer ring burner cap and the gas distribution base form an outer ring mixing chamber, and the inner ring burner cap and the burner head or the gas distribution base form an inner ring mixing chamber. Both the outer ring mixing chamber and the inner ring mixing chamber are communicated with the gas supply channel;
[0018] A flow guiding structure is provided on the inner wall of the inner ring mixing chamber and / or the outer ring mixing chamber. The flow guiding structure includes a convex portion and / or a concave portion.
[0019] As an alternative solution to the above-mentioned burner, the burner head includes an inner ring pipe of the burner head. The gas distribution base is provided with a central hole. The inner ring pipe of the burner head passes through the central hole. The inner ring burner cap covers the top of the inner ring pipe of the burner head, and the inner ring burner cap and the inner ring pipe of the burner head form the inner ring mixing chamber;
[0020] A central column and at least two baffles are arranged in the inner ring pipe of the burner head. One end of the baffle is connected to the central column, and the other end is connected to the inner wall of the inner ring pipe of the burner head.
[0021] A cooker, comprising the above-mentioned gas distribution base or the above-mentioned burner.
[0022] Advantages of the present utility model:
[0023] The gas distribution base provided by the present utility model is provided with a flow guiding structure, which can make the inner wall of the mixing groove uneven, guide the gas to collide with the inner wall multiple times in the mixing groove, play a role in reducing the gas flow rate, and form a turbulent flow, so that the gas can be more fully mixed with air, ensuring more complete combustion and higher thermal efficiency.
[0024] In the burner provided by the present utility model, a flow guiding structure is provided on the inner wall of the mixing chamber, guiding the gas to collide with the inner wall multiple times in the mixing groove, playing a role in reducing the gas flow rate, and forming a turbulent flow, so that the gas can be more fully mixed with air, ensuring more complete combustion and higher thermal efficiency.
[0025] The cooking appliance provided by the present utility model adopts the above-mentioned gas distribution base or burner, and has a good mixing effect of gas and air and a high combustion efficiency. Description of the Drawings
[0026] Figure 1 is an exploded view of the burner provided by the present utility model;
[0027] Figure 2 is a cross-sectional view of the burner provided by the present utility model;
[0028] Figure 3 is Figure 1 a partial enlarged view of part A in
[0029] Figure 4 is Figure 1 a partial enlarged view of part B in
[0030] Figure 5 is Figure 1 a partial enlarged view of part C in
[0031] In the figure:
[0032] 10. Burner head; 11. Burner head body; 111. Outer ring cavity; 112. Inner ring pipe of the burner head; 113. Central column; 114. Baffle; 12. Outer ring ejector pipe; 13. Inner ring ejector pipe; 14. Outer ring nozzle; 15. Inner ring nozzle; 20. Gas distribution base; 21. Bottom plate; 211. Vent hole; 22. Inner side plate; 23. Outer side plate; 30. Flame cover assembly; 31. Outer ring flame cover; 32. Inner ring flame cover; 40. Flow guiding structure; 41. Protruding part; 42. Depressed part. Detailed Embodiments
[0033] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only parts related to the present utility model are shown in the drawings, rather than all structures.
[0034] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0035] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on the top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.
[0036] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0037] This embodiment provides a cooking appliance, including a cooking top panel and a burner. The burner is embedded in the cooking top panel, so that most of the structure of the burner is blocked by the cooking top panel, and the top of the burner extends out of the cooking top panel or is flush with the cooking top panel, so that the flame generated when the burner works is not blocked by the cooking top panel.
[0038] Optionally, mounting holes are provided on the cooking top panel, and the top of the burner extends into the mounting holes.
[0039] As Figure 1 shown, the burner includes a burner head 10, a gas distribution base 20, a burner cap assembly 30 and a lighter. A gas supply passage is formed in the burner head 10 for the introduction of gas; the gas distribution base 20 is connected to the burner head 10; the burner cap assembly 30 includes two burner caps, one of the burner caps is connected to the gas distribution base 20 and encloses a gas mixing chamber, and the other burner cap is connected to the burner head 10 and encloses a gas mixing chamber. The gas mixing chambers are both communicated with the gas supply passage, and gas outlet holes are provided on the burner caps. The lighter is arranged adjacent to the gas outlet holes and can generate sparks to ignite the gas flowing out of the gas outlet holes.
