Gas distributors, burners and gas stoves

Abstract

The present invention discloses a gas distribution plate, a burner, and a gas stove. The gas distribution plate has at least two annular gas channels and secondary air channels spaced radially from the inside out. The secondary air channels include a central air channel located inside the innermost annular gas channel, and a concealed air channel that passes through at least one of the annular gas channels and connects the outside air to the central air channel. This allows outside air to be supplied to the center of the burner through the concealed air channel and the central air channel, replenishing the annular flame located in the inner ring of the burner during operation. This addresses the problem of insufficient air supply to the center of the burner and gas stove during use.

Description

Technical Field

[0001] The present invention relates to the technical field of gas stoves, and in particular to a gas distribution plate, a burner and a gas stove. Background Art

[0002] In the related art, in order to improve the firepower and uniformity of a gas stove, its burner adopts a three-ring fire mode. That is, when the burner is in operation, three rings of flames are formed from the inside out: an inner ring fire, a middle ring fire, and an outer ring fire. Specifically, the central through hole in the middle of the two-ring fire burner is replaced with a new air supply channel to achieve a three-ring fire supply. However, when the gas stove is in use, air can only be replenished from the side of the gas stove, which can easily lead to insufficient air supply. This is especially true for the inner ring fire. The air from the side of the gas stove needs to pass through the outer ring fire and the middle ring fire before reaching the inner ring fire. However, since the outer ring fire and the middle ring fire need to continuously consume this air, it is easy for the inner ring fire to suffer from insufficient air supply. Summary of the Invention

[0003] The main purpose of the present invention is to provide an air distribution plate, which aims to solve the technical problem of insufficient air supply that easily occurs during the use of a gas stove in the related art.

[0004] To achieve the above objectives, the present invention provides a gas distribution plate, which has:

[0005] At least two annular gas passages spaced apart from each other in the radial direction from the inside to the outside; and

[0006] The secondary air passage includes a central air passage located inside the innermost annular gas passage, and a concealed air passage passing through at least one of the annular gas passages to connect the outside air with the central air passage.

[0007] Optionally, there are three annular gas channels, namely an outer annular gas channel, a middle annular gas channel and an inner annular gas channel, and the central air channel is provided on the inner side of the inner annular gas channel.

[0008] Optionally, the inner ring wall of the outer ring gas channel and the outer ring wall of the middle ring gas channel are spaced apart;

[0009] The concealed air channel includes a spacing air channel located between the inner ring wall of the outer ring gas channel and the outer ring wall of the middle ring gas channel and connected to the outside air, and an inner transverse air channel that passes through the middle ring gas channel and the inner ring gas channel in sequence and connects the spacing air channel and the central air channel.

[0010] Optionally, the secondary air passage further includes an outer transverse air passage passing through the outer ring gas passage to connect the spacing air passage with the outside air.

[0011] Optionally, a plurality of outer transverse air passages are spaced apart and distributed in the circumferential direction of the outer ring gas passage.

[0012] Optionally, one of the outer transverse air channels is arranged corresponding to the inner transverse air channel.

[0013] Optionally, the inner transverse air channel is arranged to gradually expand in the radial outward direction, and / or the outer transverse air channel is arranged to gradually expand in the radial outward direction.

[0014] Optionally, the circumferential width of the inner transverse air channel is gradually increased in the radially outward direction, so that the inner transverse air channel is gradually expanded in the radially outward direction; and / or,

[0015] The circumferential width of the outer transverse air channel is gradually increased in the radial outward direction, so that the outer transverse air channel is gradually expanded in the radial outward direction.

[0016] Optionally, the inner ring wall of the middle ring gas channel and the outer ring wall of the inner ring gas channel are the same ring wall, and / or the inner ring wall of the inner ring gas channel is used to form a side wall of the central air channel.

[0017] Optionally, the gas distribution plate includes an annular partition plate arranged between the inner ring wall of the outer ring gas channel and the outer ring wall of the middle ring gas channel, and connecting the inner ring wall of the outer ring gas channel and the outer ring wall of the middle ring gas channel, and the spacing air channel is formed on the upper side of the annular partition plate.

[0018] Optionally, the outer periphery of the annular separation plate is connected to the lower channel wall of the outer transverse air channel, and / or the inner periphery of the annular separation plate is connected to the lower channel wall of the inner transverse air channel.

[0019] Optionally, the lower end of the outer ring wall of the innermost annular gas channel protrudes downward from the ring walls of other annular gas channels to form a guiding installation structure when assembled with the burner head assembly.

[0020] The present invention also provides a burner comprising the gas distribution plate as described above.

[0021] The present invention also provides a gas stove comprising the burner as described above.

[0022] The air distribution plate of the present invention, by providing a secondary air channel, can allow external air to be supplied to the middle part of the burner through the hidden air channel and the central air channel, so that the annular fire located in the inner circle when the burner is working can be supplemented with air to ensure sufficient combustion of the fuel, that is, it can solve the problem of insufficient air supply in the middle part that is easy to occur during the use of the burner and the gas stove. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0024] Figure 1 A schematic structural diagram of a burner according to an embodiment of the present invention from a perspective;

[0025] Figure 2 for Figure 1 A schematic structural diagram of the burner from another perspective;

[0026] Figure 3 for Figure 1 A cross-sectional view of the middle burner through the center line of the detachable ejector tube;

[0027] Figure 4 for Figure 3 A schematic diagram of the local structure of the middle part of the upper end of the middle burner;

[0028] Figure 5 for Figure 1 A cross-sectional view of the middle burner through the center line of the first ejector pipe joint;

[0029] Figure 6 for Figure 1 A cross-sectional view of the middle burner passing through a center line of a first combustion hole;

[0030] Figure 7 for Figure 3 A schematic structural diagram of the middle burner from one perspective;

[0031] Figure 8 for Figure 7 Schematic diagram of the cross-section structure of the middle burner;

[0032] Figure 9 for Figure 7 A structural diagram of the middle burner from another perspective;

[0033] Figure 10 for Figure 3 Schematic diagram of the structure of the central gas plate;

[0034] Figure 11 for Figure 10 Schematic diagram of the cross-sectional structure of the central gas disc;

[0035] Figure 12 for Figure 3 A schematic diagram of the structure of the central ring fire cover from one perspective;

[0036] Figure 13 for Figure 12 A structural diagram of the central ring fire cover from another perspective;

[0037] Figure 14 for Figure 12 Cross-sectional view of the middle ring fire cover;

[0038] Figure 15 for Figure 12 A schematic diagram of the cross-sectional structure of the middle ring fire cover through a first combustion hole;

[0039] Figure 16 for Figure 3 A schematic diagram of the structure of the inner and outer ring fire covers from one perspective;

[0040] Figure 17 for Figure 16 Schematic diagram of the structure of the inner and outer ring fire covers from another perspective;

[0041] Figure 18 for Figure 16 Schematic diagram of the cross-sectional structure of the inner and outer ring fire covers;

[0042] Figure 19 for Figure 3 A schematic diagram of the structure of the inner ring fire cover from one angle;

[0043] Figure 20 for Figure 19 Schematic diagram of the structure of the inner ring fire cover from another perspective;

[0044] Figure 21 for Figure 19 Cross-sectional view of the center ring fire cover.

