Burner row and burner device

Abstract

The present application relates to the technical field of gas water heaters, and in particular relates to a burner row and a burner device. Gas channels and air channels not in communication with each other are arranged inside the burner row side by side along a width direction, one air channel being provided between every two adjacent gas channels. Burner holes corresponding to each gas channel and in communication with the gas channels are disposed on a top end of the burner row, air outlet holes corresponding to each air channel and in communication with the air channels are disposed on the top end of the burner row, and the burner holes and the air outlet holes are arranged so as to be staggered along the width direction. The burner device comprises the burner row; gas at the burner holes and air flowing out of the air outlet holes intersect and mix, thereby improving the mixing effect of the gas and the air. A supplementary channel for supplying air is formed between adjacent burner rows, thereby further improving the mixing effect of the gas and the air, minimizing load concentration, and preventing a localized high-temperature burning region. The present invention decreases combustion time of a gas, improving burning efficiency and burning stability, and also prevents the issue of deflagration or detonation caused by flashback.

Description

Fire grilles and burners

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on March 29, 2024, with application number 202410379523.5 and invention name “Fire Grate and Burner”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of gas water heaters, and in particular to a fire grate and a burner. Background Art

[0004] Currently, some gases used have low ignition energy, making them extremely easy to ignite; high combustion velocity, concentrated combustion area, and short flames; very high flame propagation velocity during premixed combustion, leading to prominent flashback problems during low-load operation; and low energy radiation rate from the flame to the furnace tube, resulting in localized heat accumulation at the burner outlet, very high flue gas temperatures, and uneven temperature distribution within the furnace. Therefore, these gases are typically burned in the burner using a post-premixed combustion method to address the flashback problem. However, this still results in poor mixing of the gas and air, leading to low combustion efficiency and unstable combustion. Summary of the Invention

[0005] The present application aims to provide a fire grate and a burner, which can effectively solve the technical problems existing in the prior art that the mixing effect of the gas using the post-premixing method is poor, resulting in low combustion efficiency and unstable combustion.

[0006] The first aspect of the present application provides a fire grate, wherein gas channels and air channels that are not connected to each other are arranged side by side in the width direction, and there is an air channel between two adjacent gas channels; a connected fire hole is provided at the top of the fire grate corresponding to each gas channel, and a connected air outlet is provided at the top of the fire grate corresponding to each air channel, and multiple fire holes and air outlet holes are staggered along the width direction.

[0007] Compared with the background technology, the fire grate described in this application has the following beneficial effects:

[0008] This fire grate is suitable for gases with low ignition energy, easy ignition, and fast combustion speed. Since the gas channel and the air channel are not connected to each other, the gas flowing out of the fire hole is premixed with the air, thus avoiding backfire. There is an air channel between two adjacent gas channels, and the top of the fire grate is staggered with fire holes and air outlet holes along the width direction. The air in the air channel flows out through the air outlet holes, so that the gas ejected from the fire holes and the air flowing out of the air outlet holes are cross-mixed, thereby improving the mixing effect of the gas and air. In the burner, a supplementary channel for supplying air is formed between adjacent fire grate, further strengthening the mixing effect of the gas ejected from the fire holes and the air flowing out of the air outlet holes, reducing excessive load concentration, avoiding the occurrence of local high-temperature combustion zones, reducing the combustion time of the gas, improving the combustion efficiency and combustion stability, and at the same time avoiding the combustion problems caused by backfire, deflagration or detonation.

[0009] In one embodiment, a spoiler is provided in each of the air outlet holes along the length direction.

[0010] In one embodiment, the surface of the spoiler along the length direction is a non-flat surface.

[0011] In one embodiment, the spoiler includes a first spoiler and a second spoiler staggered along the length direction, and adjacent first spoilers are connected to the second spoiler at an angle.

[0012] In one embodiment, along the length direction of the spoiler, one side of the spoiler is recessed with a plurality of first spoiler grooves at intervals, and the other side of the spoiler is recessed with a plurality of second spoiler grooves at intervals, and the plurality of first spoiler grooves and the second spoiler grooves are staggered along the length direction of the spoiler.

