Gas distribution plate and burner

Abstract

The present invention discloses a gas distribution plate and a burner including the same, wherein the gas distribution plate comprises an upper cover and a lower cover, wherein the upper part of the upper cover is formed with an inner ring upper channel and a plurality of outer ring upper channels surrounding the inner ring upper channel, wherein the outer ring upper channel has an inner ring channel and an outer ring channel; the lower part of the lower cover is formed with an inner ring lower channel and a plurality of outer ring lower channels surrounding the inner ring lower channel, wherein the inner ring lower channel is connected to the inner ring upper channel; an air distribution cavity is formed between the upper cover and the lower cover, wherein the inner ring channel and the outer ring channel in the same outer ring upper channel are connected to different outer ring lower channels through different air distribution cavities, and the outer ring lower channel is connected to at least two outer ring upper channels through different air distribution cavities. The gas distribution plate of the present invention increases the diversity of fire by improving the gas distribution structure.

Description

Technical Field

[0001] The invention relates to the field of kitchen appliances, and in particular to a gas distribution plate and a burner comprising the same. Background Art

[0002] The burner in the existing gas stove usually includes a fire cover, a gas distribution plate and a burner head, wherein the gas distribution plate is installed on the burner head, and the fire cover is installed on the gas distribution plate. The gas distribution plate rectifies the multi-path gas from the burner head into multiple gas rings, each gas ring corresponds to a fire cover, and an air supplement channel is defined between adjacent gas rings.

[0003] Since different fire-generating methods are required according to different cooking needs during the cooking process, in order to increase the diversity of fire-generating methods, an existing solution is to set a ring of fire-generating holes on the inner and outer sides of the fire cover, thereby forming two rings of fire on one fire cover. However, the two rings of fire on the same fire cover are supplied by the same gas ring. When the two rings of fire are close to each other and the air intake cannot be adjusted separately, the diversity of fire-generating methods is slightly affected. Therefore, the existing solution still cannot effectively increase the diversity of fire-generating methods. Summary of the invention

[0004] The object of the present invention is to provide an air distribution plate, which improves the diversity of fire output by improving the air distribution structure.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A gas distribution plate, comprising:

[0007] An upper cover, wherein an inner ring upper channel and a plurality of outer ring upper channels surrounding the inner ring upper channel are formed on the upper portion of the upper cover, wherein the outer ring upper channel has an inner ring channel and an outer ring channel;

[0008] A lower cover, wherein the lower portion of the lower cover is formed with an inner ring lower channel and a plurality of outer ring lower channels surrounding the inner ring lower channel, and the inner ring lower channel is connected to the inner ring upper channel;

[0009] An air dividing cavity is formed between the upper cover and the lower cover. The inner ring channel and the outer ring channel in the same outer ring upper channel are connected to different outer ring lower channels through different air dividing cavities respectively. The outer ring lower channel is connected to at least two outer ring upper channels through different air dividing cavities.

[0010] Further, the upper part of the upper cover is formed with two outer ring upper channels, the lower part of the lower cover is formed with two outer ring lower channels, and the air dividing cavity includes:

[0011] A first air dividing cavity, wherein the inner ring channel of the two outer ring upper channels is connected to one of the outer ring lower channels through the first air dividing cavity,

[0012] A second air dividing cavity, wherein the outer ring channel of the two outer ring upper channels is connected to the other outer ring lower channel through the second air dividing cavity.

[0013] Furthermore, a plurality of circumferentially distributed air dividing covers are formed on the upper portion of the lower cover, the first air dividing cavity and the second air dividing cavity are formed between the air dividing cover and the upper cover, the air dividing cover is formed with a lower dividing rib and / or the lower portion of the upper cover is formed with an upper dividing rib, and the lower dividing rib and / or the upper dividing rib separate the first air dividing cavity and the second air dividing cavity.

