Burner array and combustion apparatus

Abstract

Disclosed in the present application are a burner array and a combustion apparatus. The burner array comprises: a burner array body, wherein an airflow channel is formed in the burner array body, combustion flame holes in communication with the airflow channel are disposed at the top of the burner array body, and side air output holes in communication with the airflow channel are disposed on a side portion of the burner array body; and a metal mesh, which is disposed on the burner array body, wherein the metal mesh is arranged corresponding to the combustion flame holes and the side air output holes.

Description

Fire briquette and combustion equipment

[0001] This application claims priority to Chinese patent application No. 202323354940.4 filed on December 4, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of combustion equipment, and in particular to a fire grate and combustion equipment. Background Art

[0003] The burner is a core component of gas equipment. Related technologies for low-NOx combustion in gas water heaters employ various technologies, including fully premixed combustion, rich-lean combustion, and water-cooled combustion. Traditional burner girders typically utilize a single-strip design. This structure, however, suffers from a small area and high intensity combustion, resulting in poor flue gas performance from transient combustion. This results in high NOx levels and fails to meet low-NOx emission requirements. Technical issues

[0004] The main purpose of this application is to propose a fire grate that aims to reduce the thermal intensity of the combustion fire holes, improve combustion uniformity and combustion stability, reduce nitrogen oxide emissions, and meet low nitrogen emission performance requirements. Technical Solutions

[0005] To achieve the above-mentioned purpose, the fire grate proposed in this application includes: a fire grate body and a metal mesh.

[0006] In one embodiment, an air flow channel is formed inside the fire bar body, a combustion fire hole connected to the air flow channel is provided on the top of the fire bar body, and a side air outlet hole connected to the air flow channel is provided on the side of the fire bar body.

[0007] In one embodiment, the metal mesh is provided on the fire bar body, and the metal mesh is provided corresponding to the combustion fire holes and the side air outlet holes.

[0008] In one embodiment, the metal mesh includes a top mesh sheet disposed opposite to the top of the fire bar body, and a side mesh sheet disposed opposite to the side of the fire bar body.

[0009] In one embodiment, the top mesh is arranged corresponding to the combustion fire hole, and the side mesh is arranged corresponding to the side air outlet hole.

[0010] In one embodiment, the number of layers of the top mesh is greater than the number of layers of the side mesh.

[0011] In one embodiment, the top mesh is integrally formed with the side mesh.

[0012] In one embodiment, a plurality of the combustion fire holes are provided, and the plurality of the combustion fire holes are spaced apart along the length direction of the fire bar body to form a plurality of fire hole groups.

[0013] In one embodiment, each group of the fire holes includes a first combustion fire hole and a second combustion fire hole, and the opening area of ​​the first combustion fire hole is different from the opening area of ​​the second combustion fire hole.

[0014] In one embodiment, the fire hole center of the first combustion fire hole and the fire hole center of the second combustion fire hole are staggered in the width direction of the fire bar body.

[0015] In one embodiment, at least some of the combustion holes have edges provided with protruding teeth.

[0016] In one embodiment, the fire bar body has a first side and a second side disposed opposite to each other along the length direction.

[0017] In one embodiment, the air flow channel includes an air inlet provided on the one side, an ejection section extending from the air inlet toward the second side, a curved section bending upward from an end of the ejection section away from the air inlet, and a diversion section extending from an end of the curved section away from the ejection section toward the first side.

[0018] In one embodiment, the combustion fire hole and the side air outlet are respectively connected to the diversion section, and a speed reduction structure is provided in the air flow channel at a corner corresponding to where the bending section is connected to the diversion section.

[0019] In one embodiment, the speed reduction structure includes a plurality of speed reduction convex bumps provided on the side wall of the fire bar body, and the speed reduction convex bumps protrude toward the air flow channel.

[0020] In one embodiment, the fire bar body includes a top plate and two side plates respectively provided on opposite sides of the top plate in a width direction.

[0021] In one embodiment, the two side panels extend toward the same side relative to the top panel, and the top panel and the two side panels together form the airflow channel.

[0022] In one embodiment, the top plate is provided with a plurality of the combustion fire holes, and each of the side plates is provided with a plurality of the side air outlet holes.

[0023] In one embodiment, the metal mesh is arranged on one side of the top plate and the two side plates close to the air flow channel.

[0024] In one embodiment, all the side air outlet holes on the side panel are arranged into at least two rows of air outlet holes along the height direction of the side panel.

[0025] In one embodiment, each row of the air outlet holes includes a plurality of the side air outlet holes spaced apart along the length direction of the side plate.

[0026] In one embodiment, at least one row of the air outlet holes includes first side air outlet holes and second side air outlet holes, and an opening area of ​​the first side air outlet holes is different from an opening area of ​​the second side air outlet holes.

[0027] In one embodiment, the plurality of side air outlet holes in two adjacent rows of air outlet holes are arranged in a staggered manner.