[0013] In one embodiment, the bottom of the first spoiler groove is inclined to form a first inclined surface, and the bottom of the second spoiler groove is inclined to form a second inclined surface, and the first inclined surface and the second inclined surface are arranged at an angle.

[0014] In one embodiment, the first inclined surface and the second inclined surface have the same inclination angle.

[0015] In one embodiment, a flat portion is provided between the adjacent first spoiler grooves and the second spoiler grooves, and the flat portion is vertically provided.

[0016] In one embodiment, the fire bar comprises an inner shell and an outer shell, the bottom of the inner shell has an injection port, and the interior of the inner shell is provided with a gas channel connected to the injection port; the interior of the two side walls of the outer shell along the width direction is provided with the gas channel;

[0017] The outer shell is sleeved on the inner shell, and two side walls of the inner shell along the width direction respectively form two air passages with corresponding side walls of the outer shell along the width direction.

[0018] In one embodiment, at least one of the two side walls of the inner shell along the width direction is provided with a first flow-blocking convex bulge extending into the gas passage.

[0019] In one embodiment, both side walls of the inner shell along the width direction are provided with a first convex bump extending into the air channel, and the first convex bump is provided with a first through hole;

[0020] The outer shell includes a first shell and a second shell, the first shell is mounted on the outside of the second shell and forms the gas channel, the second shell is provided with a second convex bump extending into the air channel, the second convex bump is provided with a second through hole, the first convex bump and the second convex bump are abutted one-to-one, and the first through hole and the second through hole are connected one-to-one.

[0021] In one embodiment, the inner side wall of the first shell is provided with a second flow-blocking convex hull extending into the corresponding gas channel; along the airflow direction, the second flow-blocking convex hull is located downstream of the second convex hull.

[0022] A second aspect of the present application provides a burner, comprising a main shell and a plurality of the above-mentioned fire bars, wherein the plurality of fire bars are arranged in the main shell at intervals along the width direction.

[0023] Compared with the background technology, the burner described in this application has the following beneficial effects:

[0024] This fire grate is suitable for gases with low ignition energy, high ignition speed, and fast combustion. Because the gas and air channels are disconnected, the gas flowing out of the fire holes is premixed with air, thus preventing backfire. Furthermore, the air in the air channel flows out through the outlet holes, allowing the gas ejected from the fire holes to cross-mix with the air flowing out of the outlet holes, improving the mixing effect of the gas and air. Within the burner, supplementary air supply channels are formed between adjacent fire grate bars, further enhancing the mixing effect of the gas ejected from the fire holes and the air flowing out of the outlet holes. This reduces excessive load concentration, avoids the occurrence of localized high-temperature combustion zones, shortens the combustion time of the gas, improves combustion efficiency and stability, and prevents backfire-induced deflagration or detonation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is a schematic structural diagram of a fire bar provided in an embodiment of the present application;

[0026] FIG2 is a top view of a fire bar provided in an embodiment of the present application;

[0027] FIG3 is a schematic diagram of the exploded structure of the fire grate provided in an embodiment of the present application;

[0028] FIG4 is a cross-sectional view of a fire bar provided in an embodiment of the present application;

[0029] FIG5 is a cross-sectional view of a housing provided in an embodiment of the present application;

[0030] FIG6 is a schematic structural diagram of two first-type spoilers provided in an embodiment of the present application;

[0031] FIG7 is a schematic structural diagram of two second-type spoilers provided in an embodiment of the present application;

[0032] FIG8 is a schematic diagram of the flow trajectory of air in the air channel and the supplementary channel provided in an embodiment of the present application;

[0033] FIG9 is a schematic diagram of the flow trajectory of gas in the gas channel provided in an embodiment of the present application;

[0034] FIG10 is a cross-sectional view of the first convex hull and the second convex hull provided in an embodiment of the present application.

