Burner and cooker

Abstract

Provided are a burner and a cooker. The burner includes a base, a gas distribution plate arranged at the base, and an outer ring fire cover arranged at the gas distribution plate. An outer ring gas mixing cavity is defined by the outer ring fire cover and the gas distribution plate. An outer ring fire hole in communication with the outer ring gas mixing cavity being formed on a circumferential side surface of the outer ring fire cover. A flow guide space is formed at a junction between the circumferential side surface of the outer ring fire cover and a top surface of the outer ring fire cover. The flow guide space is configured to guide secondary air above the outer ring fire cover to the circumferential side surface of the outer ring fire cover. The above burner is conducive to reducing smoke generated during combustion of the burner and enhancing an energy efficiency of the burner.

Description

FIELD

[0001] The present application relates to the field of cooker technologies, and more particularly, to a burner and a cooker.BACKGROUND

[0002] In the related art, the burner includes an outer ring fire cover having outer ring fire holes. Due to a high density of the outer ring fire holes, a supplement of secondary air to the outer ring fire holes is not smooth, which is likely to lead to a high smoke concentration and a low energy efficiency during combustion of the burner.SUMMARY

[0003] Embodiments of the present application provide a burner and a cooker to solve the above technical problems.

[0004] In a first aspect of the present application, a burner according to an embodiment of the present application includes: a base; a gas distribution plate arranged at the base; and an outer ring fire cover arranged at the gas distribution plate. An outer ring gas mixing cavity is defined by the outer ring fire cover and the gas distribution plate. An outer ring fire hole in communication with the outer ring gas mixing cavity being formed on a circumferential side surface of the outer ring fire cover. Flow guide spaces are formed at a junction between the circumferential side surface of the outer ring fire cover and a top surface of the outer ring fire cover. The flow guide space is configured to guide secondary air above the outer ring fire cover to the circumferential side surface of the outer ring fire cover.

[0005] With the above burner, the flow guide space is formed at the junction between the circumferential side surface of the outer ring fire cover and the top surface of the outer ring fire cover. The flow guide space can be configured to guide the secondary air above the outer ring fire cover to the circumferential side surface of the outer ring fire cover. Therefore, the secondary air can be supplemented to the outer ring fire hole, which is conducive to reducing smoke generated during combustion of the burner and enhancing an energy efficiency of the burner.

[0006] In some embodiments, the gas distribution plate includes an intermediate portion and an outer ring portion connected to the intermediate portion, the outer ring portion being arranged around the intermediate portion, and the intermediate portion having an inner ring gas mixing cavity and an inner ring fire hole in communication with the inner ring gas mixing cavity. The outer ring fire cover is arranged at the outer ring portion, the outer ring gas mixing cavity being defined by the outer ring fire cover and the outer ring portion.

[0007] In some embodiments, the gas distribution plate includes an outer ring portion, the outer ring fire cover being arranged at the outer ring portion, the outer ring gas mixing cavity being defined by the outer ring fire cover and the outer ring portion, the outer ring fire cover having a plurality of middle ring fire holes arranged at intervals in a circumferential direction of the burner, the plurality of middle ring fire holes being in communication with the outer ring gas mixing cavity, a plurality of flame stabilization grooves in communication with the outer ring gas mixing cavity being formed on a surface of the outer ring portion facing towards a central axis of the burner, the plurality of flame stabilization grooves being arranged at intervals in the circumferential direction of the burner, and the plurality of flame stabilization grooves being arranged in a one-to-one correspondence with the plurality of middle ring fire holes in a direction parallel to the central axis of the burner. The circumferential side surface of the outer ring fire cover faces away from the central axis of the burner.

[0008] In some embodiments, the base has a bottom gas mixing cavity. The gas distribution plate is arranged at the base. A surface of the base facing towards the gas distribution plate is provided with a plurality of ribs arranged at intervals in a circumferential direction of the burner. An air channel is formed between two adjacent ribs of the plurality of ribs and has primary air channels and secondary air channels that are alternately arranged in the circumferential direction of the burner. The primary air channels are in communication with the bottom gas mixing cavity. The gas distribution plate has a plurality of through holes. The plurality of through holes are in communication with the secondary air channels, respectively. The burner further includes a central fire cover arranged at the gas distribution plate. A central gas mixing cavity is defined by the central fire cover and the gas distribution plate. The central fire cover has inner ring fire holes in communication with the central gas mixing cavity. The inner ring fire holes are in communication with the secondary air channel through the plurality of through holes, respectively. The circumferential side surface of the outer ring fire cover faces away from the central fire cover.

[0009] In some embodiments, the flow guide space is a groove formed at the junction between the circumferential side surface of the outer ring fire cover and the top surface of the outer ring fire cover.

[0010] In some embodiments, the groove has a width that gradually increases in a direction away from a bottom of the groove.

[0011] In some embodiments, the groove is obliquely connected, obliquely relative to a horizontal plane, to the circumferential side surface of the outer ring fire cover and the top surface of the outer ring fire cover.

[0012] In some embodiments, the groove includes first grooves and second grooves, the first grooves being divided to a first groove group in a circumferential direction of the burner, one second recess of the second groove being arranged between two adjacent first groove groups of first groove groups, and each of the second grooves having a greater width than each of the first grooves.

[0013] In some embodiments, in an axial direction of the burner, a part of the circumferential side surface of the outer ring fire cover corresponding to the second groove is a second region.

[0014] In some embodiments, the remaining part of the circumferential side surface of the outer ring fire cover is a first region, the second region having a smaller fire hole density than the first region.

[0015] In some embodiments, a plurality of outer ring fire holes are arranged into a first fire hole row in a circumferential direction of the burner, and a plurality of outer ring fire holes are arranged into a second fire hole row in the circumferential direction of the burner.

[0016] In some embodiments, the first fire hole row and the second fire hole row are spaced apart from each other in an axial direction of the burner. The plurality of outer ring fire holes of the first fire hole row are offset from the plurality of outer ring fire holes of the second fire hole row in the axial direction of the burner.

[0017] In some embodiments, the first fire hole row is closer to a top of the outer ring fire cover than the second fire hole row, the plurality of outer ring fire holes of the first fire hole row being located between two adjacent flow guide spaces in the circumferential direction of the burner, and each of the plurality of outer ring fire holes of the second fire hole row corresponding to the flow guide space in the axial direction of the burner.

[0018] In some embodiments, the burner further includes: a flame stabilization groove in a ring shape, the flame stabilization groove being located at a side of the outer ring fire hole away from the outer ring fire cover, and the flame stabilization groove being in communication with the outer ring gas mixing cavity.

[0019] A cooker according to an embodiment of the present application includes the burner according to any of the above embodiments.

[0020] With the above cooker, the flow guide space is formed at the junction between the circumferential side surface of the outer ring fire cover and the top surface of the outer ring fire cover. The flow guide space can be configured to guide the secondary air above the outer ring fire cover to the circumferential side surface of the outer ring fire cover. Therefore, the secondary air can be supplemented to the outer ring fire hole, which is conducive to reducing smoke generated during combustion of the burner and enhancing an energy efficiency of the burner.

[0021] In a second aspect of the present application, a burner according to an embodiment of the present application includes: a base; a gas distribution plate arranged at the base and including an intermediate portion and an outer ring portion connected to the intermediate portion, the outer ring portion being arranged around the intermediate portion, and the intermediate portion having an inner ring gas mixing cavity and an inner ring fire hole in communication with the inner ring gas mixing cavity; and an outer ring fire cover arranged at the outer ring portion, an outer ring gas mixing cavity being defined by the outer ring fire cover and the outer ring portion, and the outer ring fire cover having an outer ring fire hole in communication with the outer ring gas mixing cavity.

[0022] With the above burner, the intermediate portion of the gas distribution plate has the inner ring gas mixing cavity and the inner ring fire hole, which can eliminate a need for the inner ring fire cover to reduce material usage of the burner, achieving a purpose of cost reduction and efficiency improvement.

[0023] In some embodiments, the gas distribution plate includes an ejection tube connected at a side of the intermediate portion facing the base. The ejection tube has an ejection channel in communication with the inner ring gas mixing cavity. The intermediate portion includes a top plate facing the ejection channel. The inner ring fire hole penetrates the top plate.

[0024] In some embodiments, an outer surface of the top plate of the intermediate portion includes a central region and a peripheral region. The peripheral region is configured to connect the central region and a circumferential side surface of the intermediate portion in a circumferential direction of the burner. The inner ring fire hole penetrates the peripheral region. The central region is arranged in a horizontal direction. The peripheral region is inclined, with respect to the central region, towards the base by an angle ranging from 10° to 30°.

[0025] In some embodiments, the gas distribution plate includes a plurality of connection portions arranged at intervals in the circumferential direction of the burner. The plurality of connection portions are configured to connect the intermediate portion and the outer ring portion. In an axial direction of the burner, the inner ring fire hole is corresponding to a gap between two adjacent connection portions of the plurality of connection portions.

[0026] In some embodiments, the gas distribution plate is provided with a plurality of ribs at a side of the gas distribution plate away from the outer ring fire cover. The plurality of ribs are arranged at intervals in the circumferential direction of the burner. An air channel is formed between two adjacent ribs of the plurality of ribs.

[0027] In some embodiments, the air channel includes primary air channels and secondary air channels that are alternately arranged in the circumferential direction of the burner. The base has a bottom gas mixing cavity. The primary air channels are in communication with the bottom gas mixing cavity. The secondary air channels are in communication with the gap between the two adjacent connection portions of the plurality of connection portions.

[0028] In some embodiments, for the two adjacent ribs that form a respective air channel, a surface of each of the two adjacent ribs towards the respective air channel is provided with one arc-shaped protrusion in a region close to an air channel air inlet.

[0029] In some embodiments, the gas distribution plate is provided with a guide mounting structure at a surface of the gas distribution plate facing the base, the base having the bottom gas mixing cavity.

[0030] In some embodiments, the guide mounting structure includes a plurality of guide blocks arranged at intervals in the circumferential direction of the burner and in contact or clearance fit with a surface of the base facing towards the bottom gas mixing cavity.

[0031] In some embodiments, each of the plurality of guide blocks has a bottom surface, a side surface, and an inclined surface. The inclined surface is obliquely connected to the bottom surface from the side surface towards a central axis of the burner.

[0032] A cooker according to an embodiment of the present application includes the burner according to any of the above embodiments.

[0033] In addition, with the above burner, the intermediate portion of the gas distribution plate has the inner ring gas mixing cavity and the inner ring fire hole, which can eliminate a need for the inner ring fire cover to reduce material usage of the burner, achieving a purpose of cost reduction and efficiency improvement.

[0034] In a third aspect of the present application, a burner according to an embodiment of the present application includes: a base; a gas distribution plate arranged at the base and including an outer ring portion; and an outer ring fire cover arranged at the outer ring portion. An outer ring gas mixing cavity is defined by the outer ring fire cover and the outer ring portion. The outer ring fire cover has a plurality of middle ring fire holes arranged at intervals in a circumferential direction of the burner. The plurality of middle ring fire holes are in communication with the outer ring gas mixing cavity. A plurality of flame stabilization grooves are formed on a surface of the outer ring portion towards a central axis of the burner. The plurality of flame stabilization grooves are in communication with the outer ring gas mixing cavity. The plurality of flame stabilization grooves are arranged at intervals in the circumferential direction of the burner. The plurality of flame stabilization grooves are arranged in a one-to-one correspondence with the plurality of middle ring fire holes in a direction parallel to the central axis of the burner.

[0035] With the above burner, the surface of the outer ring portion towards the central axis of the burner has the plurality of flame stabilization grooves. The plurality of flame stabilization grooves are arranged in a one-to-one correspondence with the plurality of middle ring fire holes in the direction parallel to the central axis of the burner. In this way, flames in the flame stabilization grooves can stabilize flames in the middle ring fire holes during an operation of the burner, which can therefore enhance a flame stabilization effect and improve combustion performance, reducing a concentration of smoke during combustion of the burner.

[0036] In some embodiments, the outer ring fire cover includes a top surface and an inclined surface. The inclined surface is connected to an edge of the top surface close to a central axis of the burner and inclined from the top surface towards the base. The middle ring fire holes penetrate the inclined surface.

[0037] In some embodiments, the inclined surface is inclined by an angle ranging from 10° to 30°.

[0038] In some embodiments, the middle ring fire hole is inclined from the outer ring portion towards the central axis of the burner. An angle between an axis of the middle ring fire hole and the central axis of the burner ranges from 40° to 60°.

[0039] In some embodiments, in the direction parallel to the central axis of the burner, a plurality of middle ring fire holes are corresponding to the plurality of flame stabilization grooves, respectively, and the plurality of middle ring fire holes are arranged at intervals in a direction away from the central axis of the burner.

[0040] In some embodiments, the gas distribution plate includes an intermediate portion and a plurality of connection portions. The plurality of connection portions are arranged at intervals in a circumferential direction of the burner and configured to connect the outer ring portion and the intermediate portion.

[0041] In some embodiments, a secondary air channel is defined by two adjacent connection portions of the plurality of connection portions, the outer ring portion, and the intermediate portion. The plurality of flame stabilization grooves are arranged at a surface of the outer ring portion towards the secondary air channel.

[0042] In some embodiments, the outer ring portion includes a first side plate, a bottom plate, and a second side plate. The bottom plate is configured to connect the first side plate and the second side plate. A first cavity is defined by the first side plate, the second side plate, and the bottom plate. The outer ring fire cover has a second cavity. The outer ring gas mixing cavity is defined by the first cavity and the second cavity.

[0043] In some embodiments, the first side plate is closer to the intermediate portion than the second side plate. The first side plate is provided with a first step portion at a surface of the first side plate towards the first cavity. The outer ring fire cover is provided with a second step portion at a surface of the outer ring fire cover faces away from the second cavity. The first step portion is engaged with and connected to the second step portion.

[0044] In some embodiments, the intermediate portion has an inner ring gas mixing cavity and an inner ring fire hole, the inner ring fire hole being in communication with the inner ring gas mixing cavity.

[0045] In some embodiments, the outer ring fire cover has an outer ring fire hole at a circumferential side surface of the outer ring fire cover faces away from the central axis of the burner. The outer ring fire hole is in communication with the outer ring gas mixing cavity.

[0046] In some embodiments, flow guide spaces are formed at a junction between the circumferential side surface of the outer ring fire cover faces away from the central axis of the burner and a top surface of the outer ring fire cover. The flow guide space is configured to guide secondary air above the outer ring fire cover to the circumferential side surface of the outer ring fire cover faces away from the central axis of the burner.

[0047] A cooker according to an embodiment of the present application includes the burner according to any of the above embodiments.

[0048] In addition, with the above cooker, the surface of the outer ring portion towards the central axis of the burner has the plurality of flame stabilization grooves. The plurality of flame stabilization grooves are arranged in a one-to-one correspondence with the plurality of middle ring fire holes in the direction parallel to the central axis of the burner. In this way, flames in the flame stabilization grooves can stabilize flames in the middle ring fire holes during an operation of the burner, which can therefore enhance a flame stabilization effect and improve combustion performance, reducing a concentration of smoke during combustion of the burner.

[0049] In a fourth aspect of the present application, a burner according to an embodiment of the present application includes: a base having a bottom gas mixing cavity; a gas distribution plate arranged at the base, a surface of the base facing towards the gas distribution plate is provided with a plurality of ribs arranged at intervals in a circumferential direction of the burner, an air channel being formed between two adjacent ribs of the plurality of ribs and having primary air channels and secondary air channels that are alternately arranged in the circumferential direction of the burner, the primary air channels being in communication with the bottom gas mixing cavity, the gas distribution plate having a plurality of through holes, and the plurality of through holes being in communication with the secondary air channels, respectively; a central fire cover arranged at the gas distribution plate, a central gas mixing cavity being defined by the central fire cover and the gas distribution plate, the central fire cover having an inner ring fire hole in communication with the central gas mixing cavity, and the inner ring fire hole being in communication with the secondary air channels through the plurality of through holes, respectively; and an outer ring fire cover arranged at the gas distribution plate, an outer ring gas mixing cavity being defined by the outer ring fire cover and the gas distribution plate, and the outer ring fire cover having an outer ring fire hole in communication with the outer ring gas mixing cavity.

[0050] With the above burner, a plurality of secondary air channels are arranged at the base. The secondary air channel is in communication with the inner ring fire hole, which can allow the secondary air to be continuously supplemented to improve performance of the burner. The plurality of primary air channels and the plurality of secondary air channels are arranged at intervals in the circumferential direction of the burner, which can reduce resistance in a hot state to increase a supplemental flow rate of air, supplying sufficient first air and secondary air to the burner.

[0051] In some embodiments, each of the primary air channels has a bottom surface that is inclined from a top of the bottom gas mixing cavity to a bottom of the bottom gas mixing cavity.

[0052] In some embodiments, the bottom surface of each of the plurality of primary air channels is provided with a baffle bar.

[0053] In some embodiments, two of the plurality of ribs that form a same primary air channel are parallel to each other.