[0028] In one embodiment, the fire grate further includes a flame stabilizing device sleeved on the top of the fire grate body.

[0029] In one embodiment, the flame stabilizing device has a cavity with an open top, and a side air outlet channel is formed between the side wall of the cavity and each of the side panels. The side air outlet channel is connected to the side air outlet hole on the corresponding side panel, and the top of the side air outlet channel is open to form a flame stabilizing port.

[0030] The present application also provides a combustion device, comprising the fire bar as described above. Beneficial effects

[0031] The fire grate body of the present invention is equipped with a metal mesh, which is positioned corresponding to the combustion holes on the top and the side air outlets on the sides. The fine mesh of the metal mesh disperses the relatively large opening area of ​​the combustion holes on the top of the fire grate body into a number of smaller holes. This increases the burner area compared to the linear holes in traditional fire grates. Furthermore, the dispersed holes avoid the problem of locally high temperatures in the linear holes, resulting in a more uniform temperature across the combustion surface. This reduces the heat intensity of the holes and eliminates localized high temperatures, effectively suppressing the formation of nitrogen oxides (NOx), thereby achieving low-NOx combustion. The metal mesh also reduces the airflow velocity at the side air outlets on the sides of the fire grate body, slowing down and stabilizing the flame. Furthermore, the metal mesh prevents flashback. This reduces the heat intensity of the holes, improving combustion uniformity and stability, and reducing NOx emissions, thus meeting low-NOx emission requirements. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0033] FIG1 is a schematic structural diagram of an embodiment of a fire bar of the present application;

[0034] Figure 2 is a top view of the fire bar in Figure 1;

[0035] FIG3 is a side view of the fire bar in FIG1 ;

[0036] FIG4 is a schematic cross-sectional view of the fire bar in FIG1 ;

[0037] FIG5 is a schematic diagram of the assembly structure of the fire bar body and the metal mesh according to an embodiment of the present application;

[0038] FIG6 is a top view of the assembly structure of the fire bar body and the metal mesh in FIG5;

[0039] FIG7 is a schematic structural diagram of a metal mesh according to an embodiment of the present application;

[0040] FIG8 is a schematic structural diagram of a plurality of fire bars arranged side by side according to an embodiment of the present application.

[0041] Description of Figure Numbers:

[0042] Reference number name Reference number name 100 fire bar 121a first side air outlet 10 fire bar body 121b second side air outlet 101 air flow channel 122 deceleration convex 1011 air inlet 20 metal mesh 1012 introduction section 20a top mesh 1013 curved section 20b side mesh 1014 diversion section 30 flame stabilizing device 11 top plate 301 side air outlet channel 111 combustion fire hole 302 flame stabilizing port 111a first combustion fire hole 31 flame stabilizing plate 111b second combustion fire hole 311 notch 112 protruding tooth 312 side convex 12 side plate 3121 positioning convex 121 side air outlet 3122 inner convex

[0043] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. Modes for Carrying Out the Invention

[0044] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0045] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0046] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only 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 limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement it. When the combination of technical solutions is mutually 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 this application.

[0047] In the related art, the single-strip fire hole structure has a small fire hole area, a high burning fire hole intensity, and poor flue gas performance due to instantaneous combustion, resulting in high nitrogen oxides and failing to meet low nitrogen emission performance requirements.

[0048] The present application proposes a fire bar 100 .

[0049] Referring to Figures 1 to 6 , in one embodiment of the present application, a fire grate 100 includes a fire grate body 10 and a metal mesh 20. An airflow channel 101 is formed within the fire grate body 10. A combustion hole 111 communicating with the airflow channel 101 is provided at the top of the fire grate body 10. Side air outlet holes 121 communicating with the airflow channel 101 are provided on the sides of the fire grate body 10. The metal mesh 20 is disposed on the fire grate body 10, corresponding to the combustion hole 111 and the side air outlet holes 121.

[0050] The fire grate 100 is primarily used in burners. The fire grate body 10 is the main structure of the fire grate 100. The air inlet 1011 of the air flow channel 101 within the fire grate body 10 is connected to an air flow source, which includes air and gas. The gas and air enter the air flow channel 101 through the air inlet 1011. The gas and air are pre-mixed within the air flow channel 101, then flow out through the combustion holes 111 at the top of the fire grate body 10 and the side air outlets 121 on the side of the fire grate 100 and ignite, forming a combustion flame. It is understood that there are generally multiple combustion holes 111 at the top of the fire grate body 10. The multiple combustion holes 111 are arranged at intervals along the length of the fire grate body 10, which can function as a gas diversion. The mixed gas ignites at the combustion holes 111 to form the main flame. Multiple side air outlet holes 121 can be provided on the side of the fire grate body 10. These holes can be spaced apart along the length of the fire grate body 10, effectively diverting gas flow. The mixed gas flowing out of the side air outlet holes 121 can ignite at a location on the side of the fire grate body 10 near the combustion holes 111 (i.e., at the flame stabilization port 302), forming a side flame. In one embodiment, a plurality of side air outlet holes 121 are provided on opposite sides of the fire grate body 10 in the width direction. The side flames on both sides can stabilize the main flame at the top of the fire grate body 10, improving combustion stability. Furthermore, when multiple fire grate 100 of a burner are arranged side by side, the side flames on the sides of the fire grate body 10 also facilitate flame transfer between adjacent fire grate 100s.

