Combustor and gas equipment

Abstract

The utility model discloses a burner and gas equipment. The combustor comprises an inner shell and an outer shell, and the top of the inner shell is provided with a first fire opening and a gap part which are isolated from each other; the outer shell is arranged on the outer side of the inner shell, a second fire opening is formed in the top of the outer shell and the inner shell, and the second fire opening is located in the outer side, away from the first fire opening, of the gap part. One of the first fire hole and the second fire hole is a light flame hole, and the other one is a rich flame hole; a first air guide port is formed in the outer side wall, where the gap part is formed, of the inner shell and used for guiding airflow in the second fire port into the gap part. According to the technical scheme, combustion vibration noise can be effectively reduced.

Description

Technical Field

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

[0002] The burner is a key component in gas equipment such as gas water heaters. In order to control the emission of harmful gases during gas combustion, rich-lean burners that can achieve rich-lean combustion are becoming more and more widely used in gas equipment.

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

[0004] In the related art, in order to prevent interference between the rich flame and the light flame and thus prevent the effect of rich-lean combustion from being achieved, a gap is set between the rich fire port and the light fire port of the burner, and 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 a position above the gap. However, the combustion above the gap is prone to oscillating combustion, causing combustion noise. Utility Model Content

[0005] The main purpose of the utility model is to provide a burner, aiming at reducing combustion vibration noise.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a burner, comprising:

[0007] An inner shell having a top with a first burner and a gap portion isolated from each other; and

[0008] An outer shell is arranged on the outer side of the inner shell and forms a second burner at the top with the inner shell, wherein the second burner is located on the outer side of the gap away from the first burner; wherein one of the first burner and the second burner is a light flame burner and the other is a rich flame burner;

[0009] The outer side wall of the inner shell forming the gap portion is provided with a first air guide port for guiding the airflow in the second burner into the gap portion.

[0010] In one embodiment of the present application, the first burner is a light flame burner, and the second burner is a rich flame burner.

[0011] In one embodiment of the present application, the inner shell includes two first side plates arranged opposite to each other, a first flow channel and an opening at the top are formed between the two first side plates, and the second fire port is formed between the first side plate and the outer shell;

[0012] A rectifying component is provided between the two first side plates, the rectifying component divides the opening into the first burner and the gap portion, the first burner is formed in the rectifying component and communicates with the first flow channel, the gap portion is formed between the rectifying component and the first side plates and is separated from the first flow channel;

[0013] The first side plate separates the gap portion from the second fire port, and the first air guide port is provided on the first side plate.

[0014] In one embodiment of the present application, the first air guide port is a through hole that passes through two sides of the first side plate.

[0015] In one embodiment of the present application, the distance between the first air guide port and the top surface of the first side plate in the height direction is defined as L1, and the width of the gap portion is defined as L2, satisfying: L1 ≥ L2.

[0016] In one embodiment of the present application, the first air guide port is a notch provided at the top end of the first side plate.

[0017] In one embodiment of the present application, a plurality of first air guide ports are provided, and the plurality of first air guide ports are spaced apart and distributed in the length direction of the gap portion.

[0018] In one embodiment of the present application, the rectifying component includes a plurality of rectifying plates spaced apart in the width direction, and the plurality of rectifying plates divide the first burner in the width direction;

[0019] The rectifying component is provided with a plurality of press-type parts in the length direction thereof, and the plurality of press-type parts abut against the upper parts of the plurality of rectifying plates so as to divide the first burner in the length direction;

[0020] Wherein, the gap portion is formed between the outermost rectifying plate and the corresponding first side plate.

[0021] In one embodiment of the present application, the outermost rectifying plate is provided with a second air guide port for guiding the airflow of the first burner into the gap portion.

[0022] In one embodiment of the present application, the outer shell includes two opposite second side panels, and the two second side panels are respectively arranged on the outside of the two first side panels, and a second flow channel and a second flame port are formed between any second side panel and the corresponding first side panel, and the second flame port is connected to the second flow channel.

[0023] To achieve the above objectives, the present application also provides a gas-fired device, including the above-mentioned burner.

