CN213066105U - Inner ring fire cover, combustor and gas-cooker - Google Patents

Abstract

The utility model discloses an inner ring fire cover, a burner and a gas stove, wherein the inner ring fire cover is provided with an inner ring fire hole; the upper surface of the inner ring fire cover is convexly provided with an annular bulge, and the gas outlet of the inner ring fire hole is arranged on the annular bulge. Therefore, the inner ring fire hole of the inner ring fire cover can be prevented from being blocked by oil drops, water and other overflow impurities overflowing to the upper surface of the inner ring fire cover.

Description

Inner ring fire cover, combustor and gas-cooker

Technical Field

The utility model relates to a cooking utensils technical field, in particular to inner ring fire lid, combustor and gas-cooker.

Background

At present, a burner generally has an inner ring fire cover (also called a central fire cover) located at the center of the burner, and the top surface of the inner ring fire cover is provided with fire holes so as to realize top surface fire outlet.

However, to the structure of above inner ring fire lid, in the combustor use, when meetting the circumstances such as excessive pot, the hot water of overflow splashes down the top surface of inner ring fire lid easily to make top surface flame extinguish easily, there is serious potential safety hazard, and fires the hole and easily be blockked up, need often clear up, cause inconvenience for the user.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an inner ring fire lid aims at solving the technical problem that the hole of firing of current inner ring fire lid is easily by the hot water shutoff of overflow.

In order to achieve the purpose, the utility model provides an inner ring fire cover which is used for a burner and is provided with an inner ring fire hole;

the upper surface of the inner ring fire cover is convexly provided with an annular bulge, and the gas outlet of the inner ring fire hole is arranged on the annular bulge.

Optionally, the inner ring fire cover further has an inner ring annular hole, and the annular protrusion is disposed outside the inner ring annular hole.

Optionally, a flow guide structure for communicating the inner space and the outer space of the annular protrusion is arranged on the annular protrusion.

Optionally, the flow guiding structure is a flow guiding notch.

Optionally, the upper surface of the inner ring fire cover extends at least partially in a direction towards the ring center, and is inclined downwards.

Optionally, the annular protrusion is arranged on a downward inclined section of the upper surface of the inner ring fire cover; and/or the presence of a gas in the gas,

the annular protrusion is arranged close to the inner annular ring hole.

Optionally, the gas outlet of the inner ring fire hole is arranged on the top surface of the annular protrusion; alternatively, the first and second electrodes may be,

and the gas outlet of the inner ring fire hole is arranged on the inner ring surface of the annular bulge.

Optionally, the inner ring fire hole is arranged in an upward inclined manner in the direction towards the ring center.

Optionally, the edge of the upper surface of the inner ring fire cover is provided with an annular projection 3344.

Optionally, the inner ring surface of the annular protrusion is inclined downwards in the direction towards the ring center; and/or the presence of a gas in the gas,

the outer ring surface of the annular bulge is arranged in a downward inclined mode in the direction far away from the ring center.

Optionally, the inner ring fire cover comprises an annular cover body and an inner ring inner annular wall, the inner ring inner annular wall is convexly arranged on the lower surface of the annular cover body, and the annular bulge is arranged on the annular cover body;

the inner ring fire cover is used for being installed in a middle ring hole of a middle ring fire cover of the combustor so as to enable the ring cover body, the inner ring wall and the middle ring fire cover to enclose and form an inner ring fire cavity communicated with the inner ring fire hole.

Optionally, the annular cover body extends at least partially in a direction towards the center of the ring and is inclined downwards, so that the upper surface of the inner fire cover extends at least partially in a direction towards the center of the ring and is inclined downwards.

The utility model also provides a combustor, include as above the gas distribution dish.

The utility model discloses still provide a gas-cooker, include as above the combustor.

The utility model discloses in, it is protruding to set up the annular through the upper surface at the inner ring fire lid, and make the gas outlet that the inner ring fires the fire hole locate the annular arch, can reduce the overflow and get into the downthehole risk of inner ring fire by the oil drop of the upper surface of inner ring fire lid, overflow debris such as water, thereby can avoid the inner ring fire to be watered out by the oil drop of the upper surface of overflow inner ring fire lid, overflow debris such as water, and can avoid the inner ring fire hole of inner ring fire lid to be blockked up by the oil drop of the upper surface of overflow inner ring fire lid 33, overflow debris such as water.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic view of a viewing angle in an embodiment of the burner of the present invention;

FIG. 2 is a schematic view of the combustor of FIG. 1 from another perspective;

FIG. 3 is a cross-sectional view of the centerline of the removable ejector tube of the burner of FIG. 1;

FIG. 4 is a partial schematic view of the upper middle portion of the burner of FIG. 3;

FIG. 5 is a cross-sectional view of a centerline of a first eductor joint of the burner of FIG. 1;

FIG. 6 is a cross-sectional view of the burner of FIG. 1 taken through the centerline of a first burner orifice;

FIG. 7 is a schematic view of the burner of FIG. 3;

FIG. 8 is a schematic cross-sectional view of the burner of FIG. 7;

FIG. 9 is a schematic view of the burner of FIG. 7 from another perspective;

FIG. 10 is a schematic structural view of the air distribution plate of FIG. 3;

FIG. 11 is a schematic cross-sectional view of the gas distribution plate of FIG. 10;

FIG. 12 is a schematic view of the fire cover of FIG. 3;

FIG. 13 is a schematic view of the middle fire cover of FIG. 12 from another perspective;

FIG. 14 is a cross-sectional view of the middle fire cover of FIG. 12;

FIG. 15 is a schematic cross-sectional view of the middle fire cover of FIG. 12 through a first fire hole;

FIG. 16 is a schematic view of the outer fire cover of FIG. 3;

FIG. 17 is a schematic structural view of the outer ring fire cover of FIG. 16 from another perspective;

FIG. 18 is a cross-sectional view of the outer fire cover of FIG. 16;

FIG. 19 is a schematic view of the inner fire cover of FIG. 3;

FIG. 20 is a schematic view of the inner fire cover of FIG. 19 from another perspective;

fig. 21 is a cross-sectional view of the middle fire cover of fig. 19.

