Bar burner and combustion device

Abstract

The present application discloses a bar burner and a combustion device. The bar burner comprises: a bar burner body, a gas flow channel being formed inside the bar burner body, the bar burner body being provided with a top plate, and the top plate being provided with a plurality of combustion flame holes communicated with the gas flow channel; a metal mesh provided on one side of the top plate and arranged corresponding to the plurality of combustion flame holes; and a distribution and flame stabilizing piece provided in the gas flow channel, the distribution and flame stabilizing piece being provided with a plurality of distribution holes communicated with the plurality of combustion flame holes.

Description

Fire briquette and combustion equipment

[0001] This application claims priority to Chinese patent application No. 202323354720.1 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 the core component of gas equipment. In the related art, the burner of gas water heater adopts full premixed combustion technology, rich-lean combustion technology and water-cooled combustion technology in low-NOx combustion. 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, a metal mesh, and a diversion and flame stabilizing member.

[0006] In one embodiment, an air flow channel is formed inside the fire bar body.

[0007] In one embodiment, the fire bar body has a top plate, and the top plate is provided with a plurality of combustion fire holes communicating with the air flow channel.

[0008] In one embodiment, the metal mesh is arranged on one side of the top plate and is arranged corresponding to the plurality of combustion fire holes.

[0009] In one embodiment, the diverter flame stabilizing element is arranged in the air flow channel.

[0010] In one embodiment, the diverter flame-stabilizing member is provided with a plurality of diverter holes connected to a plurality of the combustion fire holes.

[0011] In one embodiment, the metal mesh has multiple layers.

[0012] In one embodiment, the plurality of combustion fire holes are spaced apart along the length direction of the top plate to form a plurality of fire hole groups, and the plurality of fire hole groups include a middle fire hole group located in the middle area of ​​the top plate, and two end fire hole groups located in the two end areas of the top plate respectively.

[0013] In one embodiment, the metal mesh includes a middle mesh sheet corresponding to the middle fire hole group, and two end mesh sheets respectively corresponding to the two end fire hole groups, and the number of layers of the end mesh sheets is greater than the number of layers of the middle mesh sheets.

[0014] In one embodiment, the plurality of combustion fire holes are spaced apart and arranged along the length direction of the top plate to form a plurality of fire hole groups, and each of the fire hole groups includes a first combustion fire hole and a second combustion fire hole.

[0015] In one embodiment, the opening area of ​​the first combustion fire hole is different from the opening area of ​​the second combustion fire hole.

[0016] 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 top plate.

[0017] In one embodiment, at least some of the combustion holes have edges provided with protruding teeth.

[0018] In one embodiment, a rib is provided on the top of the diverter flame-stabilizing member for separating any two adjacent diverter holes.

[0019] In one embodiment, the projection of the ribs toward the top plate is at least partially located within the area enclosed by the combustion holes.

[0020] In one embodiment, the fire bar body has a first side and a second side disposed opposite to each other along the length direction.

[0021] 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.

[0022] In one embodiment, the diversion section is connected to the plurality of combustion fire holes, 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.

[0023] In one embodiment, the diverter and flame-stabilizing member includes a first diverter and flame-stabilizing plate provided with a plurality of the diverter holes.

[0024] In one embodiment, the first flow diversion and flame stabilization plate is located below the top plate, and a concave cavity is provided on a side of the first flow diversion and flame stabilization plate facing the top plate.

[0025] In one embodiment, the metal mesh is located between the top plate and the first splitter and flame-stabilizing plate.

[0026] In one embodiment, the metal mesh is located on a side of the top plate facing away from the first splitter and flame-stabilizing plate.

[0027] In one embodiment, the metal mesh is located between the top plate and the first splitter and flame-stabilizing plate.

[0028] In one embodiment, the side edge of the first flow diverter and flame stabilizing plate abuts against the metal mesh, and the middle area of ​​the first flow diverter and flame stabilizing plate is recessed toward a side away from the metal mesh to form the cavity.

[0029] In one embodiment, the fire bar body further includes two side panels provided on both sides of the top plate in the width direction, and both side panels extend downward relative to the top plate, forming the air flow channel between the two side panels.

[0030] In one embodiment, the diverter flame-stabilizing component further includes two second diverter flame-stabilizing plates respectively arranged on both sides of the first diverter flame-stabilizing plate in the width direction, and the two second diverter flame-stabilizing plates are arranged on the inner sides of the two side plates in a one-to-one correspondence.

[0031] In one embodiment, each of the side panels is provided with a side air outlet, and a side diversion channel connected to the airflow channel is formed between each of the second diversion flame-stabilizing plates and its corresponding side panel, and the side diversion channel is connected to the side air outlet on the corresponding side panel.

[0032] In one embodiment, a bottom diversion opening is formed between the lower side edge of the second diversion and flame-stabilizing plate and the corresponding side plate, and the airflow channel is connected with the side diversion channel via the bottom diversion opening.

[0033] In one embodiment, the second diversion and flame-stabilizing plate is provided with a side diversion port, and the airflow channel is communicated with the side diversion channel via the side diversion port.

[0034] In one embodiment, the second splitter and flame-stabilizing plate includes an abutting portion abutting against the corresponding side plate, and a recessed portion recessed relative to the abutting portion toward a side away from the side plate.

[0035] In one embodiment, the side diversion channel is formed between the recessed portion and the corresponding side plate, the recessed portion is provided with a side diversion opening, and the airflow channel is connected to the side diversion channel via the side diversion opening.

