Combustion head, fire grate and gas equipment

Abstract

The utility model discloses a combustion head, fire grate and gas equipment wherein the combustion head comprises: a combustion cover comprising a fire distribution plate, the fire distribution plate is provided with a plurality of combustion fire ports arranged at intervals, the fire distribution plate forms a separation part between two adjacent combustion fire ports, at least part of the separation part is provided with a first welding position; and the metal net is arranged on the combustion cover and covers the combustion fire ports, the metal net is provided with first welding spots corresponding to the first welding positions, and the metal net is welded to the first welding positions through the first welding spots. According to the technical scheme, flame lifting can be avoided, combustion stability and combustion sufficiency are improved, and emission of nitric oxide is reduced.

Description

Technical Field

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

[0002] A burner is a core component of a gas equipment.

[0003] In related technologies, some burners are equipped with a metal mesh at the combustion head of their burners, and fine combustion holes are formed by using the mesh holes of the metal mesh. However, the resistance of the metal mesh holes is relatively small. When the fan air velocity fluctuates, it is often prone to flame lift-off and flashback phenomena, resulting in problems such as unstable combustion, poor flue gas emissions, and combustion resonance. Summary of the Utility Model

[0004] The main object of the utility model is to propose a combustion head, aiming to avoid flame lift-off and flashback, improve combustion stability and combustion sufficiency, and reduce the emission of nitrogen oxides.

[0005] To achieve the above object, the combustion head proposed by the utility model includes:

[0006] A combustion cover, including a flame dividing plate, the flame dividing plate is provided with a plurality of combustion ports arranged at intervals, a partition is formed between adjacent two of the combustion ports on the flame dividing plate, and at least part of the partition is provided with a first welding position; and

[0007] A metal mesh, arranged on the combustion cover and covering a plurality of the combustion ports, the metal mesh is provided with first solder joints corresponding to the first welding positions, and the metal mesh is welded to the first welding positions through the first solder joints.

[0008] In an embodiment, the flame dividing plate is provided with a plurality of the first welding positions along the length direction, the metal mesh is provided with a plurality of the first solder joints along the length direction, and the first solder joints are welded to the first welding positions one by one;

[0009] And / or, the first welding position is arranged at the middle position in the width direction of the flame dividing plate.

[0010] In an embodiment, the partition provided with the first welding position is circular or oval.

[0011] In an embodiment, the metal mesh is provided with multiple layers;

[0012] And / or, the metal mesh is arranged on the combustion back surface of the flame dividing plate.

[0013] In one embodiment, in the length direction of the flame dividing plate, the flame dividing plate includes a middle region and two end regions respectively located at both ends of the middle region; the opening area of a single combustion burner port located in the end region is smaller than the opening area of a single combustion burner port located in the middle region.

[0014] In one embodiment, the flame dividing plate has a hollowed-out region, and the flame dividing plate includes a first rib and a second rib disposed in the hollowed-out region. The first rib and the second rib are arranged in a cross shape to divide the hollowed-out region into a plurality of combustion burner ports, and the cross portion of the first rib and the second rib forms the dividing portion.

[0015] In one embodiment, the first rib extends along the width direction of the flame dividing plate, the second rib extends along the length direction of the flame dividing plate, a plurality of the first ribs are arranged at intervals along the length direction of the flame dividing plate, and the second rib is disposed between at least some adjacent two of the first ribs.

[0016] In one embodiment, in the length direction of the flame dividing plate, the flame dividing plate includes a middle region and two end regions respectively located at both ends of the middle region;

[0017] The arrangement density of the first ribs located in the middle region is greater than the arrangement density of the first ribs located in the end region;

[0018] And / or, among the plurality of second ribs arranged in the length direction of the flame dividing plate, at least some adjacent two of the second ribs are arranged in a staggered manner in the width direction of the flame dividing plate in the middle region.

[0019] In one embodiment, the flame dividing plate has covering regions on both sides in the length direction of the hollowed-out region. The covering regions are provided with second welding positions, and both ends of the metal mesh are respectively provided with second solder joints corresponding to the second welding positions. The metal mesh is welded to the second welding positions through the second solder joints.

[0020] In one embodiment, the side edge of the flame dividing plate is provided with a flanging at a position corresponding to at least some of the combustion burner ports. A notch is formed between at least some of the flangings and the side edges of the corresponding combustion burner ports, and a part of the side edge of the metal mesh is located at the bottom side of the flanging.

[0021] The present utility model further provides a burner assembly, including:

[0022] A burner assembly body, provided with an air flow channel and an air outlet communicated with the air flow channel; and

[0023] The combustion head as described above, and the combustion head is installed at the air outlet.

[0024] The present utility model also provides a gas device, including the burner row as described above.

