Burner cap, burner and cooking appliance

Abstract

The present invention discloses a burner cap, a burner and a cooking stove. The burner cap has: an air passage hole; a first annular combustion chamber disposed outside the air passage hole; a second annular combustion chamber disposed outside the first annular combustion chamber; and diversion fire holes, the diversion fire holes communicating the air passage hole and the second annular combustion chamber; or, an air inlet of the diversion fire holes communicating with the first annular combustion chamber, and an air outlet of the diversion fire holes being disposed on an outer circumferential wall or a top circumferential wall of the second annular combustion chamber; the diversion fire holes are annularly distributed in a plurality in the circumferential direction of the burner cap. Thus, it is beneficial to improve the power and efficiency of the entire burner.

Description

Technical Field

[0001] The present invention relates to the technical field of gas cookers, and particularly to a burner cap, a burner and a cooker. Background Art

[0002] Traditional upward air intake burners usually include components such as a bottom cup, a gas distribution plate and a burner cap assembly. Among them, the gas distribution plate is arranged between the bottom cup and the burner cap assembly to mix the mixed gas flow flowing towards the burner cap assembly.

[0003] Among them, the burner cap assembly usually includes a plurality of burner caps, such as an inner ring burner cap and an outer ring burner cap, etc. Each burner cap has an annular combustion cavity and a fire hole communicating with the annular combustion cavity. Specifically, the annular combustion cavities of each burner cap are relatively independent and are controlled through relatively independent gas paths; in this way, when the intake power of the ejector tube corresponding to the outer ring burner cap is too large, there will be too much mixed gas flow in the annular combustion cavity of the outer ring burner cap, resulting in an over-large outer ring fire of the burner, which is not conducive to the improvement of the power and efficiency of the entire burner. Summary of the Invention

[0004] The main object of the present invention is to propose a burner cap, aiming to solve the technical problem of how to improve the power and efficiency of the entire burner.

[0005] To achieve the above object, the present invention proposes a burner cap for a burner. The burner cap has:

[0006] An air passing through hole;

[0007] A first annular combustion cavity arranged outside the air passing through hole;

[0008] A second annular combustion cavity arranged outside the first annular gas cavity; and

[0009] A flow dividing fire hole, the flow dividing fire hole communicating the air passing through hole and the second annular combustion cavity; or, an air inlet of the flow dividing fire hole communicating with the first annular combustion cavity, and an air outlet of the flow dividing fire hole arranged on an outer ring wall or a top ring wall of the second annular combustion cavity; the flow dividing fire holes are annularly distributed in a plurality along the circumference of the burner cap.

[0010] Optionally, the flow dividing fire holes are inclined.

[0011] Optionally, the burner cap includes an annular top plate, a first annular side plate arranged on an inner peripheral edge of the annular top plate, an annular convex plate protruding from a lower surface of the annular top plate, and a second annular side plate arranged on an outer peripheral edge of the annular top plate. A first annular combustion cavity is formed between the first annular side plate and the annular convex plate, and a second annular combustion cavity is formed between the second annular side plate and the annular convex plate;

[0012] The air inlet of the shunt flame holes is provided on the outer ring surface of the annular convex plate, and the air outlet of the shunt flame holes is provided on the inner ring surface of the first annular side plate.

[0013] Optionally, the first annular side plate is inclined inwardly and downwardly, and / or the second annular side plate is inclined outwardly and downwardly.

[0014] Optionally, the burner cap further includes a first connecting ring convex provided at the lower peripheral edge of the first annular side plate and extending downward, and the first connecting ring convex is used for sealingly mating and connecting with the inner ring wall of the first annular air cavity of the bottom cup; and / or,

[0015] The burner cap further includes a second connecting ring convex provided at the lower peripheral edge of the second annular side plate and extending downward, and the second connecting ring convex is used for sealingly mating and connecting with the outer ring wall of the second annular air cavity of the bottom cup.

[0016] Optionally, the thickness of the first connecting ring convex is less than the thickness of the first annular side plate to form a first accommodation step on the inner or outer side of the first connecting ring convex; or,

[0017] A limiting ring convex is provided on the outer ring surface at the connection of the first annular side plate and the first connecting ring convex to form a first accommodation step on the outer side of the first connecting ring convex; and / or,

[0018] The thickness of the second connecting ring convex is less than the thickness of the second annular side plate to form a second accommodation step on the inner or outer side of the second connecting ring convex.

[0019] Optionally, the burner cap further includes a connecting plate provided inside the first connecting ring convex, and both ends of the connecting plate are respectively connected to the inner ring surface of the first connecting ring convex, and the connecting plate is used to be arranged above the main injection pipe of the bottom cup.

[0020] Optionally, the burner cap further has a first annular flame hole arranged inwardly on the first annular side plate, and the first annular flame hole communicates with the first annular combustion flame cavity; and / or,

[0021] The burner cap further has a second annular flame hole arranged outwardly on the second annular side plate, and the second annular flame hole communicates with the second annular combustion flame cavity.

[0022] Optionally, when the shunt flame holes communicate the air passing through hole and the second annular combustion flame cavity, the air outlet of the shunt flame holes is arranged above the air outlet of the first annular flame hole.

[0023] Optionally, an annular flame stabilizing groove is provided on the inner ring surface of the first annular side plate, and a third annular flame hole communicating with the first annular combustion flame cavity is provided on the lower side wall of the annular flame stabilizing groove.

[0024] Optionally, the third ring of flame holes extends in the vertical direction.

[0025] Optionally, an air inlet ring groove is provided on the outer ring surface of the first annular side plate. The upper side wall of the air inlet ring groove is correspondingly arranged with the lower side wall of the annular flame stabilizing groove. The air inlet of the third ring of flame holes is provided on the upper side wall of the air inlet ring groove.

[0026] Optionally, the bottom wall of the air inlet ring groove is connected to the outer ring surface of the first annular side plate.

[0027] Optionally, the burner cap further has a third ring combustion cavity provided outside the second ring combustion cavity.

[0028] The present invention also provides a burner, including the bottom cup as described above.

[0029] The present invention also provides a cooking stove, including the burner as described above.

[0030] It can be understood that for the solution of "the shunt flame holes communicate with the air through holes and the second ring combustion cavity", by providing the burner cap with shunt flame holes and making the shunt flame holes communicate with the air through holes and the second ring combustion cavity, the mixed gas flow in the second ring combustion cavity can be shunted to the inner side of the first ring combustion cavity through the shunt flame holes for forming the first ring flame, thus being beneficial to increasing the combustion temperature of the inner ring flame (i.e., the first ring flame); especially when the gas supply power of the ejector tube corresponding to the second ring combustion cavity is too large, part of the mixed gas in the second ring combustion cavity can be shunted to the inner side of the first ring combustion cavity through the shunt flame holes, which is beneficial to improving the power and efficiency of the whole burner, and can also improve the temperature uniformity between the first ring flame and the second ring flame.

[0031] For the solution of "the air inlet of the shunt flame holes communicates with the first ring combustion cavity, and the air outlet of the shunt flame holes is provided on the outer ring wall or the top ring wall of the second ring combustion cavity", the mixed gas flow in the first ring combustion cavity can be shunted to the outside or above the second ring combustion cavity through the shunt flame holes for forming the second ring flame, thus being beneficial to increasing the combustion temperature of the outer ring flame (i.e., the second ring flame); especially when the gas supply power of the ejector tube corresponding to the first ring combustion cavity is too large, part of the mixed gas in the first ring combustion cavity can be shunted to the outside or above the second ring combustion cavity through the shunt flame holes, which is beneficial to improving the power and efficiency of the whole burner, and can also improve the temperature uniformity between the first ring flame and the second ring flame. Description of the Drawings

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0033] Figure 1 Schematic structural diagram of a perspective view of a burner according to an embodiment of the present invention;

[0034] Figure 2 For Figure 1 Schematic structural diagram of another perspective view of the burner in

[0035] Figure 3 For Figure 1 Cross-sectional view of the burner in along a section line;

[0036] Figure 4 For Figure 3 Partial enlarged view of part A in

[0037] Figure 5 For Figure 1 Cross-sectional view of the burner in along another section line;

[0038] Figure 6 For Figure 3 Schematic structural diagram of a perspective view of the bottom cup in

[0039] Figure 7 For Figure 6 Cross-sectional view of the bottom cup in along a multi-segment section line;

[0040] Figure 8 For Figure 6 Cross-sectional view of the bottom cup in

[0041] Figure 9 For Figure 6 Schematic structural diagram of another perspective view of the bottom cup in

[0042] Figure 10 For Figure 6 Schematic diagram of a cross-section of the bottom cup in

[0043] Figure 11 For Figure 3 Schematic structural diagram of a perspective view of the fire cap in

[0044] Figure 12 For Figure 11 Schematic structural diagram of another perspective view of the fire cap in

[0045] Figure 13 For Figure 12 Cross-sectional view of the fire cap in

[0046] Figure 14 is Figure 13 Partial structural schematic diagram of the medium fire cover;

[0047] Figure 15 is Figure 11 Schematic diagram of a longitudinal section of the medium fire cover;

[0048] Figure 16 is Figure 11 Cross-sectional view of the medium fire cover;

[0049] Figure 17 is Figure 3 Structural schematic diagram of a perspective of the medium nozzle base; wherein, the nozzle is installed on the nozzle base;

[0050] Figure 18 is Figure 3 Structural schematic diagram of another perspective of the medium nozzle base;

[0051] Figure 19 is Figure 18 Bottom view of the medium nozzle base;

[0052] Figure 20 is Figure 18 Sectional structural schematic diagram of the medium nozzle base.

