BURNER HEAD, FIRE GRATE AND GAS DEVICE

Abstract

A burner head, a fire grate and a gas device are provided. The burner head includes a burner cover and a metal mesh. The burner cover includes a fire partition plate. The fire partition plate is provided with a plurality of fire ports provided at intervals. The fire partition plate is configured to form a partition member between two adjacent fire ports. At least part of the partition member are provided with a first weld position. The metal mesh is provided at the burner cover and is configured to cover the plurality of fire ports. The metal mesh is provided with a first weld spot corresponding to the first weld position. The metal mesh is welded to the first weld position at the first weld spot.

Claims

1. A burner head comprising: a burner cover comprising a fire partition plate, the fire partition plate being provided with a plurality of fire ports provided at intervals, the fire partition plate being configured to form a partition member between two adjacent fire ports, and at least part of the partition member being provided with a first weld position; and a metal mesh provided at the burner cover and configured to cover the plurality of fire ports, wherein the metal mesh is provided with a first weld spot corresponding to the first weld position, and the metal mesh is welded to the first weld position at the first weld spot.

2. The burner head according to claim 1, wherein: the fire partition plate is provided with the plurality of first weld positions along a length direction, wherein the metal mesh is provided with the plurality of first weld spots along the length direction, the first weld spots being welded to the first weld positions one by one; and/or wherein the first weld position is provided at a middle position in a width direction of the fire partition plate.

3. The burner head according to claim 1, wherein the partition member provided with the first weld position is circular or elliptical.

4. The burner head according to claim 1, wherein: the metal mesh is provided with a plurality of layers; and/or the metal mesh is provided at a surface of the fire partition plate facing away from a counter-fire face of the fire partition plate.

5. The burner head according to claim 1, wherein: the fire partition plate comprises a middle region and two end regions respectively provided at both ends of the middle region in a length direction of the fire partition plate; and an opening area of a single fire port provided at the end region is smaller than an opening area of a single fire port provided at the middle region.

6. The burner head according to claim 1, wherein: the fire partition plate is provided with a hollow region; and the fire partition plate comprises first ribs and second ribs provided in the hollow region, the first rib being intersected with the second rib to divide the hollow region into the plurality of fire ports, and an intersection of the first rib and the second rib forming the partition member.

7. The burner head according to claim 6, wherein: the first rib is extended along a width direction of the fire partition plate; and the second rib is extended along a length direction of the fire partition plate, a plurality of first ribs being provided at intervals along the length direction of the fire partition plate, the second rib being provided between at least two adjacent first ribs.

8. The burner head according to claim 7, wherein: the fire partition plate comprises a middle region and two end regions respectively provided at both ends of the middle region in the length direction of the fire partition plate; a density of the first ribs provided at the middle region is greater than a density of the first ribs provided at the end region; and/or among the plurality of second ribs provided in the length direction of the fire partition plate, at least two adjacent second ribs in the middle region are provided in a staggered manner in the width direction of the fire partition plate.

9. The burner head according to claim 6, wherein: the fire partition plate is provided with cover regions provided at both sides of a length direction of the hollow region; and the cover region is provided with second weld positions, both ends of the metal mesh being respectively provided with a second weld spot corresponding to the second weld position, the metal mesh being welded to the second weld position by the second weld spots.

10. The burner head according to claim 1, wherein: a side edge of the fire partition plate is provided with flanges at a position corresponding to at least part of the fire port; and a notch is formed between at least part of the flanges and the corresponding side edge of the fire port, wherein part of the side edge of the metal mesh is provided at a bottom side of the flange.

11. A fire grate comprising: a fire grate body, provided with an airflow channel and an air outlet communicated with the airflow channel; and the burner head according to claim 1, wherein the burner head is provided at the air outlet.

12. A gas device comprising the fire grate according to claim 11.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to explain the embodiments of the present application or the technical solutions in the existing technology more clearly, the accompanying drawings needed to be used in the description of the embodiments or the existing technology will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, other accompanying drawings can be obtained based on the provided accompanying drawings without exerting creative efforts for those skilled in the art.

[0011] FIG. 1 is a schematic structural diagram of a fire grate in the present application.

[0012] FIG. 2 is a schematic structural diagram of a decomposed structure of the fire grate in FIG. 1.

[0013] FIG. 3 is a schematic structural diagram of a burner head in the present application.

[0014] FIG. 4 is a top view of the burner head in FIG. 3.

[0015] FIG. 5 is a schematic structural diagram of a burner cover in an embodiment of the present application.

[0016] FIG. 6 is a top view of the burner cover in FIG. 5.

[0017] FIG. 7 is a top view of the burner cover in another embodiment of the present application.

[0018] FIG. 8 is a schematic structural diagram of a metal mesh in the present application.

[0019] FIG. 9 is a top view of a weld spot of a metal mesh in the present application.

[0020] FIG. 10 is a side view of a weld spot of a metal mesh in the present application.