[0024] In the burner of the utility model technical solution, the top of the inner shell has a first burner and a gap portion, and the outer shell is arranged on the outer side of the inner shell and forms a second burner with the inner shell at the top, wherein one of the second burner and the first burner is a light flame burner and the other is a rich flame burner, so that the gap portion separates the light flame burner from the rich flame burner to play a flame stabilizing role. By arranging a first air guide port on the outer side wall of the inner shell forming the gap portion, the mixed air flow in the second burner is introduced into the gap portion, which can pull down the combustion flame located above the gap portion, and the phenomenon of insufficient air at one time and insufficient air at another time will not occur, thereby achieving the suppression of oscillating combustion and reducing combustion vibration noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 This is a schematic structural diagram of an embodiment of a burner of the utility model;

[0027] Figure 2 It is a top view of the burner of the utility model;

[0028] Figure 3 for Figure 2 Sectional view of AA in the middle;

[0029] Figure 4 for Figure 2 Cross-sectional view of the middle BB;

[0030] Figure 5 It is an exploded schematic diagram of the rectifying component, the inner shell and the outer shell in the embodiment of the utility model.

[0031] Description of Figure Numbers:

[0032] Label name Label name 1 Inner shell 21 Second side panel 101 The first fire outlet 201 Second burner 102 Gap 202 Second air inlet 103 The first air inlet 3 Rectification components 104 First air inlet 31 Rectifier 11 First side panel 3a Pressing Department 2 shell

[0033] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0038] The burner is a key component in gas equipment such as gas water heaters. In order to control the emission of harmful gases during gas combustion, the rich-lean burner that can achieve rich-lean combustion is more and more widely used in gas equipment. The basic principle of rich-lean combustion is to make a part of the gas burn under the condition of insufficient air, that is, the gas burns too "rich", and the other part of the gas burns under the condition of too much air, that is, the gas burns too "lean". In the related technology, in order to prevent the interference between the rich flame and the light flame and fail to achieve the effect of rich-lean combustion, a gap portion is set between the rich flame port and the light flame port of the burner, and the excess air on the light flame side will flow to the top of the gap portion, and the mixed gas on the rich flame side will also flow to the top of the gap portion and burn at the position above the gap portion. However, the excess air from the light mixed gas does not flow evenly to the top of the gap portion, which will cause the air above the gap portion to be sufficient and insufficient at times, resulting in unstable combustion, easy to produce oscillating combustion, and cause combustion vibration noise.

[0039] Based on this, the utility model 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 thick-lean burner, which can be applied to gas equipment to achieve the rich-lean flame combination combustion of gas, and take into account the flame transfer performance of the thick-lean burner and the nitrogen oxide emission reduction performance, while reducing the emission content of nitrogen oxides, and improving the use efficiency of the thick-lean burner. Among them, the gas equipment can be but is not limited to a gas water heater, a gas wall-mounted boiler, etc. The structure of the burner is explained below.

[0040] In the embodiment of the present utility model, Figures 1 to 4 As shown, the burner includes an inner shell 1 and an outer shell 2.

[0041] The top of the inner shell 1 has a first burner 101 and a gap 102 that are isolated from each other; the outer shell 2 is arranged on the outside of the inner shell 1, and a second burner 201 is formed on the top of the inner shell 1, and the second burner 201 is located on the outside of the gap 102 away from the first burner 101; wherein one of the first burner 101 and the second burner 201 is a light flame burner, and the other is a rich flame burner;

[0042] A first air guide port 103 is disposed on the outer wall of the inner shell 1 forming the gap portion 102 , so as to guide the airflow in the second burner 201 into the gap portion 102 .

[0043] It can be understood that the rich flame port is the outlet for rich flame combustion, and the light flame port is the outlet for light flame combustion. Light flame combustion and rich flame combustion are relative, that is, the equivalent ratio of fuel to air required for light flame combustion and rich flame combustion deviates from the normal equivalent ratio. For the same amount of gas, light flame combustion requires more air, while rich flame combustion requires less air. In this embodiment, one of the first burner 101 and the second burner 201 is a light flame port, and the other is a rich flame port. The first burner 101 and the second burner 201 are respectively arranged 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 light flame to a certain extent, and achieve the effect of flame stabilization.