[0025] In the technical solution of the present utility model, a plurality of spaced combustion ports are provided on the flame dividing plate of the combustion cover, and a metal mesh covers the plurality of combustion ports. On the one hand, it can increase the combustion area, and on the other hand, it can disperse the airflow, making the combustion more uniform and stable. Moreover, the metal mesh is welded to the first welding position of the partition part through the first solder joints. During the spot welding process of the metal mesh, the center position of the first solder joint is most obviously extruded and melted into one body at high temperature. Therefore, the metal mesh at the center position of the first solder joint is the densest and has the greatest resistance, and it diffuses from the middle to the surrounding, and the resistance gradually changes from the maximum when it is dense to the normal resistance in the natural state of the metal mesh. The design of the solder joints endows the metal mesh with the characteristic of gradually changing resistance. When the airflow ejected from the air flow channel burns on the metal mesh, the flames are connected into one piece. At the position with large resistance, the gas flow rate is slow and it is not easy to blow out the flame or separate from the flame. Therefore, the flame stabilizing effect near the solder joints of the metal mesh is the best, and at the same time, it is connected with the surrounding flames to play a pulling role. Compared with the related art without the solder joint design, the overall flame of the combustion head is more stable and not easy to blow out the flame or separate from the flame. At the same time, due to the shielding of the partition part, the airflow resistance can be further increased, and the flame stabilizing effect can be improved. In this way, through the cooperation of the metal mesh and the flame dividing plate, and the combined design of welding the first solder joints to the first welding position of the partition part, the overall flame of the combustion head can be made more stable, not easy to blow out the flame or separate from the flame, the combustion is more complete, and the nitrogen oxide emission in the combustion flue gas is lower. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0027] Figure 1 It is a schematic structural view of an embodiment of the burner row of the present utility model;

[0028] Figure 2 It is Figure 1 the exploded structural view of the burner row in

[0029] Figure 3 It is a schematic structural view of an embodiment of the combustion head of the present utility model;

[0030] Figure 4 It is Figure 3 the top view of the combustion head in

[0031] Figure 5Structural schematic diagram of a combustion cover in an embodiment of the present utility model;

[0032] Figure 6 is Figure 5 Top view of the combustion cover in

[0033] Figure 7 Top view of the combustion cover in another embodiment of the present utility model;

[0034] Figure 8 Structural schematic diagram of a metal mesh in an embodiment of the present utility model;

[0035] Figure 9 Top view of the solder joints of the metal mesh in an embodiment of the present utility model;

[0036] Figure 10 Side view of the solder joints of the metal mesh in an embodiment of the present utility model.

[0037] Explanation of the reference numerals in the drawings:

[0038] 1000, burner manifold;

[0039] 100, burner manifold body; 101, air flow channel; 102, air inlet; 103, air outlet; 104, lateral convex; 105, flame stabilizing port;

[0040] 200, combustion head; 20, combustion cover; 21, flame dividing plate; 21a, middle area; 21b, end area; 211, combustion flame port; 211a, first combustion flame port; 211b, second combustion flame port; 211c, third combustion flame port; 211d, fourth combustion flame port; 212, flanging; 213, notch; 214, first rib; 215, second rib; 216, convex part; 217, dividing part; 22, side plate; 30, metal mesh; 31, first solder joint; 32, second solder joint;

[0041] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0042] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0043] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, then such directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture. If this specific posture changes, then the directional indications will also change accordingly.

[0044] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, then such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0045] In the related art, some burner fire rows are equipped with metal meshes at their combustion heads, and the mesh holes of the metal meshes are used to form fine combustion fire holes. However, the resistance of the metal mesh fire holes is relatively small. When the fan air velocity fluctuates, it is often prone to flame detachment and flashback phenomena, resulting in problems such as unstable combustion, poor flue gas emissions, and combustion resonance.

[0046] Based on this, the present utility model proposes a combustion head 200, aiming to increase the resistance of the corresponding part by setting welding points on the metal mesh 30, reduce the air flow intensity, avoid the occurrence of flame detachment and flashback phenomena, improve the combustion stability and combustion sufficiency, and reduce the emission of nitrogen oxides.

[0047] Please refer to Figure 1 and Figure 2 , the combustion head 200 can be applied to the fire row 1000. The fire row body 100 of the fire row 1000 has an air flow channel 101 for introducing gas and air. Both ends of the air flow channel 101 have an air inlet 102 and an air outlet 103 that penetrate the surface of the fire row body 100 respectively. Optionally, the air inlet 102 is provided at a position lower on the side of the fire row body 100, and the air outlet 103 is provided at the top of the fire row body 100. The air flow channel 101 is arranged in a curved shape. The combustion head 200 is arranged at the air outlet 103 of the fire row body 100. The gas and air mixed in the air flow channel 101 are ejected through the air outlet 103 and burned at the combustion fire hole 211 of the combustion head 200 to generate a flame. The structure of the combustion head 200 will be described below by way of embodiments.

[0048] Please refer to Figure 3 and Figure 4 In an embodiment of the present utility model, the combustion head 200 includes a combustion cover 20 and a metal mesh 30. The combustion cover 20 includes a flame dividing plate 21, and the flame dividing plate 21 is provided with a plurality of combustion ports 211 arranged at intervals. A partition portion 217 is formed between adjacent two combustion ports 211 on the flame dividing plate 21, and at least part of the partition portion 217 is provided with a first welding position; the metal mesh 30 is arranged on the combustion cover 20 and covers a plurality of combustion ports 211. The metal mesh 30 is provided with a first solder joint 31 corresponding to the first welding position, and the metal mesh 30 is welded to the first welding position through the first solder joint 31.