[0054] In some embodiments, the gas distribution plate is provided with a mounting portion at a surface of the gas distribution plate facing the base. The burner includes a connection rib configured to connect two ends of the two of the plurality of ribs that form the one secondary air channel, the two ends of the two of the plurality of ribs that form the one secondary air channel being close to an axis of the burner.

[0055] In some embodiments, the connection rib is provided with a guide portion at a surface of the connection rib towards the bottom gas mixing cavity, the mounting portion being located at the bottom gas mixing cavity and supported by the guide portion.

[0056] In some embodiments, the gas distribution plate includes a central portion, a plurality of connection portions, and an outer ring portion. The central fire cover is arranged at the central portion. The outer ring fire cover is arranged at the outer ring portion. The plurality of connection portions are configured to connect the central portion to the outer ring portion in the circumferential direction of the burner.

[0057] In some embodiments, a secondary air cavity is defined by two adjacent connection portions of the plurality of adjacent connection portions, the central portion, and the outer ring portion. The inner ring fire hole is in communication with two adjacent through holes of the plurality of through holes by the secondary air cavity.

[0058] In some embodiments, the inner ring fire hole is corresponding to the secondary air cavity in a direction parallel to the axis of the burner.

[0059] In some embodiments, the outer ring fire cover includes an inclined surface towards the axis of the burner. The inclined surface has a middle ring fire hole in communication with the outer ring gas mixing cavity. The middle ring fire hole is corresponding to the secondary air cavity in the direction parallel to the axis of the burner.

[0060] In some embodiments, the inclined surface is provided with a plurality of protrusions arranged at intervals in the circumferential direction of the burner. A first groove is formed between two adjacent protrusions of the plurality of protrusions. The first groove has the middle ring fire hole at a bottom surface of the first groove. Each of the plurality of protrusions has the middle ring fire hole.

[0061] In some embodiments, the outer ring fire hole is arranged at a circumferential side surface of the outer ring fire cover faces away from the central fire cover. Flow guide spaces are formed at a junction between the circumferential side surface of the outer ring fire cover faces away from the central fire cover and a top surface of the outer ring fire cover.

[0062] In some embodiments, the flow guide space is configured to guide secondary air above the outer ring fire cover to the circumferential side surface of the outer ring fire cover faces away from the central fire cover.

[0063] In some embodiments, the flow guide space has first flow guide spaces and second flow guide spaces, the first flow guide spaces being divided into a first flow guide group in the circumferential direction of the burner, one second guide space of the second flow guide spaces being arranged between two adjacent first flow guide groups of first flow guide groups, and each of the second flow guide spaces having a greater width than each of the first flow guide spaces.

[0064] A cooker according to an embodiment of the present application includes the burner according to any of the above embodiments.

[0065] In addition, with the above cooker, a plurality of secondary air channels are arranged at the base. The secondary air channel is in communication with the inner ring fire hole, which can allow the secondary air to be continuously supplemented to improve performance of the burner. The plurality of primary air channels and the plurality of secondary air channels are arranged at intervals in the circumferential direction of the burner, which can reduce resistance in a hot state to increase a supplemental flow rate of air, supplying sufficient first air and secondary air to the burner

[0066] Additional aspects and advantages of the present application will be provided at least in part in the following description, or will become apparent at least in part from the following description, or can be learned from practicing of the present application.BRIEF DESCRIPTION OF THE DRAWINGS

[0067] In order to clearly explain technical solutions according to embodiments of the present application or in the related art, drawings used in the description of the embodiments or the related art are briefly described below. Obviously, the drawings as described below are merely some embodiments of the present application. Based on these drawings, other drawings can be obtained by those skilled in the art without creative effort. FIG. 1 is a first schematic perspective view of a burner according to an embodiment of the present application. FIG. 2 is a first schematic exploded view of a burner according to an embodiment of the present application. FIG. 3 is a second schematic perspective view of a burner according to an embodiment of the present application. FIG. 4 is a second schematic exploded view of a burner according to an embodiment of the present application. FIG. 5 is a schematic side view of a burner according to an embodiment of the present application. FIG. 6 is a schematic cross-sectional view of a burner according to an embodiment of the present application. FIG. 7 is a first schematic perspective view of a burner according to another embodiment of the present application. FIG. 8 is a first schematic exploded view of a burner according to another embodiment of the present application. FIG. 9 is a second schematic perspective view of a burner according to another embodiment of the present application. FIG. 10 is a second schematic exploded view of a burner according to another embodiment of the present application. FIG. 11 is a third schematic exploded view of a burner according to another embodiment of the present application. FIG. 12 is a first schematic cross-sectional view of a burner according to another embodiment of the present application. FIG. 13 is a second schematic cross-sectional view of a burner according to another embodiment of the present application. FIG. 14 is a third schematic cross-sectional view of a burner according to another embodiment of the present application. FIG. 15 is a schematic perspective view of a gas distribution plate according to another embodiment of the present application. FIG. 16 is a schematic exploded view of a gas distribution plate according to another embodiment of the present application. FIG. 17 is a first schematic perspective view of a burner according to yet another embodiment of the present application. FIG. 18 is a first schematic exploded view of a burner according to yet another embodiment of the present application. FIG. 19 is a second schematic perspective view of a burner according to yet another embodiment of the present application. FIG. 20 is a schematic cross-sectional view of a burner according to yet another embodiment of the present application. FIG. 21 is a second schematic exploded view of a burner according to yet another embodiment of the present application. FIG. 22 is a top view of a burner according to yet another embodiment of the present application. FIG. 23 is a cross-sectional view of the burner of FIG. 22 taken along line A-A. FIG. 24 is a schematic perspective view of a burner according to still yet another embodiment of the present application. FIG. 25 is a top view of a burner according to still yet another embodiment of the present application. FIG. 26 is a side view of a burner according to still yet another embodiment of the present application. FIG. 27 is a top view of a burner according to still yet another embodiment of the present application. FIG. 28 and FIG. 29 each are a schematic exploded view of a burner according to an embodiment of the present application. FIG. 30 and FIG. 31 each are a schematic cross-sectional view of a burner according to an embodiment of the present application.

[0068] Description of reference numerals of main components in the accompanying drawings: burner 100, 200, 300, base 12, 13, 102, 202, gas distribution plate 14, 15, 104, 204, outer ring fire cover 16, 19, 106, 206, central fire cover 17, inner ring gas mixing cavity 112, 228, outer ring gas mixing cavity 18, 35, 116, 210, outer ring fire hole 20, 37, 118, 234, bottom gas mixing cavity 21, 24, 120, 218, flow guide space 22, 178, 258, rib 23, 152, nozzle mounting base 26, 39, 124, 220, first chamber 126, 242, second chamber 128, 244, port 28, 41, 222, through hole 29, outer ring portion 30, 49 110, central gas mixing cavity 31, intermediate portion 32, 42, 108, 224, connection portion 34, 47, 226, first outer ring cavity 36, intermediate cavity 38, ejection channel 40, inner ring fire hole 33, 42, 114, 230, ejection tube 43, 136, ejection channel 138, 232, second outer ring cavity 44, central portion 45, ignition needle 46, 76, 132, 260, thermocouple 48, 78, 130, 262, accommodation groove 50, first cavity 51, first groove 52, connection chamber 53, 148, second groove 54, second cavity 55, first groove group 56, third cavity 57, second region 58, fourth cavity 59, first region 60, fixation portion 61, first fire hole row 62, baffle bar 63, second fire hole row 64, mounting portion 65, flame stabilization groove 66, 214, connection rib 67, guide portion 68, secondary air cavity 69, inclined portion 70, 248, middle ring fire hole 72, 212, protrusion 73, first recess 74, first flow guide space 80, second flow guide space 82, first flow guide group 84, second recess 86, primary air channel 87, 134, 216, secondary air channel 88, 154, 250, connection pipe 122, top plate 140, central region 142, peripheral region 144, connection portion 146, gap 150, arc-shaped protrusion 156, first portion 158, second portion 160, fastener 162, first mounting hole 164, second mounting hole 166, guide mounting structure 168, guide block 170, bottom surface 172, side surface 174, inclined surface 176, first side plate 236, bottom plate 238, second side plate 240, top surface 246, first step portion 252, second step portion 254, third step portion 256.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0069] Embodiments of the present application will be described in detail below with reference to examples thereof as illustrated in the accompanying drawings, throughout which same or similar elements, or elements having same or similar functions, are denoted by same or similar reference numerals. The embodiments described below with reference to the drawings are illustrative only, and are intended to explain, rather than limit, the present application.

[0070] In the description of the present application, it should be understood that the orientation or the position indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "over", "below", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "anti-clockwise" should be construed to refer to the orientation or the position as shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the pointed device or element must have a specific orientation, or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features associated with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "plurality" means at least two, unless otherwise specifically defined.

[0071] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, terms such as "install", "connect", "connect to", and the like should be understood in a broad sense. For example, it may be a fixed connection or a detachable connection or connection as one piece; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate; internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to specific circumstances.

[0072] In the present application, unless expressly stipulated and defined otherwise, the first feature "on" or "under" the second feature may mean that the first feature is in direct contact with the second feature, or the first and second features are in indirect contact through another feature between them. Moreover, the first feature "above" the second feature means that the first feature is directly above or obliquely above the second feature, or simply means that the level of the first feature is higher than that of the second feature. The first feature "below" the second feature means that the first feature is directly below or obliquely below the second feature, or simply means that the level of the first feature is smaller than that of the second feature.

[0073] A number of embodiments or examples are provided in the application of the present application to implement different structures of the present application. To simplify the application of the present application, components and arrangements of particular examples will be described below, which are, of course, examples only and are not intended to limit the present application. Further, reference numerals and / or reference letters may be repeated in different examples of the present application. Such repetition is for the purpose of simplicity and clarity and does not indicate any relationship between various embodiments and / or arrangements in question. In addition, various examples of specific processes and materials are provided in the present application. However, those of ordinary skill in the art may be aware of applications of other processes and / or the use of other materials.

[0074] As illustrated in FIG. 1 and FIG. 2, a burner 100 according to some embodiments in a first aspect of the present application includes a base 12, a gas distribution plate 14, and an outer ring fire cover 16. The gas distribution plate 14 is arranged at the base 12. The outer ring fire cover 16 is arranged at the gas distribution plate 14. An outer ring gas mixing cavity 18 is defined by the outer ring fire cover 16 and the gas distribution plate 14. An outer ring fire hole 20 in communication with the outer ring gas mixing cavity 18 is formed on a circumferential side surface of the outer ring fire cover 16. Flow guide spaces 22 are formed at a junction between the circumferential side surface of the outer ring fire cover 16 and a top surface of the outer ring fire cover 16. The flow guide space 22 is configured to guide secondary air above the outer ring fire cover 16 to the circumferential side surface of the outer ring fire cover 16.

[0075] With the above burner 100, the flow guide space 22 is formed at the junction between the circumferential side surface of the outer ring fire cover 16 and the top surface of the outer ring fire cover 16. The flow guide space 22 can be configured to guide the secondary air above the outer ring fire cover 16 to the circumferential side surface of the outer ring fire cover 16. Therefore, the secondary air can be supplemented to the outer ring fire hole 20, which reduces smoke generated during combustion of the burner 100 and enhances an energy efficiency of the burner 100 to some extent.

[0076] Specifically, the burner 100 may be applied in a cooker. The cooker includes, but is not limited to, a gas cooker, an integrated cooker, an oven, and the like.

[0077] Optionally, in the embodiments illustrated in the figures, the base 12 may be a bottom cup. The base 12 has a bottom gas mixing cavity 24. A nozzle mounting base 26 is provided in the bottom gas mixing cavity 24. A nozzle may be mounted at the nozzle mounting base 26. An outer surface of the base 12 has a port 28 that may be connected to a gas transmission pipeline. In other embodiments, the base 12 may include an ejection tube.

[0078] The gas distribution plate 14 is arranged at the base 12. A primary air intake channel may be formed between the gas distribution plate 14 and the base 12. The burner 100 according to the embodiments of the present application may be an upside-entrainment burner. In the upside-entrainment burner, the primary air intake channel is located above a panel of a cooker, which can allow sufficient primary air to be supplemented to the burner 100, reducing the smoke generated during the combustion of the burner 100, and enhancing the energy efficiency of the burner 100. It should be understood that the burner 100 of the present application is not limited to the upside-entrainment burner.

[0079] Optionally, in FIG. 3, the gas distribution plate 14 includes an outer ring portion 30, an intermediate portion 32, and a connection portion 34. The outer ring portion 30 is arranged around the intermediate portion 32. The connection portion 34 is configured to connect the outer ring portion 30 and the intermediate portion 32. As illustrated in FIG. 4 and FIG. 6, the outer ring portion 30 has a first outer ring cavity 36, and the intermediate portion 32 has an intermediate cavity 38. A bottom of the intermediate cavity 38 has an ejection channel 40. Optionally, the ejection channel 40 is corresponding to the nozzle mounting base 26 in an axial direction of the burner 100. The axial direction of the burner 100 may be an up-down direction as illustrated in the figures. Optionally, the intermediate portion 32 has an inner ring fire hole 42 in communication with the intermediate cavity 38.

[0080] The connection portion 34 has a connection channel in communication with the first outer ring cavity 36 and the intermediate cavity 38.

[0081] The outer ring fire cover 16 is arranged at the gas distribution plate 14 and has a second outer ring cavity 44. An outer ring gas mixing cavity 18 is defined by the first outer ring cavity 36 and the second outer ring cavity 44. Optionally, in other embodiments, the outer ring fire cover 16 may have no second outer ring cavity 44. The outer ring fire cover 16 is directly covered over the gas distribution plate 14, for covering a top opening of the first outer ring cavity 36 to form the outer ring gas mixing cavity 18.

[0082] The outer ring fire hole 20 is formed on the circumferential side surface of the outer ring fire cover 16, and is in communication with the outer ring gas mixing cavity 18. The burner 100 further includes an ignition needle 46 and a thermocouple 48, which are connected to the base 12. Optionally, as illustrated in FIG. 3, the thermocouple 48 is arranged close to the circumferential side surface of the outer ring fire cover 16 and opposite to the outer ring fire hole 20.

[0083] Optionally, the burner 100 has an accommodation groove 50 located at a circumferential side surface of the gas distribution plate 14 and the circumferential side surface of the outer ring fire cover 16. A top of the ignition needle 46 is located in the accommodation groove 50. The accommodation groove 50 may be in communication with the outer ring gas mixing cavity 18.

[0084] When the burner 100 is in operation, a gas is ejected from the nozzle towards the bottom gas mixing cavity 24, creating a negative pressure in the bottom gas mixing cavity 24. The negative pressure draws primary air from the primary air intake channel into the bottom gas mixing cavity 24. The primary air is mixed with the gas in the bottom gas mixing cavity 24 to form a gas mixture of the gas and the air. The gas mixture enters the intermediate cavity 38 from the ejection channel 40. A part of the gas mixture is ejected through the inner ring fire hole 42 and burns to form inner ring fire. Another part of the gas mixture enters the outer ring gas mixing cavity 18 through the connection channel, is ejected from the outer ring fire hole 20, is ignited by the ignition needle 46, and burns to form outer ring fire.

[0085] In some embodiments 22, the flow guide space 22 is formed at the junction between the circumferential side surface of the outer ring fire cover 16 and the top surface of the outer ring fire cover 16. The flow guide space 22 is configured to guide secondary air above the outer ring fire cover 16 to the circumferential side surface of the outer ring fire cover 16. When the outer ring fire hole 20 consumes air from the circumferential side surface of the outer ring fire cover 16 during combustion, the flow guide space 22 can direct the secondary air above the outer ring fire cover 16 to the circumferential side surface of the outer ring fire cover 16, to supplement the secondary air to the outer ring fire in a timely manner. Therefore, more complete combustion of the outer ring fire is realized, which increases a burning rate of the gas mixture, reduces or even eliminates yellow flames, decreases the smoke generated during the combustion of the burner 100, and enhances the energy efficiency of the burner 100. Further, cost reduction and efficiency improvement can be realized. The burner 100 has a low smoke concentration and a high energy efficiency during the combustion, which can meet related requirements.

[0086] Optionally, the burner 100 according to the embodiments of the present application may be a two-ring fire burner or a three-ring fire burner. The present application is not specifically limited to any of these examples. In the embodiments illustrated in the figures, the burner 100 is the three-ring fire burner. The outer ring fire cover 16 has a middle ring fire hole at a side of the outer ring fire cover 16 close to the intermediate portion 32. The middle ring fire hole is in communication with the outer ring gas mixing cavity 18.

[0087] In some embodiments, the flow guide space 22 is a groove formed at the junction between the circumferential side surface of the outer ring fire cover 16 and the top surface of the outer ring fire cover 16.

[0088] Therefore, the secondary air above the outer ring fire cover 16 can be directed to the circumferential side surface of the outer ring fire cover 16 through the groove.

[0089] Optionally, in other embodiments, the flow guide space 22 may also be formed in a form of a through hole.

