Gas burner and gas burner device

Abstract

Discloses are a burner and a gas device. The burner includes an inner shell and an outer shell. The inner shell has a first flame port and a gap portion isolated from each other at the top. The outer shell is provided on the outer side of the inner shell, and forms a second flame port at the top with the inner shell, and the second flame port is located on the outer side of the gap portion away from the first flame port. One of the first flame port and the second flame port is a lean flame port, and the other of the first flame port and the second flame port is a rich flame port. The outer side wall of the inner shell forming the gap portion is provided with a first air guide port, for guiding airflow in the second flame port into the gap portion.

Description

TECHNICAL FIELD

[0001] The present invention relates to the technical field of gas devices, and in particular to a burner and a gas device.BACKGROUND

[0002] Burners are key components in gas devices such as gas water heaters. In order to control harmful gas emissions during gas combustion, rich-lean burners that can achieve rich-lean combustion are increasingly widely used in gas devices.

[0003] The basic principle of rich-lean combustion is to make part of the gas burn under insufficient air conditions, that is, the gas burns too "rich", and the other part of the gas burns under excessive air conditions, that is, the gas burns too "lean".

[0004] In the related art, in order to prevent interference between the rich flame and the lean flame and to ensure the effectiveness of rich-lean combustion, a gap is provided between the rich fire port and the lean fire port of the burner. The excess air on the lean flame side will flow to the top of the gap, and the mixed gas on the rich flame side will also flow to the top of the gap and burn at a position above the gap. However, the combustion above the gap is prone to oscillating combustion, causing combustion noise.SUMMARY

[0005] The main purpose of the present invention is to propose a burner, which aims to reduce combustion vibration noise.

[0006] To achieve the above purpose, the present invention proposes a burner, comprising: an inner shell, the inner shell is provided with a first flame port and a gap portion at a top of the inner shell, and the first flame port is isolated from the gap portion; and an outer shell, the outer shell is provided on an outer side of the inner shell and forms a second flame port with the inner shell at a top. The second flame port is located on an outer side of the gap portion away from the first flame port, one of the first flame port and the second flame port is a lean flame port, and the other one of the first flame port and the second flame port is a rich flame port.

[0007] A first air guide port is provided on an outer side wall of the gap portion formed by the inner shell, for guiding airflow in the second flame port into the gap portion.

[0008] In an embodiment of the present invention, the first flame port is the lean flame port, and the second flame port is the rich flame port.

[0009] In an embodiment of the present invention, the inner shell comprises two first side plates opposite to each other, a first flow channel and an opening at a top is formed between the two first side plates, and the second flame port is formed between the first side plate and the outer shell.

[0010] A rectifying component is provided between the two first side plates, and the rectifying component separates the opening into the first flame port and the gap portion. The first flame port is formed in the rectifying component and is communicated with the first flow channel. The gap portion is formed between the rectifying component and the first side plate and is separated from the first flow channel.

[0011] The first side plate separates the gap portion from the second flame port, and the first air guide port is provided in the first side plate.

[0012] In an embodiment of the present invention, the first air guide port is a through hole penetrating through both sides of the first side plate.

[0013] In an embodiment of the present invention, a distance between the first air guide port and a top surface of the first side plate in a height direction is defined as L1, and a width of the gap portion is L2. L1 is greater than or equal to L2.

[0014] In an embodiment of the present invention, the first air guide port is a notch provided at a top end of the first side plate.

[0015] In an embodiment of the present invention, a plurality of the first air guide ports are provided, and the plurality of the first air guide ports are provided at an interval in a length direction of the gap portion.

[0016] In an embodiment of the present invention, the rectifying component comprises a plurality of rectifying plates spaced apart in a width direction, and the plurality of rectifying plates divide the first flame port in the width direction.

[0017] The rectifying component is provided with a plurality of press portions in a length direction, and the plurality of press portions are abutted against upper portions of the plurality of rectifying plates to divide the first flame port in the length direction.

[0018] The gap portion is formed between the rectifying plate on an outermost side and a corresponding first side plate.

[0019] In an embodiment of the present invention, the rectifying plate on the outermost side is provided with a second air guide port for guiding airflow of the first flame port into the gap portion.

