CN215336314U

CN215336314U - Combustor and gas stove

Info

Publication number: CN215336314U
Application number: CN202120065335.7U
Authority: CN
Inventors: 张恩玉; 方松青; 苑善通; 贺立军; 王书春; 张蒙恩; 陈雄
Original assignee: Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd; Qingdao Haier Wisdom Kitchen Appliance Co Ltd
Current assignee: Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd; Qingdao Haier Wisdom Kitchen Appliance Co Ltd
Priority date: 2021-01-11
Filing date: 2021-01-11
Publication date: 2021-12-28
Anticipated expiration: 2031-01-11

Abstract

The application relates to the technical field of gas cookers, and discloses a burner which comprises a fire cover assembly, a burner cover assembly and a burner, wherein the fire cover assembly comprises a first annular sub fire cover and a second annular sub fire cover; the gas distribution assembly is matched with the first annular sub-fire cover to define a first annular combustion chamber and a second annular combustion chamber which are mutually independent, and is matched with the second annular sub-fire cover to define a third annular combustion chamber and a fourth annular combustion chamber which are mutually independent; wherein, first annular combustion chamber and third annular combustion chamber communicate each other, and second annular combustion chamber and fourth annular combustion chamber communicate each other. Can effectively improve the heating uniformity and reduce the complexity of operation. The application also discloses a gas stove.

Description

Combustor and gas stove

Technical Field

The application relates to the technical field of gas cookers, for example to a combustor and a gas stove.

Background

Nowadays, a gas stove is popularized to kitchen environments of thousands of households as a convenient and fast cooking appliance, and a burner of the gas stove can utilize gas fuels such as liquefied petroleum gas, artificial gas, natural gas and the like to perform direct-fire heating, so that a cooking pot can be rapidly heated. As for the existing combustor component parts, the combustor generally comprises a combustor (covering a furnace end, a gas distribution disc, a fire cover and the like), a control valve, an igniter, an injection pipe and the like, the working process of the combustor is that fuel gas supplied by an external fuel gas pipe or a fuel gas tank is conveyed to the combustor through the control valve and the injection pipe, the igniter ignites the fuel gas at the combustor to generate heat, and in the process, the control valve can adjust the conveyed fuel gas flow so as to realize the control of the fire power.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

most of existing burners are two-ring fires or three-ring fires, namely, two circles of fire holes or three circles of fire holes from inside to outside are arranged on a fire cover, each circle of fire holes are used as one circle of fire when burning, each circle of fire corresponds to an independent air supply flow path formed by a gas pipe, a furnace end furnace chamber and an internal channel of an air distribution disc, the structural design often cannot meet heating requirements under different cooking scenes, for example, under the scenes requiring uniform heating such as frying, baking and the like, the requirements of different food material consumption on heating area are different, if the existing burners need to adjust the fire of the inner and outer rings, a plurality of control valves must be controlled simultaneously, and users need to adjust the fire; the firepower of the corresponding ring fire can be changed only by adjusting one control valve, and the firepower of other ring fires is not changed, so that the pot bottom is heated unevenly, and the food materials are heated unevenly.

SUMMERY OF THE UTILITY MODEL

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a combustor and a gas stove, which can improve the heating uniformity of the combustor in the fire adjusting process and reduce the complexity of operation.

In some embodiments, the burner comprises: the fire cover assembly comprises a first annular sub fire cover and a second annular sub fire cover, and the second annular sub fire cover is sleeved on the periphery of the first annular sub fire cover; the gas distribution assembly is matched with the first annular sub-fire cover to define a first annular combustion chamber and a second annular combustion chamber which are mutually independent, and is matched with the second annular sub-fire cover to define a third annular combustion chamber and a fourth annular combustion chamber which are mutually independent; wherein the first annular combustion chamber and the third annular combustion chamber are communicated with each other, and the second annular combustion chamber and the fourth annular combustion chamber are communicated with each other.

In some embodiments, the gas stove comprises the burner shown in the above embodiments.

The combustor and the gas stove provided by the embodiment of the disclosure can realize the following technical effects:

the combustor that this embodiment provided constitutes a plurality of independent annular combustion chambers through fire lid subassembly and gas distribution assembly cooperation to with nonadjacent combustion chamber intercommunication. In this way, since the same gas flow path can supply and deliver gas to and from the plurality of combustion chambers which are not adjacent to each other, when the flow rate of the gas flow path changes, the gas of the plurality of combustion chambers corresponding to the same gas flow path also changes synchronously, and since the plurality of combustion chambers corresponding to the same gas flow path are in different loop lines, the synchronous adjustment of the heating power of the burners at different heating positions can be realized, thereby effectively improving the heating uniformity and reducing the complexity of the operation.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

fig. 1 is an exploded view of a gas distribution plate according to an embodiment of the present disclosure;

fig. 2 is an exploded view of a gas distribution plate according to an embodiment of the present disclosure;

fig. 3 is an exploded view of a gas distribution plate according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram illustrating an exploded view of another gas distribution plate provided by embodiments of the present disclosure;

FIG. 5 is a schematic diagram illustrating an exploded view of another gas distribution plate provided by embodiments of the present disclosure;

FIG. 6 is a schematic structural view of a lower gas distribution plate of another gas distribution plate provided in the embodiments of the present disclosure;

FIG. 7 is a schematic structural view of a lower gas distribution plate of another gas distribution plate provided in the embodiments of the present disclosure;

FIG. 8 is a schematic diagram illustrating an exploded view of another gas distribution plate provided by embodiments of the present disclosure;

FIG. 9 is a schematic diagram illustrating an exploded view of another gas distribution plate provided by embodiments of the present disclosure;

FIG. 10 is a schematic diagram illustrating an exploded view of another gas distribution plate provided by embodiments of the present disclosure;

FIG. 11 is an exploded view of another gas distribution plate provided in accordance with embodiments of the present disclosure;

FIG. 12 is a schematic structural view of a lower gas distribution plate of another gas distribution plate provided in the embodiments of the present disclosure;

FIG. 13 is a schematic structural view of another air distribution plate provided in the embodiments of the present disclosure;

FIG. 14 is a structural schematic of a combustor provided by an embodiment of the present disclosure;

FIG. 15 is a schematic structural view of a gas supply structure for a burner according to an embodiment of the present disclosure;

FIG. 16 is a schematic view of the communication relationship of the air distributor in the embodiment of the present disclosure;

FIG. 17 is a schematic connection diagram of a gas supply configuration for a burner provided in accordance with an embodiment of the present disclosure;

FIG. 18 is a schematic connection diagram of another air supply configuration for a burner provided by an embodiment of the present disclosure;

FIG. 19 is a schematic structural view of a gas supply structure for a burner according to an embodiment of the present disclosure;

fig. 20 is an exploded view of another gas supply structure for a burner according to an embodiment of the present disclosure;

FIG. 21 is a schematic illustration of a burner cap assembly according to an embodiment of the present disclosure;

FIG. 22 is a schematic illustration of a burner cap assembly construction according to an embodiment of the present disclosure;

FIG. 23 is a schematic structural view of a combustor provided by an embodiment of the present disclosure;

FIG. 24 is a schematic structural view of another combustor provided by the disclosed embodiment;

FIG. 25 is a schematic view of another combustor configuration provided by embodiments of the present disclosure.

Reference numerals:

100. a fire cover assembly; 101. a first annular fire sub-cap; 102. a second annular fire cover; 103. a central fire cover; 120. a first annular combustion chamber; 130. a second annular combustion chamber; 140. a third annular combustion chamber; 150. a fourth annular combustion chamber; 107 outer annular airway; 110. an inner annular air passage; 1011 a first inner annular wall; 1012. a first fire hole; 1013 a first outer annular wall; 1016. a first partition wall; 1017. a second partition wall; 1018. a first air passage; 1019 a second airway;

200. a gas distribution assembly; 2001. an air intake passage; 2002. a gas distribution channel; 201. an inner ring air inlet; 202. a middle annular air inlet groove; 2021. a middle ring air inlet; 203. an outer annular inlet slot; 2031. an outer ring air inlet; 204. an inner ring gas separation port; 205. a first gas distribution channel; 206. a second gas distribution channel; 207. a third air distribution channel; 208. a fourth air distribution channel; 209. a central gas distribution channel; 210. a lower gas distribution plate; 211. a lower tray body; 2111. a tray wall; 212. an inner annular member; 213. a middle annular member; 214. an outer annular member; 220. an intake partition member; 221. an air inlet cavity; 2211. an outer intake passage; 2212. an inner intake passage; 2213. a second type intake passage; 2214. a third type of intake passage; 222. a partition member; 230. a first intake zone; 231. a first air intake passage; 2311. a first radial air intake portion; 2312. a first circumferential air intake portion; 232. a second intake passage; 233. a central air intake passage; 2321. a second radial inlet portion; 2322. a second circumferential intake portion; 240. a first partitioning rib; 241. a first arc segment; 242. a first straight line segment; 2421. a first side first straight line segment; 2422. a second side first straight line segment; 243. a first bending section; 244. a second bending section; 250. a second partitioning rib; 251. a second arc segment; 252. a second straight line segment; 260. a third annular partition rib; 261. a first rib; 262. a second rib; 270. an air supplement channel; 271. an air make-up inlet; 272. an inboard air inlet passage; 273. an outside air inlet passage; 274. an air outlet side passage; 275. an inboard air supplement outlet; 276. an outside air make-up outlet; 280. an air deflector; 281. an arc baffle; 282. a straight plate; 290. an upper gas distribution plate; 291. an upper tray body; 292. a mating member; 293. an inner ring member; 294. a first annular gas distribution member; 295. a second annular gas distribution member; 296. a third annular gas distribution member; 297. a fourth annular gas distribution member; 298. a ramp structure; 2901. a first air outlet; 2902. a second air outlet; 2903. a third air outlet; 2904. a fourth air outlet;

300. a burner assembly; 310. a gas mixing cavity; 301. a first annular gas mixing cavity; 302. a second annular gas mixing cavity; 303. a central annular gas mixing cavity; 320. an injection pipe;

400. an air intake assembly; 410. an air inlet pipe; 420. a switching device; 401. a first intake pipe; 402. a second intake pipe; 403. a central air inlet pipe; 404. a first control valve; 405. a second control valve; 406. a central control valve.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the disclosed embodiments and their examples and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation. Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In addition, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. Specific meanings of the above terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art according to specific situations.

The term "plurality" means two or more unless otherwise specified.

In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

Fig. 14 is a schematic structural diagram of a combustor provided in the embodiment of the present disclosure. As shown in fig. 14, the burner is generally composed of a fire cover assembly 100 and a gas supply structure provided below the fire cover assembly 100 for supplying gas to the burner. Wherein the gas supply structure is used to deliver external gas to a corresponding fire cap in the fire cap assembly 100.

Generally, the gas supply structure includes one or more of the gas distribution assembly 200, the burner assembly 300, and the gas inlet assembly 400. Wherein the air intake assembly 400 is used to introduce external gas into the burner; the burner assembly 300 is used for mixing and pressurizing external gas and air; the gas distribution assembly 200 serves to distribute gas introduced into the burner into a combustion gas path corresponding to the fire cover.

Present combustor mostly is two rings of fire or three rings of fire, and two rings of fire holes or three rings of fire holes that set up from inside to outside are covered promptly to the fire, as a ring fire when every ring of fire hole burns, wherein every ring fire corresponds an independent air feed flow path that comprises an intake pipe, furnace end furnace chamber and branch gas subassembly inner channel respectively, and this kind of structural design goes out the fire form singlely, often it can not satisfy the heating demand under the different culinary art scenes.

As shown in fig. 23, the burner provided by the embodiment of the present disclosure includes a fire cover assembly 100 and a gas distribution assembly 200. The fire cover assembly 100 comprises a first annular sub fire cover 101 and a second annular sub fire cover 102, and the second annular sub fire cover 102 is sleeved on the periphery of the first annular sub fire cover 101; the gas distribution assembly 200 is matched with the first annular sub-fire cover 101 to define a first annular combustion chamber 120 and a second annular combustion chamber 130 which are independent of each other, and is matched with the second annular sub-fire cover 102 to define a third annular combustion chamber 140 and a fourth annular combustion chamber 140 which are independent of each other; wherein the first annular combustion chamber 120 and the third annular combustion chamber 140 are in communication with each other, and the second annular combustion chamber 130 and the fourth annular combustion chamber 140 are in communication with each other.

Here, gas distribution assembly 200 enters into corresponding annular combustion chamber after the gas rectification, and the annular combustion chamber in same annular sub fire lid does not influence each other, and the annular combustion chamber that communicates in the different annular sub fire lid can burn simultaneously, can realize the multiple form of putting out a fire of fire lid assembly 100 on the combustor.

For example, if no gas is supplied in a certain annular combustion chamber, no flame is formed on the circular line of the corresponding annular sub-fire cover; on the contrary, if the annular combustion chamber is internally provided with gas, flame can be formed on the circular line of the corresponding annular sub-fire cover. Meanwhile, the size of flame formed on the corresponding annular sub-fire cover can be determined according to the gas flow entering the annular combustion cavity, and generally, the gas flow and the flame size form a positive correlation relationship. Therefore, whether the flame is formed or not and the size of the flame can be controlled by adjusting the strong air supply state of the annular combustion.

The burner provided by the embodiment forms a plurality of independent annular combustion chambers by matching the fire cover assembly 100 and the gas distribution assembly 200, and communicates the non-adjacent combustion chambers. In this way, since the same gas flow path can supply and deliver gas to and from the plurality of combustion chambers which are not adjacent to each other, when the flow rate of the gas flow path changes, the gas of the plurality of combustion chambers corresponding thereto also changes simultaneously, and since the plurality of combustion chambers corresponding to the same gas flow path are located on different circular lines, the synchronous adjustment of the heating power of the burners at different heating positions can be realized, thereby effectively improving the heating uniformity and reducing the complexity of the operation.

Optionally, air distribution assembly 200 includes an air intake portion including a first air intake passage 231 and a second air intake passage 232; the air outlet end of the first air inlet channel 231 is communicated with the first annular combustion chamber 120 and the third annular combustion chamber 140; the outlet end of the second air inlet passage 232 communicates with the second annular combustion chamber 130 and the fourth annular combustion chamber 140.

Here, the air distribution assembly 200 is integrally constructed as a disc-shaped semi-closed housing adapted to the cavity and the fire cover, and the air inlet portion and the air distribution portion are formed at the housing. In the embodiments of the present application, the disk-shaped housing is referred to as a gas distribution disk.

The air inlet portion includes a plurality of air inlet channels 2001, each air inlet channel 2001 extends from inside to outside, and taking the structure of the air distribution plate 200 shown in the figure as an example, the inside to outside extension refers to a form that the air inlet channel 2001 extends from a position at the center of the circle (or close to the center of the circle) to the outer circumferential direction, and an alternative extending direction shown in the embodiment is to extend along the radial direction of the air distribution plate.

Generally, the inner and outer extension lengths of the air inlet channels are determined by the corresponding furnace chamber of the burner assembly 300 and/or the ring-shaped fire cover, so as to ensure that the air inlet channels can at least communicate with the corresponding furnace chamber of the burner and can at least deliver the gas to the ring-shaped positions of one or more corresponding ring-shaped fire sub-covers.