[0036] In one embodiment, the fire grate further includes a flame stabilizing device sleeved on the top of the fire grate body.

[0037] In one embodiment, the flame stabilizing device has a cavity with an open top, and a side gas outlet channel is formed between the side wall of the cavity and each of the side plates.

[0038] In one embodiment, the side air outlet channel is connected to the side air outlet hole on the corresponding side plate, and the top of the side air outlet channel is open to form a flame stabilizing port.

[0039] The present application also provides a combustion device, comprising the fire bar as described above. Beneficial effects

[0040] The fire grate body of the technical solution of the present application is equipped with a metal mesh and a diverter flame-stabilizing member. An airflow channel is formed inside the fire grate body, and a plurality of combustion holes connected to the airflow channel are provided on the top of the fire grate body. The metal mesh is provided on the fire grate body and is arranged corresponding to the plurality of combustion holes. The diverter flame-stabilizing member is provided in the airflow channel, and the diverter flame-stabilizing member is provided with a plurality of diverter holes connected to the plurality of combustion holes. The airflow in the airflow channel is first diverted by the plurality of diverter holes of the diverter flame-stabilizing member, and then flows to the metal mesh and the plurality of combustion holes on the top of the fire grate body, which is conducive to reducing the airflow velocity, making the airflow distribution more uniform, and improving the uniformity of combustion. In addition, the fine mesh of the metal mesh can disperse the combustion holes with a large opening area on the top of the fire grate body into a plurality of small fire holes. Compared to the linear fire holes of traditional fire grates, this increases the burner area. Furthermore, it disperses the fire holes, avoiding the problem of locally high temperatures in these holes. This results in a more uniform temperature across the combustion surface, lowering the heat intensity of the holes and the height of the flames, thus avoiding localized high temperatures. This effectively suppresses the formation of nitrogen oxides (NOx), thereby achieving low-NOx combustion. Furthermore, the metal mesh prevents flashback. This allows the fire grate to reduce the heat intensity of the burning holes, improve combustion uniformity and stability, and reduce NOx emissions, thus meeting low-NOx emission requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] 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.

[0042] FIG1 is a schematic structural diagram of an embodiment of a fire bar of the present application;

[0043] Figure 2 is a top view of the fire bar in Figure 1;

[0044] FIG3 is a side view of the fire bar in FIG1 ;

[0045] FIG4 is a schematic cross-sectional view of the fire bar in FIG1 ;

[0046] FIG5 is a partial cross-sectional schematic diagram of the assembly structure of the fire grate body, metal mesh, and diverter flame stabilizing member according to an embodiment of the present application;

[0047] FIG6 is a top view of the assembly structure of the fire bar body, metal mesh and diverter flame stabilizing member in FIG5;

[0048] FIG7 is a schematic cross-sectional view of the assembly structure of the fire bar body, metal mesh, and diverter flame stabilizing member in FIG5 ;

[0049] FIG8 is a schematic structural diagram of a metal mesh according to an embodiment of the present application;

[0050] FIG9 is a schematic structural diagram of a diverter and flame stabilizing member according to an embodiment of the present application;

[0051] FIG10 is a top view of the splitter and flame-stabilizing member in FIG9 ;

[0052] FIG11 is a schematic cross-sectional view of the flame-stabilizing member of FIG9;

[0053] FIG12 is a schematic structural diagram of a plurality of fire bars arranged side by side in one embodiment of the present application.

[0054] Description of Figure Numbers:

[0055] Reference numerals Name Reference numerals Name 100 fire bar 22 end mesh 10 fire bar body 30 diversion flame stabilizing element 101 air flow channel 31 first diversion flame stabilizing plate 1011 air inlet 311 diversion hole 1012 ejection section 312 rib 1013 bending section 313 cavity 1014 diversion section 32 second diversion flame stabilizing plate 11 top plate 321 abutting portion 111 combustion fire hole 322 recessed portion 111a middle fire hole group 301 side diversion channel 111b end fire hole group 302 bottom diversion port 1111 first combustion fire hole 303 side diversion port 1112 second combustion fire hole 40 flame stabilizing device 112 protruding teeth 401 side air outlet channel 12 side plate 402 flame stabilizing port 121 side air outlet hole 41 flame stabilizing plate 122 speed reduction convex hump 411 notch 20 metal mesh 412 positioning convex hump 21 middle mesh 413 inner convex hump

[0056] 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

[0057] 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.

[0058] 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.

[0059] 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.

[0060] The fire holes of the fire grid of traditional burners usually adopt a single-strip fire hole structure. This single-strip fire hole structure has a small fire hole area and high combustion intensity. The flue gas performance emitted by instantaneous combustion is poor, resulting in high nitrogen oxides and cannot meet the low nitrogen emission performance requirements.

[0061] The present application proposes a fire bar 100 .

[0062] Referring to Figures 1 to 5, in one embodiment of the present application, a fire grate 100 includes a fire grate body 10, a metal mesh 20, and a diverter flame-stabilizing member 30. An airflow channel 101 is formed within the fire grate body 10. The fire grate body 10 has a top plate 11, which is provided with a plurality of combustion holes 111 communicating with the airflow channel 101. The metal mesh 20 is provided on one side of the top plate 11 and is arranged corresponding to the plurality of combustion holes 111. The diverter flame-stabilizing member 30 is provided within the airflow channel 101 and is provided with a plurality of diverter holes 311 communicating with the plurality of combustion holes 111.