[0020] In an embodiment of the present invention, the outer shell comprises two second side plates opposite to each other, and the two second side plates are respectively provided on outer sides of the two first side plates. A second flow channel and a second flame port are formed between any one of the second side plates and a corresponding first side plate, and the second flame port is communicated with the second flow channel.

[0021] In order to achieve the above purpose, the present invention also provides a gas device comprising the burner as described above.

[0022] In the burner of the technical solution of the present invention, the inner shell is provided with the first flame port and the gap portion at the top, and the outer shell is provided on the outer side of the inner shell and forms a second flame port with the inner shell at the top. One of the second flame port and the first flame port is the lean flame burner and the other of the second flame port and the first flame port is the rich flame burner, so that the gap portion separates the lean flame port from the rich flame port to stabilize the flame. By providing the first air guide port on the outer side wall of the inner shell forming the gap portion, the mixed air flow in the second flame port is guided into the gap portion, which can pull down the combustion flame located above the gap portion, and the phenomenon of alternating sufficient and insufficient air supply will not occur, thereby suppressing oscillatory combustion and reducing combustion vibration noise.BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or in the related art, the accompanying drawings needed to be used in the description of the embodiments or the related art will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on structures shown in these drawings without any creative effort. FIG. 1 is a schematic structural view of a burner according to an embodiment of the present invention. FIG. 2 is a top view of the burner according to the present invention. FIG. 3 is a cross-sectional view taken along line A-A in FIG. 2. FIG. 4 is a cross-sectional view taken along line B-B in FIG. 2. FIG. 5 is an exploded schematic view of a rectifying component, an inner shell and an outer shell according to an embodiment of the present invention. Description of reference signs:

[0024] reference signnamereference signname1inner shell21second side plate101first flame port201second flame port102gap portion202second air inlet103first air guide port3rectifying component104first air inlet31rectifying plate11first side plate3apress portion2outer shell

[0025] The realization of the purpose, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some rather than all of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present invention.

[0027] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship, movement conditions, etc. between the components in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0028] At the same time, the meaning of "and / or" in the text comprises three parallel solutions. Taking "A and / or B" as an example, it comprises solution A, or solution B, or a solution that A and B satisfy at the same time.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying its relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly comprise at least one of these features. In addition, the technical solutions in the various embodiments can be combined with each other, but it must be based on what a person of ordinary skill in the art can implement. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that such a combination of technical solutions does not exist, nor is it within the scope of the present invention.

[0030] Burners are key components in gas devices such as gas water heaters. To control harmful gas emissions during gas combustion, rich-lean burners that can achieve rich-lean combustion are increasingly used in the gas devices. The basic principle of rich-lean combustion is to make part of the gas burn under insufficient air conditions, that is, the gas burns too "rich", while the other part of the gas burns under excessive air conditions, that is, the gas burns too "lean". In the related art, in order to prevent interference between the rich flame and the lean flame and to ensure the effect of rich-lean combustion, a gap is provided between the rich flame port and the lean flame port of the burner. The excess air on the light flame side will flow to the top of the gap, and the mixed gas on the rich flame side will also flow to the top of the gap and burn at the position above the gap. However, the excess air from the lean mixed gas does not flow evenly to the top of the gap, which will cause the air above the gap to be insufficient at times, resulting in unstable combustion, prone to oscillating combustion, and combustion vibration noise.

[0031] Based on this, the present invention proposes a burner, which is designed to suppress oscillating combustion and reduce combustion vibration noise. It can be understood that the burner of this embodiment is a rich-lean burner, which can be applied to gas devices to achieve combination of the rich-lean flame combustion of gas, and take into account the flame transfer performance of the rich-lean burner and the emission reduction performance of the nitrogen oxide. While reducing the emission content of nitrogen oxides, the use efficiency of the rich-lean burner is improved. The gas device can be but is not limited to a gas water heater, a gas wall-mounted boiler, etc. The structure of the burner is described below.

[0032] In the embodiment of the present invention, as shown in FIG. 1 to FIG. 4, the burner comprises an inner shell 1 and an outer shell 2.

