Fire grate and combustor
By designing non-connected gas and air channels in the burner and using supplementary channels between adjacent fire trays to strengthen the mixing, the problem of poor gas and air mixing effect is solved, the combustion efficiency and stability are improved, and the mixture is avoided Detonation or detonation caused by backfire.
Patent Information
- Application Number
- CN202420639261.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-03-29
AI Technical Summary
When the existing gas adopts the post-premix method in the burner, the mixing effect between the gas and air is poor, resulting in low combustion efficiency and unstable combustion, which is prone to backfire, deflagation or detonation.
A fire tray is designed, and the internal gas channels and air channels are arranged in the width direction, and the connected fire holes and air outlets are arranged at the top. The air in the air passage flows in a direction toward adjacent fire holes through the air outlets to form Cross-mix and strengthen the mixing effect through supplementary channels between adjacent fire trays, reducing load concentration and avoiding the occurrence of local high temperature zones.
The mixing effect between gas and air is improved, combustion time is reduced, combustion efficiency and stability is improved, and the deflagation or detonation problems caused by backfire are avoided, achieving more uniform combustion characteristics.
Smart Images
Figure CN222143058U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gas water heaters, in particular to a fire grate and a burner. Background Art
[0002] At present, some of the fuel gases used have the following combustion characteristics: 1) small ignition energy, very easy to ignite; 2) high combustion speed, concentrated combustion area, short flame; 3) very high flame propagation speed of premixed combustion, flashback problem is prominent during low load operation; 4) low energy radiation rate of the flame to the furnace tube, resulting in local accumulation of heat at the burner outlet, very high flue gas temperature, and uneven temperature distribution in the furnace. Therefore, the above-mentioned fuel gases are usually burned in the burner in a post-premixed combustion mode (i.e., no primary air is introduced, and the fuel gas is mixed with air at the outlet of the fire grate for combustion) to solve the flashback problem, but there are still combustion problems such as the inability to mix the fuel gas and air in time and evenly, and the mixing effect is poor, resulting in low combustion efficiency and unstable combustion. Utility Model Content
[0003] One of the technical problems solved by the utility model is to provide a fire grate, which can effectively solve the technical problem in the prior art that the mixing effect of the gas in the post-premixing method is poor, resulting in low combustion efficiency and unstable combustion.
[0004] The second technical problem solved by the utility model is to provide a burner which can effectively solve the technical problem 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.
[0005] The first technical problem mentioned above is solved by the following technical solution:
[0006] A fire grate, wherein the interior of the fire grate is provided with mutually unconnected gas channels and air channels along the width direction, the top of the fire grate is provided with a connected fire hole corresponding to each of the gas channels, the top of the fire grate is provided with a connected air outlet hole corresponding to each of the air channels, each fire hole corresponds to at least one air outlet hole, and each of the air outlet holes faces the adjacent fire hole.
[0007] Compared with the background technology, the fire grate of the utility model has the following beneficial effects:
[0008] This fire grate is suitable for gas with low ignition energy, easy to ignite, and fast burning speed. Since the gas channel and the air channel are not connected to each other, the gas flows out of the fire hole and is premixed with the air, thereby avoiding backfire. The air in the air channel flows to the adjacent fire hole through the air outlet, so that the gas ejected from the fire hole and the air provided by the adjacent air outlet are cross-mixed, thereby improving the mixing effect of the gas and air. At the same time, a supplementary channel for supplying air is formed between adjacent fire grates in the burner, further strengthening the mixing effect of the gas ejected from the fire hole and the air, effectively reducing excessive load concentration, avoiding the occurrence of local high-temperature combustion areas, reducing the combustion time of the gas, improving the combustion efficiency and combustion stability, and avoiding the combustion problem of backfire leading to deflagration or detonation.
[0009] In one of the embodiments, a spoiler is arranged 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 alternately arranged 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 alternately arranged 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 adjacent first spoiler grooves and second spoiler grooves, and the flat portion is vertically provided.
[0016] In one embodiment, the fire grate includes 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 conveying cavity 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; the outer shell is mounted on the inner shell, and the two side walls of the inner shell along the width direction respectively form two air channels with the corresponding side walls of the outer shell along the width direction.