Optionally, as shown in fig. 16, the gas distribution assembly 200 further includes a gas distribution portion disposed above the gas inlet portion, and including a first gas distribution channel 205 corresponding to the first annular combustion chamber 120, a second gas distribution channel 206 corresponding to the second annular combustion chamber 130, a third gas distribution channel 207 corresponding to the third annular combustion chamber 140, and a fourth gas distribution channel 208 corresponding to the fourth annular combustion chamber 140; wherein, the first air intake channel 231 is communicated with the first air dividing channel 205 and the third air dividing channel 207; the second intake passage 232 communicates with the second and

fourth branch passages

206, 208.

So, through the air inlet portion and the gas portion that communicate each other in this gas distribution assembly 200, introduce the gas distribution dish with outside gas through inlet channel in and carry to a plurality of gas distribution channel that correspond the intercommunication, a plurality of gas distribution channel are supplied the gas that introduces respectively to the annular combustion chamber that corresponds for form flame on corresponding annular sub-fire cover. Because the gas distribution channels communicated with the same gas inlet channel are arranged on the gas distribution disc along non-adjacent circular lines, the synchronous adjustment of firepower at different heating positions inside and outside can be realized simultaneously aiming at the gas flow adjustment of a single gas inlet channel, thereby effectively improving the heating uniformity and reducing the complexity of operation.

In the embodiment of the present disclosure, the formation structure is mainly divided into three types according to the structural relationship between the fire cover assembly 100 and the gas distribution assembly 200, which are matched to form an annular combustion chamber.

Referring to fig. 23, in the first type combustion chamber forming structure provided in the embodiment of the present disclosure, a first partition wall 1016 is disposed inside the first annular sub fire cover 101, so as to divide the first annular sub fire cover 101 into the first annular combustion chamber 120 and the second annular combustion chamber 130 along a circular line; and/or, the second annular sub fire cover 102 is internally provided with a second partition wall 1017 which divides the second annular sub fire cover 102 into a third annular combustion chamber 140 and a fourth annular combustion chamber 140 along a circular line.

In the embodiment, the partition wall is arranged in the annular sub-fire cover, and the partition wall is abutted against the top of the gas distribution plate to divide the combustion space in the annular fire cover. The partition wall is arranged between the inner ring wall and the outer ring wall and is in a ring shape extending along the circumferential direction of the fire cover, so that the combustion space of the annular sub-fire cover is divided into an independent annular inner ring combustion space and an independent annular outer ring combustion space, and the inner ring combustion space and the outer ring combustion space are prevented from sharing one air passage.

Referring to fig. 24, in the second type of combustion chamber forming structure provided by the embodiment of the present disclosure, a first rib 261 formed along a circular line is provided at the top of the gas distributing portion, and the top of the first rib 261 abuts against the inner side of the top wall of the first annular sub-flame cover 101, and cooperates with the first annular sub-flame cover 101 to define a first annular combustion chamber 120 and a second annular combustion chamber 130 which are independent; and/or the top of the gas distribution part is provided with a second rib 262 formed along a circular line, the top of the second rib 262 abuts against the inner side of the top wall of the second annular sub-fire cover 102, and the second rib 262 and the second annular sub-fire cover 102 are matched to define a third annular combustion chamber 140 and a fourth annular combustion chamber 140 which are independent; the second rib 262 is provided at the outer periphery of the first rib 261.

Generally, the gas distribution channel of the gas distribution plate is arranged on the top surface of the shell, wherein the gas distribution channel plays a role of a 'gas outlet' of the gas distribution plate, and gas from the gas inlet channel can flow out of the gas distribution plate from the gas distribution channel corresponding to the gas inlet channel and then enter the combustion cavity formed by matching with the annular sub-fire cover.

Set up along the fashioned protruding muscle of loop line through the top (divide gas dish top promptly) at the gas portion of dividing to make protruding muscle and the inboard counterbalance of the roof of the sub fire lid of annular that corresponds lean on, realize the separation to the inside combustion space of the sub fire lid of annular, thereby separate the combustion space of the sub fire lid of annular for independent annular inner ring combustion space and annular outer ring combustion space, avoid inner ring combustion space and outer ring combustion space to share an air flue. When the tops of the first convex ribs 261 and/or the second convex ribs 262 abut against the inner sides of the top walls of the corresponding annular sub-fire covers, the combustion space of the annular sub-fire covers is divided into an independent annular inner ring combustion space and an annular outer ring combustion space, and then the first annular sub-fire covers 101 are matched with gas distribution channels on two sides of the first convex ribs 261 to define two independent annular combustion chambers distributed along adjacent circular lines; the second annular sub-fire cover 102 and the gas distribution channels on both sides of the second ribs 262 cooperate to define two independent annular combustion chambers distributed along adjacent circular lines.

Referring to fig. 25, in the third type of combustion chamber forming structure provided in the embodiment of the present disclosure, a first partition wall 1016 is disposed inside the first annular sub-fire cover 101, a first rib 261 formed along a circular line is disposed at the top of the gas distribution portion, and the first partition wall 1016 abuts against the first rib 261 to cooperatively define a first annular combustion chamber 120 and a second annular combustion chamber 130 which are independent; a second partition wall 1017 is arranged inside the second annular sub fire cover 102, a second convex rib 262 formed along a circular line is arranged at the top of the gas distribution part, and the second convex rib 262 is arranged on the periphery of the first convex rib 261; the second partition 1017 abuts against the second rib 262 to cooperatively define the third annular combustion chamber 140 and the fourth annular combustion chamber 140 which are independent.

Here, the first dividing wall 1016 is formed on the cap along a circular line corresponding to the circular line along which the first rib 261 is formed on the top of the gas-distributing portion, so that the two can be abutted when being installed or used, so that the first annular sub-cap 101 and the gas-distributing portion together define the first annular combustion chamber 120 and the second annular combustion chamber 130 which are independent and distributed along the adjacent circular lines. The second partition 1017 is arranged in the same way as the second rib 262.

The structure of the annular sub fire cap of the fire cap assembly 100 in the embodiment of the present disclosure is further designed in combination with the formation structure of the three types of combustion chambers described above.

As shown in fig. 19, the fire lid assembly 100 includes a first annular sub fire lid 101 and a second annular sub fire lid 102, and the second annular sub fire lid 102 is fitted around the outer circumference of the first annular sub fire lid 101. Optionally, two separate annular combustion chambers are formed in the first annular sub-fire cover 101, and similarly, two separate annular combustion chambers are formed in the second annular sub-fire cover 102; here, the annular combustion chamber corresponds with the branch gas passageway position that corresponds, and gas distribution disc 200 gets into corresponding annular combustion chamber after with the gas rectification, and the annular combustion chamber in the same annular sub fire lid does not influence each other, and the annular combustion chamber that communicates in the different annular sub fire lids can burn simultaneously, can realize the multiple form of putting out a fire of fire lid subassembly 100 on the combustor.

Optionally, the fire lid assembly 100 further comprises a central fire lid 103 disposed inside the first annular sub-fire lid 101 and concentrically disposed with the first annular sub-fire lid 101 and the second annular sub-fire lid 102; the gas distributor plate also cooperates with the central fire cover 103 to define a central combustion chamber. The central fire cover 103 is communicated with the central air inlet channel 233 of the air distribution plate, the central air distribution channel 209, the central annular air mixing cavity 303 of the furnace chamber assembly and the central air inlet pipe 403 of the air inlet assembly.

As shown in fig. 21 and 23, the partition wall 107 provided in the first annular sub fire cover 101 is named as a first partition wall 1016, the first partition wall 1016 is located between the first inner annular wall 1011 and the first outer annular wall 1013, and defines a first air passage 1018 (the inner annular air passage 110 of the first annular sub fire cover 101) with the first inner annular wall 1011 and a second air passage 1019 (the outer annular air passage 111 of the first annular sub fire cover 101) with the first outer annular wall 1013, the first fire holes 1012 are communicated with the first air passage 1018, and the second fire holes 1014 are communicated with the second air passage 1019. Similarly, the dividing wall provided in the second annular sub fire cover 102 is named as a second dividing wall, and the inside of the second annular sub fire cover 102 also defines a third air passage (inner ring) and a fourth air passage (outer ring) which are not communicated with each other through the second dividing wall.

Then, the fire cover assembly 100 is mounted to the gas distribution assembly 200, as shown in fig. 23, and the first gas passage and the first gas distribution passage cooperate to define a first annular combustion chamber 120; the second air passage and the second gas distribution passage are matched to define a second annular combustion chamber 130; the third air passage and the third air distribution passage are matched together to define a third annular combustion cavity 140; the fourth air passage and the fourth air distribution passage are matched together to define a fourth annular combustion chamber 150; wherein the first annular combustion chamber 120 is in communication with the third annular combustion chamber 140; the second annular combustion chamber 130 communicates 150 with the fourth annular combustion chamber.

Like this first fire hole and the same gas circuit air feed of third fire hole sharing, second fire hole and fourth fire hole are with same gas circuit air feed to adjust the firepower size when realizing the not adjacent fire hole of same gas circuit air feed, need not go on alone, reduce the regulation complexity of combustor. When carrying out the firepower and adjusting, the fire hole of same annular sub fire lid both sides can carry out the regulation of firepower size respectively, and can switch respectively for the fire lid can adapt to the scene that the heating area is changeable and need all with the heating, can only be with big or small and the switching simultaneously when avoiding the fire hole of inner rampart and the fire hole firepower of outer rampart that the fire hole of outer rampart sharing an air flue of inner rampart leads to and the fire hole firepower of outer rampart to adjust, can not adapt to the changeable and scene that needs the even heating of heating area.

A plurality of independent annular combustion chambers are formed by matching the fire cover assembly 100 and the gas distribution assembly 200, and the non-adjacent combustion chambers are communicated. In this way, since the same gas flow path can supply and deliver gas to and from the plurality of combustion chambers which are not adjacent to each other, when the flow rate of the gas flow path changes, the gas of the plurality of combustion chambers corresponding thereto also changes simultaneously, and since the plurality of combustion chambers corresponding to the same gas flow path are located on different circular lines, the synchronous adjustment of the heating power of the burners at different heating positions can be realized, thereby effectively improving the heating uniformity and reducing the complexity of the operation.

Optionally, in sharing the fire hole of same gas circuit air feed, be located the trompil area of inboard fire hole and be less than the trompil area of the fire hole that is located the outside, because on the pan toward outer heating area more big more, design like this makes the fire hole adapt to pan heating area everywhere more. Namely: the first fire hole and the third fire hole share the same gas path for gas supply, and the open area of the first fire hole is smaller than that of the third fire hole.

Optionally, the ratio of the fire area of the combustion channel corresponding to the gas distribution channel communicated with the same air inlet channel from inside to outside is 1:2-1: 5. Specifically, the ratio of the opening area of the first fire hole to the fire outlet area of the third fire hole ranges from 1:2 to 1: 3; the ratio of the opening area of the second fire hole to the fire outlet area of the fourth fire hole ranges from 1:3 to 1: 5.

In order to realize the characteristics of stable gas supply, uniform heating and diversified fire discharging forms of the burner in the present embodiment, the present embodiment provides a gas supply structure for the burner. Fig. 19 is a schematic sectional structure view of a burner according to an embodiment of the present disclosure, fig. 20 is an exploded schematic structural view of a gas supply structure for a burner according to an embodiment of the present disclosure, and fig. 16 is a schematic communication relationship view of a gas distribution assembly according to an embodiment of the present disclosure. As shown, the gas supply structure includes a gas distribution assembly 200 and a burner assembly 300. The burner assembly 300 includes a plurality of annular air mixing chambers 310 concentrically arranged; the gas distribution assembly 200 is arranged above the burner assembly 300; the air distribution assembly 200 comprises an air inlet channel 2001 and air distribution channels 2002, wherein air inlets of the air inlet channel 2001 are communicated with the corresponding annular air mixing cavities 310, and at least one air inlet channel 2001 is communicated with the air distribution channels 2002 which are positioned on non-adjacent circular lines; the air inlets of the adjacent air inlet channels 2001 are arranged on different circular lines at the bottom of the air distribution assembly 200 and are arranged in a staggered manner corresponding to the corresponding annular air mixing chambers 310.

Here, the gas distribution assembly 200 is provided on the burner assembly 300 to achieve distribution of gas introduced into the burner into the combustion gas path corresponding to the fire cover. The external gas enters the corresponding annular gas mixing cavity 310 in the burner assembly, and after being uniformly mixed in the annular gas mixing cavity 310, the gas is rectified by the gas distribution assembly 200 and then enters the communicated gas distribution channels to supply gas for the independent gas paths corresponding to the gas distribution channels on the burner.

The air feed structure for combustor that this embodiment provided, furnace end subassembly 300 cooperatees with minute gas subassembly 200, through the air inlet dislocation set with inlet channel 2001, make the gas in the annular gas mixing chamber 310 can get into corresponding inlet channel 2001 and shunt to the branch gas channel 2002 on the different ring lines in, the gas in the same annular gas mixing chamber 310 can be to the defeated gas of branch gas channel 2002 on the nonadjacent ring line, the branch gas area of gas has been enlarged, the reposition of redundant personnel area of gas has been enlarged, the variety of the mode of putting out a fire has been increased, the flexibility of heating area has been increased, can satisfy multiple culinary art demand, effectively improve the heating homogeneity, reduce the loaded down with trivial details nature of operation.

Alternatively, the number of the annular air-mixing chambers 310 corresponds to the number of the intake passages 2001, the intake passages 2001 communicating with the same branch passage 2002, the intake ports of which communicate with the same annular air-mixing chambers 310.

Alternatively, the air inlet of the air inlet passage 2001 is disposed at the center side of the bottom of the air distribution assembly 200. The gas distributing channels are arranged from inside to outside along different circular lines, so that the fuel gas flows from inside to outside along the radial direction after entering the gas inlet channel from the gas mixing cavity and enters one or more gas distributing channels communicated with the gas inlet channel. The gas distribution area of the gas is enlarged, the diversity of fire outlet modes is increased, the flexibility of heating areas is increased, and various cooking requirements can be met, such as frying, baking and other cooking heating scenes.

In some embodiments, the air inlets of the plurality of air inlet channels 2001 are disposed on the circle center side of the air distribution disk 200 and are disposed corresponding to the positions of the respective corresponding annular air mixing chambers. For example, the air inlet passage 2001 includes a first air inlet passage and a second air inlet passage, wherein the first air inlet passage corresponds to the annular air mixing cavity inside the burner, and the second air inlet passage corresponds to the annular air mixing cavity outside the burner, so that the circular line where the air inlet of the first air inlet passage is located is disposed inside the circular line where the air inlet of the second air inlet passage is located.

Alternatively, as shown in fig. 20, the annular air mixing cavity 310 in this embodiment includes a central annular air mixing cavity 303, a first annular air mixing cavity 301, and a second annular air mixing cavity 302, which are sequentially sleeved from inside to outside, or the number of the annular air mixing cavities is set according to the number of the air inlet channels. In the present embodiment, the first annular air mixing chamber 301 communicates with the first air intake passage 231, the second annular air mixing chamber 302 communicates with the second air intake passage 232, and the central annular air mixing chamber 303 communicates with the central air intake passage 233. Thereby, the corresponding communication of the burner assembly 300 and the gas distribution assembly 200 is achieved.