[0090] In some embodiments, the groove has a width that gradually increases in a direction away from a bottom of the groove.

[0091] Therefore, the outer ring fire cover 16 can be easily separated from a tool, which enhances a manufacturing efficiency of the burner 100.

[0092] Specifically, the groove at the outer ring fire cover 16 can be manufactured through tool forging. Since the width of the groove gradually increases in the direction away from the bottom of the groove, the tool can be more easily separated from the outer ring fire cover 16 after the groove is formed through the tool forging, which enhances the manufacturing efficiency of the burner 100.

[0093] In the present application, the width of the groove is not specifically limited and can be determined as desired.

[0094] In some embodiments, the groove is obliquely connected, obliquely relative to a horizontal plane, to the circumferential side surface of the outer ring fire cover 16 and the top surface of the outer ring fire cover 16.

[0095] Therefore, a flow speed of the secondary air can be accelerated.

[0096] Specifically, since the groove is obliquely connected, obliquely relative to the horizontal plane, to the circumferential side surface of the outer ring fire cover 16 and the top surface of the outer ring fire cover 16, the secondary air above the outer ring fire cover 16 can be guided to the circumferential side surface of the outer ring fire cover 16 along the oblique groove. The secondary air flowing in the inclined groove encounters a short flow path and a low flow resistance, in such a manner that the secondary air can flow from the top surface of the outer ring fire cover 16 to the circumferential side surface of the outer ring fire cover 16 more quickly, increasing a flow speed of the secondary air.

[0097] Optionally, in the embodiments illustrated in the figures, a bottom of the groove is a flat surface, which can further reduce a resistance to flowing of an airflow. In the present application, a width of the bottom of the groove is not specifically limited. Optionally, in an example, the width W of the bottom of the groove is > 2 mm.

[0098] In the present application, an inclination angle of the groove is not specifically limited and can be determined as desired.

[0099] In some embodiments, the groove includes first grooves 52 and second grooves 54, the first grooves 52 are divided to a first groove group 56 in a circumferential direction of the burner 100. One second groove 54 of the second grooves 54 is arranged between two adjacent first groove groups 56 of first groove groups 56, and each of the second grooves 54 has a greater width than each of the first grooves 52.

[0100] In this way, a design of the outer ring fire cover 16 can be adapted to a pot support, further enhancing the energy efficiency of the burner 100.

[0101] Specifically, in a case, the burner 100 is applied in the cooker. The cooker includes the pot support, which can be placed on a panel and arranged around the burner 100. The pot support includes a plurality of support arms arranged at intervals in the circumferential direction P of the burner 100. The plurality of support arms are configured to support a pot to enable the pot to be stably placed above the burner 100.

[0102] Due to obstruction of the plurality of support arms, flames generated during the operation of the burner 100 cannot directly heat parts of the pot that are in contact with the plurality of support arms. Therefore, regions of the circumferential side surface of the outer ring fire cover 16 corresponding to the plurality of support arms typically have few or no outer ring fire holes 20. Since the width W2 of the second groove 54 is large, a part or all of the regions of the circumferential side surface of the outer ring fire cover 16 corresponding to the plurality of support arms can be covered. In this way, the second groove 54 can also guide the secondary air in the vicinity of the plurality of support arms to the circumferential side surface of the outer ring fire cover 16, which increases a secondary air supplement amount for the outer ring fire holes 20 in the vicinity of the plurality of support arms to a certain extent, further enhancing the energy efficiency of the burner 100.

[0103] The second grooves 54 may be in a one-to-one correspondence to the plurality of support arms. In FIG. 2, four first groove groups 56 are provided. One second groove 54 is arranged between two adjacent first groove groups 56 in the circumferential direction P of the burner 100, and thus a total of four second grooves 54 are formed, which correspond to a pot support having four support arms. A quantity of first grooves 52 of each first groove group 56 may be the same or different.

[0104] Optionally, the width W2 of the second groove 54 is greater than a width of the support arm.

[0105] In some embodiments, in an axial direction of the burner 100, one part of the circumferential side surface of the outer ring fire cover 16 corresponding to the second groove 54 is a second region 58, and the remaining part of the circumferential side surface of the outer ring fire cover 16 is a first region 60. The second region 58 has a smaller fire hole density than the first region 60.

[0106] In this way, the energy efficiency of the burner 100 can be further enhanced.

[0107] Specifically, in a case, the burner 100 is applied in the cooker. The cooker includes the pot support, which can be placed on a panel and arranged around the burner 100. The pot support includes a plurality of support arms arranged at intervals in the circumferential direction P of the burner 100. The plurality of support arms are configured to support a pot to enable the pot to be stably placed above the burner 100.

[0108] Due to obstruction of the plurality of support arms, flames generated during the operation of the burner 100 cannot directly heat parts of the pot that are in contact with the plurality of support arms. Therefore, in the circumferential direction of the burner 100, regions of the circumferential side surface of the outer ring fire cover 16 corresponding to the plurality of support arms typically have few or no outer ring fire holes 20, which enables the second region 58 to have a smaller fire hole density than the first region 60.

[0109] Due to the small fire hole density of the second region 58, more of the gas mixture in the outer ring gas mixing cavity 18 can be ejected from the outer ring fire holes 20 of the first region 60. In this way, the outer ring fire holes 20 of the first region 60 have high combustion power, further enhancing the energy efficiency of the burner 100.

[0110] In some embodiments, a plurality of outer ring fire holes 20 are arranged into a first fire hole row 62 in the circumferential direction P of the burner 100, and a plurality of outer ring fire holes 20 are arranged into a second fire hole row 64 in the circumferential direction P of the burner 100. The first fire hole row 62 and the second fire hole row 64 are spaced apart from each other in an axial direction of the burner 100. The plurality of outer ring fire holes 20 of the first fire hole row 62 are offset from the plurality of outer ring fire holes 20 of the second fire hole row 64 in the axial direction of the burner 100.

[0111] In this way, the energy efficiency of the burner 100 can be guaranteed to a certain extent.

[0112] Specifically, in FIG. 5, the first fire hole row 62 is an upper fire hole row, while the second fire hole row 64 is a lower fire hole row. The outer ring fire holes 20 of the lower fire hole row are offset from the outer ring fire holes 20 of the upper fire hole row in the axial direction (e.g., an up-down direction) of the burner 100. In the circumferential direction P of the burner 100, if the two adjacent outer ring fire holes 20 are spaced apart from each other at a small distance, a part of the burner 100 between the two adjacent outer ring fire holes 20 is thin. Therefore, during the combustion of the burner 100, the part is likely to be deformed to compress the outer ring fire holes 20, causing the outer ring fire holes 20 to become smaller. Consequently, the energy efficiency of the burner 100 is reduced. If the two adjacent outer ring fire holes 20 are spaced apart from each other at a large distance, a quantity of the outer ring fire holes 20 is greatly limited, which in turn affects the energy efficiency of the burner 100.

[0113] In this embodiment, since the outer ring fire holes 20 of the upper fire hole row are offset from the outer ring fire holes 20 of the lower fire hole row in the axial direction of the burner 100, the outer ring fire holes 20 of the upper fire hole row and the outer ring fire holes 20 of the lower fire hole row are at farther distances, and two adjacent outer ring fire holes 20 of a same fire hole row are also at a farther distance. Therefore, in a case where the part of the burner 100 between two adjacent outer ring fire holes 20 is thick, more outer ring fire holes 20 can also be arranged to ensure the energy efficiency of the burner 100 to a certain extent.

[0114] In some embodiments, the first fire hole row 62 is closer to a top of the outer ring fire cover 16 than the second fire hole row 64. The plurality of outer ring fire holes 20 of the first fire hole row 62 are located between two adjacent flow guide spaces 22 in the circumferential direction P of the burner 100. Each of the plurality of outer ring fire holes 20 of the second fire hole row 64 is corresponding to the flow guide space 22 in the axial direction of the burner 100.

[0115] In this way, sufficient secondary air supplement to each outer ring fire hole 20 can be guaranteed to a certain extent.

[0116] Specifically, in FIG. 5, the first fire hole row 62 is an upper fire hole row, while the second fire hole row 64 is a lower fire hole row. The flow guide space 22 is formed at the junction between the circumferential side surface of the outer ring fire cover 16 and the top surface of the outer ring fire cover 16. Since the outer ring fire holes 20 of the upper fire hole row are offset from the outer ring fire holes 20 of the lower fire hole row in the axial direction (up-down direction) of the burner 100, the outer ring fire holes 20 of the upper fire hole row are located between two adjacent flow guide spaces 22 in the circumferential direction P of the burner 100, while the outer ring fire holes 20 of the lower fire hole row correspond to the flow guide spaces 22 in the circumferential direction of the burner 100. In this way, distances between the outer ring fire holes 20 of the upper fire hole row and the flow guide spaces 22 and distances between the outer ring fire holes 20 of the lower fire hole row and the flow guide spaces 22 are approximately the same, which can guarantee the sufficient secondary air supplement to each outer ring fire hole 20 a certain extent.

[0117] It should be understood that, in other embodiments, the first fire hole row 62 is not limited to the upper fire hole row, while the second fire hole row 64 is not limited to the lower fire hole row.

[0118] In some embodiments, the burner 100 further includes a flame stabilization groove 66 in a ring shape. The flame stabilization groove 66 is located at a side of the outer ring fire hole 20 away from the outer ring fire cover 16, and is in communication with the outer ring gas mixing cavity 18.

[0119] In this way, combustion at the outer ring fire hole 20 can be made more stable.

[0120] Specifically, the flame stabilization groove 66 penetrates the circumferential side surface of the outer ring fire cover 16 in the circumferential direction P of the burner 100. The flame stabilization groove 66 is located below the outer ring fire hole 20. Optionally, the flame stabilization groove 66 is arranged substantially horizontally.

[0121] When the burner 100 is in operation, the gas mixture in the outer ring gas mixing cavity 18 can flow into the flame stabilization groove 66. A flame defined by combustion of the gas mixture in the flame stabilization groove 66 can stabilize an origin of a flame defined by the combustion at the outer ring fire hole 20, which can avoid flame detachment and flame extinction occurred during the combustion at the outer ring fire hole 20 to a certain extent, making the combustion at the outer ring fire hole 20 more stable.

[0122] A cooker according to the embodiments of the present application includes the burner 100 according to any of the above embodiments.

[0123] With the above cooker, the flow guide space 22 is formed at the junction between the circumferential side surface of the outer ring fire cover 16 and the top surface of the outer ring fire cover 16. The flow guide space 22 can be configured to guide the secondary air above the outer ring fire cover 16 to the circumferential side surface of the outer ring fire cover 16. Therefore, the secondary air can be supplemented to the outer ring fire hole 20, which reduces the smoke generated during the combustion of the burner 100 and enhances the energy efficiency of the burner 100 to some extent.

[0124] Specifically, the burner 100 may be applied in a cooker. The cooker includes, but is not limited to, a gas cooker, an integrated cooker, an oven, and the like.

[0125] The cooker includes a panel having an opening. The burner 100 passes through the opening to extend above the panel. Further, the panel is provided with a pot support arranged around the burner 100. The pot support is used for stable placement of the pot above the burner 100.

[0126] In the related art, the burner includes a base and a gas distribution plate arranged at the base. The base has a bottom gas mixing cavity. A gas in the bottom gas mixing cavity is mixed with primary air to form a gas mixture. The gas mixture is ejected from a fire hole of the burner and then ignited to form flames. After the gas mixture in the fire hole burns, secondary air needs to be continuously supplemented to ensure complete combustion of the gas mixture. If the primary air and the secondary air are insufficiently supplemented, performance of the burner will be degraded.

[0127] To solve the above technical problems, according to some embodiments in a second aspect of the present application, a burner is provided by the present application. The burner includes: a base; a gas distribution plate arranged at the base and including an intermediate portion and an outer ring portion connected to the intermediate portion, the outer ring portion being arranged around the intermediate portion, and the intermediate portion having an inner ring gas mixing cavity and an inner ring fire hole in communication with the inner ring gas mixing cavity; and an outer ring fire cover arranged at the outer ring portion. An outer ring gas mixing cavity is defined by the outer ring fire cover and the outer ring portion. The outer ring fire cover has an outer ring fire hole in communication with the outer ring gas mixing cavity.

[0128] In some embodiments, the gas distribution plate includes an ejection tube connected at a side of the intermediate portion facing the base. The ejection tube has an ejection channel in communication with the inner ring gas mixing cavity. The intermediate portion includes a top plate facing the ejection channel. The inner ring fire hole penetrates the top plate.

[0129] In some embodiments, an outer surface of the top plate of the intermediate portion includes a central region and a peripheral region. The peripheral region is configured to connect the central region and a circumferential side surface of the intermediate portion in a circumferential direction of the burner. The inner ring fire hole penetrates the peripheral region. The central region is arranged in a horizontal direction. The peripheral region is inclined, with respect to the central region, towards the base by an angle ranging from 10° to 30°.

[0130] In some embodiments, the gas distribution plate includes a plurality of connection portions arranged at intervals in the circumferential direction of the burner. The plurality of connection portions are configured to connect the intermediate portion and the outer ring portion. In an axial direction of the burner, the inner ring fire hole is corresponding to a gap between two adjacent connection portions of the plurality of connection portions.

[0131] In some embodiments, the gas distribution plate is provided with a plurality of ribs at a side of the gas distribution plate away from the outer ring fire cover. The plurality of ribs are arranged at intervals in the circumferential direction of the burner. An air channel is formed between two adjacent ribs of the plurality of ribs. The air channel includes primary air channels and secondary air channels that are alternately arranged in the circumferential direction of the burner. The base has a bottom gas mixing cavity. The primary air channels are in communication with the bottom gas mixing cavity. The secondary air channels are in communication with the gap between the two adjacent connection portions of the plurality of connection portions.

[0132] In some embodiments, for the two adjacent ribs that form a respective air channel, a surface of each of the two adjacent ribs towards the respective air channel is provided with one arc-shaped protrusion in a region close to an air channel air inlet.

[0133] In some embodiments, the gas distribution plate is provided with a guide mounting structure at a surface of the gas distribution plate facing the base. The base has the bottom gas mixing cavity. The guide mounting structure includes a plurality of guide blocks arranged at intervals in the circumferential direction of the burner and in contact or clearance fit with a surface of the base facing towards the bottom gas mixing cavity.

[0134] In some embodiments, each of the plurality of guide blocks has a bottom surface, a side surface, and an inclined surface. The inclined surface is obliquely connected to the bottom surface from the side surface towards a central axis of the burner.

[0135] In some embodiments, the outer ring fire hole is arranged at the circumferential side surface of the outer ring fire cover. Flow guide spaces are formed at a junction between the circumferential side surface of the outer ring fire cover and a top surface of the outer ring fire cover. The flow guide space is configured to guide secondary air above the outer ring fire cover to the circumferential side surface of the outer ring fire cover.

[0136] A cooker according to an embodiment of the present application includes the burner according to any of the above embodiments.

[0137] Specifically, as illustrated in FIG. 7 to FIG. 16, a burner 200 according to an embodiment of the present application includes a base 102, a gas distribution plate 104, and an outer ring fire cover 106. The gas distribution plate 104 is arranged at the base 102 and includes an intermediate portion 108 and an outer ring portion 110. The intermediate portion 108 is connected to the outer ring portion 110. The outer ring portion 110 is arranged around the intermediate portion 108. The intermediate portion 108 has an inner ring gas mixing cavity 112 and an inner ring fire hole 114 in communication with the inner ring gas mixing cavity 112. The outer ring fire cover 106 is arranged at the outer ring portion 110. An outer ring gas mixing cavity 116 is defined by the outer ring fire cover 106 and the outer ring portion 110. The outer ring fire cover 106 has an outer ring fire hole 118 in communication with the outer ring gas mixing cavity 116.

[0138] With the above burner 200, the intermediate portion 108 of the gas distribution plate 104 has the inner ring gas mixing cavity 112 and the inner ring fire hole 114, which can eliminate a need for the inner ring fire cover to reduce material usage of the burner 200, achieving a purpose of cost reduction and efficiency improvement.

[0139] Specifically, in an embodiment, the burner 200 may be an upside-entrainment burner. The base 102 may serve as a bottom cup of the burner 200. The base 102 has a bottom gas mixing cavity 120. The base 102 is further provided with a connection pipe 122 configured to be connected to a gas pipeline. A nozzle mounting base 124 is provided in the bottom gas mixing cavity 120. A nozzle may be mounted at the nozzle mounting base 124. The gas enters the connection pipe 122 through the gas pipeline. The connection pipe 122 is configured to convey the gas to the nozzle. The nozzle can inject the gas into the bottom gas mixing cavity 120. Optionally, in other embodiments, the burner 200 may be a downside-entrainment burner. The base 102 may serve as a burner head, which may include the ejection tube. In the present application, a material of the burner 200 is not specifically limited. Optionally, the burner 200 may be made of copper.