The reference numbers illustrate:

100. a burner; 10. a burner assembly; 11. a furnace end; 1a, an outer ring air inlet channel; 1b, a middle ring air inlet channel; 1c, a central air inlet channel; 12. a first ejector pipe joint; 13. an inner annular ring portion; 131. an inner ring semi-ring air inlet convex part; 132. a mounting boss; 1321. mounting holes; 133. the extension ring is convex; 134. an inner ring air inlet ring groove; 135. a central through hole; 14. an inner and outer connecting portion; 15. an outer annular ring portion; 151. an outer ring air inlet ring groove; 152. an outer ring semi-ring air inlet convex part; 16. a second ejector pipe joint; 18. the ejector pipe can be disassembled; 181. a vertical mounting portion; 182. a lateral air intake portion; 183. a connecting lug; 1831. connecting holes; 20. a gas distribution plate; 21. an outer ring gas channel; 211. an inner annular wall of the outer annular gas channel; 22. a middle ring gas channel; 221. the outer ring wall of the middle ring gas channel; 222. the inner annular wall of the middle ring gas channel; 23. an inner ring gas channel; 231. an inner ring wall of the inner ring gas channel; 24. a secondary air passage; 241. a spaced air channel; 242. a central air passage; 243. an inner transverse air passage; 244. an outer transverse air passage; 25. an annular partition plate; 30. a fire cover assembly; 31. an outer ring fire cover; 311. an outer ring combustion chamber; 312. an outer ring fire hole; 32. a middle ring fire cover; 321. a middle ring combustion chamber; 322. the fire hole is burned in the middle ring; 3221. a first fire hole; 3222. a second flame hole; 3223. a vent communication port; 323. a middle ring hole; 324. the outer ring wall of the middle ring; 3241. a firing hole; 3242. an annular flame stabilizing groove; 325. a middle ring top wall; 326. an inner annular wall of the middle ring; 327. a second hook; 3271. a second supporting convex part; 3272. a second detent projection; 33. an inner ring fire cover; 331. an inner ring combustion chamber; 332. an inner ring fire hole; 333. an inner ring annular hole; 334. an annular cover body; 3341. an annular accommodating groove; 3342. an annular connecting portion; 3343. an annular inclined portion; 3344. an annular protrusion; 3345. an annular projection; 3346. a diversion gap; 335. an inner annular wall of the inner ring; 336. a first hook; 3361. a first support protrusion; 3362. a first detent projection; 3363. a limiting convex part; 3364. a clamping groove; 40. a flameout protection needle; 50. a first general ejector tube; 60. the second general ejector tube.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that if the embodiments of the present invention are described with reference to "first", "second", etc., the description of "first", "second", etc. is only for descriptive purposes and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied.

The utility model provides an inner ring fire lid, combustor and gas-cooker. The inner ring fire cover is used for the combustor.

In the embodiment of the present invention, as shown in fig. 1-6, the burner 100 includes a burner assembly 10, a gas distribution plate 20 and a fire cover assembly 30, the gas distribution plate 20 is disposed above the burner assembly 10, and the fire cover assembly 30 is disposed above the gas distribution plate 20.

Wherein, the burners can be divided into one-ring flame burners, two-ring flame burners, three-ring flame burners and more ring flame burners according to the number of rings of (ring) flames of the burners; hereinafter, the structure of the burner of the present invention will be described in detail mainly by taking a three-ring burner as an example.

Further, as shown in fig. 3, 9 and 10, the gas distribution plate 20 has at least two annular gas passages spaced from the inside to the outside in the radial direction.

Further, as shown in fig. 3, 9 and 10, the gas distribution plate 20 further has a secondary air passage including a central air passage located inside the innermost annular gas passage, and a blind air passage passing through at least one of the annular gas passages to communicate the outside air with the central air passage.

In this embodiment, there are three annular gas passages, which are respectively an outer annular gas passage 21, a middle annular gas passage 22 and an inner annular gas passage 23, and the central air passage 242 is disposed inside the inner annular gas passage 23.

Accordingly, as shown in fig. 2 to 8, the burner assembly 10 has at least two air inlet channels spaced from inside to outside along the radial direction, and is disposed corresponding to at least two annular gas channels one by one.

In this embodiment, the number of the intake passages is three, and the three intake passages are respectively an outer ring intake passage 1a, a middle ring intake passage 1b and a center intake passage 1c, wherein the outer ring intake passage 1a and the middle ring intake passage 1b are both annular passages, and the center intake passage 1c is a through hole.

The gas distribution disc 20 is installed above the burner assembly 10, the outer ring gas channel 21 is communicated with the outer ring gas inlet channel 1a, the middle ring gas channel 22 is communicated with the middle ring gas inlet channel 1b, and the inner ring gas channel 23 is communicated with the central gas inlet channel 1 c.

Accordingly, as shown in fig. 2-5 and 11-20, the fire lid assembly 30 includes at least two fire lids arranged in a one-to-one correspondence with at least two annular gas passages, respectively.

In this embodiment, the fire covers are three, and are respectively 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, and the outer ring fire cover 31, the middle ring fire cover 32 and the inner ring fire cover 33 are all ring-shaped members and all have ring holes, wherein the ring hole of the outer ring fire cover 31 is an outer ring hole, the ring hole of the middle ring fire cover 32 is a middle ring hole 323, and the ring hole of the inner ring fire cover 33 is an inner ring hole 333.

Specifically, as shown in fig. 2-5 and 11-20, the outer ring fire cover 31 is installed above the gas distribution plate 20, the outer ring fire cover 31 has an outer ring fire cavity 311 annularly arranged and an outer ring fire hole 312 communicated with the outer ring fire cavity 311, the outer ring fire cavity 311 is communicated with the outer ring gas channel 21, the gas entering the outer ring gas inlet channel 1a can sequentially pass through the outer ring gas channel 21 and the outer ring fire cavity 311 and then be ejected from the outer ring fire hole 312, and the outer ring fire is formed after combustion.