On the other hand, the number of the annular air-mixing chambers 310 corresponds to the number of the air inlet pipes 410 for supplying air to the same air-separating passages 2002, the air inlet ports of which communicate with the same annular air-mixing chambers 310.

Optionally, the number of the first air intake channels 231 and the second air intake channels 232 is multiple and the first air intake channels and the second air intake channels are arranged in groups in a one-to-one correspondence manner; the first inlet channel 231 of multiunit and the second inlet channel 232 are evenly arranged along circumference according to equal radian interval for the gas that divides the gas channel output on each loop can be more even distribution in circumference, improves the air feed stationarity.

Optionally, the burner assembly 300 further includes a plurality of ejector pipes 320 disposed corresponding to the air inlets of the annular air mixing chamber 310. Generally, the injection pipe 320 is used to uniformly mix high-energy fuel gas and low-energy air, so as to ensure the heat flow required by the burner.

Further, in order to realize the characteristics of stable air supply, uniform heating and diversified fire discharging forms of the burner in the embodiment, the air distribution assembly applied to the embodiment is further provided. Here, the air distribution assembly 200 is integrally constructed as a disc-shaped semi-closed housing adapted to the cavity and the fire cover, and the air inlet passage and the air distribution passage are formed in the housing. In the embodiments of the present application, the disk-shaped housing is referred to as a gas distribution disk.

Generally, the gas distributor is used in cooperation with the burner head assembly 300 and the fire cover assembly 100 of the burner, and an alternative assembly method is to arrange the gas distributor between the burner head assembly 300 and the fire cover assembly 100 and to communicate with the intermediate flow path of the gas (or the mixed gas of air and gas) between the burner head assembly 300 and the fire cover assembly 100, so that the gas enters the gas distributor from the burner head 300 and then flows into the fire cover assembly 100, and is finally ignited at the fire holes of the fire cover assembly 100 to form flames.

Here, for the heating area and the heating homogeneity of the combustor to the container of putting above fire lid subassembly 100, optionally, the fire lid generally comprises two or more than two sub fire lids of annular, the coaxial setting of the sub fire lid of different annular and from inside to outside overlap in proper order and establish, be provided with a plurality of fiery holes on each sub fire lid of annular respectively, a plurality of fire holes are along the even arrangement of this sub fire lid circumference of annular, a plurality of fire holes that make on each sub fire lid of annular can be formed with an annular flame respectively, a plurality of annular flame can heat the container in its respective corresponding ring line position.

Optionally, one or more groups of fire holes respectively located on different circular lines are arranged on the same annular sub-fire cover, and each group of fire holes can respectively form an annular flame on the ring where the fire holes are located.

Correspondingly, the gas distribution plate 200 has a plurality of gas flow channels for gas to flow, and after the gas enters the gas distribution plate 200 through the furnace end, the gas can flow through the plurality of gas flow channels and is finally distributed to the annular sub-fire covers corresponding to the fire covers, so as to supply gas to the fire holes in different annular positions respectively. In this embodiment, the furnace end has a plurality of mutually independent annular air mixing cavities, and a plurality of annular air mixing cavities set up with one heart and from inside to outside overlap in proper order and establish, and each annular air mixing cavity intercommunication divides one or more air current passageway of gas disk, and the air feed that also each annular air mixing cavity in the furnace end has or not state, can decide respectively and have or not the gas supply in the one or more air current passageway that correspond separately, and then influence whether each air current passageway corresponds the sub-fire lid of annular and can form flame.

For example, if no gas is supplied to a certain annular gas mixing cavity, no gas flows through the corresponding gas flow channel, so that no flame is formed on the ring line of the corresponding annular sub-fire cover; on the contrary, if the annular gas mixing cavity is supplied with gas, flame can be formed on the circular line of the corresponding annular sub-fire cover. Meanwhile, the size of flame formed on the corresponding annular sub-fire cover can be determined according to the gas flow from the annular gas mixing cavity, and generally, the gas flow and the flame size form a positive correlation relationship. Therefore, whether the flame is formed or not and the size of the flame can be controlled by adjusting the gas supply state of the annular gas mixing cavity.

The embodiment of the present disclosure provides a gas distribution plate 200, which includes an air inlet portion and a gas distribution portion that are communicated with each other. The gas inlet part can be used for being communicated with the side of the annular gas mixing cavity so as to introduce the fuel gas from the annular gas mixing cavity into the gas distribution disc 200 and convey the fuel gas to the gas distribution part; the gas distribution part can be used for being communicated with the fire cover side so as to supply the fuel gas introduced by the gas inlet part to the corresponding annular sub fire covers respectively.

In the present embodiment, the air intake portion includes a plurality of air intake passages 2001, each air intake passage 2001 extends from inside to outside, and taking the structure of the air distribution plate 200 shown in the drawing as an example, the inside to outside extension means that the air intake passages 2001 extend substantially from the position of the center of the circle (or near the center of the circle) to the outer circumferential direction, and an alternative extending direction shown in the embodiment is to extend in the radial direction of the air distribution plate.

Generally, the inner and outer extension lengths of the air inlet channel 2001 are determined by the ring line positions of the corresponding burner annular air mixing cavity and/or the annular sub-fire cover, so as to ensure that the air inlet channel 2001 can at least communicate with the corresponding burner annular air mixing cavity and can at least deliver the fuel gas to the ring line positions of one or more corresponding annular sub-fire covers.

In this embodiment, the gas distribution portion includes gas distribution channels 2002 located in different circular lines from inside to outside, and the gas distribution channels 2002 on some or all of the non-adjacent circular lines are communicated with the same gas inlet channel 2001.

The gas distribution plate provided by this embodiment communicates the gas distribution channels 2002 on part or all of the non-adjacent loops of the gas distribution portion with the same gas inlet channel 2001, so that at least one gas inlet channel 2001 can respectively convey gas to the fire hole rings respectively corresponding to the gas distribution channels 2002 of different loops, and thus when the gas flow rate of the gas inlet channel 2001 changes, the gas of the corresponding gas distribution channel 2002 and the corresponding fire hole ring can also change simultaneously, and meanwhile, because the loops of the fire hole rings corresponding to the same gas inlet channel 2001 are located at different inner and outer heating positions, the gas flow rate adjustment for a single gas inlet channel 2001 can simultaneously realize synchronous adjustment of firepower at different inner and outer heating positions, thereby effectively improving heating uniformity and reducing complexity of operation.

Optionally, the number of the circular lines of the gas distribution channels 2002 is the same as the number of the circular lines of the fire holes in the fire cover, and meanwhile, the positions of the circular lines distributed on the gas distribution channels 2002 correspond to the positions of the circular lines of the fire holes, so that each gas distribution channel 2002 can convey fuel gas to a group of fire holes in the corresponding position.

Optionally, the number of the gas distribution channels 2002 corresponding to each loop is one or more; the gas distribution channels 2002 corresponding to the same loop line are uniformly distributed along the loop line, so that gas can uniformly enter the annular sub-fire cover from the gas distribution channels 2002 at different positions of the loop line, and the uniformity and stability of fire power distribution of flame are guaranteed.

In an alternative embodiment, the gas distributor 200 is integrally constructed as a disc-shaped semi-enclosed housing that fits the annular gas mixing chamber and the fire lid, and the gas inlet portion and the gas distributor portion are formed in the housing.

Optionally, the air inlet passage 2001 is formed inside the housing, and one or more air inlets for communicating the annular air mixing cavity are formed on the bottom surface of the housing; optionally, each air inlet passage 2001 corresponds to an independent air inlet, so that each air inlet passage 2001 can be communicated with the annular air mixing cavity through the air inlet, and the fuel gas enters the air inlet passage from the annular air mixing cavity through the air inlet.

In the structure of the gas distributor 200 shown in fig. 1, 4, 6 and 8, the inlet of the inlet channel 2001 is arranged at the center of the gas distributor 200, which is defined as a first type of inlet channel, i.e. the inlet end of the first type of inlet channel is arranged at the center of the circle, the outlet end of the first type of inlet channel is arranged at the circumference, and the main flowing direction of the gas after entering the gas distributor 200 is from the center of the circle to the circumference.

In still other embodiments, as shown in fig. 13, the intake form of the intake passage 2001 may also be the second type of intake passage 2213 and/or the third type of intake passage 2214.

Here, the air inlet end of the second type air inlet passage 2213 is arranged on the circumferential side, and the air outlet end at least comprises an end arranged on the circle center side, that is, the main flowing direction of the fuel gas flowing through the air distribution plate via the second type air inlet passage 2213 is from the element circumferential side to the circle center side.

The inlet end of the third type inlet passage 2214 is arranged on the middle ring, and the outlet end at least comprises a circle center side and a circumference side, that is, the main flowing direction of the gas flowing through the gas distribution plate via the third type inlet passage 2214 is from the middle ring position to the circle center side and the circumference side.

The second type inlet passage 2213 and the third type inlet passage 2214 are arranged at positions close to the outer peripheral sides of the inlet ends, so that the flowing distance of the gas flowing from the inlet ends to the outer peripheral sides can be shortened, and the pressure loss of the gas flowing in the inlet passages can be reduced because the outer peripheral sides require more gas; further, the reduction of the flow path also makes it possible to reduce the speed of the flow of the fuel gas toward the outer ring side burner ring after the opening of the burner, thereby improving the ignition response speed of the burner ring on the outer ring side at the time of ignition of the burner.

The gas tray that this embodiment provided is provided with one kind or several kinds of different inlet channel structural style for the gas can be with the business turn over air flow path flow through the gas tray that divides of difference, and then to the gas channel that divides of the different loop line that corresponds separately carrying the gas, different inlet channel structural style can be suitable for respectively to divide the differentiation air feed demand of gas channel more than two or two, promote to divide the homogeneity and the gas flow, the stability of pressure that send the gas to different gas channel branches, thereby can effectively ensure the combustion effect of gas-cooker.

Alternatively, as shown in fig. 13, the intake passages are configured in a circle-symmetrical structure, where positions of the same intake passage of the intake passages communicate with each other and share the same intake end through which the gas flows into the intake passage and then flows to the positions of the intake passage.

Optionally, for an air distributor provided with two or more than two air inlet passages, for example, a certain air distributor is provided with the first type air inlet passage and the second type air inlet passage 2213 at the same time, or a certain air distributor is provided with the first type air inlet passage, the second type air inlet passage 2213 and the third type air inlet passage 2214 at the same time; different air inlet channels are alternately arranged along the circumferential direction so as to ensure the combustion uniformity of the fire hole rings corresponding to the air inlet channels of different types as much as possible.

Optionally, for the second type of air inlet passage 2213 and the third type of air inlet passage 2214, since the air inlet end is far away from the air distribution plate, if a lantern ring type annular air mixing cavity air supply manner is still adopted, there may be a problem that the air inlet end cannot correspond to the annular air mixing cavity, in some embodiments, a plurality of injection pipes 320 of the burner may be communicated with different air inlet passages of the air distribution plate in a one-to-one correspondence manner, so as to directly supply air to the corresponding air inlet passages through the injection pipes 320.

Optionally, the air inlet end of the air inlet channel is configured to be matched with the caliber of the fuel gas outlet of the injection pipe 320.

Generally, the axes of the injection pipes 320 are located in the same plane, so that in order to reduce the structural interference influence between the injection pipes 320 in the arrangement form that the injection pipes 320 are directly communicated with the gas distribution plate, at least two injection pipes 320 are arranged at an included angle, and the included angle may be 20 °, 60 °, 90 °, 120 ° or the like.

Exemplarily, as shown in fig. 13, 3 ejector pipes 320 are provided in the embodiment of the present disclosure, wherein 2 ejector pipes 320 are arranged in parallel to each other, and these 2 ejector pipes supply air to the central air inlet passage and the third air inlet passage respectively, and because the 3 rd ejector pipe corresponds to the second air inlet passage, the 3 rd ejector pipe 320 that is parallel to other ejector pipes 320 is structurally interfered with the ejector pipe 320 that supplies air to the central air inlet passage, so that this 3 rd ejector pipe 320 is arranged at an included angle of 90 ° with respect to the other 2 ejector pipes 320.

In another alternative, the gas distribution channel is opened on the top surface of the housing, where the gas distribution channel functions as a "gas outlet" of the gas distribution plate, and the gas from the gas inlet channel can flow out of the gas distribution plate from the gas distribution channel corresponding to the gas inlet channel and then enter the fire cover.

The gas distribution plate of the embodiment of the present disclosure generally includes a lower gas distribution plate 210 and an upper gas distribution plate 290, and the lower gas distribution plate 210 and the upper gas distribution plate 290 are sealably connected to prevent leakage of gas flowing therethrough. Alternatively, after the two are fastened, a threaded connection or a welded connection can be adopted.

Optionally, the connecting end surfaces of the lower air distribution plate 210 and the upper air distribution plate 290 are planar. The sealing performance of the connection is improved.

Optionally, the lower gas distributor plate 210 is a casting or a forged part.

In the embodiment of the present disclosure, the provided gas distribution trays are mainly classified into three types according to the structure of the lower gas distribution tray 210.

Referring to fig. 1 to 3, a first type of gas distribution plate provided in the embodiments of the present disclosure is described, which includes a lower gas distribution plate 210 and an upper gas distribution plate 290, where the lower gas distribution plate 210 has one or more gas inlet partitions, and each gas inlet partition is provided with a partition structure for partitioning the gas inlet partition into a plurality of gas inlet channels; the upper gas distribution plate 290 comprises gas distribution channels located on different circular lines from inside to outside, and the gas distribution channels of part or all of the non-adjacent circular lines are communicated with the same gas inlet channel.

The first kind of gas dish that divides of this disclosed embodiment, through the setting of the subregion of admitting air on the lower gas dish 210 for the gas that gets into by an air inlet on the lower gas dish 210 can be shunted to the gas channel that divides on the different loop lines on the last gas dish 290 of dividing, the gas area of dividing of gas has been enlarged, the reposition of redundant personnel area of gas has been enlarged, the variety of the mode of putting out a fire has been increased, the flexibility of heating area has been increased, can satisfy multiple culinary art demands, for example, fry in shallow oil, cook the heating scene such as searing.

In some embodiments, the lower gas distribution plate 210 comprises a lower plate body 211, one or more gas inlet partition members, and a partition member 222, the lower plate body 211 having an inner ring gas inlet 201 and a plurality of annular gas inlet slots; each air inlet partition member has an air inlet cavity 221 and is arranged on the lower disc body 211 along the radial direction of the lower disc body 211; the partition member 222 is disposed in the intake chamber 221 of the intake partition member, and partitions the intake chamber 221 into a plurality of intake passages; and one air inlet passage is correspondingly communicated with one annular air inlet groove of the lower disc body 211.

In this embodiment, the burner further includes an annular air mixing cavity located at the center of the circle, the inner ring air inlet 201 is a central air inlet channel as an air distribution disc and communicated with the annular air mixing cavity, the central air inlet channel is formed by extending along the central axis of the air distribution disc, the lower end of the central air inlet channel is an air inlet end, the upper end of the central air inlet channel is an air outlet end, and the gas flows through the central air inlet channel from bottom to top.