[0051] As shown in Figure 4, the fire grate body 10 is provided with a metal mesh 20 at locations corresponding to the combustion holes 111 and the side air outlets 121. The metal mesh 20 can be located on the inner side of the fire grate body 10 (i.e., the side closest to the airflow channel 101). In this case, the mixed gas in the airflow channel 101 first passes through the metal mesh 20 before flowing to the combustion holes 111 and the side air outlets 121. Alternatively, the metal mesh 20 can be located on the outer side of the fire grate body 10 (i.e., the side facing away from the airflow channel 101). In this case, the mixed gas in the airflow channel 101 first passes through the combustion holes 111 and the side air outlets 121 before flowing to the metal mesh 20. When the metal mesh 20 is located on the outer side of the fire grate body 10, the combustion flames are primarily concentrated on the metal mesh 20, which is prone to reddening. Therefore, the metal mesh 20 has higher requirements for heat resistance and strength. Considering cost and other factors, it is preferable to place the metal mesh 20 on the inner side of the fire grate body 10. The metal mesh 20 and the fire bar body 10 are connected and fixed by methods including but not limited to welding, riveting, etc.

[0052] It is understood that the metal mesh 20 needs to cover both the combustion holes 111 at the top of the fire grate body 10 and the side air outlets 121 on the side of the fire grate 100. Therefore, the metal mesh 20 needs to be installed on both the top and side of the fire grate body 10. In actual application, a piece of metal mesh 20 can be bent into a "U"-shaped structure. Alternatively, the metal mesh 20 can be installed independently on the top and side of the fire grate body 10. The mesh size of the metal mesh 20 can be set according to actual needs. The mesh size of the metal mesh 20 located at the top of the fire grate body 10 can be the same as or different from the mesh size of the metal mesh 20 located on the side of the fire grate body 10. For example, the mesh size of the metal mesh 20 can range from 20 to 40, specifically 20, 30, 40, etc. For example, the mesh size of the metal mesh 20 can be 30. The number of layers of metal mesh 20 can be set to single or multiple layers according to actual needs. The number of layers of the metal mesh 20 located at the top of the fire bar body 10 can be the same as or different from the number of layers of the metal mesh 20 located on the sides of the fire bar body 10. In one embodiment, the number of layers of the metal mesh 20 located at the top of the fire bar body 10 (e.g., the top mesh 20a) can be 2 to 5; for example, the top mesh 20a can be 2, 3, 4, or 5 layers. The number of layers of the metal mesh 20 located on the sides of the fire bar body 10 (e.g., the side mesh 20b) can be 1 to 3; for example, the side mesh 20b can be 1, 2, or 3 layers.

[0053] The fire grate body 10 of the present invention is equipped with a metal mesh 20, which is positioned corresponding to the combustion holes 111 on the top and the side air outlets 121 on the side of the fire grate body 10. The fine mesh of the metal mesh 20 disperses the relatively large opening area of ​​the combustion holes 111 on the top of the fire grate body 10 into a number of smaller holes. This increases the burner area of ​​the fire grate 100 compared to the strip-shaped holes in conventional fire grate 100. Furthermore, the dispersed holes avoid the problem of locally high temperatures in strip-shaped holes, resulting in a more uniform temperature across the combustion surface of the fire grate 100. This reduces the heat intensity of the holes, eliminates localized high temperatures, and effectively suppresses the formation of nitrogen oxides (NOx), thereby achieving low-NOx combustion. Furthermore, the metal mesh 20 reduces the airflow velocity at the side air outlets 121 on the side of the fire grate body 10, slowing down the flow and stabilizing the flame. Furthermore, the metal mesh 20 prevents flashback. In this way, the fire bar 100 can reduce the heat intensity of the combustion fire holes 111, improve combustion uniformity and combustion stability, reduce nitrogen oxide emissions, and meet low nitrogen emission performance requirements.

[0054] Please refer to Figures 4 and 7. In one embodiment, the metal mesh 20 includes a top mesh 20a arranged opposite to the top of the fire bar body 10, and a side mesh 20b arranged opposite to the side of the fire bar body 10. The top mesh 20a is arranged corresponding to the combustion fire hole 111, and the side mesh 20b is arranged corresponding to the side air outlet 121. The number of layers of the top mesh 20a is greater than the number of layers of the side mesh 20b.