[0014] Furthermore, the gas distribution cover comprises:

[0015] The gas-dividing cover bottom extends from the inside to the outside;

[0016] A first gas separation cover side wall, formed on one side of the gas separation cover bottom;

[0017] The second gas separation cover side wall is formed on the other side of the gas separation cover bottom.

[0018] Furthermore, the circumferential spacing between the side walls of the first air dividing cover and the side walls of the second air dividing cover gradually increases from the inside to the outside.

[0019] Furthermore, a first outward expansion section is formed at the outer end of the side wall of the second air dividing cover, the first outward expansion section expands outward in a direction away from the side wall of the first air dividing cover, and the lower dividing rib extends to the first outward expansion section.

[0020] Furthermore, the lower dividing rib comprises:

[0021] The first straight line segment extends from the inside to the outside;

[0022] A first inner arc segment circumferentially extends from the first straight line segment to the first air distribution cover side wall;

[0023] The first outer arc segment circumferentially extends from the first straight line segment to the side wall of the second air distribution cover.

[0024] Furthermore, an air separation frame and the lower separation rib are formed at the lower portion of the upper cover, the air separation frame is adapted to be coupled with the air separation cover, and the lower separation rib is adapted to be coupled with the upper separation rib.

[0025] Furthermore, the upper cover is formed with an air supplement channel, and the air supplement channel is located between the inner ring upper channel and the outer ring upper channel and / or between any two of the outer ring upper channels.

[0026] Based on the structural design of the above-mentioned gas distribution plate, the present invention further provides a burner, which includes the above-mentioned gas distribution plate.

[0027] Compared with the prior art, the advantages and beneficial effects of the present invention are:

[0028] The gas distribution plate of the present invention utilizes different gas distribution cavities to connect the inner ring channel and the outer ring channel in the same outer ring upper channel with different outer ring lower channels respectively, so that the inner ring channel and the outer ring channel in the same outer ring upper channel can be supplied with gas separately by different gas circuits. Therefore, although the two air outlet rings defined by the inner ring channel and the outer ring channel in the same outer ring upper channel are close to each other, they can form two ring fires with different firepower or asynchronous firing through independent air intake. Therefore, the gas distribution plate of the present invention helps to improve the diversity of fire output.

[0029] The gas distribution plate of the present invention also uses different gas distribution cavities to connect the outer ring lower channel with at least two outer ring upper channels, so that the number of gas outlet rings of the upper cover can be increased without increasing the number of outer ring lower channels.

[0030] In addition, since the outer ring lower channel is not connected to the inner ring channel and the outer ring channel in the same outer ring upper channel, there is a certain distance between at least two ring fires formed by the air supply from the same outer ring lower channel, which is conducive to expanding the heating area and increasing the uniformity of heating.

[0031] Other features and advantages of the present invention will become more apparent after reading the detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 is an exploded schematic diagram of a gas distribution plate according to an embodiment of the present invention;

[0034] Figure 2 yes Figure 1 A cross-sectional view of the middle and lower cover;

[0035] Figure 3 yes Figure 1 Cross-sectional view of the center gas disc after assembly;

[0036] Figure 4 yes Figure 1 A top view of the middle and lower cover;

[0037] Figure 5 yes Figure 1 Bottom view of the middle and lower cover;

[0038] Figure 6 yes Figure 1Bottom view of the middle upper cover;

[0039] Figure 7 is a cross-sectional view of a burner according to an embodiment of the present invention;

[0040] Description of reference numerals:

[0041] Upper cover 1;

[0042] Inner ring channel 1-1;

[0043] First outer ring upper channel 1-2; first inner ring channel 1-2-1; first outer ring channel 1-2-2;

[0044] Second outer ring upper channel 1-3; second inner ring channel 1-3-1; second outer ring channel 1-3-2;

[0045] Air dividing frame 1-4; air dividing frame outer wall 1-4-1; first air dividing frame side wall 1-4-2; second air dividing frame side wall 1-4-3; second outer expansion section 1-4-3-1;