[0017] In one of the embodiments, two guide flanges are relatively arranged at the top end of the inner shell, the guide flanges are inclined toward the adjacent fire holes, and together with the top end of a side wall of the corresponding outer shell along the width direction, form the air outlet.
[0018] In one of the embodiments, the inclination angle of the guide flange relative to the height direction of the inner shell is 10° to 20°.
[0019] In one of the embodiments, at least one of the two side walls of the inner shell along the width direction is provided with a first flow-blocking convex hump extending into the conveying cavity.
[0020] 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 passage, and the first convex bump is provided with a first through hole;
[0021] The 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 passage, the second shell is provided with a second convex bump extending into the air passage, the second convex bump is provided with a second through hole, the first convex bump is abutted against the second convex bump in a one-to-one correspondence, and the first through hole is connected to the second through hole in a one-to-one correspondence.
[0022] In one of the embodiments, the inner side wall of the first shell is provided with a second flow-blocking convex hump extending into the corresponding gas channel; along the airflow direction, the second flow-blocking convex hump is located downstream of the second convex hump.
[0023] The above second technical problem is solved by the following technical solution:
[0024] The burner comprises a main shell and a plurality of the above-mentioned fire bars, wherein the plurality of the fire bars are arranged in the main shell at intervals along the width direction.
[0025] Compared with the background technology, the burner described in the utility model has the following beneficial effects:
[0026] When the gas burns at the fire holes of multiple fire bars in the burner, the air in the air passage of each fire bar flows to the adjacent fire holes through the air outlet holes, so that the gas ejected from the fire holes is cross-mixed with the air provided by the adjacent air outlet holes, thereby improving the mixing effect of the gas and air. At the same time, a supplementary channel for supplying air is formed between adjacent fire bars in the burner, further strengthening the mixing effect of the gas ejected from the fire holes and the air, effectively reducing excessive load concentration, avoiding the occurrence of local high-temperature combustion areas, reducing the combustion time of the gas, improving the combustion efficiency and combustion stability, and avoiding the combustion problem of flashback leading to deflagration or detonation. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a structural schematic diagram of the fire grate provided by the embodiment of the utility model;
[0028] Figure 2 It is a top view of the fire bar provided by the embodiment of the utility model;
[0029] Figure 3 It is a schematic diagram of the structural decomposition of the fire grate provided in the embodiment of the utility model;
[0030] Figure 4 is a cross-sectional view of a fire grate provided by an embodiment of the utility model;
[0031] Figure 5 is a cross-sectional view of a housing provided by an embodiment of the utility model;
[0032] Figure 6 It is a schematic structural diagram of two first-type spoilers provided in an embodiment of the utility model;
[0033] Figure 7 It is a schematic structural diagram of two second spoilers provided by an embodiment of the utility model;
[0034] Figure 8 It is a schematic diagram of the flow trajectory of air in the air channel and the supplementary channel provided by the embodiment of the utility model;
[0035] Fig. 9 It is a schematic diagram of the flow trajectory of the gas in the gas channel provided by the embodiment of the utility model;
[0036] Fig.10 yes Fig. 9 A partial enlarged view of point A in the middle.
[0037] The names and numbers of the components in the figure are as follows:
[0038] 10. Gas channel; 20. Air channel; 30. Fire hole; 40. Air outlet;
[0039] 1. Inner shell; 11. Injection port; 12. Delivery cavity; 13. Guide flange; 14. First flow-blocking convex hull; 15. First convex hull; 151. Positioning flange;
[0040] 2. Shell; 21. First shell; 211. First plate; 2111. Second flow-blocking convex hull; 22. Second shell; 221. Second plate; 2211. Second convex hull;
[0041] 3. spoiler; 31. first spoiler plate; 32. second spoiler plate; 33. clamp; 34. first spoiler groove; 35. second spoiler groove; 36. flat portion. DETAILED DESCRIPTION
[0042] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of them.
[0043] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0044] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0045] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0046] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.
[0047] This embodiment provides a burner, which is used in a gas water heater or a wall-mounted boiler. Specifically, the burner includes a main housing and a plurality of fire bars, which are arranged in the main housing at intervals along the width direction. The gas is mixed with air at the fire holes of the fire bars by a post-premixing method and then burns to generate high-temperature flue gas to heat water flowing through a heat exchanger.