As shown in fig. 2-5 and 11-20, the middle ring fire cover 32 is installed above the gas distributor 20, the middle ring fire cover 32 has a middle ring fire cavity 321 annularly arranged and a middle ring fire hole 322 communicated with the middle ring fire cavity 321, the middle ring fire cavity 321 is communicated with the middle ring gas channel 22, the gas entering the middle ring gas inlet channel 1b can sequentially pass through the middle ring gas channel 22 and the middle ring fire cavity 321, and then is ejected from the middle ring fire hole 322 to form a middle ring fire after combustion.

For the inner ring fire cover 33, the inner ring fire cover 33 can be arranged above the gas distribution plate 20, the inner ring fire cover 33 is provided with an inner ring fire cavity 331 which is annularly arranged and an inner ring fire hole 332 communicated with the inner ring fire cavity 331, the inner ring fire cavity 331 is communicated with the inner ring gas channel 23, gas entering the central air inlet channel 1c can sequentially pass through the inner ring gas channel 23 and the inner ring fire cavity 331 and then is sprayed out from the inner ring fire hole 332, and inner ring fire is formed after combustion. Or, as shown in fig. 2-5 and 11-20, the inner ring fire cover 33 is installed in the middle ring hole of the middle ring fire cover 32, the inner ring fire cover 33 and the middle ring fire cover 32 are enclosed to form an inner ring fire cavity 331 arranged annularly and an inner ring fire hole 332 communicated with the inner ring fire cavity 331, the inner ring fire cavity 331 is communicated with the inner ring gas channel 23, the gas entering the central gas inlet channel 1c can sequentially pass through the inner ring gas channel 23 and the inner ring fire cavity 331, and then is ejected from the inner ring fire hole 332, and the inner ring fire is formed after combustion.

Wherein the inner annular ring hole 333 of the inner annular fire cover 33 is communicated with the central air passage 242. The external air can enter the central air channel 242 through the hidden air channel, then flows out from the outlet at the upper end of the inner ring hole 333 through the central air channel 242 and the inner ring hole 333, so as to supplement air for the inner ring fire and the middle ring fire, and thus supplement air for the combustion of the burner 100, so as to solve the problem that insufficient air supply is easy to occur in the use process of the three-ring fire burner 100 and the gas stove, and ensure that the gas flowing out from 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 combusted.

The utility model discloses in, through setting up secondary air passageway 24, can make the outside air can supply with the middle part of combustor 100 through hidden air passage and central air passage 242 to can be located the annular flame of inner circle to the combustor 100 during operation and supply with the air, so that guarantee that fuel fully burns, can solve combustor 100 and gas-cooker at the in-process that uses, the problem that air supply is not enough appears in the middle part easily.

It should be emphasized that the above three-ring fire burner structure is only an embodiment of the application of the inner ring fire cover of the present invention, which is used to illustrate the usage environment of the inner ring fire cover 33, but not used to limit the shrinkage of the present invention, for example, the inner ring fire cover 33 can also be used in a two-ring fire burner, and the fire cover assembly only includes an inner ring fire cover and an outer ring fire cover disposed outside the inner ring fire cover; as another example, the inner ring fire cover 33 may be used in a four-ring fire burner, and the fire cover assembly 30 includes four fire covers including the inner ring fire cover 33; and so on.

It should be emphasized that the above two structural forms of the inner ring fire cover 33 are only two application forms of the inner ring fire cover 33 of the present invention, but the present invention is not limited to the contraction, and the second form is mainly used as an example for the following description.

In one embodiment, as shown in fig. 2 to 5, the inner fire ring cover 33 has an inner fire ring hole 332, an annular protrusion 3345 is protruded on the upper surface of the inner fire ring cover 33, and the air outlet of the inner fire ring hole 332 is disposed on the annular protrusion 3345.

Thus, by arranging the annular protrusion 3345 on the upper surface of the inner ring fire cover 33 and arranging the air outlet of the inner ring fire hole 332 on the annular protrusion 3345, the risk that overflow sundries such as oil drops and water overflowing to the upper surface of the inner ring fire cover 33 enter the inner ring fire hole 332 can be reduced, overflow sundries such as oil drops and water overflowing to the upper surface of the inner ring fire cover 33 can be prevented from extinguishing the inner ring fire, and overflow sundries such as oil drops and water overflowing to the upper surface of the inner ring fire cover 33 can be prevented from blocking the inner ring fire hole 332 of the inner ring fire cover 33.

Further, as shown in fig. 2 to 5, the inner ring fire cover 33 further has an inner ring hole 333, and the annular protrusion 3345 is disposed outside the inner ring hole 333. Thus, by providing the inner annular ring 333, air can be conveniently supplied from the middle of the burner 100, and overflow impurities such as oil drops and water overflowing to the upper surface of the inner annular fire cover 33 can be discharged through the inner annular ring 333 when the overflow impurities are excessive.

Further, as shown in fig. 11 to 14, the air outlet of the inner ring fire hole 332 is formed on the top surface of the annular protrusion 3345. Thus, the blockage can be further prevented. Of course, the air outlets of the inner ring fire holes 332 may also be disposed on the inner or outer ring surface of the annular protrusion 3345.

Specifically, as shown in fig. 11-14, the inner ring flame holes 332 are inclined upward in the direction toward the center of the ring. In this way, the inner ring fire can be concentrated toward the middle of the burner.

Specifically, the inner ring fire holes 332 are distributed at intervals in the circumferential direction of the inner ring fire cavity 331.

Specifically, the inner ring fire holes 332 include a plurality of large fire holes and a plurality of small fire holes, and the large fire holes and the small fire holes are sequentially and alternately distributed. Thus, the flame stabilizing effect can be realized.

Further, as shown in fig. 11-14, the annular projection 3345 is positioned adjacent to the inner annular ring 333 such that the inner annular ring is positioned in the middle of the burner.

Further, as shown in fig. 2 to 5, a flow guiding structure is disposed on the annular protrusion 3345 to connect the inner space and the outer space of the annular protrusion 3345.