[0063] The fire grate 100 is primarily used on a burner. 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, are pre-mixed within the air flow channel 101, and then flow out through the combustion holes 111 at the top of the fire grate body 10 and are ignited, forming a combustion flame. A metal mesh 20 is provided on one side of the top plate 11 of the fire grate body 10. A diverter flame stabilizing member 30 is provided within the air flow channel 101. The diverter flame stabilizing member 30 has multiple diverter holes 311 connected to the multiple combustion holes 111. The number of layers of the metal mesh 20 can be set to single or multiple layers as needed. The metal mesh 20 can be arranged on the inner side of the top plate 11 (that is, the side close to the diverter flame-stabilizing member 30), or the metal mesh 20 can also be arranged on the outer side of the top plate 11 (that is, the side away from the diverter flame-stabilizing member 30). When the metal mesh 20 is arranged on the outer side of the top plate 11, the burning flame is mainly concentrated on the metal mesh 20 and the metal mesh 20 is easy to turn red. Therefore, the heat resistance and strength requirements of the metal mesh 20 are relatively high. Considering factors such as cost, the metal mesh 20 can be selected to be arranged on the inner side of the top plate 11. Among them, the metal mesh 20 or the diverter flame-stabilizing member 30 is connected and fixed to the fire bar body 10 including but not limited to welding, riveting and the like. When the metal mesh 20 is located between the diverter flame-stabilizing member 30 and the fire bar body 10, the metal mesh 20 can also be selected to be connected and fixed to the diverter flame-stabilizing member 30.

[0064] The fire grate body 10 of the present invention is equipped with a metal mesh 20 and a diverter and flame-stabilizing member 30. An airflow channel 101 is formed within the fire grate body 10, and a plurality of combustion holes 111 are provided at the top of the fire grate body 10, connected to the airflow channel 101. The metal mesh 20 is disposed within the fire grate body 10, corresponding to the plurality of combustion holes 111. The diverter and flame-stabilizing member 30 is disposed within the airflow channel 101 and is provided with a plurality of diverter holes 311 connected to the plurality of combustion holes 111. The airflow within the airflow channel 101 is first diverted by the plurality of diverter holes 311 of the diverter and flame-stabilizing member 30 before flowing to the metal mesh 20 and the plurality of combustion holes 111 at the top of the fire grate body 10. This helps reduce the airflow velocity, achieves more uniform airflow distribution, and improves combustion uniformity. Furthermore, the fine mesh of the metal mesh 20 can disperse the relatively large combustion holes 111 at the top of the fire grate body 10 into a plurality of smaller holes. Compared to the linear fire holes of traditional fire grates, this increases the burner area of ​​fire grate 100. Furthermore, it disperses the fire holes, avoiding the problem of locally high temperatures in the linear fire holes. This results in a more uniform temperature across the combustion surface of fire grate 100, reduces the heat intensity of the fire holes, lowers the flame height, and avoids localized high temperatures. This effectively suppresses the formation of nitrogen oxides (NOx), thereby achieving low-NOx combustion. Furthermore, the metal mesh 20 also prevents flashback. In this way, fire grate 100 reduces the heat intensity of the combustion holes 111, improves combustion uniformity and stability, reduces NOx emissions, and meets low-NOx emission performance requirements.

[0065] As shown in Figure 7, in one embodiment, the metal mesh 20 comprises multiple layers. This multi-layered metal mesh 20 can better disperse the airflow at the combustion holes 111, achieving a more effective flame stabilization and velocity reduction. This prevents localized airflow concentration and the resulting high temperatures, resulting in a more uniform temperature across the combustion surface of the fire bar 100. This reduces the heat intensity of the holes and effectively suppresses the formation of nitrogen oxides (NOx), thereby achieving low-NOx combustion. In one embodiment, the metal mesh 20 comprises 2 to 5 layers. For example, the metal mesh 20 can comprise 2, 3, 4, or 5 layers. In one embodiment, the mesh size of the metal mesh 20 ranges from 20 to 50. For example, the mesh size of the metal mesh 20 can comprise 20, 30, 40, or 50 mesh.

[0066] Please refer to Figures 6 and 8. In one embodiment, the plurality of combustion fire holes 111 are arranged at intervals along the length direction of the top plate 11 to form a plurality of fire hole groups, and the plurality of fire hole groups include a central fire hole group 111a located in the central area of ​​the top plate 11, and two end fire hole groups 111b located in the two end areas of the top plate 11 (as shown in the dotted box in Figure 6); the metal mesh 20 includes a central mesh sheet 21 corresponding to the central fire hole group 111a, and two end mesh sheets 22 corresponding to the two end fire hole groups 111b, and the number of layers of the end mesh sheets 22 is greater than the number of layers of the central mesh sheet 21.