[0053] Explanation of the reference numerals in the attached drawings:

[0054] 100, Burner; 10, Bottom cup; 11, Cup body; 111, First annular gas chamber; 112, Second annular gas chamber; 113, Central through hole; 114, Partition plate; 1141, First partition; 1142, Second partition; 1143, First connecting partition; 1144, Second connecting partition; 115, First flow dividing plate; 116, Second flow dividing plate; 11a, Bottom plate; 11b, First annular convex part; 11c, Second annular convex part; 11d, Third annular convex part; 11e, Annular inclined side plate; 12, First ejector tube; 121, Third straight tube; 122, Third arc tube; 13, Main ejector tube; 131, First straight tube; 132, First arc tube; 14, Boost ejector tube; 141, Second straight tube; 142, Second arc tube; 20, Flame cover; 21, First annular combustion flame chamber; 22, First annular flame holes; 23, Second annular combustion flame chamber; 24, Second annular flame holes; 25, Air passing through hole; 26, Annular top plate; 27, First annular side plate; 27a, First connecting ring convex; 27b, Limiting ring convex; 27c, First accommodating step; 271, Annular flame stabilizing groove; 272, Third annular flame holes; 273, Intake annular groove; 28, Annular convex plate; 29, Second annular side plate; 29a, Second connecting ring convex; 29b, Second accommodating step; 30, Nozzle; 40, Nozzle base; 41, Mounting substrate; 411, Gas pipe assembly hole; 412, Stopping convex part; 42, Support column; 421, Gas pipe assembly channel; 422, Nozzle mounting hole; 423, Avoiding cut surface; 424, Windward side surface; 50, Divided flow flame holes; 60, Connecting plate.

[0055] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0056] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0057] It should be noted that if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, such descriptions of "first", "second", etc. are only for descriptive purposes and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first", "second" may explicitly or implicitly include at least one of such features.

[0058] In addition, the meaning of "and / or" as used throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution where both A and B are satisfied simultaneously.

[0059] The present invention provides a bottom cup and a burner. The bottom cup is for the burner, and the burner is an upward air inlet burner.

[0060] Specifically, as Figure 1-5 shown, the burner 100 includes a panel (not shown in the figure), a bottom cup 10, a burner cap 20, a nozzle 30, a nozzle base 40, etc. The bottom cup 10, the burner cap 20, and the nozzle 30 are installed above the panel, and the following will be described separately.

[0061] In an embodiment of the present invention, as Figure 2-10 shown, the bottom cup 10 includes:

[0062] a cup body 11, the cup body 11 having a first annular air chamber 111 (i.e., the first annular intake air chamber, simply referred to as the first annular air chamber 111 hereinafter), and a second annular air chamber 112 provided outside the first annular air chamber 111; and

[0063] a first ejector tube 12 and a second ejector tube. The first ejector tube 12 and the second ejector tube are both provided at the bottom of the cup body 11. The first ejector tube 12 is communicated with the first annular air chamber 111, and the second ejector tube is communicated with the second annular air chamber 112.

[0064] Specifically, the second annular air chamber 112 and the first annular air chamber 111 are spaced apart from each other radially from the inside to the outside.

[0065] Specifically, the outlet of the first ejector tube 12 is communicated with the first annular air chamber 111, and the outlet of the second ejector tube is communicated with the second annular air chamber 112.

[0066] It should be noted that in the present invention, the cup body 11 can also have more annular intake air chambers and ejector tubes arranged opposite to the intake air chambers. For example, the cup body 11 further has a third annular air chamber provided outside the second annular air chamber 112, and the bottom cup 10 further includes a third ejector tube provided at the bottom of the cup body 11 and communicated with the third annular air chamber; or the cup body 11 further has a fourth annular air chamber provided inside the first annular air chamber 111, and the bottom cup 10 further includes a fourth ejector tube provided at the bottom of the cup body 11 and communicated with the fourth annular air chamber; or the cup body 11 further has a fifth annular air chamber provided between the first annular air chamber 111 and the second annular air chamber 112, and the bottom cup 10 further includes a fifth ejector tube provided at the bottom of the cup body 11 and communicated with the fifth annular air chamber; and so on.

[0067] Moreover, it should also be noted that the above-mentioned third annular air cavity, fourth ejector tube, and fifth annular air cavity can be provided separately or simultaneously.

[0068] Moreover, it should also be noted that when the annular intake air cavity of the cup body 11 has more, the first annular air cavity 111 and the second annular air cavity 112 can be arranged adjacent to each other or non-adjacent to each other. For the convenience of explaining the present invention, in the following description, when the annular intake air cavity of the cup body 11 has more, the first annular air cavity 111 and the second annular air cavity 112 being arranged adjacent to each other is mainly taken as an example for illustration, but this is not used to limit the present invention.

[0069] In the following examples of the present invention, for the convenience of explaining the present invention, the cup body 11 having only the first annular air cavity 111 and the second annular air cavity 112 is mainly taken as an example for illustration, but this is not used to limit the present invention; moreover, when the cup body 11 has more annular intake air cavities, the corresponding structure can be adaptively set, and a simple explanation will also be given below.

[0070] Specifically, a nozzle 30 is correspondingly provided at the air inlet of each ejector tube to supply air to each ejector tube respectively, so that the air supply gas paths corresponding to each combustion chamber of the burner 100 are relatively independent, such as being able to be controlled separately for on / off and the air supply power can be adjusted separately.

[0071] Specifically, a plurality of nozzles 30 are provided, and a nozzle 30 is correspondingly provided at the air inlet of each ejector tube. The nozzle 30 is disposed opposite to the air inlet of the ejector tube corresponding thereto. The gas ejected from the nozzle 30 attracts the surrounding air (i.e., primary air) to enter the corresponding ejector tube together to form a mixed gas flow.

[0072] In this way, the mixed gas flows of air and gas can be provided to different annular intake air cavities through different ejector tubes respectively, so that each gas path can be conveniently controlled separately. Specifically, the mixed gas flow can be provided to the first annular air cavity 111 through the air inlet of the first ejector tube 12, and at the same time, the mixed gas flow can be provided to the second annular air cavity 112 through the air inlet of the second ejector tube.

[0073] After the mixed gas flow enters each annular intake air cavity, it can flow along its circumferential direction. On the one hand, it further mixes the air and gas, and on the other hand, it makes the mixed gas flow evenly distributed in each annular intake air cavity.

[0074] Furthermore, as Figure 2-10 shown, both the first ejector tube 12 and the second ejector tube are integrally connected to the bottom of the cup body 11. In this way, the assembly steps of the first ejector tube 12 and the second ejector tube with the cup body 11 can be reduced, thereby simplifying the assembly process of the burner 100.

[0075] Specifically, when more ejector tubes need to be provided, all the ejector tubes can be integrally provided with the cup body 11. However, it should be particularly noted that for a burner 100 with unique designs and individual special requirements, special ejector tubes can also be provided to be detachably connected to the cup body 11.

[0076] Furthermore, as Figure 2-10 shown, the bottom cup 10 (specifically the cup body 11) is used to be cooperatively connected with the burner cap 20 so that the first annular air cavity 111 is used to communicate with the first annular combustion cavity 21 of the burner cap 20, and the second annular air cavity 112 is used to communicate with the second annular combustion cavity 23 of the burner cap 20.

[0077] Specifically, in the present invention, the burner cap 20 has a first annular combustion cavity 21 (i.e., the first annular combustion cavity, abbreviated as the first annular combustion cavity 21, the same below) and a second annular combustion cavity 23.

[0078] When the bottom cup 10 is applied to the burner 100, the bottom cup 10 is cooperatively connected with the burner cap 20, and the first annular air cavity 111 communicates with the first annular combustion cavity 21, and the second annular air cavity 112 communicates with the second annular combustion cavity 23. Specifically, the annular air inlet cavities of the cup body 11 are all provided with upper openings, and the annular combustion cavities of the burner cap 20 are all provided with lower openings, so as to facilitate the communication between the corresponding annular air inlet cavities and the annular combustion cavities.

[0079] Specifically, as Figure 2-10 shown, the burner cap 20 further has a first annular flame hole 22 and a second annular flame hole 24. The first annular flame hole 22 communicates with the first annular combustion cavity 21, and a plurality of the first annular flame holes 22 are annularly distributed. The mixed gas flow entering the first annular combustion cavity 21 is ejected from the first annular flame hole 22 to form a first annular flame; it communicates with the second annular combustion cavity 23, and a plurality of the second annular flame holes 24 are annularly distributed. The mixed gas flow entering the second annular combustion cavity 23 is ejected from the second annular flame hole 24 to form a second annular flame.

[0080] It should be noted that when the cup body 11 has more annular air inlet cavities, the burner cap 20 should correspondingly be provided with more annular combustion cavities, and each annular combustion cavity is correspondingly provided with a flame hole.

[0081] In this way, by directly connecting the bottom cup 10 with the burner cap 20, the corresponding annular air inlet cavities and the annular combustion cavities are communicated. That is to say, for the burner 100 of the present invention, there is no need to provide a gas distribution plate. Or rather, for the burner 100 of the present invention, the gas distribution plate is integrally formed on the bottom cup 10, and the bottom cup 10 is directly connected with the burner cap 20, which can simplify the structure of the burner 100 and reduce the assembly steps of the gas distribution plate with the bottom cup 10 and the burner cap 20, thereby simplifying the assembly process of the burner 100 and reducing the production cost.

[0082] In this embodiment, at least two rows of the second annular flame holes 24 are provided.

[0083] Specifically, in the present invention, by integrally connecting the first ejector tube 12 and the second ejector tube to the bottom of the cup body 11, the assembly steps of the first ejector tube 12 and the second ejector tube with the cup body 11 can be reduced, thereby simplifying the assembly process of the burner 100. Moreover, in the present invention, there is no need to provide a gas distribution plate. Or rather, the gas distribution plate is integrally formed on the bottom cup 10, and the bottom cup 10 is directly connected with the burner cap 20, which can simplify the structure of the burner 100 and reduce the assembly steps of the gas distribution plate with the bottom cup 10 and the burner cap 20, thereby further simplifying the assembly process of the burner 100 to reduce the production cost.