[0140] The gas distribution plate 104 is arranged at the base 102, and serves to distribute the gas mixture of the gas and air to the inner ring fire hole 114 and the outer ring fire hole 118. Specifically, the gas distribution plate 104 includes the intermediate portion 108 and the outer ring portion 110. The intermediate portion 108 is connected to the outer ring portion 110. The outer ring portion 110 is arranged around the intermediate portion 108. The intermediate portion 108 has the inner ring gas mixing cavity 112 and the inner ring fire hole 114 in communication with the inner ring gas mixing cavity 112. The gas mixture may enter the inner ring gas mixing cavity 112 from the bottom gas mixing cavity 120 and be ejected from the inner ring fire hole 114.

[0141] In the related art, the intermediate portion of the gas distribution plate has a cavity. A top of the cavity has an opening. The burner further includes an inner ring fire cover having an inner ring fire hole. The inner ring fire cover is arranged at the intermediate portion and covers the opening. In this way, an inner ring gas mixing cavity is defined by the inner ring fire cover and the intermediate portion. To mount the inner ring fire cover, the cavity of the intermediate portion has a large wall thickness for an arrangement of a first mounting step, and the inner ring fire cover is provided with a second mounting step. The first mounting step is engaged with and connected to the second mounting step to assemble the inner ring fire cover to the intermediate portion. However, such an assembly method makes more materials used to manufacture the burner, resulting in higher costs of the burner.

[0142] In the embodiments of the present application, since the inner ring gas mixing cavity 112 and the inner ring fire hole 114 are directly formed at the intermediate portion 108, i.e., the inner ring fire hole 114 is directly formed at a top surface of the intermediate portion 108, a need for the inner ring fire cover can be eliminated. Consequently, a mounting structure required for an engagement with the inner ring fire cover has no need to be manufactured at the intermediate portion 108, which in turn reduces material usage and lowers costs of the burner 200, achieving the purpose of cost reduction and efficiency improvement. In an example, the burner 200 may be made of copper. The burner 200 according to the embodiments of the present application may reduce copper usage by 10% to 20%.

[0143] The outer ring fire cover 106 is arranged at the outer ring portion 110. Specifically, the outer ring fire cover 106 has a first chamber 126. The outer ring portion 110 has a second chamber 128. A bottom of the first chamber 126 has an opening, while a top of the second chamber 128 has an opening. When the outer ring fire cover 106 is arranged at the outer ring portion 110, the first chamber 126 is in communication with the second chamber 128 to form the outer ring gas mixing cavity 116. The gas mixture of the air and the gas can be conveyed from the inner ring gas mixing cavity 112 to the outer ring gas mixing cavity 116 and then ejected from the outer ring fire hole 118. Optionally, in other embodiments, the outer ring fire cover 106 may have no first chamber 126. The outer ring fire cover 106 may be directly covered over the outer ring portion 110, for covering the opening at the top of the second chamber 128 to form the outer ring gas mixing cavity 116.

[0144] Optionally, the burner 200 further includes a thermocouple 130 and an ignition needle 132 that are arranged at the base 102. The thermocouple 130 may be arranged close to a circumferential side surface of the outer ring fire cover 106 and opposite to the outer ring fire hole 118. Optionally, the burner according to the embodiments of the present application may be a two-ring fire burner or a three-ring fire burner. The present application is not specifically limited to any of these examples. In the embodiments illustrated in the figures, the burner 200 is the three-ring fire burner. The outer ring fire cover 106 has a middle ring fire hole at a side of the outer ring fire cover 106 close to the intermediate portion 108. The middle ring fire hole is in communication with the outer ring gas mixing cavity 116.

[0145] A primary air channel 134 is formed between the gas distribution plate 104 and the base 102 and is in communication with the bottom gas mixing cavity 120. For the upside-entrainment burner, an inlet of the primary air channel 134 is located above the panel of the cooker. When the burner 200 is in operation, the gas is ejected from the nozzle towards the bottom gas mixing cavity 120, creating a negative pressure in the bottom gas mixing cavity 120. The negative pressure draws primary air from the primary air channel 134 into the bottom gas mixing cavity 120. The primary air is mixed with the gas in the bottom gas mixing cavity 120 to form the gas mixture of the gas and the air. The gas mixture enters the inner ring gas mixing cavity 112. A part of the gas mixture is ejected through the inner ring fire hole 114 and burns to form inner ring fire. Another part of the gas mixture enters the outer ring gas mixing cavity 116, is ejected from the outer ring fire hole 118, is ignited by the ignition needle 132, and burns to form outer ring fire.

[0146] In some embodiments, as illustrated in FIG. 12 to FIG. 14, the gas distribution plate 104 includes an ejection tube 136 connected at a side of the intermediate portion 108 facing the base 102. The ejection tube 136 has an ejection channel 138 in communication with the inner ring gas mixing cavity 112. The intermediate portion 108 includes a top plate 140 facing the ejection channel 138. The inner ring fire hole 114 penetrates the top plate 140.

[0147] In this way, through forming the inner ring fire hole 114 at the top plate 140, a heating efficiency of the burner 200 can be improved.

[0148] When the burner 200 is in operation, the gas is ejected from the nozzle towards the bottom gas mixing cavity 120, creating a negative pressure in the bottom gas mixing cavity 120. The negative pressure draws primary air from the primary air channel 134 into the bottom gas mixing cavity 120. The primary air is mixed with the gas in the bottom gas mixing cavity 120 to form the gas mixture of the gas and the air. The gas mixture may enter the inner ring gas mixing cavity 112 through the ejection channel 138.

[0149] The gas mixture of the gas and the air is ejected from the inner ring fire hole 114 and ignited to form the inner ring fire. Since the inner ring fire hole 114 penetrates the top plate 140, an outlet of the inner ring fire hole 114 is located at an outer surface of the top plate 140, and thus the formed inner ring fire hole 114 is located at the outer surface of the top plate 140. Therefore, a distance between the inner ring fire defined by the inner ring fire hole 114 penetrating the top plate 140 of the intermediate portion 108 and the pot is shorter than that in a case where the inner ring fire hole 114 is formed at a circumferential side surface of the intermediate portion 108, improving the heating efficiency of the burner 200.

[0150] In some embodiments, as illustrated in FIG. 12 and FIG. 13, an outer surface of the top plate 140 of the intermediate portion 108 includes a central region 142 and a peripheral region 144. The peripheral region 144 is configured to connect the central region 142 and a circumferential side surface of the intermediate portion 108 in a circumferential direction P of the burner 200. The inner ring fire hole 114 penetrates the peripheral region 144. The central region 142 is arranged in a horizontal direction. The peripheral region 144 is inclined, with respect to the central region 142, towards the base 102 by an angle ranging from 10° to 30°.

[0151] As a result, drainage of a liquid dripping onto the intermediate portion 108 is facilitated.

[0152] Specifically, during cooking, the pot may be placed above the burner 200 by the pot support. During the cooking, the pot may spill a liquid (such as soup) due to boiling. The liquid drips onto the intermediate portion 108, may slide along the inclined peripheral region 144 onto the circumferential side surface of the intermediate portion 108, and then slide onto the panel of the cooker. The inclined peripheral region 144 facilitates the drainage of the liquid. Since the peripheral region 144 is inclined with respect to the central region 142 by the angle ranging from 10° to 30°, a distance between the inner ring fire and a bottom of the pot being too large due to the large angle of the peripheral region 144 can be avoided.

[0153] The angle C ranges from 10° to 30°, i.e., 10°≤C≤30°. In some examples, C=10°, 12°, 15°, 20°, 25°, 28°, 30°, or other values ranging from 10° to 30°.

[0154] Optionally, an acute angle is formed between an axial direction of the inner ring fire hole 114 and a vertical direction. The inner ring fire hole 114 is obliquely arranged, in such a manner that the outlet of the inner ring fire hole 114 is obliquely upwards towards the bottom of the pot. The inner ring fire formed after the gas mixture ejected from the inner ring fire hole 114 is ignited is in oblique upward contact with the bottom of the pot. Therefore, the inner ring fire forms a large contact area with the pot, which enlarges a heating area of the inner ring fire, allowing the pot to be heated more evenly.

[0155] In some embodiments, as illustrated in FIG. 9, the gas distribution plate 104 includes a plurality of connection portions 146 arranged at intervals in the circumferential direction P of the burner 200. The plurality of connection portions 146 are configured to connect the intermediate portion 108 and the outer ring portion 110. In an axial direction of the burner 200, the inner ring fire hole 114 is corresponding to a gap 150 between two adjacent connection portions 146 of the plurality of connection portions 146.

[0156] In this way, a certain amount of secondary air can be supplemented to the inner ring fire hole 114, guaranteeing the energy efficiency of the burner 200 to a certain extent.

[0157] Specifically, the connection portion 146 has a connection chamber 148 in communication with the inner ring gas mixing cavity 112 and the outer ring gas mixing cavity 116. Apart of the gas mixture of the gas and the air can be ejected from the inner ring fire hole 114. Another part of the gas mixture of the gas and the air can be conveyed from the inner ring gas mixing cavity 112 to the outer ring gas mixing cavity 116 through the connection chamber 148, and ejected from the outer ring fire hole 118.

[0158] When combustion takes place at the inner ring fire hole 114, air around the inner ring fire hole 114 is consumed. Therefore, the secondary air needs to be supplemented for the combustion taken place the inner ring fire hole 114. Otherwise, inadequate combustion occurs, which leads to a high smoke concentration during the combustion of the burner 200 and a low energy efficiency, failing to meet related requirements.

[0159] In the axial direction of the burner 200, the inner ring fire hole 114 is corresponding to a gap 150 between two adjacent connection portions 146 of the plurality of connection portions 146, which enables the secondary air to be supplemented upwards from the gap 150 to the vicinity of the inner ring fire hole 114. In this way, a certain amount of secondary air can be supplemented to the inner ring fire hole 114, to reduce the smoke concentration during the operation of the burner 200 to a certain extent, and to ensure the energy efficiency of the burner 200.

[0160] In some embodiments, as illustrated in FIG. 11 and FIG. 16, the gas distribution plate 104 is provided with a plurality of ribs 152 at a side of the gas distribution plate 104 away from the outer ring fire cover 106. The plurality of ribs 152 are arranged at intervals in the circumferential direction P of the burner 200. An air channel is formed between two adjacent ribs 152 of the plurality of ribs 152. The air channel includes primary air channels 134 and secondary air channels 154 that are alternately arranged in the circumferential direction P of the burner 200. The base 102 has a bottom gas mixing cavity 120. The primary air channels 134 are in communication with the bottom gas mixing cavity 120. The secondary air channels 154 are in communication with the gap 150 between the two adjacent connection portions 146 of the plurality of connection portions 146.

[0161] Therefore, a regular air channel can be formed, which is beneficial to smooth circulation of the air.

[0162] Specifically, the primary air channels 134 are in communication with the bottom gas mixing cavity 120. After the gas is injected into the bottom gas mixing cavity 120 from the nozzle, the air in the bottom gas mixing cavity 120 is driven to flow upwards and mix with the gas. When the air flows upwards, a negative pressure is formed in the bottom gas mixing cavity 120. The negative pressure can draw the primary air from the primary air channel 134 to enable the primary air to flow downwards into the bottom gas mixing cavity 120, in such a manner that the bottom gas mixing cavity 120 can be effectively supplemented with the primary air.

[0163] The primary air channel 134 is defined by two adjacent ribs 152, in such a manner that the primary air can be quickly supplemented into the bottom gas mixing cavity 120 along the primary air channel 134, which prevents a flow resistance from being increased due to interference between the primary air and the secondary air.

[0164] The secondary air channels 154 are in communication with the gap 150 between the two adjacent connection portions 146 of the plurality of connection portions 146. When combustion takes place at the inner ring fire hole 114, the secondary air may flow into the gap from the secondary air channel 154 and flow upwards from the gap to the vicinity of the inner ring fire hole 114, supplementing the secondary air to the inner ring fire hole 114. The secondary air channel 154 is defined by two adjacent ribs 152, in such a manner that the secondary air can be quickly supplemented to the vicinity of the inner ring fire hole 114 along the secondary air channel 154, which prevents the flow resistance from being increased due to the interference between the secondary air and the primary air.

[0165] The primary air channels 134 and the secondary air channels 154 are alternately arranged in the circumferential direction P of the burner 200, in such a manner that the primary air and the secondary air can be respectively supplemented to the bottom gas mixing cavity 120 and the inner ring fire hole 114 in the circumferential direction P of the burner 200, improving an efficiency of supplementing the primary air and the secondary air.

[0166] In some embodiments, as illustrated in FIG. 11 and FIG. 16, for the two adjacent ribs 152 that form a respective air channel, a surface of each of the two adjacent ribs 152 towards the respective air channel is provided with one arc-shaped protrusion 156 in a region close to an air channel air inlet.

[0167] Therefore, the arc-shaped protrusion 156 can reduce a resistance to air flow.

[0168] Specifically, in an embodiment, as illustrated in FIG. 15 and FIG. 16, the gas distribution plate 104 includes a first portion 158 and a second portion 160, which are fixedly connected by a fastener 162, such as a screw. More specifically, the first portion 158 has a second cavity 128. A bottom of the second cavity 128 has a first mounting hole 164. The second portion 160 has a second mounting hole 166. The fastener 162 is configured to penetrate the first mounting hole 164 and the second mounting hole 166 and fixedly connect the first portion 158 and the second portion 160.

[0169] To ensure connection strength between the first portion 158 and the second portion 160 to a certain extent, the one arc-shaped protrusion 156 is disposed at the surface of each of the two adjacent ribs 152 towards the respective air channel in the region close to the air channel air inlet. The second mounting hole 166 may extend to the arc-shaped protrusion 156 and be formed as a blind hole, in such a manner that a long connection portion 146 can be defined by the fastener 162 with the second portion 160.

[0170] In the embodiments illustrated in the figures, the arc-shaped protrusion 156 is formed at a surface of the rib 152 towards the primary air channel 134 in a region close to an air inlet of the primary air channel 134. Since the arc-shaped protrusion 156 is located at the surface of the rib 152 towards the primary air channel 134, the primary air enters the bottom gas mixing cavity 120 from the primary air channel 134 when the burner 200 is in operation. When flowing through the arc-shaped protrusion 156, the primary air can flow along an arc-shaped surface of the arc-shaped protrusion 156, reducing a flow resistance of the primary air.

[0171] In other embodiments, the arc-shaped protrusion 156 is formed at a surface of the rib 152 towards the secondary air channel 154 in a region close to an air inlet of the secondary air channel 154. Since the arc-shaped protrusion 156 is located at the surface of the rib 152 towards the secondary air channel 154, the secondary air enters the gap 150 between the two adjacent connection portions 146 from the secondary air channel 154 when the burner 200 is in operation. When flowing through the arc-shaped protrusion 156, the secondary air can flow along the arc-shaped surface of the arc-shaped protrusion 156, reducing a flow resistance of the secondary air.

[0172] In some embodiments, as illustrated in FIG. 11 and FIG. 14, the gas distribution plate 104 is provided with a guide mounting structure 168 at a surface of the gas distribution plate 104 facing the base 102. The base 102 has the bottom gas mixing cavity 120. The guide mounting structure 168 includes a plurality of guide blocks 170 arranged at intervals in the circumferential direction P of the burner 200 and in contact or clearance fit with a surface of the base 102 towards the bottom gas mixing cavity 120.

[0173] Accordingly, an assembly of the gas distribution plate 104 and the base 102 can be facilitated.

[0174] Specifically, a top of the bottom gas mixing cavity 120 is opened. The gas distribution plate 104 may be mounted at the base 102 from top to bottom, The guide mounting structure 168 is capable of adjusting a position of the gas distribution plate 104 and / or a position of the base 102 through an engagement between the plurality of guide blocks 170 and a side wall of the bottom gas mixing cavity 120 during mounting of the gas distribution plate 104. In this way, the assembly of the gas distribution plate 104 and the base 102 can be facilitated.

[0175] Arranging the plurality of guide blocks 170 at intervals in the circumferential direction P of the burner 200 is beneficial for the guide mounting structure 168 to adjust the position of the gas distribution plate 104 and / or the position of the base 102 in the circumferential direction P of the burner 200.

[0176] Optionally, in an embodiment, the guide block 170 is in contact with the surface of the base 102 towards the bottom gas mixing cavity 120. Therefore, the assembly of the gas distribution plate 104 and the base 102 is relatively tight. Optionally, in an embodiment, the guide block 170 is in clearance fit with the surface of the base 102 towards the bottom gas mixing cavity 120. Therefore, the assembly of the gas distribution plate 104 and the base 102 is relatively efficient.

[0177] In some embodiments, as illustrated in FIG. 14, each of the plurality of guide blocks 170 has a bottom surface 172, a side surface 174, and an inclined surface 176. The inclined surface 176 is obliquely connected to the bottom surface 172 from the side surface 174 towards a central axis L of the burner 200.

[0178] Accordingly, the position of the gas distribution plate 104 and / or the position of the base 102 can be adjusted through the inclined surface 176.