[0046] Upper dividing rib 1-5; second straight line segment 1-5-1; second inner arc segment 1-5-2; second outer arc segment 1-5-3;

[0047] First inner ring vent 1-6; first outer ring vent 1-7; second inner ring vent 1-8; second outer ring vent 1-9;

[0048] First air supply port 1-10; second air supply port 1-11;

[0049] Lower cover 2;

[0050] Inner ring lower channel 2-1;

[0051] First outer ring lower channel 2-2;

[0052] Second outer ring lower channel 2-3;

[0053] Air distribution cover 2-4; air distribution cover bottom 2-4-1; first outer ring lower vent 2-4-1-1; second outer ring lower vent 2-4-1-2; first air distribution cover side wall 2-4-2; second air distribution cover side wall 2-4-3; first outer expansion section 2-4-3-1;

[0054] Lower dividing rib 2-5; first straight line segment 2-5-1; first inner arc segment 2-5-2; first outer arc segment 2-5-3;

[0055] The first sub-cavity A;

[0056] The second air cavity B. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0058] It should be noted that in the description of the present invention, the terms "upper", "lower", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0059] See also Figures 1 to 6 As shown, the present invention provides an embodiment of a gas distribution plate, which can be applied to an existing burner, and includes an upper cover 1 and a lower cover 2. The upper cover 1 and the lower cover 2 can be sealed to prevent leakage of the gas flowing therethrough, and specifically, a threaded connection or a welding connection method can be adopted.

[0060] An inner ring upper channel 1-1 and a plurality of outer ring upper channels surrounding the inner ring upper channel 1-1 are formed at the upper part of the upper cover 1, and the plurality of outer ring upper channels are also surrounded in sequence from the inside to the outside, and each outer ring upper channel has two air outlet rings, which are an inner ring channel and an outer ring channel located outside the inner ring channel. An inner ring lower channel 2-1 and a plurality of outer ring lower channels surrounding the inner ring lower channel 2-1 are formed at the lower part of the lower cover 2, and the plurality of outer ring lower channels are also surrounded in sequence from the inside to the outside. When the upper cover 1 and the lower cover 2 are sealed and connected, the inner ring lower channel 2-1 is connected to the inner ring upper channel 1-1, and a plurality of air dividing cavities are defined between the upper cover 1 and the lower cover 2, wherein the inner ring channel and the outer ring channel in the same outer ring upper channel are connected to different outer ring lower channels through different air dividing cavities, and each outer ring lower channel is connected to at least two outer ring upper channels through different air dividing cavities.

[0061] In this embodiment, the upper channel of the upper cover 1 is connected to the lower channel of the lower cover 2 by using the air distribution cavity, and the independent air intake of the two air outlet rings in the same outer ring upper channel is realized, so that the two rings of fire corresponding to the two air outlet rings in the same outer ring upper channel can have different firepower. Therefore, the air distribution plate of this embodiment can effectively increase the diversity of fire through various air outlet methods, improve the flexibility of heating area changes, and adapt to the changing needs of heating area during cooking, which helps to improve user experience. In addition, in this embodiment, each outer ring lower channel is connected to at least two outer ring upper channels, so that the number of air outlet rings can be increased without increasing the number of outer ring lower channels, which is conducive to reducing the setting of external air circuits.