[0044] A first air guide port 103 is provided on the outer wall of the inner shell 1 forming the gap portion 102, so as to guide the airflow in the second burner 201 into the gap portion 102. It can be understood that in actual application, the types of the first burner 101 and the second burner 201 can be set according to actual needs. Then, when the types of the second burner 201 are different, the corresponding airflow introduced into the gap portion 102 through the first air guide port 103 is also different:

[0045] When the second burner 201 is a light flame burner, the first air guide port 103 can guide the light mixed airflow on the light flame side into the gap portion 102, so that the excess air in the light mixed airflow can be supplemented from the gap portion 102 for the combustion above the gap portion 102, and the phenomenon of insufficient air at one time and insufficient air at another time will not occur, so that the oscillating combustion can be suppressed and the combustion vibration noise can be reduced;

[0046] When the second burner 201 is a rich flame port, the first gas guide port 103 can introduce 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 insufficient air at one moment and sufficient air at another moment will not occur. This can suppress oscillating combustion and reduce combustion vibration noise.

[0047] It can be seen from this that this embodiment can suppress oscillating combustion and reduce combustion vibration noise.

[0048] 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 burner 201 can be introduced into the gap portion 102. Optionally, when the first air guide port 103 is a through-hole structure, 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 structure, it can be an arc-shaped port, a triangular port, a square port or other special-shaped ports.

[0049] In the burner of the utility model technical solution, the top of the inner shell 1 has a first burner 101 and a gap portion 102, and the outer shell 2 is arranged on the outer side of the inner shell 1 and forms a second burner 201 with the inner shell 1 at the top, wherein one of the second burner 201 and the first burner 101 is a light flame burner and the other is a rich flame burner, so that the gap portion 102 separates the light flame burner from the rich flame burner to play a flame stabilizing role. By arranging 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 burner 201 is introduced into the gap portion 102, which can pull down the combustion flame located above the gap portion 102, and there will be no phenomenon of sufficient air at one time and insufficient air at another time, thereby being able to suppress oscillating combustion and reduce combustion vibration noise.

[0050] In one embodiment of the present application, Figures 1 to 4 The first burner 101 is a light flame burner, and the second burner 201 is a rich flame burner.

[0051] With such an arrangement, the first burner 101 burns with a light flame, and the second burner 201 burns with a rich flame, so that the light flame is located inside the rich flame and provides most of the heat load, and the rich flame is located outside the light flame for auxiliary combustion. At the same time, the rich mixture can be mixed and burned with the secondary air outside the burner to improve the gas utilization rate.

[0052] 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, avoiding the phenomenon of insufficient air at one moment and sufficient air at another moment, thereby avoiding combustion vibration and achieving the purpose of reducing combustion noise.

[0053] In one embodiment of the present application, Figure 1 , Figures 3 to 5 The inner shell 1 includes 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 burner 201 is formed between the first side plate 11 and the outer shell 2;

[0054] A rectifying component 3 is provided between the two first side plates 11, and the rectifying component 3 divides the opening into a first burner 101 and a gap 102. The first burner 101 is formed inside the rectifying component 3 and communicates with the first flow channel, and the gap 102 is formed between the rectifying component 3 and the first side plate 11 and is separated from the first flow channel.

[0055] The first side plate 11 separates the gap portion 102 from the second burner 201 , and the first air guide port 103 is disposed on the first side plate 11 .

[0056] It can be understood that the two first side plates 11 are arranged opposite to each other in the width direction of the burner, and the two first side plates 11 are connected at both ends in the length direction, so that a cavity and a top opening are formed between the two first side plates 11, and 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, wherein the first flow channel is a light mixed gas flow channel for light flame combustion. A first air inlet 104 for intake 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 arranged at the side or bottom position according to actual conditions.

[0057] By arranging a 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 a first fire port 101 and a gap portion 102. Optionally, the two sides of the rectifying component 3 can be respectively protruded and abutted against the two first side plates 11, or the two first side plates 11 are respectively protruded and abutted against the two sides of the rectifying component 3, so that the first fire port 101 is formed on the inner side of the rectifying component 3 and is connected to 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, so that the first fire port 101 and the gap portion 102 can be isolated from each other.