[0084] In a specific embodiment, the burner cap 20 can be an integrally formed structure or can be divided into multiple cover bodies, and each cover body has at least one annular combustion cavity.

[0085] In this embodiment, the burner cap 20 is an integrally formed structure. In this way, by making the burner cap 20 an integrally formed structure, the burner cap 20 can be installed on the bottom cup 10 at one time, thereby simplifying the structure of the burner 100 and the assembly process of the burner 100. Moreover, by making the burner cap 20 an integrally formed structure, it is beneficial to increase the diameter or equivalent diameter of the air passing through hole 25 in the middle of the burner cap 20, thereby facilitating the expansion of the air supplement area of the secondary air passage.

[0086] Specifically, the cup body 11 usually further has a central through hole 113 provided inside the first annular air cavity 111, and the burner cap 20 further has an air passing through hole 25 located inside the first annular combustion cavity 21. The air passing through hole 25 and the central through hole 113 are correspondingly arranged to form a secondary air passage. In this way, the outside air can enter the central through hole 113 from the bottom of the cup body 11 (and above the panel), and sequentially pass through the central through hole 113 and the air passing through hole 25 to reach the burner cap 20 to supplement air inside the burner cap 20, so that the gas inside the burner cap 20 burns sufficiently.

[0087] Further, as Figure 2-10As shown, the second ejector tube is provided with a plurality (i.e., greater than or equal to two, the same hereinafter). Specifically, the air outlets of the plurality of second ejector tubes are spaced apart in the circumferential direction of the second annular air cavity 112.

[0088] In this way, by providing a plurality of second ejector tubes and spacing the air outlets of the plurality of second ejector tubes in the circumferential direction of the second annular air cavity 112, the mixed gas flow in the plurality of second ejector tubes can enter the second annular air cavity 112 from different circumferential positions of the second annular air cavity 112, so that a pressurizing and accelerating effect can be formed on the mixed gas flow entering the second annular air cavity 112, thereby improving the uniformity of the distribution of the mixed gas flow in the second annular air cavity 112, making the distribution of the mixed gas flow in the second annular air cavity 112 uniform or relatively uniform, thereby improving the uniformity of the circumferential distribution of the second annular flame corresponding to the burner 100, and thus increasing the power of the second annular flame.

[0089] Specifically, as Figure 2-10 shown, the second ejector tube includes a main ejector tube 13 and a booster ejector tube 14. In this embodiment, two second ejector tubes are provided, namely the main ejector tube 13 and the booster ejector tube 14, to simplify the structure of the bottom cup 10. Of course, in other embodiments, according to factors such as the diameter / equivalent diameter of the second annular air cavity 112 and the diameter / equivalent diameter of the second ejector tube, the number of second ejector tubes can be considered to be set to more, such as 3, 4, 5, or 6, etc., and the air outlets of each second ejector tube are evenly distributed or approximately evenly distributed in the circumferential direction.

[0090] Furthermore, as Figure 2-10 shown, the main ejector tube 13 is arranged below the central through hole 113 of the cup body 11, the booster ejector tube 14 is arranged on one side of the main ejector tube 13, and the first ejector tube 12 is arranged on the other side of the main ejector tube 13.

[0091] It can be understood that compared with another design of the present invention, "the first ejector tube 12 is disposed between the main ejector tube 13 and the booster ejector tube 14 and below the central through hole 113 of the cup body 11" (this is not to deny this design, but to better reflect the advantages of "the main ejector tube 13 is below the central through hole 113"), making the main ejector tube 13 disposed below the central through hole 113, and the booster ejector tube 14 and the first ejector tube 12 are respectively disposed on both sides of the main ejector tube 13. On the one hand, the outlet end of the main ejector tube 13 can extend below the second annular air cavity 112 through the lower part of the central through hole 113, so as to increase the length of the main ejector tube 13 and improve the ejecting ability of the main ejector tube 13; on the other hand, it is also convenient to design the outlet ends of the main ejector tube 13, the first ejector tube 12 and the booster ejector tube 14 to prevent them from interfering with each other. In addition, it is also beneficial to increase the effective length of the first ejector tube 12. In addition, it is also convenient to design the main ejector tube 13 thicker to enhance its ejecting ability.

[0092] Further, as Figure 2-10 shown, the cross-sectional area of the main ejector tube 13 is larger than the cross-sectional area of the booster ejector tube 14.

[0093] In this way, by making the main ejector tube 13 thicker, the ejecting ability of the main ejector tube 13 can be enhanced; moreover, the main ejector tube 13 can be the main intake pipe of the second annular air cavity 112, and the booster ejector tube 14 can be the auxiliary intake pipe. The mixed gas flow entering the second annular air cavity 112 through the booster ejector tube 14 is used to pressurize and accelerate the mixed gas flow entering the second annular air cavity 112 through the main ejector tube 13.

[0094] Further, as Figure 2-10 shown, the intake ports of the first ejector tube 12 and the second ejector tube are both located on the same side of the cup body 11.

[0095] In this way, on the one hand, it is convenient to supply gas to the burner 100, and on the other hand, it can avoid the phenomenon of air robbing between the primary air and the secondary air, that is, it is convenient to allow the air on the other side of the cup body 11 (especially the side opposite to the side where the intake ports of the ejector tubes are located) to enter the secondary air passage. In addition, it is also convenient to increase the effective lengths of the first ejector tube 12 and the second ejector tube, thereby enhancing their ejecting abilities.

[0096] Further, as Figure 2-10 shown, a partition plate 114 is provided at the bottom of the cup body 11 on the side where the intake ports of the first ejector tube 12 and the second ejector tube are located, and the intake ports of the first ejector tube 12 and the second ejector tube are both disposed on the side of the partition plate 114 away from the central through hole 113.

[0097] Specifically, the partition plate 114 is integrally connected to the outer surfaces of the first ejector tube 12 and the second ejector tube. In other words, the first ejector tube 12 and the second ejector tube both pass through the partition plate 114.

[0098] In this way, the primary air and the secondary air can be separated by the partition plate 114, thereby further avoiding the phenomenon of air snatching.

[0099] Furthermore, as Figure 2-10 shown, a first flow dividing plate 115 protrudes from the side surface of the partition plate 114 away from the central through hole 113, and the first flow dividing plate 115 is arranged between the air inlet of the first ejector tube 12 and the air inlet of the second ejector tube.

[0100] Specifically, when there are multiple second ejector tubes, the first flow dividing plate 115 is arranged between the air inlet of the first ejector tube 12 and the air inlet of the second ejector tube adjacent to the first ejector tube 12; and if there is a second ejector tube on both sides of the first ejector tube 12, then two first flow dividing plates 115 are correspondingly provided and are respectively located on both sides of the air inlet of the first ejector tube 12.

[0101] In this way, the air entering the first ejector tube 12 and the air entering the second ejector tube can be separated by the first flow dividing plate 115, thereby avoiding the phenomenon of air snatching between the primary air entering the first ejector tube 12 and the primary air entering the second ejector tube.

[0102] It can be understood that if there are multiple second ejector tubes and there are adjacent second ejector tubes, a second flow dividing plate 116 can protrude from the side surface of the partition plate 114 away from the central through hole 113, and the second flow dividing plate 116 is arranged between the air inlets of the two adjacent second ejector tubes. In this way, the phenomenon of air snatching between the primary air entering the two adjacent second ejector tubes can be avoided.

[0103] In this embodiment, as Figure 2 、 9 and shown in 10, the first flow dividing plate 115 is arranged between the air inlet of the first ejector tube 12 and the air inlet of the main ejector tube 13, and the second flow dividing plate 116 is arranged between the air inlet of the booster ejector tube 14 and the air inlet of the main ejector tube 13.

[0104] Of course, in other embodiments, the first flow dividing plate 115 and the second flow dividing plate 116 can also be arranged on the nozzle base 40, which will be specifically described below.

[0105] Furthermore, as Figure 2 、 9As shown in FIGS. 9 and 10, the air inlet of the first ejector tube 12 is provided on the side of the partition plate 114 away from the central through hole 113, and / or the air inlet of the second ejector tube is provided on the side of the partition plate 114 away from the central through hole 113. In this way, the manufacturing difficulty of the bottom cup 10 can be reduced.

[0106] Further, as Figure 2 , 9 and 10 shown, the partition plate 114 includes a first partition plate 1141 perpendicular to the air inlet end of the first ejector tube 12, a second partition plate 1142 perpendicular to the air inlet end of the second ejector tube, and a first connecting partition plate 1143 connecting the first partition plate 1141 and the second partition plate 1142.

[0107] Specifically, when there are multiple second ejector tubes, there are multiple corresponding second partition plates 1142, and the first connecting partition plate 1143 connects the second partition plates 1142 corresponding to the second ejector tubes adjacent to the first ejector tube 12.

[0108] If there are adjacent second ejector tubes, the partition plate 114 may further include a second connecting partition plate 1144, and the second connecting partition plate 1144 connects the two second partition plates 1142 respectively corresponding to the two adjacent second ejector tubes.

[0109] In this embodiment, as Figure 2 , 9 and 10 shown, a second partition plate 1142 is provided outside the main ejector tube 13, a second partition plate 1142 is provided outside the pressurizing ejector tube 14, and the second connecting partition plate 1144 connects the two second partition plates 1142; a first partition plate 1141 is provided outside the first ejector tube 12, and the first connecting partition plate 1143 connects the first partition plate 1141 and the second partition plate 1142 outside the main ejector tube 13.

[0110] In this way, the structure of the partition plate 114 can be adapted to the arrangement of each ejector tube.