In this embodiment, the number of the annular intake grooves of the lower disc 211 is equal to the number of the intake passages partitioned in the intake partition member, and one intake passage is correspondingly communicated with one annular intake groove. Then, the fuel gas that every annular air inlet groove inserts flows into the branch gas passageway on the nonadjacent ring line through corresponding inlet channel, has realized the branch gas of one-to-many, has increased the flexibility of dividing the gas.

In some embodiments, the lower disc 211 includes a disc wall 2111 and a plurality of annular members, a through hole is provided at the center of the disc wall 2111, and the plurality of annular members are concentrically provided on the disc wall 2111 to form the inner ring air inlet 201 and the plurality of annular air inlet grooves. In this embodiment, the through holes on the surrounding plate wall 2111 of the innermost annular member form the inner-ring air inlet 201, and the remaining annular members are concentrically arranged to form a plurality of annular air inlet grooves. In this embodiment, a plurality of annular air inlet grooves provided on the tray wall 2111 of the lower tray body 211 are butted with the air outlet of the burner to receive the gas. The number of the annular air inlet grooves is determined according to actual requirements.

Optionally, the annular member is an annular rib member having a height.

Optionally, the number of annular inlet slots is 2. As shown in fig. 2, the inner annular member 212 surrounds the through hole in the disk wall 2111, the middle annular member 213 and the outer annular member 214 are concentrically disposed on the disk wall 2111 in this order from the inside to the outside, and the outer annular member 214 is disposed on the edge of the disk wall 2111, and the inner ring intake port 201, the middle annular intake groove 202, and the outer annular intake groove 203 are formed in this order on the lower disk 211.

Alternatively, the intake chamber 221 of the intake partition member is partitioned into two intake passages by the partition member 222; respectively, defined as an outer intake passage 2211 and an inner intake passage 2212. The outer intake passage 2211 communicates with the outer annular intake groove 203, and the inner intake passage 2212 communicates with the middle annular intake groove 202.

Alternatively, the plate wall 2111 of the lower plate 211 is a curved surface, and a plurality of annular members are disposed on the concave wall surface, and the intake partition member is disposed on the convex wall surface of the lower plate 211.

Optionally, an air replenishment passage 270 is formed between a portion of the outwardly convex wall surface of the tray wall 2111 of the lower tray body 211 and the intake partition member. As shown in fig. 1, an air supply passage 270 is formed between a part of the outer convex wall surface of the tray wall 2111 of the lower tray body 211 and the outer walls of two adjacent intake partition members. An air supplement outlet is provided at a corresponding position on the upper air distribution plate 290. The contact amount of the fuel gas with the air in the combustion process is improved, and the combustion efficiency is improved.

Optionally, the air make-up channel 270 includes a first air make-up channel and a second air make-up channel.

Wherein, the first air supplement channel is formed by extending from the bottom of the air distribution disk from outside to inside, the air inlet end of the first air supplement channel is arranged at the outer periphery side of the air distribution disk, and the air outlet end of the first air supplement channel at least extends to the space between the outer annular member 214 and the middle annular member 213; the first air supplement channel is used for conveying air to the interval formed between the circular lines where the first air distribution channel and the second air distribution channel are respectively located, and the first air supplement channel extends and forms along the circumferential direction of the circular line where the first air supplement channel is located.

The second air supplement channel is formed by extending from the bottom of the air distribution disc from outside to inside, the air inlet end of the second air supplement channel is arranged on the outer peripheral side of the air distribution disc, the air outlet end of the second air supplement channel at least extends to the position between the inner annular component 212 and the middle annular component 213 and is used for conveying air to the interval formed between the circular lines of the second air distribution channel and the third air distribution channel, and the second air supplement channel extends and is formed along the circumferential direction of the circular line of the second air distribution channel and the third air distribution channel.

Here, the air supplement channel 270 can increase the amount of air around its corresponding at least one burner ring to promote more complete combustion of the gas.

The plurality of air inlet channels are uniformly distributed at intervals along the circumferential direction, and the air outlet ends of the first air supplement channels are surrounded by the adjacent air inlet channels, the outer annular member and the middle annular member; the adjacent air inlet channel, the inner annular member and the middle annular member jointly enclose an air outlet end of the second air supplement channel.

In yet another alternative (not shown in the figures), the first air supplement channel is concavely formed relative to the bottom surface of the air distribution plate and is positioned between two adjacent air inlet channels; similarly, the second air supplement channel is concavely formed relative to the bottom surface of the air distribution plate and is positioned between two adjacent air inlet channels. The concave forming mode can reduce the protrusion of the bottom surface of the lower air distribution plate 210 and improve the pressure resistance of the air distribution plate.

In this embodiment, the first air supplement channel is gradually folded from the outside to the inside, and the second air supplement channel is gradually folded from the outside to the inside. Illustratively, the first air makeup channel body has a flared or tapered concave configuration.

In some alternative embodiments, the plurality of first air supplement channels are uniformly arranged along the circumferential direction of the air distribution plate, and/or the plurality of second air supplement channels are uniformly arranged along the circumferential direction of the air distribution plate. So that the air can be uniformly supplemented from a plurality of positions in the circumferential direction of the air distribution plate to the inner side, and the stability and uniformity of flame combustion are further ensured.

In the embodiment of the present disclosure, the number of the intake partition members is not limited, and may be determined according to actual needs. Optionally, the intake partition member is 1, 2, 3, 4 or more. When the number of the intake partition members is plural, the intake partition members are uniformly distributed on the lower disc 211 in the radial direction around the center of the lower disc 211.

Alternatively, when there are a plurality of intake partition members, the end surfaces of the intake chambers 221 of the plurality of intake partition members are located on the same horizontal plane, which is the connecting end surface of the lower air distribution plate 210. Improving the sealing connection with the connecting end surface of the upper gas distribution plate 290.

In some embodiments, the intake partition member extends radially of the lower disc 211 to the outside of the lower disc 211. The gas distribution area of the gas distribution plate is increased.

In the embodiment of the present disclosure, the structure of the intake partition member is not limited, and the intake air may be guided into the air distribution passage of part or all of the non-adjacent circular lines of the upper air distribution plate 290.

In some embodiments, in the radial direction of the lower disk body 211, the bottom wall of the intake partition member is bent toward the upper air distribution disk 290 side and the circumferential width of the intake chamber 221 is enlarged. That is, the bottom wall of the inlet channel is curved to be close to the side of the upper gas distribution plate 290, the inlet gas is guided to flow to the upper gas distribution plate 290, and the expanded inlet channel is used for buffering the outlet pressure, so that the gas can more smoothly enter the gas distribution channel of the upper gas distribution plate 290. In this embodiment, the air intake partition member is in a bucket shape, and a cavity of the bucket-shaped air intake partition member is the air intake cavity 221.

In some embodiments, the intake chamber 221 of the intake partition member includes a radial portion and a circumferential portion, the circumferential portion being located on the outside and the circumferential portion having a circumferential width greater than the radial portion; each of the intake passages (the inner intake passage 2212 and the outer intake passage 2211) partitioned by the partition member 222 includes a radial extension and a circumferential extension that communicate. The peripheral circumferential structure of the air inlet partition is increased, the air distribution area of the outer ring can be increased, meanwhile, the supporting area of the upper air distribution disc 290 is also increased, and the structure of the air distribution disc is more stable.

Optionally, the radial extension portion is formed by extending from inside to outside along the radial direction of the gas distribution plate, and each gas distribution channel is communicated with the corresponding radial extension portion.

Optionally, the air inlet cavity 221 is shaped like a letter "7" as a whole, and the air inlet channel is also shaped like a letter "7".

Optionally, the plurality of air inlet channels are evenly arranged along the circumferential direction at equal radian intervals. Use the inlet channel who corresponds the same ring line and divide the combination of gas channel as the example, the quantity that corresponds the inlet channel who sets up in this embodiment is 4, 4 inlet channels mix the gas chamber air feed and to the same a plurality of annular branch gas channel air feeds by same annular, consequently evenly arrange 4 inlet channels along circumference and radian interval each other equals, can make the gas that divides gas channel output on each ring line can be in the more even distribution of circumference, improve the air feed stationarity.

Optionally, the radial portion of the intake chamber 221 also tends to expand radially, and the radial extension portion of each intake passage also gradually expands from inside to outside, and the passage cross-sectional area gradually increases, such as the radial extension portion is flared, tapered, and the like.

Here, the circumferential length of the outer ring line is greater than the circumferential length of the inner ring line, and if the flame intensity of the fire hole rings corresponding to the inner and outer ring lines is to be maintained in a close range, the required gas quantity is greater because the number of the fire holes corresponding to the outer ring line is generally greater than the number of the fire holes corresponding to the inner ring line, so that the expanding structure can increase the cross-sectional area of the channel located radially outside the radially extending portion to increase the gas quantity corresponding to the outer ring line.

In some embodiments, the dividing member 222 has a shape of "7", and one "7" shaped dividing member 222 is disposed in the intake chamber 221 to divide two or more intake passages.

Optionally, a "7" -shaped partition member 222 is disposed inside the "7" -shaped intake cavity 221 in a conformal manner, and divides the radial portion and the circumferential portion of the intake cavity 221 into two parts, so as to partition and form two "7" -shaped intake channels. As shown in fig. 1, a 7-shaped partition member 222 is provided at a circumferential portion of the intake chamber 221 in a lateral direction and at a radial portion of the intake chamber 221 in a vertical direction, thereby partitioning two intake passages.

Optionally, the passage centre line of the radially extending portion of the inlet passage is an arc or a straight line.

Optionally, the partition member 222 is a partition rib plate, which is vertically disposed in the intake chamber 221. The volume of the partition member 222 in the intake chamber 221 is reduced, increasing the intake air amount.

Alternatively, the upper end surface of the vertically arranged partition member 222 is flush with the end surface (upper end surface) of the intake chamber 221. The sealing performance of each air inlet channel constructed after the lower air distribution plate 210 is connected with the upper air distribution plate 290 is improved.

In the embodiment of the present disclosure, in the lower gas distribution plate 210, the communication manner between the gas inlet partition member 220 and the annular gas inlet groove on the lower plate 211 is not limited, as long as the communication is realized, and the circulation of the gas is ensured. For example, an intake port communicating with the intake passage is provided on the disc wall 2111 corresponding to each annular intake groove. As shown in fig. 3 for the middle ring intake 2021 and the outer ring intake 2031.

In some embodiments, the bottom wall of the intake partition member 220 is disposed on the tray wall 2111 of the lower tray body 211, and the tray wall 2111 and the bottom wall at a position where the intake passage overlaps the annular intake groove are opened with an intake port communicating therewith.

Optionally, the air inlet of the radial extension part of the air inlet channel is configured to be an arc-shaped concave structure capable of smoothly transiting with the annular air mixing cavity, so as to reduce the path resistance of the gas flowing from the annular air mixing cavity to the air distribution disk, and improve the smoothness of the gas entering.

In some embodiments, the tray wall 2111 of the lower tray 211 is curved, and is inserted into a portion of the curved tray wall 2111 such that the bottom wall of the intake partition member 220 opposes the convex wall surface of the tray wall 2111 of the lower tray 211, such that the end surface of the intake chamber 221 of the intake partition member 220 is flush with the center of the convex wall surface of the curved tray wall 2111; and the annular structural part interfering with the air inlet channel is removed, and one air inlet channel is ensured to be communicated with only one annular air inlet groove.

In some embodiments, the circumferential extension is connected to the outer end of the radial extension of the same corresponding intake channel and is formed to extend along a circumferential line, wherein the circumferential extension is generally the part of the short side section of the aforementioned 7-shaped intake channel. This circumference extension corresponds the setting with the branch gas channel position, also the circumference line that circumference extension belongs to rather than the branch gas channel place ring line collineation that corresponds for circumference extension can be at least to its branch gas channel that corresponds the intercommunication carry the gas, and circumference extension can increase inlet channel and divide the circumference butt joint bore area between the gas channel, and then accelerates inlet channel's radial extension's gas outflow rate.

It should be understood that the structural form of the intake passage indicated by the letter "7" in the foregoing does not relate to the definition of the length between the radial extension and the circumferential extension, i.e. the length of the radial extension may be greater than, less than or equal to the length of its corresponding circumferential extension.

Optionally, part of the adjacent circumferential extension portions located on the same circumferential line are communicated with each other, so that the gas from one gas inlet channel can be conveyed to the circumferential extension portion of another gas inlet channel through the circumferential extension portions, the overall length of the circumferential extension portions can be effectively increased, the gas conveying efficiency to the gas distribution channels is improved, and meanwhile, the uniformity of gas circumferential gas outlet can be further improved.

As shown in connection with fig. 4-12, embodiments of the present disclosure provide a second type of gas panel, including a lower gas panel 210 and an upper gas panel 290, the lower gas panel 210 having one or more first gas entry subsections 230; the upper gas distribution plate 290 includes gas distribution channels in different circular lines from inside to outside, and some or all of the gas distribution channels in non-adjacent circular lines communicate with one or more first gas inlet partitions 230.

The second class of minute gas dish of this disclosed embodiment, through the setting of the first subregion 230 that admits air on the minute gas dish 210 down for the gas that gets into by an air inlet on the minute gas dish 210 down can be shunted to the branch gas passageway on the different circular lines on the minute gas dish 290, has enlarged the branch gas area of gas, has increased the variety of the mode of putting out a fire, has increased heating area's flexibility, can satisfy multiple culinary art demands, for example, fry in shallow oil, cook etc. and heat the scene.

In some embodiments, the air intake portion of the air distribution plate includes at least a first air intake passage 231 and a second air intake passage 232 formed in the lower air distribution plate 210; accordingly, the gas distribution portion includes at least a first gas distribution channel 205, a second gas distribution channel 206, and a third gas distribution channel 207 formed in the upper gas distribution plate 290. The first air distribution channel 205 and the third air distribution channel 207 are communicated with the first air inlet channel 231, and the second air distribution channel 206 is communicated with the second air inlet channel 232, so that the combustion states of the fire hole rings corresponding to the first air distribution channel 205 and the third air distribution channel 207 can be uniformly controlled by the air supply flow path corresponding to the first air inlet channel 231, the combustion states of the fire hole rings corresponding to the second air distribution channel 206 can be controlled by the air supply flow corresponding to the second air inlet channel 232, and the two air distribution channels are independent of each other.

Therefore, when the gas flow of each air inlet channel is changed, the gas amount of the corresponding gas distribution channel and the gas amount of the corresponding fire hole ring can be synchronously changed, and meanwhile, the fire hole rings corresponding to the same air inlet channel (such as the first air inlet channel 231) are respectively positioned at different internal and external heating positions in a loop mode, so that the synchronous adjustment of firepower at a plurality of internal and external different heating positions can be simultaneously realized by adjusting the gas flow of a single air inlet channel, the heating uniformity can be effectively improved, and the complexity of operation is reduced.

Optionally, as shown in fig. 4 and 6, the number of the first air intake channels 231 and the second air intake channels 232 is multiple and the first air intake channels 231 and the second air intake channels 232 are arranged in groups in a one-to-one correspondence manner; the first inlet channel 231 of multiunit and the second inlet channel 232 are evenly arranged along circumference according to equal radian interval for the gas that divides the gas channel output on each loop can be more even distribution in circumference, improves the air feed stationarity.