[0179] Specifically, in FIG. 14, the inclined surface 176 is obliquely and downwardly connected to the bottom surface 172 from the side surface 174 towards the central axis L of the burner 200. The bottom surface 172 is closer to the central axis L of the burner 200 than the side surface 174. During the assembly of the gas distribution plate 104 to the base 102, the gas distribution plate 104 is loaded into the base 102 from top to bottom. When a correctable deviation occurs during an alignment between the gas distribution plate 104 and the base 102, the inclined surface 176 of the guide block 170 is in contact with an opening periphery of the bottom gas mixing cavity 120. In this way, the position of the gas distribution plate 104 can be adaptively adjusted towards the central axis L of the burner 200, to enable the guide block 170 to be smoothly inserted into the bottom gas mixing cavity 120 and the gas distribution plate 104 to be correctly assembled to the base 102.

[0180] In some embodiments, as illustrated in FIG. 7 to FIG. 9, the outer ring fire hole 118 is arranged at the circumferential side surface of the outer ring fire cover 106. Flow guide spaces 178 are formed at a junction between the circumferential side surface of the outer ring fire cover 106 and a top surface of the outer ring fire cover 106. The flow guide space 178 is configured to guide secondary air above the outer ring fire cover 106 to the circumferential side surface of the outer ring fire cover 106.

[0181] Therefore, the smoke generated during the combustion of the burner 200 is reduced to a certain extent, and the energy efficiency of the burner 200 is enhanced.

[0182] Specifically, the gas mixture of the gas and the air enters the outer ring gas mixing cavity 116 from the inner ring gas mixing cavity 112 through the connection chamber 148, is ejected from the outer ring fire hole 118, is ignited by the ignition needle 132, and burns to form the outer ring fire.

[0183] The flow guide space 178 formed at the junction between the circumferential side surface of the outer ring fire cover 106 and the top surface of the outer ring fire cover 106 is capable of directing the secondary air above the outer ring fire cover 106 to the circumferential side surface of the outer ring fire cover 16. When the outer ring fire hole 118 consumes air in the vicinity of the circumferential side surface of the outer ring fire cover 106 during the combustion, the flow guide space 178 can direct the secondary air above the outer ring fire cover 106 to the circumferential side surface of the outer ring fire cover 106, to supplement the secondary air to the combustion at the outer ring fire hole 118 in a timely manner. Therefore, more complete combustion of the outer ring fire is realized, which increases the burning rate of the gas mixture, reduces or even eliminates yellow flames, decreases the smoke generated during the combustion of the burner 200, and enhances the energy efficiency of the burner 200. Further, the cost reduction and the efficiency improvement can be realized. The burner 200 has the low smoke concentration and the high energy efficiency during the combustion, which can meet the related requirements.

[0184] Optionally, in FIG. 9, the flow guide space 178 is in a form of a groove that is configured to obliquely (not including vertically) connect the circumferential side surface of the outer ring fire cover 106 and the top surface of the outer ring fire cover 106. Optionally, the groove has a width that gradually increases in a direction away from a bottom of the groove. Optionally, in other embodiments, the flow guide space 178 may be in a form of a through hole.

[0185] Optionally, a plurality of flow guide spaces 178 are formed at the junction between the circumferential side surface of the outer ring fire cover 106 and the top surface of the outer ring fire cover 106, and arranged at intervals in the circumferential direction P of the burner 200. The plurality of outer ring fire holes 118 are formed at the circumferential side surface of the outer ring fire cover 106 in the circumferential direction P of the burner 200. In this way, sufficient secondary air is supplemented to each outer ring fire hole 118.

[0186] Optionally, a plurality of outer ring fire holes 118 are arranged into a first fire hole row in a circumferential direction of the burner 200, and a plurality of outer ring fire holes 118 are arranged into a second fire hole row in the circumferential direction of the burner 200. The first fire hole row and the second fire hole row are spaced apart from each other in the axial direction of the burner 200. The outer ring fire holes 118 of the first fire hole row are offset from the outer ring fire holes 118 of the second fire hole row in the axial direction of the burner 200.

[0187] Optionally, the first fire hole row is closer to a top of the outer ring fire cover 106 than the second fire hole row. The plurality of outer ring fire holes 118 of the first fire hole row are located between two adjacent flow guide spaces 178 in the circumferential direction of the burner 200. Each of the plurality of outer ring fire holes 118 of the second fire hole row is corresponding to the flow guide space 178 in the axial direction of the burner 200.

[0188] A cooker according to the embodiments of the present application includes the burner 200 according to any one of the above embodiments.

[0189] With the above cooker, the intermediate portion 108 of the gas distribution plate 104 has the inner ring gas mixing cavity 112 and the inner ring fire hole 114, which can eliminate a need for the inner ring fire cover to reduce material usage of the burner 200, achieving a purpose of cost reduction and efficiency improvement.

[0190] Specifically, the cooker further includes a panel and a pot support. The panel has an opening. The pot support is disposed at the panel and arranged around the opening. The burner 200 passes through the opening to extend above the panel. The pot support is arranged around the burner 200 and used for stable placement of the pot above the burner 200. The cooker includes, but is not limited to, a gas cooker, an integrated cooker, an oven, and the like.

[0191] In the related art, three-ring fire may be formed during the combustion of the burner. However, when the combustion at the middle ring fire hole is unstable, the smoke concentration of the burner during the combustion is high and the performance is unsatisfactory, which cannot meet requirements.

[0192] To solve the above technical problems, according to some embodiments in a third aspect of the present application, a burner is provided by the present application. The burner includes: a base; a gas distribution plate arranged at the base and including an outer ring portion; and an outer ring fire cover arranged at the outer ring portion. An outer ring gas mixing cavity is defined by the outer ring fire cover and the outer ring portion. The outer ring fire cover has a plurality of middle ring fire holes arranged at intervals in a circumferential direction of the burner. The plurality of middle ring fire holes are in communication with the outer ring gas mixing cavity. A plurality of flame stabilization grooves are formed on a surface of the outer ring portion towards a central axis of the burner. The plurality of flame stabilization grooves are in communication with the outer ring gas mixing cavity. The plurality of flame stabilization grooves are arranged at intervals in the circumferential direction of the burner. The plurality of flame stabilization grooves are arranged in a one-to-one correspondence with the plurality of middle ring fire holes in a direction parallel to the central axis of the burner.

[0193] In some embodiments, the outer ring fire cover includes a top surface and an inclined surface. The inclined surface is connected to an edge of the top surface close to a central axis of the burner and inclined from the top surface towards the base. The middle ring fire holes penetrate the inclined surface.

[0194] In some embodiments, the inclined surface is inclined by an angle ranging from 10° to 30°.

[0195] In some embodiments, the middle ring fire hole is inclined from the outer ring portion towards the central axis of the burner. An angle between an axis of the middle ring fire hole and the central axis of the burner ranges from 40° to 60°.

[0196] In some embodiments, in the direction parallel to the central axis of the burner, a plurality of middle ring fire holes are corresponding to the plurality of flame stabilization grooves, respectively, and the plurality of middle ring fire holes are arranged at intervals in a direction away from the central axis of the burner.

[0197] In some embodiments, the gas distribution plate includes an intermediate portion and a plurality of connection portions. The plurality of connection portions are arranged at intervals in a circumferential direction of the burner and configured to connect the outer ring portion and the intermediate portion. A secondary air channel is defined by two adjacent connection portions of the plurality of connection portions, the outer ring portion, and the intermediate portion. The plurality of flame stabilization grooves are arranged at a surface of the outer ring portion towards the secondary air channel.

[0198] In some embodiments, the outer ring portion includes a first side plate, a bottom plate, and a second side plate. The bottom plate is configured to connect the first side plate and the second side plate. A first cavity is defined by the first side plate, the second side plate, and the bottom plate. The outer ring fire cover has a second cavity. The outer ring gas mixing cavity is defined by the first cavity and the second cavity. The first side plate is closer to the intermediate portion than the second side plate. The first side plate is provided with a first step portion at a surface of the first side plate towards the first cavity. The outer ring fire cover is provided with a second step portion at a surface of the outer ring fire cover faces away from the second cavity. The first step portion is engaged with and connected to the second step portion.

[0199] In some embodiments, the intermediate portion has an inner ring gas mixing cavity and an inner ring fire hole. The inner ring fire hole is in communication with the inner ring gas mixing cavity.

[0200] In some embodiments, the outer ring fire cover has an outer ring fire hole at a circumferential side surface of the outer ring fire cover faces away from the central axis of the burner. The outer ring fire hole is in communication with the outer ring gas mixing cavity. Flow guide spaces are formed at a junction between the circumferential side surface of the outer ring fire cover faces away from the central axis of the burner and a top surface of the outer ring fire cover. The flow guide space is configured to guide secondary air above the outer ring fire cover to the circumferential side surface of the outer ring fire cover faces away from the central axis of the burner.

[0201] A cooker according to an embodiment of the present application includes the burner according to any of the above embodiments.

[0202] Specifically, as illustrated in FIG. 17 to FIG. 20, a burner 300 according to an embodiment of the present application includes a base 202, a gas distribution plate 204, and an outer ring fire cover 206. The gas distribution plate 204 is arranged at the base 202 and includes an outer ring portion 208. The outer ring fire cover 206 is arranged at the outer ring portion 208. An outer ring gas mixing cavity 210 is defined by the outer ring fire cover 206 and the outer ring portion 208. The outer ring fire cover 206 has a plurality of middle ring fire holes 212 arranged at intervals in a circumferential direction P of the burner 300. The plurality of middle ring fire holes 212 are in communication with the outer ring gas mixing cavity 210. A plurality of flame stabilization grooves 214 are formed on a surface of the outer ring portion 208 towards a central axis L of the burner 300. The plurality of flame stabilization grooves 214 are in communication with the outer ring gas mixing cavity 210 and arranged at intervals in the circumferential direction P of the burner 300. The plurality of flame stabilization grooves 214 are arranged in a one-to-one correspondence with the plurality of middle ring fire holes 212 in a direction parallel to the central axis L of the burner 300.

[0203] With the above burner 300, the surface of the outer ring portion 208 towards the central axis L of the burner 300 has the plurality of flame stabilization grooves 214. The plurality of flame stabilization grooves 214 are arranged in a one-to-one correspondence with the plurality of middle ring fire holes 212 in the direction parallel to the central axis L of the burner 300. In this way, flames in the flame stabilization grooves 214 can stabilize flames in the middle ring fire holes 212 during an operation of the burner 300, which can therefore enhance a flame stabilization effect and improve combustion performance, reducing a smoke concentration during combustion of the burner 300.

[0204] Specifically, in the embodiments illustrated in the figures, the burner 300 may be an upside-entrainment burner. When the upside-entrainment burner is applied in the cooker, a primary air inlet of the burner 300 may be located above the panel of the cooker. The base 202 may serve as a bottom cup. In an embodiment, the burner 300 may be a downside-entrainment burner. When the downside-entrainment burner is applied in the cooker, the primary air inlet of the burner 300 may be located below the panel of the cooker. The base 202 may include an ejection tube.

[0205] A primary air channel 216 may be formed between the base 202 and the outer ring portion 208. The base 202 has the bottom gas mixing cavity 218. The primary air channel 216 is in communication with the bottom gas mixing cavity 218. The bottom gas mixing cavity 218 is provided with a nozzle mounting base 220 that can be used for mounting a nozzle. An outer surface of the base 202 has a port 222 that may be connected to a gas pipeline. The nozzle can be configured to inject a gas into the bottom gas mixing cavity 218. The gas is mixed with the air in the bottom gas mixing cavity 218 to form the gas mixture that can enter the gas distribution plate 204. After the gas is ejected from the nozzle, a negative pressure is formed in the bottom gas mixing cavity 218. The negative pressure draws the primary air from the primary air inlet. The primary air enters the bottom gas mixing cavity 218 through the primary air channel 216. Therefore, the primary air can be supplemented to the gas.

[0206] The burner 300 according to the embodiments of the present application is a three-ring fire burner. The gas mixture in the outer ring gas mixing cavity 210 can be ejected from the middle ring fire hole 212 and ignited to form middle ring fire.

[0207] The gas distribution plate 204 can be configured to distribute the gas mixture. Specifically, the gas distribution plate 204 may include an intermediate portion 224, a connection portion 226, and an outer ring portion 208. The connection portion 226 is configured to connect the intermediate portion 224 and the outer ring portion 208. The intermediate portion 224 has an inner ring gas mixing cavity 228 and an inner ring fire hole 230. The inner ring gas mixing cavity 228 is in communication with the bottom gas mixing cavity 218 and the inner ring fire hole 230 through an ejection channel 232 at a bottom of the gas distribution plate 204. The gas mixture enters the inner ring gas mixing cavity 228 from the bottom gas mixing cavity 218 through the ejection channel 232. A part of the gas mixture is ejected through the inner ring fire hole 230 and ignited to form inner ring fire. The connection portion 226 has a connection channel in communication with the inner ring gas mixing cavity 228 and the outer ring gas mixing cavity 210. Another part of the gas mixture may enter the outer ring gas mixing cavity 210 from the inner ring gas mixing cavity 228 through the connection channel.

[0208] The outer ring fire cover 206 is arranged at the outer ring portion 208. The gas mixture in the outer ring gas mixing cavity 210 can be ejected from the outer ring fire hole 234 of the outer ring fire cover 206 and ignited to form outer ring fire.

[0209] The plurality of flame stabilization grooves 214 are arranged in a one-to-one correspondence with the plurality of middle ring fire holes 212 in the direction parallel to the central axis L of the burner 300. In FIG. 1, the direction parallel to the central axis L of the burner 300 is an up-down direction. The flame stabilization groove 214 is located below the middle ring fire hole 212 in the up-down direction. Each of the flame stabilization groove 214 and the middle ring fire hole 212 is in communication with the outer ring gas mixing cavity 210.

[0210] The gas mixture in the outer ring gas mixing cavity 210 can be ejected from the flame stabilization groove 214 and ignited to form a stable flame. The stable flame can stabilize an origin of the middle ring fire to avoid flame detachment and flame extinction occurred during the combustion at the middle ring fire hole 212 to a certain extent. Therefore, a flame stabilization effect of the middle ring fire hole 212 is enhanced, combustion performance is improved, and yellow flames are reduced, meeting related requirements. Further, the cost reduction and efficiency improvement are realized, which improves economic benefits.

[0211] Optionally, in an embodiment, as illustrated in FIG. 21 and FIG. 23, the outer ring portion 208 includes a first side plate 236, a bottom plate 238, and a second side plate 240. The bottom plate 238 is configured to connect the first side plate 236 and the second side plate 240. A first chamber 242 is defined by the first side plate 236, the second side plate 240, and the bottom plate 238. The outer ring fire cover 206 has a second chamber 244. The outer ring gas mixing cavity 210 is defined by the first chamber 242 and the second chamber 244. The first side plate 236 is closer to the intermediate portion 224 than the second side plate 240. The first side plate 236 has a plurality of flame stabilization grooves 214. The outer ring fire cover 206 is arranged at the outer ring portion 208 and arranged to cover over a top opening of a groove.

[0212] In the embodiments of the present application, the plurality of flame stabilization grooves 214 are arranged at intervals in the circumferential direction of the burner 300. Therefore, positions of the flame stabilization grooves 214 can be set or adjusted based on positions of the middle ring fire holes 212, to enable the flame stabilization grooves 214 to be arranged in a one-to-one correspondence with the middle ring fire holes 212 in the direction parallel to the central axis L of the burner 300. Consequently, the middle ring fire can be more effectively stabilized to enhance the flame stabilization effect. Further, when machining the flame stabilization groove 214, it is only necessary to directly machine a groove (e.g., by lathe turning) at a corresponding part of the first side plate 236, which achieves a high manufacturing efficiency of the burner 300.

[0213] In some embodiments, the outer ring fire cover 206 includes a top surface 246 and an inclined portion 248. The inclined portion 248 is connected to an edge of the top surface 246 close to a central axis L of the burner 300 and inclined from the top surface 246 towards the base 202. The middle ring fire hole 212 penetrates the inclined portion 248.

[0214] In this way, combustion at the middle ring fire hole 212 can be made more stable.

[0215] Specifically, the cooker may include a pot support that may be placed at a panel. When the burner 300 is applied in the cooker, the pot support is arranged around the burner 300. The pot support is capable of enabling the pot to be stably placed above the burner 300.

[0216] As illustrated in FIG. 23, the top surface 246 is a horizontal plane, and the inclined portion 248 is inclined downwards from the top surface 246. The inclined portion 248 faces towards the central axis L of the burner 300. The middle ring fire hole 212 penetrates the inclined portion 248, in such a manner that a certain distance is maintained between an air outlet of the middle ring fire hole 212 and the pot above the middle ring fire hole 212, which avoids an insufficient secondary air supplement to the middle ring fire hole 212 due to a short distance between the pot and the middle ring fire hole 212 to a certain extent. Therefore, the combustion at the middle ring fire hole 212 can be more stable to improve the energy efficiency of the burner 300.