[0045] Description of Figure Numbers:

[0046] 100. Burner; 10. Burner head assembly; 11. Burner head; 1a. Outer ring air inlet channel; 1b. Middle ring air inlet channel; 1c. Center air inlet channel; 12. First ejector pipe joint; 13. Inner ring annular portion; 131. Inner ring semi-annular air inlet convex portion; 132. Mounting convex portion; 1321. Mounting hole; 133. Extended annular convex portion; 134. Inner ring air inlet groove; 135. Center through hole; 14. Inner and outer connecting portions; 15. Outer ring annular portion; 151. Outer ring air inlet groove; 152. Outer ring semi-annular air inlet convex portion; 16. Second ejector pipe joint; 18. Removable ejector pipe; 18 1. Vertical mounting portion; 182. Horizontal air inlet; 183. Connecting lug; 1831. Connecting hole; 20. Gas distributor; 21. Outer ring gas channel; 211. Inner ring wall of outer ring gas channel; 22. Middle ring gas channel; 221. Outer ring wall of middle ring gas channel; 222. Inner ring wall of middle ring gas channel; 23. Inner ring gas channel; 231. Inner ring wall of inner ring gas channel; 24. Secondary air channel; 241. Spacing air channel; 242. Center air channel; 243. Inner lateral air channel; 244. Outer lateral air channel; 25. Annular partition Plate; 30, fire cover assembly; 31, outer ring fire cover; 311, outer ring fire cavity; 312, outer ring fire hole; 32, middle ring fire cover; 321, middle ring fire cavity; 322, middle ring fire hole; 3221, first fire hole; 3222, second fire hole; 3223, gas connection port; 323, middle ring hole; 324, middle ring outer ring wall; 3241, ignition hole; 3242, annular flame stabilizing groove; 325, middle ring top wall; 326, middle ring inner ring wall; 327, second hook; 3271, second support protrusion; 3272, second positioning protrusion; 33, inner ring fire cover; 34, middle ring fire cavity; 34, middle ring fire hole ... Cover; 331, inner ring combustion cavity; 332, inner ring combustion hole; 333, inner ring hole; 334, annular cover body; 3341, annular receiving groove; 3342, annular connecting portion; 3343, annular inclined portion; 3344, annular convex portion; 3345, annular protrusion; 3346, guide notch; 335, inner ring wall of inner ring; 336, first hook; 3361, first supporting protrusion; 3362, first positioning protrusion; 3363, limiting protrusion; 3364, positioning groove; 40, flameout protection needle; 50, first universal ejector tube; 60, second universal ejector tube.

[0047] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0049] It should be noted that if the embodiments of the present invention include descriptions of "first," "second," etc., these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of these features.

[0050] In addition, the meaning of "and / or" appearing in the full text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution in which both A and B are satisfied.

[0051] The invention provides a gas distribution plate, a burner and a gas stove.

[0052] In one embodiment of the present invention, Figure 1 As shown, the burner 100 includes a burner head assembly 10, a gas distribution plate 20, and a flame cover assembly 30. The gas distribution plate 20 is disposed above the burner head assembly 10, and the flame cover assembly 30 is disposed above the gas distribution plate 20. According to the number of (annular) flame rings, burners can be divided into single-ring burners, double-ring burners, triple-ring burners, and multiple-ring burners. The structure of the burner head of the present invention will be described in detail below, mainly taking the triple-ring burner as an example.

[0053] The structures of the burner head assembly 10, the gas distribution plate 20 and the fire cover assembly 30 and their matching structures are described in detail below.

[0054] The present invention will be described below mainly with respect to the gas distribution plate 20 .

[0055] In one embodiment, if Figure 3 、 9 As shown in Figure 10, the gas distribution plate 20 has at least two annular gas channels and a secondary air channel radially spaced from the inside to the outside. The secondary air channel includes a central air channel located inside the innermost annular gas channel, and a concealed air channel that passes through at least one of the annular gas channels and connects the outside air with the central air channel.

[0056] In this embodiment, there are three annular gas channels, namely an outer ring gas channel 21 , a middle ring gas channel 22 and an inner ring gas channel 23 . The central air channel 242 is provided on the inner side of the inner ring gas channel 23 .

[0057] Correspondingly, such as Figure 2-8 As shown, the burner assembly 10 has at least two air inlet channels spaced apart from each other along the radial direction from the inside to the outside, so as to correspond to the at least two annular gas channels respectively.

[0058] In this embodiment, there are three intake channels, namely the outer ring intake channel 1a, the middle ring intake channel 1b and the central intake channel 1c. The outer ring intake channel 1a and the middle ring intake channel 1b are both annular channels, and the central intake channel 1c is a through hole.

[0059] The gas distribution plate 20 is installed above the burner head assembly 10, the outer ring gas channel 21 is connected to the outer ring air intake channel 1a, the middle ring gas channel 22 is connected to the middle ring air intake channel 1b, and the inner ring gas channel 23 is connected to the center air intake channel 1c.

[0060] Correspondingly, such as Figure 2-5 As shown in , and 11-20, the fire cover assembly 30 includes at least two fire covers, which are respectively arranged to correspond to at least two annular gas channels.

[0061] In this embodiment, there are three fire covers, namely an outer ring fire cover 31, a middle ring fire cover 32 and an inner ring fire cover 33. The fire cover assembly 30 is installed on the gas distribution plate 20. The outer ring fire cover 31, the middle ring fire cover 32 and the inner ring fire cover 33 are all annular parts, and they all have annular holes. Among them, the annular hole of the outer ring fire cover 31 is an outer ring ring hole, the annular hole of the middle ring fire cover 32 is a middle ring ring hole 323, and the annular hole of the inner ring fire cover 33 is an inner ring ring hole 333.

