Combustor and gas cooker comprising same

Abstract

The utility model provides a combustor and a gas stove including the same, the combustor comprises a multi-ring combustion part which is sequentially arranged along the radial direction of the combustor, the multi-ring combustion part of the combustor comprises a first combustion part and a second combustion part, a first gas mixing chamber of the first combustion part is communicated with a gas source through a first gas distribution port, and a second gas mixing chamber of the second combustion part is communicated with a second gas distribution port. A second gas mixing chamber of the second combustion part communicates with a gas source through a second gas distribution port, and at least part of the first gas distribution port and at least part of the second gas distribution port are arranged in the circumferential direction of the combustor. By adjusting the arrangement positions of the gas distribution ports corresponding to the two rings in the multi-ring combustion part, the space, for arranging a secondary air channel, of the combustor is increased, meanwhile, the resistance of the gas distribution ports to airflow flowing through gas is smaller, gas outlet is smoother, gas combustion is more sufficient, and the heat efficiency is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of stoves, in particular to a burner and a gas stove comprising the burner. Background Art

[0002] At present, multi-channel and multi-ring fire burners have gradually become an important branch of household gas stoves because of their strong fire control capabilities and diverse flame layout types.

[0003] However, since this type of burner has multiple channels and multiple fire rings, relatively more gas channels will occupy a larger circumferential space of the burner, resulting in a corresponding reduction in the space available for the secondary air channel, which is not conducive to the supplement of secondary air and affects the combustion performance of the burner. In addition, the usual burner structure setting scheme is to set a fire cover separately for each fire ring, resulting in a burner head with an excessively large diameter and low thermal efficiency. At the same time, this type of burner needs to arrange multiple gas channels in a relatively limited space, resulting in a smaller channel size for a single gas channel, which in turn increases the gas flow resistance in the channel, restricting the heating power of the burner, making it difficult to increase the thermal load of the multi-channel multi-fire burner. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art that the multi-channel multi-ring fire burner has insufficient space for setting the secondary air channel and the gas flow resistance is large, which restricts the increase of its heat load, and to provide a burner and a gas cooker including the same.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] A burner, comprising a multi-ring combustion portion, the multi-ring combustion portion comprising a first combustion portion and a second combustion portion arranged in sequence along the radial direction of the burner, the first combustion portion being connected to a gas source through a first gas distribution port, the second combustion portion being connected to a gas source through a second gas distribution port, at least a portion of the first gas distribution port and the second gas distribution port being arranged along the circumferential direction of the burner;

[0007] The number of the first air distribution ports is at least two, and along the circumferential direction of the burner, the second air distribution port is located between the two first air distribution ports.

[0008] In this burner, when its multi-ring combustion parts are arranged in sequence along the radial direction, the first air distribution port corresponding to the first combustion part and the second air distribution port corresponding to the second combustion part are arranged along the circumferential direction, so as to utilize the principle that the circumference of the ring is greater than the circumference of the inner circle under the same area, so that the outlet area in the circumferential area of ​​the burner can be relatively more utilized. Therefore, the use of this arrangement can maximize the space utilization rate of the air distribution ports, reduce the space occupied by the air distribution ports in the circumferential direction, and make the area not occupied by the air distribution ports available for the secondary air channel arrangement of the burner, so as to improve the secondary air replenishment effect of the burner. In addition, the load of the combustion section is positively correlated with the outlet area of ​​the corresponding air distribution port. This scheme of circumferentially arranging the air distribution ports can flexibly adjust the size and position of the first air distribution port and the second air distribution port according to different fire load distribution requirements, and can also reduce the occupancy of the first air distribution port and the second air distribution port in the radial direction to avoid encroaching on the setting space of other combustion sections except the first combustion section and the second combustion section. The saved space can avoid the narrowing of the flow channel for secondary air flow between other combustion sections, and also facilitates the installation of components such as ignition needles and thermocouple assemblies.

[0009] At the same time, under the same opening area, the circumference of the first gas distribution port and the second gas distribution port arranged along the circumferential direction is smaller than that of the two ports arranged along the radial direction. Therefore, when the gas airflow resistance flowing through the gas distribution port is proportional to the circumference of the gas distribution port, the scheme of arranging the first gas distribution port and the second gas distribution port along the circumferential direction has smaller airflow resistance flowing through the gas, thereby ensuring the smoothness of the gas flow.

[0010] Specifically, two first gas distribution ports are arranged on both sides of the second gas distribution port along the circumferential direction of the burner, so that the uniformity of the gas in the first combustion part is improved by distributing the first gas distribution ports, and the concentration of the gas is avoided. At the same time, when the first combustion part is working, the flame temperature is mainly transferred downward through the first gas distribution ports. By distributing the first gas distribution ports, the heat is transferred downward more evenly, and the problem of insufficient gas preheating caused by uneven heat transfer can be avoided.

[0011] Therefore, through this structural setting scheme, by adjusting the arrangement positions of the gas distribution ports corresponding to two of the multi-ring combustion parts, the space for the secondary air channel of the burner can be increased. At the same time, the gas distribution ports have less resistance to the air flow through the gas, making the gas outlet smoother, the gas combustion more complete, and the thermal efficiency higher. By achieving the same heat load and secondary air supply under a relatively smaller burner head diameter size, the firepower is more concentrated and the thermal efficiency of the burner can also be improved.

[0012] Preferably, the first combustion part further includes a first gas mixing chamber, the second combustion part further includes a second gas mixing chamber, the first gas distribution port is connected to the gas source through the first gas mixing chamber, and the second gas distribution port is connected to the gas source through the second gas mixing chamber;

[0013] At least parts of the first gas mixing chamber and the second gas mixing chamber are overlapped in the vertical direction.

[0014] This structural arrangement scheme, by making at least part of the first gas mixing chamber and the second gas mixing chamber overlap in the vertical direction, in response to the arrangement of the connected first gas distribution port and the second gas distribution port within the same circumference, makes the structure of the first gas mixing chamber conveying gas to the first gas distribution port and the structure of the second gas mixing chamber conveying gas to the second gas distribution port not affect each other, which is beneficial to the arrangement of the first gas mixing chamber and the second gas mixing chamber in the burner. At the same time, making the first gas mixing chamber and the second gas mixing chamber overlap in the vertical direction can reduce the circumference of the flow channel section of the first gas mixing chamber and the second gas mixing chamber at this location, thereby reducing the flow resistance.