[0058] The housing 2 is disposed on the outer side of the first side plate 11, and a second burner 201 is formed between the housing 2 and the first side plate 11. The gap portion 102 can separate the first burner 101 from the second burner 102. Specifically, the gap portion 102 and the second burner 201 are respectively located on opposite sides of the first side plate 11. In this embodiment, the first air guide port 103 is disposed on the first side plate 11, so that the inner cavity of the second burner 201 is connected to the gap portion 102, so that the rich mixed gas in the second burner 201 can be smoothly introduced into the gap portion 102 through the first air guide port 103, thereby achieving a noise reduction function.

[0059] Furthermore, if Figure 1 , Figure 4 as well as Figure 5 The rectifying component 3 includes a plurality of rectifying plates 31 spaced apart in the width direction, and the plurality of rectifying plates 31 divide the first burner 101 in the width direction; the rectifying component 3 is provided with a plurality of profiling portions 3a in its length direction, and the plurality of profiling portions 3a abut against the upper portions of the plurality of rectifying plates 31 to divide the first burner 101 in the length direction; wherein a gap portion 102 is formed between the outermost rectifying plate 31 and the corresponding first side plate 11.

[0060] This embodiment illustrates the structure of the rectifying component 3, which includes a plurality of rectifying plates 31, which are arranged at intervals in the width direction, and the two outermost rectifying plates 31 cooperate with the two first side plates 11 to form a gap portion 102 separated from the first flow channel, and the channel inside the rectifying component 3 is connected to the first flow channel, so that the first burner 101 is formed inside the rectifying component 3. The plurality of rectifying plates 31 are arranged at intervals in the width direction, which can divide the first burner 101 into a plurality of regions in the width direction, and a plurality of pressed parts 3a are arranged in the length direction of the rectifying component 3, which divides the first burner 101 into a plurality of regions in the length direction, so that the first burner 101 is divided into a plurality of slender openings, so that the light mixed gas can be ejected more evenly, thereby making the light flame combustion distribution more even.

[0061] In one embodiment of the present application, Figure 1 , Figure 4 as well as Figure 5 The shell 2 includes two opposite second side panels 21, and the two second side panels 21 are respectively arranged on the outside of the two first side panels 11. A second flow channel and a second burner 201 are formed between any second side panel 21 and the corresponding first side panel 11, and the second burner 201 is connected to the second flow channel.

[0062] In this embodiment, the structure of the shell 2 is illustrated by way of example. The two second side panels 21 are respectively arranged at intervals on the outsides of the two first side panels 11. The second side panels 21 can be fixedly connected to the corresponding first side panels 11 by pressing or welding corresponding positions thereof, so that a second flow channel for circulating a mixture of fuel gas and air and a second burner 201 located at the top are formed between the second side panels 21 and the corresponding first side panels 11, wherein the second flow channel is a rich mixed gas flow channel for rich flame combustion.

[0063] A 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 burner 101 and the second burner 201 are independent of each other.

[0064] In one embodiment of the present application, Figures 3 to 5 The first air guide port 103 is a through hole that passes through both sides of the first side plate 11 .

[0065] In this embodiment, by setting the first air guide port 103 as a through-hole structure, the first air guide port 103 will have a certain height distance from 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 to the outside (the side where the rich flame is ejected), but will flow at the upper position of the gap portion 102, so that the gas in the gap portion 102 can flow upward along the wall surface of the first side plate 11, so that the flame can adhere to the top surface of the first side plate 11 and burn, avoiding flame separation. In this way, the generation of vortex near the upper end of the outermost rectifying plate 31 can be avoided, and the high-frequency vibration combustion noise caused by it can also be avoided.

[0066] In order to achieve a better effect of eliminating high-frequency vibration combustion noise, in one 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 portion 103 is defined as L2, satisfying: L1 ≥ L2. In this way, the height distance L1 between the first air guide port 103 and the top surface of the first side plate 11 can be long enough to achieve a better effect of preventing the generation of vortexes and avoiding high-frequency vibration combustion noise.