[0062] Specifically, in this embodiment, two outer ring channels coaxial with the inner ring channel 1-1 are formed on the upper part of the upper cover 1. For the convenience of explanation, the two outer ring channels are respectively: the first outer ring channel 1-2 and the second outer ring channel 1-3. The inner ring channel of the first outer ring channel 1-2 is the first inner ring channel 1-2-1, the outer ring channel of the first outer ring channel 1-2 is the first outer ring channel 1-2-2, the inner ring channel of the second outer ring channel 1-3 is the second inner ring channel 1-3-1, and the outer ring channel of the second outer ring channel 1-3 is the second outer ring channel 1-3-2, see Figure 1 Correspondingly, two outer ring lower channels coaxial with the inner ring lower channel 2-1 are formed at the lower part of the lower cover 2, and the two outer ring lower channels are respectively: a first outer ring lower channel 2-2 and a second outer ring lower channel 2-3, see Figure 5 In addition, the air dividing cavity formed between the upper cover 1 and the lower cover 2 includes a first air dividing cavity A and a second air dividing cavity B.

[0063] The upper part of the upper cover 1 is formed with a total of five air outlet rings, which can form a five-ring fire. The lower part of the lower cover 2 is formed with a total of three air inlet rings, which can be adapted to the burner head with three ejector tubes. The three air inlet rings can not only supply air to the five air outlet rings, but also realize cross-air supply. Figure 2 , Figure 3 As shown by the middle arrow, the gas flow direction, the first gas chamber A connects the first inner ring channel 1-2-1, the second inner ring channel 1-3-1 and the first outer ring lower channel 2-2, and can deliver the gas from the first outer ring lower channel 2-2 to the non-adjacent first inner ring channel 1-2-1 and the second inner ring channel 1-3-1, and the second gas chamber B connects the first outer ring channel 1-2-2, the second outer ring channel 1-3-2 and the second outer ring lower channel 2-3, and can deliver the gas from the second outer ring lower channel 2-3 to the non-adjacent first outer ring channel 1-2-2 and the second outer ring channel 1-3-2.

[0064] In order to make the gas in the channels on the two outer rings more evenly distributed, in some embodiments of the present invention, a plurality of circumferentially distributed gas distribution covers 2-4 may be formed in the lower part of the lower cover 2, and each gas distribution cover 2-4 cooperates with the upper cover 1 to form an air cavity, and each air cavity is divided into a first sub-cavity A and a second sub-cavity B that are independent of each other. The circumferentially distributed first sub-cavity A and the second sub-cavity B can make the gas in the corresponding channels above them more evenly distributed, which is conducive to stable and efficient combustion of the flame.

[0065] In some embodiments, a lower dividing rib 2-5 may be formed on the air dividing cover 2-4, and the air cavity may be divided into two by the lower dividing rib 2-5 to form a first dividing air cavity A and a second dividing air cavity B that are independent of each other.

[0066] In some embodiments, an upper dividing rib 1-5 may be formed at the lower portion of the upper cover 1, and the air cavity may be divided into two by the upper dividing rib 1-5 to form a first sub-cavity A and a second sub-cavity B that are independent of each other.

[0067] In some embodiments, a lower dividing rib 2-5 may be formed on the air dividing cover 2-4, and an upper dividing rib 1-5 may be formed at the lower portion of the upper cover 1. The upper dividing rib 1-5 and the lower dividing rib 2-5 are connected to each other, and the air cavity is divided into two by the upper dividing rib 1-5 and the lower dividing rib 2-5, forming a first dividing air cavity A and a second dividing air cavity B that are independent of each other.

[0068] Specifically, in this embodiment, four air dividing covers 2 - 4 are formed on the upper part of the lower cover 2 , and a lower dividing rib 2 - 5 for dividing the air dividing cover 2 - 4 is formed on each of the air dividing covers 2 - 4 . The air dividing cover 2-4 includes an air dividing cover bottom 2-4-1, a first air dividing cover side wall 2-4-2 and a second air dividing cover side wall 2-4-3. The air dividing cover bottom 2-4-1 extends from the inside to the outside. The first air dividing cover side wall 2-4-2 and the second air dividing cover side wall 2-4-3 are located on both sides of the extension direction of the air dividing cover bottom 2-4-1. A first outer ring lower air vent 2-4-1-1 and a second outer ring lower air vent 2-4-1-2 are formed on the air dividing cover bottom 2-4-1. The first outer ring lower air vent 2-4-1-1 connects the first outer ring lower channel 2-2 with the first air dividing cavity A, and the second outer ring lower air vent 2-4-1-2 connects the second outer ring lower channel 2-3 with the second air dividing cavity B.