[0015] Preferably, along the gas flow direction, an extension channel is provided at the end of the second gas mixing chamber, the extension channel is used to be directly connected to the second gas distribution port, and the extension channel is formed above the first gas mixing chamber.

[0016] This structural arrangement is particularly suitable for the case where there are multiple first gas distribution ports and second gas distribution ports, and the first gas distribution ports and the second gas distribution ports are arranged in a staggered manner. By arranging an extension channel at the end of the second gas mixing chamber along the gas flow direction, the extension channel extends to the top of the first gas mixing chamber to communicate with the second gas distribution port, and the gas in the first gas mixing chamber flows below the extension channel and is correspondingly delivered to the first gas distribution port, so that the structural arrangement of the first gas mixing chamber and the second gas mixing chamber is simpler.

[0017] At the same time, the structural setting scheme can also reduce the volume of the burner in the height direction and width direction where the first mixing chamber and the second mixing chamber are set, which is convenient for the arrangement design of each combustion channel in the burner and the fixed installation of the burner.

[0018] Preferably, the burner further comprises a base, the first gas mixing chamber and the second gas mixing chamber are both formed in the base, the first gas mixing chamber and the second gas mixing chamber are separated by a partition, and the extension channel is integrally formed on the partition.

[0019] By integrally forming the extension channel on the partition for separating the first mixing chamber from the second mixing chamber, the purpose of compact design and compact layout of the burner can be achieved. At the same time, the integrated molding solution can improve the isolation between the first mixing chamber and the second mixing chamber and reduce the risk of gas leakage.

[0020] Preferably, the gas load of the first combustion section is greater than that of the second combustion section.

[0021] When the gas load of the second combustion part is relatively small and the gas load of the first combustion part is relatively large, an extension channel is selected to be set at the second gas mixing chamber corresponding to the second combustion part, so that the layout position of the second gas mixing chamber is relatively higher than the first gas mixing chamber. Through this layout scheme, the length of the gas flow channel of the first gas mixing chamber is longer than that of the second gas mixing chamber, so that the length of the gas flow channel can adapt to the larger gas load of the first combustion part.

[0022] Preferably, the burner further comprises a base and a gas distribution plate, the first gas distribution port and the second gas distribution port are both formed on the gas distribution plate, and the base and the gas distribution plate are stacked from bottom to top;

[0023] The first gas mixing chamber is surrounded by the base and the gas distribution plate; and / or,

[0024] The second gas mixing chamber is surrounded by the base and the gas distribution plate.

[0025] This structural setting scheme forms the first mixing chamber and the second mixing chamber by combining the base and the gas distribution plate, thereby achieving the purpose of simplifying the burner structure and facilitating the cleaning and maintenance of the first mixing chamber and the second mixing chamber.

[0026] Preferably, the burner further comprises a fire cover, and the fire cover is arranged above the gas distribution plate;

[0027] Along the axial direction of the burner, the secondary air passage of the burner is formed between the base and the fire cover; and / or,

[0028] Along the circumferential direction of the burner, the secondary air passage is disposed at two of the first air distribution ports, or two of the second air distribution ports, or between the first air distribution port and the second air distribution port.

[0029] This structural setting scheme defines the setting position of the secondary air channel in the circumferential direction through an air distributor plate, so as to form the secondary air channel by utilizing other areas of the air distributor plate except for the first air distributor port and the second air distributor port, thereby increasing the setting space of the secondary air channel.

[0030] Preferably, the burner further comprises a gas distribution plate and a fire cover, the first gas distribution port and the second gas distribution port are both formed on the gas distribution plate, and the gas distribution plate and the fire cover are stacked from bottom to top;

[0031] The first gas mixing chamber is surrounded by the gas distribution plate and the fire cover; and / or,

[0032] The second gas mixing chamber is surrounded by the gas distribution plate and the fire cover.

[0033] This structural setting scheme forms the first mixing chamber and the second mixing chamber by combining the gas distribution plate and the fire cover, thereby achieving the purpose of simplifying the burner structure and facilitating the cleaning and maintenance of the first mixing chamber and the second mixing chamber.

[0034] Preferably, the gas distribution plate further comprises a first gas guide portion, the first gas guide portion is formed above the first gas distribution port, and the first gas guide portion is used to guide the gas flowing out of the first gas distribution port toward the first gas mixing chamber; and / or,

[0035] The gas distribution plate also has a second gas guide portion, which is formed above the second gas distribution port and is used to guide the gas flowing out of the second gas distribution port toward the second gas mixing chamber.

[0036] By arranging a first gas guide portion on the gas distribution plate, the purpose of changing the flow direction of the gas flowing out of the first gas distribution port is achieved to meet the gas flow requirements of transitioning from the first gas distribution port and the second gas distribution port arranged on the same circumference to the concentrically arranged first gas mixing chamber and the second gas mixing chamber.

[0037] By arranging a second gas guide portion on the gas distribution plate, the purpose of changing the flow direction of the gas flowing out of the second gas distribution port is achieved to meet the gas flow requirements of transitioning from the first gas distribution port and the second gas distribution port arranged on the same circumference to the concentrically arranged first gas mixing chamber and the second gas mixing chamber.

[0038] Among them, the first gas guide part and the second gas guide part are set at the same time to guide the gas of the first gas distribution port and the gas of the second gas distribution port respectively, which can reduce the path length for guiding the flow direction of a single gas, thereby reducing the pressure loss caused by guiding the gas flow direction.

[0039] Preferably, the first gas mixing chamber and the second gas mixing chamber are separated by an annular partition of the gas distribution plate, and the first gas guide portion and / or the second gas guide portion are integrally formed on the annular partition.

[0040] The first gas guide part and the second gas guide part are integrally formed on an annular partition for separating the first gas mixing chamber and the second gas mixing chamber, so as to achieve the purpose of compact design and compact layout of the burner. At the same time, the integrated molding solution can improve the isolation between the first gas mixing chamber and the second gas mixing chamber, thereby reducing the risk of gas leakage.

[0041] Preferably, the first air mixing chamber of the first combustion part is connected to the gas source through a first air distribution port, the second air mixing chamber of the second combustion part is connected to the gas source through a second air distribution port, and the first air mixing chamber and the second air mixing chamber of the burner are arranged adjacent to each other.

[0042] By arranging the first gas mixing chamber and the second gas mixing chamber adjacent to each other, the structure of the burner is made more compact. At the same time, it is convenient to further arrange the positions of the first gas distribution port and the second gas distribution port, thereby reducing the influence of arranging the first gas distribution port and the second gas distribution port in the same circle on the gas flow.