[0067] In one embodiment, multiple combustion holes 111 are arranged at intervals along the length of the top plate 11 to form multiple groups of fire holes. This allows the top surface of the fire bar body 10 to be divided into multiple combustion units along the length, resulting in more uniform combustion. Furthermore, considering that the airflow velocity of the end fire hole groups 111b is faster than that of the middle fire hole group 111a along the length of the top plate 11, the number of layers of the end mesh sheets 22 is greater than that of the middle mesh sheet 21. Thus, the number of layers of the end mesh sheets 22 corresponding to the end fire hole groups 111b is relatively greater, which can create greater resistance to the airflow, thereby reducing the speed of the airflow flowing out of the end fire hole groups 111b. The airflow of the fire hole groups in each area along the length of the top plate 11 remains roughly consistent, which facilitates uniform distribution of gas, further improving combustion uniformity and stability, and reducing nitrogen oxide emissions. For example, the two end mesh sheets 22 use four layers of mesh, and the middle mesh sheet 21 uses three layers of mesh. It is worth noting that, in actual application, the end mesh sheets 22 and the middle mesh sheet 21 can be formed by bending a single long strip of metal mesh 20, which can simplify the manufacturing process and reduce costs. Of course, the end mesh sheets 22 and the middle mesh sheet 21 can also be formed by two independent metal meshes 20, which are respectively attached to the corresponding areas of the top plate 11.

[0068] Please refer to Figure 6. In one embodiment, the plurality of combustion fire holes 111 are arranged at intervals along the length direction of the top plate 11 to form a plurality of fire hole groups, and each of the fire hole groups includes a first combustion fire hole 1111 and a second combustion fire hole 1112; the opening area of ​​the first combustion fire hole 1111 is different from the opening area of ​​the second combustion fire hole 1112.

[0069] In one embodiment, a plurality of combustion holes 111 are arranged at intervals along the length of the top plate 11 to form a plurality of fire hole groups, thereby dividing the top surface of the fire bar body 10 into a plurality of combustion units along the length direction, making combustion more uniform. Each fire hole group includes a first combustion hole 1111 and a second combustion hole 1112. The opening area of ​​the first combustion hole 1111 is different from the opening area of ​​the second combustion hole 1112, so that each combustion unit can form a large and small flame that matches each other when burning. 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 tends to leave the flame, the surrounding flames can be pulled to form a stable flame, making the fire bar 100 more adaptable to the wind speed of the fan.

[0070] It is worth noting that the specific shapes of the first combustion fire hole 1111 and the second combustion fire hole 1112 are not limited, and can be, for example, strips, squares, circles, trapezoids, or other regular or irregular shapes. Exemplarily, the first combustion fire hole 1111 is a strip-shaped hole extending along the width direction of the top plate 11, and the second combustion fire hole 1112 includes two sub-combustion fire holes spaced apart along the width direction of the top plate 11. The fire hole arrangement pattern of the end fire hole group 111b and the middle fire hole group 111a can be the same or different. Exemplarily, the first combustion fire holes 1111 and the second combustion fire holes 1112 in the end fire hole group 111b are arranged alternately. The first combustion fire hole 1111 in the middle fire hole group 111a is located between the two second combustion fire holes 1112. Exemplarily, the opening area of ​​the first combustion fire hole 1111 in the end fire hole group 111b is larger than the opening area of ​​the second combustion fire hole 1112. Exemplarily, the opening area of ​​the first combustion fire hole 1111 in the middle fire hole group 111 a is smaller than the opening area of ​​the second combustion fire hole 1112 .

[0071] As shown in Figure 6, in one embodiment, the plurality of combustion fire holes 111 are arranged at intervals along the length direction of the top plate 11 to form a plurality of fire hole groups, each of the fire hole groups includes a first combustion fire hole 1111 and a second combustion fire hole 1112; the fire hole center of the first combustion fire hole 1111 and the fire hole center of the second combustion fire hole 1112 are staggered in the width direction of the top plate 11.

[0072] In one embodiment, by staggering the centers of the first combustion holes 1111 and the second combustion holes 1112 along the width of the top plate 11, a plurality of combustion holes 111 are formed on the top of the fire bar body 10, one large and one small, staggered and spaced apart. 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 escape, resulting in a more stable flame and further expanding the fire bar 100's adaptability to fan speeds.

[0073] It should be noted that when the combustion fire hole 111 (e.g., the first combustion fire hole 1111) 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 1112) 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 1111 is a strip-shaped hole extending along the width direction of the top plate 11, and the fire hole center of the first combustion fire hole 1111 is substantially located on the width center line of the top plate 11; the second combustion fire hole 1112 includes two sub-combustion fire holes arranged at intervals along the width direction of the top plate 11, and the fire hole centers of the two sub-combustion fire holes are respectively located on both sides of the width center line of the top plate 11. The fire hole center of the first combustion fire hole 1111 and the two fire hole centers of the second combustion fire holes 1112 are staggered in the width direction of the top plate 11 .

[0074] 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 1111 and / or the second combustion hole 1112. 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 hole 111, thereby increasing the circumference of the contact profile between the flame and the periphery of the hole 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.

[0075] In one embodiment, a plurality of the combustion holes 111 are arranged at intervals along the length direction of the top plate 11 to form a plurality of fire hole groups, each of which includes a first combustion hole 1111 and a second combustion hole 1112; the opening area of ​​the first combustion hole 1111 is different from the opening area of ​​the second combustion hole 1112; the center of the first combustion hole 1111 and the center of the second combustion hole 1112 are staggered in the width direction of the top plate 11; and at least some of the edges of the combustion holes 111 are provided with protruding teeth 112. In this way, by providing a staggered fire hole and multiple toothed structures on the top of the fire bar body 10, and in combination with the metal mesh 20 and the diverter flame stabilizing member 30, the problems of flame uniformity and stability, flame height, and lower smoke emissions can be well solved, so that the instantaneous combustion smoke emission performance is better, and the generation of nitrogen oxides can be reduced, so that the emission performance stability and consistency are improved.