[0069] See also Figure 4 As shown, the first outer ring lower air vent 2-4-1-1 and the second outer ring lower air vent 2-4-1-2 are located at the inner end of the gas separation cover bottom 2-4-1 and are separated by the lower dividing rib 2-5, and the gas in the first gas separation cavity A and the second gas separation cavity B flows obliquely upward from the inside to the outside. In order to reduce the resistance to the inflow of gas and facilitate the injection of gas from below, the circumferential spacing between the first gas separation cover side wall 2-4-2 and the second gas separation cover side wall 2-4-3 gradually increases from the inside to the outside, which can reduce the resistance to the air flow entering the air cavity and make the air flow in the air cavity more uniform. The gas separation cover bottom 2-4-1 of this embodiment extends obliquely upward from the inside to the outside, and the gas separation cover bottom 2-4-1 is a curved plate. The upper surface of the gas separation cover bottom 2-4-1 is a concave surface, which can adapt to the gas flow direction and guide the gas to flow upward. The lower surface of the gas separation cover bottom 2-4-1 is a convex surface, which can be conducive to the upward replenishment of the external surrounding air.

[0070] In this embodiment, the lower dividing rib 2-5 is formed on the gas dividing cover bottom 2-4-1, which includes a first inner arc segment 2-5-2, a first straight line segment 2-5-1 and a first outer arc segment 2-5-3 connected in sequence, see Figure 4As shown, the first straight line segment 2-5-1 extends from the inside to the outside, the first inner arc segment 2-5-2 and the first outer arc segment 2-5-3 are arc-shaped, the first inner arc segment 2-5-2 extends circumferentially from the first straight line segment 2-5-1 to the first air dividing cover side wall 2-4-2, and the first outer arc segment 2-5-3 extends circumferentially from the first straight line segment 2-5-1 to the second air dividing cover side wall 2-4-3, wherein the first inner arc segment 2-5-2 is located above the middle of the first outer ring lower channel 2-2 and the second outer ring lower channel 2-3, the first outer ring lower air vent 2-4-1-1 and the second outer ring lower air vent 2-4-1-2 are respectively located on the opposite sides of the first inner arc segment 2-5-2, and the first outer arc segment 2-5-3 is located below the middle of the second inner ring channel 1-3-1 and the second outer ring channel 1-3-2.

[0071] See also Figure 6 As shown, in order to facilitate positioning and docking, in this embodiment, an air dividing frame 1-4 adapted to be docked with the air dividing cover 2-4 and an upper dividing rib 1-5 adapted to be docked with the lower dividing rib 2-5 are formed at the lower part of the upper cover 1. The air dividing frame 1-4 extends downward. When the air dividing frame 1-4 is docked with the air dividing cover 2-4, it can help the installer visually and tactilely confirm whether the upper cover 1 and the lower cover 2 are accurately connected. In this embodiment, the air dividing frame 1-4 is flush with the upper dividing rib 1-5, and the air dividing cover 2-4 is flush with the lower dividing rib 2-5. A gasket can be set between the upper cover 1 and the lower cover 2 to increase the sealing effect of the end surface.

[0072] The air dividing frame 1-4 includes an air dividing frame outer wall 1-4-1, a first air dividing frame side wall 1-4-2 and a second air dividing frame side wall 1-4-3, wherein the air dividing frame outer wall 1-4-1 is correspondingly connected to the outer end of the air dividing cover bottom 2-4-1, the first air dividing frame side wall 1-4-2 is correspondingly connected to the first air dividing cover side wall 2-4-2 by screws, and the second air dividing frame side wall 1-4-3 is correspondingly connected to the second air dividing cover side wall 2-4-3 by screws.