[0055] In one embodiment, considering that the combustion holes 111 at the top of the fire grate body 10 generally have a larger opening area, while the side air outlet holes 121 at the side of the fire grate body 10 have a relatively smaller opening area, the number of top mesh sheets 20a is set to be greater than the number of side mesh sheets 20b in order to more rationally distribute airflow and further improve combustion uniformity and stability. The combustion holes 111 at the top of the fire grate body 10 have a larger opening area and less airflow resistance. Providing a relatively large number of top mesh sheets 20a effectively disperses the airflow at the combustion holes 111, preventing localized airflow concentration and resulting high temperatures. This ensures a more uniform temperature across the combustion surface of the fire grate 100, reduces the heat intensity of the holes, and effectively suppresses the formation of nitrogen oxides (NOx), thereby achieving low-nitrogen combustion. The side vents have a relatively small opening area and relatively high resistance to airflow. By setting the side mesh 20b to have a relatively small number of layers, this can avoid excessive resistance to airflow at the side vents, which could prevent the side vents from being able to vent air smoothly. In one embodiment, the top mesh 20a has 2 to 5 layers, while the side mesh 20b has 1 to 3 layers. For example, when the side mesh 20b has 1 layer, the top mesh 20a can have any of 2 to 5 layers; when the side mesh 20b has 2 layers, the top mesh 20a can have any of 3 to 5 layers; and when the side mesh 20b has 3 layers, the top mesh 20a can have 4 or 5 layers. For example, the side mesh 20b has 1 layer and the top mesh 20a has 3 layers.

[0056] Among them, the top mesh 20a and the side mesh 20b can be provided as one piece or separately. In actual application, in order to simplify the manufacturing process and save costs, in one embodiment, as shown in Figure 7, the top mesh 20a and the side mesh 20b are provided as one piece. For example, during production, a metal mesh 20 with a larger area can be used and folded into a structure similar to a "U" shape through a preset folding method, and the number of layers of the top mesh 20a is greater than the number of layers of the side mesh 20b. Exemplarily, the top mesh 20a can be folded to form a three-layer structure, and the two side meshes 20b are single-layer structures.

[0057] As shown in Figure 6, in one embodiment, a plurality of combustion fire holes 111 are provided, and the plurality of combustion fire holes 111 are arranged at intervals along the length direction of the fire bar body 10 to form a plurality of fire hole groups, each of the fire hole groups includes a first combustion fire hole 111a and a second combustion fire hole 111b, and the opening area of ​​the first combustion fire hole 111a is different from the opening area of ​​the second combustion fire hole 111b.

[0058] In one embodiment, a plurality of combustion holes 111 are provided on the top of the fire bar body 10. The plurality of combustion holes 111 are arranged at intervals along the length direction of the fire bar body 10 to form a plurality of fire hole groups, which can divide the top surface of the fire bar body 10 into a plurality of combustion units along the length direction, so that the combustion is more uniform. Each fire hole group includes a first combustion hole 111a and a second combustion hole 111b. The opening area of ​​the first combustion hole 111a is different from the opening area of ​​the second combustion hole 111b. When each combustion unit burns, it can form flames of different sizes that match each other. Due to the different sizes of the flames, the boundary conditions of the wind speed when the flame is out of flame are also different. When a flame has a tendency to leave the flame, the surrounding flames can be pulled to form a stable flame. The fire bar 100 has a wider range of adaptability to the wind speed of the fan.

[0059] It is worth noting that each group of fire holes includes a first combustion fire hole 111a and a second combustion fire hole 111b, wherein the specific shapes of the first combustion fire hole 111a and the second combustion fire hole 111b are not limited, for example, they can be strip-shaped, square, circular, trapezoidal or other regular or irregular shapes. Exemplarily, the first combustion fire hole 111a is a strip-shaped hole extending along the width direction of the fire bar body 10, and the second combustion fire hole 111b includes two sub-combustion fire holes arranged at intervals along the width direction of the fire bar body 10. The arrangement rules of the fire holes of two adjacent groups of fire holes can be the same or different. Exemplarily, the top of the fire bar body 10 has a middle area along the length direction, and two end areas located at both ends of the middle area. Each group of fire holes located in the middle area includes two second combustion fire holes 111b and a first combustion fire hole 111a located between the two second combustion fire holes 111b. The fire hole group located in the end area includes a first combustion fire hole 111a and two second combustion fire holes 111b arranged on one side of the first combustion fire hole 111a near the middle area. The opening area of ​​the first combustion fire hole 111a is smaller than the opening area of ​​the second combustion fire hole 111b.

[0060] As shown in FIG. 6 , in one embodiment, the centers of the first combustion holes 111 a and the centers of the second combustion holes 111 b are staggered in the width direction of the fire bar body 10 .