[0048] At present, some of the fuel gases used have the following combustion characteristics: low ignition energy, very easy to ignite; high combustion speed, concentrated combustion area, short flame; very high flame propagation speed of premixed combustion, prominent flashback problem during low-load operation; low energy radiation rate of the flame to the furnace tube, resulting in localized heat accumulation at the burner outlet, very high flue gas temperature, and uneven temperature distribution in the furnace. Therefore, the above-mentioned fuel gases are burned in the burner in a post-premixing manner, which easily leads to the failure of the fuel gas and air to mix evenly in time, resulting in poor mixing effect, which leads to combustion problems such as low combustion efficiency and unstable combustion.
[0049] To solve the above problems, Figure 1 to Figure 4 As shown, this embodiment also proposes a fire grate, wherein the fire grate is provided with mutually unconnected gas channels 10 and air channels 20 along the width direction (left and right direction in the figure), and the top of the fire grate is provided with a connected fire hole 30 corresponding to each gas channel 10, and each fire hole 30 corresponds to at least one air outlet 40, and the top of the fire grate is provided with a connected air outlet 40 corresponding to each air channel 20. In this embodiment, two air channels 20 are provided between two adjacent gas channels 10, that is, there are two air outlets 40 between two adjacent fire holes 30 along the width direction of the fire grate. This fire grate is suitable for gas with low ignition energy, easy to ignite, and fast burning speed. Since the gas channel 10 and the air channel 20 are not connected to each other, the gas flows out of the fire hole 30 and is premixed with the air to avoid backfire. And each air outlet 40 is facing the adjacent fire hole 30. The air in the air passage 20 flows to the adjacent fire hole 30 through the air outlet 40, so that the gas ejected from the fire hole 30 is cross-mixed with the air provided by the adjacent air outlet 40, thereby improving the mixing effect of the gas and air. At the same time, a supplementary air supply channel (such as Figure 8 The mixing effect of the gas and air ejected from the fire holes 30 is further enhanced, which effectively reduces excessive load concentration, avoids the occurrence of local high-temperature combustion areas, reduces the combustion time of the gas, improves the combustion efficiency and combustion stability, and avoids the combustion problem of flashback leading to deflagration or detonation.
[0050] like Figure 1 and Figure 3As shown, 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 inner shell 1 is provided with a conveying chamber 12 connected to the injection port 11. The inner sides of the outer shell 2 along the width direction are 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 single fire holes 30 in each row is six. In other embodiments, the number of single fire holes 30 in each row can also be adjusted to other numbers, which is not specifically limited here.
[0051] Specifically, the inner shell 1 and the 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, and each air channel 20 is respectively connected to a corresponding air outlet 40, that is, there are two air channels 20 between the two gas channels 10, and the air in each air channel 20 flows to the adjacent fire hole 30 through the air outlet 40. Moreover, a supplementary channel for supplying air is formed between adjacent fire rows, so that there is air on both the left and right sides of each fire hole 30, which enhances the mixing effect of gas and air, and forms a multi-channel gas-gas mixing combustion mode of air-gas-air-air-gas-air in each fire row of the burner (from left to right).
[0052] like Figure 3 and Figure 4 As shown, the edge of the inner shell 1 is closed and an injection port 11 is formed on the front side of the bottom. The inner shell 1 has a delivery cavity 12. The gas entering from the injection port 11 flows through the delivery cavity 12 to the gas channels 10 on the left and right sides (as shown in FIG. Figure 4 and Fig. 9 Finally, the gas is fully mixed with the air at the fire hole 30 at the top of the gas channel 10 and then burns.
[0053] In one embodiment, two guide flanges 13 are arranged at the top of the inner shell 1, and the guide flanges 13 are arranged obliquely toward the adjacent fire hole 30, and together with the top of a side wall of the corresponding outer shell 2 along the width direction, form an air outlet 40. The inner shell 1 is formed by symmetrically fitting two left and right side panels with the same structure, and the edges of the two side panels fit together, so that a good seal of the conveying cavity 12 is achieved. At the same time, the tops of the two side panels have two guide flanges 13 extending obliquely from bottom to top and outward, so that the air of the air outlet 40 flows toward the adjacent fire hole 30 under the action of the guide flanges 13 (such as Figure 8 As shown by the arrow in the middle, most of the air in the air passage 20 flows in a direction to the adjacent fire hole 30, thereby improving the mixing effect of the gas and air and the combustion efficiency.