[0073] The upper dividing rib 1-5 includes a second inner arc segment 1-5-2, a second straight segment 1-5-1 and a second outer arc segment 1-5-3 which are connected in sequence; wherein the second inner arc segment 1-5-2 is connected to the first inner arc segment 2-5-2 correspondingly, the second straight segment 1-5-1 is connected to the first straight segment 2-5-1 correspondingly, the second outer arc segment 1-5-3 is connected to the first outer arc segment 2-5-3 correspondingly, the second inner arc segment 1-5-2 extends circumferentially to the first air dividing frame side wall 1-4-2, and the second outer arc segment 1-5-3 extends circumferentially to the second air dividing frame side wall 1-4-3.

[0074] Obviously, in order to achieve the corresponding communication between the upper channel and the air chamber, see Figure 6As shown, the upper cover 1 is provided with a first inner ring vent 1-6, a first outer ring vent 1-7, a second inner ring vent 1-8, and a second outer ring vent 1-9 located in the air dividing frame 1-4. The first inner ring vent 1-6 connects the first air dividing cavity A with the first inner ring channel 1-2-1, the second inner ring vent 1-8 connects the first air dividing cavity A with the second inner ring channel 1-3-1, the first outer ring vent 1-7 connects the second air dividing cavity B with the first outer ring channel 1-2-2, and the second outer ring vent 1-9 connects the second air dividing cavity B with the second outer ring channel 1-3-2.

[0075] In order to increase the size of the vent and speed up the passage of gas, the first inner ring vent 1-6 extends circumferentially from the second straight line segment 1-5-1 to the second air dividing frame side wall 1-4-3, the second inner ring vent 1-8 extends circumferentially from the second straight line segment 1-5-1 to the second air dividing frame side wall 1-4-3, the first outer ring vent 1-7 extends circumferentially from the second straight line segment 2-5-1 to the first air dividing frame side wall 1-4-2, and the second outer ring vent 1-9 extends circumferentially from the second air dividing frame side wall 1-4-3 to the first air dividing frame side wall 1-4-2.

[0076] In addition, the second air distribution cover side wall 2-4-3 of the present embodiment is formed with a first expansion section 2-4-3-1 expanding outward in a direction away from the first air distribution cover side wall 2-4-2, and correspondingly, a second expansion section 1-4-3-1 expanding outward in a direction away from the first air distribution frame side wall 1-4-2 is formed on the second air distribution frame side wall 1-4-3. The first expansion section 2-4-3-1 and the second expansion section 1-4-3-1 are both located below the second inner ring channel 1-3-1 and the second outer ring channel 1-3-2, the first outer arc section 2-5-3 extends to the middle of the first expansion section 2-4-3-1, and the second outer arc section 1-5-3 extends to the middle of the second expansion section 1-4-3-1. The first expansion section 2-4-3-1 and the second expansion section 1-4-3-1 not only enlarge the first gas distribution cavity A and the second gas distribution cavity B, but also extend the second inner ring vent 1-8 and the second outer ring vent 1-9, which is beneficial to reduce the resistance of the gas channel and increase the uniformity of gas distribution.

[0077] In order to supplement air and improve combustion efficiency, the upper cover 1 of this embodiment is formed with an air supplement channel. Specifically, an air supplement channel is formed between the inner ring upper channel 1-1 and the first outer ring upper channel 1-2 and between the first outer ring upper channel 1-2 and the second outer ring upper channel 1-3. Figure 6As shown, the air replenishment channel located between the inner ring upper channel 1-1 and the first outer ring upper channel 1-2 has a plurality of first air replenishment ports 1-10 distributed circumferentially, and the air replenishment channel located between the first outer ring upper channel 1-2 and the second outer ring upper channel 1-3 has a plurality of second air replenishment ports 1-11 distributed circumferentially, and the first air replenishment ports 1-10 and the second air replenishment ports 1-11 both extend circumferentially from a first air dividing frame side wall 1-4-2 of one air dividing frame 1-4 to a second air dividing frame side wall 1-4-3 of another air dividing frame 1-4.