[0076] Please refer to Figures 6 and 10. In one embodiment, the top of the diversion flame stabilizing member 30 is provided with a rib 312 for separating any two adjacent diversion holes 311, and the projection of the rib 312 toward the top plate 11 is at least partially located in the area enclosed by the combustion fire hole 111.

[0077] In one embodiment, a plurality of ribs 312 are provided on the top of the diverter flame stabilizing member 30. The ribs 312 may specifically include transverse ribs and longitudinal ribs arranged in an interlaced manner. Any two adjacent separation holes are separated by the ribs 312. The projection of the ribs 312 toward the top plate 11 is at least partially located within the area enclosed by the combustion holes 111, that is, the position of the ribs 312 on the top of the diverter flame stabilizing member 30 corresponds to the position of the combustion holes 111 on the top of the fire bar body 10. In this way, the airflow in the airflow channel 101 can be blocked and decelerated by the ribs 312 and then flow from the diverter holes 311 on both sides to the combustion holes 111, which is conducive to further dispersing the airflow and achieving a better deceleration and flame stabilization effect.

[0078] 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 diversion section 1014 is connected to the multiple combustion fire holes 111, 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.

[0079] 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 and is fully mixed. The airflow is then transported through the curved section 1013 to the diverter section 1014, and then from there to the combustion holes 111. Typically, the airflow velocity at the corner where the curved section 1013 and the diverter section 1014 meet is relatively high, which can easily lead to uneven distribution of the combustion gas. By providing a deceleration structure within the airflow channel 101 corresponding to the corner where the curved section 1013 and the diverter section 1014 meet, the deceleration structure increases the airflow resistance at the corner, reducing the airflow velocity at the corner. This allows for even distribution of the combustion gas flowing out of the diverter section 1014, ensuring more uniform and complete combustion across all parts of the fire grate body 10, and facilitating low-NOx combustion with stable and consistent flue gas emissions.

[0080] There are various ways to form the deceleration structure within the airflow channel 101. For example, the deceleration structure can be integrally formed with the fire bar body 10. Alternatively, the deceleration structure can be a separate component connected and fixed to the fire bar body 10. As long as the deceleration structure can decelerate the airflow at the corners of the airflow channel 101, it will be sufficient.

[0081] In order to simplify the manufacturing process and reduce costs, as shown in Figure 1, in one embodiment, the deceleration structure includes a deceleration bump 122 provided on the side wall of the fire bar body 10, and the deceleration bump 122 protrudes toward the air flow channel 101. In actual production, the deceleration bump 122 can be directly pressed inward at the corner of the air flow channel 101 corresponding to the outer wall of the fire bar body 10, which is simple in process and easy to manufacture. The number of deceleration bumps 122 can be set to single or multiple according to actual needs. In one embodiment, deceleration bumps 122 are respectively provided on opposite sides of the fire bar body 10 in the width direction, so as to achieve a better deceleration effect and make the combustion gas distribution more uniform.

[0082] Based on the above embodiments, please refer to Figures 6, 7 and 10. In one embodiment, the diverter flame-stabilizing component 30 includes a first diverter flame-stabilizing plate 31 provided with a plurality of diverter holes 311. The first diverter flame-stabilizing plate 31 is located below the top plate 11. The first diverter flame-stabilizing plate 31 is provided with a concave cavity 313 on the side facing the top plate 11; the metal mesh 20 is located between the top plate 11 and the first diverter flame-stabilizing plate 31; or the metal mesh 20 is located on the side of the top plate 11 away from the first diverter flame-stabilizing plate 31.

[0083] In one embodiment, the top plate 11, the first diverter and flame-stabilizing plate 31, and the metal mesh 20 are stacked. The metal mesh 20 can be positioned between the top plate 11 and the first diverter and flame-stabilizing plate 31. In this manner, the airflow within the airflow channel 101 is first diverted through the diverter holes 311 of the first diverter and flame-stabilizing plate 31, then dispersed by the mesh of the metal mesh 20 before flowing to the combustion holes 111 on the top plate 11 for combustion. Alternatively, the metal mesh 20 can be positioned on the side of the top plate 11 facing away from the first diverter and flame-stabilizing plate 31. In this case, the airflow within the airflow channel 101 is first diverted through the diverter holes 311 of the first diverter and flame-stabilizing plate 31, then flows to the combustion holes 111 on the top plate 11, and finally burns at the metal mesh 20. The first diverter and flame-stabilizing plate 31 has a concave cavity 313 on the side facing the top plate 11. This cavity 313 allows airflow to pass through, thereby increasing ventilation and ensuring smooth airflow. Through the cooperation of the top plate 11, the metal mesh 20 and the first diversion flame stabilizing plate 31, a good speed reduction and flame stabilization effect can be achieved, the flame can be made uniform and stable, the heat load can be increased, the flame height can be reduced, the adaptability range of the burner can be improved, the instantaneous combustion and flue gas emission performance can be better, and the nitrogen oxides generated after combustion can be lower.

[0084] As shown in Figure 7, in one embodiment, the metal mesh 20 is located between the top plate 11 and the first diverter flame-stabilizing plate 31, the side edge of the first diverter flame-stabilizing plate 31 is in contact with the metal mesh 20, and the middle area of ​​the first diverter flame-stabilizing plate 31 is recessed toward the side away from the metal mesh 20 to form the concave cavity 313.