In this way, overflow impurities such as oil drops and water overflowing to the upper surface of the inner ring fire cover 33 can flow into the inner side of the annular protrusion 3345 from the flow guide structure, and then flow into the inner ring hole 333, so as to prevent the overflow impurities from accumulating outside the annular protrusion 3345 and submerging the inner ring fire hole 332. So that it is discharged from the secondary air passage.

Moreover, the air outlet of the inner ring fire hole 332 is arranged on the top surface or the inner ring surface of the annular protrusion 3345, so that overflow impurities such as oil drops and water can be further prevented from flowing into or blocking the inner ring fire hole 332.

Further, as shown in fig. 11-14, the flow guide structure is a flow guide notch (3346). Thus, the flow guide structure can be simplified. Of course, in other embodiments, the flow guiding structure may also be configured as a flow guiding through hole, and the like.

Further, as shown in fig. 11 to 14, the upper surface of the inner ring fire cover (33) extends at least partially in a direction toward the center of the ring, being inclined downward.

Thus, overflow impurities such as oil drops and water overflowing to the upper surface of the inner ring fire cover 33 can be conveniently guided into the inner ring annular hole 333 and then discharged from the secondary air channel.

Further, as shown in fig. 11 to 14, the annular projection 3345 is provided on a downwardly inclined section of the upper surface of the inner ring fire cover 33. Thus, overflow impurities such as oil drops and water overflowing to the upper surface of the inner ring fire cover 33 can be further conveniently guided into the inner ring hole 333. Moreover, the height of the outlet of the inner ring fire hole 332 can be prevented from being too high.

Further, as shown in fig. 11 to 14, the inner annular surface of the annular projection 3345 is inclined downward in a direction toward the center of the ring; and/or the outer annular surface of the annular protrusion 3345 is inclined downwards in the direction away from the center of the ring. So, on the one hand can be convenient for guide splash to annular protrusion 3345 on the overflow debris flow down, on the other hand still is convenient for the drawing of patterns to reduce the production degree of difficulty.

Further, as shown in fig. 11-14, the edge/periphery of the upper surface of the inner fire lid 33 is provided with an annular projection 3344. Specifically, the inner side surface/inner annular surface of the annular projection 3344 extends obliquely downward in a direction toward the center of the ring.

Thus, overflow impurities such as oil drops and water can be prevented from overflowing from the edge of the upper surface of the inner ring fire cover 33.

Further, as shown in fig. 2-5 and 11-14, the middle ring fire cover 32 has a middle ring hole 323, a middle ring fire chamber 321 with an open lower end, and a middle ring fire hole 322 communicated with the middle ring fire chamber 321. The middle ring hole 323 is a through hole, and the middle ring burning cavity 321 is a ring cavity.

The inner ring fire cover 33 is mounted to the middle ring fire cover 32.

Specifically, the inner ring fire cover 33 is installed in the middle ring hole 323, an inner ring fire cavity 331 is formed by enclosing the inner ring fire cover 33 and the middle ring fire cover 32, and the inner ring fire hole 332 is communicated with the inner ring fire cavity 331.

Thus, by installing the inner ring fire cover 33 in the middle ring hole 323, the inner ring fire cavity 331 is formed by the inner ring fire cover 33 and the middle ring fire cover 32, that is, the outer ring wall of the inner ring fire cavity 331 is formed by the middle ring fire cover 32, which is favorable for reducing the radial size of the burner 100 on one hand, and is favorable for increasing the inner ring fire cavity 331 on the other hand, so that the inner ring fire cavity 331 can be increased on the basis of realizing the miniaturization design of the burner 100 and the gas stove.

Further, as shown in fig. 11 to 14, the inner ring fire cover 33 includes an annular cover body 334 and an inner ring inner annular wall 335, the inner ring inner annular wall 335 is disposed on the lower surface of the annular cover body 334, and the annular protrusion 3345 is disposed on the upper surface of the annular cover body 334. Wherein, the annular cover 334 is or is substantially annular plate-shaped. Wherein, it can be understood that the upper surface of the annular cover plate 334 is the upper surface of the inner ring fire cover 33.

The inner ring fire cover 33 is configured to be mounted on the middle ring fire cover 32, so that the annular cover body 334, the inner ring inner annular wall 335 and the middle ring fire cover 32 (among them) are enclosed to form a combustion chamber 331 with the inner ring.

Specifically, as shown in fig. 11-14, the periphery of the annular cover 334 is connected to the periphery of the middle ring annular hole 323 in a sealing fit manner, and the inner annular wall 335 of the inner ring is disposed in the middle ring annular hole 323, so as to form an inner ring fire chamber 331 enclosed between the inner ring fire cover 33 and the middle ring fire cover 32.

Thus, the inner ring fire cover 33 is simple in structure and convenient to manufacture. Moreover, by connecting the periphery of the annular cover 334 with the periphery of the middle ring hole 323 in a sealing fit manner, not only can the gas leakage in the inner ring fire chamber 331 be prevented, but also the upper end of the inner ring fire cover 33 can be arranged adjacent to the upper end of the middle ring fire cover 32, i.e. the upper end of the inner ring fire cover 33 and the upper end of the middle ring fire cover 32 are both arranged close to the same plane, so that the formation of a bulge or a particularly convex bulge on the upper surface of the burner 100 can be avoided.

Specifically, as shown in fig. 11 to 14, the annular hole of the inner annular wall 335 of the inner ring is disposed corresponding to the annular hole of the annular cover 334 to form the inner annular hole 333.

Specifically, as shown in fig. 11-14, the air inlets of the inner ring fire holes 332 are disposed on the annular cover 334.

Specifically, as shown in fig. 11-14, the annular projection 3344 is provided on the upper surface of the annular cover plate 334.

Specifically, as shown in FIGS. 11-14, the annular cover 334 extends at least partially downward in a direction toward the center of the ring, such that the upper surface of the inner ring fire cover 33 extends at least partially downward in a direction toward the center of the ring.