[0217] In some embodiments, as illustrated in FIG. 23, the inclined portion 248 is inclined by an angle T ranging from 10° to 30°.

[0218] In this way, a heating efficiency of the middle ring fire can be guaranteed to a certain extent.

[0219] Specifically, the inclined portion 248 is inclined by the angle T ranging from 10° to 30°, i.e., 10°<T<30°. In this way, a problem of a low heating efficiency of the middle ring fire due to the air outlet of the middle ring fire hole 212 being too far away from the pot above the middle ring fire hole 212 can be avoided to a certain extent while making the combustion at the middle ring fire hole 212 more stable.

[0220] In some examples, T=10°, 12°, 15°, 20°, 25°, 28°, 30°, or other values ranging from 10° to 30°.

[0221] In some embodiments, as illustrated in FIG. 23, the middle ring fire hole 212 is inclined from the outer ring portion 208 towards the central axis L of the burner 300. An angle Q between an axis of the middle ring fire hole 212 and the central axis L of the burner 300 ranges from 40° to 60°.

[0222] In this way, a heating area of the middle ring fire can be enlarged.

[0223] Specifically, the middle ring fire hole 212 is inclined from the outer ring portion 208 towards the central axis L of the burner 300, in such a manner that the gas mixture is ejected by the air outlet of the middle ring fire hole 212 towards the central axis L of the burner 300. The formed middle ring fire obliquely heats a bottom of the pot. Therefore, a larger heating area is defined by the middle ring fire, which is beneficial to uniform heating of the pot.

[0224] Further, when the burner 300 simultaneously forms the three-ring fire, a heating area defined by the three-ring fire is larger, which allows the entire pot to be heated more uniformly, and achieves satisfactory performance of the burner 300.

[0225] An angle Q between an axis of the middle ring fire hole 212 and the central axis L of the burner 300 ranges from 40° to 60°, i.e., 40°<Q<60°. In this way, the problem of the low heating efficiency due to the middle ring fire hole 212 being too far away from the pot can be avoided to a certain extent while ensuring the heating area of the middle ring fire.

[0226] In some examples, Q=40°, 42°, 45°, 48°, 50°, 55°, 58°, 60°, or other values ranging from 40° to 60°.

[0227] In some embodiments, in the direction parallel to the central axis L of the burner 300, a plurality of middle ring fire holes 212 are corresponding to the plurality of flame stabilization grooves 214, respectively, and the plurality of middle ring fire holes 212 are arranged at intervals in a direction away from the central axis L of the burner 300.

[0228] In this way, the heating area of the middle ring fire can be enlarged.

[0229] Specifically, as illustrated in FIG. 17, in the up-down direction, two middle ring fire holes 212 are corresponding to each flame stabilization groove 214, and are spaced apart from each other in the direction away from the central axis L of the burner 300. In the circumferential direction P of the burner 300, the burner 300 may form a two-ring middle ring fire hole 212. Two-ring middle ring fire may be formed during the combustion, enlarging the heating area of the middle ring fire.

[0230] Optionally, in other embodiments, the present application is not limited to the case that the two middle ring fire holes 212 are corresponding to each flame stabilization groove 214. Instead, one or more than two middle ring fire holes 212 may be corresponding to each flame stabilization groove 214.

[0231] In FIG. 20, the middle ring fire hole 212 penetrates the inclined portion 248. In the direction parallel to the central axis L of the burner 300, two middle ring fire holes 212 are corresponding to each flame stabilization groove 214, and are spaced apart from each other in the direction away from the central axis L of the burner 300. One of the two middle ring fire holes 212 is located below the other one of the two middle ring fire holes 212. When the burner 300 is in operation, the stable flame defined by the combustion at the flame stabilization groove 214 can stabilize flame of the lowest middle ring fire hole 212, and flame of the lower middle ring fire hole 212 can stabilize flame of the upper middle ring fire hole 212. In this way, all the middle ring fire holes 212 corresponding to each flame stabilization groove 214 can form stable middle ring fire in the direction parallel to the central axis L of the burner 300, which can ensure stability of the middle ring fire defined by each middle ring fire hole 212 while enlarging the heating area of the middle ring fire, further improving the flame stabilization effect.

[0232] In some embodiments, as illustrated in FIG. 20 to FIG. 22, the gas distribution plate 204 includes an intermediate portion 224 and a plurality of connection portions 226. The plurality of connection portions 226 are arranged at intervals in a circumferential direction P of the burner 300 and configured to connect the outer ring portion 208 and the intermediate portion 224. A secondary air channel 250 is defined by two adjacent connection portions 226 of the plurality of connection portions 226, the outer ring portion 208, and the intermediate portion 224. The plurality of flame stabilization grooves 214 are arranged at a surface of the outer ring portion 208 towards the secondary air channel 250.

[0233] Therefore, the secondary air can be supplemented to the middle ring fire hole 212 and the flame stabilization groove 214.

[0234] Specifically, the secondary air channel 250 may draw the secondary air from a space (which also serves as the secondary air channel) between the outer ring portion 208 and the base 202. The flame stabilization groove 214 is located at the surface of the outer ring portion 208 towards the secondary air channel 250, in such a manner that the secondary air can be supplemented to the vicinity of the flame stabilization groove 214.

[0235] The plurality of flame stabilization grooves 214 are arranged in a one-to-one correspondence with the plurality of middle ring fire holes 212 in the direction parallel to the central axis L of the burner 300. Therefore, the secondary air may also flow towards the middle ring fire hole 212 in the direction parallel to the central axis L of the burner 300 to be supplemented to the middle ring fire hole 212. In this way, sufficient secondary air can be supplemented to the middle ring fire hole 212 and the flame stabilization groove 214 to achieve more complete combustion at the middle ring fire hole 212 and the flame stabilization groove 214.

[0236] In some embodiments, as illustrated in FIG. 21 and FIG. 23, the outer ring portion 208 includes the first side plate 236, the bottom plate 238, and the second side plate 240. The bottom plate 238 is configured to connect the first side plate 236 and the second side plate 240. The first chamber 242 is defined by the first side plate 236, the second side plate 240, and the bottom plate 238. The outer ring fire cover 206 has the second chamber 244. The outer ring gas mixing cavity 210 is defined by the first chamber 242 and the second chamber 244. The first side plate 236 is closer to the intermediate portion 224 than the second side plate 240. The first side plate 236 is provided with a first step portion 252 at a surface of the first side plate 236 towards the first cavity 242. The outer ring fire cover 206 is provided with a second step portion 254 at a surface of the outer ring fire cover 206 away from the second cavity 244. The first step portion 252 is engaged with and connected to the second step portion 254.

[0237] Therefore, the outer ring fire cover 206 and the outer ring portion 208 can be more tightly engaged with each other to prevent a leakage of the gas mixture.

[0238] Specifically, the first step portion 252 is engaged with and connected to the second step portion 254. On the one hand, a junction formed through a connection between the outer ring fire cover 206 and the first side plate 236 has a large area. In addition, the junction has a substantially Z-shaped cross section, a path through which the gas mixture flows is therefore lengthened, which enables the gas mixture to be less likely to be leaked from the junction. On the other hand, during the combustion of the burner 300, the first step portion 252 and the second step portion 254 slightly expand when heated, in such a manner that the first step portion 252 and the second step portion 254 are more tightly engaged with each other, preventing the leakage of the gas mixture.

[0239] Optionally, the surface of the outer ring fire cover 206 away from the second chamber 244 is further provided with a third step portion 256. The third step portion 256 and the second step portion 254 are spaced apart from each other in a radial direction of the burner 300. The radial direction of the burner 300 is perpendicular to the central axis L of the burner 300. The third step portion 256 being engaged with and connected to the second side plate 240 can also enable the outer ring fire cover 206 and the second side plate 240 to be engaged with each other more tightly to prevent the leakage of the gas mixture.

[0240] In some embodiments, the intermediate portion 224 has an inner ring gas mixing cavity 228 and an inner ring fire hole 230. The inner ring fire hole 230 is in communication with the inner ring gas mixing cavity 228.

[0241] Therefore, the burner 300 can be made using less material, which reduces costs of the burner 300.

[0242] In the related art, the intermediate portion of the gas distribution plate has the cavity. The top of the cavity has the opening. The burner further includes the inner ring fire cover (or the central fire cover) having the inner ring fire hole. The inner ring fire cover is arranged at the intermediate portion and covers the opening of the cavity. In this way, the inner ring gas mixing cavity is defined by the inner ring fire cover and the intermediate portion. To mount the inner ring fire cover, the cavity of the intermediate portion has a large wall thickness for an arrangement of a first mounting portion, and the inner ring fire cover is provided with a second mounting portion. The first mounting portion is engaged with and connected to the second mounting portion to assemble the inner ring fire cover to the intermediate portion. However, such an assembly method makes more materials used to manufacture the burner, resulting in higher costs of the burner.

[0243] In some embodiments, the outer ring fire cover 206 has an outer ring fire hole 234 at a circumferential side surface of the outer ring fire cover 206 away from the central axis L of the burner 300. The outer ring fire hole 234 is in communication with the outer ring gas mixing cavity 210. Flow guide spaces 258 are formed at a junction between the circumferential side surface of the outer ring fire cover 206 away from the central axis L of the burner 300 and a top surface 246 of the outer ring fire cover 206. The flow guide space 258 is configured to guide secondary air above the outer ring fire cover 206 to the circumferential side surface of the outer ring fire cover 206 away from the central axis L of the burner 300.

[0244] Therefore, the smoke generated during the combustion of the burner 300 is reduced to a certain extent, and the energy efficiency of the burner 300 is enhanced.

[0245] Specifically, the burner 300 further includes an ignition needle 260 and a thermocouple 262, which are mounted at the base 202. The thermocouple 262 is arranged at an outer side of the outer ring fire hole 234. The gas mixture can enter the outer ring gas mixing cavity 210 from the inner ring gas mixing cavity 228 through the connection channel. A part of the gas mixture is ejected from the outer ring fire hole 234, is ignited by the ignition needle 260, and burns to form the outer ring fire.

[0246] The outer ring fire hole 234 is formed at the circumferential side surface of the outer ring fire cover 206 away from the central axis L of the burner 300. The flow guide space 258 is located at the junction between the circumferential side surface of the outer ring fire cover 206 away from the central axis L of the burner 300 and the top surface 246 of the outer ring fire cover 206. When the outer ring fire hole 234 consumes air in the vicinity of the outer ring fire hole 234 during the combustion, the flow guide space 258 can direct the secondary air above the outer ring fire cover 106 to the circumferential side surface of the outer ring fire cover 206 that away from the central axis L of the burner 300, to supplement the secondary air to the combustion at the outer ring fire hole 234 in a timely manner. Therefore, more complete combustion of the outer ring fire is realized, which increases the burning rate of the gas mixture, reduces or even eliminates the yellow flames, decreases the smoke generated during the combustion of the burner 300, and enhances the energy efficiency of the burner 300. Further, the cost reduction and the efficiency improvement can be realized. The burner 300 has the low smoke concentration and the high energy efficiency during the combustion, which can meet the related requirements.

[0247] Optionally, in FIG. 17, the flow guide space 258 is in the form of the groove that is configured to obliquely (not including vertically) connect the circumferential side surface of the outer ring fire cover 206 that away from the central axis L of the burner 300 and the top surface 246 of the outer ring fire cover 206. Optionally, the groove has the width that gradually increases in the direction away from the bottom of the groove. Optionally, in other embodiments, the flow guide space 258 may be in the form of the through hole.

[0248] Optionally, the plurality of flow guide spaces 258 are formed at the junction between the circumferential side surface of the outer ring fire cover 206 that away from the central axis L of the burner 300 and the top surface 246 of the outer ring fire cover 206, and arranged at intervals in the circumferential direction P of the burner 300. The plurality of outer ring fire holes 234 are formed at the circumferential side surface of the outer ring fire cover 206 that away from the central axis L of the burner 300 in the circumferential direction P of the burner 200. In this way, sufficient secondary air is supplemented to each outer ring fire hole 234.

[0249] Optionally, a plurality of outer ring fire holes 234 are arranged into a first fire hole row in a circumferential direction of the burner 300, and a plurality of outer ring fire holes 234 are arranged into a second fire hole row in the circumferential direction of the burner 300. The first fire hole row and the second fire hole row are spaced apart from each other in the axial direction of the burner 300. The outer ring fire holes 234 of the first fire hole row are offset from the outer ring fire holes 234 of the second fire hole row in the axial direction of the burner 300.

[0250] Optionally, the first fire hole row is closer to a top of the outer ring fire cover 206 than the second fire hole row. The plurality of outer ring fire holes 234 of the first fire hole row are located between two adjacent flow guide spaces in the circumferential direction of the burner 300. Each of the plurality of outer ring fire holes 234 of the second fire hole row is corresponding to the flow guide space in the axial direction of the burner 300.

[0251] A cooker according to the embodiments of the present application includes the burner 300 according to any one of the above embodiments.

[0252] With the above cooker, the surface of the outer ring portion 208 towards the central axis L of the burner 300 has the plurality of flame stabilization grooves 214. The plurality of flame stabilization grooves 214 are arranged in a one-to-one correspondence with the plurality of middle ring fire holes 212 in the direction parallel to the central axis L of the burner 300. In this way, flames in the flame stabilization grooves 214 can stabilize flames in the middle ring fire holes 212 during an operation of the burner 300, which can therefore enhance a flame stabilization effect and improve combustion performance, reducing a smoke concentration during combustion of the burner 300.

[0253] Specifically, the cooker may include, but is not limited to, a gas cooker, an integrated cooker, an oven, and the like. The cooker may include one or more burners 300. The cooker may include a panel and a pot support. The panel has an opening. The pot support is disposed at the panel and arranged around the opening. The burner 300 passes through the opening to extend above the panel. The pot support is arranged around the burner 300 and used for stable placement of the pot above the burner 300.

[0254] In the related art, the burner includes an inner ring fire cover and a gas distribution plate. During an assembly, the inner ring fire cover is arranged at the gas distribution plate to form the inner ring gas mixing cavity. However, such an assembly method makes material costs of the burner high.

[0255] To solve the above technical problems, according to some other embodiments of the present application, a burner is provided by the present application. The burner includes: a base having a bottom gas mixing cavity; a gas distribution plate arranged at the base, a surface of the base facing towards the gas distribution plate is provided with a plurality of ribs arranged at intervals in a circumferential direction of the burner, an air channel being formed between two adjacent ribs of the plurality of ribs and having primary air channels and secondary air channels that are alternately arranged in the circumferential direction of the burner, the primary air channels being in communication with the bottom gas mixing cavity, the gas distribution plate having a plurality of through holes, and the plurality of through holes being in communication with the secondary air channels, respectively; a central fire cover arranged at the gas distribution plate, a central gas mixing cavity being defined by the central fire cover and the gas distribution plate, the central fire cover having an inner ring fire hole in communication with the central gas mixing cavity, and the inner ring fire hole being in communication with the secondary air channels through the plurality of through holes, respectively; and an outer ring fire cover arranged at the gas distribution plate, an outer ring gas mixing cavity being defined by the outer ring fire cover and the gas distribution plate, and the outer ring fire cover having an outer ring fire hole in communication with the outer ring gas mixing cavity.

[0256] In some embodiments, each of the primary air channels has a bottom surface that is inclined from a top of the bottom gas mixing cavity to a bottom of the bottom gas mixing cavity.

[0257] In some embodiments, the bottom surface of each of the plurality of primary air channels is provided with a baffle bar.

[0258] In some embodiments, two of the plurality of ribs that form a same primary air channel are parallel to each other.

[0259] In some embodiments, the gas distribution plate is provided with a mounting portion at a surface of the gas distribution plate facing the base. The burner includes a connection rib configured to connect two ends of the two of the plurality of ribs that form the one secondary air channel. The two ends of the two of the plurality of ribs that form the one secondary air channel are close to an axis of the burner. The connection rib is provided with a guide portion at a surface of the connection rib towards the bottom gas mixing cavity. The mounting portion is located at the bottom gas mixing cavity and supported by the guide portion.

[0260] In some embodiments, the gas distribution plate includes a central portion, a plurality of connection portions, and an outer ring portion. The central fire cover is arranged at the central portion. The outer ring fire cover is arranged at the outer ring portion. The plurality of connection portions are configured to connect the central portion to the outer ring portion in the circumferential direction of the burner. A secondary air cavity is defined by two adjacent connection portions of the plurality of adjacent connection portions, the central portion, and the outer ring portion. The inner ring fire hole is in communication with two adjacent through holes of the plurality of through holes through the secondary air cavity.

[0261] In some embodiments, the inner ring fire hole is corresponding to the secondary air cavity in a direction parallel to the axis of the burner.

[0262] In some embodiments, the outer ring fire cover includes an inclined surface towards the axis of the burner. The inclined surface has a middle ring fire hole in communication with the outer ring gas mixing cavity. The middle ring fire hole is corresponding to the secondary air cavity in the direction parallel to the axis of the burner.