[0049] It can be understood that the combustion cover 20 is arranged at the air outlet 103 of the burner body 100. The flame dividing plate 21 is arranged opposite to the air outlet 103. The air flow channel 101 in the burner body 100 is connected to an air flow source through an air inlet 102. The air flow source includes air and gas. The gas and air enter the air flow channel 101 from the air inlet 102, are pre-mixed in the air flow channel 101, then flow to the air outlet 103, are ejected through a plurality of combustion ports 211 on the combustion cover 20 and are ignited to form combustion flames. The specific structure of the combustion cover 20 can be determined according to actual situations. For example, it can be a plate structure, a U-shaped structure or other shaped structures. The combustion cover 20 can be made of high-temperature resistant sheet metal parts. The plurality of combustion ports 211 on the flame dividing plate 21 are distributed at intervals, which can play a role in flow equalization, making the air flow more uniform when ejected. Optionally, the shape of the combustion port 211 can be circular, square, triangular, strip-shaped or other irregular shapes.

[0050] The metal mesh 30 is arranged on the combustion cover 20 and covers a plurality of combustion ports 211. Among them, the metal mesh 30 can be composed of high-temperature resistant materials, such as ferritic chromium-aluminum materials. The metal mesh 30 can be set to be single-layer or multi-layer according to needs, and no specific limitation is made here. By using the metal mesh 30, on the one hand, compared with the strip-shaped fire holes of the traditional burner 1000, the burner area of the burner 1000 can be increased. On the other hand, the fire holes can be dispersed, avoiding the problem of local high temperature of the strip-shaped fire holes, making the temperature of the combustion surface of the burner 1000 more uniform, reducing the heat intensity of the fire holes, having no local high temperature, effectively suppressing the generation of nitrogen oxides (NOx), and thus realizing low-nitrogen combustion (NOx in gas water heaters is mainly generated due to high combustion temperature). In addition, the metal mesh 30 can also prevent safety accidents such as explosion caused by flashback.

[0051] In this embodiment, a partition portion 217 is formed between two adjacent combustion ports 211 on the flame dividing plate 21. The adjacent two combustion ports 211 can be separated by the partition portion 217, and the gas resistance of the gas flowing out from the gas flow channel 101 of the burner block 1000 can be increased, so that the gas flow velocity is relatively slow at the peripheral portion of the partition portion 217, having a flame stabilizing effect. At least a part of the partition portion 217 is provided with a first welding position. For example, when a plurality of partition portions 217 are arranged along the length direction of the flame dividing plate 21, a first welding position can be provided on each partition portion 217, or a first welding position can be provided on the partition portion 217 corresponding to the region where the gas flow velocity is relatively fast. A first solder joint 31 is provided at a position on the metal mesh 30 corresponding to the first welding position, and the metal mesh 30 is welded to the first welding position through the first solder joint 31, so that the metal mesh 30 and the flame dividing plate 21 are welded and fixed together.

[0052] The technical solution of the present utility model has a plurality of spaced-apart combustion ports 211 provided on the flame dividing plate 21 of the combustion cover 20 of the combustion cover 20, and the metal mesh 30 covers the plurality of combustion ports 211. On the one hand, it can increase the combustion area, and on the other hand, it can disperse the air flow, making the combustion more uniform and stable. As Figure 9 and Figure 10 shown, the metal mesh 30 is welded to the first welding position of the partition portion 217 through the first solder joint 31. During the spot welding process of the metal mesh 30, the central position of the first solder joint 31 is the most obviously extruded and melted into one body at high temperature. Therefore, the metal mesh 30 at the central position of the first solder joint 31 is the densest and has the greatest resistance, spreading from the middle to the surrounding, and the resistance gradually changes from the maximum when it is tight to the normal resistance in the natural state of the metal mesh 30. The design of the solder joints makes the metal mesh 30 have the characteristic of gradually changing resistance. When the gas flow ejected from the gas flow channel 101 burns on the metal mesh 30, the flames are connected into one piece. At the position with large resistance, the gas flow velocity is slow and it is not easy to blow out the flame or separate from the flame. Therefore, the flame stabilizing effect near the solder joints of the metal mesh 30 is the best, and at the same time, it is connected with the surrounding flames to play a pulling role. Compared with the related art without the solder joint design, the overall flame of the combustion head 200 is more stable and not easy to blow out the flame or separate from the flame. At the same time, due to the shielding of the partition portion 217, the gas flow resistance can be further increased to enhance the flame stabilizing effect. In this way, through the cooperation of the metal mesh 30 and the flame dividing plate 21, and through the combined design of welding the first solder joint 31 to the first welding position of the partition portion 217, the overall flame of the combustion head 200 can be made more stable, not easy to blow out the flame or separate from the flame, the combustion is more complete, and the nitrogen oxide emission in the combustion flue gas is lower.

[0053] As Figure 3 shown, in one embodiment, a plurality of first welding positions are provided on the flame dividing plate 21 along the length direction, and a plurality of first solder joints 31 are provided on the metal mesh 30 along the length direction, and the first solder joints 31 are welded to the first welding positions one by one.

[0054] In this embodiment, a plurality of combustion ports 211 are provided at intervals along the length direction of the flame dividing plate 21, and a partition portion 217 is formed between any two adjacent combustion ports 211. As a result, a plurality of partition portions 217 are arranged at intervals along the length direction of the flame dividing plate 21, and first welding positions can be respectively provided on the plurality of partition portions 217 arranged along the length direction. Correspondingly, a plurality of first solder joints 31 are provided at intervals along the length direction of the metal mesh 30, and the first solder joints 31 are welded to the corresponding first welding positions. In this way, on the one hand, the welding stability between the metal mesh 30 and the flame dividing plate 21 can be ensured, and the metal mesh 30 can be prevented from falling off during the combustion process; on the other hand, a plurality of portions with relatively large air flow resistance are distributed at intervals along the length direction of the combustion head 200, so that a better flame stabilization effect can be generated in each region along the length direction of the combustion head 200.