[0043] Preferably, the first air mixing chamber and the second air mixing chamber of the burner are formed on the same fire cover.

[0044] By forming the first air mixing chamber and the second air mixing chamber on the same fire cover, the first air mixing chamber and the second air mixing chamber can be arranged relatively closer, and the structure of the burner is further simplified.

[0045] Preferably, the burner is a three-channel three-ring fire burner, the first combustion section of the burner is a middle-ring combustion section, and the second combustion section of the burner is an outer-ring combustion section.

[0046] In the case of a three-channel three-ring fire burner, the middle ring combustion part and the outer ring combustion part are tightly fitted together so that the overall diameter of the three-channel three-ring fire burner can be reduced. Therefore, this structural setting scheme can make the heating capacity of the burner more efficient and more uniform when the burner load increases.

[0047] In addition, usually the load of the middle ring combustion part will be greater than that of the outer ring combustion part. By arranging the middle ring combustion part relatively close to the center, when the burner is in high load mode, the firepower of the entire burner can be more concentrated and the heating efficiency can be higher. Specifically, in the cooking process, high firepower is usually required in stir-frying, and the pot used is a pointed pot, so the food will be concentrated in the center of the bottom of the pot, corresponding to the inner ring combustion part and the middle ring combustion part area of ​​the burner. Therefore, in this solution, by relatively increasing the load of the middle ring combustion part to make it greater than the outer ring combustion part, the heating capacity of the food in the pointed pot is improved to meet the concentrated high-fire heating needs of stir-frying.

[0048] Preferably, the burner comprises a gas distribution plate, the first gas distribution port and the second gas distribution port are both formed on the gas distribution plate, the gas distribution plate comprises a first gas distribution portion and a second gas distribution portion, and the first gas distribution portion and the second gas distribution portion are stacked in a direction from bottom to top;

[0049] Along the gas flow direction, the front section of the first gas distribution port is formed on the first gas distribution portion, and the rear section of the first gas distribution port is formed on the second gas distribution portion; and / or,

[0050] Along the gas flow direction, the front section of the second gas distribution port is formed on the first gas distribution portion, and the rear section of the second gas distribution port is formed on the second gas distribution portion.

[0051] This structural arrangement scheme forms a gas distribution plate by arranging parts and combining them with each other, thereby achieving the purpose of simplifying the burner structure, so that a relatively complex structure can be realized by processing and combining parts.

[0052] Preferably, along the axial direction of the burner, the secondary air passage of the burner is formed between the first air distribution part and the second air distribution part;

[0053] Along the circumferential direction of the burner, the secondary air passage is located between the first air distribution port and the second air distribution port.

[0054] A relatively better arrangement scheme for the secondary air passage is provided, wherein the secondary air passage is formed between the first air splitter and the second air splitter, so as to form a hollow passage structure of the secondary air passage by utilizing the relative combination relationship of the first air splitter and the second air splitter. At the same time, the secondary air passage is located between the first air splitter port and the second air splitter port, so as to utilize the remaining space between the first air splitter port and the second air splitter port to transport the secondary air for the gas of the burner to be fully burned.

[0055] Preferably, along the radial direction of the burner, at least a portion of the second air distribution port protrudes from the first air distribution port, the portion of the second air distribution port protruding from the first air distribution port extends toward the first air distribution port along the circumferential direction of the burner, and is arranged adjacent to the first air distribution port along the radial direction of the burner.

[0056] When the sizes of the two air distribution ports along the radial direction of the burner are inconsistent, the protruding portion of the relatively protruding second air distribution port is extended toward the first air distribution port, so that the arrangement between the two air distribution ports is more compact, thereby saving the space occupied by the air distribution ports.

[0057] Preferably, the first gas distribution port and the second gas distribution port are arranged adjacent to each other.

[0058] The first gas distribution port and the second gas distribution port are arranged adjacent to each other, and their layout is relatively compact, so that the sealing ring length required for the burner to perform overall sealing on the first gas distribution port and the second gas distribution port is relatively smaller, thereby reducing the risk of gas leakage by reducing the sealing ring length.

[0059] At the same time, the first air distribution port and the second air distribution port are arranged compactly, and the space not occupied by the first air distribution port and the second air distribution port in the circumferential direction can be increased, so that the size of the secondary air channel set up using the unoccupied space can be further increased, thereby improving the secondary air replenishment capacity of the burner.

[0060] Preferably, the plurality of first gas distribution ports are evenly arranged on a circle with the central axis of the burner as the center.

[0061] Preferably, there are a plurality of the second gas distribution ports, and the plurality of the second gas distribution ports are evenly arranged in a circle with the central axis of the burner as the center.

[0062] When there are multiple gas distribution ports in a single gas mixing chamber, the gas uniformity of the gas entering the corresponding gas mixing chamber through the gas distribution ports is improved by arranging them symmetrically with the central axis of the burner as the center, thereby improving the heating effect of the burner.

[0063] A gas cooker comprises the burner as described above.

[0064] The gas cooker increases the space for setting the secondary air passage of the burner by adjusting the arrangement positions of the gas distribution ports corresponding to two of the rings in the multi-ring combustion part. At the same time, the gas distribution ports have less air flow resistance to the gas flowing through, so that the gas outlet is smoother, the gas burns more fully and has higher thermal efficiency.

[0065] The positive and progressive effects of the utility model are:

[0066] (1) By adjusting the layout position relationship between the first air distribution port and the second air distribution port, the burner reduces the space occupied by the first air distribution port and the second air distribution port in the circumferential direction of the burner, so that the burner can provide more space for setting the secondary air channel to increase the secondary air replenishment amount.

[0067] (2) Under the same opening area, the circumference of the first gas distribution port and the second gas distribution port arranged along the circumferential direction is smaller than that of the first gas distribution port and the second gas distribution port arranged along the radial direction, so that the scheme of arranging the first gas distribution port and the second gas distribution port along the circumferential direction has smaller air flow resistance passing through the gas, thereby ensuring the smoothness of the gas flow.

[0068] (3) By adjusting the arrangement positions of the gas distribution ports corresponding to two of the multi-ring combustion sections, the space for setting up the secondary air passage of the burner can be increased. At the same time, the gas distribution ports have less air flow resistance to the gas flowing through them, and the gas outlet is smoother, so that the gas burns more fully and has a higher thermal efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 It is a schematic diagram of the three-dimensional structure of the burner of Example 1 of the utility model.