[0062] Specifically, such as Figure 2-5 , and 11-20, the outer ring fire cover 31 is installed above the gas distribution plate 20, and the outer ring fire cover 31 has a ring-shaped outer ring fire cavity 311 and an outer ring fire hole 312 connected to the outer ring fire cavity 311. The outer ring fire cavity 311 is connected to the outer ring gas channel 21. The gas entering the outer ring air inlet channel 1a can pass through the outer ring gas channel 21 and the outer ring fire cavity 311 in turn, and then be ejected from the outer ring fire hole 312 to form an outer ring fire after combustion.

[0063] like Figure 2-5, and 11-20, the middle ring fire cover 32 is installed above the gas distribution plate 20, and the middle ring fire cover 32 has a ring-shaped middle ring fire cavity 321 and a middle ring fire hole 322 connected to the middle ring fire cavity 321. The middle ring fire cavity 321 is connected to the middle ring gas channel 22. The gas entering the middle ring air inlet channel 1b can pass through the middle ring gas channel 22 and the middle ring fire cavity 321 in sequence, and then be ejected from the middle ring fire hole 322 to form a middle ring fire after combustion.

[0064] As for the inner ring fire cover 33, the inner ring fire cover 33 can be installed above the gas distribution plate 20. The inner ring fire cover 33 has an inner ring fire cavity 331 arranged in an annular manner, and an inner ring fire hole 332 connected to the inner ring fire cavity 331. The inner ring fire cavity 331 is connected to the inner ring gas channel 23. The gas entering the central air inlet channel 1c can pass through the inner ring gas channel 23 and the inner ring fire cavity 331 in sequence, and then be ejected from the inner ring fire hole 332 to form an inner ring fire after combustion. Or, as Figure 2-5 , and 11-20, the inner ring fire cover 33 is installed on the middle ring fire cover 32, and the inner ring fire cover 33 and the middle ring fire cover 32 enclose an inner ring fire cavity 331 arranged in an annular shape, and an inner ring fire hole 332 connected to the inner ring fire cavity 331. The inner ring fire cavity 331 is connected to the inner ring gas channel 23. The gas entering the central air inlet channel 1c can pass through the inner ring gas channel 23 and the inner ring fire cavity 331 in turn, and then be ejected from the inner ring fire hole 332 to form an inner ring fire after combustion.

[0065] The inner ring hole 333 of the inner ring fire cover 33 is in communication with the central air passage 242. External air can enter the central air passage 242 through the concealed air passage, then pass through the central air passage 242 and the inner ring hole 333, and flow out from the outlet at the upper end of the inner ring hole 333, thereby supplying air to the inner ring fire and the middle ring fire, and thus supplying air to the combustion of the burner 100, so as to solve the problem of insufficient air supply that is prone to occur during the use of the three-ring fire burner 100 and the gas stove, so as to ensure that the gas flowing out of the inner ring fire hole 332 of the inner fire cover and the middle ring fire hole 322 of the middle fire cover is fully burned.

[0066] The gas distribution plate 20 of the present invention, by providing a secondary air channel 24, can allow external air to be supplied to the middle part of the burner 100 through the hidden air channel and the central air channel 242, so that the annular flame located in the inner circle of the burner 100 can be supplemented with air to ensure sufficient combustion of the fuel, that is, it can solve the problem of insufficient air supply in the middle part during the use of the burner 100 and the gas stove.

[0067] Further, if Figure 3 、 9As shown in FIG10 , the inner ring wall 211 of the outer ring gas channel is spaced from the outer ring wall 221 of the middle ring gas channel. In this way, the distance between the outer ring gas channel 21 and the middle ring gas channel 22 can be increased to avoid excessive temperature concentration at the bottom of the cookware and increase flame uniformity.

[0068] like Figure 3 、 9 As shown in Figure 10, the concealed air channel of the gas distribution plate includes a spacing air channel 241 located between the inner ring wall 211 of the outer ring gas channel and the outer ring wall 221 of the middle ring gas channel and connected to the outside air, a central air channel 242 located on the inner side of the inner ring gas channel 23, and an inner transverse air channel 243 that passes through the middle ring gas channel 22 and the inner ring gas channel 23 in sequence and connects the spacing air channel 241 and the central air channel 242.

[0069] The inner ring hole 333 of the inner ring fire cover 33 is connected to the central air channel 242. External air can pass through the interval air channel 241, the inner transverse air channel 243, the central air channel 242 and the inner ring hole 333 in sequence, and flow out from the outlet at the upper end of the inner ring hole 333, thereby supplying air to the inner ring fire and the middle ring fire, and thus supplying air to the combustion of the burner 100, so as to solve the problem of insufficient air supply that is prone to occur during the use of the three-ring fire burner 100 and the gas stove, so as to ensure that the gas flowing out of the inner ring fire hole 332 of the inner fire cover and the middle ring fire hole 322 of the middle fire cover is fully burned.

[0070] Thus, the secondary air passage 24 is provided according to the original structure of the gas distribution plate 20 of the triple-ring fire burner, which not only increases the amount of secondary air sucked in, but also simplifies the structure of the gas distribution plate 20 .

[0071] Furthermore, if Figure 3 、 9 As shown in Figure 10 , the concealed air passage also includes an outer transverse air passage 244 that passes through the outer ring gas passage 21 and connects the interval air passage 241 with the outside air.

[0072] In this way, the external air around the burner 100 / gas stove can flow from the outer transverse air channel 244 into the spaced air channel 241 and then flow to the middle of the burner 100 , thereby facilitating air replenishment for the burner 100 .

[0073] Furthermore, if Figure 3 、 9 As shown in FIG10 , a plurality of outer transverse air passages 244 are distributed at intervals in the circumferential direction of the outer ring gas passage 21 .

[0074] In this way, the amount of external air fed can be increased, so that the three-ring fire burner 100 and the gas stove are adequately supplied with air during use.

[0075] Specifically, the number of the outer transverse air channels 244 is greater than or equal to 2 and less than or equal to 10, such as 3, 4, 5, 6, 7, 8, etc.

[0076] Furthermore, if Figure 3 、 9 As shown in FIG10 , one of the outer transverse air passages 244 is provided corresponding to the inner transverse air passage 243. In this way, the outside air entering the spacer air passage 241 from the outer transverse air passage 244 can flow into the inner transverse air passage 243 to improve the air supply speed and efficiency.

[0077] Furthermore, if Figure 3 、 9 As shown in FIG10 , the outer transverse air passage 244 is gradually expanded in the radially outward direction, and / or the inner transverse air passage 243 is gradually expanded in the radially outward direction.