[0055] In one embodiment, the first welding position is provided at the middle position in the width direction of the flame dividing plate 21.

[0056] In this embodiment, the middle position in the width direction of the flame dividing plate 21 can be understood as a position interval that floats a preset distance on both sides of the width center line of the flame dividing plate 21 as a reference line. For example, the first welding position can be set at the position on the width center line of the flame dividing plate 21, or the first welding position can be set at a position deviating from the width center line of the flame dividing plate 21 by a preset distance. The resistance of the first welding position is the largest and gradually decreases towards the periphery, so that the flame at the middle position of the flame dividing plate 21 can pull the surrounding flames, achieving a better flame stabilization effect.

[0057] In one embodiment, the partition portion 217 provided with the first welding position is circular or oval. In this way, the contact area between the first welding position and the metal mesh 30 can be increased, ensuring that the solder joints are firm and reliable. In some embodiments, the partition portion 217 can be formed at the intersection of the first rib 214 and the second rib 215. Optionally, setting the partition portion 217 as a circle is beneficial to improving the strength of the intersection of the two ribs and preventing the welding from breaking.

[0058] To further improve the flame uniformity, as Figure 8 and Figure 10 shown, in one embodiment, the metal mesh 30 is provided with multiple layers.

[0059] In this embodiment, using the multi-layer metal mesh 30 can further disperse air and gas, making the gas and air mix evenly. There is a certain gap between the metal meshes 30, which will neither completely block and cause an increase in resistance, nor can they block each other, avoiding the flame from easily extinguishing due to the direct blowing of the air flow through the fire holes. At the same time, it can also achieve a better anti-backfire effect.

[0060] In actual application, the number of layers of the wire mesh 30 is related to the mesh number of the wire mesh 30. For a wire mesh 30 with a larger mesh number, the corresponding number of layers is smaller; for a wire mesh 30 with a smaller mesh number, the corresponding number of layers is larger. For example, the number of layers of the wire mesh 30 can be 2 to 10 layers, specifically 2 layers, 3 layers, 4 layers, 5 layers, 6 layers, 7 layers, 8 layers, 9 layers or 10 layers. The mesh number of the wire mesh 30 can be from 20 mesh to 100 mesh, specifically 20 mesh, 40 mesh, 50 mesh, 60 mesh, 80 mesh or 100 mesh, etc. As an example, the wire mesh 30 can adopt 4 layers of mesh. As an example, the range of the mesh number of the wire mesh 30 can be selected between 20 mesh and 40 mesh.

[0061] Optionally, as Figure 10 shown, the multi-layer wire mesh 30 is welded by the first solder joints 31, that is, the multi-layer wire mesh 301 is fused together at the first solder joints 31, so that the multi-layer wire mesh 30 is pulled by the first solder joints 31. Then, the resistance at the first solder joints 31 is the largest, and the resistance gradually changes from the center position of the first solder joints 31 to the surrounding to the normal resistance of the multi-layer wire mesh 30 in the natural state, and the gas flow rate also gradually increases from the center position near the first solder joints 31 to the surrounding, achieving a better flame stabilization effect.

[0062] It can be understood that the wire mesh 30 can be located above or below the combustion nozzle 211, that is, the wire mesh 30 can be arranged on the combustion surface or the combustion back surface of the flame dividing plate 21. Among them, the combustion surface of the flame dividing plate 21 refers to the side of the flame dividing plate 21 away from the gas flow channel 101 of the burner row 1000, and the combustion back surface of the flame dividing plate 21 refers to the side of the flame dividing plate 21 facing the gas flow channel 101 of the burner row 1000. In actual application, since the flame burns above the combustion head 200, the requirements for heat resistance and strength of the wire mesh 30 located above the combustion nozzle 211 are higher than those located below the combustion nozzle 211. Considering factors such as cost and service life, optionally, the wire mesh 30 is arranged on the combustion back surface of the flame dividing plate 21, so that the wire mesh 30 is located below the combustion nozzle 211.

[0063] It can be understood that the gas flows at both ends of the combustion head 200 collide with the boundary wall surface and then flow out sharply upward, that is, the gas flow rate in the two end regions 21b of the flame dividing plate 21 is faster than that in the middle region 21a, and the problem of flame detachment and flashback is likely to occur in the two end regions 21b, which is not conducive to combustion stability.

[0064] To solve the above problems, as Figure 4As shown, in one embodiment, in the length direction of the flame distributing plate 21, the flame distributing plate 21 includes an intermediate region 21a and two end regions 21b respectively located at both ends of the intermediate region 21a; the opening area of a single combustion burner 211 located in the end region 21b is smaller than the opening area of a single combustion burner 211 located in the intermediate region 21a. In this way, the relatively small opening area of a single combustion burner 211 in the end region 21b is beneficial to increasing the air flow resistance in the end region 21b, thereby balancing the gas flow rate and velocity of the entire flame distributing plate 21, and avoiding flashback and flame detachment due to too fast gas velocity in the two end regions 21b, so as to further achieve the effect of stable combustion.

[0065] As Figures 5 to 7 shown, in some embodiments, the flame distributing plate 21 has a hollowed-out region, and the flame distributing plate 21 includes a first rib 214 and a second rib 215 disposed in the hollowed-out region. The first rib 214 and the second rib 215 are arranged in a cross pattern to divide the hollowed-out region into a plurality of combustion burners 211, and the cross portion of the first rib 214 and the second rib 215 forms a partition portion 217.