Alternatively, as shown in fig. 8, the number of the first intake passages 231 is plural, and the number of the second intake passages 232 is plural; the first air inlet channels 231 and the second air inlet channels 232 are alternately arranged along the circumferential direction, in the embodiment shown in fig. 8, the number of the first air inlet channels 231 and the number of the second air inlet channels 232 are respectively 2, 4 air inlet channels are arranged on the lower air distribution plate 210 of the air distribution plate in a cross shape, the two first air inlet channels 231 are symmetrically arranged, and the two second air inlet channels 232 are also oppositely arranged.

Optionally, the first air inlet channel 231 and the second air inlet channel 232 are in a channel structure which gradually expands from inside to outside and gradually increases in channel cross-sectional area.

In some embodiments, the first air inlet channel 231 supplies air to the first air distribution channel 205 and the third air distribution channel 207 simultaneously, and the number of the air distribution channels corresponding to the air supply is greater than that of the second air inlet channel 232, so that in order to guarantee the flame intensity of the fire hole rings corresponding to the first air distribution channel 205 and the third air distribution channel 207 respectively, the expansion amplitude of the first air inlet channel 231 is greater than that of the second air inlet channel 232, so as to adapt to the larger gas flow requirement of the first air inlet channel 231.

In some embodiments, the lower air distribution plate 210 includes a lower plate body 211 and a first partition rib 240. A penetrating inner annular member 212 (forming the inner ring intake port 201) is provided at the center of the first disk surface of the lower disk body 211, and a plurality of annular intake grooves surrounding the inner annular member 212 are provided on the second disk surface. The first separating rib 240 has a first arc segment 241 and a first straight segment 242, and the two ends of the first arc segment 241 are respectively provided with the first straight segment 242; the first partition rib 240 is disposed on the first plate surface of the lower plate 211. The ends of the first straight segment 242 are connected to the inner annular member 212; the area between the first partition bead 240 and part of the inner annular member 212 forms the first intake partition 230; the first intake partition 230 communicates with an annular intake slot.

In this embodiment, the first partition rib 240 is used to partition the lower gas distribution plate 210 into the first gas inlet partition 230, so that the gas distribution channels on the non-adjacent circular lines are communicated with the first gas inlet partition 230, and the gas/premixed gas introduced into one annular gas inlet groove can flow into the gas distribution channels on the non-adjacent circular lines through the corresponding gas inlet channels, thereby realizing one-to-many gas distribution and increasing the flexibility of gas distribution. The first intake partition 230 is generally fan-shaped in shape.

Optionally, the first intake partition 230 communicates with the inner annular intake slot.

In some embodiments, the lower disc 211 further comprises a plurality of annular members, which are disposed on the second disc surface of the lower disc 211 from inside to outside by taking the inner annular member 212 as a center, so as to form a plurality of annular air inlet grooves. In this embodiment, a plurality of annular air inlet grooves disposed on the second plate surface of the lower plate 211 are butted with the air outlet of the burner to receive the gas/premixed gas. The number of the annular air inlet grooves is determined according to actual requirements.

Optionally, the number of annular inlet slots is 2. As shown in fig. 5 and 9, the inner annular member 212 is centered, the middle annular member 213 and the outer annular member 214 are concentrically disposed on the second disk surface from inside to outside in this order, and the inner ring intake port 201, the middle annular intake groove 202, and the outer annular intake groove 203 are formed on the lower disk body 211.

Optionally, first intake partition 230 communicates with intermediate annular intake slot 202. The gas distribution area is enlarged.

In the disclosed embodiment, the inner annular member 212, the middle annular member 213, and the outer annular member 214 are each a circular ring member having a certain height. The height of each annular member may be different, depending on the actual configuration. Optionally, the inner annular member 212 is at the same height as the outer annular member 214 above the first disc surface of the lower disc 211 such that the connecting end surface of the lower gas-distributing disc 210 is planar. Optionally, the height of the annular member located on the outer side of the second disk face is greater than the height of the annular member located on the inner side. As shown in fig. 5 and 9, the outer annular member 214 has a height greater than the height of the middle annular member 213.

Optionally, the first separating rib 240 includes a first separating rib 240 i and/or a first separating rib 240 ii. The first separating rib 240 i is an arc line with a first arc line segment 241 being greater than or equal to a semicircular arc, and the first separating rib 240 ii is an arc line with a first arc line segment 241 being less than a semicircular arc.

Optionally, the number of the first separating ribs 240 is one or more, when the number of the first separating ribs 240 is multiple, the plurality of first separating ribs 240 are arranged around the inner annular member 212 at intervals, and the first arc segments 241 of the plurality of first separating ribs 240 are located on the same ring line.

In the embodiment of the present disclosure, the shape and the number of the first partitioning ribs 240 are not limited, and may be determined according to the division of the lower air-distributing tray 210 into one or more first air-intake partitions 230.

Optionally, the first separating rib 240 includes a first separating rib 240 i. In this embodiment, the number of the first partition ribs 240 is one, and the lower gas distribution plate 210 is divided into the first gas inlet partitions 230. Optionally, the central angle of the first arc segment 241 of the first separating rib 240 i is 120 ° to 180 °. Optionally, the central angle of the first arc segment 241 of the first separating rib 240 i is 140 ° to 160 °. Alternatively, the first arc segment 241 of the first separating rib 240 i has a central angle of 150 °.

Optionally, the first separating rib 240 includes a first separating rib 240 ii. In this embodiment, the number of the first separating ribs 240 ii is 2, 3, 4 or more, and the uniform air intake is only required. Alternatively, as shown in fig. 8, the first partition ribs 240, the number of which is 2, are symmetrically disposed around the inner ring member 212. As shown in fig. 4 and 10, the first partition ribs 240 are 4 in number and are uniformly provided around the inner ring member 212.

Optionally, the first separating rib 240 includes a first separating rib 240 i and a first separating rib 240 ii. In this embodiment, there is one first separating rib 240 i and a plurality of first separating ribs 240 ii. The central angle of the first separating rib 240 i is 90 ° to 120 °. The first separating ribs 240 ii are disposed between two first straight lines 242 of the first separating ribs 240 i.

In some embodiments, the lower gas distribution plate 210 further includes a second partition rib 250 having a second arc segment 251 and a second straight segment 252, wherein the second straight segment 252 is disposed on a first end of the second arc segment 251; the second partition rib 250 is disposed in the first air intake partition 230, and the second end of the second arc segment 251 is connected to the first straight segment 242 of the first partition rib 240, and the end of the second straight segment 252 is connected to the inner annular member 212; a first air intake passage 231 is formed between the outer side of the second partitioning rib 250 and the first partitioning rib 240; the first air intake passage 231 communicates with the annular air intake groove on the inner side.

In this embodiment, the second separating rib 250 is shaped like a "7", the second arc segment 251 is disposed along the circular line of the lower gas distribution plate 210, and the second straight segment 252 is not limited to be disposed along the radial direction of the lower gas distribution plate 210. Then, the second partition rib 250 shaped like a letter "7" is buckled on the first straight line segment 242 of the first air intake partition 230 shaped like a sector as a whole, and the formed first air intake passage 231 includes the first radial air intake portion 2311 and the first circumferential air intake portion 2312 which are communicated with each other. Also, the number of the second partition ribs 250 may be one or two.

Alternatively, as shown in fig. 4 and 10, if the number of the second separating ribs 250 provided in each first separating rib 240 is one, the second ends of the second arc-shaped line segments 251 are connected to the second side first straight line segments 2422 of the first separating ribs 240, the second straight line segments 252 are close to the first side first straight line segments 2421 of the first separating ribs 240 to form the first radial air inlet portions 2311, and the first circumferential air inlet portions 2312 are formed between the second arc-shaped line segments 251 and the first arc-shaped line segments 241 of the first separating ribs 240. In the present embodiment, the first intake passage 231 has a 7-shape.

Optionally, as shown in fig. 8, the number of the second separating ribs 250 arranged in each first separating rib 240 is two, the second ends of the second arc segments 251 of the two second separating ribs 250 are respectively connected to the first straight segments 242 on both sides of the first separating rib 240, the second arc segments 251 of the two second separating ribs 250 are located on the same circular line, and a first circumferential air inlet portion 2312 is formed between the second arc segments 251 of the two second separating ribs 250 and the first arc segments 241 of the first separating rib 240; the second straight sections 252 have spaces therebetween to form first radial air intake portions 2311. In the present embodiment, the first intake passage 231 has a "T" shape.

In some embodiments, an end of the first straight line segment 242 of the first partition rib 240 for forming the first air intake channel 231 is bent to form a first bent segment 243, and the first bent segment 243 is connected with the adjacent first straight line segment 242; a communication port is formed on the lower disc body 211 between the inner annular member 212 and the first bending section 243 and is communicated with the inner annular air inlet groove. In this embodiment, an arc-shaped channel is formed between the first bending section 243 and the inner annular member 212, the arc-shaped channel corresponds to the inner annular air inlet groove (e.g., the middle annular air inlet groove 202), and a communication port is formed on the arc-shaped channel to form the middle annular air inlet 2021. Compared with the structure in which the end of the first straight line segment 242 is not bent as shown in fig. 7, the intake area of the middle ring intake port 2021 is increased, and the intake air amount is increased.

As shown in fig. 4 and 5, the lower air distribution plate includes 4 first partition ribs 240, and one second partition rib 250 is disposed in each first partition rib 240, wherein the first side first straight line part 2421 and the second partition rib 250 form a first radial air inlet portion 2311 of the first air inlet channel 231. Therefore, the end of the first side first straight line part 2421 of one of the first separating ribs 240 is bent to form a first bent section 243, and the first bent section 243 is connected with the adjacent first straight line part 242 (e.g., the second side first straight line part 2422 of the adjacent other first separating rib 240).

Optionally, the first intake passage 231 communicates with the middle annular intake groove 202. Alternatively, the first radial intake portion 2311 of the first intake passage 231 communicates with the intermediate annular intake groove 202. The gas distribution area is increased.

In the embodiment of the present disclosure, the first partition rib 240 partitions the first disk surface of the lower disk 211 into two regions, one of which is the aforementioned first intake partition 230, and the other of which is defined as a second intake partition. The first air inlet partition 230 is communicated with part or all of the air distribution channels which are not adjacent to the circular line, and the rest air distribution channels are communicated with the second air inlet partition, so that air supply of all the air distribution channels on the upper air distribution plate 290 is realized.

In some embodiments, lower plate 210 further comprises one or more second intake subsections having second intake passages 232 configured therein; the second intake passage 232 communicates with a part of the gas distribution passage of the upper gas distribution plate 290. In this embodiment, the second air intake passage 232 is configured to guide intake air to a set partial air distribution passage, so that the flexibility of air distribution is further improved.

Optionally, when the lower gas distribution plate 210 includes the first partition rib 240, the lower gas distribution plate 210 further includes a third annular partition rib 260, which is surrounded on the outer side of the first partition rib 240; the region between the first partition bead 240 and the third annular partition bead 260 forms the second air intake passage 232; and the second intake passage 232 includes the second radial intake portion 2321 and the second circumferential intake portion 2322 that communicate. The second air inlet passage 232 is communicated with the annular air inlet groove on the outer side to be connected with fuel gas. In this embodiment, a second circumferential air intake portion 2322 is disposed between the plurality of first arc segments 241 and the third annular separating rib 260, a second radial air intake portion 2321 is formed between two adjacent first straight segments 242 (which may be two adjacent straight segments 242 of different first separating ribs 240, or two first straight segments 242 of one first separating rib 240), and according to the number of the first separating ribs 240, the second radial air intake portion 2321 may be one or more, so as to increase the number of air intake ports, improve the air intake amount, and further improve the uniformity of air intake.

Optionally, when the number of the first separating ribs 240 is multiple, a partition plate is radially disposed between the first arc segment 241 and the third annular separating rib 260 of each first separating rib 240 to divide the second circumferential air inlet 2322 into multiple sections, and each section of the circumferential air inlet is communicated with one second radial air inlet 2321. A plurality of second intake passages 232 are formed.

Optionally, the second inlet passage 232 communicates with the outer annular inlet groove 203. Optionally, the second radial inlet 2321 of the second intake passage 232 communicates with the outer annular inlet slot 203. The gas distribution area is increased.

In the embodiment of the present disclosure, depending on whether the air supplement channel 270 is provided, a third type of air distribution plate is further provided, as shown in fig. 4 to 12, including a lower air distribution plate 210 and an upper air distribution plate 290, where the lower air distribution plate 210 has one or more first air intake partitions 230, and a partition structure for partitioning the first air intake partitions 230 into a first air intake channel 231 and an air supplement region is provided in the first air intake partition 230; the upper gas distribution plate 290 includes gas distribution channels in different circular lines from inside to outside, and some or all of the gas distribution channels in non-adjacent circular lines communicate with one or more first gas inlet partitions 230.

In the third type of air distribution plate according to the embodiment of the present disclosure, an air supplement region is provided on the lower air distribution plate 210 for supplementing air to improve the combustion rate of the fuel gas. In this embodiment, the upper air-distributing plate 290 is provided with an air supplement inlet structure at a position corresponding to the air supplement region, and air supplement is completed in cooperation with the air supplement inlet structure.

In some embodiments, the third type of lower gas distribution plate 210 includes a lower plate body 211, a first partition rib 240, and a second partition rib 250. A penetrating inner annular member 212 is disposed at the center of the first disk surface of the lower disk 211, and a plurality of annular intake grooves surrounding the inner annular member 212 are disposed on the second disk surface. The first separating rib 240 has a first arc segment 241 and a first straight segment 242, and the two ends of the first arc segment 241 are respectively provided with the first straight segment 242; the first partition rib 240 is disposed on the first plate surface of the lower plate 211. The ends of the first straight segment 242 are connected to the inner annular member 212; the area between the first partition bead 240 and part of the inner annular member 212 forms the first intake partition 230; the first intake partition 230 communicates with an annular intake slot. The second separating rib 250 is provided with a second arc line segment 251 and a second straight line segment 252, and the first end of the second arc line segment 251 is provided with the second straight line segment 252; the second dividing rib 250 is disposed in the first air intake partition 230, and the second end of the second arc segment 251 is connected to the first straight segment 242 of the first dividing rib 240, and the end of the second straight segment 252 is connected to the inner annular member 212; the second partition rib 250 partitions the first intake partition 230 into the independent first intake passage 231 and the air supplement region; an air supplement inlet 271 is formed on the lower plate 211 of the air supplement region.

That is, the third type air distribution plate is based on the second type air distribution plate, the area enclosed by the partial first straight line 242 of the first separating rib 240 and buckled by the second separating rib 250 is limited as the air supplement area, the lower plate body 211 of the area is provided with the air supplement inlet 271, the air supplement outlet arranged on the upper air distribution plate 290 is matched, and an air channel is formed between the air supplement inlet 271 and the air supplement outlet, so that the air entering from the air supplement inlet 271 flows out from the air supplement outlet and is mixed with the gas for combustion, the air quantity is increased, and the combustion efficiency is improved.

In the third type gas distribution plate according to the embodiment of the present disclosure, the structural content of the same component as that of the second type gas distribution plate refers to the related content of the second type gas distribution plate, and is not described herein again.