[0078] In this way, the air inlet of the outer transverse air channel 244 and / or the inner transverse air channel 243 can be made larger, thereby facilitating the flow of outside air into the outer transverse air channel 244 and / or facilitating the flow of air in the spacing air channel 241 into the inner transverse air channel 243.

[0079] In this embodiment, the outer transverse air passage 244 is gradually expanded in the radial outward direction, and the inner transverse air passage 243 is gradually expanded in the radial outward direction.

[0080] Furthermore, if Figure 3 、 9 As shown in FIG10 , the circumferential width of the inner transverse air passage 243 is gradually increased in the radially outward direction, so that the inner transverse air passage 243 is gradually expanded in the radially outward direction.

[0081] Of course, the inner transverse air channel 243 may be gradually expanded in the radially outward direction by other means, for example, the axial height of the inner transverse air channel 243 may be gradually increased in the radially outward direction, etc.

[0082] Furthermore, if Figure 3 、 9 As shown in FIG. 10 , the circumferential width of the outer transverse air passage 244 is gradually increased in the radially outward direction, so that the outer transverse air passage 244 is gradually expanded in the radially outward direction.

[0083] Of course, the outer transverse air channel 244 may be configured to gradually expand in the radially outward direction by other means, such as configuring the axial height of the outer transverse air channel 244 to gradually increase in the radially outward direction, etc.

[0084] It should be noted that the channel walls of the multiple outer transverse air channels 244 can separate multiple outer ring gas through holes (not marked in the figure) distributed at intervals along the circumferential direction in the outer ring gas channel 21.

[0085] Further, if Figure 3 、 9 As shown in Figures 10 and 11 , the inner annular wall 222 of the middle annular gas channel and the outer annular wall of the inner annular gas channel 23 are the same annular wall, and / or the inner annular wall 231 of the inner annular gas channel is used to form the side wall of the central air channel 242. In this embodiment, the inner annular wall 222 of the middle annular gas channel and the outer annular wall of the inner annular gas channel 23 are the same annular wall, and the inner annular wall 231 of the inner annular gas channel is used to form the side wall of the central air channel 242.

[0086] In this way, by making the inner ring wall 222 of the middle ring gas channel and the outer ring wall of the inner ring gas channel 23 the same ring wall, the distance between the middle ring gas channel 22 and the inner ring gas channel 23 can be reduced. On the one hand, it is beneficial to reduce the radial size of the gas distribution plate 20, and on the other hand, it is also convenient to reduce the distance between the middle ring fire and the inner ring fire, thereby facilitating the improvement of the firepower in the middle part of the burner 100.

[0087] Moreover, by using the inner ring wall 231 of the inner ring gas channel to form the side wall of the central air channel 242, on the one hand, it is beneficial to reduce the radial size of the gas distribution plate 20, and on the other hand, it is convenient to increase the central through hole 135 or increase the inner ring gas channel 23.

[0088] Further, if Figure 3 、 9 As shown in Figures 10 and 10, the gas distribution plate 20 includes an annular partition plate 25 which is arranged between the inner ring wall 211 of the outer ring gas channel and the outer ring wall 221 of the middle ring gas channel, and connects the inner ring wall 211 of the outer ring gas channel and the outer ring wall 221 of the middle ring gas channel, and the spacing air channel 241 is formed on the upper side of the annular partition plate 25.

[0089] In this way, the inner ring wall 211 of the outer ring gas channel and the outer ring wall 221 of the middle ring gas channel can be connected through the annular partition plate 25 .

[0090] Further, if Figure 3 、 9As shown in Figures 10 and 10 , the outer periphery of the annular partition plate 25 is connected to the lower channel wall of the outer transverse air channel 244, and / or the inner periphery of the annular partition plate 25 is connected to the lower channel wall of the inner transverse air channel 243. This simplifies the structure of the air distribution plate 20 and makes the concealed air channel smoother, facilitating air circulation and absorption.

[0091] Of course, in other embodiments, air holes may be provided on the annular partition plate 25 so that the outside air below the burner 100 and the gas stove may also enter the spacing air channel 241; or, the inner ring wall 211 of the outer ring gas channel and the outer ring wall 221 of the middle ring gas channel may be connected by a plurality of connecting ribs distributed at intervals along the circumference, and ventilation gaps may be formed between adjacent connecting ribs so that the outside air below the burner 100 and the gas stove may also enter the spacing air channel 241; and so on.

[0092] Furthermore, if Figure 3 、 9 As shown in FIG10 , the lower end of the outer ring wall of the innermost annular gas channel protrudes downward from the ring walls of the other annular gas channels to form a guide installation structure when assembled with the burner head assembly 10 .

[0093] In this embodiment, the lower end of the outer ring wall of the inner ring gas channel 23 protrudes downward from the ring walls of other ring gas channels to form a guiding installation structure when assembled with the burner head assembly 10 .

[0094] In this way, when assembling the gas distribution plate 20 and the burner head assembly 10, the downward protruding part of the inner ring wall 231 of the inner ring gas channel can be aligned with the central air intake channel 1c of the burner head assembly 10 first. For example, the inner ring wall 231 of the inner ring gas channel can be first sleeved on the outside of the side wall of the central air intake channel 1c, or the inner ring wall 231 of the inner ring gas channel can be first sleeved on the inside of the central air intake channel 1c, and then the gas distribution plate 20 and the burner head assembly 10 are guided close to each other to achieve guided installation.

[0095] The present invention will be described below mainly based on the fire cover assembly 30 in which the inner ring fire cover 33 and the middle ring fire cover 32 are stacked to form an inner ring combustion chamber 331 .

[0096] In one embodiment, if Figure 2-5 As shown, the fire cover assembly 30 includes a middle ring fire cover 32 and an inner ring fire cover 33 , and the inner ring fire cover 33 and the middle ring fire cover 32 are stacked to form an inner ring combustion chamber 331 between the inner ring fire cover 33 and the middle ring fire cover 32 .

[0097] Specifically, such as Figure 11-14As shown, the middle ring fire cover 32 has a middle ring hole 323, a middle ring fire cavity 321 with an opening at the lower end, and a middle ring fire hole 322 communicating with the middle ring fire cavity 321. The middle ring hole 323 is a through hole, and the middle ring fire cavity 321 is an annular cavity.

[0098] The inner ring fire cover 33 is installed on the middle ring fire cover 32 .