[0066] In this embodiment, the flame distributing plate 21 may include a surrounding frame and a first rib 214 and a second rib 215 disposed within the surrounding frame. The surrounding frame encloses a hollowed-out region. The first rib 214 and the second rib 215 are arranged in a cross pattern to divide the relatively large hollowed-out region into a plurality of relatively small combustion burners 211, which is beneficial to dispersing the air flow. And the air flow resistance can be increased at the rib portion, the air flow velocity can be reduced, and the flame stabilizing effect can be improved. The cross portion of the first rib 214 and the second rib 215 forms a partition portion 217, and at least part of the partition portion 217 is provided with a first welding position. That is to say, the first welding position is located at the cross portion of the first rib 214 and the second rib 215. The contact area with the metal mesh 30 can be increased through the cross portion, ensuring welding stability. Optionally, the cross portion of the first rib 214 and the second rib 215 is circularly arranged, which is beneficial to improving the strength of the cross portion of the two ribs and preventing welding breakage.

[0067] As Figure 6 and Figure 7 shown, in some embodiments, the first rib 214 extends along the width direction of the flame distributing plate 21, the second rib 215 extends along the length direction of the flame distributing plate 21, a plurality of first ribs 214 are arranged at intervals along the length direction of the flame distributing plate 21, and at least part of the second ribs 215 are provided between two adjacent first ribs 214.

[0068] In this embodiment, the first rib 214 is a longitudinal rib extending along the width direction of the flame dividing plate 21, and the second rib 215 is a transverse rib extending along the width direction of the flame dividing plate 21. The plurality of first ribs 214 divide the hollow area into a plurality of combustion areas arranged at intervals along the length direction of the flame dividing plate 21, and the second ribs 215 are provided between at least some adjacent first ribs 214. For example, any two adjacent first ribs 214 can be connected by a second rib 215; alternatively, the second rib 215 is not provided between some adjacent first ribs 214, and the second rib 215 is provided between some other adjacent first ribs 214. In this way, the combustion openings 211 on the flame dividing plate 21 have various arrangement forms.

[0069] For example, as Figure 7 shown, in one embodiment, the plurality of combustion openings 211 include a first combustion opening 211a and a second combustion opening 211b. Among them, the first combustion opening 211a is formed by enclosing two first ribs 214 and a second rib 215, and the second combustion opening 211b is formed by enclosing two first ribs 214.

[0070] Again, for example, as Figure 6 shown, in another embodiment, the plurality of combustion openings 211 include a third combustion opening 211c and a fourth combustion opening 211d. Among them, both the third combustion opening 211c and the fourth combustion opening 211d are formed by enclosing two first ribs 214 and a second rib 215.

[0071] Optionally, as Figure 6 shown, in one embodiment, the plurality of combustion openings 211 located in the middle area 21a of the flame dividing plate 21 are arranged to form at least one row of fire openings, and each row of fire openings includes the third combustion opening 211c and the fourth combustion opening 211d arranged alternately along the length direction of the flame dividing plate 21, and the opening area of the third combustion opening 211c is larger than the opening area of the fourth combustion opening 211d.

[0072] In this embodiment, a plurality of combustion ports 211 located in the middle region 21a of the flame dividing plate 21 can be arranged to form a single row, a double row or a multi-row of combustion port rows. Taking the single row of combustion port rows as an example, this row of combustion ports includes a number of third combustion ports 211c and fourth combustion ports 211d alternately arranged along the length direction of the flame dividing plate 21. The opening area of the third combustion port 211c is larger than that of the fourth combustion port 211d. In this way, a plurality of combustion units arranged alternately in a large and a small pattern can be formed in the length direction of the flame dividing plate 21, and the flame on the flame dividing plate 21 can be divided into large and small flames. Since the sizes of the flames are different, the boundary conditions of the wind speed during flame detachment and flame lift-off are also different. When a certain flame has a tendency of flame lift-off, the surrounding flames can hold it back to form a stable flame, so that the fire row 1000 has a wider adaptation range for the wind speed of the fan.

[0073] In one embodiment, at least two rows of combustion port rows are provided in the middle region 21a of the flame dividing plate 21. The at least two rows of combustion port rows include a first row of combustion ports and a second row of combustion ports adjacent to each other in the width direction of the flame dividing plate 21. Both the first row of combustion ports and the second row of combustion ports include third combustion ports 211c and fourth combustion ports 211d alternately arranged along the length direction of the flame dividing plate 21. The third combustion ports 211c in the first row of combustion ports are arranged opposite to the fourth combustion ports 211d in the second row of combustion ports.

[0074] As Figure 6 shown, taking two rows of combustion port rows as an example, they are the first row of combustion ports and the second row of combustion ports respectively. The first row of combustion ports can be arranged in the length direction of the flame dividing plate 21 according to the rule of third combustion port 211c, fourth combustion port 211d, third combustion port 211c, fourth combustion port 211d... The second row of combustion ports can be arranged in the length direction of the flame dividing plate 21 according to the rule of fourth combustion port 211d, third combustion port 211c, fourth combustion port 211d, third combustion port 211c... In this way, in the width direction of the flame dividing plate 21, the third combustion ports 211c in the first row of combustion ports are arranged opposite to the fourth combustion ports 211d in the second row of combustion ports. In this way, not only can a number of combustion units arranged alternately in a large and a small pattern be formed in the length direction of the flame dividing plate 21, but also a number of combustion units arranged alternately in a large and a small pattern can be formed in the width direction of the flame dividing plate 21, so that the flame on the flame dividing plate 21 can be divided into large and small flames along both its length direction and width direction, thereby forming a better stable flame effect, further improving the combustion stability and reducing the combustion noise.