[0035] The names and numbers of the components in the figure are as follows: 10. Gas channel; 20. Air channel; 30. Fire hole; 40. Air outlet; 1. Inner shell; 11. Injection port; 14. First flow-blocking bulge; 15. First bulge; 151. Positioning flange; 2. Outer shell; 21. First shell; 211. First plate; 2111. Second flow-blocking bulge; 22. Second shell; 221. Second plate; 2211. Second bulge; 3. Spoiler; 31. First spoiler; 32. Second spoiler; 33. Clamp; 34. First spoiler groove; 35. Second spoiler groove; 36. Flat portion. DETAILED DESCRIPTION

[0036] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of this application are further described below with reference to the accompanying drawings and through specific implementation methods. It should be understood that the specific embodiments described herein are merely for the purpose of explaining this application and are not intended to limit this application. It should also be noted that, for ease of description, the drawings only show portions relevant to this application, not all of them.

[0037] In the description of this application, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0038] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0039] In the description of this embodiment, terms such as "upper," "lower," "right," and "left" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0040] The technical solution of the present application will be further explained below with reference to the accompanying drawings and through specific implementation methods.

[0041] This embodiment provides a burner for use in gas water heaters, wall-mounted boilers, and other equipment. Specifically, the burner comprises a main housing and multiple fire bars spaced apart along the width of the main housing. Gas is mixed with air through premixing at the fire holes of the fire bars, then combusted to produce high-temperature flue gas, which heats water flowing through a heat exchanger.

[0042] Currently, some gases used have the following combustion characteristics: low ignition energy, making them extremely easy to ignite; high combustion velocity, concentrated combustion area, and short flames; very high flame propagation velocity during premixed combustion, leading to significant flashback issues during low-load operation; and low energy radiation rate from the flame to the furnace tube, resulting in localized heat accumulation at the burner outlet, very high flue gas temperatures, and uneven temperature distribution within the furnace. Therefore, when these gases are burned in the burner using a post-premixing method, they are prone to not mixing the gas and air in a timely and uniform manner, resulting in poor mixing, which can lead to combustion problems such as low combustion efficiency and unstable combustion.

[0043] To address the above-mentioned issues, as shown in Figures 1 to 4, this embodiment further proposes a fire grate, wherein non-interconnected gas channels 10 and air channels 20 are arranged side by side along the width direction (left-right direction in the figures), and an air channel 20 is provided between two adjacent gas channels 10. A connected fire hole 30 is provided at the top of the fire grate corresponding to each gas channel 10, and a connected air outlet hole 40 is provided at the top of the fire grate corresponding to each air channel 20. The multiple fire holes 30 and air outlet holes 40 are staggered along the width direction. Because the gas channels 10 and air channels 20 are non-interconnected, the gas flowing out of the fire holes 30 and the air flowing out of the air outlet holes 40 are premixed and burned, thereby avoiding backfire. In the fire grate, an air channel 20 is provided between two adjacent gas channels 10, and the fire holes 30 and air outlet holes 40 are staggered along the width direction at the top of the fire grate. The air in air passage 20 flows out through air outlet 40, causing the gas ejected from fire holes 30 to cross-mix with the air flowing out of air outlet 40, improving the mixing effect of the gas and air. At the same time, supplementary air supply channels are formed between adjacent fire bars within the burner (as indicated by the arrows on the left and right sides of the fire bars in Figure 8). This further enhances the mixing effect of the gas ejected from fire holes 30 and the air, reduces excessive load concentration, avoids the occurrence of localized high-temperature combustion zones, shortens the combustion time of the gas, improves combustion efficiency and stability, and prevents combustion problems such as flashback leading to deflagration or detonation.

[0044] As shown in Figures 1 to 4, the fire grate includes an inner shell 1 and an outer shell 2. The bottom of the inner shell 1 has an injection port 11, and the interior of the inner shell 1 is provided with a gas channel 10 connected to the injection port 11. The interior of the two side walls of the outer shell 2 along the width direction is provided with a gas channel 10. The outer shell 2 is mounted on the inner shell 1, and the two side walls of the inner shell 1 along the width direction respectively form two air channels 20 with the corresponding side walls of the outer shell 2 along the width direction. The fire grate of this embodiment has two rows of fire holes 30 inside, and the number of individual fire holes 30 in each row is six. In other embodiments, the number of individual fire holes 30 in each row can also be adjusted to other numbers, which is not specifically limited here.