[0099] Specifically, the inner ring fire cover 33 is installed on the middle ring hole 323 , and the inner ring fire cover 33 and the middle ring fire cover 32 enclose an inner ring fire cavity 331 . The middle ring fire cover 32 is provided with an inner ring fire hole 332 connected to the inner ring fire cavity 331 .

[0100] In this way, the fire cover assembly 30 of the present invention is installed by stacking the inner ring fire cover 33 on the middle ring fire cover 32, so that the inner ring fire cover 33 and the middle ring fire cover 32 form an inner ring combustion chamber 331. The inner ring combustion chamber 331 is formed with the help of the middle ring fire cover 32. On the one hand, it can be beneficial to reduce the radial size of the burner 100, and on the other hand, it can also be beneficial to increase the inner ring combustion chamber 331, so that the inner ring combustion chamber 331 can be increased on the basis of realizing the miniaturization design of the burner 100 and the gas stove.

[0101] Specifically, such as Figure 11-14 As shown, the inner ring fire cover 33 includes an annular cover body 334 and an inner ring inner ring wall 335, and the inner ring inner ring wall 335 is arranged on the lower surface of the annular cover body 334, and the periphery of the annular cover body 334 is sealed and connected with the periphery of the middle ring hole 323, and the inner ring inner ring wall 335 is arranged in the middle ring hole 323 to enclose an inner ring fire cavity 331 between the inner ring fire cover 33 and the middle ring fire cover 32, wherein the annular cover body 334 is or is approximately annular plate-shaped, and the inner ring fire cavity 331 is an annular cavity.

[0102] In this way, the middle ring fire cover 32 can form the outer ring wall of the inner ring combustion chamber 311. Moreover, the structure of the inner ring fire cover 33 can be simple and easy to manufacture.

[0103] The fire cover assembly 30 of the present invention is configured such that the inner ring fire cover 33 includes an annular cover body 334 and an inner ring inner ring wall 335 provided below the annular cover body 334, and the inner ring inner ring wall 335 extends into the middle ring hole 323 of the middle ring fire cover 32, so as to form the outer ring wall of the inner ring combustion chamber 331 with the help of the middle ring fire cover 32.

[0104] Moreover, by sealingly fitting the periphery of the annular cover body 334 with the periphery of the middle ring hole 323, not only can the leakage of gas in the inner ring combustion chamber 331 be prevented, but the upper end of the inner ring fire cover 33 and the upper end of the middle ring fire cover 32 can also be arranged adjacent to each other, that is, the upper end of the inner ring fire cover 33 and the upper end of the middle ring fire cover 32 are arranged close to the same plane, thereby avoiding the formation of a bulge on the upper surface of the burner 100, or the formation of a particularly protruding bulge.

[0105] Specifically, such as Figure 11-14 As shown, the inner ring fire hole 332 is provided on the annular cover 334. In this way, the design of the inner ring fire hole 32 can be facilitated.

[0106] Specifically, such as Figure 11-14 As shown, the annular hole of the inner ring inner ring wall 335 is arranged corresponding to the annular hole of the annular cover 334 to form the inner ring annular hole 333 .

[0107] Further, if Figure 11-14 As shown, the central ring fire cover 32 includes a central ring outer wall 324, a central ring top wall 325 provided on the inner surface of the central ring outer wall 324, and a central ring inner wall 326 provided on the inner edge of the central ring top wall 325. The central ring outer wall 324, the central ring top wall 325, and the central ring inner wall 326 together form a central ring combustion chamber 321. The central ring combustion hole 322 is provided in the central ring outer wall 324.

[0108] The periphery of the annular cover 334 is sealed and connected to the upper end of the middle ring outer ring wall 324, and the middle ring top wall 325 at least partially extends downwardly in a direction toward the ring center, so that the middle ring top wall (325) and the annular cover (334) are spaced apart. In this embodiment, the middle ring top wall 325 extends downwardly in a direction toward the ring center.

[0109] In this way, by making the middle ring top wall 325 at least partially extend downward in the direction toward the center of the ring, the middle ring top wall 325 can be spaced apart from the annular cover body 334 to increase the size of the inner ring combustion chamber 331 and enhance the firepower of the inner ring fire.

[0110] Moreover, by sealingly fitting the periphery of the annular cover body 334 with the upper end of the middle ring outer ring wall 324, and sealingly fitting the periphery of the annular cover body 334 with the periphery of the middle ring hole 323, the sealing fitting connection structure can be simplified, thereby reducing the design difficulty and reducing production costs.

[0111] Further, if Figure 11-14 As shown, the upper end of the middle ring outer ring wall 324 protrudes upward from the middle ring top wall 325. In this way, the inner ring combustion chamber 331 can be further enlarged.

[0112] Specifically, the annular hole corresponding to the portion of the middle ring outer ring wall 324 protruding from the middle ring top wall 325, the annular hole of the middle ring top wall 325 and the annular hole of the middle ring inner ring wall 326 are jointly used to form the middle ring annular hole 323. The hole wall surface of the middle ring annular hole 323 and the lower surface of the annular cover plate and the annular wall surface of the inner ring inner ring wall 335 are jointly used to enclose to form the inner ring combustion chamber 331.

[0113] Furthermore, if Figure 11-14 As shown, the lower surface of the periphery of the annular cover 334 is provided with an annular receiving groove 3341, and the upper end of the middle ring outer wall 324 is disposed in the annular receiving groove 3341. This not only allows the annular cover 334 and the middle ring outer wall 324 to be positioned and installed, but also facilitates and improves the sealing connection between the annular cover 334 and the middle ring outer wall 324.

[0114] Furthermore, if Figure 11-14 As shown, the portion of the middle ring outer ring wall 324 protruding from the middle ring top wall 325 is provided with an ignition hole 3241 communicating with the inner ring combustion cavity 331 .

[0115] Specifically, such as Figure 4 As shown, the burner 100 further includes a flameout protection needle 40 , the sensing end of the flameout protection needle 40 is arranged corresponding to the ignition hole 3241 , and the flameout protection needle 40 is used to detect whether the inner ring gas cavity is extinguished.

[0116] Specifically, a plurality of ignition holes 3241 are provided to improve detection accuracy.

[0117] Furthermore, if Figure 11-14 As shown, at least a portion of the annular cover 334 extends downwardly and obliquely toward the center of the ring. This facilitates directing overflow debris such as oil droplets and water into the inner annular hole 333, thereby facilitating discharge of the oil droplets, water, and other debris from the secondary air passage 24.