[0040] Specifically, as shown in Figure 1 and Figure 2 shown, the two burner caps are respectively an inner ring burner cap 32 and an outer ring burner cap 31. The outer ring burner cap 31 is connected to the gas distribution base 20, and the enclosed gas mixing chamber is an outer ring gas mixing chamber; the inner ring burner cap 32 is connected to the burner head 10, and the enclosed gas mixing chamber is an inner ring gas mixing chamber, so that the burner has two circles of flames when working, and the cookware is heated more evenly.
[0041] Among them, the burner head 10 includes a burner head main body 11, an injection pipe, and a nozzle. Among them, the injection pipe includes an outer ring injection pipe 12 and an inner ring injection pipe 13, and the nozzle includes an outer ring nozzle 14 and an inner ring nozzle 15. An outer ring cavity 111 and an inner ring cavity are provided in the burner head main body 11. The outer ring cavity 111 is communicated with an outer ring air outlet. The outer ring injection pipe 12 is communicated with the outer ring nozzle 14 and the outer ring cavity 111. The inner ring injection pipe 13 is communicated with the inner ring nozzle 15 and the inner ring cavity. Both the inner ring nozzle 15 and the outer ring nozzle 14 are used for introducing gas and introducing air into the injection pipe, so that the gas and air are mixed and then enter the burner head main body 11, thereby facilitating the ignition of the gas and air mixture at the flame outlet holes.
[0042] When the burner works, the flow rate of the gas entering the mixing chamber is relatively high, resulting in insufficient mixing of the gas and air in the mixing chamber and incomplete combustion, which affects the combustion performance of the cooking appliance.
[0043] To solve the above problems, a flow guiding structure 40 is provided on the inner wall of at least one of the inner ring mixing chamber and the outer ring mixing chamber. The flow guiding structure 40 includes a convex portion 41 and / or a concave portion 42. By providing the flow guiding structure 40, the inner wall of the inner ring mixing chamber and / or the outer ring mixing chamber can be made uneven, guiding the gas to collide with the inner wall multiple times in the mixing chamber, playing a role in reducing the gas flow rate and forming a turbulent flow, so that the gas can be more fully mixed with the air in the mixing chamber, ensuring more complete combustion and higher thermal efficiency.
[0044] In this embodiment, flow guiding structures 40 are provided on the inner walls of both the inner ring mixing chamber and the outer ring mixing chamber, so that the gas in both the outer ring mixing chamber and the inner ring mixing chamber can be fully mixed with the air, thereby improving the combustion efficiency.
[0045] In other embodiments, the flow guiding structure 40 can be provided only on the inner wall of the inner ring mixing chamber or only on the inner wall of the outer ring mixing chamber.
[0046] As Figure 1 shown, the gas distribution base 20 is provided with ventilation holes 211 and mixing grooves. The ventilation holes 211 are communicated with the gas supply channel in the burner head 10, and the mixing grooves are used to cooperate with the burner cap to form a mixing chamber. The flow guiding structure 40 is provided on the inner wall of the mixing groove. The space in the mixing groove is large, and there is enough space to set the flow guiding structure 40; the inner wall area of the mixing groove is large. By setting the flow guiding structure 40, the turbulent flow effect of the flow guiding structure 40 on the gas can be increased, which is beneficial to the full mixing of the gas and air.
[0047] The flow guiding structure 40 includes a convex portion 41 and a concave portion 42. The convex portion 41 protrudes towards the inner side of the gas mixing chamber, and the concave portion 42 is recessed towards the outer side of the gas mixing chamber. By providing the convex portion 41 and the concave portion 42, the unevenness difference of the inner wall of the gas mixing chamber can be increased, so that the gas can change the flow direction multiple times under the guidance of the flow guiding structure 40, increasing the number of collisions between the gas and the gas distribution seat 20, thereby improving the mixing effect of the gas and air.
[0048] In other embodiments, the flow guiding structure 40 may include only the convex portion 41 or only the concave portion 42, which can also make the inner wall of the gas mixing chamber uneven, guide the gas to collide with the gas distribution seat 20, and improve the mixing effect of the gas and air.
[0049] As Figure 1 shown, the gas mixing groove includes an inner ring inner wall and an outer ring inner wall arranged oppositely, and the flow guiding structure 40 is provided on both the inner ring inner wall and the outer ring inner wall to further improve the mixing effect of the gas and air.