Specifically, as shown in fig. 11 to 14, the annular cover 334 includes an annular connecting portion 3342 and an annular inclined portion 3343 provided at an inner edge of the annular connecting portion 3342, and the annular inclined portion 3343 extends obliquely downward in a direction toward the center of the ring. Wherein the annular protrusion 3345 is formed on the upper surface of the annular inclined portion 3343, and the annular protrusion 3344 is formed on the edge of the upper surface of the annular connecting portion 3342.

Further, as shown in fig. 11-14, the middle ring fire cover 32 includes a middle ring outer-ring wall 324, a middle ring top wall 325 disposed on the inner ring surface of the middle ring outer-ring wall 324, and a middle ring inner-ring wall 326 disposed on the inner edge of the middle ring top wall 325, wherein the middle ring outer-ring wall 324, the middle ring top wall 325, and the middle ring inner-ring wall 326 surround to form the middle ring fire cavity 321. Wherein, the middle ring fire hole 322 is disposed on the middle ring outer ring wall 324.

The periphery of the annular cover 334 is connected with the upper end of the middle ring outer ring wall 324 in a sealing fit manner, and the middle ring top wall 325 at least partially extends downwards in the direction towards the ring center, so that the middle ring top wall (325) and the annular cover (334) are arranged at intervals. In this embodiment, the middle ring top wall 325 extends obliquely downward in a direction toward the center of the ring.

In this manner, by having the middle ring top wall 325 extend at least partially obliquely downward in the direction toward the ring center, the middle ring top wall 325 and the ring-shaped cover 334 can be disposed at a distance so as to enlarge the inner ring fire chamber 331 so as to enhance the fire power of the inner ring fire.

Specifically, the annular inclined portion 3343 is inclined downward at an angle smaller than that of the middle ring top wall 325.

Further, as shown in fig. 11-14, the upper end of the middle ring outer annular wall 324 protrudes upward from the middle ring top wall 325. In this way, the inner ring fire chamber 331 can be further enlarged.

Further, as shown in fig. 11-14, 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 annular wall 324 is disposed in the annular receiving groove 3341. Thus, the positioning and installation between the annular cover body 334 and the middle ring outer ring wall 324 can be realized, and the sealing matching connection between the annular cover body 334 and the middle ring outer ring wall 324 can be conveniently realized and improved.

Specifically, as shown in fig. 11 to 14, the annular receiving groove 3341 is formed on a lower surface of an outer peripheral edge of the annular connecting portion 3342.

Further, as shown in fig. 11 to 14, the portion of the middle ring outer annular wall 324 protruding out of the middle ring top wall 325 is provided with a firing hole 3241 communicating with the inner ring firing chamber 331.

Specifically, as shown in fig. 4, the burner 100 further includes a flameout protection needle 40, a sensing end of the flameout protection needle 40 is disposed corresponding to the ignition hole 3241, and the flameout protection needle 40 is used for detecting whether the inner ring gas cavity is flameout.

Specifically, the ignition holes 3241 are provided in plural to improve detection accuracy.

Further, as shown in fig. 11-14, the middle ring fire holes 322 include first fire holes 3221, and air outlets of the first fire holes 3221 are disposed on an outer annular surface of the middle ring outer annular wall 324. Specifically, the first fire holes 3221 are arranged in a plurality in the circumferential direction of the middle ring outer annular wall 324, and are arranged in a circle.

Further, as shown in fig. 11 to 14, an annular flame holding groove 3242 is disposed on an outer annular surface of the middle ring outer annular wall 324, the annular flame holding groove 3242 is disposed below an air outlet of the first flame holding hole 3221, the middle ring flame holding hole 322 further includes a second flame holding hole 3222, and an air outlet of the second flame holding hole 3222 is disposed on a lower side groove wall of the annular flame holding groove 3242. Specifically, the second flame holes 3222 are provided in plurality in the circumferential direction of the middle ring outer annular wall 324.

Further, as shown in fig. 11-14, the annular flame holding groove 3242 intersects the first firing hole 3221 to form a gas communication port 3223.

In a further embodiment of the present invention, on the basis of the structure of the upper 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 will be described in detail below.

Further, as shown in fig. 1 to 5, an anti-dropping structure is provided between the inner ring fire cover 33 and the middle ring fire cover 32.

Therefore, the anti-disengaging structure is arranged 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 mutually, so that the inner ring fire cover 33 can be prevented from loosening in the use process of the burner 100, the inner ring fire cover 33 can be prevented from disengaging from the middle ring fire cover 32, and the user experience is improved.

Further, as shown in fig. 1 to 5, the anti-dropping structure is disposed between the lower surface of the annular cover 334 and the middle fire cover 32. So, can be convenient for design anti-disengaging structure, reduce the required space of design.

Further, as shown, the anti-slip structure is disposed on the lower surface of the annular cover 334 and the upper surface of the middle ring top wall 325. Thus, the anti-dropping structure can be further arranged based on the specific structure of the fire lid assembly.

Further, as shown in fig. 2-5, 11-14, and 18-20, the anti-separation structure is a snap structure. Thus, installation can be facilitated.

Further, as shown in fig. 11-14 and 18-20, the anti-releasing 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-releasing ring (not shown), the adjacent first hooks 336 and second hooks 327 are disposed in a staggered manner, the first hooks 336 and second hooks 327 are both fastened to the anti-releasing ring, and the fastening directions of the first hooks 336 and second hooks 327 are opposite. Wherein, the hookup direction is that the anticreep circle blocks the direction of trip motion the utility model discloses in, the hookup direction of first trip 336 mainly is upwards, the direction of colluding of second trip 327 is mainly downwards.

In this way, the annular cover 334 can be connected to the middle ring top wall 325 by the anti-slip ring, so that the anti-slip effect of the inner ring fire cover 33 can be achieved.

Moreover, the adjacent first hook 336 and the second hook 327 are arranged in a staggered manner, so that the interference between the first hook 336 and the second hook 327 can be avoided, and the installation difficulty can be reduced.

Further, as shown in fig. 18 to 20, 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 disposed on a side surface of the first supporting protrusion 3361 facing the anti-slip ring, and the anti-slip ring is locked to the side surface of the first locking protrusion 3362 facing the lower surface of the annular cover 334. Thus, the hooking direction of the first hook 336 is mainly downward.