[0054] In one of the embodiments, the inclination angle α of the guide flange 13 relative to the height direction of the inner shell 1 (the up and down direction in the figure) is 10° to 20°. Specifically, the inclination angle α of the guide flange 13 can be 10°, 12°, 14°, 16°, 18° or 20°, etc. By setting the inclination angle α to the above-mentioned value, the guide flange 13 guides most of the air to flow in a directional manner through the air outlet 40 to the adjacent fire hole 30 as much as possible. If the inclination angle α is too small, the guiding effect of the guide flange 13 is not obvious; if the inclination angle α is too large, the opening area of the air outlet 40 will be reduced, which has a certain blocking effect on the directional flow of air, which is not conducive to the supply of air. It should be noted that the top of the guide flange 13 is flush with the top of the outer shell 2 (i.e., the fire outlet 30).
[0055] like Figure 3 and Figure 4 As shown, 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 bulge 14 extending into the delivery chamber 12. The first flow-blocking convex bulge 14 is provided in the delivery chamber 12, so that the gas is evenly diverted at the first flow-blocking convex bulge 14, ensuring the pressure balance inside the delivery chamber 12, so that the gas flows evenly to the multiple fire holes 30 above, and achieves uniform combustion. The first flow-blocking convex bulge 14 is provided on both side walls of the inner shell 1 along the width direction of this embodiment to enhance the uniform flow effect of the gas in the delivery chamber 12. In other embodiments, the first flow-blocking convex bulge 14 can also be provided on any one of the two side walls of the inner shell 1 along the width direction.
[0056] like Figure 3 to Figure 5 As shown, the outer shell 2 includes a first shell 21 and a second shell 22, and the first shell 21 is mounted on the outside of the second shell 22 to form a gas channel 10. Specifically, the first shell 21 includes two first plates 211 arranged opposite to each other along the width direction, and the second shell 22 includes two second plates 221 arranged opposite to each other along the width direction. The gas channel 10 is surrounded by the adjacent first plates 211 and second plates 221. The two side walls of the inner shell 1 along the width direction respectively surround the air channel 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 left and right first plates 211 with the same structure, and the second shell 22 is formed by laminating the front and rear sides of two left and right second plates 221 with the same structure, and the first plate 211 is tightly connected to the lower end of the corresponding second plate 221 to form the gas channel 10.
[0057] like Figure 3 to Figure 5As shown, both side walls of the inner shell 1 along the width direction are provided with a first convex bump 15 extending into the air channel 20, and the first convex bump 15 is provided with a first through hole. The second plate 221 is provided with a second convex bump 2211 extending into the air channel 20, and the second convex bump 2211 is provided with a second through hole. The first convex bump 15 is abutted against the second convex bump 2211 in a one-to-one correspondence, and the first through hole is connected to the second through hole in a one-to-one correspondence, that is, the first convex bump 15 is connected to the second convex bump 2211 in a one-to-one correspondence, so that the gas in the delivery cavity 12 flows into the corresponding gas channel 10 through the first convex bump 15 and the second convex bump 2211 that are connected to each other. In this embodiment, the left and right side walls of the inner shell 1 are provided with a plurality of first convex bumps 15 of equal height and equal spacing in the front-to-back direction, and the two second plates 221 are provided with a plurality of second convex bumps 2211 of equal height and equal spacing in the front-to-back direction, so as to ensure that the gas flows evenly in the gas channel 10. It is understandable that the number, spacing distance and installation height of the first convex bumps 15 and the second convex bumps 2211 can be flexibly adjusted according to actual usage requirements.
[0058] In one embodiment, if Fig.10 As shown, 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 avoiding gas leakage.