[0118] Optionally, the bottom wall of the inner transverse air passage 243 is tilted downward in the radially outward direction, and / or the annular partition plate 25 is tilted downward in the radially outward direction, and / or the bottom wall of the outer transverse air passage 244 is tilted downward in the radially outward direction. This facilitates the discharge of debris such as oil droplets and water.

[0119] Specifically, the annular cover body 334 includes an annular connecting portion 3342 and an annular inclined portion 3343 arranged on the inner edge of the annular connecting portion 3342, the annular receiving groove 3341 is arranged on the lower surface of the outer periphery of the annular connecting portion 3342, and the annular inclined portion 3343 extends downwardly in the direction toward the center of the ring.

[0120] Specifically, an annular protrusion 3344 is provided on the edge of the upper surface of the annular connecting portion 3342, and the inner side surface of the annular protrusion 3344 extends downwardly in the direction toward the center of the ring; in this way, it is easy to prevent oil droplets, water and other debris from leaking from the periphery of the annular cover body 334.

[0121] Specifically, the downward inclination angle of the annular inclined portion 3343 is smaller than the downward inclination angle of the middle ring top wall 325 .

[0122] Furthermore, if Figure 11-14 As shown, the upper surface of the annular cover 334 is provided with an annular protrusion 3345, and the air outlet of the inner ring fire hole 332 is provided on the annular protrusion 3345. This can not only increase the air outlet height of the inner ring fire, but also prevent the soup and other debris that overflows onto the upper surface of the annular cover from clogging the inner ring fire hole 332.

[0123] Specifically, the annular protrusion 3345 is arranged outside the annular hole of the annular cover 334 .

[0124] Specifically, the annular protrusion 3345 is provided on the upper surface of the annular inclined portion 3343 .

[0125] Specifically, the air outlet of the inner ring fire hole 332 is located on the top surface of the annular protrusion 3345. This can further prevent blockage. Of course, the air outlet of the inner ring fire hole 332 can also be located on the inner or outer surface of the annular protrusion 3345.

[0126] Specifically, such as Figure 11-14 As shown, the inner ring fire holes 332 are arranged upwardly and tilted in the direction toward the ring center. In this way, the inner ring fire can be concentrated toward the center.

[0127] Specifically, a plurality of inner ring combustion holes 332 are spaced apart and distributed in the circumferential direction of the inner ring combustion cavity 331 .

[0128] Furthermore, if Figure 11-14 As shown, the annular protrusion 3345 is arranged close to the inner ring hole 333 so that the inner ring fire is arranged in the middle of the burner.

[0129] Furthermore, if Figure 11-14 As shown, the inner surface of the annular protrusion 3345 is tilted downward toward the center of the ring; and / or the outer surface of the annular protrusion 3345 is tilted downward away from the center of the ring. This not only facilitates the flow of debris that splashes onto the annular protrusion 3345 but also facilitates demolding, reducing production difficulties.

[0130] Furthermore, if Figure 11-14As shown, the annular protrusion 3345 is provided with a guide notch 3346. This allows oil droplets, water, and other debris directed to the annular protrusion 3345 to flow through the guide notch 3346 into the inner ring hole 333, preventing them from accumulating outside the annular protrusion 3345 and overflowing the inner ring combustion hole 332. Furthermore, by positioning the air outlet of the inner ring combustion hole 332 on the top surface or inner surface of the annular protrusion 3345, overflow debris such as oil droplets and water can be prevented from flowing into or clogging the inner ring combustion hole 332.

[0131] Furthermore, if Figure 11-14 As shown, the middle ring fire hole 322 includes a first fire hole 3221, and the gas outlet of the first fire hole 3221 is provided on the outer ring surface of the middle ring outer ring wall 324. Specifically, a plurality of first fire holes 3221 are provided on the circumference of the middle ring outer ring wall 324 and arranged in a circle.

[0132] Furthermore, if Figure 11-14 As shown, the outer surface of the middle ring outer ring wall 324 is provided with an annular flame stabilizing groove 3242, which is provided below the air outlet of the first combustion hole 3221. The middle ring combustion hole 322 also includes a second combustion hole 3222, the air outlet of the second combustion hole 3222 being provided on the lower groove wall of the annular flame stabilizing groove 3242. Specifically, a plurality of second combustion holes 3222 are provided in the circumferential direction of the middle ring outer ring wall 324.

[0133] Furthermore, if Figure 11-14 As shown, the annular flame stabilizing groove 3242 intersects with the first combustion hole 3221 to form a gas connection port 3223 .

[0134] In a further embodiment of the present invention, based on the structure of the above fire cover assembly 30, the structure of the fire cover assembly is further designed to prevent the inner ring fire cover from loosening during use, which is described in detail below.

[0135] Furthermore, if Figure 1-5 As shown, an anti-slip structure is provided between the inner ring fire cover 33 and the middle ring fire cover 32 .

[0136] Moreover, by setting an anti-detachment structure between the inner ring fire cover 33 and the middle ring fire cover 32 to limit the inner ring fire cover 33 and the middle ring fire cover 32 to each other, the inner ring fire cover 33 can be prevented from loosening during the use of the burner 100, thereby preventing the inner ring fire cover 33 from detaching from the middle ring fire cover 32, thereby improving the user experience.

[0137] Furthermore, if Figure 1-5 As shown, the anti-slip structure is provided between the lower surface of the annular cover body 334 and the middle ring fire cover 32. In this way, it is convenient to design the anti-slip structure and reduce the space required for the design.

[0138] Furthermore, as shown in the figure, the anti-slip structure is provided on the lower surface of the annular cover body 334 and the upper surface of the middle ring top wall 325. In this way, the anti-slip structure can be further provided based on the specific structure of the fire cover assembly.

[0139] Furthermore, if Figure 2-5 As shown in , 11-14, and 18-20, the anti-slip structure is a snap-fit ​​structure. This makes installation easier.

[0140] Furthermore, if Figure 11-14 , and 18-20, the anti-slip structure includes a plurality of first hooks 336 protruding from the lower surface of the annular cover 334 and distributed along the circumferential direction, a plurality of second hooks 327 protruding from the upper surface of the middle ring top wall 325 and distributed along the circumferential direction, and an anti-slip ring (not shown), the adjacent first hooks 336 and second hooks 327 are staggered, the first hooks 336 and the second hooks 327 are both engaged with the anti-slip ring, and the hooking directions of the first hook 336 and the second hook 327 are opposite. Wherein, the hooking direction refers to the direction in which the anti-slip ring blocks the hook from moving. In the present invention, the hooking direction of the first hook 336 is mainly upward, and the hooking direction of the second hook 327 is mainly downward.