As shown in fig. 11 to 14, 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 disposed on a side surface of the second supporting protrusion 3271 facing the anti-slip ring, and the anti-slip ring is locked to a side of the second locking protrusion 3272 facing the upper surface of the middle ring top wall 325. Thus, the hooking direction of the first hook 336 is mainly upward.

Further, as shown in fig. 18 to 20, the first hook 336 further includes a limiting protrusion 3363 disposed on a side surface of the first supporting protrusion 3361 facing the anti-slip ring, the limiting protrusion 3363 and the first locking protrusion 3362 are disposed at an interval, so that a locking groove 3364 is formed between the limiting protrusion 3363 and the first locking protrusion 3362, and the anti-slip ring is locked in the locking groove 3364.

Thus, during assembly, the retainer ring can be first installed in the retaining groove 3364 of the inner ring fire cover 33 and then installed in the middle ring fire cover 32. Like this, when covering the anticreep circle and the inner ring fire and installing in well fire lid 32 together, because anticreep circle joint in screens groove 3364, can carry out preliminary spacing to the anticreep circle to reduce the installation degree of difficulty.

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, so as to improve the structural strength of the first hook 336.

Of course, the retaining ring may be fixed on the inner fire cover or the middle fire cover 32 by other structures, for example, the limit protrusion 3363 may be disposed on the second support protrusion 3271, so as to form the retaining groove 3364 between the limit protrusion 3363 and the second retaining protrusion 3272; etc., which need not be described in detail herein.

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, and the like.

Specifically, the number of the second hooks 327 is greater than or equal to 2, and less than or equal to 10, for example, 3, 4, 5, 6, 7, 8, etc. may be selected.

Specifically, the anti-drop ring is a high-temperature resistant piece to prevent deformation at high temperature. Optionally, the anti-slip ring is a metal piece, such as a steel ring.

Further, as shown in fig. 11-14, and 18-20, the number of the first hooks 336 is greater than the number of the second hooks 327. Therefore, the connection strength can be ensured, and the installation difficulty can be reduced.

Of course, in other embodiments, the anti-releasing structure may be configured in other structural forms, for example, in some embodiments, the anti-releasing structure may include a plurality of first anti-releasing members protruding from the lower surface of the annular cover 334 and distributed along the circumferential direction, and a plurality of second anti-releasing members protruding from the upper surface of the middle ring top wall 325 and distributed along the circumferential direction, the plurality of first anti-releasing members and the plurality of second anti-releasing members are arranged in one-to-one correspondence, a side surface of the first anti-releasing member facing the second anti-releasing member and a side surface of the second anti-releasing member facing the first anti-releasing member are provided with a limit rotation groove extending along the circumferential direction, and the other figure is provided with a limit rotation protrusion, the limit rotation protrusion is clamped in the limit rotation groove, when being installed, the first anti-releasing member and the second anti-releasing member are arranged in a staggered manner, and then the inner ring fire cover 33 is rotated to make the limit rotation protrusion rotatably inserted in the limit rotation groove; for another example, in another embodiment, the anti-releasing structure may include a plurality of reverse buckles protruding from the lower surface of the annular cover 334 and distributed along the circumferential direction, and a plurality of slots arranged on the upper surface of the middle ring top wall 325 and distributed along the circumferential direction, wherein the plurality of first reverse buckles are arranged in one-to-one correspondence with the plurality of slots, and the reverse buckles are clipped in the slots; for another example, the anti-separation structure may be a screw locking structure, for example, a first connection hole is formed on the annular cover 334, a second connection hole is formed on the middle ring top wall 325, and a screw passes through the first connection hole and is in threaded connection with the second connection hole; and so on.

Of course, in other embodiments, the anti-slip structure may be disposed at other positions, such as between the upper end of the middle ring outer-ring wall 324 and the periphery of the ring-shaped cover 334.

The structure of the gas panel 20 will be described further below.

Further, as shown in fig. 3, 9 and 10, the inner annular wall 211 of the outer ring gas passage is spaced apart from the outer annular wall 221 of the middle ring gas passage. Therefore, the distance between the outer ring gas channel 21 and the middle ring gas channel 22 can be increased, so as to avoid the over-concentration of the temperature at the bottom of the cooker and increase the uniformity of flame.

As shown in fig. 3, 9 and 10, the hidden air passage includes a space air passage 241 located between the inner annular wall 211 of the outer ring gas passage and the outer annular wall 221 of the middle ring gas passage and communicating with the outside air, a central air passage 242 provided inside the inner ring gas passage 23, and an inner transverse air passage 243 sequentially passing through the middle ring gas passage 22 and the inner ring gas passage 23 and communicating the space air passage 241 with the central air passage 242.

Wherein the inner annular ring hole 333 of the inner annular fire cover 33 is communicated with the central air passage 242. The external air may sequentially pass through the interval air passages 241, the inner lateral air passages 243, the center air passage 242, and the inner ring annular hole 333, and flow out from an outlet at an upper end of the inner ring annular hole 333, thereby supplementing air to the inner ring fire and the middle ring fire.

So, set up secondary air passageway 24 according to the original structure of gas distribution plate 20 self of three ring fire combustor, be convenient for promote the volume of drawing of secondary air on the one hand, on the other hand is convenient for simplify gas distribution plate 20's structure.

Further, as shown in fig. 3, 9 and 10, the hidden air passage further includes an outer transverse air passage 244 communicating the spacer air passage 241 with the outside air through the outer ring gas combustion passage 21.

In this way, the external air on the side of the burner 100/gas range can be made to flow from the outer transverse air passage 244 into the spacing air passage 241 and further to the middle of the burner 100, thereby facilitating air replenishment of the burner 100.

Furthermore, overflow impurities such as oil drops and water overflowing into the inner ring 333 can flow out of the center air passage 242, the inner lateral air passage 243, the partition air passage 241, and the outer lateral air passage 244.

Alternatively, the passage bottom wall of the inner lateral air passage 243 is provided inclined downward in the radially outward direction, and/or the annular partition plate 25 is provided inclined downward in the radially outward direction, and/or the passage bottom wall of the outer lateral air passage 244 is provided inclined downward in the radially outward direction. Therefore, overflow sundries can be conveniently discharged.