[0059] In one embodiment, if Figure 4 and Figure 5 As shown, a second flow-blocking convex hump 2111 extending into the corresponding gas channel 10 is provided on the inner side wall of the first shell 21 (i.e., the first plate 211). Along the flow direction of the gas flow, the second flow-blocking convex hump 2111 is located downstream of the second convex hump 2211. The second flow-blocking convex hump 2111 is provided at the entrance of the gas channel 10 (where the second convex hump 2211 is located). After the gas enters the gas channel 10, it passes through the flow-blocking effect of the second flow-blocking convex hump 2111, so that the gas is evenly diverted in the gas channel 10, ensuring the pressure balance inside the gas channel 10, so that the gas flows evenly to the fire hole 30 above.
[0060] Specifically, each first plate 211 is provided with three second flow-blocking convex hulls 2111 of equal height, and the projections of the three second flow-blocking convex hulls 2211 on the second plate 221 on the adjacent first plates 211 are respectively located directly below the three second flow-blocking convex hulls 2111. In other embodiments, the number and spacing of the second flow-blocking convex hulls 2111 are adaptively adjusted with the number and spacing of the second convex hulls 2211.
[0061] like Figure 1 and Figure 4As shown, each air outlet 40 is provided with a spoiler 3 along the length direction (front-to-back direction in the figure), and the air flowing out of the air outlet 40 forms turbulence through the spoiler 3. The air in the air outlet 40 achieves turbulence effect through the spoiler 3, and at the same time, under the guidance of the guide flange 13 of the inner shell 1, the air in the air outlet 40 flows in a directional turbulent flow toward the adjacent fire hole 30, which enhances the collision and mixing effect between the air in the air outlet 40 and the gas in the adjacent fire hole 30, and improves the combustion efficiency.
[0062] In one of the embodiments, 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 side of the spoiler 3, thereby forming a turbulent effect at the air outlet 40.
[0063] In one embodiment, if Figure 6 As shown, the spoiler 3 includes a first spoiler 31 and a second spoiler 32 staggered along the length direction, and the adjacent first spoilers 31 and second spoilers 32 are connected at an angle. By staggered first spoilers 31 and second spoilers 32, an equidistant air spoiler pressure-shaped structure is formed on the spoiler 3, so that the air has a better turbulent effect and the collision and mixing effect of air and gas is enhanced.
[0064] In one embodiment, if Figure 7 As shown, 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, and the openings of adjacent first spoiler grooves 34 and second spoiler grooves 35 face opposite directions. The first spoiler grooves 34 and the second spoiler grooves 35 are formed by stamping the spoiler 3 for easy processing.
[0065] Specifically, the bottom of the first spoiler groove 34 is inclined to form a first inclined surface, and the bottom of the second spoiler groove 35 is inclined to form a second inclined surface. The first inclined surface and the second inclined surface are arranged at an angle, and the first inclined surface and the second inclined surface have the same inclination angle. By setting the first inclined surface and the second inclined surface, not only can the air have a better turbulent effect, and enhance the collision and mixing effect of air and gas, but also guide the air, so that the air flows toward the direction of the fire hole 30, further enhancing the mixing effect of gas and air.
[0066] In one embodiment, if Figure 7As shown, a flattening portion 36 is further provided between the adjacent first spoiler groove 34 and the second spoiler groove 35. The flattening portion 36 is vertically provided, and along the length direction of the spoiler 3, the length of the flattening portion 36 is less than the length of the first spoiler groove 34 and the second spoiler groove 35. By providing the flattening portion 36, the contact area between the spoiler 3 and the air is increased, thereby enhancing the spoiler effect, and at the same time making the air distribution more uniform, which is conducive to improving the combustion uniformity of the flame. At the same time, the length of the flattening portion 36 is set shorter than the length of the first spoiler groove 34 and the second spoiler groove 35. On the basis of satisfying the uniformity of flame combustion, more air can be directed to the fire hole 30 area, thereby making the gas fully burn.
[0067] Specifically, two spoilers 3 are installed in the fire bar of the present embodiment, and the two spoilers 3 are respectively installed in the two air outlets 40 in the fire bar. In order to facilitate installation, the two ends of the two spoilers 3 of the present embodiment are connected as a whole to form a U-shaped clamp 33, and the clamp 33 is fixed to the top of the inner shell 1 by clamping, so that the two spoilers 3 are stably installed, and the installation efficiency of the spoilers 3 is improved.