Optionally, an air make-up inlet 271 is provided outside the annular inlet slot of the lower disc 211. The air is introduced into the inner side of the air distribution plate from the outside, and the combustion efficiency is improved.

In some embodiments, the ends of the first straight segments 242 of the first separating ribs 240 used to form the air supplement regions are bent to form second bent segments 244, and the second bent segments 244 are connected with adjacent first/second straight segments 242/244; an air outlet-side passage 274 is formed between the inner annular member 212 and the second bend 244. In this embodiment, the air outlet side passage 274 communicates with the air supplement inlet 271 of the air supplement region to form an air passage, so that air can be introduced between the inner ring fire and the middle ring fire/the middle ring fire and the outer ring fire, and the air supplement amount can be increased to improve the combustion efficiency.

In the present embodiment, the manner of forming the air outlet-side passage 274 and the structure formed are different for different numbers of arrangement of the second partitioning ribs 250.

Alternatively, as shown in the lower gas distribution plate of fig. 8, two second partition ribs 250 are provided in each of the first partition ribs 240. The first straight line sections (2421, 2422) on the two sides of the first separating rib 240 are respectively buckled with one second separating rib 250 to form an air supplementing area; the ends of the first straight line sections (2421, 2422) on both sides are bent outward to form the second bent sections 244, the two second bent sections 244 are connected to form one integral second bent section 244, and the air outlet side passage 274 is formed between the integral second bent section 244 and the inner annular member 212. The air make-up is increased.

Alternatively, referring to a lower gas distribution plate shown in fig. 7, a second partition rib 250 is provided in each of the first partition ribs 240. The second side first straight line part 2422 of the first separating rib 240 is buckled with the second separating rib 250 to form an air supplementing area; the second bent section 244 may be formed by bending an end portion of the second side first straight line section 2422 outward and connected to the first side first straight line section 2421 of the adjacent other first partition rib 240, and the air outlet side passage 274 may be formed between the second bent section 244 and the inner ring member 212. The air make-up is increased.

In some embodiments, as shown in fig. 11, the lower air distributor 210 further comprises an air deflector 280 disposed at the air make-up inlet 271 for directing the air flow. In this embodiment, the structure and the arrangement of the air deflector 280 are not limited as long as the air deflector can guide the air to flow between different air distribution channels of the upper air distribution plate 290.

Optionally, the air deflector 280 includes an arc deflector 281, and the arc deflector 281 is disposed at the air supplement inlet 271 along the ring shape of the lower disk 211 in such a manner as to be inclined from the outside to the inside. And air outside the air distribution plate is guided to the inside. In this embodiment, the arc deflector 281 of the air deflector 280 is concentrically disposed with the annular members of the lower disk 211 and is located outside the plurality of annular members.

Optionally, a curved baffle 281 is provided on the inside edge or radially mid-way of the air make-up inlet 271; when the arc flow guide 281 is provided in the middle of the air replenishment inlet 271 in the radial direction, the air replenishment inlet 271 is divided into the inner air replenishment inlet 271 and the outer air replenishment inlet 271. The gas-supplying device is used for supplying air for the gas on the inner gas-distributing channel and the outer gas-distributing channel respectively, and improves the combustion effect.

Optionally, an arc deflector 281 is disposed at the middle of the air supplement inlet 271 in the radial direction, and the upper end edge of the arc deflector 281 extends upward to be flush with the upper end edge of the first partition rib 240; the lower end extends downwards to a height not exceeding the height of the outer annular member. So that the air replenishment inlet 271 is partitioned into the inner air replenishment inlet 271 and the outer air replenishment inlet 271.

Optionally, a curved baffle 281 is provided on the inside edge of the air make-up inlet 271, and the curved baffle 281 extends downwardly to a height corresponding to the height of the outside annular member. The drainage function is realized, and meanwhile, the drainage device is matched with an annular component on the outer side to play a certain supporting role.

Optionally, the arc deflector 281 is formed to extend along the outer circumference of the middle ring member.

In the above embodiment, "height" refers to a height from the second plate surface of the lower plate body 211.

Optionally, the air deflector 280 further includes a straight plate 282 radially outwardly extended and disposed on the second disk surface of the lower disk body 211 and having one end connected to both ends of the arc deflector 281, and the outer end of the straight plate extends to the outer peripheral side of the air-dividing disk. For embodiments in which the curved baffle 281 is disposed in a radially intermediate portion of the air make-up inlet 271, the provision of the straight plate 282 circumferentially separates the underside of the lower disk 211 into an inboard air inlet passage 272 corresponding to the second air make-up passage and an outboard air inlet passage 273 corresponding to the first air make-up passage. The two straight plates 282 at either end of one arc deflector 281 define an outside air inlet passage 273 therebetween and the two straight plates 282 at the adjacent ends of two adjacent arc deflectors 281 define an inside air inlet passage 272 therebetween. Promoting the stability and uniformity of the air flow.

Optionally, the outside of straight board is provided with conical reinforcement floor, and reinforcement floor can increase straight board self anti-deformation strength to its life is prolonged.

Optionally, the air deflector and the air distribution plate are of an integrally formed structure.

Like the second type air distribution plate, in the third type air distribution plate according to the embodiment of the present disclosure, the first partition rib 240 partitions the first plate surface of the lower plate 211 into two regions, one is the first air intake partition 230, and the other region is defined as the second air intake partition. The first air inlet partition 230 is communicated with part or all of the air distribution channels which are not adjacent to the circular line, and the rest air distribution channels are communicated with the second air inlet partition, so that air supply of all the air distribution channels on the upper air distribution plate 290 is realized.

Thus, in some embodiments, lower gas distributor plate 210 further includes one or more second gas inlet subsections, with second gas inlet passages 232 configured therein; the second intake passage 232 communicates with a part of the gas distribution passage of the upper gas distribution plate 290. In this embodiment, the second air intake passage 232 is configured to guide intake air to a set partial air distribution passage, so that the flexibility of air distribution is further improved. In this embodiment, the structure and implementation structure of the second air inlet channel 232 may refer to the content of the corresponding portion of the second type air distribution plate, and are not described herein again.

In the air distribution plate according to the embodiment of the present disclosure, the upper air distribution plate 290 of the three types of air distribution plates has the same structural form, that is, the upper air distribution plate 290 of each of the embodiments described below can be applied to each of the lower air distribution plates 210 to form one type of air distribution plate.

In some embodiments, as shown in fig. 1 to 11 in combination, the upper gas distribution disk 290 includes an upper disk body 291 and a plurality of annular gas distribution members, and a through hole (as the inner ring gas distribution port 204) is provided in the center of the upper disk body 291; a plurality of annular gas distributing members, each of which is configured with a gas distributing passage, are coaxially disposed from the inside to the outside on a side disk surface (e.g., a second disk surface) of the upper disk body 291. The gas distribution channels of some or all of the non-adjacent annular gas distribution members are communicated with the same gas inlet structure on the lower gas distribution plate 210.

In the embodiment of the present disclosure, the same air inlet structure on the lower air distribution plate 210 is different according to the aforementioned first to third air distribution plates.

Optionally, for the first type of gas distribution plate, the gas distribution channels of some or all of the non-adjacent annular gas distribution members on the upper gas distribution plate 290 are communicated with the same gas inlet channel on the lower gas distribution plate 210. In this embodiment, the same intake passage is either the inner intake passage 2212 or the outer intake passage 2211.

Optionally, for the second type of gas distribution plate, the gas distribution channels of some or all of the non-adjacent annular gas distribution members on the upper gas distribution plate 290 are communicated with the first gas inlet partition 230 on the lower gas distribution plate 210. And, when the lower gas distribution plate 210 includes the second intake passage 232, the gas distribution passages of the remaining annular gas distribution members communicate with the second intake passage 232.

Optionally, for the third type of gas distribution plate, the gas distribution channels of some or all of the non-adjacent annular gas distribution members on the upper gas distribution plate 290 are communicated with the first gas inlet channel 231 on the lower gas distribution plate 210.

In the upper gas distribution plate 290 according to the embodiment of the present disclosure, the other side plate surface (e.g., the first plate surface) of the upper plate body 291 is a connection end surface of the upper gas distribution plate 290 and the lower gas distribution plate 210.

In some embodiments, as shown in FIG. 9 and in diagram 11, the other disk surface of upper disk body 291 is flat. The connecting end face of the lower air distribution plate 210 is also a plane, and the two are fixedly connected after being butted.

In some embodiments, as shown in fig. 2, a fitting member 292 is further disposed on the other side plate surface of the upper plate body 291, and the fitting member 292 is in fitting and abutting joint with the air inlet partition (i.e., the air inlet partition member 220) on the lower air distribution plate 210 to form a plurality of air inlet passages. The air inlet channel sealing performance is improved, and air leakage is prevented.

Optionally, the engagement member 292 includes ribs disposed on the other side plate surface of the upper plate body 291 in a manner to fit with the air distribution structure on the lower air distribution plate 210.

In the first type of air distribution plate shown in fig. 2, the shape of the ribs provided on the other side plate surface of the upper plate body 291 coincides with the shape of the intake partition member 220 on the lower air distribution plate 210 and the partition member 222 provided therein.

Optionally, the engagement member 292 protrudes on the other side of the disk surface of the upper disk body 291. The horizontal position of the upper plate body 291 is properly increased, the sectional area of the air supplement passage 270 is increased, and the air supplement amount is increased.

In the embodiment of the present disclosure, the through hole formed on the upper disk body 291 is an inner ring gas distribution opening 204, which is communicated with the inner ring gas inlet 201 on the lower gas distribution disk 210 to form an inner ring gas channel.

Optionally, an upper inner ring member 293 is disposed on the circumference of the through hole of the upper disc body 291, such that the gas outlet surface of the inner ring gas channel is flush with the upper end surface of each annular gas distribution member. Of course, as shown in fig. 4 and 8, the upper inner ring member 293 may not be provided, and may be determined according to actual requirements.

In the upper gas distribution plate 290 of the embodiment of the present disclosure, the number of the annular gas distribution members is not limited, and may be determined according to actual requirements. In some embodiments, as shown in fig. 1, 8 and 10, the number of the annular gas distribution members is 4, and the upper gas distribution plate 290 is provided with a first annular gas distribution member 294, a second annular gas distribution member 295, a third annular gas distribution member 296 and a fourth annular gas distribution member 297 in sequence from inside to outside, and the first gas distribution passage 205, the second gas distribution passage 206, the third gas distribution passage 207 and the fourth gas distribution passage 208 are correspondingly configured. And part or all of the non-adjacent annular gas distribution components are communicated with the gas inlet structure.

Alternatively, for the first type of air distribution plate, the first air distribution passage 205 and the third air distribution passage 207 are both communicated with the aforementioned inner intake passage 2212, and the second air distribution passage 206 and the fourth air distribution passage 208 are both communicated with the outer intake passage 2211.

Alternatively, for the second type of gas panel, the first gas distribution passage 205 and the third gas distribution passage 207 are both in communication with the aforementioned first gas intake partition 230, and the second gas distribution passage 206 and the fourth gas distribution passage 208 are both in communication with the second gas intake passage 232.

Alternatively, for the third type of gas panel, the first gas distribution passage 205 and the third gas distribution passage 207 are both in communication with the aforementioned first gas intake partition 230, and the second gas distribution passage 206 and the fourth gas distribution passage 208 are both in communication with the second gas intake passage 232.

Optionally, the number of the first gas distribution channels 205 of the same circular line is multiple, and the first gas distribution channels are arranged at intervals along the circumferential direction of the circular line where the first gas distribution channels are located according to a first equal radian; similarly, the number of the second gas distribution channels 206 of the same circular line is multiple, and the second gas distribution channels are also arranged at intervals along the circumferential direction of the circular line where the second gas distribution channels are located according to a second equal radian; similarly, the number of the third air dividing channels 207 on the same circular line is multiple, and the third air dividing channels are arranged at intervals of a third equal radian along the circumferential direction of the circular line on which the third air dividing channels are arranged. Here, the arrangement of the plurality of first gas distribution channels on the same loop line can enable the gas to flow out from a plurality of positions of the loop line simultaneously, so as to improve the uniformity of gas outlet in the circumferential direction of the loop line.

The plurality of first branch air passages 205 and the third branch air passage 207 are arranged in one-to-one correspondence with the plurality of first intake air passages 231; and, the plurality of second branch passages 206 are provided in one-to-one correspondence with the plurality of second intake passages 232.

Optionally, the first radian, the second radian and the third radian may be the same or different.

Optionally, each annular gas distribution member comprises two annular ribs, and the annular channel between the two annular ribs is the gas distribution channel.

In the upper air distribution plate 290 according to the embodiment of the present disclosure, a plurality of annular air distribution members are disposed on a side plate surface (e.g., a second plate surface) of the upper plate body 291 from inside to outside around the through hole, and the plurality of annular air distribution members may be uniformly distributed on the second plate surface in a radial direction or may be non-uniformly disposed on the second plate surface in a predetermined layout.

In some embodiments, the plurality of annular gas distribution members form one or more sets of gas passages in different annular zones of the upper disc body 291 in a manner that two or more annular gas distribution members are adjoined in sequence from inside to outside in a radial direction of the upper gas distribution disc 290 to form one set of gas passages. The same air inlet channel (inner air inlet channel or outer air inlet channel, first type air distribution plate)/first air inlet partition 230 (second type air distribution plate)/first air inlet channel 231 (third type air distribution plate) on the lower air distribution plate 210 is respectively communicated with the inner air distribution channel or the outer air distribution channel in each group of air channels. In this embodiment, divide the integration of gas channel, simplified the quantity of fire lid, set up a fire lid on a set of gas channel, according to the branch gas channel quantity on this group of gas channel, it can to set up the fire hole ring of the equal quantity on corresponding fire lid.

In this embodiment, the ring area of the upper plate 291 may be set according to the heating area. The ring zone is divided into an inner ring zone, a middle ring zone and an outer ring zone. The first and second

gas distribution passages

205 and 206 are adjoined to form a set of middle ring gas passages in the middle ring area, and the third and fourth

gas distribution passages

207 and 208 are adjoined to form a set of outer ring gas passages in the outer ring area. That is, when only the middle annular intake groove 202 of the lower air distribution plate 210 is supplied with air, the gas can be delivered to the first air distribution passage 205 and the third air distribution passage 207 via the inner side intake passage 2212/the first air intake partition 230/the first intake passage 231 of the intake partition member 220, expanding the air distribution area. Wherein, the inner ring gas channel is a gas channel of the inner ring area.

In the embodiment of the present disclosure, an air supplement outlet is further disposed on the upper disk body 291 of the upper air distribution disk 290, especially for the first air distribution disk and the third air distribution disk. So as to introduce air into the interior during combustion and improve combustion efficiency. The position and shape of the air supply outlet are not limited, and the air supply outlet may be designed in combination with the air supply inlet 271/air passage on the lower air distribution plate 210.

In some embodiments, the air supplement outlets include an inner air supplement outlet 275, the inner air supplement outlet 275 disposed between the through hole of the upper disk 291 and the inner first annular air distribution member (first annular air distribution member 294), and communicating with the air supplement inlet 271/air supplement channel 270 configured on the lower air distribution disk 210.