[0033] The top of the inner shell 1 is provided with a first flame port 101 and a gap portion 102 isolated from the first flame port 101. The outer shell 2 is provided on the outer side of the inner shell 1, and along with the inner shell 1, is formed with a second flame port 201 on the top. The second flame port 201 is located on the outer side of the gap portion 102 away from the first flame port 101. One of the first flame port 101 and the second flame port 201 is a lean flame port, and the other one of the first flame port 101 and the second flame port 201 is a rich flame port.

[0034] The outer wall of the inner shell 1 forming the gap portion 102 is provided with a first air guide port 103, which is used to guide the airflow in the second flame port 201 into the gap portion 102.

[0035] It can be understood that the rich flame port is the outlet for rich flame combustion, and the lean flame port is the outlet for lean flame combustion. The lean flame combustion and rich flame combustion are relative, that is, the stoichiometric ratio of fuel to air required for lean flame combustion and rich flame combustion deviates from the normal stoichiometric ratio. For the same amount of gas, lean flame combustion requires more air, while rich flame combustion requires less air. In this embodiment, one of the first flame port 101 and the second flame port 201 is a lean flame port, and the other one of the first flame port 101 and the second flame port 201 is a rich flame port. The first flame port 101 and the second flame port 201 are respectively provided on both sides of the gap portion 102 and separated by the gap portion 102, which can reduce the interference between the rich flame and the lean flame to a certain extent, and achieve the effect of stabilizing the flame.

[0036] A first air guide port 103 is provided on the outer wall of the inner shell 1 forming the gap portion 102, and the airflow in the second flame port 201 is introduced into the gap portion 102. It can be understood that in actual application, the types of the first flame port 101 and the second flame port 201 can be set according to actual needs. Then, when the type of the second flame port 201 is different from that of the first flame port 101, the corresponding airflow introduced into the gap portion 102 through the first air guide port 103 is also different.

[0037] When the second flame port 201 is the lean flame port, the first air guide port 103 can guide the lean mixed airflow on the lean flame side into the gap portion 102, then the excess air in the lean mixed airflow can be supplied from the inside of the gap portion 102 for the combustion above the gap portion 102. Therefore, the phenomenon of alternating sufficient and insufficient air supply can be avoided, thereby suppressing oscillatory combustion and reducing combustion vibration noise.

[0038] When the second flame port 201 is the rich flame port, the first air guide port 103 can guide the rich mixed gas on the rich flame side into the gap portion 102, so that the rich mixed gas can be supplied from the inside of the gap portion 102 to the top of the gap portion 102, and the phenomenon of alternating sufficient and insufficient air supply will not occur, thereby suppressing oscillatory combustion and reducing combustion vibration noise.

[0039] It can be seen that this embodiment can suppress the oscillating combustion and reduce the combustion vibration noise.

[0040] In practical applications, the shape and structure of the first air guide port 103 can be determined according to actual conditions, for example, it can be a through-hole structure or a notch structure, as long as the mixed airflow in the second flame port 201 can be introduced into the gap portion 102. Optionally, when the first air guide port 103 is a through-hole, it can be a circular hole, a triangular hole, a square hole or other special-shaped holes. Optionally, when the first air guide port 103 is a notch, it can be an arc-shaped port, a triangular port, a square port or other special-shaped ports.

[0041] In the burner of the technical solution of the present invention, the inner shell 1 is provided with the first flame port 101 and the gap portion 102 at the top, and the outer shell 2 is provided on the outer side of the inner shell 1 and forms a second flame port 201 with the inner shell 1 at the top. One of the second flame port 201 and the first flame port 101 is the lean flame burner and the other of the second flame port 201 and the first flame port 101 is the rich flame burner, so that the gap portion 102 separates the lean flame port from the rich flame port to stabilize the flame. By providing the first air guide port 103 on the outer side wall of the inner shell 1 forming the gap portion 102, the mixed air flow in the second flame port 201 is guided into the gap portion 102, which can pull down the combustion flame located above the gap portion 102, and the phenomenon of alternating sufficient and insufficient air supply will not occur, thereby suppressing oscillatory combustion and reducing combustion vibration noise.

[0042] In an embodiment of the present invention, as shown in FIG. 1 to FIG. 4, the first flame port 101 is the lean flame port, and the second flame port 201 is the rich flame port.