[0070] Figure 2 This is a schematic diagram of the three-dimensional structure of the burner of Example 1 of the utility model, wherein the outer fire cover is hidden.

[0071] Figure 3 It is a schematic diagram of the three-dimensional structure of the burner of Example 1 of the utility model, wherein the outer fire cover and the second air distribution part of the air distribution plate are hidden.

[0072] Figure 4 This is a schematic diagram of the top view of the burner of Example 1 of the utility model.

[0073] Figure 5 for Figure 4 Cross-sectional view of the AA portion.

[0074] Figure 6 for Figure 4 Cross-sectional view of the BB part.

[0075] Figure 7 This is a schematic diagram of the three-dimensional structure of the burner of Example 1 of the utility model, in which the outer fire cover and the gas distribution plate are hidden.

[0076] Figure 8 It is a schematic diagram of the three-dimensional structure of the base of Example 1 of the utility model.

[0077] Fig. 9 It is a schematic diagram of the three-dimensional structure of the gas distribution plate of Example 1 of the utility model.

[0078] Fig.10 This is a schematic diagram of the layout of the gas distribution ports of the gas distribution plate in Example 1 of the utility model.

[0079] Fig.11 This is a schematic diagram of the layout of the gas distribution ports of the gas distribution plate in Example 2 of the utility model.

[0080] Fig.12 This is a schematic diagram of the layout of the gas distribution ports of the gas distribution plate in Example 3 of the present utility model.

[0081] Description of reference numerals:

[0082] Burner 100, circumferential direction X, radial direction Y, axial direction Z, secondary air passage 101 inner ring combustion part 1

[0083] Middle ring combustion section 2, first gas mixing chamber 21

[0084] Outer ring combustion unit 3, second air mixing chamber 31

[0085] External fire cover 4

[0086] Gas distribution plate 5, first gas distribution port 51, second gas distribution port 52, first gas distribution part 53, second gas distribution part 54, baffle 55

[0087] Base 6, first gas mixing chamber 61, second gas mixing chamber 62, extension channel 63

[0088] Inner ring ejector tube 71

[0089] Central ring ejector 72

[0090] Outer ring ejector tube 73 DETAILED DESCRIPTION

[0091] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0092] Example 1

[0093] like Figure 1 As shown, this embodiment provides a burner 100, specifically a three-channel three-ring flame burner, which is used in a gas cooker. The three-ring flame (inner ring flame, middle ring flame and outer ring flame) is controlled to burn and extinguish respectively through three groups of gas channels to achieve different flame combinations to meet different heating and cooking needs of users. Figure 1 As shown, the circumferential direction of the burner 100 is defined as X, the radial direction as Y, and the axial direction as Z. Figure 1 It can be seen that the burner 100 is arranged with three rings of combustion parts from the inside to the outside along its radial direction Y, namely the inner ring combustion part 1, the middle ring combustion part 2 (equivalent to the first combustion part) and the outer ring combustion part 3 (equivalent to the second combustion part). Among them, the middle ring combustion part 2 and the outer ring combustion part 3 are formed on the same fire cover, that is, they are formed on the outer fire cover 4 at the same time, but the gas channels between the two combustion parts are relatively separated to achieve separate opening and closing. Among them, the inner ring combustion part 1 is connected to the inner ring ejector pipe 71 in the middle, and gas is supplied through the gas nozzle at the inner ring ejector pipe 71. The middle ring combustion part 2 is connected to the middle ring ejector pipe 72 on the right, and gas is supplied through the gas nozzle at the middle ring ejector pipe 72. The outer ring combustion part 3 is connected to the outer ring ejector pipe 73 on the left, and gas is supplied through the gas nozzle at the outer ring ejector pipe 73. The gas at each ejector pipe flows through the base 6 and the gas distribution plate 5 respectively, and flows to the corresponding combustion part after being distributed by the base 6 and the gas distribution plate 5.

[0094] like Figure 2 As shown, after hiding the outer fire cover 4, it can be seen that the first air mixing chamber 21 and the second air mixing chamber 31 are formed by combining the outer fire cover 4 and the air distribution plate 5. This scheme of forming the first air mixing chamber 21 and the second air mixing chamber 31 by combination can simplify the structure of the burner 100, and at the same time facilitate the cleaning and maintenance of the first air mixing chamber 21 and the second air mixing chamber 31.

[0095] Specifically, a first gas mixing chamber 21 is provided in the middle ring combustion section 2, and the first gas mixing chamber 21 is connected to the gas source through a first gas distribution port 51 located on the gas distribution plate 5 (that is, connected to the middle ring ejector pipe 72 in this embodiment). At the same time, a second gas mixing chamber 31 is provided in the outer ring combustion section 3, and the second gas mixing chamber 31 is connected to the gas source through a second gas distribution port 52 located on the gas distribution plate 5 (that is, connected to the outer ring ejector pipe 73 in this embodiment). In order to adapt to the annular flame layout of multi-ring fire, the first gas mixing chamber 21 and the second gas mixing chamber 31 are concentrically arranged with the axial direction Z of the burner 100 as the center. At the same time, as Figure 3 As shown, the gas distribution plate 5 in this embodiment is composed of a first gas distribution part 53 and a second gas distribution part 54 stacked in a vertical direction. After hiding the second gas distribution part 54 located on the upper side, it can be seen that: different from the layout between the first gas mixing chamber 21 and the second gas mixing chamber 31, the first gas distribution port 51 and the second gas distribution port 52 located on the gas distribution plate 5 are arranged along the circumferential direction X of the burner 100. By adjusting the layout of the first gas distribution port 51 and the second gas distribution port 52, the first gas distribution port 51 and the second gas distribution port 52 are arranged in a layout different from the first gas mixing chamber 21 and the second gas mixing chamber 31, so that the heat load of the burner 100 can be improved. Among them, the circumferential direction X refers to the direction indicated by the circumference of the same radius. Therefore, the first gas distribution port 51 and the second gas distribution port 52 are arranged along the circumferential direction X of the burner 100, so that at least part of the first gas distribution port 51 and the second gas distribution port 52 overlap in the direction indicated by the circumference of the same radius.