[0068] like Figure 8 As shown, the flow path of the air in the fire row is: 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 bottom to top. A part of the air flows upward through the two air channels 20 between the two rows of fire holes 30, and passes through the spoiler pressure-shaped structure of the spoiler 3, so that the air forms a turbulent effect at the outlet hole 40. At the same time, under the guiding effect of the guide flange 13 of the inner shell 1, the air in the air channel 20 realizes a directional turbulent flow toward the adjacent fire hole 30, so that the air and the gas flowing out of the fire hole 30 collide and mix and burn. At the same time, another part of the air provides air to the fire hole 30 through the supplementary channel formed between the adjacent fire rows, so that the gas ejected from the fire hole 30 is cross-mixed with the air on the left and right sides, further strengthening the mixing effect of the gas and air, and ensuring the complete combustion of the gas.
[0069] like Fig. 9 As shown, the flow path of the gas in the fire grate is as follows: the gas is ejected from the nozzle of the gas distribution pipe assembly at a certain flow rate under the injection action of the gas distribution pipe assembly of the gas water heater (or wall-mounted boiler), and enters the delivery cavity 12 through the injection port 11 of the inner shell 1 of the fire grate. Then, the gas passes through the first flow-blocking convex hull 14 in the delivery cavity 12 and is evenly divided in the delivery cavity 12, and flows evenly to the gas channels 10 on the left and right sides, and finally passes through the second flow-blocking convex hull 2111 in the gas channel 10 and evenly flows to the fire hole 30, thereby achieving uniform combustion of the gas.
[0070] 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 directional flow at the air outlet 40. The fire bar forms a multi-channel gas-gas mixed combustion mode of air (laminar flow)-gas-air (directional turbulence)-air (directional turbulence)-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, effectively 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.
[0071] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. Fire row, characterized in that, The fire grate is provided with mutually unconnected gas channels (10) and air channels (20) along the width direction, the top of the fire grate is provided with a connected fire hole (30) corresponding to each of the gas channels (10), the top of the fire grate is provided with a connected air outlet hole (40) corresponding to each of the air channels (20), each of the fire holes (30) corresponds to at least one of the air outlet holes (40), and each of the air outlet holes (40) faces the adjacent fire hole (30).
2. The fire bar according to claim 1, characterized in that: A spoiler (3) is arranged in each of the air outlet holes (40) along the length direction.
3. The fire bar according to claim 2, characterized in that: The side 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 plate (31) and a second spoiler plate (32) which are staggered 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 arranged alternately along the length direction of the spoiler (3).
6. The fire bar according to claim 5, characterized in that: The groove bottom of the first spoiler groove (34) is inclined to form a first inclined surface, and the groove bottom of the second spoiler groove (35) is inclined 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 grooves (34) and the second spoiler grooves (35), and the flattened portion (36) is vertically arranged.
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 inner shell (1) has an injection port (11) at its bottom, and the inner shell (1) is provided with a conveying cavity (12) in communication with the injection port (11); the inner sides of the outer shell (2) along the width direction are provided with the gas passage (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 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: Two guide flanges (13) are arranged opposite to each other at the top end of the inner shell (1); the guide flanges (13) are arranged obliquely toward the adjacent fire hole (30) and together with the top end of a side wall of the corresponding outer shell (2) along the width direction, form the air outlet (40).
11. The fire bar according to claim 10, characterized in that: The inclination angle of the guide flange (13) relative to the height direction of the inner shell (1) is 10° to 20°.
12. 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 conveying cavity (12).
13. The fire bar according to claim 9, characterized in that: Both side walls of the inner shell (1) along the width direction are provided with a first convex bump (15) protruding outwards and 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); the first shell (21) is mounted on the outside of the second shell (22) to form the gas passage (10); the second shell (22) is provided with a second convex bump (2211) protruding outwards and extending into the air passage (20); the second convex bump (2211) is provided with a second through hole; the first convex bump (15) is abutted against the second convex bump (2211) in a one-to-one correspondence, and the first through hole is connected to the second through hole in a one-to-one correspondence.
14. The fire bar according to claim 13, 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).
15. 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 14, wherein the plurality of fire bars are arranged in the main shell at intervals along the width direction.