[0043] In this way, the first flame port 101 is for lean flame combustion, and the second flame port 201 is for rich flame combustion. As result, the lean flame is located inside the rich flame, providing most of the heat load, and the rich flame is located outside the lean flame for auxiliary combustion. At the same time, the rich mixed gas can be mixed and burned with the secondary air outside the burner, thereby improving the gas utilization rate.

[0044] It can be understood that, based on this embodiment, the first air guide port 103 can introduce the rich mixed gas from the rich flame port into the interior of the gap portion 102, so that the rich mixed gas can be supplied from the interior of the gap portion 102 to the top of the gap portion 102, which can lower the combustion flame above the gap portion 102, and avoid the phenomenon of alternating sufficient and insufficient air supply, thereby suppressing oscillatory combustion and reducing combustion vibration noise.

[0045] In an embodiment of the present invention, as shown in FIG. 1, FIG. 3 to FIG. 5, the inner shell 1 comprises two first side plates 11 arranged opposite to each other, a first flow channel and an opening at the top are formed between the two first side plates 11, and a second flame port 201 is formed between the first side plate 11 and the outer shell 2.

[0046] The rectifying component 3 is provided between the two first side plates 11. The rectifying component 3 separates the opening into the first flame port 101 and the gap portion 102. The first flame port 101 is formed on the inner side of the rectifying component 3 and is communicated with the first flow channel, and the gap portion 102 is formed between the rectifying component 3 and the first side plate 11 and is separated from the first flow channel.

[0047] The first side plate 11 separates the gap portion 102 from the second flame port 201, and the first air guide port 103 is provided on the first side plate 11.

[0048] It can be understood that the two first side plates 11 are opposite to each other in a width direction of the burner. The two ends of the two first side plates 11 are connected in the length direction, forming a cavity and a top opening between the two first side plates 11. Then, the cavity between the two first side plates 11 is pressed at the corresponding positions to form a first flow channel for circulating a mixture of gas and air. The first flow channel is a lean mixed gas flow channel for lean flame combustion. A first air inlet 104 for guiding air into the first flow channel is also formed between the two first side plates 11, and the first air inlet 104 can be matched with the gas nozzle. Optionally, the first air inlet 104 can be provided at the side or bottom according to actual conditions.

[0049] By providing the rectifying component 3 between the two first side plates 11, the rectifying component 3 is located near the top, and the opening at the top is divided into the first flame port 101 and the gap portion 102. Optionally, the two sides of the rectifying component 3 can respectively protrude towards and are abutted against the two first side plates 11, or the two first side plates 11 respectively protrude towards and are abutted against the two sides of the rectifying component 3, so that the first flame port 101 is formed on the inner side of the rectifying component 3 and is communicated with the first flow channel. The gap portion 102 is formed between the rectifying component 3 and the first side plate 11 and is separated from the first flow channel, so that the first flame port 101 and the gap portion 102 can be isolated from each other.

[0050] The outer shell 2 is provided on the outer side of the first side plate 11, and the second flame port 201 is formed between the outer shell 2 and the first side plate 11. The gap portion 102 can separate the first flame port 101 from the second flame port 201. Specifically, the gap portion 102 and the second flame port 201 are respectively located on two opposite sides of the first side plate 11. In this embodiment, the first air guide port 103 is provided on the first side plate 11, so that the inner cavity of the second flame port 201 is communicated with the gap portion 102, and the rich mixed gas in the second flame port 201 can be smoothly introduced into the gap portion 102 through the first air guide port 103, thereby achieving a noise reduction function.

[0051] Further, as shown in FIG. 1, FIG. 4 and FIG. 5, the rectifying component 3 comprises a plurality of rectifying plates 31 spaced apart in the width direction, and the plurality of rectifying plates 31 divide the first flame port 101 in the width direction. The rectifying component 3 is provided with a plurality of pressing portions 3a in its length direction, and the plurality of pressing portions 3a are abutted against the upper portions of the plurality of rectifying plates 31 to divide the first flame port 101 in the length direction. The gap portion 102 is formed between the outermost rectifying plate 31 and the corresponding first side plate 11.