[0061] It should be noted that when the combustion fire hole 111 (e.g., the first combustion fire hole 111a) is a single-hole structure, the combustion fire hole 111 has only one fire hole center; when the combustion fire hole 111 (e.g., the second combustion fire hole 111b) is a multi-hole structure formed by a combination of multiple sub-combustion fire holes, each sub-combustion sub-hole of the combustion fire hole 111 has a fire hole center, and the combustion fire hole 111 with a multi-hole structure has multiple fire hole centers. For example, in one embodiment, the first combustion fire hole 111a is a strip-shaped hole extending along the width direction of the fire bar body 10, and the fire hole center of the first combustion fire hole 111a is substantially located on the width center line of the fire bar body 10; the second combustion fire hole 111b includes two sub-combustion fire holes 111 spaced apart along the width direction of the fire bar body 10, and the fire hole centers of the two sub-combustion fire holes 111 are respectively located on either side of the width center line of the fire bar body 10. The centers of the first combustion fire holes 111 a and the second combustion fire holes 111 b are staggered in the width direction of the fire bar body 10 .

[0062] In one embodiment, the centers of the first combustion holes 111a and the second combustion holes 111b are staggered across the width of the fire bar body 10. A plurality of combustion holes 111, one large and one small, are staggered and spaced apart on the top of the fire bar body 10. This arrangement divides the flame into two flames, one large and one small, and the staggered separation of the large and small flames allows the surrounding flames to hold one flame back if it threatens to break away, resulting in a better flame stabilization effect and further broadening the fire bar 100's adaptability to fan speeds.

[0063] As shown in Figure 6, in one embodiment, at least some of the combustion holes 111 are provided with protruding teeth 112 along their edges. For example, at least one protruding tooth 112 is provided along the edge of the first combustion hole 111a and / or the second combustion hole 111b. Providing protruding teeth 112 along the edges of the combustion holes 111 can, on the one hand, increase the contact surface between the flame and the surrounding air, ensuring more complete combustion; on the other hand, it can extend the inner edge profile of the combustion holes 111, thereby increasing the circumference of the contact profile between the flame and the periphery of the holes and making the flame more stable; and, still another, the protruding teeth 112 can disperse the airflow, preventing the flame from concentrating and burning, thereby generating localized high temperatures.

[0064] In one embodiment, the first combustion fire hole 111a is provided with protruding teeth 112 on both side edges in the width direction of the fire bar body 10. In this way, the flames on both sides of the first combustion fire hole 111a are more likely to contact the secondary air on both sides of the fire bar body 10, and the combustion is more complete. In one embodiment, the second combustion fire hole 111b includes two sub-combustion fire holes spaced apart along the width direction of the fire bar body 10, and each of the sub-combustion fire holes is provided with protruding teeth 112 on both side edges in the width direction of the fire bar body 10. By setting the second combustion fire hole 111b as two sub-combustion fire holes spaced apart in the width direction of the fire bar body 10, it is possible to further divert and disperse the air and gas mixture. At the same time, the two sub-combustion fire holes are provided with protruding teeth 112 on both side edges in the width direction of the fire bar body 10, which can further increase the contact area between the gas and the secondary air, make the combustion more complete, and improve the uniformity of the flame.

[0065] As shown in Figure 1, in one embodiment, the fire bar body 10 has a first side and a second side arranged opposite to each other along the length direction, and the air flow channel 101 includes an air inlet 1011 provided on the one side, an introduction section 1012 extending from the air inlet 1011 toward the second side, a curved section 1013 bending upward from one end of the introduction section 1012 away from the air inlet 1011, and a diversion section 1014 extending from one end of the curved section 1013 away from the introduction section 1012 toward the first side, the combustion fire hole 111 and the side air outlet 121 are respectively connected to the diversion section 1014, and a speed reduction structure is provided at the corner portion of the air flow channel 101 corresponding to the connection between the curved section 1013 and the diversion section 1014.

[0066] In one embodiment, the airflow channel 101 includes an air inlet 1011, an ejection section 1012, a curved section 1013, and a diverter section 1014, which are interconnected in sequence. The airflow source (gas and air) enters the ejection section 1012 through the air inlet 1011, where it is fully mixed. The airflow is then transported through the curved section 1013 to the diverter section 1014, where it is then transported to the combustion holes 111 and the side air outlets 121. Typically, the airflow velocity at the corner where the curved section 1013 and the diverter section 1014 are connected is relatively fast, which can easily lead to uneven distribution of the combustion gas. By providing a deceleration structure at the corner where the curved section 1013 and the diverter section 1014 are connected in the airflow channel 101, the deceleration structure can increase the airflow resistance at the corner, thereby reducing the airflow velocity at the corner, so that the combustion gas flowing out of the diverter section 1014 is evenly distributed, thereby ensuring that the combustion at each part of the fire grate body 10 is more uniform and sufficient, which is conducive to achieving low-nitrogen combustion, stable flue gas emission performance, and high consistency. Among them, there are many specific ways to form a deceleration structure in the airflow channel 101. For example, the deceleration structure can be integrally formed in the fire grate body 10; or the deceleration structure can also be connected and fixed to the fire grate body 10 using an independent component. As long as it is ensured that the deceleration structure can play a deceleration role on the airflow at the corner of the airflow channel 101, it will be sufficient.