Further, as shown in fig. 3, 9 and 10, the outer transverse air passage 244 is distributed in plurality at intervals in the circumferential direction of the outer ring gas passage 21.

In this way, it is possible to facilitate an increase in the amount of the external air supplied, so that the air supply is sufficient during the use of the three-ring fire burner 100 and the gas range.

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

Further, as shown in fig. 3, 9 and 10, one of the outer transverse air passages 244 is disposed corresponding to the inner transverse air passage 243. In this way, the external air introduced into the interval air channel 241 from the outer lateral air channel 244 can be easily flowed into the inner lateral air channel 243, so that the air supply speed and efficiency can be improved.

Further, as shown in fig. 3, 9 and 10, the outer transverse air passage 244 is divergent in a radially outward direction, and/or the inner transverse air passage 243 is divergent in a radially outward direction.

In this manner, the air inlets of the outer transverse air passage 244 and/or the inner transverse air passage 243 may be made larger, which may facilitate the flow of outside air into the outer transverse air passage 244 and/or may facilitate the flow of air within the gap air passage 241 into the inner transverse air passage 243.

In the present embodiment, the outer transverse air passage 244 is divergent in a radially outward direction, and the inner transverse air passage 243 is divergent in a radially outward direction.

Further, as shown in fig. 3, 9 and 10, 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.

Of course, the inner transverse air passage 243 may be arranged to be gradually enlarged in the radial outward direction by other means, such as the axial height of the inner transverse air passage 243 is gradually increased in the radial outward direction, etc.

Further, as shown in fig. 3, 9 and 10, the circumferential width of the outer transverse air passage 244 increases in a radially outward direction, so that the outer transverse air passage 244 is gradually enlarged in a radially outward direction.

Of course, the outer transverse air passage 244 may be tapered in a radially outward direction in other ways, such as increasing the axial height of the outer transverse air passage 244 in a radially outward direction, etc.

It should be noted that the passage walls of the plurality of outer transverse air passages 244 may be separated into a plurality of outer ring gas through holes (not shown) spaced apart along the circumferential direction in the outer ring gas passage 21.

Further, as shown in fig. 3, 9 and 10, the inner annular wall 222 of the middle ring gas channel and the outer annular wall of the inner ring gas channel 23 are the same annular wall, and/or the inner annular wall 231 of the inner ring gas channel is used to form the side wall of the central air channel 242.

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

Moreover, by using the inner annular wall 231 of the inner annular gas channel to form the side wall of the central air channel 242, on the one hand, the radial dimension of the gas distributor plate 20 can be reduced, and on the other hand, the central through hole 135 or the inner annular gas channel 23 can be enlarged.

Further, as shown in fig. 3, 9 and 10, the gas distributor 20 includes an annular partition plate 25 disposed between the inner annular wall 211 of the outer ring gas passage and the outer annular wall 221 of the middle ring gas passage and connecting the inner annular wall 211 of the outer ring gas passage and the outer annular wall 221 of the middle ring gas passage, and the partition air passage 241 is formed at an upper side of the annular partition plate 25.

Thus, the inner annular wall 211 of the outer ring gas passage and the outer annular wall 221 of the middle ring gas passage can be connected by the annular partition plate 25.

Further, as shown in fig. 3, 9 and 10, the outer periphery of the annular partition plate 25 is connected to the lower channel wall of the outer lateral air channel 244, and/or the inner periphery of the annular partition plate 25 is connected to the lower channel wall of the inner lateral air channel 243. Thus, on the one hand, the structure of the air distribution plate 20 can be simplified, and on the other hand, the hidden air channel can be made more smooth, so that the air can be conveniently circulated and absorbed.

Of course, in other embodiments, air through holes may be formed in the annular partition plate 25, so that the external air under the burner 100 and the gas range may also enter the spaced 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 can be connected by a plurality of connecting ribs distributed at intervals along the circumferential direction, and a ventilation interval is formed between adjacent connecting ribs, so that the external air below the burner 100 and the gas stove can also enter the interval air channel 241; and so on.

Further, as shown in fig. 3, 9 and 10, the lower end of the outer annular wall of the innermost annular gas channel protrudes downward from the annular walls of the other annular gas channels to form a guide mounting structure when being assembled with the burner block assembly 10.

In this embodiment, the lower end of the outer annular wall of the inner annular gas channel 23 protrudes downward beyond the annular walls of the other annular gas channels to form a guide mounting structure when assembled with the burner block assembly 10.

Thus, when the gas distribution plate 20 and the burner assembly 10 are assembled, the downward protruding portion of the inner annular wall 231 of the inner annular gas channel can be aligned with the central gas inlet channel 1c of the burner assembly 10, for example, the inner annular wall 231 of the inner annular gas channel can be sleeved outside the side wall of the central gas inlet channel 1c, or the inner annular wall 231 of the inner annular gas channel can be sleeved inside the central gas inlet channel 1c, and then the gas distribution plate 20 and the burner assembly 10 are guided to approach each other, so as to achieve guiding installation.

The structure of the burner assembly 10 will be explained below.

In one embodiment, as shown in fig. 1-8, the burner assembly 10 includes a burner 11 and a removable ejector tube 18, the burner 11 having a common air inlet passage and a central through hole 135, the removable ejector tube 18 being mounted to the bottom of the burner 11, the removable ejector tube 18 being in communication with the central through hole 135 for forming a central air inlet passage 1 c.

Further, as shown in fig. 1 to 8, the furnace end 11 includes a first injection pipe joint 12, and an inner ring annular portion 13 having an inner ring air inlet ring groove 134 and a central through hole 135, a bottom portion of the inner ring annular portion 13 protrudes downward to form an inner ring half-ring air inlet protrusion 131, the first injection pipe joint 12 is connected to an outer side surface of the inner ring half-ring air inlet protrusion 131, a detachable mounting position is disposed at a bottom of the inner ring annular portion 13 on one side of the inner ring half-ring air inlet protrusion 131, and the detachable injection pipe 18 is detachably connected to the detachable mounting position, so that the detachable injection pipe 18 is communicated with the central through hole 135.