[0045] Specifically, the inner shell 1 and outer shell 2 are both flat, and the inner shell 1 divides the inner cavity of the outer shell 2 into two air channels 20 arranged side by side in the left and right directions. Each air channel 20 is connected to a corresponding air outlet 40. That is, the gas channels 10 and air channels 20 are staggered, and the air in each air channel 20 flows to the left and right fire holes 30 through the air outlet 40. Moreover, supplementary air supply channels are formed between adjacent fire bars, so that air is supplied to both the left and right sides of each fire hole 30, enhancing the mixing effect of gas and air. A multi-channel gas-gas mixing combustion mode is formed in each fire bar of the burner (from left to right): air-gas-air-gas-air-gas-air-gas-air.

[0046] As shown in Figures 3 and 4, the edge of the inner shell 1 is closed and an injection port 11 is formed on the front side of the bottom. The interior of the inner shell 1 is provided with a gas channel 10. After the gas entering from the injection port 11 passes through the gas channel 10, a portion of the gas flows to the fire hole 30 at the top of the gas channel 10, and the remaining gas flows to the fire holes 30 at the top of the gas channel 10 on the left and right sides respectively (as shown by the arrows in Figures 4 and 9). Finally, the gas is fully mixed with the air at the fire hole 30 and then burns.

[0047] In one embodiment, the inner shell 1 is formed by symmetrically fitting two left and right side panels of the same structure, and the edges of the two side panels fit together to achieve a good seal of the gas channel 10. At the same time, the top ends of the two side panels have fire holes 30 connected to the gas channel 10.

[0048] As shown in Figures 3 and 4, at least one of the two side walls of the inner shell 1 along the width direction is provided with a first flow-blocking convex 14 that extends into the gas channel 10. Providing the first flow-blocking convex 14 within the gas channel 10 allows the gas to be evenly diverted at the first flow-blocking convex 14, ensuring pressure balance within the gas channel 10 of the inner shell 1 and allowing the gas to flow evenly toward the multiple fire holes 30 above, achieving uniform combustion. In this embodiment, the first flow-blocking convex 14 is provided on both side walls of the inner shell 1 along the width direction to enhance the uniform flow of gas within the gas channel 10 of the inner shell 1. In other embodiments, the first flow-blocking convex 14 may also be provided on either of the two side walls of the inner shell 1 along the width direction.

[0049] As shown in Figures 3 to 5, the outer shell 2 includes a first shell 21 and a second shell 22. The first shell 21 fits over the exterior of the second shell 22 and forms the gas passage 10. Specifically, the first shell 21 includes two first plates 211 disposed opposite each other along the width direction, and the second shell 22 includes two second plates 221 disposed opposite each other along the width direction. The first shell 21 fits over the exterior of the second shell 22, with the gas passage 10 formed between adjacent first plates 211 and second plates 221. The two widthwise sidewalls of the inner shell 1, respectively, form the air passage 20 with the corresponding second plates 221. Both the first shell 21 and the second shell 22 are flat structures. The first shell 21 is formed by laminating the front and rear sides of two identical left and right first plates 211. The second shell 22 is formed by laminating the front and rear sides of two identical left and right second plates 221. The lower ends of the first plates 211 and the corresponding second plates 221 are tightly connected to form the gas passage 10.