[0078] Based on the structural design of the gas distribution plate, the present invention also provides an embodiment of a burner, see Figure 7 As shown, the burner includes the gas distribution plate in the above embodiment, and the installation scheme of the gas distribution plate can refer to the prior art.

[0079] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gas distribution plate, characterized in that: include: An upper cover, wherein an inner ring upper channel and a plurality of outer ring upper channels surrounding the inner ring upper channel are formed on the upper portion of the upper cover, wherein the outer ring upper channel has an inner ring channel and an outer ring channel; A lower cover, wherein the lower portion of the lower cover is formed with an inner ring lower channel and a plurality of outer ring lower channels surrounding the inner ring lower channel, and the inner ring lower channel is connected to the inner ring upper channel; An air dividing cavity is formed between the upper cover and the lower cover. The inner ring channel and the outer ring channel in the same outer ring upper channel are connected to different outer ring lower channels through different air dividing cavities respectively. The outer ring lower channel is connected to at least two outer ring upper channels through different air dividing cavities.

2. The gas distribution plate according to claim 1, characterized in that: The upper part of the upper cover is formed with two outer ring upper channels, the lower part of the lower cover is formed with two outer ring lower channels, and the air dividing cavity includes: A first air dividing cavity, wherein the inner ring channel of the two outer ring upper channels is connected to one of the outer ring lower channels through the first air dividing cavity, A second air dividing cavity, wherein the outer ring channel of the two outer ring upper channels is connected to the other outer ring lower channel through the second air dividing cavity.

3. The gas distribution plate according to claim 2, characterized in that: The upper part of the lower cover is formed with a plurality of circumferentially distributed air dividing covers, the first air dividing cavity and the second air dividing cavity are formed between the air dividing cover and the upper cover, the air dividing cover is formed with a lower dividing rib and / or the lower part of the upper cover is formed with an upper dividing rib, the lower dividing rib and / or the upper dividing rib separate the first air dividing cavity and the second air dividing cavity.

4. The gas distribution plate according to claim 3, characterized in that: The gas distribution cover comprises: The gas-dividing cover bottom extends from the inside to the outside; A first gas separation cover side wall, formed on one side of the gas separation cover bottom; The second gas separation cover side wall is formed on the other side of the gas separation cover bottom.

5. The gas distribution plate according to claim 4, characterized in that: The circumferential spacing between the first air dividing cover side wall and the second air dividing cover side wall gradually increases from the inside to the outside.

6. The gas distribution plate according to claim 4, characterized in that: A first outward expansion section is formed at the outer end of the side wall of the second air distribution cover. The first outward expansion section expands outward in a direction away from the side wall of the first air distribution cover. The lower dividing rib extends to the first outward expansion section.

7. The gas distribution plate according to claim 4, characterized in that: The lower dividing rib comprises: The first straight line segment extends from the inside to the outside; A first inner arc segment circumferentially extends from the first straight line segment to the first air distribution cover side wall; The first outer arc segment circumferentially extends from the first straight line segment to the side wall of the second air distribution cover.

8. The gas distribution plate according to claim 7, characterized in that: An air dividing frame and the lower dividing rib are formed at the lower part of the upper cover. The air dividing frame is adapted to be coupled with the air dividing cover, and the lower dividing rib is adapted to be coupled with the upper dividing rib.

9. The gas distributor according to any one of claims 1 to 8, characterized in that: The upper cover is formed with an air supplement channel, and the air supplement channel is located between the inner ring upper channel and the outer ring upper channel and / or between any two outer ring upper channels.

10. A burner, characterized in that: The invention comprises the gas distributor according to any one of claims 1 to 9.

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