In some embodiments, the air supplement outlets further include an outer air supplement outlet 276 disposed on the upper disc body 291 between adjacent annular air distribution members and corresponding to the air supplement inlet 271 disposed on the lower air distribution disc 210.

In this embodiment, after the upper air-distributing plate 290 is butted against the lower air-distributing plate 210, the inner air supplement outlet 275 and the outer air supplement outlet 276 can be communicated with the same air supplement channel 270 (as shown in fig. 1, 4 and 8); or may communicate with a different air make-up passage 270.

As shown in fig. 10, for the third class of air-separation discs, the inboard air supplement outlet 275 communicates with the inboard air inlet passage 272 and the outboard air supplement outlet 276 communicates with the outboard air inlet passage 273.

Alternatively, the air supplement outlets are disposed on different circumferential lines of the upper plate 291, and a plurality of air supplement outlets on the same circumferential line are uniformly distributed.

Alternatively, the inside air supplement outlet 275 is provided on a loop line between the through hole of the upper disc 291 and the inside first annular air distribution member.

Optionally, an outside air replenishment outlet 276 is provided on the lower disc 211 between the second air distribution passage 206 and the third air distribution passage 207.

In the embodiment of the present disclosure, the shape of the air replenishment outlet is not limited, and the air replenishment outlet is provided based on the maximum communication between the installation position of the air replenishment outlet and the air passage, thereby increasing the air replenishment amount.

Optionally, the inside air supplement outlet 275 is provided in a triangular shape.

Alternatively, the outside air supplement outlets 276 are arranged in an arc along a circular line.

Of course, in the upper air distribution disc 290 of the embodiment of the present disclosure, an air outlet structure for communicating with the air inlet channel is provided on the upper disc body 291 in the air distribution channel of each annular air distribution member, and the air outlet is communicated with the inner air inlet channel 2212/the first air inlet partition 230/the first air inlet channel 231 or the second air inlet channel 232/the outer air inlet channel 2211 of the air distribution channel where the air outlet is located. The number and the shape of the arrangement are not limited and can be determined according to actual needs. According to the gas distribution channels, the gas outlets are respectively defined as a first gas outlet 2901, a second gas outlet 2902, a third gas outlet 2903 and a fourth gas outlet 2904, the first gas outlet 2901 is arranged in the first gas distribution channel 205, the second gas outlet 2902 is arranged in the second gas distribution channel 206, the third gas outlet 2903 is arranged in the third gas distribution channel 207, and the fourth gas outlet 2904 is arranged in the fourth gas distribution channel 208.

Optionally, the air outlets are arranged on the lower tray body 211 in the air distribution channel along the shape, and the air outlets in the same air distribution channel are uniformly arranged along the circumferential direction. The uniformity of giving vent to anger is improved. In this embodiment, on the premise of ensuring the structural strength of the upper air distribution plate 290 and satisfying the air output, the circumferential length of the air outlet is as large as possible, and the air output is increased.

Alternatively, the length of the air outlet in the circumferential direction on the air distribution passage on the outer side is greater than the length of the air outlet in the circumferential direction on the air distribution passage on the inner side in the radial direction. The gas distribution amount on the outer side gas distribution channel is improved, and the heating efficiency of the outer side gas distribution channel is improved.

Optionally, a slope structure 298 is disposed at the same side edge in the circumferential direction of the plurality of air outlets on the same air distribution channel. The gas can be promoted to flow in the same direction after entering the gas distribution channel, and the gas outlet stability is improved.

In some embodiments, the upper gas-distributing disk 290 includes a disk-shaped body (like the upper disk 291) configured with a through-going hole and a plurality of gas outlets; the plurality of gas distribution ports are distributed on different circular lines of the disc-shaped body to form gas distribution channels. Such as the upper gas distribution plate 290 shown in fig. 4 and 5. Simple structure and simple forming.

In some embodiments, for the second type gas distribution plate and the third type gas distribution plate, the second circumferential inlet 2322 of the second inlet channel 232 of the lower gas distribution plate 210 and the outermost annular gas distribution member (the fourth annular gas distribution member 297) of the upper gas distribution plate 290 are correspondingly arranged to make the outer circumferential surfaces of the gas distribution plates flush, so as to facilitate sealing connection, and facilitate fitting with other structural members of the combustor, and the like.

Alternatively, the first circumferential air intake portion 2312 of the first air intake passage 231 of the lower air distribution plate 210 is provided corresponding to the annular air distribution member (third annular air distribution member 296) on the secondary outer side of the upper air distribution plate 290.

In this embodiment, the remaining annular gas distribution members may be disposed so long as they have an overlapping area with the inner inlet passage 2212, the first inlet partition 230, the first inlet passage 231, or the outer inlet passage 2211, the second inlet passage 232, which are correspondingly communicated with each other, and an outlet structure is opened in the upper plate 291 of the overlapping area to communicate with each other.

In the embodiment of the present disclosure, the corresponding positions of the lower gas distribution plate 210 and the upper gas distribution plate 290 are further provided with a yielding structure for arranging structural members such as the injection pipe 320, the ignition needle, the thermocouple, and the like. The yielding structure can be a yielding hole or a yielding notch. The specific arrangement position of the abdicating structure is determined according to the positions of structural components such as the injection pipe 320, the ignition needle and the thermocouple arranged on the furnace end. A plurality of fixing holes are also formed for fixedly connecting the bolts of the upper air distribution plate 290 and the lower air distribution plate 210, and the fixing holes comprise circular holes.

In the embodiment of the present disclosure, the air inlet partition on the lower air distribution plate 210 is different in structure in each type of air distribution plate, and the adopted upper air distribution plate 290 is universal, that is, the structure of the upper air distribution plate 290 shown in fig. 4 is also suitable for the lower air distribution plates 210 of other types to form a plurality of air distribution plates.

Further, in order to realize the characteristics of stable air supply, uniform heating and diversified fire discharging forms of the burner in the present embodiment, an air supply structure for the burner is also provided, and fig. 19 shows a schematic structural diagram of the air supply structure, which includes an air inlet assembly 400, a burner assembly 300 and an air distribution assembly 200. The burner assembly 300 is disposed between the air inlet assembly 400 and the air distribution assembly 200, and is configured to homogenize and pressurize external fuel gas introduced by the air inlet pipe 410 and input the pressurized external fuel gas into an air inlet channel of the air distribution assembly 200. The gas distribution assembly 200 is disposed on the burner assembly 300 to distribute the gas introduced into the burner into the combustion gas path corresponding to the fire cover.

Here, the external gas enters the corresponding gas mixing cavity 310 in the burner assembly 300 through different gas inlet pipes 410, and after being uniformly mixed in the annular gas mixing cavity, the gas is rectified through the gas inlet passage 2001 of the gas distribution assembly 200 and enters the communicated gas distribution passage 2002 to supply gas for the independent gas path corresponding to the gas distribution passage 2002 on the burner.

Here, the number of the annular air mixing chambers 310 corresponds to the number of the air inlet pipes 410, and the air inlet pipes 410 for supplying air to the same air distribution passage 2002 have air inlet ends communicating with the same annular air mixing chambers 310.

Alternatively, in combination with the annular air mixing chamber in the above embodiment, here, the first annular air mixing chamber 301 communicates with the first air intake pipe 401, the second annular air mixing chamber 302 communicates with the second air intake pipe 402, and the central annular air mixing chamber 303 communicates with the central air intake pipe 403. Thereby, a corresponding communication of the burner assembly 300 with the air intake assembly 400 is achieved.

As shown in fig. 15 and 16, the gas distribution assembly 200 includes gas inlet passages 2001 and gas distribution passages 2002, and at least one of the gas inlet passages 2001 is communicated with the gas distribution passages 2002 located in non-adjacent circular lines; an intake assembly 400 including a switching device 420 and an intake pipe 410 provided in correspondence with an intake passage 2001; the switching device 420 is used for controlling the conducting state and/or the intake air flow rate of the intake pipe 410 to adjust the combustion state of each gas distribution passage 2002 on the corresponding independent gas path of the burner.

Here, the air inlet assembly 400 delivers the external fuel gas to the air inlet channel of the gas distribution assembly 200, and the gas distribution assembly 200 rectifies the fuel gas and then feeds the rectified fuel gas into the communicated gas distribution channels to supply the gas to the independent gas paths corresponding to the gas distribution channels on the burner.

By adopting the air supply structure provided by this embodiment, the partial or all non-adjacent circular lines of the air distribution assembly 200 are communicated with the same air inlet channel, and the air inlet pipe 410 corresponding to the air inlet channel is provided with the switching device 420, so that at least one air inlet pipe 410 can respectively supply air to the non-adjacent circular lines of the air distribution channels through the air inlet channel to adjust the combustion state of the air path corresponding to the air distribution channel on the burner. So, when a plurality of intake pipes 410 are in different states, realize balanced air feed to a certain extent through a plurality of gas distribution channels with the intake pipe 410 intercommunication of same conducting state for the heat can evenly distributed, thereby effectively improve the heating homogeneity, reduce the loaded down with trivial details nature of operation, and realize that the gas-cooker goes out the variety change of form of firing.

FIGS. 17-19 are schematic diagrams of three air supply configurations for supplying air to a burner provided by embodiments of the present disclosure; referring to fig. 16 and 17 to 19, in the embodiment of the present disclosure, the air supply structure is mainly divided into three types according to the communication relationship between the air intake passage 2001 and the air distribution passage 2002.

According to the first type of gas supply structure provided by the embodiment of the present disclosure, the gas distribution assembly 200 includes a first gas inlet channel 231, a second gas inlet channel 232, and a first gas distribution channel 205, a second gas distribution channel 206, and a third gas distribution channel 207 located on different circular lines from inside to outside; the first air intake passage 231 communicates with the first branch air passage 205 and the third branch air passage 207, respectively; the second intake passage 232 communicates with the second branch passage 206; the intake assembly 400 includes a first intake pipe 401 and a second intake pipe 402 that are provided corresponding to the first intake passage 231 and the second intake passage 232, respectively.

According to the first type of gas supply structure provided by the embodiment of the disclosure, the gas distribution assembly 200 is set to be a three-ring gas distribution channel structure, so that the first gas inlet channel 231 is communicated with the first gas distribution channel 205 and the third gas distribution channel 207 which are not adjacent to each other. Thus, when the intake flow and/or the conduction state of the first intake pipe 401 corresponding to the first intake channel 231 is adjusted, the first gas distribution channel 205 and the third gas distribution channel 207 can be synchronously adjusted to form two-ring fire with a certain distance and synchronous fire for the burner, and compared with single-ring fire, the heating area can be effectively enlarged, and the uniformity of heating is improved.

Here, the switching device may be a mechanical valve structure provided on the intake pipe 410, or may be an electronic valve structure that can be controlled through an input terminal. The input end can be a key, a panel, a mobile terminal or other intelligent household appliances and the like.

Alternatively, in the first type of air supply structure, the switching device provided on the intake pipe 410 includes a first control valve 404 and a second control valve 405. The first control valve 404 is used for adjusting the conduction state and/or the intake air flow rate of the first intake pipe 401 so as to simultaneously adjust the combustion state of the corresponding independent air paths of the first air distribution channel and the third air distribution channel on the burner; the second control valve 405 is used to control the conduction state and/or the intake air flow rate of the second intake pipe 402 to adjust the combustion state of the corresponding independent air path of the second branch air passage on the burner.

Here, the conduction state and/or the intake air flow rate of the first intake pipe 401 and the second intake pipe 402 are adjusted by two control valves, respectively. For example, when the first control valve 404 is in the first state, the first air inlet pipe 401 is closed, and the first air inlet channel 231 does not have air inlet, so that the first air dividing channel 205 and the third air dividing channel 207 do not supply air to the burner; when the first control valve 404 is in the second state, the first air inlet pipe 401 is communicated, external fuel gas is introduced into the first air inlet channel 231, the first air distribution channel 205 and the third air distribution channel 207 which are communicated with the first air inlet pipe simultaneously supply air to the burner, and air paths corresponding to the first air distribution channel 205 and the third air distribution channel 207 on the burner respectively burn and supply heat. Alternatively, the first control valve 404 may be set in a plurality of stages between the first state and the second state to adjust the intake air flow rate of the first intake pipe 401. Adjustment of the intake air flow rate may also be achieved by providing a gas regulating valve separately on the intake pipe 410.

Similarly, when the second control valve 405 is in the first state, the second air intake pipe 402 is closed, and the second air intake passage 232 does not intake air, so the second air distribution passage 206 does not supply air to the burner; when the second control valve 405 is in the second state, the second air inlet pipe 402 is connected to introduce external fuel gas into the second air inlet channel 232, the second gas distribution channel 206 communicated with the second air inlet pipe supplies air to the burner, and the gas path corresponding to the second gas distribution channel 206 on the burner burns to supply heat. Alternatively, the second control valve 405 may be provided with a plurality of shift stages for adjusting the intake air flow rate of the second intake pipe 402 between the first state and the second state.

In this manner, in the first type of air supply structure, the adjustment of the air supply states of the first branch air passage 205, the second branch air passage 206, and the third branch air passage 207 can be realized by the first control valve 404 and the second control valve 405 to realize the diversified combustion states of the burners. When the first air inlet pipe 401 corresponding to the first control valve 404 and the second air inlet pipe 402 corresponding to the second control valve 405 are all communicated, the first air distribution channel 205, the second air distribution channel 206 and the third air distribution channel 207 all supply air to the burner, and then the three-ring air path corresponding to the air distribution channels arranged from inside to outside along the loop line on the burner supplies heat by burning at the same time, so that a three-ring air supply mode with large firepower is provided for the burner, the heating area is large, and the uniformity is good.

When the first air inlet pipe 401 corresponding to the first control valve 404 is conducted and the second air inlet pipe 402 corresponding to the second control valve 405 is closed, the first air distribution channel 205 and the third air distribution channel 207 communicated with the first air inlet channel 231 simultaneously supply air to the burner, the second air distribution channel 206 communicated with the second air inlet channel 232 does not supply air to the burner, two rings of air passages corresponding to the first air distribution channel 205 and the third air distribution channel 207 on the burner simultaneously burn and supply heat, the air passages corresponding to the second air distribution channel 206 arranged between the two rings of air passages stop burning, and the air supply structure provides a double-ring air supply mode with uniform and synchronous inner ring and outer ring for the burner. Due to the certain distance between the first gas distribution channel 205 and the third gas distribution channel 207, the heating in the double-ring gas supply mode is more uniform.

When the first air inlet pipe 401 corresponding to the first control valve 404 is closed and the second air inlet pipe 402 corresponding to the second control valve 405 is communicated, the second gas distribution channel 206 supplies air to the burner, the middle ring air passage corresponding to the second gas distribution channel 206 on the combustion chamber supplies heat through combustion, and the air supply structure provides a middle ring air supply mode for the burner. Since the second air distribution channel 206 is located between the first air distribution channel 205 and the third air distribution channel 207, the heating area of the middle ring air supply mode is larger and the uniformity is better than that of the single inner ring or single outer ring air supply mode.

In the second type of air supply structure provided by the embodiment of the present disclosure, the air distribution assembly 200 further includes, on the basis of the first type of air supply structure, a fourth air distribution channel 208 disposed on a peripheral loop of the third air distribution channel 207; the second intake passage 232 also communicates with the fourth gas-distribution passage 208.