[0111] In this embodiment, further, as Figure 2 , 9 and 10 shown, the first partition plate 1141 extends to the edge of the cup body 11, and / or the second partition plate 1142 outside the pressurizing ejector tube 14 extends to the edge of the cup body 11. In this way, the space below the cup body 11 can be divided into two parts by the partition plate 114 to be used as the air supply areas for forming primary air and secondary air respectively.

[0112] In this embodiment, further, as Figure 2 , 9As shown in FIGS. 9 and 10, the first flow dividing plate 115 is disposed at the connection between the first connecting partition plate 1143 and the second partition plate 1142 outside the main ejector tube 13, and the second flow dividing plate 116 is disposed at the connection between the second connecting partition plate 1144 and the second partition plate 1142 outside the main ejector tube 13.

[0113] Further, as Figure 2-10 shown, the cup body 11 includes a bottom plate 11a having a central through hole 113, and a first annular convex portion 11b, a second annular convex portion 11c, and a third annular convex portion 11d that are sequentially arranged at intervals from the inside to the outside in the radial direction on the upper surface of the bottom plate 11a. The first annular air cavity 111 is formed between the first annular convex portion 11b and the second annular convex portion 11c, and the second annular air cavity 112 is formed between the second annular convex portion 11c and the third annular convex portion 11d.

[0114] Specifically, as Figure 2-10 shown, the first annular convex portion 11b is the inner ring wall of the first annular air cavity 111; the second annular convex portion 11c is both the outer ring wall of the first annular air cavity 111 and the inner ring wall of the second annular air cavity 112; the third annular convex portion 11d is the outer ring wall of the second annular air cavity 112; the portion of the bottom plate 11a between the first annular convex portion 11b and the second annular convex portion 11c forms the bottom wall of the first annular air cavity 111, and the portion of the bottom plate 11a between the second annular convex portion 11c and the third annular convex portion 11d forms the bottom wall of the second annular air cavity 112.

[0115] Specifically, as Figure 2-10 shown, the first ejector tube 12 and the second ejector tube are disposed at the bottom of the bottom plate 11a.

[0116] In this way, the structure of the bottom cup 10 body can be simplified, making the formation of the first annular air cavity 111 and the second annular air cavity 112 simple.

[0117] Further, as Figure 2-10 shown, the cup body 11 further includes an annular inclined side plate 11e connected to the periphery of the bottom plate 11a and extending downward obliquely. In this way, the overflowing soup can flow down along the inclined annular inclined side plate 11e to the panel and is not easily introduced into the burner 100.

[0118] In this embodiment, the first partition plate 1141 extends to the edge / periphery of the annular inclined side plate 11e, and the second partition plate 1142 outside the pressurized ejector tube 14 extends to the edge / periphery of the annular inclined side plate 11e.

[0119] Specifically, the edge / periphery of the annular inclined side plate 11e is provided with a downward flanging.

[0120] Further, as Figure 2-10As shown, the main ejector tube 13 includes a first straight tube 131 having an air inlet, and a first arc tube 132 connected to the first straight tube 131. The first arc tube 132 has an air outlet, and the first arc tube 132 communicates with the second annular air cavity 112.

[0121] In this way, by making the main ejector tube 13 include the first straight tube 131 and the first arc tube 132, it is convenient for the main ejector tube 13 to communicate with the second annular air cavity 112; moreover, by providing the first arc tube 132, the mixed gas flow entering the second annular air cavity 112 through the main ejector tube 13 can be guided by the first arc tube 132, so as to facilitate the circumferential flow in the second annular air cavity 112, in order to improve the uniformity of the mixed gas flow in the second annular air cavity 112 in the circumferential direction.

[0122] Specifically, as Figure 2-10 shown, the first arc tube 132 is arranged below the first annular air cavity 111 and the second annular air cavity 112.

[0123] Furthermore, as Figure 2-10 shown, the bottom wall of the second annular air cavity 112 is recessed downward at the connection where the main ejector tube 13 communicates with the second annular air cavity 112 to form the first arc tube 132.

[0124] Specifically, the bottom wall of the second annular air cavity 112 is recessed downward at the connection where the main ejector tube 13 communicates with the second annular air cavity 112 to form a part of the lower tube wall of the first arc tube 132.

[0125] In other words, the bottom wall of the second annular air cavity 112 is missing at the connection between the first arc tube 132 and the bottom wall of the second annular air cavity 112, so that the first arc tube 132 communicates with the second annular air cavity 112.

[0126] In this way, it is convenient to process the first arc tube 132.

[0127] Specifically, as Figure 2-10 shown, the bottom wall part of the second annular air cavity 112 in the air outlet direction of the first arc tube 132 is inclined downward.

[0128] Furthermore, as Figure 2-10 shown, the booster ejector tube 14 includes a second straight tube 141 having an air inlet, and a second arc tube 142 connected to the second straight tube 141. The second arc tube 142 has an air outlet, and the second arc tube 142 communicates with the second annular air cavity 112.

[0129] Furthermore, as Figure 2-10As shown, the overall extension direction of the first arc tube 132 is the same as the overall extension direction of the second arc tube 142. For example, if the first arc tube 132 extends clockwise, the second arc tube 142 also extends clockwise; if the first arc tube 132 extends counterclockwise, the second arc tube 142 also extends counterclockwise.

[0130] In this way, the second arc tube 142 can guide the mixed gas flow into the second annular air cavity 112 in the same direction as the first arc tube 132 , thereby achieving a pressurization and acceleration effect.

[0131] Furthermore, if Figure 2-10 As shown, the pressurized ejector tube 14 is located below the second ring air cavity 112 to facilitate casting of the bottom cup 10 .

[0132] Furthermore, if Figure 2-10 As shown, the bottom wall of the second annular air cavity 112 is provided at a first notch (not marked in the figure) corresponding to the pressurized ejector tube 14, and the pressurized ejector tube 14 is provided below the first notch.

[0133] like Figure 2-10 As shown, the outer surface of the tube wall of the boost ejector tube 14 is provided with a connecting wall connected to the periphery of the first notch, and the connecting wall and the tube wall of the boost ejector tube 14 form an arc groove (not marked in the figure) connected to the first notch.

[0134] The upper tube wall of the second arc tube 142 is provided with a second notch (not marked in the figure) communicating with the arc groove, so that the second arc tube 142 is communicated with the second annular air cavity 112 .

[0135] In this way, on the one hand, it is convenient to guide the mixed gas flow into the second annular air cavity 112 , and on the other hand, it is convenient to cast the bottom cup 10 .

[0136] Furthermore, if Figure 2-10 As shown, the upper tube wall of the second arc tube 142 is missing to form a second gap. In this way, the air intake area of the second arc tube 142 communicating with the second annular air cavity 112 can be increased, and the guiding effect can be improved to improve the supercharging acceleration effect.

[0137] Furthermore, if Figure 2-10 As shown, the arc of the second annular air cavity 112 located between the gas outlet end of the main ejector tube 13 and the gas outlet end of the boost ejector tube 14 is less than π.

[0138] It can be understood that in the air supply direction of the main ejector tube 13, the farther away from the air outlet of the main ejector tube 13, the smaller the flow velocity of the mixed gas flow. Therefore, by making the radian of the second annular air cavity 112 between the air outlet end of the main ejector tube 13 and the air outlet end of the booster ejector tube 14 less than π, it is convenient to enhance the boosting and accelerating effect of the booster ejector tube 14.

[0139] Specifically, the radian of the second annular air cavity 112 between the air outlet end of the main ejector tube 13 and the air outlet end of the booster ejector tube 14 is less than or equal to π / 2, and values such as 2π / 5, π / 3, 2π / 7, π / 4, π / 5, or π / 6 can be taken.

[0140] In this way, the mixed gas flow sent by the booster ejector tube 14 can play a boosting and accelerating role on the mixed gas flow sent by the main ejector tube 13, thereby improving the uniformity of the distribution of the mixed gas flow in the second annular air cavity 112, making the distribution of the mixed gas flow in the second annular air cavity 112 uniform or relatively uniform, thereby improving the uniformity of the circumferential distribution of the second annular flame corresponding to the burner 100, and further increasing the power of the second annular flame.

[0141] Specifically, as Figure 2-10 shown, the bottom wall portion of the second annular air cavity 112 in the air outlet direction of the second arc tube 142 is inclined downward.

[0142] Furthermore, as Figure 2-10 shown, the first straight tube 131 and the second straight tube 141 are arranged at an acute angle. In this way, the guiding and accelerating effect of the booster ejector tube 14 on the mixed gas flow sent into the second annular air cavity 112 can be improved. Moreover, the effective length of the booster ejector tube 14 can also be increased.

[0143] Furthermore, as Figure 2-10 shown, the first ejector tube 12 includes a third straight tube 121 having an air inlet and a third arc tube 122 connected to the third straight tube 121. The third arc tube 122 has an air outlet, and the third arc tube 122 is communicated with the first annular air cavity 111.

[0144] In this way, by making the first ejector tube 12 include the third straight tube 121 and the third arc tube 122, it is convenient for the first ejector tube 12 to be communicated with the first annular air cavity 111; moreover, by providing the third arc tube 122, the mixed gas flow entering the first annular air cavity 111 through the first ejector tube 12 can be guided by the third arc tube 122 and is convenient to flow circumferentially in the first annular air cavity 111, so as to improve the circumferential uniformity of the mixed gas flow in the first annular air cavity 111.

[0145] Furthermore, as Figure 2-10As shown, the overall extension direction of the third arc-shaped pipe 122 is opposite to that of the first arc-shaped pipe 132. In this way, it is convenient to increase the effective length of the first ejector pipe 12, enhancing the ejecting effect and the flow guiding effect.