[0067] To simplify the manufacturing process and reduce costs, as shown in Figure 1, in one embodiment, the deceleration structure includes a plurality of deceleration bumps 122 provided on the side walls of the fire bar body 10, wherein the deceleration bumps 122 protrude toward the airflow channel 101. In actual production, the deceleration bumps 122 can be directly pressed inwardly on the outer wall of the fire bar body 10 corresponding to the corner of the airflow channel 101, which simplifies the process and facilitates manufacturing. The number of deceleration bumps 122 can be set to one or more according to actual needs. In one embodiment, deceleration bumps 122 are respectively provided on opposite sides of the width direction of the fire bar body 10, thereby achieving a better deceleration effect and making the combustion gas distribution more uniform. For example, two deceleration bumps 122 are respectively provided on opposite sides of the width direction of the fire bar body 10, spaced apart along the length direction of the fire bar body 10.

[0068] On the basis of any of the above embodiments, as shown in Figures 4 to 6, in one embodiment, the fire bar body 10 includes a top plate 11, and two side plates 12 respectively arranged on opposite sides of the width direction of the top plate 11, the two side plates 12 extend toward the same side relative to the top plate 11, the top plate 11 and the two side plates 12 enclose the airflow channel 101, the top plate 11 is provided with a plurality of the combustion fire holes 111, and each of the side plates 12 is provided with a plurality of the side air outlet holes 121, and the metal mesh 20 is provided on one side of the top plate 11 and the two side plates 12 close to the airflow channel 101.

[0069] This embodiment illustrates the structure of the fire bar body 10. The fire bar body 10 includes two side panels 12 and a top panel 11. The two side panels 12 can be connected by riveting or welding to form an airflow channel 101 therebetween. The top panel 11 can be integral with the two side panels 12 or separate. Multiple combustion holes 111 are provided on the top panel 11. The air and gas mixture within the airflow channel 101 can flow out through the multiple combustion holes 111 on the top panel 11 and be ignited. Each side panel 12 is provided with a side outlet 121, allowing the mixed gas within the airflow channel 101 to be diverted at the side panels 12. In actual applications, the combustion holes 111 can be stamped out of the top panel 11.

[0070] The metal mesh 20 specifically includes a top mesh sheet 20a stacked with the top plate 11 and a side mesh sheet 20b stacked with the side plates 12. The top mesh sheet 20a can be located on the inside or outside of the top plate 11, and the side mesh sheet 20b can be located on the inside or outside of the side plates 12. The inside of the top plate 11 refers to the side of the top plate 11 near the airflow channel 101, i.e., below the top plate 11. The inside of the side plates 12 refers to the side of the side plates 12 near the airflow channel 101, i.e., the side of the side plates 12 facing the other side plates 12. When the metal mesh 20 is located outside the fire bar body 10, the combustion flames are primarily concentrated on the metal mesh 20, and the metal mesh 20 is prone to reddening. Therefore, the metal mesh 20 has high heat resistance and strength requirements. In this embodiment, considering factors such as the lifespan and cost of the metal mesh 20, as an example, the metal mesh 20 is located on the side of the top plate 11 and both side plates 12 near the airflow channel 101.

[0071] As shown in Figure 5, in one embodiment, all the side air outlet holes 121 on the side panel 12 are arranged into at least two rows of air outlet holes along the height direction of the side panel 12, and each row of the air outlet holes includes a plurality of the side air outlet holes 121 arranged at intervals along the length direction of the side panel 12.

[0072] In one embodiment, the multiple side air outlet holes 121 on the side panel 12 are spaced apart along its height to form at least two rows, for example, two, three, or more rows. For example, all side air outlet holes 121 on the side panel 12 are arranged along the height of the side panel 12 into two rows. The airflow velocity of the side air outlet holes 121 in the lower row is relatively high, while the airflow velocity of the side air outlet holes 121 in the upper row is relatively low. There is a certain speed difference between the side air outlet holes 121 in each row, which can better adapt to different combustion conditions. Each row of air outlet holes includes multiple side air outlet holes 121 spaced apart along the length of the side panel 12. The airflow within the airflow channel 101 can enter the side air outlet channel 301 through the multiple side air outlet holes 121, increasing the air output and more evenly distributing the combustion gas. The shape of the side air outlet holes 121 can be configured according to actual needs, including but not limited to circular holes, strip holes, square holes, triangular holes, or other special-shaped holes. The shapes of the multiple side air outlet holes 121 in the same row can be the same or different, and the shapes of the multiple side air outlet holes 121 in different rows can be the same or different. For example, the multiple side air outlet holes 121 in the upper row of air outlet holes are all circular holes; the multiple side air outlet holes 121 in the lower row of air outlet holes include circular holes and strip-shaped holes.