Specifically, the central air inlet passage 1c includes a pipeline of the detachable ejector pipe 18 and a central through hole 135, and the middle ring air inlet passage 1b includes a pipeline of the first ejector pipe joint 12 and an inner ring air inlet ring groove 134.

Further, as shown in fig. 1 to 8, the detachable ejector tube 18 includes a vertical mounting portion 181 and a transverse air inlet portion 182 disposed at a lower end of the vertical mounting portion 181; the vertical mounting portion 181 is mounted at the bottom of the inner annular portion 13 through a detachable mounting position, and the lateral extension portion extends in a direction away from the inner annular portion 13 on one side of the inner annular semi-ring air inlet protrusion 131. The transverse inlet 182 has a gas inlet from which gas can enter the removable ejector tube 18.

Further, as shown in fig. 1 to 8, the bottom of the inner annular ring portion 13 is provided with a plurality of mounting protrusions 132, and the plurality of mounting protrusions 132 are distributed at intervals along the circumferential direction of the central through hole 135; the removable mounting station includes a mounting hole 1321 provided in the mounting boss 132.

As shown in fig. 1 to 8, the detachable ejector tube 18 includes a plurality of connecting lugs 183, the connecting lugs 183 are disposed corresponding to the mounting protrusions 132, a connecting hole 1831 is disposed 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 is detachably connected to a detachable mounting location.

Specifically, as shown in fig. 1 to 8, a plurality of the connecting lugs 183 are disposed at the upper end of the circumferential surface of the vertical mounting portion 181 and are circumferentially spaced apart.

Specifically, the number of the mounting protrusions 132 is greater than or equal to 2, and less than or equal to 5, and 2 or 3 may be taken.

Specifically, the bottom of the inner annular portion 13 is provided with an extending annular protrusion 133 at the periphery of the central through hole 135.

Further, as shown in fig. 1 to 8, the burner 11 further includes a second injector joint 16, an inner and outer connection portion 14, and an outer annular portion 15 having an outer annular air inlet ring groove 151, the inner annular portion 13 is disposed inside the outer annular portion 15, and the inner and outer connection portion 14 connects the inner annular portion 13 and the outer annular portion 15.

Alternatively, a plurality of the inner and outer connecting portions 14 may be provided.

Specifically, as shown in fig. 1 to 8, one of the inner and outer connecting portions 14 is further connected to one of the mounting protrusions 132.

Specifically, as shown in fig. 1 to 8, a bottom portion of the outer ring annular portion 15 protrudes downward to form an outer ring half-ring air inlet convex portion 152, the second jet pipe joint 16 is connected to the outer ring half-ring air inlet convex portion 152, and an extending direction of the second jet pipe joint 16 is the same as an extending direction of the first jet pipe joint 12.

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

Specifically, the first ejector pipe joint 12 is connected with a first general ejector pipe 50, and the second ejector pipe joint 16 is connected with a second general ejector pipe 60.

The utility model discloses still provide a gas-cooker, this gas-cooker include the combustor, and the concrete structure of this combustor refers to above-mentioned embodiment, because the utility model discloses the gas-cooker has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here.

The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims (14)

1. An inner ring fire cover is used for a burner and is characterized in that the inner ring fire cover is provided with an inner ring fire hole;

the upper surface of the inner ring fire cover is convexly provided with an annular bulge, and the gas outlet of the inner ring fire hole is arranged on the annular bulge.

2. The inner ring fire cover of claim 1, wherein the inner ring fire cover further comprises an inner ring hole, and the annular protrusion is disposed outside the inner ring hole.

3. The inner ring fire cover as claimed in claim 2, wherein the annular protrusion is provided with a flow guide structure communicating an inner space and an outer space of the annular protrusion.

4. The inner ring fire cover of claim 3 wherein the flow directing structure is a flow directing notch.

5. The inner ring fire lid as claimed in claim 3, wherein the upper surface of the inner ring fire lid extends at least partially in a direction toward the center of the ring, and is inclined downwardly.

6. The inner ring fire cover of claim 5, wherein the annular protrusion is provided on a downwardly inclined section of an upper surface of the inner ring fire cover; and/or the presence of a gas in the gas,

the annular protrusion is arranged close to the inner annular ring hole.

7. The inner ring fire cover as claimed in claim 1, wherein the gas outlet of the inner ring fire hole is provided on the top surface of the annular protrusion; alternatively, the first and second electrodes may be,

and the gas outlet of the inner ring fire hole is arranged on the inner ring surface of the annular bulge.

8. The inner ring fire cover as claimed in claim 1, wherein the inner ring fire holes are formed to be inclined upward in a direction toward the center of the ring.

9. The inner fire cover of claim 1, wherein an edge of an upper surface of the inner fire cover is provided with an annular projection 3344.

10. The inner ring fire cover according to any one of claims 1 to 9, wherein the inner ring surface of the annular projection is inclined downward in a direction toward the center of the ring; and/or the presence of a gas in the gas,

the outer ring surface of the annular bulge is arranged in a downward inclined mode in the direction far away from the ring center.

11. The inner ring fire cover according to any one of claims 1 to 9, wherein the inner ring fire cover comprises an annular cover body and an inner ring inner annular wall, the inner ring inner annular wall is convexly arranged on the lower surface of the annular cover body, and the annular bulge is arranged on the annular cover body;

the inner ring fire cover is used for being installed in a middle ring hole of a middle ring fire cover of the combustor so as to enable the ring cover body, the inner ring wall and the middle ring fire cover to enclose and form an inner ring fire cavity communicated with the inner ring fire hole.

12. The inner fire lid as set forth in claim 11, wherein the annular lid body extends at least partially obliquely downward in a direction toward the center of the ring, such that an upper surface of the inner fire lid extends at least partially obliquely downward in a direction toward the center of the ring.

13. A burner comprising an inner ring fire cover as claimed in any one of claims 1 to 12.

14. A gas burner comprising a burner as claimed in claim 13.

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