[0075] As Figure 4As shown, in one embodiment, in the length direction of the flame dividing plate 21, the flame dividing plate 21 includes an intermediate region 21a and two end regions 21b located at both ends of the intermediate region 21a respectively; the arrangement density of the first ribs 214 in the intermediate region 21a is greater than that of the first ribs 214 in the end regions 21b.

[0076] In this embodiment, the arrangement density of the first ribs 214 in the end regions 21b is greater than that of the first ribs 214 in the intermediate region 21a, that is, in the unit area, the number of the first ribs 214 arranged in the end regions 21b is more, so that the opening area of a single combustion burner port 211 in the end regions 21b is smaller than that of a single combustion burner port 211 in the intermediate region 21a, so that the end regions 21b can increase the air flow resistance through more first ribs 214, thereby balancing the gas flow rate and velocity of the entire flame dividing plate 21, and avoiding flashback and flame lift at the two end regions 21b due to too fast gas flow velocity, so as to further achieve the effect of stable combustion.

[0077] As Figure 4 shown, in one embodiment, among the multiple second ribs 215 arranged in the length direction of the flame dividing plate 21, at least two adjacent second ribs 215 in the intermediate region 21a are arranged in a staggered manner in the width direction of the flame dividing plate 21.

[0078] In this embodiment, two adjacent second ribs 215 are arranged in a staggered manner, that is, the center lines of any two adjacent second ribs 215 are not on the same straight line. The second ribs 215 arranged in a staggered manner can make two adjacent combustion burner ports 211 in the same row form a staggered arrangement effect, so that several combustion units arranged in a large-small staggered interval are formed on the flame dividing plate 21. By such setting, the flame on the flame dividing plate 21 can be divided into large and small flames, and the large and small flames are staggered and separated. When a certain flame has a tendency of flame lift, the surrounding flames can hold it, and a better flame stabilizing effect can be formed, which is beneficial to further broaden the adaptation range of the burner 1000 to the fan air velocity.

[0079] As Figure 3 shown, in one embodiment, the flame dividing plate 21 has covering regions on both sides in the length direction of the hollowed-out region, the covering regions are provided with second welding positions, and both ends of the metal mesh 30 are respectively provided with second welding points 32 corresponding to the second welding positions, and the metal mesh 30 is welded to the second welding positions through the second welding points 32. In this way, both ends of the metal mesh 30 can be welded and fixed, further improving the welding stability between the metal mesh 30 and the flame dividing plate 21; and it can also avoid warping and deformation of both ends of the metal mesh 30 in a high-temperature environment, so as to ensure the flatness of the metal mesh 30.

[0080] AsFigure 5 As shown, in one embodiment, the combustion cover 20 further includes two side plates 22 respectively disposed on both sides of the width direction of the flame dividing plate 21, and both side plates 22 are bent towards the same side relative to the flame dividing plate 21.

[0081] In this embodiment, the cross-sectional shape of the combustion cover 20 is generally inverted U-shaped. The metal mesh 30 can be welded to the combustion back surface of the flame dividing plate 21 so that the metal mesh 30 is received between the two side plates 22. As Figure 2 shown, when assembling the combustion head 200 and the burner body 100, the two side plates 22 of the combustion cover 20 can be inserted into the air flow channel 101 of the burner body 100, and the side plates 22 are welded or riveted to the side wall of the burner body 100 for fixation. Among them, the two side plates 22 and the flame dividing plate 21 can be integrally bent from a single sheet metal plate, or can also be connected and fixed by welding, riveting or other means. For the sake of simplifying the manufacturing process, optionally, the combustion head 200 is a sheet metal part, the flame dividing plate 21 and the two side plates 22 are integrally bent, and then the corresponding combustion ports 211 are punched out on the flame dividing plate 21.

[0082] As Figure 6 and Figure 7 shown, in some embodiments, convex portions 216 and / or grooves are provided on the side edges of at least some of the combustion ports 211. By providing convex portions 216 and / or grooves on the side edges of the combustion ports 211, on the one hand, the contact surface between the flame and the surrounding air can be increased, making the combustion more complete, and on the other hand, the inner edge contour of the combustion port 211 can be further extended, thereby increasing the perimeter of the contact contour between the flame and the flame dividing plate 21 and making the flame more stable.

[0083] Generally, adjacent two combustion ports 211 are separated by the second rib 215 or the first rib 214, that is, the second rib 215 or the first rib 214 constitutes a part of the side edge of the combustion port 211. Considering that the widths of the second rib 215 and the first rib 214 are usually narrow, in order to avoid a great influence on their structural strength due to the opening of grooves, convex portions 216 can be selected to be provided on the edges of the second rib 215 and / or the first rib 214. In this way, while ensuring the structural strength, the inner edge contour of the combustion port 211 can be extended. In addition, when some of the combustion ports 211 are correspondingly provided with flanges 212, at this time, the flanges 212 can also be regarded as a part of the side edge of the combustion port 211, and convex portions 216 can also be selected to be provided on the flanges 212. The shape of the convex portion 216 can be designed as a hemispherical shape, a toothed shape or other shapes according to needs.