[0146] Furthermore, as Figure 2-10 shown, the first straight pipe 131 and the third straight pipe 121 are arranged at an acute angle. In this way, the guiding and accelerating effect of the first ejector pipe 12 on the mixed gas flow sent into the first annular gas chamber 111 can be improved, so as to improve the circumferential uniformity of the mixed gas flow in the first annular gas chamber 111. Moreover, the effective length of the first ejector pipe 12 can also be increased.

[0147] Furthermore, as Figure 2-10 shown, the first ejector pipe 12 is arranged below the first annular gas chamber 111 and the second annular gas chamber 112.

[0148] Furthermore, as Figure 2-10 shown, a third notch (not labeled in the figure) is provided on the bottom wall of the first annular gas chamber 111 corresponding to the first ejector pipe 12, and the first ejector pipe 12 is arranged below the third notch; a connecting surrounding wall convexly provided on the outer surface of the pipe wall of the first ejector pipe 12 is connected to the periphery of the third notch, and an arc-shaped groove (not labeled in the figure) communicating with the third notch is formed by enclosing between the connecting surrounding wall and the pipe wall of the first ejector pipe 12; a fourth notch (not labeled in the figure) communicating with the arc-shaped groove is provided on the upper pipe wall of the third arc-shaped pipe 122, so that the third arc-shaped pipe 122 is communicated with the first annular gas chamber 111.

[0149] In this way, on the one hand, it is convenient to guide the mixed gas flow into the first annular gas chamber 111, and on the other hand, it is also convenient to cast the bottom cup 10.

[0150] Furthermore, as Figure 2-10 shown, the upper pipe wall of the third arc-shaped pipe 122 is missing to form a fourth notch. In this way, the intake area of the third arc-shaped pipe 122 communicating with the first annular gas chamber 111 can be increased.

[0151] Furthermore, as Figure 2-10 shown, the main ejector pipe 13 is located directly below the central through hole 113.

[0152] In this way, it is convenient to increase the effective length of the main ejector pipe 13, thereby enhancing its ejecting ability, prolonging the mixing time and path of the gas and air, improving the mixing effect, and making the power of the second annular flame greater and the efficiency higher.

[0153] Furthermore, as Figure 2-10 shown, the first ejector pipe 12 and the second ejector pipe are at the same height level.

[0154] Specifically, the same height level can be understood as: the center line of the first ejector tube 12 and the center line of the second ejector tube are located on the same horizontal plane or are arranged close to the same horizontal plane.

[0155] In this way, it is beneficial to reduce the overall thick bottom of the bottom cup 10, so that the burner 100 can be thinner.

[0156] Furthermore, the bottom cup 10 is integrally formed by gravity casting. From the above description, it can be seen that the structure of the bottom cup 10 is relatively complex, and through the gravity casting process, the bottom cup 10 can be integrally formed. In this way, the manufacturing difficulty of the bottom cup 10 can be reduced, so that mass production can be realized and the production cost can be reduced.

[0157] Furthermore, as Figure 1 、 3 shown in -5 and 11 - 16, the first annular flame holes 22 are arranged inwardly, and / or the second annular flame holes 24 are arranged outwardly.

[0158] In this embodiment, the first annular flame holes 22 are arranged inwardly. Among them, the first annular flame holes 22 being arranged inwardly means that the air outlet of the first annular flame holes 22 faces the inside of the first annular combustion flame cavity 21, and includes being inclined upwardly towards the inside of the first annular combustion flame cavity 21.

[0159] In this way, when the mixed gas flow in the first annular combustion flame cavity 21 is ejected from the first annular flame holes 22, it is ejected towards the inside of the first annular combustion flame cavity 21, so that the first annular flame can be arranged close to the center of the burner cap 20 (that is, the diameter of the first annular flame can be reduced), thus facilitating the increase of the flame temperature at the center of the burner cap 20. In other words, it is beneficial to increase the diameter of the air passage hole 25.

[0160] In this embodiment, the second annular flame holes 24 are arranged outwardly. Among them, the second annular flame holes 24 being arranged outwardly means that the air outlet of the second annular flame holes 24 faces the outside of the second annular combustion flame cavity 23, and includes being inclined upwardly towards the outside of the second annular combustion flame cavity 23.

[0161] In this way, when the mixed gas flow in the second annular combustion flame cavity 23 is ejected from the second annular flame holes 24, it is ejected towards the outside of the second annular combustion flame cavity 23, so that the diameter of the second annular flame can be increased, thus facilitating the increase of the flame temperature on the peripheral side of the burner cap 20. In other words, it is beneficial to reduce the diameter of the second annular combustion flame cavity 23, so that it is beneficial to reduce the diameter of the burner cap 20, which is beneficial to realizing a miniaturized design.

[0162] Of course, in other embodiments, the first annular flame holes 22 may also be arranged upward (i.e., the air outlet of the first annular flame holes 22 faces upward above the first annular combustion cavity 21), and / or the second annular flame holes 24 may also be arranged upward (i.e., the air outlet of the second annular flame holes 24 faces upward above the second annular combustion cavity 23); for example, the first annular flame holes 22 are arranged upward and the second annular flame holes 24 are arranged outward, or the first annular flame holes 22 are arranged inward and the second annular flame holes 24 are arranged upward, and so on.

[0163] Further, as Figure 1 、 3 shown in FIGS. -5 and 11-16, the first annular flame holes 22 are further arranged upward and obliquely, so that the air outlet of the first annular flame holes 22 faces obliquely upward toward the inner side of the first annular combustion cavity 21; and / or the second annular flame holes 24 are further arranged upward and obliquely, so that the air outlet of the second annular flame holes 24 faces obliquely upward toward the outer side of the second annular combustion cavity 23.

[0164] In this embodiment, as Figure 1 、 3 shown in FIGS. -5 and 11-16, the first annular flame holes 22 are further arranged upward and obliquely, so that when the mixed gas flow in the first annular combustion cavity 21 is ejected from the first annular flame holes 22, it is ejected obliquely upward toward the inner side of the first annular combustion cavity 21.

[0165] As Figure 1 、 3 shown in FIGS. -5 and 11-16, the second annular flame holes 24 are further arranged upward and obliquely, so that when the mixed gas flow in the second annular combustion cavity 23 is ejected from the second annular flame holes 24, it is ejected obliquely upward toward the outer side of the second annular combustion cavity 23.

[0166] Further, as Figure 1 、 3 shown in FIGS. -5 and 11-16, the burner cap 20 includes an annular top plate 26, a first annular side plate 27 provided on the inner peripheral edge of the annular top plate 26, and an annular convex plate 28 protruding from the lower surface of the annular top plate 26. The first annular side plate 27 extends downward, and a first annular combustion cavity 21 is formed between the first annular side plate 27 and the annular convex plate 28. The first annular flame holes 22 are provided on the first annular side plate 27. In this way, the formation of the first annular combustion cavity 21 can be made simple, thereby simplifying the structure of the burner cap 20.

[0167] Further, as Figure 1 、 3As shown in FIGS. -5, and 11 - 16, the burner cap 20 further includes a second annular side plate 29 provided at the outer periphery of the annular top plate 26. The second annular side plate 29 extends downward. A second annular combustion chamber 23 is formed between the second annular side plate 29 and the annular convex plate 28. The second annular fire holes 24 are provided in the second annular side plate 29. In this way, the formation of the second annular combustion chamber 23 can be made simple, thereby simplifying the structure of the burner cap 20.

[0168] Further, as Figure 1 , 3 shown in FIGS. -5, and 11 - 16, the first annular side plate 27 is inclined inwardly and downwardly. In this way, on the one hand, the volume of the first annular combustion chamber 21 can be increased, and on the other hand, it is also convenient to arrange the first annular fire holes 22 so that the first annular fire holes 22 are inclined inwardly and upwardly.

[0169] Further, as Figure 1 , 3 shown in FIGS. -5, and 11 - 16, the included angle A between the center line of the first annular fire holes 22 and the horizontal plane is less than or equal to 50 degrees. In this way, it is convenient for the mixed gas flow ejected from the first annular fire holes 22 to be ejected towards the center of the burner cap 20.

[0170] It can be understood that the above structural settings of the burner cap 20 can make the first annular flame burn more fully and prevent the first annular fire holes 22 from being blocked. Moreover, making the first annular fire holes 22 inclined inwardly and upwardly can make the temperature distribution at the bottom of the pot more uniform when the pot is placed, improving the user experience.

[0171] Specifically, the upper peripheral edge of the first annular side plate 27 is arranged close to the upper peripheral edge of the annular convex plate 28. In this way, it is beneficial to increase the diameter or equivalent diameter of the air passing through holes 25.

[0172] In this embodiment, the upper end of the annular convex plate 28 is also connected to the upper end of the first annular side plate 27.

[0173] Further, as Figure 1 , 3 shown in FIGS. -5, and 11 - 16, the second annular side plate 29 is inclined outwardly and downwardly. In this way, on the one hand, the volume of the second annular combustion chamber 23 can be increased, and on the other hand, it is also convenient to arrange the second annular fire holes 24 so that the second annular fire holes 24 are inclined outwardly and upwardly.

[0174] Further, as Figure 1 , 3As shown in Figures -5 and 11 - 16, the burner cap 20 further includes a first connecting ring convex portion 27a provided at the lower peripheral edge of the first annular side plate 27 and extending downward, and the first connecting ring convex portion 27a is used for sealingly mating and connecting with the inner ring wall of the first annular air cavity 111 of the bottom cup 10; and / or,

[0175] The burner cap 20 further includes a second connecting ring convex portion 29a provided at the lower peripheral edge of the second annular side plate 29 and extending downward, and the second connecting ring convex portion 29a is used for sealingly mating and connecting with the outer ring wall of the second annular air cavity 112 of the bottom cup 10.

[0176] Wherein, in this embodiment, the inner ring wall of the first annular air cavity 111 of the bottom cup 10 is a first annular convex portion 11b, and the outer ring wall of the second annular air cavity 112 of the bottom cup 10 is a third annular convex portion 11d.