[0050] As shown in Figures 3 to 5, both sidewalls along the width of the inner shell 1 are provided with a first protrusion 15 extending outwardly into the air passage 20. The first protrusion 15 is provided with a first through-hole. The second plate 221 is provided with a second protrusion 2211 extending outwardly into the air passage 20. The second protrusion 2211 is provided with a second through-hole. The first protrusion 15 and the second protrusion 2211 are in a one-to-one abutment with each other, and the first through-holes and the second through-holes are in one-to-one communication. That is, the first protrusion 15 and the second protrusion 2211 are in one-to-one communication, allowing some of the gas in the gas passage 10 of the inner shell 1 to flow through the interconnected first and second protrusions 15, 2211 into the corresponding gas passage 10 of the outer shell 2, ensuring smooth flow of gas within the three gas passages 10. In this embodiment, the left and right sidewalls of the inner shell 1 are each provided with a plurality of first bumps 15 of equal height and spaced evenly in the front-to-back direction. Correspondingly, the two second plates 221 are each provided with a plurality of second bumps 2211 of equal height and spaced evenly in the front-to-back direction to ensure uniform gas flow within the gas passage 10. It will be appreciated that the number, spacing, and installation height of the first bumps 15 and the second bumps 2211 can be flexibly adjusted based on actual usage requirements.

[0051] In one embodiment, as shown in FIG10 , the outer edge of the first through hole of the first convex bump 15 is bent outward in the opposite direction to form a positioning flange 151. The positioning flange 151 presses the top of the second convex bump 2211 against the top of the first convex bump 15, thereby achieving a close fit between the first convex bump 15 and the second convex bump 2211, improving the sealing between the first convex bump 15 and the second convex bump 2211, and preventing gas leakage.

[0052] In one embodiment, as shown in Figures 4 and 5 , the first plate 211 is provided with a second flow-blocking bump 2111 extending into the corresponding gas channel 10. Along the airflow direction, the second flow-blocking bump 2111 is located downstream of the second flow-blocking bump 2211. The second flow-blocking bump 2111 is positioned at the entrance of the gas channel 10 of the housing 2 (where the second flow-blocking bump 2211 is located). After the gas enters the gas channel 10 of the housing 2, the flow is blocked by the second flow-blocking bump 2111, resulting in uniform gas flow within the gas channel 10 of the housing 2. This ensures pressure balance within the gas channel 10 of the housing 2, allowing the gas to flow evenly toward the flame holes 30 above.

[0053] Specifically, each first plate 211 is provided with three second flow-blocking convex humps 2111 of equal height, and the projections of the three second flow-blocking convex humps 2211 on the second plate 221 on the adjacent first plate 211 are respectively located directly below the three second flow-blocking convex humps 2111. In other embodiments, the number and spacing of the second flow-blocking convex humps 2111 are adaptively adjusted according to the number and spacing of the second flow-blocking convex humps 2211.

[0054] As shown in Figures 1 and 4, each outlet hole 40 is provided with a spoiler 3 along its length (front-to-back direction in the figures). The air flowing out of the outlet hole 40 is turbulent through the spoiler 3. The spoiler 3 creates a turbulent flow in the air in the outlet hole 40, enhancing the collision and mixing effect between the air in the outlet hole 40 and the gas in the fire holes 30 on the left and right sides, thereby improving combustion efficiency.

[0055] In one embodiment, the surface of the spoiler 3 along the length direction (the front-to-back direction in the figure) is a non-flat surface, so that the spoiler 3 has different flow directions, that is, the air has different flow directions after passing through the same surface of the spoiler 3, thereby forming a turbulent effect at the air outlet 40.

[0056] In one embodiment, as shown in Figure 6, the spoiler 3 includes first spoilers 31 and second spoilers 32 staggered along the length, with adjacent first spoilers 31 and second spoilers 32 connected at an angle. The staggered arrangement of the first spoilers 31 and second spoilers 32 creates an equidistant air flow-forming structure on the spoiler 3, thereby creating a good turbulent air flow and enhancing the collision and mixing effect between the air and the gas.

[0057] In one embodiment, as shown in FIG7 , a plurality of first spoiler grooves 34 are recessed at intervals on one side of the spoiler 3 along the length direction, and a plurality of second spoiler grooves 35 are recessed at intervals on the other side of the spoiler 3. The plurality of first spoiler grooves 34 and the second spoiler grooves 35 are staggered along the length direction of the spoiler 3. The first spoiler grooves 34 and the second spoiler grooves 35 are formed by stamping the spoiler 3 for ease of processing.