[0084] Exemplarily, as Figure 7As shown, in one embodiment, the flame distributing plate 21 is provided with a first combustion flame port 211a and a second combustion flame port 211b. The second combustion flame port 211b extends along the width direction of the flame distributing plate 21, and two convex portions 216 are respectively provided corresponding to the two long side edges of the second combustion flame port 211b. Exemplarily, as Figure 6 shown, in one embodiment, the flame distributing plate 21 is provided with alternately arranged third combustion flame ports 211c and fourth combustion flame ports 211d along the length direction. Among them, convex portions 216 are respectively provided corresponding to the opposite side edges of each third combustion flame port 211c. Of course, the setting form of the convex portion 216 is not limited to this. It is also possible that convex portions 216 are provided on the side edges of each combustion flame port 211. In addition, the number of convex portions 216 in a single combustion flame port 211 can be one, two or more. When the number of convex portions 216 in a single combustion flame port 211 is set to an even number, the even number of convex portions 216 can be symmetrically arranged or asymmetrically arranged.

[0085] Based on the above embodiments, as Figure 3 and Figure 5 shown, in one embodiment, flanges 212 are provided at positions corresponding to at least part of the combustion flame ports 211 on the side edge of the flame distributing plate 21. A notch 213 is formed between at least part of the flanges 212 and the side edges of the corresponding combustion flame ports 211. Part of the side edge of the metal mesh 30 is located at the bottom side of the flange 212.

[0086] In this embodiment, by leaving a notch 213 between the flange 212 and the side edge of the combustion flame port 211, the perimeter of the contact profile between the flame and the flame distributing plate 21 is increased, making the flame combustion more stable and reducing the combustion noise. In addition, the side edge of the metal mesh 30 is usually uneven, and when there are multiple layers of the metal mesh 30, the unevenness of the side edge is more obvious. If there is no flange 212, after the combustion head 200 and the metal mesh 30 are assembled, there will be problems such as large gaps and small gaps at the side edges, and the consistency is poor. Through the above flange 212 design, part of the side edge of the metal mesh 30 is located at the bottom side of the flange 212, that is, the part of the side edge of the flame distributing plate 21 where the flange 212 is provided just covers the uneven part of the side edge of the metal mesh 30, making the combustion area consistency of each row of fire 1000 more stable. In addition, the flange 212 design with a notch 213 can also reduce the influence of the flange 212 on the combustion area, ensure sufficient combustion area, and avoid the through flange 212 causing too much reduction in the combustion area resulting in an increase in CO and NOx in the flue gas. In this way, the combustion stability can be further improved, the combustion noise can be reduced, the emission of nitrogen oxides can be reduced, and low-nitrogen combustion can be achieved.

[0087] Exemplarily, a flanging 212 is provided at the position of the side edge of the flame dividing plate 21 corresponding to one of the combustion flame ports 211. The flanging 212 is located within the area enclosed by the combustion flame port 211. In the length direction of the flame dividing plate 21, the size of the flanging 212 is smaller than the size between the two opposite side edges of the combustion flame port 211, so that gaps 213 are formed between the two ends of the flanging 212 and the two side edges of the combustion flame port 211 respectively. Of course, it is also possible to extend one end of the flanging 212 to be connected to one side edge of the combustion flame port 211, and a gap 213 is formed between the other end of the flanging 212 and the other side edge of the combustion flame port 211. In actual application, the combustion flame port 211 with the flanging 212 can be directly stamped on the flame dividing plate 21 made of sheet metal through a stamping process, and a certain gap 213 is left between the flanging 212 and the side edge of the combustion flame port 211, which is simple and convenient to manufacture.

[0088] As Figure 1 and Figure 2 shown, the present utility model further provides a burner row 1000, which includes a burner row body 100 and a combustion head 200. The burner row body 100 is provided with an air flow channel 101 and an air outlet 103 communicated with the air flow channel 101; the combustion head 200 is installed at the air outlet 103. The specific structure of the combustion head 200 refers to the above embodiments. Since the burner row 1000 adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0089] In this embodiment, an air flow channel 101 for introducing gas and air is provided inside the burner row body 100. The two ends of the air flow channel 101 respectively have an air inlet 102 and an air outlet 103 penetrating the surface of the burner row body 100. Optionally, the air inlet 102 is arranged at a position near the lower part of the side of the burner row body 100, the air outlet 103 is arranged at the top of the burner row body 100, and the air flow channel 101 is arranged in a curved shape. The combustion head 200 is arranged at the air outlet 103 of the burner row body 100. The gas and air mixed in the air flow channel 101 are ejected through the air outlet 103 and burn at the combustion flame port 211 of the combustion head 200 to generate a flame. Optionally, the burner row body 100 is formed by splicing two substantially symmetrical sheet metal parts. After corresponding pressing of the two sheet metal parts, the air flow channel 101 is formed inside, and the air outlet 103 is formed at the top of the two sheet metal parts.

[0090] As Figures 1 to 3As shown, in one embodiment, the combustion cover 20 further includes two side plates 22 respectively disposed on both sides in the width direction of the flame distribution plate 21. The two side plates 22 are inserted into the air flow channel 101 and fixedly connected to the inner wall of the burner body 100. Lateral convex portions 104 are provided on both width sides of the burner body 100. A side air outlet channel communicating with the air flow channel 101 is formed between the lateral convex portions 104 and the side plates 22. One side of the side air outlet channel facing away from the air flow channel 101 is open to form a flame stabilizing port 105.