[0263] In some embodiments, the inclined surface is provided with a plurality of protrusions arranged at intervals in the circumferential direction of the burner. A first groove is formed between two adjacent protrusions of the plurality of protrusions. The first groove has the middle ring fire hole at a bottom surface of the first groove. Each of the plurality of protrusions has the middle ring fire hole.

[0264] In some embodiments, the outer ring fire hole is arranged at a circumferential side surface of the outer ring fire cover faces away from the central fire cover. Flow guide spaces are formed at a junction between the circumferential side surface of the outer ring fire cover faces away from the central fire cover and a top surface of the outer ring fire cover. The flow guide space is configured to guide secondary air above the outer ring fire cover to the circumferential side surface of the outer ring fire cover faces away from the central fire cover.

[0265] In some embodiments, the flow guide space has first flow guide spaces and second flow guide spaces, the first flow guide spaces being divided into a first flow guide group in the circumferential direction of the burner, one second guide space of the second flow guide spaces being arranged between two adjacent first flow guide groups of first flow guide groups, and each of the second flow guide spaces having a greater width than each of the first flow guide spaces.

[0266] A cooker according to an embodiment of the present application includes the burner according to any of the above embodiments.

[0267] Specifically, as illustrated in FIG. 24 to FIG. 29, a burner 100 according to an embodiment of the present application includes a base 12, a gas distribution plate 14, a central fire cover 17, and an outer ring fire cover 16. The base 12 has a bottom gas mixing cavity 24. The gas distribution plate 14 is arranged at the base 12. A surface of the base 12 towards the gas distribution plate 14 is provided with a plurality of ribs 23 arranged at intervals in a circumferential direction P of the burner 100. An air channel is formed between two adjacent ribs 23 of the plurality of ribs 23 and has primary air channels 87 and secondary air channels 88 that are alternately arranged in the circumferential direction P of the burner 100. The primary air channels 87 are in communication with the bottom gas mixing cavity 24. The gas distribution plate 14 has a plurality of through holes 29. The plurality of through holes 29 are in communication with the secondary air channels 88, respectively.

[0268] A central fire cover 17 is arranged at the gas distribution plate 14. A central gas mixing cavity 31 is defined by the central fire cover 17 and the gas distribution plate 14. The central fire cover 17 has an inner ring fire hole 42 in communication with the central gas mixing cavity 31. The inner ring fire hole 42 is in communication with the secondary air channels 88 through the plurality of through holes 29, respectively. The outer ring fire cover 16 is arranged at the gas distribution plate 14. An outer ring gas mixing cavity 18 is defined by the outer ring fire cover 16 and the gas distribution plate 14. The outer ring fire cover 16 has an outer ring fire hole 20 in communication with the outer ring gas mixing cavity 18.

[0269] With the above burner 100, a plurality of secondary air channels 88 are arranged at the base 12. The secondary air channel 88 is in communication with the inner ring fire hole 42, which can allow the secondary air to be continuously supplemented to improve performance of the burner 100. The plurality of primary air channels 87 and the plurality of secondary air channels 88 are arranged at intervals in the circumferential direction of the burner 100, which can reduce resistance in a hot state to increase a supplemental flow rate of air, supplying sufficient primary air and secondary air to the burner 100.

[0270] Specifically, the burner 100 according to the embodiments of the present application may serve as an upside-entrainment burner. In the upside-entrainment burner, an air inlet of the primary air channel 87 may be located above the panel of the cooker. A bottom of the bottom gas mixing cavity 24 may be provided with a nozzle mounting base 26. A nozzle is mounted at the nozzle mounting base 26. An outer surface of the base 12 has a port 28 configured to be connected to a gas pipeline. The gas flows through the port 28 to the nozzle and is ejected into the bottom gas mixing cavity 24 through the nozzle. A material of the burner 100 includes, but is not limited to, copper.

[0271] A surface of the base 12 towards the gas distribution plate 14 is provided with a plurality of ribs 23 arranged at intervals in a circumferential direction P of the burner 100. An air channel is formed between two adjacent ribs 23 of the plurality of ribs 23 and has primary air channels 87 and secondary air channels 88 that are alternately arranged in the circumferential direction P of the burner 100. The primary air channel 87 is in communication with the bottom gas mixing cavity 24, in such a manner that the primary air can be supplemented to the bottom gas mixing cavity 24. The rib 23 and the base 12 may be connected to each other and integrally formed. Also, the rib 23 may be connected to the base 12 by means of welding, bolting, or the like. The present application is not limited to any of these examples.

[0272] All the ribs 23 may be of a same height or different heights, or some of all the ribs 23 may be of a same height and some of all the ribs 23 may be of different heights. In FIG. 30, all the ribs 23 are of a same height.

[0273] The gas entering the bottom gas mixing cavity 24 is mixed with the air in the bottom gas mixing cavity 24 to form the gas mixture. The gas mixture enters the gas distribution plate 14 through an ejection tube 43 at a bottom of the gas distribution plate 14. After the gas mixture enters the ejection tube 43, a negative pressure is formed in the bottom gas mixing cavity 24. The negative pressure draws the primary air from the primary air channel 87. Then, the primary air is mixed with the gas ejected from the nozzle to form the gas mixture.

[0274] The gas distribution plate 14 is arranged at the base 12 and can be configured to distribute the gas mixture. Optionally, the gas distribution plate 14 includes a central portion 45, a plurality of connection portions 47, and an outer ring portion 30. The plurality of connection portions 47 are configured to connect the central portion 45 and the outer ring portion 30 in the circumferential direction P of the burner 100. The central portion 45 is connected to the ejection tube 43. Optionally, the central portion 45 has a first cavity 51. The connection portion 47 has a connection chamber 53.

[0275] The gas distribution plate 14 has a plurality of through holes 29. The plurality of through holes 29 are in communication with the secondary air channels 88, respectively. The plurality of through holes 29 may be in communication with the gaps between every two adjacent connection portions 47 of the plurality of connection portions 47, respectively, in such a manner that the secondary air can enter the gaps through the secondary air channels 88 and flow to the inner ring fire hole 42.

[0276] The outer ring portion 30 is arranged around the central portion 45. Optionally, the outer ring portion 30 has a second cavity 55. The connection chamber 53 is in communication with the first cavity 51 and the second cavity 55.

[0277] The central fire cover 17 is arranged at the gas distribution plate 14. Specifically, the central fire cover 17 is arranged at the central portion 45. Optionally, the central fire cover 17 has a third cavity 57. The central gas mixing cavity 31 is defined by the first cavity 51 and the third cavity 57. The inner ring fire hole 42 is in communication with the central gas mixing cavity 31.

[0278] The outer ring fire cover 16 is arranged at the gas distribution plate 14. Specifically, the outer ring fire cover 16 is arranged at the outer ring portion 30. Optionally, the outer ring fire cover 16 has a fourth cavity 59. The outer ring gas mixing cavity 18 is defined by the fourth cavity 59 and the second cavity 55. The outer ring fire hole 20 is in communication with the outer ring gas mixing cavity 18. The connection chamber 53 is in communication with the central gas mixing cavity 31 and the outer ring gas mixing cavity 34.

[0279] The gas mixture enters the central gas mixing cavity 31 through the ejection tube 43. A part of the gas mixture is ejected through the inner ring fire hole 42 and burns to form the inner ring fire. Another part of the gas mixture enters the outer ring gas mixing cavity 18 through the connection chamber 53, is ejected from the outer ring fire hole 20, and burns to form the outer ring fire.

[0280] When combustion takes place at the inner ring fire hole 42, the air in the vicinity of the inner ring fire hole 42 is consumed, which forms a negative pressure. The negative pressure draws the secondary air through a through hole 29 and the secondary air channel 88. Therefore, the secondary air is supplemented to the inner ring fire hole 42 in a timely manner, which ensures a sufficient supplement of the secondary air, reduces the smoke concentration during the operation of the burner 100, and enhances the energy efficiency of the burner 100, meeting related requirements.

[0281] In an embodiment, the primary air channels 87 and the secondary air channels 88 are the same in quantity and alternately arranged in the circumferential direction of the burner 100, maximizing utilization of air around the burner 100. Optionally, in FIG. 29, the burner 100 includes eight air channels, four of which are primary air channels 87 and the remaining four are secondary air channels 88. An arrangement of the plurality of air channels defined by the ribs 23 can reduce a resistance in the air channels in the hot state to increase the supplemental flow rate of air, which is beneficial for a quick supplement of the primary air and the secondary air to the burner 100, improves the performance of the burner 100, and reduces the yellow flames.

[0282] Optionally, an end of the rib 23 away from an axis L of the burner 100 is arranged close to an edge of the base 12. In this way, an air inlet of the air channel can be made closer to the edge of the base 12, to enable the primary air to enter the bottom gas mixing cavity 24 faster and the secondary air to flow through the through hole 29 to the inner ring fire hole 42 faster.

[0283] As illustrated in FIG. 29, in some embodiments, each of the primary air channels 87 has a bottom surface that is inclined from a top of the bottom gas mixing cavity 24 to a bottom of the bottom gas mixing cavity 24.

[0284] Therefore, the primary air can be sufficiently mixed with the gas in the bottom gas mixing cavity 24.

[0285] Specifically, in an embodiment, in a direction from the air inlet of the primary air channel 87 to the bottom gas mixing cavity 24, a depth of the primary air channel 87 gradually increases, allowing the primary air to be evenly dispersed. The bottom surface of each of the primary air channels 87 being inclined from the top of the bottom gas mixing cavity 24 to the bottom of the bottom gas mixing cavity 24 can also enable the primary air to be quickly mixed with the gas ejected from the nozzle at the bottom. In this way, the primary air can be more sufficiently mixed with the gas in the bottom gas mixing cavity 24.

[0286] As illustrated in FIG. 29, in some embodiments, the bottom surface of each of the plurality of primary air channels 87 is provided with a baffle bar 63. The baffle bar 63 is connected to the two ribs 23 forming the primary air channel.

[0287] Therefore, a liquid outside the burner 100 can be prevented from entering the bottom gas mixing cavity 24.

[0288] Specifically, in an embodiment, the bottom surface of some of the plurality of primary air channels 87 is provided with a fixation portion 61. The fixation portion 61 is configured to fix the burner 100 to the panel of the cooker. For the primary air channel 87 provided with no fixation portion 61, the baffle bar 63 is disposed at the air inlet of the primary air channel 87. For the primary air channel 87 provided with the fixation portion 61, the baffle bar 63 is disposed at a side of the fixation portion 61 close to the axis L of the burner 100.

[0289] A height of the baffle bar 63 can be specifically determined as desired. The present application is not specifically limited in this regard.

[0290] As illustrated in FIG. 6, in some embodiments, two of the plurality of ribs 23 that form a same primary air channel 87 are parallel to each other.

[0291] In this way, the primary air channel 87 has a uniform width, which realizes smooth circulation of the primary air.

[0292] Specifically, a same primary air channel 87 having a uniform width is defined by two ribs 23 that are parallel to each other. An extension direction of the primary air channel 87 intersects the axis L of the burner 100. Therefore, the smooth circulation of the primary air can be realized, which further increases a speed of supplementing the primary air.

[0293] As illustrated in FIG. 28, FIG. 29, and FIG. 31, in some embodiments, the gas distribution plate 14 is provided with a mounting portion 65 at a surface of the gas distribution plate 14 facing the base 12. The burner 10 includes a connection rib 67 configured to connect two ends of the two of the plurality of ribs 23 that form a same secondary air channel 88. The two ends of the two of the plurality of ribs 23 that form the same secondary air channel 88 are close to an axis L of the burner 100. The connection rib 67 is provided with a guide portion 68 at a surface of the connection rib 67 towards the bottom gas mixing cavity 24. The mounting portion 65 is located at the bottom gas mixing cavity 24 and supported by the guide portion 68.

[0294] Therefore, the gas distribution plate 14 can be mounted relatively firmly at the base 12.

[0295] Specifically, in FIG. 28, a surface of the gas distribution plate 14 towards the base 12 is a bottom surface of the gas distribution plate 14. In an embodiment, the connection rib 67 may have a same height as the rib 23. The guide portion 68 is formed at the surface of the connection rib 67 towards the bottom gas mixing cavity 24. During mounting, the mounting portion 65 is correspondingly connected to the guide portion 68 to facilitate positioning and mounting of the gas distribution plate 14.

[0296] An arrangement of the connection rib 67 can also allow substantially all of the secondary air to flow towards the through hole 29, increasing the secondary air supplement amount for the inner ring fire hole 42.

[0297] As illustrated in FIG. 29 and FIG. 30, in some embodiments, the gas distribution plate 14 includes a central portion 45, a plurality of connection portions 47, and an outer ring portion 30. The central fire cover 17 is arranged at the central portion 45. The outer ring fire cover 16 is arranged at the outer ring portion 30. The plurality of connection portions 47 are configured to connect the central portion 45 to the outer ring portion 30 in the circumferential direction P of the burner 100. A secondary air cavity 69 is defined by two adjacent connection portions 47 of the plurality of adjacent connection portions 47, the central portion 45, and the outer ring portion 30. The inner ring fire hole 42 is in communication with two adjacent through holes 29 through the secondary air cavity 69.

[0298] Therefore, the secondary air can be continuously supplemented to the inner ring fire hole 42.

[0299] Specifically, air outside the burner 100 enters the burner 100 from the secondary air channel 88, flows into the secondary air cavity 69 from the through hole 29, and finally participates in the combustion at the inner ring fire hole 42. In this way, the secondary air can be continuously supplemented to the inner ring fire hole 42 to improve the performance of the burner 100.

[0300] Further, the inner ring fire hole 42 is in communication with the two adjacent through holes 29 through the one secondary air cavity 69. The secondary air cavity 69 can be supplied with the secondary air from the two through holes 29, realizing a large secondary air supplement amount for the inner ring fire hole 42.

[0301] As illustrated in FIG. 24, in some embodiments, the inner ring fire hole 42 is corresponding to the secondary air cavity 69 in a direction parallel to the axis L of the burner 100.

[0302] Therefore, the secondary air can be more sufficiently supplemented to the inner ring fire hole 42.

[0303] Specifically, in FIG. 24, the direction parallel to the axis L of the burner 100 is the up-down direction. Since the inner ring fire hole 42 is corresponding to the secondary air cavity 69 in the up-down direction, complete combustion can be realized at the inner ring fire hole 42.

[0304] Since the connection portion 47 is configured to connect the central portion 45 and the outer ring portion 30, the secondary air is less likely to reach a part of the central fire cover 17 corresponding to the connection portion 47 in the up-down direction. Therefore, no inner ring fire hole 42 is formed at the part of the central fire cover 17 corresponding to the connection portion 47. In the up-down direction, the inner ring fire hole 42 is corresponding to the secondary air cavity 69. On the one hand, the secondary air cavity 69 can provide sufficient secondary air for the inner ring fire hole 42. On the other hand, the secondary air cavity 69 has a large width in the circumferential direction P of the burner 100, which allows a relatively large quantity of inner ring fire holes 42 to be formed at the part of the central fire cover 17 corresponding to the secondary air cavity 69. Further, too small a heating area and uneven heating due to a relatively small quantity of inner ring fire holes 42 can be avoided to a certain extent.

[0305] Optionally, in FIG. 24 and FIG. 25, four secondary air cavities 69 are formed. Each of the four secondary air cavities 69 corresponds to a set of inner ring fire holes 42. Each set of inner ring fire holes 42 includes five inner ring fire holes 42.

[0306] In some embodiments, the outer ring fire cover 16 includes an inclined portion 70 towards the axis L of the burner 100. The inclined portion 70 has a middle ring fire hole 72 in communication with the outer ring gas mixing cavity 18. The middle ring fire hole 72 is corresponding to the secondary air cavity 69 in the direction parallel to the axis L of the burner 100.

[0307] Therefore, the secondary air can be more sufficiently supplemented to the middle ring fire hole 72.

[0308] Specifically, in FIG. 24, the direction parallel to the axis L of the burner 100 is the up-down direction. Since the middle ring fire hole 72 is corresponding to the secondary air cavity 69 in the up-down direction, complete combustion can be realized at the middle ring fire hole 72. The burner 100 may be the three-ring fire burner. It should be understood that, in other embodiments, the burner 100 may also have no middle ring fire hole 72. The burner 100 may be a two-ring fire burner.

[0309] Similarly, since the connection portion 47 is configured to connect the central portion 45 and the outer ring portion 30, the secondary air is less likely to reach a part of the inclined portion 70 of the outer ring fire cover 16 corresponding to the connection portion 47 in the up-down direction. Therefore, no middle ring fire hole 72 is formed at the part of the inclined portion 70 of the outer ring fire cover 16 corresponding to the connection portion 47. In the up-down direction, the middle ring fire hole 72 is corresponding to the secondary air cavity 69. On the one hand, the secondary air cavity 69 can provide sufficient secondary air for the middle ring fire hole 72. On the other hand, the secondary air cavity 69 has a large width in the circumferential direction P of the burner 100, which allows a relatively large quantity of middle ring fire holes 72 to be formed at the part of the inclined portion 70 of the outer ring fire cover 16 corresponding to the secondary air cavity 69. Further, too small a heating area and uneven heating due to a relatively small quantity of middle ring fire holes 72 can be avoided to a certain extent.