[0177] In a specific embodiment, it can be set that: a limiting ring convex portion 27b is provided on the outer ring surface at the connection of the first annular side plate 27 and the first connecting ring convex portion 27a to form a first accommodating step 27c on the outer side of the first connecting ring convex portion 27a; or, it can be set that: the thickness of the first connecting ring convex portion 27a is less than the thickness of the first annular side plate 27 to form a first accommodating step 27c on the inner side or the outer side of the first connecting ring convex portion 27a. In this embodiment, the first accommodating step 27c is formed on the outer side of the first connecting ring convex portion 27a.

[0178] In a specific embodiment, it can be set that: the thickness of the second connecting ring convex portion 29a is less than the thickness of the second annular side plate 29 to form a second accommodating step 29b on the inner side or the outer side of the second connecting ring convex portion 29a. In this embodiment, the second accommodating step 29b is formed on the outer side of the second connecting ring convex portion 29a.

[0179] Specifically, the lower end of the first connecting ring convex portion 27a protrudes downward so that the first connecting ring convex portion 27a also has the function of guiding installation.

[0180] In this embodiment, the upper end of the third annular convex portion 11d protrudes upward (that is, the upper end of the third annular convex portion 11d protrudes upward from the upper ends of other annular convex portions).

[0181] Specifically, in this embodiment, when assembling the burner 100, the burner cap 20 and the bottom cup 10 are brought closer to each other (for example, the burner cap 20 is disposed above the bottom cup 10 and the burner cap 20 is moved downward). Since the first connecting ring protrusion 27a protrudes downward, the first connecting ring protrusion 27a first assembles with the first annular protrusion 11b, that is, the first connecting ring protrusion 27a is inserted into the inner side of the first annular protrusion 11b (i.e., the central through hole 113) so that the first annular protrusion 11b is limited at the first accommodating step 27c. Since both the burner cap 20 and the bottom cup 10 are integrally formed structures, when the first connecting ring protrusion 27a and the first annular protrusion 11b are mutually limited, it can play a guiding role in the assembly of the burner cap 20 and the bottom cup 10. Then, when the burner cap 20 and the bottom cup 10 continue to approach each other, the second connecting ring protrusion 29a is inserted into the inner side of the third annular protrusion 11d so that the third annular protrusion 11d is limited at the second accommodating step 29b. During this process, the lower end of the annular convex plate 28 abuts against the upper end of the second annular protrusion 11c to enable the first annular air cavity 111 to communicate with the first annular combustion flame cavity 21 to form a first annular mixing chamber, and the second annular air cavity 112 to communicate with the second annular combustion flame cavity 23 to form a second annular mixing chamber.

[0182] After the assembly is completed, the first annular protrusion 11b is limited at the first accommodating step 27c, the upper end of the second annular protrusion 11c abuts against the lower end of the annular convex plate 28, and the third annular protrusion 11d is limited at the second accommodating step 29b.

[0183] In this way, by providing the first accommodating step 27c and limiting the first annular protrusion 11b at the first accommodating step 27c, not only can the assembly stability be improved, but also the sealing performance of the connection between the first annular protrusion 11b and the first connecting ring protrusion 27a can be improved to prevent air leakage. Moreover, by providing the second accommodating step 29b and limiting the third annular protrusion 11d at the second accommodating step 29b, not only can the assembly stability be improved, but also the sealing performance of the connection between the third annular protrusion 11d and the second connecting ring protrusion 29a can be improved to prevent air leakage. And it can be understood that since the connection between the annular convex plate 28 and the second annular protrusion 11c is located between the first annular mixing chamber and the second annular mixing chamber, the sealing requirement for the connection between the annular convex plate 28 and the second annular protrusion 11c is not high, so it is only necessary to make the lower end of the annular convex plate 28 abut against the upper end of the second annular protrusion 11c, thereby simplifying the structures of the burner cap 20 and the bottom cup 10.

[0184] Of course, in other embodiments, the first accommodation step 27c or the second accommodation step 29b may not be provided. For example, the first connecting ring convex 27a may be inserted only inside the first connecting ring convex 27a, or the second connecting ring convex 29a may be inserted only inside the third annular convex portion 11d. Alternatively, the first accommodation step 27c may be provided on the first annular convex portion 11b, and / or the second accommodation step 29b may be provided on the third annular convex portion 11d; and so on.

[0185] Further, as Figure 1 、 3 shown in FIGS. -5 and 11-16, the burner cap 20 further includes a connecting plate 60 disposed inside the first connecting ring convex 27a. Two ends of the connecting plate 60 are respectively connected to the inner ring surface of the first connecting ring convex 27a. The connecting plate 60 is used to be disposed above the main injection pipe 13 of the bottom cup 10. Specifically, the width of the connecting plate 60 is wider than the width of the main injection pipe 13.

[0186] In this way, by providing the connecting plate 60, on the one hand, the structural strength of the burner cap 20 can be enhanced, and on the other hand, the main injection pipe 13 can be protected to prevent the spilled soup from splashing onto the main injection pipe 13 and increasing the gas temperature inside the main injection pipe 13. In addition, the connecting plate 60 can also hide the main injection pipe 13, thereby improving the aesthetics of the burner 100.

[0187] Specifically, the connecting plate 60 is an arc-shaped plate, or the two side edges of the connecting plate 60 are bent and extended downward.

[0188] Further, as Figure 1 、 3 shown in FIGS. -5 and 11-16, the inner ring surface of the first annular side plate 27 is provided with an annular flame stabilizing groove 271. A third ring fire hole 272 communicating with the first ring combustion fire cavity 21 is provided on the lower side wall of the annular flame stabilizing groove 271. Specifically, a plurality of the third ring fire holes 272 are annularly distributed in the circumferential direction of the annular flame stabilizing groove 271. In this way, the combustion stability of the first ring flame can be improved.

[0189] Specifically, the annular flame stabilizing groove 271 is disposed below the air outlet of the first ring fire hole 22.

[0190] Further, as Figure 1 、 3 shown in FIGS. -5 and 11-16, the third ring fire hole 272 extends in the up and down direction. In this way, on the one hand, it is convenient for the mixed gas airflow ejected from the third ring fire hole 272 to be further mixed in the annular flame stabilizing groove 271 and then flow out; on the other hand, the structure of the burner cap 20 can be simplified and the production difficulty can be reduced.

[0191] Further, as Figure 1 、3 As shown in FIGS. -5, 11-16, an air intake annular groove 273 is provided on the outer ring surface of the first annular side plate 27. The upper side wall of the air intake annular groove 273 is arranged corresponding to the lower side wall of the annular flame stabilizing groove 271. The air inlet of the third ring-shaped flame hole 272 is arranged on the upper side wall of the air intake annular groove 273. It should be noted that the outer ring surface of the first annular side plate 27 is used to form the side ring wall surface of the first annular combustion flame cavity 21.

[0192] In this way, by providing the air intake annular groove 273, it is convenient to increase the air flow rate flowing into the third ring-shaped flame hole 272.

[0193] Furthermore, as Figure 1 、 3 shown in FIGS. -5, 11-16, the bottom wall of the air intake annular groove 273 is connected to the outer ring surface of the first annular side plate 27. That is to say, the upper side wall and the bottom wall of the air intake annular groove 273 enclose to form the air intake annular groove 273.

[0194] It should be particularly noted here that in the present invention, since both the burner cap 20 and the bottom cup 10 are integrally formed structures, the corresponding assembly processes can be reduced, which is convenient for mass production and saves processing labor and materials. Moreover, through the above structural settings, the uniformity of the temperatures of the first ring flame and the second ring flame can be improved.

[0195] In a further embodiment of the burner cap 20 of the present invention, on the basis of the above structure of the burner cap 20, further improvements are made to the burner cap 20, which will be described in detail below.

[0196] Furthermore, as Figure 1 、 3 shown in FIGS. -5, 11-16, the burner cap 20 further has shunt flame holes 50. The shunt flame holes 50 are connected to the air through holes 25 and the second annular combustion flame cavity 23; alternatively, the air inlet of the shunt flame holes 50 is communicated with the first annular combustion flame cavity 21, and the air outlet of the shunt flame holes 50 is arranged on the outer ring wall or the top ring wall of the second annular combustion flame cavity 23, so that the shunt flame holes 50 communicate the space outside or above the first annular combustion flame cavity 21 and the second annular combustion flame cavity 23.

[0197] Among them, a plurality of the shunt flame holes 50 are annularly distributed in the circumferential direction of the burner cap 20.

[0198] Among them, when the shunt flame holes 50 are connected to the air through holes 25 and the second annular combustion flame cavity 23, the air inlet of the shunt flame holes 50 is communicated with the second annular combustion flame cavity 23, and the air outlet of the shunt flame holes 50 is arranged on the inner ring wall of the first annular combustion flame cavity 21.

[0199] It can be understood that in the present invention, the air supply gas paths corresponding to the first ring mixing chamber and the second ring mixing chamber are relatively independent.

[0200] For the solution of "the shunt flame holes 50 communicate with the air through holes 25 and the second annular combustion chamber 23", by providing the burner cap 20 with shunt flame holes 50 and making the shunt flame holes 50 communicate with the air through holes 25 and the second annular combustion chamber 23, the mixed gas flow in the second annular combustion chamber 23 can be shunted to the inner side of the first annular combustion chamber 21 through the shunt flame holes 50 for forming the first annular flame, thus being beneficial to increasing the combustion temperature of the inner annular flame (i.e., the first annular flame); especially when the gas supply power of the ejector tube corresponding to the second annular combustion chamber 23 is too large, part of the mixed gas in the second annular combustion chamber 23 can be shunted to the inner side of the first annular combustion chamber 21 through the shunt flame holes 50, which is beneficial to improving the power and efficiency of the entire burner 100, and can also improve the temperature uniformity between the first annular flame and the second annular flame.