[0096] Specifically, when the three-ring combustion parts of the burner 100 are arranged in sequence along the radial direction Y, the first air distribution port 51 corresponding to the middle ring combustion part 2 and the second air distribution port 52 corresponding to the outer ring combustion part 3 are arranged along the circumferential direction X, so as to utilize the principle that the circumference of the ring is greater than the circumference of the inner circle under the same area, so that the outlet area of ​​the circumferential area of ​​the burner 100 can be relatively more utilized. The scheme of arranging the air distribution ports in the circumferential direction X adopted in this embodiment can maximize the space utilization rate of the burner at this location, reduce the space occupied by the air distribution ports in the circumferential direction X, so that the area not occupied by the air distribution ports can be used for the secondary air channel 101 of the burner 100 to be arranged along the radial direction Y, so as to improve the secondary air replenishment effect of the burner 100 by increasing the channel cross-sectional size of the secondary air channel 101.

[0097] At the same time, under the same opening area, the circumference of the first gas distribution port 51 and the second gas distribution port 52 arranged along the circumferential direction X is smaller than that of the two arranged along the radial direction Y. Therefore, when the gas airflow resistance flowing through the gas distribution port is proportional to the circumference of the gas distribution port, the scheme of arranging the first gas distribution port 51 and the second gas distribution port 52 along the circumferential direction X has smaller airflow resistance flowing through the gas, thereby ensuring the smoothness of the gas flow.

[0098] Through this structural setting scheme, that is, adjusting the arrangement positions of the air distribution ports corresponding to two of the multi-ring combustion sections, not only the space of the burner 100 for setting the secondary air channel 101 along the radial direction Y is increased. In addition, this structural setting scheme can also reduce the occupation of the first air distribution port and the second air distribution port in the radial direction, avoid occupying the setting space of other combustion sections except the middle ring combustion section 2 and the outer ring combustion section 2, so that the spacing between the middle ring combustion section 2 and other internal combustion sections can be increased, so as to provide space for the secondary air channel 101 to be arranged along the circumferential direction X after extending to the inside of the burner, and also avoid the fire hole of the middle ring combustion section 2 being too close to the secondary air channel 101 arranged along the circumferential direction X, and excessive consumption of secondary air there. By improving the ability to replenish secondary air to the inside of the burner, the firepower inside the burner can be increased, making the firepower larger and more concentrated, and improving the heating efficiency.

[0099] At the same time, the gas distribution port has less resistance to the air flow passing through the gas, the gas outlet of the burner 100 is smoother, the gas burns more completely, and the thermal efficiency is higher.

[0100] In addition, if Fig.10 As shown, in this embodiment, there are two first gas distribution ports 51, and along the circumferential direction X of the burner 100, the second gas distribution port 52 is located between the two first gas distribution ports 51. Specifically, the two first gas distribution ports 51 are arranged on both sides of the second gas distribution port 52 along the circumferential direction of the burner, so as to improve the uniformity of the gas in the middle ring combustion section 2 and avoid gas concentration by distributing the first gas distribution ports 51 on the plane of the burner 100. At the same time, when the middle ring combustion section 2 is working, the flame temperature is mainly transferred downward through the first gas distribution ports 51. By distributing the first gas distribution ports 51, the heat is transferred downward more evenly, which can avoid the problem of insufficient gas preheating caused by uneven heat transfer.

[0101] At the same time, if Fig.10As shown, in this embodiment, there are also two second gas distribution ports 52. Along the circumferential direction X of the burner 100, the first gas distribution port 51 is located between the two second gas distribution ports 52, that is, there are two first gas distribution ports 51 and two second gas distribution ports 52, which are alternately and evenly distributed along the circumferential direction X. By distributing the second gas distribution ports 52, the uniformity of the gas in the outer ring combustion section 3 can also be improved to avoid gas concentration. At the same time, when the outer ring combustion section 3 is working, the flame temperature is mainly transferred downward through the second gas distribution ports 52. By distributing the second gas distribution ports 52, the heat is transferred downward more evenly, which can avoid the problem of insufficient gas preheating caused by uneven heat transfer.

[0102] The specific flow direction of the gas in the middle ring combustion section 2 and the outer ring combustion section 3 is as follows: Figure 4-Figure 6 As shown, it shows the specific paths of the gases in the middle ring and outer ring channels flowing from the first gas distribution port 51 and the second gas distribution port 52 arranged in the same circumference to the first gas mixing chamber 21 and the second gas mixing chamber 31 arranged concentrically. Figure 4 As shown, the middle ring combustion part 2 mainly emits fire in the outer fire cover 4 in the form of evenly distributed circular fire holes, and the outer ring combustion part 3 mainly emits fire in the form of annular fire seams in the outer fire cover 4. The annular fire seams of the outer ring combustion part 3 are arranged on the outside of the outer fire cover 4, and the circular fire holes of the middle ring combustion part 2 are arranged on the inside of the outer fire cover 4. This arrangement of fire holes can improve the mutual influence between the fire holes of the middle ring combustion part 2 and the outer ring combustion part 3. Specifically: the fire holes of the outer ring combustion part 3 are annular fire seams, and the space occupied along the circumferential direction X is larger. When the fire holes of the outer ring combustion part 3 are opened, the secondary air flowing along the radial direction Y from the outside to the inside toward the fire cover will be consumed, so that the secondary air available for consumption at the circular fire holes of the middle ring combustion part 2 is relatively reduced, thereby reducing the flame temperature of the middle ring combustion part 2 at the circular fire holes, thereby realizing the switching between different combustion modes. When the outer ring combustion part 3 is opened, the flame of the middle ring combustion part 2 is affected by the outer ring combustion part 3, and the flame temperature is lower. This combustion mode of lowering the flame temperature of the middle ring combustion section when switching to a large-area flame can better meet the needs of large-area cooking. Specifically, actual users usually require a large-area flame when using a large-caliber frying pan. During the cooking process, what is needed more is uniform heating of all parts of the frying pan, rather than the size of the fire provided. Therefore, in this solution, when the outer ring combustion section 3 is turned on, the flame of the middle ring combustion section 2 is affected, thereby lowering the flame temperature of the middle ring combustion section 2, which can meet the user's demand for uniform heating when using a large-area flame.

[0103] The gas flow path of the middle ring combustion unit 2 is as follows: Figure 5 As shown, Figure 5The dotted arrows in the figure show the specific path of the gas flowing from the middle ring ejector tube 72 through the first gas mixing chamber 61 of the base 6 to the first gas distribution port 51 of the gas distribution plate 5, then flowing through the first gas distribution port 51 to the first gas mixing chamber 21, and finally flowing out from the corresponding fire hole on the outer fire cover 4. The gas flow path of the outer ring combustion part 3 is as follows Figure 6 As shown, Figure 6 The dotted arrows in the figure show the specific path of the gas flowing from the outer ring ejector tube 73 through the second gas mixing chamber 62 of the base 6 to the second gas distribution port 52 of the gas distribution plate 5, then flowing to the second gas mixing chamber 31 through the second gas distribution port 52, and finally flowing out from the corresponding fire hole on the outer fire cover 4.