[0052] This embodiment illustrates the structure of the rectifying component 3.The rectifying component 3 comprises a plurality of rectifying plates 31, which are arranged at an interval in the width direction. The two outermost rectifying plates 31 cooperate with the two first side plates 11 to form the gap portion 102 separated from the first flow channel. The channel inside the rectifying component 3 is communicated with the first flow channel, so that the first flame port 101 is formed inside the rectifying component 3. The plurality of rectifying plates 31 are arranged at an interval in the width direction, which can divide the first flame port 101 into a plurality of regions in the width direction. A plurality of press portions 3a are arranged in the length direction of the rectifying component 3, which divides the first flame port 101 into a plurality of regions in the length direction, so that the first flame port 101 is divided into a plurality of slender openings. In this way, the lean mixed gas can be ejected more evenly, thereby making the lean flame combustion distribution more even.

[0053] In an embodiment of the present invention, as shown in FIG. 1, FIG. 4 and FIG. 5, the outer shell 2 comprises two opposite second side plates 21, and the two second side plates 21 are respectively arranged on the outer side of the two first side plates 11. A second flow channel and a second flame port 201 are formed between any one of the second side plates 21 and the corresponding first side plates 11, and the second flame port 201 is communicated with the second flow channel.

[0054] In this embodiment, the structure of the outer shell 2 is illustrated by way of example. The two second side plates 21 are respectively provided on the outer side of the two first side plates 11 at an interval, and can be fixedly connected to the corresponding first side plate 11 by pressing or welding the corresponding positions of the second side plates 21. As a result, the second flow channel for circulating a mixture of gas and air and the second flame port 201 located at the top are formed between the second side plate 21 and the corresponding first side plate 11. The second flow channel is a rich mixed gas flow channel for rich flame combustion.

[0055] The second air inlet 202 for intake of air into the second flow channel is also provided between the second side plate 21 and the first side plate 11. Optionally, the second air inlet 202 can be provided on the second side plate 21 and / or the first side plate 11. As an example, the second air inlet 202 can be provided between the two first side plates 11. In this case, the opening direction of the second air inlet 202 is consistent with the opening direction of the first air inlet 104, so as to facilitate cooperation with the gas nozzle. In this way, the second air inlet 202 is isolated from the first flow channel and is not connected, so that the first flow channel and the second flow channel are independent of each other, and further the first flame port 101 and the second flame port 201 are independent of each other.

[0056] In an embodiment of the present invention, as shown in FIG. 3 to FIG. 5, the first air guide port 103 is a through hole that penetrates both sides of the first side plate 11.

[0057] In this embodiment, by providing the first air guide port 103 as the through hole, the first air guide port 103 will have a certain height gap with the top surface of the first side plate 11, so that the rich mixture flowing into the gap portion 102 from the first air guide port 103 will not diffuse outward (towards the rich flame ejection side), but instead flow above the gap portion 102. This allows the gas in the gap portion 102 to flow upward along the wall of the first side plate 11, enabling the flame to adhere to and burn on the top surface of the first side plate 11, thereby avoiding flame separation. Consequently, the formation of vortices near the upper end of the rectifying plate 31 at outermost can be avoided, and the high-frequency vibration combustion noise caused by these vortices can also be eliminated.

[0058] In order to achieve a better effect of eliminating high-frequency vibration combustion noise, in an embodiment, the distance between the first air guide port 103 and the top surface of the first side plate 11 in the height direction is defined as L1, and the width of the gap 103 is defined as L2. L1 is greater than or equal to L2. In this way, the distance L1 between the first air guide port 103 and the top surface of the first side plate 11 in the height direction can be long enough to achieve a better effect of preventing the generation of vortexes and avoiding high-frequency vibration combustion noise.

[0059] In an embodiment of the present application, as shown in FIG. 3 and FIG. 5, a plurality of first air guide ports 103 are provided, and the plurality of first air guide ports 103 are spaced apart in the length direction of the gap portion 102.

[0060] In this embodiment, the plurality of first air guide ports 103 are spaced apart in the length direction of the gap portion 102, so that a rich mixture gas is introduced from the second flame port 201 into the gap portion 102 in the length direction, and there is almost no longitudinal component when the rich air-fuel mixture flows in. Therefore, the rich mixture gas above the gap portion 102 is more evenly distributed in the length direction, thereby making the combustion flame above the gap portion 102 more evenly distributed, and further reducing the combustion vibration noise.