[0201] For the solution of "the air inlet of the shunt flame hole 50 communicates with the first annular combustion chamber 21, and the air outlet of the shunt flame hole 50 is arranged on the outer annular wall or the top annular wall of the second annular combustion chamber 23", the mixed gas flow in the first annular combustion chamber 21 can be shunted to the outer side or above the second annular combustion chamber 23 through the shunt flame hole 50 for forming the second annular flame, thus being beneficial to increasing the combustion temperature of the outer annular flame (i.e., the second annular flame); especially when the gas supply power of the ejector tube corresponding to the first annular combustion chamber 21 is too large, part of the mixed gas in the first annular combustion chamber 21 can be shunted to the outer side or above the second annular combustion chamber 23 through the shunt flame hole 50, which is beneficial to improving the power and efficiency of the entire burner 100, and can also improve the temperature uniformity between the first annular flame and the second annular flame.

[0202] Further, as shown in Figure 1 、 3 -5 and 11-16, the shunt flame holes 50 are inclined. In this way, it is convenient to make the shunt flame holes 50 communicate with the air through holes 25 and the second annular combustion chamber 23; or, it is convenient to make the shunt flame holes 50 communicate with the space outside or above the first annular combustion chamber 21 and the second annular combustion chamber 23. Of course, in other embodiments, the shunt flame holes 50 can also be horizontally arranged, or the shunt flame holes 50 can be bent and extended, etc.

[0203] For the solution of "the shunt flame holes 50 communicate with the air through holes 25 and the second annular combustion chamber 23", specifically, as shown in Figure 1 、 3 -5 and 11-16, the air inlet of the shunt flame hole 50 is arranged on the outer ring surface of the annular convex plate 28, and the air outlet of the shunt flame hole 50 is arranged on the inner ring surface of the first annular side plate 27. In this way, the shunt flame holes 50 can be buried in the annular convex plate 28 and the first annular side plate 27 to simplify the structure of the burner cap 20.

[0204] For the solution of "the shunt flame holes 50 communicate with the air through holes 25 and the second annular combustion flame cavity 23", specifically, as Figure 1 and 3 -5, and as shown in 11-16, the air outlet of the shunt flame holes 50 is arranged above the air outlet of the first annular flame holes 22. In this way, the formation of the shunt flame holes 50 can be prevented from interfering with the formation of the first annular flame holes 22, so as to simplify the structure of the burner cap 20.

[0205] For the solution of "the shunt flame holes 50 communicate with the space outside or above the first annular combustion flame cavity 21 and the second annular combustion flame cavity 23", specifically, the air inlet of the shunt flame holes 50 can be arranged on the inner ring surface of the annular convex plate 28, and the air outlet of the shunt flame holes 50 can be arranged on the upper surface of the annular top plate 26 or the outer ring surface of the second annular side plate 29. Optionally, the shunt flame holes 50 can pass through the second annular combustion flame cavity 23 to achieve that "the air inlet of the shunt flame holes 50 is arranged on the inner ring surface of the annular convex plate 28, and the air outlet of the shunt flame holes 50 is arranged on the upper surface of the annular top plate 26 or the outer ring surface of the second annular side plate 29".

[0206] Optionally, a flow switch (not shown in the figure) is further arranged in the shunt flame holes 50. The flow switch and the inner wall of the shunt flame holes 50 form a ventilation gap, and the flow switch is used to (adjust the size of the ventilation gap according to the air pressure in the first annular combustion flame cavity 21 or the air pressure in the second annular combustion flame cavity 23). Optionally, the flow switch includes a spring piece. When the air pressure in the first annular combustion flame cavity 21 or the air pressure in the second annular combustion flame cavity 23 increases, the spring piece can be pushed open to enlarge the ventilation gap; when the air pressure in the first annular combustion flame cavity 21 or the air pressure in the second annular combustion flame cavity 23 decreases, the spring piece resets to reduce the ventilation gap.

[0207] The structure of the nozzle base 40 will be further introduced below.

[0208] Further, as Figure 2 and 3 and as shown in 17-20, the nozzle base 40 includes:

[0209] a mounting substrate 41; and

[0210] support columns 42 protruding from the surface of the mounting substrate 41, and the support columns 42 are used to mount the nozzle 30.

[0211] Specifically, as Figure 2 and 3 and as shown in 17-20, the mounting substrate 41 is used to be mounted on the bottom cup 10, or the mounting substrate 41 is used to be mounted on the panel, so that the nozzle 30 mounted on the support columns 42 corresponds to the corresponding ejector pipe.

[0212] Specifically, a plurality of support columns 42 are provided, and a nozzle 30 is installed on each support column 42. Each ejector tube of the bottom cup 10 is correspondingly provided with a nozzle 30, and the nozzle 30 is arranged corresponding to the air inlet of the ejector tube. In this embodiment, three support columns 42 are provided, and three nozzles 30 are provided to respectively correspond to the first ejector tube 12, the main ejector tube 13, and the pressurizing ejector tube 14.

[0213] Further, a gas pipe assembly hole 411 is provided on the mounting substrate 41. The support column 42 is arranged corresponding to the gas pipe assembly hole 411, and the support column 42 has a gas pipe assembly channel 421 communicating with the gas pipe assembly hole 411 and a nozzle mounting hole 422 communicating with the gas pipe assembly channel 421. The mounting hole is used for mounting the nozzle 30.

[0214] Specifically, the gas pipe extends from below the mounting substrate 41, passes through the gas pipe assembly hole 411 and extends into the gas pipe assembly channel 421, and is connected to the nozzle 30.

[0215] In the present invention, the nozzle base 40 has a simple structure, is convenient for production, and is convenient for mass production, with low production costs.

[0216] Moreover, by providing the gas pipe assembly hole 411 on the mounting substrate 41 and providing the gas pipe assembly channel 421 communicating with the gas pipe assembly hole 411 on the support column 42, the gas pipe can extend from below the mounting substrate 41 into the gas pipe assembly channel 421 and be connected to the nozzle 30, so that the gas pipe can be fixed, thereby improving the installation stability of the gas pipe, and thus improving the connection stability between the gas pipe and the nozzle 30 to improve the use stability of the burner 100.

[0217] Further, as Figure 2 、 3 、and shown in 17 - 20, the nozzle base 40 further includes an abutting convex portion 412 protruding from the surface of the mounting substrate 41. The abutting convex portion 412 is used for abutting against the partition plate 114 at the bottom of the bottom cup 10 of the burner 100 to form a partition wall that semi - surrounds the support column 42.

[0218] Specifically, the abutting convex portion 412 is arranged close to the edge of the mounting substrate 41, or the abutting convex portion 412 is provided at the edge of the mounting substrate 41.

[0219] Thus, by providing the abutting protrusion 412 on the surface of the mounting substrate 41 to abut against the partition plate 114 at the bottom of the bottom cup 10, a partition wall that semi-surrounds the support column 42 can be formed between the abutting protrusion 412 and the partition plate 114. As a result, the space below the cup body 11 can be further divided into two parts by this partition wall, which are respectively used to form the supply areas for the primary air and the secondary air. Moreover, by providing the abutting protrusion 412, the structural strength of the mounting substrate 41 can also be enhanced.

[0220] Of course, in other embodiments, the abutting protrusion 412 may not be provided, and the partition plate 114 at the bottom of the bottom cup 10 may directly abut against the surface of the mounting substrate 41.

[0221] Furthermore, as Figure 2 、 3 、and as shown in FIGS. 17 - 20, the nozzle base 40 further includes an air diverter plate (not shown in the figures) protruding from the surface of the mounting substrate 41, and an air diverter plate is provided between every two adjacent support columns 42. Among them, the air diverter plate extends along the jet direction of the nozzle 30.

[0222] Specifically, the air diverter plate is provided between the air inlets of two adjacent injection tubes. In this way, the air entering the two adjacent injection tubes can be separated by the air diverter plate, thereby avoiding the phenomenon of air robbing in the primary air entering the two adjacent injection tubes.

[0223] In this embodiment, there are two air diverter plates. One air diverter plate is provided between the air inlets of the first injection tube 12 and the main injection tube 13, and the other air diverter plate is provided between the air inlets of the booster injection tube 14 and the main injection tube 13.

[0224] Furthermore, as Figure 2 、 3 、and as shown in FIGS. 17 - 20, the air diverter plate is provided on the air outlet side of the support column 42. Among them, the air inlet side of the support column 42 refers to the side where the nozzle 30 discharges air.

[0225] In this way, it can be avoided that the air diverter plate affects the air suction effect of the gas ejected from the nozzle 30 on the surrounding air.

[0226] Of course, in other embodiments, the diverter plate may also extend between the two support columns 42, etc.

[0227] Furthermore, as Figure 2 、 3 、and as shown in FIGS. 17 - 20, the mounting substrate 41, the support column 42, and the air diverter plate are integrally formed. In this way, assembly can be avoided, thereby simplifying the installation process of the burner 100.

[0228] Of course, in other embodiments, only the mounting substrate 41 and the support column 42 can be integrally formed, and the air diverter plate can be separately mounted (such as detachably mounted) on the mounting substrate 41; or, only the mounting substrate 41 and the air diverter plate can be integrally formed, and the support column 42 can be separately mounted (such as detachably mounted) on the mounting substrate 41; or, both the air diverter plate and the support column 42 can be separately mounted (such as detachably mounted) on the mounting substrate 41; and so on. This can reduce the production difficulty of the nozzle base 40.

[0229] Further, as Figure 2 、 3 、and as shown in FIGS. 17 - 20, the mounting hole is provided on the side surface of the support column 42, and the support column 42 has a windward side surface 424 disposed opposite to the side surface where the mounting hole is located, and the windward side surface 424 is an arc surface.