[0104] Specifically, in this embodiment, if Figure 3 As shown, the widths of the first air distribution port 51 and the second air distribution port 52 are the same, and are arranged completely along the circumferential direction X of the burner 100. Of course, in other embodiments, the widths of the first air distribution port 51 and the second air distribution port 52 may be different, for example, the width of the first air distribution port 51 is smaller than that of the second air distribution port 52, or the width of the second air distribution port 52 is smaller than that of the first air distribution port 51. In this case, part of the first air distribution port 51 and part of the second air distribution port 52 may be arranged along the circumferential direction X of the burner 100, so as to increase the space available for setting the secondary air channel 101 by arranging the air distribution ports in this circumferential manner, so that more secondary air can be delivered to the central area of ​​the burner 100, thereby increasing the firepower of the central area of ​​the burner 100 and thus improving the heating efficiency of the burner 100. At the same time, the gas resistance flowing through these air distribution ports can be reduced, the gas outlet is smoother, the gas combustion is more complete, and the thermal efficiency is higher.

[0105] Compare Figure 5 and Figure 6 It can be seen that in the present embodiment, from the perspective of gas flow uniformity, two first gas distribution ports 51 and second gas distribution ports 52 are arranged on the gas distribution plate 5, in a symmetrical arrangement, and the first gas distribution ports 51 and the second gas distribution ports 52 are both located within the same circular range, so as to achieve a larger arrangement space for the secondary air channel 101, reduce gas flow resistance, make gas outlet smoother, and achieve more complete gas combustion with higher thermal efficiency.

[0106] In addition, in this embodiment, the first gas mixing chamber 61 and the second gas mixing chamber 62 located on the base 6 are also arranged along the circumferential direction X, and the second gas mixing chamber 62 is closer to the center of the base 6. Through this special-shaped layout scheme, the space utilization rate of the first gas mixing chamber 61 and the second gas mixing chamber 62 in the base 6 is higher, and a compact layout is achieved. At the same time, in response to the scheme that the connected first gas distribution port 51 and the second gas distribution port 52 are arranged within the same circumference, the structure of the first gas mixing chamber 61 conveying gas to the first gas distribution port 51 and the structure of the second gas mixing chamber 62 conveying gas to the second gas distribution port 52 do not affect each other, such as Figure 6 As shown in the left side position of the burner 100, the first gas mixing chamber 61 and the second gas mixing chamber 62 of the base 6 are partially overlapped in the vertical direction.

[0107] In this embodiment, a preferred structural arrangement is specifically provided in which at least parts of the first gas mixing chamber 61 and the second gas mixing chamber 62 are arranged to overlap in the vertical direction: Figure 7 As shown, for the second gas mixing chamber 62 of the base 6 in this embodiment, along the gas flow direction (i.e. Figure 7 At the end of the second mixing chamber 62, there is an extension channel 63, which is used to directly communicate with the second gas distribution port 52, and the extension channel 63 is formed at the upper position of the first mixing chamber 61, so that at the position where the extension channel 63 is set, the first mixing chamber 61 and the second mixing chamber 62 are overlapped in the vertical direction. This structural setting scheme is particularly suitable for the situation where there are multiple first gas distribution ports 51 and second gas distribution ports 52, and the first gas distribution ports 51 and the second gas distribution ports 52 are staggered. Of course, the above-mentioned scheme of setting the extension channel 63 at the end of the mixing chamber is only one of the solutions to solve the problem of gas channel distribution when multiple first gas distribution ports 51 and second gas distribution ports 52 are staggered, and is particularly suitable for the situation where the gas is transported to the mixing chamber through a single ejector pipe as in the present embodiment, but needs to be diverted to more than two gas distribution ports after flowing through the mixing chamber.

[0108] In other embodiments, especially when multiple ejector tubes are provided to simultaneously deliver gas to a gas mixing chamber, the gas mixing chamber itself can divert the gas to more than two gas diversion ports by means of a split arrangement, so there is no need to provide an extension channel for diversion.

[0109] For example, in the present embodiment, there are two first gas distribution ports 51 and second gas distribution ports 52 at the same time, and the first gas distribution ports 51 and the second gas distribution ports 52 are staggered. By setting an extension channel 63 at the end of the second gas mixing chamber 62 along the gas flow direction, the extension channel 63 extends to the top of the first gas mixing chamber 61 and is connected with the second gas distribution port 52. The gas in the first gas mixing chamber 61 flows below the extension channel 63 and is correspondingly transported to the first gas distribution port 51, so that the structural arrangement of the first gas mixing chamber 61 and the second gas mixing chamber 62 is simpler.

[0110] If a corresponding fire cover is set for each combustion part as in the prior art, and a plurality of fire covers are concentrically nested, the relative positions of the various flow channels of the burner will be complicated, resulting in a longer gas delivery path and higher pressure loss along the way. In addition, the cross-sectional perimeter of the flow channel extending from the base to the gas mixing chamber is too large, thus affecting the smoothness of the gas flow, and ultimately affecting the combustion efficiency and load.

[0111] Therefore, this structural arrangement can also reduce the volume of the burner 100 in the height direction and the width direction where the first gas mixing chamber 61 and the second gas mixing chamber 62 are arranged, which is convenient for the arrangement design and the fixed installation of the burner 100 .

[0112] Specific as Figure 8 As shown, after the gas enters the base 6 along direction a through the middle ring ejector tube 72, the gas is split by the structure of the first gas mixing chamber 61 in the base 6 and flows to the two first gas distribution ports 51 along directions a1 and a2, respectively, wherein the gas in direction a2 flows under the extension channel 63. At the same time, after the gas enters the base 6 along direction b through the outer ring ejector tube 73, the gas is split by the structure of the second gas mixing chamber 62 in the base 6 and flows to the two second gas distribution ports 52 along directions b1 and b2, respectively, wherein the gas in direction b1 flows to the corresponding second gas distribution ports 52 through the extension channel 63.