[0141] In this way, the annular cover body 334 and the middle ring top wall 325 can be connected together with the help of the anti-slip ring, thereby achieving an anti-slip effect on the inner ring fire cover 33.

[0142] Furthermore, the adjacent first hooks 336 and second hooks 327 are staggered to avoid interference between the first hooks 336 and the second hooks 327 , thereby reducing installation difficulty.

[0143] Furthermore, if Figure 18-20 As shown, the first hook 336 includes a first supporting protrusion 3361 protruding from the lower surface of the annular cover 334, and a first locking protrusion 3362 provided on the side of the first supporting protrusion 3361 facing the anti-slip ring. The anti-slip ring is engaged with the side of the first locking protrusion 3362 facing the lower surface of the annular cover 334. In this way, the hooking direction of the first hook 336 is mainly downward.

[0144] like Figure 11-14 As shown, the second hook 327 includes a second supporting protrusion 3271 protruding from the upper surface of the middle ring top wall 325, and a second locking protrusion 3272 provided on the side of the second supporting protrusion 3271 facing the anti-slip ring. The anti-slip ring is engaged with the side of the second locking protrusion 3272 facing the upper surface of the middle ring top wall 325. In this way, the hooking direction of the first hook 336 can be mainly upward.

[0145] Furthermore, if Figure 18-20 As shown, the first hook 336 also includes a limiting protrusion 3363 provided on the side of the first supporting protrusion 3361 facing the anti-slip ring, and the limiting protrusion 3363 is spaced apart from the first positioning protrusion 3362 to form a positioning groove 3364 between the limiting protrusion 3363 and the first positioning protrusion 3362, and the anti-slip ring is engaged with the positioning groove 3364.

[0146] Thus, during assembly, the anti-slip ring can be first installed in the positioning groove 3364 of the inner ring fire cover 33, and then installed together with the middle ring fire cover 32. In this way, when the anti-slip ring and the inner ring fire cover 33 are installed together with the middle ring fire cover 32, the anti-slip ring is engaged in the positioning groove 3364, which can be used to initially limit the anti-slip ring, thereby reducing the difficulty of installation.

[0147] In this embodiment, the limiting protrusion 3363 connects the lower surface of the annular cover 334 and the side surface of the first supporting protrusion 3361 facing the anti-slip ring to improve the structural strength of the first hook 336 .

[0148] Of course, the anti-slip ring can also be fixed on the inner fire cover or the middle ring fire cover 32 through other structures. For example, the limiting protrusion 3363 can be set on the second support protrusion 3271 to form a locking groove 3364 between the limiting protrusion 3363 and the second locking protrusion 3272; and so on. There is no need to elaborate on them one by one here.

[0149] Specifically, the number of the first hooks 336 is greater than or equal to 2 and less than or equal to 10, such as 3, 4, 5, 6, 7, 8, etc.

[0150] Specifically, the number of the second hooks 327 is greater than or equal to 2 and less than or equal to 10, such as 3, 4, 5, 6, 7, 8, etc.

[0151] Specifically, the anti-slip ring is a high temperature resistant part to prevent deformation at high temperatures. Optionally, the anti-slip ring is a metal part, such as a steel ring.

[0152] Furthermore, if Figure 11-14 As shown in Figures 18-20, the number of the first hooks 336 is greater than the number of the second hooks 327. In this way, the connection strength can be guaranteed and the installation difficulty can be reduced.

[0153] Of course, in other embodiments, the anti-slip structure can also be set to other structural forms. For example, in some embodiments, the anti-slip structure can include a plurality of first anti-slip parts protruding from the lower surface of the annular cover body 334 and distributed along the circumferential direction, and a plurality of second anti-slip parts protruding from the upper surface of the middle ring top wall 325 and distributed along the circumferential direction. The plurality of first anti-slip parts and the plurality of second anti-slip parts are arranged in a one-to-one correspondence. The side of the first anti-slip part facing the second anti-slip part and the side of the second anti-slip part facing the first anti-slip part, one of which is provided with a limiting rotary groove extending in the circumferential direction, and the other is provided with a limiting rotary convex, the limiting rotary convex being clamped in the limiting rotary groove, so that the first anti-slip part and the second anti-slip part are engaged with each other during installation. The anti-slip parts are staggered, and then the inner ring fire cover 33 is rotated so that the limiting rotary protrusion is rotated into the limiting rotary groove; for example, in another part of the embodiments, the anti-slip structure can include a plurality of undercuts convexly provided on the lower surface of the annular cover body 334 and distributed along the circumferential direction, and a plurality of card grooves provided on the upper surface of the middle ring top wall 325 and distributed along the circumferential direction, a plurality of first undercuts and a plurality of card grooves are provided in a one-to-one correspondence, and the undercuts are engaged in the card grooves; for example, the anti-slip structure can be set as a screw locking structure, such as a first connecting hole is provided on the annular cover body 334, and a second connecting hole is provided on the middle ring top wall 325, and the screw passes through the first connecting hole and is threadedly connected to the second connecting hole; and so on.

[0154] Of course, in other embodiments, the anti-slip structure may also be provided at other locations, such as between the upper end of the middle ring outer ring wall 324 and the periphery of the annular cover 334 , etc.

[0155] The structure of the furnace head assembly 10 will be described below.

[0156] In one embodiment, if Figure 1-8 As shown, the burner head assembly 10 includes a burner head 11 and a detachable ejector tube 18. The burner head 11 has a universal air inlet channel and a central through hole 135. The detachable ejector tube 18 is installed at the bottom of the burner head 11. The detachable ejector tube 18 is connected to the central through hole 135 to form a central air inlet channel 1c.

[0157] Further, if Figure 1-8 As shown, the burner head 11 includes a first ejector pipe joint 12, and an inner ring annular portion 13 having an inner ring air intake ring groove 134 and a central through hole 135. The bottom portion of the inner ring annular portion 13 protrudes downward to form an inner ring semi-ring air intake bulge 131. The first ejector pipe joint 12 is connected to the outer side surface of the inner ring semi-ring air intake bulge 131. The bottom of the inner ring annular portion 13 is provided with a detachable mounting position located on one side of the inner ring semi-ring air intake bulge 131. The detachable ejector pipe 18 is detachably connected to the detachable mounting position so that the detachable ejector pipe 18 is connected to the central through hole 135.