[0085] In one embodiment, the metal mesh 20 is positioned between the top plate 11 and the first diverter / flame-stabilizing plate 31. This prevents excessive temperatures at the metal mesh 20, improving its service life and reducing the heat resistance and strength requirements for the metal mesh 20, thereby reducing costs. Furthermore, the side edges of the first diverter / flame-stabilizing plate 31 abut against the metal mesh 20, sandwiching the metal mesh 20 between the top plate 11 and the side edges of the first diverter / flame-stabilizing plate 31. This provides a more stable and reliable installation of the metal mesh 20. Furthermore, by abutting the side edges of the first diverter / flame-stabilizing plate 31 against the metal mesh 20, warping of the side edges of the metal mesh 20 is prevented, ensuring the flatness of the metal mesh 20 and further enhancing combustion uniformity and stability. The central region of the first diverter / flame-stabilizing plate 31 can be recessed toward the side facing away from the metal mesh 20 through a press-forming process to form a cavity 313, simplifying the manufacturing process. The cross-sectional shape of the cavity 313 includes, but is not limited to, a V-shape, a U-shape, or other special-shaped structures. Exemplarily, the cavity 313 includes a bottom wall and two side walls extending upwardly and obliquely from opposite sides of the bottom wall. The two side walls are spaced apart from each other from bottom to top, and each side wall is provided with a plurality of diversion holes 311 spaced apart along the length direction.

[0086] As shown in Figures 5 and 7, in one embodiment, the fire bar body 10 also includes two side panels 12 provided on both sides of the width direction of the top panel 11, and the two side panels 12 are extended downward relative to the top panel 11, and the airflow channel 101 is formed between the two side panels 12. The diverter flame-stabilizing component 30 also includes two second diverter flame-stabilizing plates 32 provided on both sides of the width direction of the first diverter flame-stabilizing plate 31, and the two second diverter flame-stabilizing plates 32 are provided on the inner sides of the two side panels 12 in a one-to-one correspondence; each side panel 12 is provided with a side air outlet 121, and a side diverter channel 301 connected to the airflow channel 101 is formed between each second diverter flame-stabilizing plate 32 and the corresponding side panel 12, and the side diverter channel 301 is connected to the side air outlet 121 on the corresponding side panel 12.

[0087] In one embodiment, the airflow within the airflow channel 101 is split into multiple streams upon reaching the diverter flame-stabilizing element 30. The central airflow flows toward the first diverter flame-stabilizing plate 31, then flows through the metal mesh 20 and top plate 11 to the combustion holes 111, where it burns to form the main flame. The airflow on either side flows into the side diverter channels 301 on either side of the diverter flame-stabilizing element 30, then exits through the corresponding side outlets 121 on the side plates 12. The mixed gas exiting the side outlets 121 ignites on the sides of the fire grate body 10 near the combustion holes 111 (i.e., at the flame-stabilizing ports 402), forming side flames. This not only stabilizes the main flame, but also increases the amount of gas flowing to the sides, fully utilizing the space on the sides of the fire grate 100 and increasing the total combustion area, thereby reducing nitrogen oxides (NOx) in the combustion exhaust. NOx in typical gas water heaters is primarily generated by high combustion temperatures. The side flames share some of the main flame's gas, reducing the heat intensity of the main flame area and lowering the temperature of the main flame region, effectively suppressing NOx formation. At the same time, when multiple fire bars 100 of the burner are arranged side by side, the side flames passing through the side of the fire bar body 10 are also conducive to the fire transfer between two adjacent fire bars 100.

[0088] As shown in FIG5 , in one embodiment, each side plate 12 is provided with a plurality of side air outlets 121 spaced apart along the length direction, which can better divert the gas and make the combustion distribution more uniform at various parts along the length direction of the fire grate 100 .

[0089] The multiple side air outlet holes 121 on the side panel 12 can be arranged in a single row or multiple rows. In one embodiment, all the side air outlet holes 121 on each side panel 12 are arranged into at least two rows along the height of the side panel 12. Each row includes multiple side air outlet holes 121 spaced apart along the length of the side panel 12. For example, as shown in FIG5 , all the side air outlet holes 121 on the side panel 12 are arranged into two rows along the height of the side panel 12. 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. This creates a certain velocity difference between the side air outlet holes 121 in each row, better adapting to different combustion conditions. Each row includes multiple side air outlet holes 121 spaced apart along the length of the side panel 12, which increases the air output and ensures more uniform distribution of combustion gases. The shape of the side air outlets 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 multiple side air outlets 121 in the same row can be the same or different, and the shapes of multiple side air outlets 121 in different rows can be the same or different. For example, the multiple side air outlets 121 in the upper row of air outlets are all circular holes, while the multiple side air outlets 121 in the lower row of air outlets include both circular holes and strip holes.

[0090] There are various ways to connect the airflow channel 101 and the side diverter channel 301. For example, in one embodiment, a bottom diverter opening 302 is formed between the lower edge of the second diverter and flame-stabilizing plate 32 and the corresponding side plate 12. The airflow channel 101 connects to the side diverter channel 301 via the bottom diverter opening 302. This allows airflow within the airflow channel 101 to flow into the side diverter channel 301 via the bottom diverter opening 302 and then out through the side air outlet 121. For another example, in another embodiment, the second diverter and flame-stabilizing plate 32 is provided with a side diverter opening 303. This allows airflow within the airflow channel 101 to flow into the side diverter channel 301 via the side diverter opening 303 and then out through the side air outlet 121.