[0050] In other embodiments, the flow guiding structure 40 may be provided only on the inner ring inner wall or the outer ring inner wall of the gas mixing groove, which can make the gas and air mix more fully.
[0051] In this embodiment, as Figure 3 and Figure 4 shown, the flow guiding structure 40 includes a plurality of convex portions 41 and a plurality of concave portions 42, and the convex portions 41 and the concave portions 42 are alternately arranged along the circumferential direction of the gas mixing chamber. The distance between the top surface of the convex portion 41 and the bottom surface of the concave portion 42 is large, and the flow disturbance effect on the air flow is large, which is beneficial to the full mixing of the gas and air; by alternately arranging a plurality of convex portions 41 and a plurality of concave portions 42, the number of collisions between the gas and the inner wall of the gas mixing chamber can be increased, which is beneficial to the full mixing of the gas and air and improves the combustion efficiency.
[0052] Optionally, the distance between any adjacent convex portion 41 and concave portion 42 is equal, which is beneficial to improving the mixing effect of the gas and air.
[0053] As Figure 3 shown, in the outer ring inner wall, the cross-sectional area of the convex portion 41 is larger than the cross-sectional area of the concave portion 42. The convex portion 41 has a larger volume and a larger surface area protruding from the inner wall of the gas mixing groove, which can increase the probability of collision between the gas and the convex portion 41 without changing the size of the gas mixing groove, so as to improve the flow disturbance effect on the gas. It should be noted here that the cross-section of the convex portion 41 is a section substantially parallel to the outer ring inner wall, that is to say, the cross-section of the convex portion 41 is substantially perpendicular to the height direction of the convex portion 41; the cross-sectional area of the concave portion 42 is a section substantially parallel to the outer ring inner wall, that is to say, the cross-section of the concave portion 42 is substantially perpendicular to the depth direction of the concave portion 42.
[0054] In other embodiments, the cross-sectional area of the protrusion 41 on the inner wall of the outer ring may be equal to or smaller than the cross-sectional area of the recess 42 .
[0055] In this embodiment, the height of the protrusion 41 is greater than the depth of the recess 42, so as to further increase the surface area of the protrusion 41, thereby increasing the probability of collision with the gas.
[0056] like Figure 4 As shown, in the inner wall of the inner ring, the cross-sectional area of the protrusion 41 is larger than the cross-sectional area of the recessed portion 42. The protrusion 41 has a larger volume and a larger surface area protruding from the inner wall of the gas mixing groove, which can increase the probability of the gas colliding with the protrusion 41 without changing the size of the gas mixing groove, thereby improving the turbulence effect on the gas.
[0057] In this embodiment, the height of the protrusion 41 is greater than the depth of the recess 42, so as to further increase the surface area of the protrusion 41, thereby increasing the probability of collision with the gas.
[0058] In other embodiments, the cross-sectional area of the protrusion 41 on the inner wall of the inner ring may be equal to or smaller than the cross-sectional area of the recess 42 .
[0059] Optionally, the raised portion 41 on the inner wall of the outer ring may face the raised portion 41 on the inner wall of the inner ring, and the recessed portion 42 on the inner wall of the outer ring may face the recessed portion 42 on the inner wall of the inner ring. Alternatively, the raised portion 41 on the inner wall of the outer ring may be staggered with the raised portion 41 on the inner wall of the inner ring to further increase the probability of the flow direction of the gas in the gas mixing tank changing, thereby ensuring sufficient mixing of the gas and air.
[0060] In this embodiment, the size and shape of the raised portion 41 on the inner wall of the outer ring are the same as the size and shape of the raised portion 41 on the inner wall of the inner ring, and the size and shape of the recessed portion 42 on the inner wall of the outer ring are the same as the size and shape of the recessed portion 42 on the inner wall of the inner ring, that is, the guide structures on the inner wall of the inner ring and the inner wall of the outer ring are the same.
[0061] In some embodiments, the flow guiding structure 40 on the inner wall of the outer ring may have a different structure from the flow guiding structure 40 on the inner wall of the inner ring.
[0062] For example, one of the flow guide structures 40 located on the inner wall of the outer ring and the flow guide structure 40 located on the inner wall of the inner ring includes a plurality of protrusions 41, and the other flow guide structure 40 includes a plurality of recesses 42. That is, one of the inner wall of the outer ring and the inner wall of the inner ring is provided with a plurality of protrusions 41 at intervals, and the other is provided with a plurality of recesses 42 at intervals. This arrangement can also increase the turbulence effect and improve the mixing of gas and air. Furthermore, the protrusions 41 and the recesses 42 can be arranged relative to each other, or staggered.