[0058] Specifically, the bottom of the first spoiler groove 34 is tilted to form a first inclined surface, while the bottom of the second spoiler groove 35 is tilted to form a second inclined surface. The first and second inclined surfaces are arranged at an angle, and the first and second inclined surfaces have the same inclination angle. The first and second inclined surfaces not only create a good turbulent flow effect in the air, enhancing the collision and mixing effect between the air and the gas, but also guide the air toward the fire hole 30, further enhancing the mixing effect between the gas and the air.

[0059] In one embodiment, as shown in FIG7 , a flattened portion 36 is provided between adjacent first and second spoiler grooves 34, 35. The flattened portion 36 is vertically disposed and, along the length of the spoiler 3, is shorter than the lengths of the first and second spoiler grooves 34, 35. The provision of the flattened portion 36 increases the contact area between the spoiler 3 and the air, thereby enhancing the turbulence effect and making air distribution more uniform, which is beneficial for improving flame combustion uniformity. Furthermore, by making the length of the flattened portion 36 shorter than the lengths of the first and second spoiler grooves 34, 35, more air can be directed to the flame hole 30 while ensuring flame combustion uniformity, thereby ensuring sufficient combustion of the gas.

[0060] Specifically, the fire grate of this embodiment is equipped with two spoilers 3, each mounted within one of the two air outlets 40. To facilitate installation, the two ends of the two spoilers 3 of this embodiment are connected together to form a U-shaped clamp 33. The clamp 33 is fixed to the top of the inner shell 1, ensuring a secure installation of the two spoilers 3 and improving installation efficiency.

[0061] As shown in Figure 8, the air flow path in the fire row is as follows: under the action of the fan assembly of the gas water heater (or wall-mounted boiler), the air flows from the bottom of the burner from the bottom to the top. A portion of the air flows upward through the two air channels 20 between the two rows of fire holes 30. After passing through the spoiler pressure-shaped structure of the spoiler 3, the air forms a turbulent effect at the air outlet 40, causing the air to collide and mix with the gas flowing out of the fire holes 30 on the left and right sides to burn. At the same time, another portion of the air is supplied to the fire holes 30 through the supplementary channels formed between adjacent fire rows, causing the gas ejected from the fire holes 30 to cross-mix with the air on the left and right sides, further enhancing the mixing effect of the gas and air and ensuring complete combustion of the gas.

[0062] As shown in Figure 9, the flow path of the gas in the fire grate is as follows: under the injection action of the gas distribution pipe assembly of the gas water heater (or wall-mounted boiler), the gas is ejected from the nozzle of the gas distribution pipe assembly at a certain flow rate and enters the gas channel 10 of the inner shell 1 through the injection port 11 of the inner shell 1 of the fire grate. Then, after passing through the first flow-blocking convex 14 in the gas channel 10 of the inner shell 1, the gas is evenly divided in the gas channel 10 of the inner shell 1. Part of the gas flows to the fire hole 30 at the top of the gas channel 10 of the inner shell 1, and the other part of the gas flows evenly to the gas channels 10 of the outer shell 2 on both sides. Finally, after passing through the second flow-blocking convex 2111 in the gas channel 10 of the outer shell 2, the gas flows evenly to the fire hole 30 at the top of the gas channel 10 of the outer shell 2, achieving uniform combustion of the gas.

[0063] In the burner, the air in the supplementary channel between adjacent fire bars is in laminar flow, and the air channel 20 inside the fire bar is in turbulent flow at the air outlet 40. The fire bar forms a multi-channel gas-gas mixed combustion mode of air (laminar flow)-gas-air (turbulent flow)-gas-air (turbulent flow)-gas-air (laminar flow) at the top, realizing multi-channel air outlet and air supply in the fire, improving the mixing effect of the gas and air ejected from the fire hole 30, reducing excessive load concentration, avoiding the occurrence of local combustion high-temperature areas, reducing combustion time, and improving the combustion efficiency and combustion stability of the gas.