[0091] In one embodiment, as shown in FIG7 , a bottom diversion opening 302 is formed between the lower side edge of the second diversion and flame-stabilizing plate 32 and the corresponding side plate 12 , and the airflow channel 101 is connected to the side diversion channel 301 via the bottom diversion opening 302; the second diversion and flame-stabilizing plate 32 is provided with a side diversion opening 303, and the airflow channel 101 is connected to the side diversion channel 301 via the side diversion opening 303. In this way, part of the airflow in the airflow channel 101 can flow into the side diversion channel 301 via the bottom diversion opening 302, and the other part can flow into the side diversion channel 301 via the side diversion opening 303. In this way, a graded gas outlet effect is formed on the side of the fire grate 100, which can ensure that gas flows out and burns on the side of the fire grate 100 under different load conditions.

[0092] Please refer to Figures 7, 9 and 11. In one embodiment, the second diversion flame stabilizing plate 32 includes an abutting portion 321 abutting against the corresponding side plate 12, and a recessed portion 322 recessed toward the side away from the side plate 12 relative to the abutting portion 321. The side diversion channel 301 is formed between the recessed portion 322 and the corresponding side plate 12. The recessed portion 322 is provided with a side diversion port 303, and the airflow channel 101 is connected to the side diversion channel 301 via the side diversion port 303.

[0093] In one embodiment, a recessed portion 322 can be formed on the second diverter flame-stabilizing plate 32 by a press-forming process, which can simplify the manufacturing process. The number of recessed portions 322 can be set to single or multiple according to actual needs. For example, the multiple side air outlets 121 on the side plate 12 can be divided into multiple groups, and a recessed portion 322 is provided at the position corresponding to each group of side air outlets 121 on the second diverter flame-stabilizing plate 32. Each recessed portion 322 and the wall surface corresponding to the side plate 12 are provided with multiple side diversion openings 303. For example, as shown in Figure 9, the second diverter flame-stabilizing plate 32 is provided with two recessed portions 322 at intervals along the length direction. In one embodiment, the bottom of the recessed portion 322 is open, and a bottom diversion opening 302 is formed between the bottom side edge of the recessed portion 322 and the corresponding side plate 12. In one embodiment, the side of the recessed portion 322 facing away from the bottom diversion opening 302 is tilted toward the corresponding side panel 12, thereby providing a certain degree of airflow guidance, directing the airflow within the side diversion channel 301 to the side outlet 121 on the side panel 12. Furthermore, the second diversion and flame-stabilizing plate 32 also includes an abutment portion 321 disposed around the outer edge of the recessed portion 322. The abutment portion 321 abuts against the corresponding side panel 12, sealing the outer edge of the recessed portion 322. Furthermore, the abutment portion 321 facilitates the connection and fixation of the second diversion and flame-stabilizing plate 32 to the corresponding side panel 12. For example, the abutment portion 321 can be welded to the side panel 12.

[0094] Please refer to Figures 1 to 4. In one embodiment, the fire bar 100 also includes a flame stabilizing device 40 mounted on the top of the fire bar body 10. The flame stabilizing device 40 has a cavity with an open top. A side air outlet channel 401 is formed between the side wall of the cavity and each of the side panels 12. The side air outlet channel 401 is connected to the side air outlet hole 121 on the corresponding side panel 12. The top of the side air outlet channel 401 is open to form a flame stabilizing port 402.

[0095] In this embodiment, a flame stabilizing device 40 is provided on the top of the fire grate body 10, and a side air outlet channel 401 is formed between the cavity of the flame stabilizing device 40 and the side panel 12 of the fire grate body 10. The airflow in the two side areas of the airflow channel 101 first enters the side diversion channel 301 through the two sides of the diversion flame stabilizing member 30, then flows into the side air outlet channel 401 through the side air outlet holes 121 on the side panel 12, and flows out from the flame stabilizing port 402 on the top surface and burns to form a side flame, thereby increasing the air output of the fire grate 100 and making the combustion flame more stable. In addition, by configuring the metal mesh 20, the diversion flame stabilizing member 30, and the flame stabilizing device 40 on the fire grate body 10, a dual flame stabilizing effect can be formed, which can increase the combustion adaptability range of a single piece of heat load, solve the problem of low load operation. The structure is simple, easy to manufacture, low cost, and can meet the low nitrogen emission requirements of the whole machine.

[0096] As an example, as shown in FIG4 , the flame stabilizing device 40 includes two flame stabilizing plates 41 disposed on the outside of the two side panels 12. The two flame stabilizing plates 41 can be welded or riveted to the corresponding side panels 12, and a side air outlet channel 401 is formed between each flame stabilizing plate 41 and the corresponding side panel 12. It can be understood that the two flame stabilizing plates 41 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.

[0097] In one embodiment, the two flame-stabilizing plates 41 are each provided with a plurality of lateral protrusions spaced apart along the length of the side panels 12. As will be appreciated, the fire bar 100 structure is composed of a plurality of fire bar bodies 10 connected side by side, each of which is provided with a flame-stabilizing device 40 on its upper portion. By providing the flame-stabilizing plates 41 with a plurality of lateral protrusions, this embodiment can serve to position adjacent fire bar bodies 10 or increase the secondary air supply.