[0067] In one embodiment of the present application, Figure 3 and Figure 5 A plurality of first air guide ports 103 are provided, and the plurality of first air guide ports 103 are spaced apart and distributed in the length direction of the gap portion 102 .

[0068] In this embodiment, multiple first air guide ports 103 are distributed at intervals in the length direction of the gap portion 102, so that a rich mixture is introduced from the second burner 201 into the gap portion 102 in the length direction. There is almost no longitudinal component when the rich air-fuel mixture flows in. Therefore, the rich mixture above the gap portion 102 is more evenly distributed in the length direction, and the combustion flame above the gap portion 102 is more evenly distributed, thereby further reducing the combustion vibration noise.

[0069] In one embodiment of the present application, the outermost rectifying plate 31 is provided with a second air guide port (not shown) for guiding the airflow of the first burner 101 into the gap portion 102 .

[0070] With such arrangement, a lean mixture and a rich mixture 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 mixture and the rich mixture are secondary mixed inside the gap portion 102, thereby making the combustion above the gap portion 102 more stable, reducing combustion vibration and lowering noise.

[0071] The utility model also provides a gas device, which includes a burner. The specific structure of the burner refers to the above embodiment. Since the gas device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Optionally, the gas device can be a gas water heater, a gas wall-mounted boiler, a boiler, etc.

[0072] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A burner, characterized in that: include: An inner shell, the top of which has a first fire port and a gap portion isolated from each other; and An outer shell is arranged on the outer side of the inner shell and forms a second burner at the top with the inner shell, wherein the second burner is located on the outer side of the gap away from the first burner; wherein one of the first burner and the second burner is a light flame burner and the other is a rich flame burner; The outer side wall of the inner shell forming the gap portion is provided with a first air guide port for guiding the airflow in the second burner into the gap portion.

2. The burner according to claim 1, characterized in that The first burner is a light flame burner, and the second burner is a rich flame burner.

3. The burner according to claim 2, characterized in that The inner shell comprises two first side plates arranged opposite to each other, a first flow channel and an opening at the top are formed between the two first side plates, and the second fire port is formed between the first side plate and the outer shell; A rectifying component is provided between the two first side plates, the rectifying component divides the opening into the first burner and the gap portion, the first burner is formed in the rectifying component and communicates with the first flow channel, the gap portion is formed between the rectifying component and the first side plates and is separated from the first flow channel; The first side plate separates the gap portion from the second fire port, and the first air guide port is provided on the first side plate.

4. The burner according to claim 3, characterized in that The first air guide port is a through hole that passes through two sides of the first side plate.

5. The burner according to claim 4, characterized in that The distance between the first air guide port and the top surface of the first side plate in the height direction is defined as L1, and the width of the gap portion is defined as L2, satisfying: L1≥L2.

6. The burner according to claim 3, characterized in that The first air guide port is a notch arranged at the top end of the first side plate.

7. The burner according to any one of claims 1 to 6, characterized in that A plurality of the first air guide ports are provided, and the plurality of the first air guide ports are distributed at intervals in the length direction of the gap portion.

8. The burner according to any one of claims 3 to 6, characterized in that The rectifying component includes a plurality of rectifying plates spaced apart in the width direction, and the plurality of rectifying plates divide the first burner in the width direction; The rectifying component is provided with a plurality of press-type parts in the length direction thereof, and the plurality of press-type parts abut against the upper parts of the plurality of rectifying plates so as to divide the first burner in the length direction; Wherein, the gap portion is formed between the outermost rectifying plate and the corresponding first side plate.

9. The burner according to claim 8, characterized in that The outermost rectifying plate is provided with a second air guide port for guiding the airflow of the first burner into the gap portion.

10. The burner according to any one of claims 3 to 6, characterized in that The shell includes two opposite second side panels, and the two second side panels are respectively arranged on the outsides of the two first side panels. A second flow channel and a second burner are formed between any second side panel and the corresponding first side panel, and the second burner is connected to the second flow channel.

11. A gas equipment, characterized in that: Comprising a burner as claimed in any one of claims 1 to 10.

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