This second kind of air feed structure, through setting up gas distribution assembly 200 to four ring gas distribution channel structures, realize that first inlet channel 231 and nonadjacent first branch gas passageway 205, third divide gas passageway 207 communicate, second inlet channel 232 and nonadjacent second divide gas passageway 206, fourth divide gas passageway 208 to communicate. As such, in adjusting the intake air flow rate and/or the conduction state of the first intake pipe 401 corresponding to the first intake passage 231, the first branch passage 205 and the third branch passage 207 can be adjusted in synchronization; in adjusting the intake air flow rate and/or the conduction state of the second intake pipe 402 corresponding to the second intake passage 232, the second gas distribution passage 206 and the fourth gas distribution passage 208 may be adjusted in synchronization. So, can compare the monocyclic regulation for the combustor provides three kinds of air feed modes, can effectively enlarge the heating region, promotes the homogeneity of heating.

Alternatively, in the second type of air supply structure, the switching device provided on the intake pipe 410 includes a first control valve 404 and a second control valve 405. The function of the first control valve 404 is the same as that of the first type of gas supply structure, and the combustion state of the corresponding independent gas path on the burner of the first gas distribution channel 205 and the third gas distribution channel 207 can be adjusted at the same time. The second control valve 405 adjusts the conducting state and/or the intake air flow rate of the second intake pipe 402 in the second type of air supply structure to simultaneously adjust the combustion states of the corresponding independent air paths of the second air distribution passage 206 and the fourth air distribution passage 208 on the burner.

Here, when the second control valve 405 is in the first state, the second intake pipe 402 is closed, the second intake passage 232 does not intake air, and the second branch passage 206 and the fourth branch passage 208 do not supply air to the burner; when the second control valve 405 is in the second state, the second air inlet pipe 402 is communicated to introduce external fuel gas into the second air inlet channel 232, and then the second air distribution channel 206 and the fourth air distribution channel 208 which are communicated with the second air inlet pipe simultaneously supply air to the burner, and the burner respectively supplies heat by burning with the air passages corresponding to the second air distribution channel 206 and the fourth air distribution channel 208. Alternatively, the second control valve 405 may be provided with a plurality of shift stages for adjusting the intake air flow rate of the second intake pipe 402 between the first state and the second state. Adjustment of the intake air flow rate may also be achieved by providing a gas regulating valve separately on the intake pipe 410.

In this manner, in the second type of air supply structure, the adjustment of the air supply states of the first branch air passage 205, the second branch air passage 206, the third branch air passage 207, and the fourth branch air passage 208 can be realized by the first control valve 404 and the second control valve 405 to realize the diversified combustion states of the burners. For example, when the first control valve 404 and the second control valve 405 respectively control the conduction of the first air inlet pipe 401 and the second air inlet pipe 402, the four-ring gas distribution channel simultaneously supplies air to the burner, and then the four-ring gas channels corresponding to the gas distribution channels arranged from inside to outside along the loop line on the burner simultaneously burn and supply heat, so as to provide a four-ring gas supply mode with large firepower for the burner, and the burner has a large heating area and good uniformity.

When the first control valve 404 or the second control valve 405 independently controls the corresponding air inlet pipe 410 to be conducted and the other air inlet pipe 410 is closed, the spaced double-ring air distribution channel supplies air to the burner at the same time, and the two ring air passages corresponding to the air distribution channel on the burner supply heat through combustion at the same time. The gas supply structure provides two uniform and synchronous double-ring gas supply modes for the burner. Due to the distance between the first gas distribution channel 205 and the third gas distribution channel 207, or between the second gas distribution channel 206 and the fourth gas distribution channel 208, the heating in the double-ring gas supply mode is more uniform. Because the heating area of the second gas distribution channel 206 corresponding to the gas path on the burner is larger than that of the first gas distribution channel 205, and the heating area of the fourth gas distribution channel 208 corresponding to the gas path on the burner is larger than that of the third gas distribution channel, the heating effect when the second control valve 405 controls the second gas inlet pipe 402 to be independently conducted is better than that when the first control valve 404 controls the first gas inlet pipe 401 to be independently conducted, and the provided heat is more.

In the third type of air supply structure provided by the embodiment of the present disclosure, the air distribution assembly 200 is based on the second type of air supply structure, and the air distribution assembly 200 further includes a central air inlet channel 233 and a central air distribution channel 209 disposed on an inner loop of the first air distribution channel 205; the intake assembly 400 also includes a center intake pipe 403 corresponding to the center intake passage 233.

This third kind of air feed structure divides gas passageway 209 through increasing the center, will divide gas subassembly 200 to set up to five rings and divide gas passageway structure, realizes that central inlet channel 233 and center divide the intercommunication of gas passageway 209, and first inlet channel 231 divides gas passageway 205, the third branch gas passageway 207 intercommunication with nonadjacent first, and second inlet channel 232 divides gas passageway 206, the fourth branch gas passageway 208 intercommunication with nonadjacent second, provides five rings air feed modes for the combustor. So, enlarged the branch gas area of air feed, enlarged the reposition of redundant personnel area of gas on the combustor, through the multi-ring air feed mode, increased the variety of the mode of putting out a fire, increased heating area's flexibility, can satisfy multiple culinary art demand.

Optionally, as shown in fig. 17, on the basis of the second air supply structure, in a third air supply structure, the switching device further includes a central control valve 406 for controlling the conducting state and/or the intake air flow rate of the central air inlet pipe 403 to adjust the combustion state of the corresponding independent air path of the central air distribution channel 209 on the burner.

Here, when the central control valve 406 is in the first state, the central intake pipe 403 is closed, the central intake passage 233 is not intake, and the central gas-distributing passage 209 does not supply gas to the burner; when the central control valve 406 is in the second state, the central air inlet pipe 403 is conducted, external fuel gas is introduced into the central air inlet channel 233, the central air distribution channel 209 communicated with the central air inlet pipe supplies air to the burner, and the air is combusted and supplies heat in an air path corresponding to the central air distribution channel 209 of the burner. Alternatively, the center control valve 406 may be set in a plurality of stages between the first state and the second state to adjust the intake air flow rate of the center intake pipe 403. Adjustment of the intake air flow rate may also be achieved by providing a gas regulating valve separately on the intake pipe 410.

In this manner, the central control valve 406, the first control valve 404, and the second control valve 405 are used to control the conduction states and/or the intake air flow rates of the central intake pipe 403, the first intake pipe 401, and the second intake pipe 402, respectively, to adjust the conduction states of the gas distribution passages corresponding to the intake pipes 410.

Alternatively, as shown in fig. 18, in addition to the second type air supply structure described above, in a third type air supply structure, the second control valve 405 of the switching device is also used to adjust the conduction state and/or the intake air flow rate of the center intake pipe 403 in addition to adjusting the conduction state and/or the intake air flow rate of the second intake pipe 402. On the basis of realizing the simultaneous adjustment of the second gas distribution channel 206 and the fourth gas distribution channel 208, the second control valve 405 can also adjust the combustion state of the corresponding independent gas circuit of the central gas distribution channel 209 on the combustor.

Here, the second control valve 405, when used to adjust the conduction state and/or intake air flow rate of the central intake pipe 403 and the second intake pipe 402, at least includes the combustion state of the corresponding independent air path on the burner:

when the second control valve 405 is in the first state, the center intake pipe 403 is open and the second intake pipe 402 is closed. The central air inlet pipe 403 introduces external fuel gas into the central air inlet channel 233, the central air distribution channel 209 communicated with the central air inlet channel supplies air to the burner, and a corresponding independent air path on the burner burns; the second intake passage 232 is free of intake air and the second and fourth

gas distribution passages

206, 208 communicating therewith do not supply air to the burner. In this state, in combination with the state of the first control valve 404, the gas supply structure can realize a central loop gas supply mode (the first control valve 404 is in the first state, the first branch gas channel 205 and the third branch gas channel 207 do not supply gas to the burner) only for the burner, or a small three-loop gas supply mode (the first control valve 404 is in the second state, the first branch gas channel 205 and the third branch gas channel 207 supply gas to the burner at the same time).

When the second control valve 405 is in the second state, the central air inlet pipe 403 and the second air inlet pipe 402 are both communicated, and external fuel gas is introduced into the central air inlet passage 233, the second gas distribution passage 206 and the fourth gas distribution passage 208; at this time, the central gas distribution passage 209, the second gas distribution passage 206 and the fourth gas distribution passage 208 are simultaneously combusted in the respective independent gas paths of the combustor. In this state, in combination with the state of the first control valve 404, the gas supply structure can realize a large three-ring gas supply mode (the first control valve 404 is in the first state, and the first gas distribution channel 205 and the third gas distribution channel 207 do not supply gas to the burner) or a five-ring gas supply mode (the first control valve 404 is in the second state, and the first gas distribution channel 205 and the third gas distribution channel 207 simultaneously supply gas to the burner). The big three-ring air supply mode under this state for little three-ring air supply mode, because the combustion area of the gas circuit of opening on the combustor is bigger, heating area is wider, has better heating effect.

When the second control valve 405 is in the third state, the central intake pipe 403 is closed, and the central intake passage 233 corresponding thereto does not supply air; the second intake pipe 402 is communicated, and the second branch passage 206 and the fourth branch passage 208 communicated therewith simultaneously supply air to the burners. At this time, the central gas distribution channel 209 stops burning on the corresponding independent gas path on the burner, and the second gas distribution channel 206 and the fourth gas distribution channel 208 burn on the corresponding independent gas path on the burner at the same time. In this state, in combination with the state of the first control valve 404, the gas supply structure can realize a big double-ring gas supply mode (the first control valve 404 is in the first state, and the first gas distribution channel 205 and the third gas distribution channel 207 do not supply gas to the burner) or a four-ring gas supply mode (the first control valve 404 is in the second state, and the first gas distribution channel 205 and the third gas distribution channel 207 simultaneously supply gas to the burner).

When the second control valve 405 is in the closed state, the center intake pipe 403 and the second intake pipe 402 are closed at the same time, and the corresponding center intake passage 233 and the second intake passage 232 do not supply air to the burner. At this point, the burner assumes a small double loop supply mode when the first control valve 404 is in the second state. In the small three-ring air supply mode in this state, a stable and uniform heating effect with small fire can be achieved as compared with the large three-ring air supply mode.

So, through auto-change over device, can adjust the air feed state of air feed structure to the combustor to the realization is to the combustion state that corresponds the gas circuit on the combustor, through the change that admits air of air feed route, realizes multiple air feed mode, makes the combustor have multiple form of putting out a fire, can adapt to different culinary art demands.

In the embodiment of the present disclosure, according to the structure of the gas distribution plate, the burner includes the aforementioned first type gas distribution plate, second type gas distribution plate, or third type gas distribution plate, and accordingly, the first type burner, the second type burner, or the third type burner is obtained.

In the embodiment of the present disclosure, depending on the gas supply structure for the burner, the burner includes the aforementioned first type gas supply structure, second type gas supply structure, or third type gas supply structure, and accordingly, a plurality of kinds of burners having different gas supply structures are obtained.

The combustor of the embodiment of the disclosure can provide flexible and changeable heating area, and the heating area is large, and is suitable for various cooking requirements.

The embodiment of the disclosure provides a gas stove, which comprises the combustor.

In some embodiments, the gas burner comprises one or more of the aforementioned burners. When the gas range comprises a plurality of burners as described above, the burners used may be different.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A burner, comprising:

the fire cover assembly comprises a first annular sub fire cover and a second annular sub fire cover, and the second annular sub fire cover is sleeved on the periphery of the first annular sub fire cover;

the gas distribution assembly is matched with the first annular sub-fire cover to define a first annular combustion chamber and a second annular combustion chamber which are mutually independent, and is matched with the second annular sub-fire cover to define a third annular combustion chamber and a fourth annular combustion chamber which are mutually independent;

wherein the first annular combustion chamber and the third annular combustion chamber are communicated with each other, and the second annular combustion chamber and the fourth annular combustion chamber are communicated with each other.

2. The burner of claim 1, wherein the gas distribution assembly comprises:

an intake portion including a first intake passage and a second intake passage;

the air outlet end of the first air inlet channel is communicated with the first annular combustion cavity and the third annular combustion cavity;

and the air outlet end of the second air inlet channel is communicated with the second annular combustion cavity and the fourth annular combustion cavity.

3. The burner of claim 2, wherein the gas distribution assembly further comprises:

the gas distribution part is arranged above the gas inlet part and comprises a first gas distribution channel corresponding to the first annular combustion cavity, a second gas distribution channel corresponding to the second annular combustion cavity, a third gas distribution channel corresponding to the third annular combustion cavity and a fourth gas distribution channel corresponding to the fourth annular combustion cavity;

the first air inlet channel is communicated with the first air distribution channel and the third air distribution channel; the second air inlet channel is communicated with the second air distribution channel and the fourth air distribution channel.

4. The burner of claim 3,

a first partition wall is arranged in the first annular sub fire cover to divide the first annular sub fire cover into a first annular combustion chamber and a second annular combustion chamber which are independent along a circular line; and/or the presence of a gas in the gas,

and a second partition wall is arranged in the second annular sub fire cover and divides the second annular sub fire cover into a third annular combustion chamber and a fourth annular combustion chamber which are independent along a circular line.

5. The burner of claim 3,

the top of the gas distribution part is provided with a first convex rib formed along a loop line, the top of the first convex rib abuts against the inner side of the top wall of the first annular sub-fire cover, and the first convex rib is matched with the first annular sub-fire cover to define a first annular combustion chamber and a second annular combustion chamber which are independent; and/or the presence of a gas in the gas,

the top of the gas distribution part is provided with a second convex rib formed along a loop line, the top of the second convex rib abuts against the inner side of the top wall of the second annular sub-fire cover and is matched with the second annular sub-fire cover to define a third annular combustion cavity and a fourth annular combustion cavity which are independent;

the second convex rib is arranged on the periphery of the first convex rib.

6. The burner of claim 3,

a first partition wall is arranged inside the first annular sub-fire cover, a first convex rib formed along a circular line is arranged at the top of the gas distribution part, the first partition wall is abutted against the first convex rib, and a first annular combustion chamber and a second annular combustion chamber which are independent are defined in a matched manner;

a second partition wall is arranged in the second annular sub fire cover, a second convex rib formed along a loop line is arranged at the top of the gas distribution part, and the second convex rib is arranged on the periphery of the first convex rib; the second partition wall is abutted against the second convex rib and matched with the second convex rib to define a third annular combustion chamber and a fourth annular combustion chamber which are independent.

7. The burner of any of claims 1 to 6, wherein the ratio of the area of the first annular combustion chamber to the area of the third annular combustion chamber is from 1:2 to 1: 3.

8. A burner according to any one of claims 1 to 6, wherein the ratio of the area of the second annular combustion chamber to the area of the fourth annular combustion chamber is from 1:3 to 1: 5.

9. The burner of claim 1,

the fire cover assembly also comprises a central fire cover which is arranged inside the first annular sub fire cover and is concentric with the first annular sub fire cover and the second annular sub fire cover;

the gas distribution assembly is also matched with the central fire cover to limit a central combustion cavity.

10. A gas burner comprising a burner as claimed in any one of claims 1 to 9.