[0064] The above embodiments merely illustrate the basic principles and features of the present application. The present application is not limited to the above embodiments. Various changes and modifications may be made to the present application without departing from the spirit and scope of the present application. Such changes and modifications are intended to fall within the scope of the present application. The scope of protection claimed in the present application is defined by the appended claims and their equivalents.

Claims

1. Fire broiler, characterized in that, The fire grate is provided with mutually unconnected gas channels (10) and air channels (20) arranged side by side along the width direction, and one air channel (20) is provided between two adjacent gas channels (10); the top of the fire grate is provided with a connected fire hole (30) corresponding to each of the gas channels (10), and the top of the fire grate is provided with a connected air outlet (40) corresponding to each of the air channels (20), and a plurality of the fire holes (30) and the air outlet (40) are staggered along the width direction.

2. The fire bar according to claim 1, characterized in that: A spoiler (3) is provided in each of the air outlet holes (40) along the length direction.

3. The fire bar according to claim 2, characterized in that: The surface of the spoiler (3) along the length direction is a non-flat surface.

4. The fire bar according to claim 3, characterized in that: The spoiler (3) comprises a first spoiler (31) and a second spoiler (32) arranged alternately along the length direction, and adjacent first spoilers (31) and second spoilers (32) are connected at an angle.

5. The fire bar according to claim 3, characterized in that: Along the length direction of the spoiler (3), one side of the spoiler (3) is recessed with a plurality of first spoiler grooves (34) at intervals, and the other side of the spoiler (3) is recessed with a plurality of second spoiler grooves (35) at intervals, and the plurality of first spoiler grooves (34) and the second spoiler grooves (35) are staggered along the length direction of the spoiler (3).

6. The fire bar according to claim 5, characterized in that: The bottom of the first spoiler groove (34) is tilted to form a first inclined surface, and the bottom of the second spoiler groove (35) is tilted to form a second inclined surface, and the first inclined surface and the second inclined surface are arranged at an angle.

7. The fire bar according to claim 6, characterized in that: The first inclined surface and the second inclined surface have the same inclination angle.

8. The fire bar according to claim 5, characterized in that: A flattened portion (36) is further provided between the adjacent first spoiler groove (34) and the second spoiler groove (35), and the flattened portion (36) is vertically provided.

9. The fire bar according to any one of claims 1 to 8, characterized in that: The fire grate comprises an inner shell (1) and an outer shell (2); the bottom of the inner shell (1) is provided with an injection port (11), and the interior of the inner shell (1) is provided with a gas channel (10) communicating with the injection port (11); the interior of the two side walls of the outer shell (2) along the width direction is provided with the gas channel (10); The outer shell (2) is sleeved on the inner shell (1), and the two side walls of the inner shell (1) along the width direction respectively form two air passages (20) with the corresponding side walls of the outer shell (2) along the width direction.

10. The fire bar according to claim 9, characterized in that: At least one of the two side walls of the inner shell (1) along the width direction is provided with a first flow-blocking convex hump (14) extending into the gas channel (10).

11. The fire bar according to claim 10, characterized in that: The inner shell (1) has two side walls along the width direction thereof protruding outwardly and provided with a first convex bump (15) extending into the air passage (20), and the first convex bump (15) is provided with a first through hole; The housing (2) comprises a first shell (21) and a second shell (22), wherein the first shell (21) is fitted onto the outside of the second shell (22) and forms the gas passage (10), and the second shell (22) is provided with a second convex bump (2211) protruding outwards and extending into the air passage (20), and the second convex bump (2211) is provided with a second through hole, and the first convex bump (15) is in one-to-one contact with the second convex bump (2211), and the first through hole is in one-to-one communication with the second through hole.

12. The fire bar according to claim 11, characterized in that: The inner side wall of the first shell (21) is provided with a second flow-blocking convex hump (2111) extending into the corresponding gas channel (10); along the airflow direction, the second flow-blocking convex hump (2111) is located downstream of the second convex hump (2211).

13. A burner, characterized in that The utility model comprises a main shell and a plurality of fire bars according to any one of claims 1 to 12, wherein the plurality of fire bars are arranged in the main shell at intervals along the width direction.

Images