[0063] Exemplarily, among the inner walls of the outer ring and the inner ring, the flow guiding structure 40 on one of them includes a convex portion 41 and a concave portion 42, and the other flow guiding structure 40 only includes the convex portion 41 or the concave portion 42.
[0064] Exemplarily, the flow guiding structures 40 on the inner walls of the outer ring and the inner ring both include a concave portion 42 and a convex portion 41, and the shape and / or size of the convex portion 41 on the inner wall of the outer ring is different from the shape and / or size of the convex portion 41 on the inner wall of the inner ring, and / or the shape and / or size of the concave portion 42 on the inner wall of the outer ring is different from the shape and / or size of the concave portion 42 on the inner wall of the inner ring.
[0065] For example, the flow guiding structures 40 on the inner walls of the inner ring and the outer ring include a concave portion 42 and a convex portion 41, the shapes of the convex portions 41 are the same, and the shapes of the concave portions 42 are the same. Among them, the cross-sectional area of the convex portion 41 on the inner wall of the inner ring may be larger or smaller than the cross-sectional area of the convex portion 41 on the inner wall of the outer ring, and the cross-sectional area of the concave portion 42 on the inner wall of the inner ring may be larger or smaller than the cross-sectional area of the concave portion 42 on the inner wall of the outer ring.
[0066] In this embodiment, the number of the gas mixing grooves on the gas distributing seat 20 is one. A central hole is provided on the gas distributing seat 20. The gas mixing groove is annular and is disposed outside the central hole. The outer ring burner cap 31 is connected to the gas distributing seat 20 and encloses an outer ring gas mixing chamber with the gas mixing groove; the inner ring burner cap 32 is connected to the burner head 10 and encloses an inner ring gas mixing chamber with the burner head 10.
[0067] Combined with Figure 1 、 Figure 3 and Figure 4 As shown, the gas distributing seat 20 includes a bottom plate 21, an outer side plate 23 and an inner side plate 22. A central hole is provided on the bottom plate 21 for avoiding the inner ring burner cap 32; the outer side plate 23 is annular, the outer side plate 23 is connected to the outer edge of the bottom plate 21 and surrounds the circumference of the bottom plate 21 for one week; the inner side plate 22 is annular, the inner side plate 22 is connected to the inner edge of the bottom plate 21 and surrounds the circumference of the bottom plate 21 for one week. A gas mixing groove is formed among the inner side plate 22, the outer side plate 23 and the bottom plate 21.
[0068] Combined with Figure 1 and Figure 5 As shown, the burner head main body 11 includes a burner head inner ring pipe 112. The burner head inner ring pipe 112 passes through the central hole. The inner ring burner cap 32 is covered on the top of the burner head inner ring pipe 112. The inner ring burner cap 32 and the burner head inner ring pipe 112 enclose an inner ring gas mixing chamber. By enclosing an inner ring gas mixing chamber through the cooperation of the inner ring burner cap 32 and the burner head 10, the structure of the gas distributing seat 20 can be simplified, the processing can be simplified, and the cost can be reduced.
[0069] In order to enable the gas to flow out evenly through the gas outlet holes on the inner-ring burner cap 32, a central column 113 and at least two baffles 114 are arranged in the inner-ring pipe 112 of the burner head. One end of the baffle 114 is connected to the central column 113, and the other end is connected to the inner wall of the inner-ring pipe 112 of the burner head. By arranging the central column 113 and at least two baffles 114, the inner-ring gas mixing chamber can be divided into at least two chambers, so as to achieve the purpose of gas shunt, improve the uniformity of gas distribution, and thus ensure uniform gas outlet and combustion efficiency.
[0070] In this embodiment, four baffles 114 are arranged, so that the inner-ring gas mixing chamber is divided into four small cavities, and each small cavity is communicated with the inner-ring cavity, so that the gas in the inner-ring ejector pipe 13 can be shunted into each small cavity.
[0071] In this embodiment, flow guiding structures 40 are arranged on both the central column 113 and the inner wall of the inner-ring pipe 112 of the burner head to improve the mixing effect of the gas and air in the inner-ring gas mixing chamber.