[0113] In addition, in the present embodiment, an extension channel 63 is provided at the end of the second mixing chamber 62, so that the end of the second mixing chamber 62 is stacked above the first mixing chamber 61, and the relationship between the gas loads of the middle ring combustion section 2 and the outer ring combustion section 3 is also taken into consideration. Specifically, in the present embodiment, the gas load of the middle ring combustion section 2 is greater than that of the outer ring combustion section 3. Therefore, an extension channel 63 is provided at the end of the second mixing chamber 62 corresponding to the outer ring combustion section 3, so that the second mixing chamber 62 is partially stacked above the first mixing chamber 61, so that the length of the gas flow channel of the first mixing chamber 61 is longer than that of the second mixing chamber 62. Since the volume of the gas flow channel is also positively correlated with the gas load, relatively increasing the length of the gas flow channel of the first mixing chamber 61 can better adapt to the larger gas load of the middle ring combustion section 2.

[0114] At the same time, if Figure 6 As shown, in the process of gas flowing from the second gas distribution port 52 to the second gas mixing chamber 31, in order to change the gas flow direction and guide the gas to flow in the correct direction, a baffle 55 (equivalent to the second gas guide portion) is provided on the annular partition between the first gas mixing chamber 21 and the second gas mixing chamber 31. The baffle 55 is specifically arranged in an inclined direction to guide the gas to change direction when flowing out of the second gas distribution port 52 and flow obliquely outward to the second gas mixing chamber 31. Of course, in other embodiments, the baffle 55 can also be provided for the first gas distribution port 51 and the first gas mixing chamber 21 to guide the gas flowing out of the first gas distribution port 51 to change direction and flow in the direction of the first gas mixing chamber 21.

[0115] like Fig. 9 and Fig.10 As shown, in the present embodiment, the gas distribution plate 5 is composed of a first gas distribution part 53 and a second gas distribution part 54, and the first gas distribution part 53 and the second gas distribution part 54 are stacked in a direction from bottom to top. Among them, the first gas distribution part 53 is located on the lower side and docked with the base 6, so along the gas flow direction, the front section of the first gas distribution port 51 and the front section of the second gas distribution port 52 are both formed on the first gas distribution part 53. The second gas distribution part 54 is located on the upper side and docked with the outer fire cover 4, so along the gas flow direction, the rear section of the first gas distribution port 51 and the rear section of the second gas distribution port 52 are both formed on the second gas distribution part 54. The gas distribution plate 5 is formed by a relative combination of the first gas distribution part 53 and the second gas distribution part 54, and the gas distribution plate 5 is formed by a part arrangement and mutual combination, so as to achieve the purpose of simplifying the structure of the burner 100.

[0116] At the same time, since the range of the secondary air channel 101 in this embodiment is defined by the air distributor plate 5, specifically formed between the first air distributor portion 53 and the second air distributor portion 54, the first air distributor portion 53 and the second air distributor portion 54 are processed in a component-by-component manner and then combined, so that a relatively complex structure can be realized by component-by-component processing and combination.

[0117] like Fig. 9As shown, the secondary air passage 101 is located between the first air distribution port 51 and the second air distribution port 52. Specifically, in this embodiment, there are two first air distribution ports 51 and the second air distribution ports 52, one of which is arranged adjacent to the second air distribution port 51 and the second air distribution port 52, and the other is arranged adjacent to the second air distribution port 51 and the second air distribution port 52, so as to form a larger space between the two groups of first air distribution ports 51 and the second air distribution ports 52 for setting the secondary air passage 101, improving the ability to transport secondary air to the inside of the burner 100, so as to provide the burner 100 with sufficient combustion. Of course, in other embodiments, other layout methods can also be used to arrange the secondary air passage 101 between the first air distribution part 53 and the second air distribution part 54, and the specific arrangement position can be selected as needed.

[0118] In addition, in this embodiment, a first gas distribution port 51 and a second gas distribution port 52 are arranged relatively close to each other, which also takes into account the improvement of gas sealing. Specifically, the first gas distribution port 51 and the second gas distribution port 52 are arranged adjacent to each other, and the layout of the two is relatively compact, so that the length of the sealing ring required for the burner 100 to perform overall sealing on the first gas distribution port 51 and the second gas distribution port 52 is relatively smaller, thereby reducing the risk of gas leakage by reducing the length of the sealing ring.

[0119] In this embodiment, a three-channel three-ring fire burner is taken as an example, and by adjusting the structure of the gas channel of the middle ring combustion part 2 and the outer ring combustion part 3 of the burner 100, the purpose of increasing the secondary air supplement amount, ensuring the smoothness of the gas flow, and improving the heat load of the burner 100 is achieved. In other embodiments, the structural improvement of the combustion part can also be applied to the inner ring combustion part 1 and the middle ring combustion part 2 of the three-channel three-ring fire burner, and even to the inner ring combustion part 1 and the outer ring combustion part 3. At the same time, in other embodiments, this structural improvement of the combustion part can also be applied to multi-ring fire burners of other specifications, such as a four-ring fire burner, or a five-ring fire burner.

[0120] Example 2

[0121] This embodiment provides a burner, and its structure is substantially the same as that of the burner provided in Embodiment 1, and the difference mainly lies in the layout position difference of the first gas distribution port 51 and the second gas distribution port 52 .

[0122] Specific as Fig.11As shown, in this embodiment, the widths of the first air splitting port 51 and the second air splitting port 52 are not consistent, and the width of the second air splitting port 52 is slightly wider than that of the first air splitting port 51, resulting in that when the first air splitting port 51 and the second air splitting port 52 are aligned at one section (outside the circular ring), the other end (inside the circular ring) of the second air splitting port 52 slightly protrudes from the first air splitting port 51. In this case, the portion of the second air splitting port 52 protruding from the first air splitting port 51 extends toward the first air splitting port 51 along the circumferential direction X of the burner, and is arranged adjacent to the first air splitting port 51 along the radial direction Y of the burner. By extending the protruding portion of the relatively protruding second air splitting port 52 toward the first air splitting port 51, the arrangement between the two air splitting ports is made more compact, thereby saving the space occupied by the air splitting ports.

[0123] Example 3

[0124] This embodiment provides a burner, and its structure is substantially the same as that of the burner provided in Embodiment 1, and the difference mainly lies in the layout position difference of the first gas distribution port 51 and the second gas distribution port 52 .

[0125] Specific as Fig.12 As shown, in the present embodiment, the number of the first air distribution ports 51 and the second air distribution ports 52 is also two, but what is different from the first embodiment is that the first air distribution ports 51 and the second air distribution ports 52 are not arranged close to each other, but are arranged at intervals from each other. In this case, four gaps are formed between the two first air distribution ports 51 and the two second air distribution ports 52, and these four gap areas can all be used to set the secondary air passage 101.