[0073] As shown in FIG5 , in one embodiment, at least one row of the air outlet holes includes a first side air outlet hole 121 a and a second side air outlet hole 121 b , and the opening area of ​​the first side air outlet hole 121 a is different from the opening area of ​​the second side air outlet hole 121 b .

[0074] In one embodiment, the multiple side air outlet holes 121 of at least one exhaust hole row include two side air outlet holes 121 with different opening areas. For example, the opening area of ​​the first side air outlet hole 121a is smaller than the opening area of ​​the second side air outlet hole 121b. For example, the first side air outlet hole 121a can be a circular hole; the second side air outlet hole 121b can be a strip hole extending along the length direction of the fire bar body 10. The smaller opening area of ​​the first side air outlet hole 121a is conducive to the effect of reducing the speed of the airflow; while the relatively larger opening area of ​​the second side air outlet hole 121b is conducive to the rapid passage of the airflow. By matching the side air outlet holes 121 with two different opening areas, it is beneficial to adjust the airflow speed, so that the combustion gas is distributed more evenly, and the combustion is more uniform.

[0075] As shown in Figure 5, in one embodiment, the side air outlet holes 121 in two adjacent rows are arranged in a staggered arrangement. That is, along the length of the fire bar body 10, the side air outlet holes 121 in two adjacent rows are staggered, with at least some of the side air outlet holes 121 in one row corresponding to the gap between two adjacent side air outlet holes 121 in the other row. This allows the side airflow to enter the side air outlet channel 301 more evenly, resulting in a more uniform and stable flame.

[0076] Please refer to Figures 2 to 4. In one embodiment, the fire bar 100 also includes a flame stabilizing device 30 mounted on the top of the fire bar body 10. The flame stabilizing device 30 has a cavity with an open top. A side air outlet channel 301 is formed between the side wall of the cavity and each of the side panels 12. The side air outlet channel 301 is connected to the side air outlet hole 121 on the corresponding side panel 12. The top of the side air outlet channel 301 is open to form a flame stabilizing port 302.

[0077] In this embodiment, a flame stabilizing device 30 is provided on the upper part of the fire bar body 10, and a side air outlet channel 301 is formed between the cavity of the flame stabilizing device 30 and the side panel 12 of the fire bar body 10. By opening a plurality of side air outlet holes 121 on the side panel 12, part of the gas in the air flow channel 101 can enter the side air outlet channel 301 through the side air outlet holes 121, and flow out from the flame stabilizing port 302 on the top surface and burn to form a side flame, which can increase the air outlet volume of the fire bar 100 and make the combustion flame more stable.

[0078] As an example, as shown in FIG4 , the flame stabilizing device 30 includes two flame stabilizing plates 31 disposed on the outside of the two side panels 12. The two flame stabilizing plates 31 can be welded or riveted to the corresponding side panels 12, and a side air outlet channel 301 is formed between each flame stabilizing plate 31 and the corresponding side panel 12. As can be understood, the two flame stabilizing plates 31 extend upward and protrude from the top of the fire grate body 10, and can play the role of flame guidance and stabilization, so that the side flames are gathered toward the target area of ​​the fire grate 100, which is conducive to improving the heat accumulation effect during the combustion process.

[0079] Referring to Figures 1, 2, and 8, in one embodiment, the two flame-stabilizing plates 31 are each provided with a plurality of lateral projections 312 spaced apart along the length of the side panels 12. As will be appreciated, the fire bar 100 structure comprises a plurality of fire bar bodies 10 connected side by side, each of which is provided with a flame-stabilizing device 30 on its upper portion. In this embodiment, by providing the flame-stabilizing plates 31 with a plurality of lateral projections 312, the flame-stabilizing plates 31 can serve to position adjacent fire bar bodies 10 or increase the secondary air supply.

[0080] Specifically, the multiple lateral convex bumps 312 include multiple positioning convex bumps 3121 facing away from the cavity and / or multiple inner convex bumps 3122 recessed toward the side panel 12. It can be understood that the positioning convex bumps 3121 are provided for the flame stabilizing plate 31 to protrude outward. At this time, the adjacent flame stabilizing plates 31 of two adjacent fire bar bodies 10 are positioned and supported by the multiple positioning convex bumps 3121. The gaps between adjacent fire bar 100 cells are consistent, ensuring the supply of secondary air. The inner convex bumps 3122 are formed by the flame stabilizing plate 31 being recessed toward the side panel 12, which can increase the flow area of ​​the secondary air supply between adjacent fire bar 100 cells and further increase the supply of secondary air. In one embodiment, the inner convex bumps 3122 may include a pressed tooth structure or a pull-through pressed structure.