[0061] In an embodiment of the present invention, the outermost rectifying plate 31 is provided with a second air guide port (not shown) for guiding the airflow of the first flame port 101 into the gap portion 102.

[0062] In this way, the lean mixed gas and the rich mixed gas can be introduced into the gap portion 102 through the first air guide port 103 and the second air guide port at the same time, so that the lean mixed gas and the rich mixed gas are secondary mixed inside the gap portion 102, thereby making the combustion above the gap portion 102 more stable, reducing combustion vibration and noise.

[0063] The present invention also provides a gas device, which comprises a burner. The specific structure of the burner refers to the above embodiment. Since the gas device adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Optionally, the gas device can be a gas water heater, a gas wall-mounted boiler, a boiler, etc.

Claims

1. A burner comprising: an inner shell (1) provided with a first flame port (101) and a gap portion (102) at a top of the inner shell (1), wherein the first flame port (101) is isolated from the gap portion (102); and an outer shell (2) provided on an outer side of the inner shell (1) and forming a second flame port (201) with the inner shell (1) at a top, wherein the second flame port (201) is located on an outer side of the gap portion (102) away from the first flame port (101), one of the first flame port (101) and the second flame port (201) being a lean flame port, and the other one of the first flame port (101) and the second flame port (201) being a rich flame port; wherein a first air guide port (103) is provided on an outer side wall of the gap portion (102) formed by the inner shell (1), for guiding airflow in the second flame port (201) into the gap portion (102).

2. The burner according to claim 1, wherein the first flame port (101) is the lean flame port, and wherein the second flame port (201) is the rich flame port.

3. The burner according to claim 2, wherein the inner shell (1) comprises two first side plates (11) opposite to each other, a first flow channel and an opening at a top being formed between the two first side plates (11), the second flame port (201) being formed between the first side plate (11) and the outer shell (2); wherein a rectifying component (3) is provided between the two first side plates (11), the rectifying component (3) separating the opening into the first flame port (101) and the gap portion (102), the first flame port (101) being formed in the rectifying component (3) and being communicated with the first flow channel, the gap portion (102) being formed between the rectifying component (3) and the first side plate (11) and being separated from the first flow channel; and wherein the first side plate (11) separates the gap portion (102) from the second flame port (201), the first air guide port (103) being provided in the first side plate (11).

4. The burner according to claim 3, wherein the first air guide port (103) is a through hole penetrating through both sides of the first side plate (11).

5. The burner according to claim 4, wherein a distance between the first air guide port (103) and a top surface of the first side plate (11) in a height direction is defined as L1, and wherein a width of the gap portion (102) is L2, L1 being greater than or equal to L2.

6. The burner according to any one of claims 3 to 5, wherein the first air guide port (103) is a notch provided at a top end of the first side plate (11).

7. The burner according to any one of claims 1 to 6, wherein a plurality of the first air guide ports (103) are provided, the plurality of the first air guide ports (103) being provided at an interval in a length direction of the gap portion (102).

8. The burner according to any one of claims 3 to 6, wherein the rectifying component (3) comprises a plurality of rectifying plates (31) spaced apart in a width direction, the plurality of rectifying plates (31) dividing the first flame port (101) in the width direction; wherein the rectifying component (3) is provided with a plurality of press portions in a length direction, the plurality of press portions being abutted against upper portions of the plurality of rectifying plates (31) to divide the first flame port (101) in the length direction; and wherein the gap portion (102) is formed between a rectifying plate (31) on an outermost side and a corresponding first side plate (11).

9. The burner according to claim 8, wherein the rectifying plate (31) on the outermost side is provided with a second air guide port for guiding airflow of the first flame port (101) into the gap portion (102).

10. The burner according to any one of claims 3 to 6, wherein the outer shell (2) comprises two second side plates (21) opposite to each other, the two second side plates (21) being respectively provided on outer sides of the two first side plates (11), a second flow channel and the second flame port (201) being formed between any one of the second side plates (21) and a corresponding first side plate (11), the second flame port (201) being communicated with the second flow channel.

11. A gas device comprising a burner according to any one of claims 1 to 10.

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