[0230] In this way, by setting the windward side surface 424 as an arc (column) surface, the wind resistance when air passes through the support column 42 can be reduced, thereby reducing the influence of the support column 42 on the air suction effect of the gas ejected by the nozzle 30 on the surrounding air.

[0231] Specifically, the windward side surface 424 is a circular arc surface. In this way, by setting the windward side surface 424 as a circular arc surface, the production difficulty can be reduced.

[0232] Further, as Figure 2 、 3 、and as shown in FIGS. 17 - 20, the support column 42 further has an avoidance cutting surface 423 that obliquely cuts the top of the support column 42 for avoiding the annular inclined side plate 11e of the bottom cup 10 of the burner 100. Among them, the avoidance cutting surface 423 is provided on the windward side of the support column 42.

[0233] Specifically, the nozzle base 40 is provided at the bottom of the bottom cup 10, and the support column 42 is arranged corresponding to the annular inclined side plate 11e of the bottom cup 10. If the support column 42 is too high, the support column 42 is likely to interfere with the annular inclined side plate 11e during assembly. By providing the avoidance cutting surface 423 at the top of the support column 42, on the one hand, the overall height of the support column 42 does not have to be reduced to avoid affecting the installation height of the nozzle 30; on the other hand, it can also prevent the support column 42 from interfering with the annular inclined side plate 11e during assembly.

[0234] Specifically, the avoidance cutting surface 423 is an inclined surface to reduce the production difficulty of the support column 42; of course, the avoidance cutting surface 423 can also be set as an arc cutting surface.

[0235] Specifically, the positions of the avoidance cutting surfaces 423 on different support columns 42 are also different to be adapted to the lower surface of the annular inclined side plate 11e.

[0236] Further, asFigure 2 , 3 , as shown in FIGS. 17 - 20, the support column 42 is arranged in a flat (column) shape.

[0237] In this way, it is convenient to form the nozzle mounting hole 422 and increase the hole length of the nozzle mounting hole 422, so as to improve the mounting stability of the nozzle 30.

[0238] Furthermore, as Figure 2 , 3 , as shown in FIGS. 17 - 20, the mounting substrate 41 is a sector plate. In this way, it is convenient to hide the nozzle base 40 under the bottom cup 10, which is beneficial to realizing the miniaturized design of the burner 100.

[0239] In this embodiment, as Figure 2 , 3 , as shown in FIGS. 17 - 20, the three support columns 42 are arranged in a row, and the center lines of the mounting holes of the support columns 42 on both sides form an acute angle with the center line of the mounting hole of the support column 42 in the middle. In other words, the center line of the mounting hole of the support column 42 corresponding to the first injection tube 12 forms an acute angle with the center line of the mounting hole of the support column 42 corresponding to the main injection tube 13, and the center line of the mounting hole of the support column 42 corresponding to the boosting injection tube 14 forms an acute angle with the center line of the mounting hole of the support column 42 corresponding to the main injection tube 13.

[0240] In this way, it is convenient to align the nozzle 30 with the air inlet of the corresponding injection tube, so as to improve the suction effect on the primary air.

[0241] For the flat (column) - shaped support column 42, the support columns 42 on both sides can be arranged at an acute angle with the support column 42 in the middle, so that the center lines of the mounting holes of the support columns 42 on both sides form an acute angle with the center line of the mounting hole of the support column 42 in the middle.

[0242] In another embodiment of the burner of the present invention, the fire cap further has a third annular combustion chamber provided outside the second annular combustion chamber. Correspondingly, the cup body further has a third annular air chamber provided outside the second annular air chamber. The bottom cup further includes a third injection tube provided at the bottom of the cup body and communicating with the third annular air chamber. The third annular combustion chamber communicates with the third annular air chamber to form a third annular mixing chamber. In this embodiment, optionally, the outer annular wall of the second annular combustion chamber is spaced from the inner annular wall of the third annular combustion chamber, and the outer annular wall of the second annular air chamber is spaced from the inner annular wall of the third annular air chamber.

[0243] The present invention also provides a gas stove, which includes a burner. The specific structure of the burner refers to the above embodiments. Since the gas stove of the present invention adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated herein one by one.

[0244] The above are only alternative embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A burner cap for a burner, characterized in that, The burner cap has: Gas passing through holes; A first annular combustion chamber disposed outside the gas passing through holes; A second annular combustion chamber disposed outside the first annular gas chamber; And Diverging flame holes that connect the gas passing through holes and the second annular combustion chamber; Alternatively, the intake ports of the diverging flame holes communicate with the first annular combustion chamber, and the outlet ports of the diverging flame holes are disposed on the outer circumferential wall or the top circumferential wall of the second annular combustion chamber; a plurality of the diverging flame holes are annularly distributed in the circumferential direction of the burner cap; The burner cap includes an annular top plate, a first annular side plate disposed on the inner periphery of the annular top plate, and an annular convex plate protruding from the lower surface of the annular top plate; A first annular combustion chamber is formed between the first annular side plate and the annular convex plate; The burner cap further includes a first connecting ring convex provided at the lower peripheral edge of the first annular side plate and extending downward; The burner cap further includes a connecting plate disposed inside the first connecting ring convex, both ends of the connecting plate are respectively connected to the inner circumferential surface of the first connecting ring convex, and the connecting plate is used to be disposed above the main injection pipe of the bottom cup; An annular flame stabilizing groove is provided on the inner circumferential surface of the first annular side plate, and third annular flame holes communicating with the first annular combustion chamber are provided on the lower side wall of the annular flame stabilizing groove; The third annular flame holes extend in the up and down direction; An intake annular groove is provided on the outer circumferential surface of the first annular side plate, the upper side wall of the intake annular groove is correspondingly arranged with the lower side wall of the annular flame stabilizing groove, and the intake ports of the third annular flame holes are disposed on the upper side wall of the intake annular groove; The bottom wall of the intake annular groove is connected to the outer circumferential surface of the first annular side plate.

2. The burner cap according to claim 1, characterized in that, The diverging flame holes are inclined.

3. The burner cap according to claim 2, characterized in that, The burner cap further includes a second annular side plate disposed on the outer periphery of the annular top plate, and a second annular combustion chamber is formed between the second annular side plate and the annular convex plate; The intake ports of the diverging flame holes are disposed on the outer circumferential surface of the annular convex plate, and the outlet ports of the diverging flame holes are disposed on the inner circumferential surface of the first annular side plate.

4. The burner cap according to claim 3, characterized in that, The second annular side plate is inclined outward and downward.

5. The burner cap according to claim 4, wherein, The burner cap further includes a second connecting ring convex provided at the lower peripheral edge of the second annular side plate and extending downward, and the second connecting ring convex is used for sealingly mating and connecting with the outer circumferential wall of the second annular gas chamber of the bottom cup.

6. The burner cap according to claim 5, characterized in that, The thickness of the second connecting ring convex is less than the thickness of the second annular side plate to form a second accommodation step on the inner side or the outer side of the second connecting ring convex.

7. The burner cap according to claim 3, characterized in that, The burner cap further has second annular flame holes disposed outward on the second annular side plate, and the second annular flame holes communicate with the second annular combustion chamber.

8. The burner cap according to claim 7, wherein, The burner cap further has first annular flame holes disposed inward on the first annular side plate, and the first annular flame holes communicate with the first annular combustion chamber; When the diverging flame holes connect the gas passing through holes and the second annular combustion chamber, the outlet ports of the diverging flame holes are disposed above the outlet ports of the first annular flame holes.

9. The burner cap according to claim 1, wherein The first annular side plate is inclined inward and downward.

10. The burner cap according to claim 1, characterized in that, The burner cap further has first annular flame holes disposed inward on the first annular side plate, and the first annular flame holes communicate with the first annular combustion chamber.

11. The burner cap according to claim 1, characterized in that, The first connecting ring convex is used for sealingly mating and connecting with the inner circumferential wall of the first annular gas chamber of the bottom cup.

12. The burner cap according to claim 1, characterized in that, The thickness of the convex part of the first connecting ring is less than the thickness of the first annular side plate, so as to form a first accommodation step on the inner or outer side of the convex part of the first connecting ring; Or, A limiting ring convex is arranged on the outer ring surface at the connection of the first annular side plate and the convex part of the first connecting ring, so as to form a first accommodation step on the outer side of the convex part of the first connecting ring.

13. The burner cap according to any one of claims 1 to 12, characterized in that, The burner cap further has a third annular combustion cavity arranged on the outer side of the second annular combustion cavity.

14. A burner, characterized in that, Comprising the burner cap according to any one of claims 1 to 13.

15. The burner according to claim 14, characterized in that, Further comprising a bottom cup, the bottom cup comprising: A cup body having a first annular air cavity and a second annular air cavity arranged on the outer side of the first annular air cavity. The first annular air cavity is used for communicating with the first annular combustion cavity of the burner cap, and the second annular air cavity is used for communicating with the second annular combustion cavity of the burner cap; and, A first ejector tube and a second ejector tube, both the first ejector tube and the second ejector tube are arranged at the bottom of the cup body. The first ejector tube is communicated with the first annular air cavity, and the second ejector tube is communicated with the second annular air cavity; The second ejector tube comprises a main ejector tube and a boosting ejector tube. The boosting ejector tube is arranged on one side of the main ejector tube, and the first ejector tube is arranged on the other side of the main ejector tube; The main ejector tube comprises a first straight tube and a first arc tube. The boosting ejector tube comprises a second straight tube and a second arc tube. The first ejector tube comprises a third straight tube and a third arc tube. The first straight tube and the second straight tube are arranged at an acute angle. The first straight tube and the third straight tube are arranged at an acute angle. The extending direction of the third arc tube is opposite to the extending direction of the first arc tube.

16. A cooking appliance, characterized in that, Comprising the burner according to claim 14 or 15.

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