[0091] In this embodiment, during assembly, the combustion head 200 is placed into the air outlet 103 of the burner body 100, and then the two side plates 22 are respectively welded and fixed to the two half shells of the burner body 100. Through the cooperation between the combustion head 200 and the burner body 100, the part of the air outlet 103 of the burner body 100 can be separated into a main air outlet channel and side air outlet channels located on both sides of the main air outlet channel. In this way, the gas and air are fully mixed in the air flow channel 101 of the burner body 100 to form a mixed gas. The mixed gas is transported to the position of the combustion head 200 for splitting. A part of the mixed gas is transported through the main air outlet channel to the combustion ports 211 of the flame distribution plate 21 to burn and form a main flame, and another part of the mixed gas is output through the side air outlet channels on both sides and burns at the flame stabilizing port 105 to form side flames. The side flames on both sides can play a role in stabilizing the main flame on the flame distribution plate 21, further improving the combustion stability.

[0092] Optionally, a plurality of lateral convex portions 104 can be provided at intervals along the length direction at the position of the burner body 100 opposite to each side plate 22. The lateral convex portions 104 can be formed by stamping outward from the inner side of the burner body 100. A side air outlet channel is formed between each lateral convex portion 104 and the side plate 22. In addition, a recess recessed toward the side plate 22 is formed between any two adjacent lateral convex portions 104. This recess can just abut against the side plate 22 to form a welding position for welding the side plate 22 to the burner body 100.

[0093] The present utility model further proposes a gas device. This gas device includes a burner 1000. The specific structure of the burner 1000 refers to the above embodiment. Since this gas device adopts all the technical solutions of the above all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated one by one here.

[0094] As an example, the gas device can be a burner, such as an atmospheric burner, a rich-lean burner or a water-cooled burner and other forms of burners.

[0095] As an example, the gas device can also be a gas water heater, a boiler and other devices.

[0096] The above are only alternative embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A combustion head, characterized in that, Comprising: A combustion cover, including a flame dividing plate provided with a plurality of combustion ports arranged at intervals. A partition portion is formed between adjacent two of the combustion ports on the flame dividing plate, and at least part of the partition portion is provided with a first welding position; and A metal mesh, disposed on the combustion cover and covering a plurality of the combustion ports. The metal mesh is provided with first solder joints corresponding to the first welding positions, and the metal mesh is welded to the first welding positions through the first solder joints.

2. The combustion head according to claim 1, wherein, A plurality of the first welding positions are arranged along the length direction of the flame dividing plate, and a plurality of the first solder joints are arranged along the length direction of the metal mesh. The first solder joints are welded to the first welding positions one by one; And / or, the first welding position is arranged at the middle position in the width direction of the flame dividing plate.

3. The combustion head according to claim 1, characterized in that The partition portion provided with the first welding position is circular or oval in shape.

4. The combustion head according to claim 1, characterized in that, The metal mesh is provided with multiple layers; And / or, the metal mesh is disposed on the combustion back surface of the flame dividing plate.

5. The combustion head according to claim 1, wherein In the length direction of the flame dividing plate, the flame dividing plate includes a middle region and two end regions respectively located at both ends of the middle region; the opening area of a single combustion port located in the end region is smaller than the opening area of a single combustion port located in the middle region.

6. The combustion head according to claim 1, characterized in that, The flame dividing plate has a hollowed-out region. The flame dividing plate includes a first rib and a second rib disposed in the hollowed-out region. The first rib and the second rib are arranged in a cross shape to divide the hollowed-out region into a plurality of the combustion ports, and the cross portion of the first rib and the second rib forms the partition portion.

7. The combustion head according to claim 6, characterized in that, The first rib extends along the width direction of the flame dividing plate, the second rib extends along the length direction of the flame dividing plate, a plurality of the first ribs are arranged at intervals along the length direction of the flame dividing plate, and at least part of the second ribs are provided between adjacent two of the first ribs.

8. The combustion head according to claim 7, characterized in that, In the length direction of the flame dividing plate, the flame dividing plate includes a middle region and two end regions respectively located at both ends of the middle region; The arrangement density of the first ribs located in the middle region is greater than the arrangement density of the first ribs located in the end region; And / or, among the plurality of the second ribs arranged in the length direction of the flame dividing plate, at least in the middle region, adjacent two of the second ribs are arranged in a staggered manner in the width direction of the flame dividing plate.

9. The combustion head according to claim 6, characterized in that, The flame dividing plate has covering regions located on both sides in the length direction of the hollowed-out region. The covering regions are provided with second welding positions, and both ends of the metal mesh are respectively provided with second solder joints corresponding to the second welding positions. The metal mesh is welded to the second welding positions through the second solder joints.

10. The combustion head according to any one of claims 1 to 9, characterized in that, The side edge of the flame dividing plate is provided with a flanging at a position corresponding to at least part of the combustion ports. A notch is formed between at least part of the flanging and the side edge of the corresponding combustion port, and part of the side edge of the metal mesh is located at the bottom side of the flanging.

11. A burner, characterized in that, Comprising: A burner body, provided with an air flow channel and an air outlet communicated with the air flow channel; And The combustion head according to any one of claims 1 to 10, the combustion head being installed at the air outlet.

12. A gas equipment, characterized in that, Comprising the burner according to claim 11.

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