[0072] In some embodiments, at least two gas mixing grooves are formed on the gas distribution base 20. The at least two gas mixing grooves are nested, and each gas mixing groove can form a gas mixing chamber with the corresponding burner cap. Flow guiding structures 40 are arranged on the inner walls of each gas mixing groove.
[0073] Exemplarily, two gas mixing grooves are formed on the gas distribution base 20, and the two gas mixing grooves cooperate with the inner-ring burner cap 32 and the outer-ring burner cap 31 respectively to form gas mixing chambers.
[0074] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the present invention, and are not limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.
Claims
1. A gas distributor, used for a burner, the burner comprising a fire cover and a gas supply channel, characterized in that: The gas distribution seat is provided with a vent hole (211) and a gas mixing groove, the vent hole (211) is used to connect the gas supply channel, the gas mixing groove is used to form a gas mixing chamber with the fire cover, and the inner wall of the gas mixing groove is provided with a flow guiding structure (40), and the flow guiding structure (40) includes a protruding portion (41) and / or a recessed portion (42).
2. The gas distributor according to claim 1, characterized in that: The gas mixing groove comprises an inner ring inner wall and an outer ring inner wall which are arranged opposite to each other, and the flow guiding structure (40) is arranged on the inner ring inner wall and / or the outer ring inner wall.
3. The gas distributor according to claim 2, characterized in that: The flow-guiding structure (40) comprises a plurality of raised portions (41) and a plurality of recessed portions (42), wherein the raised portions (41) and the recessed portions (42) are alternately arranged along the circumference of the gas mixing chamber.
4. The gas distributor according to claim 2, characterized in that: A plurality of protrusions (41) are arranged at intervals on one of the inner wall of the inner ring and the inner wall of the outer ring, and a plurality of recesses (42) are arranged at intervals on the other of the inner wall of the inner ring.
5. The gas distributor according to claim 4, characterized in that: The raised portion (41) and the recessed portion (42) are arranged relative to each other or staggered.
6. The gas distributor according to any one of claims 1 to 5, characterized in that: The flow-guiding structure (40) comprises the protruding portion (41) and the recessed portion (42), and the height of the protruding portion (41) is greater than, equal to, or less than the depth of the recessed portion (42); And / or, the cross-sectional area of the protruding portion (41) is greater than, equal to, or smaller than the cross-sectional area of the recessed portion (42).
7. The gas distributor according to any one of claims 1 to 5, characterized in that: The number of the gas mixing grooves is at least two, and the at least two gas mixing grooves are nested, each gas mixing groove can be surrounded by the corresponding fire cover to form the gas mixing chamber, and the inner wall of each gas mixing groove is provided with the guide structure (40); Alternatively, a central hole is provided on the gas separation seat, and the gas mixing groove is annular and arranged around the outer side of the central hole.
8. A burner, characterized in that: include: A furnace head (10), wherein the furnace head (10) is formed with a gas supply channel; A gas distributor seat connected to the furnace head (10); A fire cover assembly (30), the fire cover assembly (30) comprising an inner ring fire cover (32) and an outer ring fire cover (31), the outer ring fire cover (31) and the gas separation seat forming an outer ring gas mixing chamber, the inner ring fire cover (32) and the burner head (10) or the gas separation seat forming an inner ring gas mixing chamber, the outer ring gas mixing chamber and the inner ring gas mixing chamber both being in communication with the gas supply channel; The inner wall of the inner ring gas mixing chamber and / or the outer ring gas mixing chamber is provided with a flow guiding structure (40), and the flow guiding structure (40) comprises a protruding portion (41) and / or a recessed portion (42).
9. The burner according to claim 8, characterized in that The burner head (10) comprises a burner head inner ring tube (112), the gas distribution seat is provided with a central hole, the burner head inner ring tube (112) is inserted into the central hole, the inner ring fire cover (32) is covered on the top of the burner head inner ring tube (112), and the inner ring fire cover (32) and the burner head inner ring tube (112) enclose the inner ring gas mixing chamber; A central column (113) and at least two baffles (114) are arranged inside the furnace head inner ring tube (112); one end of the baffle (114) is connected to the central column (113), and the other end is connected to the inner wall of the furnace head inner ring tube (112).
10. A cooking appliance, characterized in that: It comprises the gas distributor according to any one of claims 1 to 7 or the burner according to any one of claims 8 to 9.