[0126] In addition, in this embodiment, even if the first gas distribution port 51 and the second gas distribution port 52 are not close to each other, the first gas distribution port 51 and the second gas distribution port 52 are arranged alternately according to the rule of the first gas distribution port 51, the second gas distribution port 52, the first gas distribution port 51, and the second gas distribution port 52. This scheme of alternately arranging the gas distribution ports can improve the uniformity of the gas supply, and avoid the situation where the multiple gas distribution ports corresponding to a certain combustion part are arranged too concentratedly, resulting in uneven distribution of the gas in the combustion part, thereby affecting the heating uniformity.

[0127] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A burner comprising a multi-ring combustion section, characterized in that: The multi-ring combustion section comprises a first combustion section and a second combustion section arranged in sequence along the radial direction of the burner, the first combustion section is connected to the gas source through a first gas distribution port, the second combustion section is connected to the gas source through a second gas distribution port, and at least part of the first gas distribution port and the second gas distribution port are arranged along the circumferential direction of the burner; The number of the first air distribution ports is at least two, and along the circumferential direction of the burner, the second air distribution port is located between the two first air distribution ports.

2. The burner according to claim 1, characterized in that The first combustion part further includes a first gas mixing chamber, the second combustion part further includes a second gas mixing chamber, the first gas distribution port is connected to the gas source through the first gas mixing chamber, and the second gas distribution port is connected to the gas source through the second gas mixing chamber; At least parts of the first gas mixing chamber and the second gas mixing chamber are overlapped in the vertical direction.

3. The burner according to claim 2, characterized in that An extension channel is provided at the end of the second gas mixing chamber along the gas flow direction. The extension channel is used to be directly connected to the second gas distribution port. The extension channel is formed above the first gas mixing chamber.

4. The burner according to claim 3, characterized in that The burner further includes a base, the first gas mixing chamber and the second gas mixing chamber are both formed in the base, the first gas mixing chamber and the second gas mixing chamber are separated by a partition, and the extension channel is integrally formed on the partition; And / or, the gas load of the first combustion section is greater than that of the second combustion section.

5. The burner according to claim 2, characterized in that The burner further comprises a base and a gas distribution plate, the first gas distribution port and the second gas distribution port are both formed on the gas distribution plate, and the base and the gas distribution plate are stacked from bottom to top; The first gas mixing chamber is surrounded by the base and the gas distribution plate; and / or, The second gas mixing chamber is surrounded by the base and the gas distribution plate.

6. The burner according to claim 5, characterized in that The burner further comprises a fire cover, which is arranged above the gas distribution plate; Along the axial direction of the burner, the secondary air passage of the burner is formed between the base and the fire cover; and / or, Along the circumferential direction of the burner, the secondary air passage is disposed at two of the first air distribution ports, or two of the second air distribution ports, or between the first air distribution port and the second air distribution port.

7. The burner according to claim 1, characterized in that The first gas mixing chamber of the first combustion part is connected to the gas source through the first gas distribution port, and the second gas mixing chamber of the second combustion part is connected to the gas source through the second gas distribution port. The burner also includes a gas distribution plate and a fire cover. The first gas distribution port and the second gas distribution port are both formed on the gas distribution plate. The gas distribution plate and the fire cover are stacked from bottom to top. The first gas mixing chamber is surrounded by the gas distribution plate and the fire cover; and / or, The second gas mixing chamber is surrounded by the gas distribution plate and the fire cover.

8. The burner according to claim 7, characterized in that The gas distribution plate further comprises a first gas guide portion, the first gas guide portion is formed above the first gas distribution port, and the first gas guide portion is used to guide the gas flowing out of the first gas distribution port toward the first gas mixing chamber; and / or, The gas distribution plate also has a second gas guide portion, which is formed above the second gas distribution port and is used to guide the gas flowing out of the second gas distribution port toward the second gas mixing chamber.

9. The burner according to claim 8, characterized in that The first gas mixing chamber and the second gas mixing chamber are separated by an annular partition of the gas distribution plate, and the first gas guide portion and / or the second gas guide portion are integrally formed on the annular partition.

10. The burner according to claim 1, characterized in that The first gas mixing chamber of the first combustion part is connected to the gas source through the first gas distribution port, and the second gas mixing chamber of the second combustion part is connected to the gas source through the second gas distribution port. The first gas mixing chamber and the second gas mixing chamber of the burner are arranged adjacent to each other.

11. The burner according to claim 10, characterized in that The first gas mixing chamber and the second gas mixing chamber of the burner are formed on the same fire cover; And / or, the burner is a three-channel three-ring fire burner, the first combustion section of the burner is an outer ring combustion section, and the second combustion section of the burner is a middle ring combustion section.

12. The burner according to claim 10, characterized in that The burner comprises a gas distribution plate, the first gas distribution port and the second gas distribution port are both formed on the gas distribution plate, the gas distribution plate comprises a first gas distribution part and a second gas distribution part, the first gas distribution part and the second gas distribution part are stacked in a direction from bottom to top; Along the gas flow direction, the front section of the first gas distribution port is formed on the first gas distribution portion, and the rear section of the first gas distribution port is formed on the second gas distribution portion; and / or, Along the gas flow direction, the front section of the second gas distribution port is formed on the first gas distribution portion, and the rear section of the second gas distribution port is formed on the second gas distribution portion.

13. The burner according to claim 12, characterized in that Along the axial direction of the burner, the secondary air passage of the burner is formed between the first air distributor and the second air distributor; Along the circumferential direction of the burner, the secondary air passage is located between the first air distribution port and the second air distribution port.

14. A burner as claimed in any one of claims 1 to 13, characterized in that In the radial direction of the burner, at least a portion of the second air distribution port protrudes from the first air distribution port, the portion of the second air distribution port protruding from the first air distribution port extends toward the first air distribution port along the circumferential direction of the burner, and is arranged adjacent to the first air distribution port along the radial direction of the burner; And / or, the first gas distribution port and the second gas distribution port are arranged adjacent to each other.

15. The burner according to any one of claims 1 to 13, characterized in that The plurality of first gas distribution ports are evenly arranged around the central axis of the burner; And / or, there are multiple second gas distribution ports, and the multiple second gas distribution ports are evenly arranged on a circle with the central axis of the burner as the center.

16. A gas cooker, characterized in that: The gas cooker comprises a burner as claimed in any one of claims 1 to 15.

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