[0158] Specifically, the central air intake channel 1c includes a pipe of a detachable ejector pipe 18 and a central through hole 135 , and the middle ring air intake channel 1b includes a pipe of a first ejector pipe joint 12 and an inner ring air intake groove 134 .

[0159] Further, if Figure 1-8 As shown, the detachable ejector tube 18 includes a vertical mounting portion 181 and a transverse air inlet portion 182 provided at the lower end of the vertical mounting portion 181. The vertical mounting portion 181 is removably mounted to the bottom of the inner annular portion 13, and the transverse extension portion extends from one side of the inner semi-annular air inlet protrusion 131 away from the inner annular portion 13. The transverse air inlet portion 182 has a gas inlet, through which gas can enter the detachable ejector tube 18.

[0160] Further, if Figure 1-8 As shown, a plurality of mounting protrusions 132 are provided at the bottom of the inner ring portion 13 , and the plurality of mounting protrusions 132 are distributed at intervals along the circumference of the central through hole 135 ; the detachable mounting position includes a mounting hole 1321 provided on the mounting protrusion 132 .

[0161] like Figure 1-8 As shown, the detachable ejector tube 18 includes a plurality of connecting lugs 183, and the plurality of connecting lugs 183 are arranged in a one-to-one correspondence with the plurality of mounting protrusions 132. A connecting hole 1831 is provided on the connecting lug 183, and the connecting hole 1831 is connected to the mounting hole 1321 by a screw so that the detachable ejector tube 18 can be detachably connected to the detachable mounting position.

[0162] Specifically, such as Figure 1-8 As shown, a plurality of connecting lugs 183 are provided at the upper end of the circumferential surface of the vertical mounting portion 181 and are distributed at intervals along the circumferential direction.

[0163] Specifically, the number of the mounting protrusions 132 is greater than or equal to 2 and less than or equal to 5, such as 2 or 3.

[0164] Specifically, an extended annular protrusion 133 is provided at the bottom of the inner annular portion 13 and around the central through hole 135 .

[0165] Further, if Figure 1-8 As shown, the furnace head 11 also includes a second ejector pipe joint 16, an inner and outer connecting portion 14, and an outer ring portion 15 having an outer ring air intake ring groove 151. The inner ring portion 13 is arranged on the inner side of the outer ring portion 15, and the inner and outer connecting portion 14 connects the inner ring portion 13 and the outer ring portion 15.

[0166] Optionally, there are multiple internal and external connecting parts 14.

[0167] Specifically, such as Figure 1-8 As shown, one of the inner and outer connecting portions 14 is further connected to one of the mounting protrusions 132 .

[0168] Specifically, such as Figure 1-8 As shown, the bottom portion of the outer ring portion 15 protrudes downward to form an outer ring semi-ring air inlet convex portion 152, and the second ejector pipe joint 16 is connected to the outer ring semi-ring air inlet convex portion 152, and the extension direction of the second ejector pipe joint 16 is the same as the extension direction of the first ejector pipe joint 12.

[0169] Specifically, the outer ring air inlet channel 1 a includes a pipe of the second ejector pipe joint 16 and an outer ring air inlet ring groove 151 .

[0170] Specifically, the first ejector pipe joint 12 is connected to the first universal ejector pipe 50 , and the second ejector pipe joint 16 is connected to the second universal ejector pipe 60 .

[0171] The present invention also provides a gas stove, which includes a burner. The specific structure of the burner refers to the above-mentioned embodiment. Since the gas stove of the present invention adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0172] The above descriptions are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present description and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A gas distribution plate, characterized in that: The gas distribution plate has: At least two annular gas passages spaced apart from each other in the radial direction from the inside to the outside; and a secondary air passage, the secondary air passage comprising a central air passage located inside the innermost annular gas passage, and a concealed air passage passing through at least one of the annular gas passages to connect external air with the central air passage; There are three annular gas channels, namely an outer ring gas channel, a middle ring gas channel and an inner ring gas channel, and the central air channel is provided on the inner side of the inner ring gas channel; The inner ring wall of the outer ring gas channel is spaced apart from the outer ring wall of the middle ring gas channel; The concealed air passage includes a spacing air passage located between the inner ring wall of the outer ring gas passage and the outer ring wall of the middle ring gas passage and communicating with the outside air, and an inner transverse air passage sequentially passing through the middle ring gas passage and the inner ring gas passage and communicating with the spacing air passage and the central air passage; The concealed air passage also includes an outer transverse air passage that passes through the outer ring gas passage and connects the spaced air passage with the outside air; The inner ring wall of the middle ring gas channel and the outer ring wall of the inner ring gas channel are the same ring wall; The inner ring wall of the inner ring gas channel is used to form the side wall of the central air channel.

2. The gas distribution plate according to claim 1, characterized in that A plurality of outer transverse air passages are distributed at intervals in the circumferential direction of the outer ring gas passage.

3. The gas distribution plate according to claim 2, characterized in that: One of the outer transverse air channels is arranged corresponding to the inner transverse air channel.

4. The gas distribution plate according to claim 1, characterized in that: The inner transverse air passage is arranged to be gradually expanded in the radial outward direction, and / or the outer transverse air passage is arranged to be gradually expanded in the radial outward direction.

5. The gas distribution plate according to claim 1, characterized in that: The circumferential width of the inner transverse air passage is gradually increased in the radially outward direction, so that the inner transverse air passage is gradually expanded in the radially outward direction; and / or, The circumferential width of the outer transverse air channel is gradually increased in the radial outward direction, so that the outer transverse air channel is gradually expanded in the radial outward direction.

6. The gas distribution plate according to any one of claims 1 to 5, characterized in that: The gas distribution plate includes an annular partition plate arranged between the inner ring wall of the outer ring gas channel and the outer ring wall of the middle ring gas channel, and connecting the inner ring wall of the outer ring gas channel and the outer ring wall of the middle ring gas channel. The spacing air channel is formed on the upper side of the annular partition plate.

7. The gas distribution plate according to claim 6, characterized in that: The outer periphery of the annular partition plate is connected to the lower channel wall of the outer transverse air channel, and / or the inner periphery of the annular partition plate is connected to the lower channel wall of the inner transverse air channel.

8. The gas distribution plate according to any one of claims 1 to 5, characterized in that: The lower end of the outer ring wall of the innermost annular gas channel protrudes downward from the ring walls of other annular gas channels to form a guide installation structure when assembled with the burner head assembly.

9. A burner, characterized in that: Comprising the gas distribution plate according to any one of claims 1 to 8.

10. A gas stove, characterized in that: Comprising the burner of claim 9.

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