[0098] Please refer to Figures 1, 2 and 12. In one embodiment, the multiple lateral convex bumps include multiple positioning convex bumps 412 facing away from the cavity and / or multiple inner convex bumps 413 recessed toward the side panel 12. It can be understood that the positioning convex bumps 412 are provided for the flame stabilizing plate 41 to protrude outward. At this time, the adjacent flame stabilizing plates 41 of two adjacent fire bar bodies 10 are positioned and supported by multiple positioning convex bumps 412. The gaps between adjacent fire bar 100 units are consistent, ensuring the supply of secondary air. The inner convex bumps 413 are formed by the flame stabilizing plate 41 being recessed toward the side panel 12, which can increase the flow area of ​​the secondary air supply between adjacent fire bar 100 units and further increase the supply of secondary air. In one embodiment, the inner convex bumps 413 may include a pressed tooth structure or a pull-through pressed structure.

[0099] Furthermore, as shown in FIG1 , the upper edge of the flame stabilizing plate 41 is provided with a plurality of notches 411. In one embodiment, by providing the plurality of notches 411 on the upper edge of the flame stabilizing plate 41, the generation of eddies can be reduced, airflow resistance can be lowered, and flame combustion stability can be enhanced. In one embodiment, the plurality of notches 411 can be spaced apart along the length of the flame stabilizing plate 41.

[0100] 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.

[0101] 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.

[0102] As an example, the combustion equipment may also be a gas water heater, boiler or other equipment.

[0103] 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, the fire bar body has a top plate, and the top plate is provided with a plurality of combustion fire holes communicating with the air flow channel; A metal mesh is disposed on one side of the top plate and is arranged corresponding to the plurality of combustion holes; and The flow-dividing flame-stabilizing member is arranged in the airflow channel, and the flow-dividing flame-stabilizing member is provided with a plurality of flow-dividing holes connected with the plurality of combustion fire holes.

2. The fire bar according to claim 1, wherein: The metal mesh has multiple layers; And / or, the plurality of combustion fire holes are arranged at intervals along the length direction of the top plate to form a plurality of fire hole groups, the plurality of fire hole groups include a middle fire hole group located in the middle area of ​​the top plate, and two end fire hole groups located in the two end areas of the top plate respectively; the metal mesh includes a middle mesh piece arranged corresponding to the middle fire hole group, and two end mesh pieces arranged corresponding to the two end fire hole groups respectively, and the number of layers of the end mesh pieces is greater than the number of layers of the middle mesh pieces.

3. The fire bar according to claim 1 or 2, wherein: The plurality of combustion fire holes are arranged at intervals along the length direction of the top plate to form a plurality of fire hole groups, each of which includes a first combustion fire hole and a second combustion fire hole; wherein, The opening area of ​​the first combustion fire hole is different from the opening area of ​​the second combustion fire hole; And / or, 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 top plate; And / or, at least some of the combustion holes have protruding teeth on their edges.

4. The fire bar according to any one of claims 1 to 3, wherein: A rib for separating any two adjacent diversion holes is disposed on the top of the diversion flame-stabilizing member, and a projection of the rib toward the top plate is at least partially located within the area enclosed by the combustion fire holes.

5. The fire bar according to any one of claims 1 to 4, 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 diversion section is connected to the plurality of combustion fire holes, and a speed reduction structure is provided in the air flow channel at a corner corresponding to the curved section and the diversion section.

6. The fire bar according to any one of claims 1 to 5, wherein: The flow-dividing and flame-stabilizing member comprises a first flow-dividing and flame-stabilizing plate provided with a plurality of flow-dividing holes, the first flow-dividing and flame-stabilizing plate is located below the top plate, and a concave cavity is provided on one side of the first flow-dividing and flame-stabilizing plate facing the top plate; The metal mesh is located between the top plate and the first flow-dividing and flame-stabilizing plate; or the metal mesh is located on a side of the top plate away from the first flow-dividing and flame-stabilizing plate.

7. The fire bar according to claim 6, wherein: The metal mesh is located between the top plate and the first diverter and flame-stabilizing plate, the side edge of the first diverter and flame-stabilizing plate abuts against the metal mesh, and the middle area of ​​the first diverter and flame-stabilizing plate is recessed toward the side away from the metal mesh to form the cavity.

8. The fire bar according to claim 6 or 7, wherein: The fire bar body further includes two side plates respectively arranged on both sides of the top plate in the width direction, the two side plates are both extended downward relative to the top plate, and the airflow channel is formed between the two side plates, and the flow diversion and flame stabilization member further includes two second flow diversion and flame stabilization plates respectively arranged on both sides of the first flow diversion and flame stabilization plate in the width direction, and the two second flow diversion and flame stabilization plates are arranged on the inner sides of the two side plates in a one-to-one correspondence; Each of the side plates is provided with a side air outlet, and a side diversion channel connected to the airflow channel is formed between each of the second diversion flame-stabilizing plates and the corresponding side plate, and the side diversion channel is connected to the side air outlet on the corresponding side plate.

9. The fire bar according to claim 8, wherein: A bottom diversion opening is formed between the lower side edge of the second diversion and flame-stabilizing plate and the corresponding side plate, and the airflow channel is connected with the side diversion channel via the bottom diversion opening; And / or, the second flow diversion and flame stabilizing plate is provided with a side diversion port, and the airflow channel is connected with the side diversion channel via the side diversion port.

10. The fire bar according to claim 8 or 9, wherein: The second diversion flame-stabilizing plate includes an abutting portion abutting against the corresponding side plate, and a recessed portion recessed toward a side away from the side plate relative to the abutting portion, and the side diversion channel is formed between the recessed portion and the corresponding side plate. The recessed portion is provided with a side diversion port, and the airflow channel is connected to the side diversion channel via the side diversion port.

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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