[0081] Furthermore, as shown in Figure 1 , the upper edge of the flame stabilizing plate 31 is provided with a plurality of notches 311. In this embodiment, by providing the plurality of notches 311 on the upper edge of the flame stabilizing plate 31, the generation of eddy currents can be reduced, airflow resistance can be lowered, and flame combustion stability can be enhanced. In one embodiment, the plurality of notches 311 can be spaced apart along the length of the flame stabilizing plate 31.

[0082] The present application also proposes a combustion device, which includes a fire bar 100. The specific structure of the fire bar 100 refers to the above embodiment. Since the combustion device adopts all the technical solutions of all the above embodiments, it has at least all the effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0083] As an example, the combustion device may be a burner, such as an atmospheric burner, a rich-lean burner, a water-cooled burner or other types of burners.

[0084] As an example, the combustion equipment may also be a gas water heater, boiler or other equipment.

[0085] The above description is merely an optional embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made using the contents of the present application specification and drawings under the inventive concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A fire briquette, wherein: The fire row comprises: A fire bar body, wherein an air flow channel is formed inside the fire bar body, a combustion fire hole communicating with the air flow channel is disposed on the top of the fire bar body, and a side air outlet hole communicating with the air flow channel is disposed on the side of the fire bar body; and A metal mesh is arranged on the fire grate body, and the metal mesh is arranged corresponding to the combustion fire holes and the side air outlet holes.

2. The fire bar according to claim 1, wherein: The metal mesh includes a top mesh sheet arranged opposite to the top of the fire bar body, and a side mesh sheet arranged opposite to the side of the fire bar body, the top mesh sheet is arranged corresponding to the combustion fire holes, the side mesh sheet is arranged corresponding to the side air outlet holes, and the number of layers of the top mesh sheet is greater than the number of layers of the side mesh sheet.

3. The fire bar according to claim 2, wherein: The top mesh is integrally arranged with the side mesh.

4. The fire bar according to any one of claims 1 to 3, wherein: There are multiple combustion fire holes, which are arranged at intervals along the length direction of the fire row body to form multiple groups of fire holes. Each group of fire holes includes a first combustion fire hole and a second combustion fire hole. The opening area of ​​the first combustion fire hole is different from the opening area of ​​the second combustion fire hole.

5. The fire bar according to claim 4, wherein: The fire hole center of the first combustion fire hole and the fire hole center of the second combustion fire hole are arranged in a staggered manner in the width direction of the fire bar body; And / or, at least some of the combustion holes have protruding teeth on their edges.

6. The fire bar according to any one of claims 1 to 5, wherein: The fire bar body has a first side and a second side arranged opposite to each other along the length direction, the air flow channel includes an air inlet arranged on the one side, an introduction section extending from the air inlet toward the second side, a curved section bending upward from an end of the introduction section away from the air inlet, and a diversion section extending from an end of the curved section away from the introduction section toward the first side, the combustion fire hole and the side air outlet are respectively connected to the diversion section, and a speed reduction structure is provided in the air flow channel at a corner corresponding to the curved section and the diversion section.

7. The fire bar according to claim 6, wherein: The speed reduction structure includes a plurality of speed reduction convex bumps arranged on the side wall of the fire bar body, and the speed reduction convex bumps protrude toward the air flow channel.

8. The fire bar according to any one of claims 1 to 7, wherein: The fire bar body includes a top plate, and two side plates respectively arranged on opposite sides of the top plate in the width direction, the two side plates are extended toward the same side relative to the top plate, the top plate and the two side plates are enclosed to form the airflow channel, the top plate is provided with a plurality of the combustion fire holes, each of the side plates is provided with a plurality of the side air outlet holes, and the metal mesh is arranged on one side of the top plate and the two side plates close to the airflow channel.

9. The fire bar according to claim 8, wherein: All of the side air outlet holes on the side plate are arranged into at least two air outlet rows along the height direction of the side plate, and each of the air outlet rows includes a plurality of the side air outlet holes arranged at intervals along the length direction of the side plate.

10. The fire bar according to claim 9, wherein: At least one of the rows of air outlet holes comprises a first side air outlet hole and a second side air outlet hole, and an opening area of ​​the first side air outlet hole is different from an opening area of ​​the second side air outlet hole; And / or, the plurality of side air outlet holes in two adjacent rows of air outlet holes are arranged in a staggered manner.

11. The fire bar according to any one of claims 8 to 10, wherein: The fire bar also includes a flame stabilizing device mounted on the top of the fire bar body, the flame stabilizing device having a cavity with an open top, a side air outlet channel formed between the side wall of the cavity and each of the side panels, the side air outlet channel being connected to the side air outlet holes on the corresponding side panels, and the top of the side air outlet channel being open to form a flame stabilizing port.

12. A combustion device, wherein: The combustion device comprises a fire bar as claimed in any one of claims 1 to 11.

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