[0310] In some embodiments, the inclined portion 70 is provided with a plurality of protrusions 73 arranged at intervals in the circumferential direction P of the burner 100. A first recess 74 is formed between two adjacent protrusions 73 of the plurality of protrusions 73. The first recess 74 has the middle ring fire hole 72 at a bottom surface of the first recess 74. Each of the plurality of protrusions 73 has the middle ring fire hole 72.

[0311] Therefore, the secondary air in the secondary air cavity 69 can be directed towards the outer ring fire hole 20.

[0312] Specifically, the outer ring fire hole 20 is formed at the circumferential side surface of the outer ring fire cover 16 that away from the central fire cover 17. The first recess 74 is capable of guiding a part of the secondary air in the secondary air cavity 69 to an outer side of the outer ring fire cover 16, to enable this part of the secondary air to flow to the outer ring fire hole 20. In this way, the gas mixture at the outer ring fire hole 20 can be more fully burned, which enhances the energy efficiency of the burner 100, and reduces the smoke generated during the operation of the burner 100.

[0313] In some embodiments, the outer ring fire hole 20 is arranged at a circumferential side surface of the outer ring fire cover 16 away from the central fire cover 17. Flow guide spaces are formed at a junction between the circumferential side surface of the outer ring fire cover 16 away from the central fire cover 17 and a top surface of the outer ring fire cover 16. The flow guide space is configured to guide secondary air above the outer ring fire cover 16 to the circumferential side surface of the outer ring fire cover 16 away from the central fire cover 17.

[0314] Therefore, sufficient secondary air can be supplemented to the outer ring fire hole 20.

[0315] Specifically, the plurality of outer ring fire holes 20 are formed, in the circumferential direction P of the burner 100, at the circumferential side surface of the outer ring fire cover 16 that away from the central fire cover 17. The gas mixture is ejected from the outer ring fire hole 20.

[0316] The burner 100 further includes an ignition needle 76 and a thermocouple 78 arranged close to the outer ring fire hole 20. The gas mixture ejected from the outer ring fire hole 20 is ignited by the ignition needle 76 and burns to form the outer ring fire. The outer ring fire consumes air in the vicinity of the outer ring fire hole 20. The secondary air outside the circumferential side surface of the outer ring fire cover 16 away from the central fire cover 17 can be supplemented to the outer ring fire hole 20. The flow guide space can be further configured to guide the secondary air above the outer ring fire cover 16 to the circumferential side surface of the outer ring fire cover 16 away from the central fire cover 17. In this way, the secondary air supplement amount for the outer ring fire hole 20 can be further increased to enable the gas mixture to be fully burned. Therefore, the smoke concentration during the operation of the burner 100 can be reduced, the energy efficiency can be enhanced, and the yellow flames can be reduced.

[0317] In the embodiments illustrated in the figures, the flow guide space is in the form of the groove. Optionally, the groove has the width that gradually increases in the direction away from the bottom of the groove. It should be understood that, in other embodiments, the flow guide space may also be in a form of the through hole 29. The through hole 29 is inside the outer ring fire cover 16 and in no communication with the outer ring gas mixing cavity 18.

[0318] Optionally, the flow guide space is obliquely connected to the top surface of the outer ring fire cover 16 and the circumferential side surface of the outer ring fire cover 16, which realizes smoother circulation of the secondary air.

[0319] In some embodiments, as illustrated in FIG. 29, the flow guide space has first flow guide spaces 80 and second flow guide spaces 82, the first flow guide spaces 80 are divided into a first flow guide group 84 in the circumferential direction P of the burner 100, one second guide space 82 of the second flow guide spaces 82 is arranged between two adjacent first flow guide groups 84 of first flow guide groups 84, and each of the second flow guide spaces 82 has a greater width than each of the first flow guide spaces 80.

[0320] In this way, the energy efficiency of the burner 100 can be better enhanced.

[0321] Specifically, the cooker may include the burner 100, the panel, and the pot support. The panel has an opening. The burner 100 passes through the opening. The pot support is arranged at the panel and arranged around the burner 100. The pot support includes a plurality of support arms arranged at intervals in the circumferential direction P of the burner 100. The plurality of support arms are configured to support the pot to enable the pot to be stably placed above the burner 100.

[0322] Due to the obstruction of the plurality of support arms, flames generated during the operation of the burner 100 cannot directly heat parts of the pot that are in contact with the plurality of support arms. Therefore, regions of the circumferential side surface of the outer ring fire cover 16 that face away from the central fire cover 17 and correspond to the plurality of support arms typically have few or no outer ring fire holes 20. Since the second flow guide space 82 has a large width, a design of the outer ring fire cover 16 can be adapted to the pot support, and the second flow guide space 82 can cover a part or all of the regions of the circumferential side surface of the outer ring fire cover 16 that face away from the central fire cover 17 and correspond to the plurality of support arms. In this way, the second flow guide space 82 can also guide the secondary air in the vicinity of the plurality of support arms to the circumferential side surface of the outer ring fire cover 16 that away from the central fire cover 17, which increases the secondary air supplement amount for the outer ring fire holes 20 in the vicinity of the plurality of support arms to a certain extent, further better enhancing the energy efficiency of the burner 100.

[0323] The second flow guide spaces 82 may be in a one-to-one correspondence to the plurality of support arms. In FIG. 29, four first flow guide groups 84 are provided. One second flow guide space 82 is arranged between two adjacent first flow guide groups 84 in the circumferential direction P of the burner 100, and thus a total of four second flow guide spaces 82 are formed, which correspond to a pot support having four support arms. A quantity of first flow guide spaces 80 of each first flow guide group 84 may be the same or different.

[0324] Optionally, the width of the second flow guide space 82 is greater than the width of the support arm.

[0325] Optionally, as illustrated in FIG. 25, in a radial direction of the burner 100, the second flow guide space 82 is corresponding to the connection portion 47. Optionally, the inclined portion 70 further has a second recess 86. The second recess 86 can be configured to guide the secondary air above the connection portion 47 to the second guide space 82, to more fully supplement the secondary air for the outer ring fire hole 20.

[0326] Optionally, a plurality of outer ring fire holes 20 are arranged into a first fire hole row in a circumferential direction of the burner 100, and a plurality of outer ring fire holes 20 are arranged into a second fire hole row in the circumferential direction of the burner 100. The first fire hole row and the second fire hole row are spaced apart from each other in the axial direction of the burner 100. The outer ring fire holes 20 of the first fire hole row are offset from the outer ring fire holes 20 of the second fire hole row in the axial direction of the burner 100.

[0327] Optionally, the first fire hole row is closer to a top of the outer ring fire cover 16 than the second fire hole row. The plurality of outer ring fire holes 20 of the first fire hole row are located between two adjacent first flow guide spaces 80 in the circumferential direction of the burner 100. Each of the plurality of outer ring fire holes 20 of the second fire hole row is corresponding to the first flow guide space 80 in the axial direction of the burner 100.

[0328] In summary, in the burner according to the embodiments of the present application, the gas distribution plate 14 has the through hole 29 and the secondary air cavity 69, in such a manner that the secondary air can be supplemented efficiently and quickly, the performance of the burner 100 can be improved, and the yellow flames can be reduced. An air channel structure is designed on the base 12, which can efficiently and quickly supplement the primary air and the secondary air, improve the performance of the burner 100, and reduce the yellow flames.

[0329] A cooker according to the embodiments of the present application includes the burner 100 according to any one of the above embodiments.

[0330] With the above cooker, a plurality of secondary air channels 88 are arranged at the base 12. The secondary air channel 88 is in communication with the inner ring fire hole 42, which can allow the secondary air to be continuously supplemented to improve the performance of the burner 100. The plurality of primary air channels 87 and the plurality of secondary air channels 88 are arranged at intervals in the circumferential direction of the burner 100, which can reduce the resistance in the hot state to increase the supplemental flow rate of the air, supplying the sufficient primary air and secondary air to the burner 100.

[0331] Specifically, the cooker includes, but is not limited to, a gas cooker, an integrated cooker, an oven, and the like. The cooker may include one or more burners 110.

[0332] Reference throughout this specification to "an embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples" means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. The appearances of the above phrases in various places throughout this specification are not necessarily referring to the same embodiment or example. Further, particular features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0333] Although embodiments of the present application have been illustrated and described, it is conceivable for those skilled in the art that various changes, modifications, replacements, and variations can be made to these embodiments without departing from the principles and spirit of the present application. The scope of the present application shall be defined by the claims as appended and their equivalents.

Claims

1. A burner (100, 200, 300), comprising: a base (12, 102, 202); a gas distribution plate (14, 104, 204) arranged at the base (12, 102, 202); and an outer ring fire cover (16, 106, 206) arranged at the gas distribution plate (14, 104, 204), wherein: an outer ring gas mixing cavity (18, 116, 210) is defined by the outer ring fire cover (16, 106, 206) and the gas distribution plate (14, 104, 204); an outer ring fire hole (20, 118, 234) in communication with the outer ring gas mixing cavity (18, 116, 210) is formed on a circumferential side surface of the outer ring fire cover (16, 106, 206); a flow guide space (22, 178, 258) is formed at a junction between the circumferential side surface of the outer ring fire cover (16, 106, 206) and a top surface of the outer ring fire cover (16, 106, 206); and the flow guide space (22, 178, 258) is configured to guide secondary air above the outer ring fire cover (16, 106, 206) to the circumferential side surface of the outer ring fire cover (16, 106, 206).

2. The burner (100, 200, 300) according to claim 1, wherein: the gas distribution plate (14, 104, 204) comprises an intermediate portion (32, 108, 224) and an outer ring portion (30, 49 110) connected to the intermediate portion (32, 108, 224); the outer ring portion (30, 49 110) is arranged around the intermediate portion (32, 108, 224); the intermediate portion (32, 108, 224) has an inner ring gas mixing cavity (112, 228) and an inner ring fire hole (42, 114, 230) in communication with the inner ring gas mixing cavity (112, 228); and the outer ring fire cover (16, 106, 206) is arranged at the outer ring portion (30, 49 110), and the outer ring gas mixing cavity (18, 116, 210) is defined by the outer ring fire cover (16, 106, 206) and the outer ring portion (30, 49 110).

3. The burner (100, 200, 300) according to claim 1, wherein: the gas distribution plate (14, 104, 204) comprises an outer ring portion (30, 49, 110); the outer ring fire cover (16, 106, 206) is arranged at the outer ring portion (30, 49, 110), and the outer ring gas mixing cavity (18, 116, 210) is defined by the outer ring fire cover (16, 106, 206) and the outer ring portion (30, 49, 110); the outer ring fire cover (16, 106, 206) has a plurality of middle ring fire holes (72, 212) arranged at intervals in a circumferential direction of the burner (100, 200, 300), and the plurality of middle ring fire holes (72, 212) are in communication with the outer ring gas mixing cavity (18, 35, 116, 210); a plurality of flame stabilization grooves (66, 214) in communication with the outer ring gas mixing cavity (18, 116, 210) are formed on a surface of the outer ring portion (30, 49, 110) towards a central axis of the burner (100, 200, 300), the plurality of flame stabilization grooves (66, 214) are arranged at intervals in the circumferential direction of the burner (100, 200, 300), and the plurality of flame stabilization grooves (66, 214) are in one-to-one correspondence with the plurality of middle ring fire holes (72, 212) in a direction parallel to the central axis of the burner (100, 200, 300); and the circumferential side surface of the outer ring fire cover (16, 106, 206) faces away from the central axis of the burner (100, 200, 300).

4. The burner (100, 200, 300) according to claim 1, wherein: the base (12, 102, 202) has a bottom gas mixing cavity (21, 24, 120, 218); a surface of the base (12, 102, 202) facing towards the gas distribution plate (14, 104, 204) is provided with a plurality of ribs (23, 152) arranged at intervals in a circumferential direction of the burner (100, 200, 300), and an air channel is formed between two adjacent ribs (23, 152) of the plurality of ribs (23, 152) and has primary air channels (87, 134, 216) and secondary air channels (88, 154, 250) that are alternately arranged in the circumferential direction of the burner (100, 200, 300); the primary air channels (87, 134, 216) are in communication with the bottom gas mixing cavity (21, 24, 120, 218), and the gas distribution plate (14, 104, 204) has a plurality of through holes (29), each of the plurality of through holes (29) in communication with one of the secondary air channels (88, 154, 250); the burner (100, 200, 300) further comprises a central fire cover (17) arranged at the gas distribution plate (14, 104, 204), and a central gas mixing cavity (31) is defined by the central fire cover (17) and the gas distribution plate (14, 104, 204); the central fire cover (17) has inner ring fire holes (42, 114, 230) in communication with the central gas mixing cavity (31), and the inner ring fire holes (42, 114, 230) are in communication with the secondary air channels (88, 154, 250) through the plurality of through holes (29), respectively; and the circumferential side surface of the outer ring fire cover (16, 106, 206) faces away from the central fire cover (17).

5. The burner (100, 200, 300) according to any one of claims 1 to 4, wherein the flow guide space (22, 178, 258) is a groove formed at the junction between the circumferential side surface of the outer ring fire cover (16, 106, 206) and the top surface of the outer ring fire cover (16, 106, 206).

6. The burner (100, 200, 300) according to claim 5, wherein the groove has a width that gradually increases in a direction away from a bottom of the groove.

7. The burner (100, 200, 300) according to claim 5, wherein the groove is connected to the circumferential side surface of the outer ring fire cover (16, 106, 206) and the top surface of the outer ring fire cover (16, 106, 206) obliquely relative to a horizontal plane.

8. The burner (100, 200, 300) according to claim 5, wherein: the groove comprises a first groove (52) and a second groove (54); a plurality of the first grooves form a first groove group (56) in a circumferential direction of the burner (100, 200, 300); one second groove (54) is arranged between two adjacent first groove groups (56); and the second groove (54) has a greater width than the first groove (52).

9. The burner (100, 200, 300) according to claim 8, wherein: in an axial direction of the burner (100, 200, 300), a part of the circumferential side surface of the outer ring fire cover (16, 106, 206) corresponding to the second groove (54) is a second region (58); the remaining part of the circumferential side surface of the outer ring fire cover (16, 106, 206) is a first region (60); and the second region (58) has a smaller fire hole density than the first region (60).

10. The burner (100, 200, 300) according to any one of claims 1 to 4, wherein: a plurality of outer ring fire holes (20, 118, 234) are arranged into a first fire hole row (62) in a circumferential direction of the burner (100, 200, 300); and a plurality of outer ring fire holes (20, 118, 234) are arranged into a second fire hole row (64) in the circumferential direction of the burner (100, 200, 300); the first fire hole row (62) and the second fire hole row (64) are spaced apart from each other in an axial direction of the burner (100, 200, 300); and the plurality of outer ring fire holes (20, 118, 234) of the first fire hole row (62) are offset from the plurality of outer ring fire holes (20, 118, 234) of the second fire hole row (64) in the axial direction of the burner (100, 200, 300).

11. The burner (100, 200, 300) according to claim 10, wherein: the first fire hole row (62) is closer to a top of the outer ring fire cover (16, 106, 206) than the second fire hole row (64); the plurality of outer ring fire holes (20, 118, 234) of the first fire hole row (62) are located between two adjacent flow guide spaces (22, 178, 258) in the circumferential direction of the burner (100, 200, 300), and each of the plurality of outer ring fire holes (20, 118, 234) of the second fire hole row (64) corresponds to the flow guide space (22, 178, 258) in the axial direction of the burner (100, 200, 300).

12. The burner (100, 200, 300) according to claim 1, further comprising a flame stabilization groove (66, 214) in a ring shape, wherein: the flame stabilization groove (66, 214) is located at a side of the outer ring fire hole (20, 118, 234) away from the outer ring fire cover (16, 106, 206); and the flame stabilization groove (66, 214) is in communication with the outer ring gas mixing cavity (18, 35, 116,210).

13. The burner (100, 200, 300) according to claim 2, wherein: the gas distribution plate (14, 104, 204) comprises an ejection tube (43, 136) connected at a side of the intermediate portion (32, 108, 224) towards the base (12, 102, 202); the ejection tube (43, 136) has an ejection channel (138) in communication with the inner ring gas mixing cavity (112, 228); and the intermediate portion (32, 108, 224) comprises a top plate (140) towards the ejection channel (138), and the inner ring fire hole penetrating the top plate (140).

14. The burner (100, 200, 300) according to claim 4, wherein: the flow guide space (22, 178, 258) comprise a first flow guide space (80) and a second flow guide space (82); a plurality of the first flow guide spaces (80) form a first flow guide group (84) in the circumferential direction of the burner (100, 200, 300); one second flow guide space (82) is arranged between two adjacent first flow guide groups (84); and the second flow guide space has a greater width than the first flow guide space.

15. A cooker, comprising the burner (100, 200, 300) according to any one of claims 1 to 14.

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