[0021] The realization of the purpose, functional features and advantages of the present application will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The technical solutions in the embodiments according to the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments according to the present application, and it is clear that the described embodiments are only a part of the embodiments according to the present application, and not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative labor fall within the scope of the present application.

[0023] It should be noted that if there are directional instructions (such as up, down, left, right, front, back or the like) involved in the embodiments of the present application, the directional indications are only used to explain the relative positional relationship, movement and so on between various components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, if there are descriptions involving first, second or the like, the descriptions of first, second or the like are only for descriptive purposes and cannot be understood as indicating or implying the relative importance or implicitly indicating the quantity of the technical features indicated. Therefore, features defined as first and second may explicitly or implicitly include at least one of these features. In addition, the meaning of and/or appearing in the entire text includes three parallel solutions, taking A and/or B as an example, it includes solution A, or solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions of various embodiments can be combined with each other, but it is based on that those skilled in the art can realize. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that such combination of technical solutions does not exist and is not within the protection scope claimed by the present application.

[0025] In the related art, some burners' fire grates are equipped with metal mesh at their burner heads, and the mesh holes of the metal mesh are used to form fine combustion holes. However, the resistance of the metal mesh fire holes is relatively small, when the wind speed of the fan fluctuates, it is easy to cause flame separation and fire failure, resulting in unstable combustion, poor smoke emission, combustion resonance and other problems.

[0026] Based on this, the present application proposes a burner head 200, which aims to increase the resistance of the corresponding part, reduce the airflow intensity, avoid flame separation and fire failure, improve combustion stability and combustion completeness, and reduce nitrogen oxide emissions by setting weld spots at the metal mesh 30.

[0027] Referring to FIG. 1 and FIG. 2, the burner head 200 can be applied to the fire grate 1000. The fire grate body 100 of the fire grate 1000 is provided with an airflow channel 101 for introducing fuel gas and air. The two ends of the airflow channel 101 respectively are provided with an air inlet 102 and an air outlet 103 that penetrate the surface of the fire grate body 100. In an embodiment, the air inlet 102 is provided at the lower side of the fire grate body 100, and the air outlet 103 is provided at the top of the fire grate body 100. The airflow channel 101 is provided in a curved shape. The burner head 200 is provided at the air outlet 103 of the fire grate body 100. The fuel gas and air mixed in the airflow channel 101 are ejected via the air outlet 103 and burn at the fire port 211 of the burner head 200 to generate flames. The structure of the burner head 200 is described below by way of an embodiment.

[0028] Referring to FIG. 3 and FIG. 4, in the present application, the burner head 200 includes a burner cover 20 and a metal mesh 30. The burner cover 20 includes a fire partition plate 21, the fire partition plate 21 is provided with a plurality of fire ports 211 provided at intervals, the fire partition plate 21 is configured to form a partition member 217 between two adjacent fire ports 211, and at least part of the partition member 217 are provided with a first weld position. The metal mesh 30 is provided at the burner cover 20 and is configured to cover the plurality of fire ports 211, the metal mesh 30 is provided with a first weld spot 31 corresponding to the first weld position, and the metal mesh 30 is welded to the first weld position at the first weld spot 31.

[0029] It can be understood that the burner cover 20 is provided at the air outlet 103 of the fire grate body 100, and the fire partition plate 21 is provided opposite to the air outlet 103. The airflow channel 101 in the fire grate body 100 is connected to the air flow source via the air inlet 102. The air flow source includes air and fuel gas. The fuel gas and air enter the airflow channel 101 from the air inlet 102, and flow to the air outlet 103 after being pre-mixed in the airflow channel 101, and are ejected and ignited via the plurality of fire ports 211 at the burner cover 20 to form a combustion flame. The specific structure of the burner cover 20 can be determined according to actual conditions, for example, it can be a plate structure, a U-shaped structure or other shape structures. The burner cover 20 can be made of high temperature resistant sheet metal. The plurality of fire ports 211 at the fire partition plate 21 are provided at intervals, which can play a role in equalizing the flow, so that the airflow is ejected more evenly. In an embodiment, the shape of the fire port 211 can be circular, square, triangular, strip or other irregular shapes.

[0030] The metal mesh 30 is provided at the burner cover 20 and covers the plurality of fire ports 211. The metal mesh 30 can be composed of high temperature resistant materials, such as iron chromium aluminum materials. The metal mesh 30 can be set as a single layer or multiple layers as needed, which is not specifically limited here. The use of metal mesh 30 can increase the burner area of the fire grate 1000 compared with the strip fire holes of the traditional fire grate 1000 on one hand, and can disperse the fire holes to avoid the problem of local high temperature of the strip fire holes on the other hand, thus making the temperature of the burning surface of the fire grate 1000 more uniform, reducing the heat intensity of the fire holes, and eliminating local high temperature, effectively inhibiting the generation of nitrogen oxides (NOx), thereby achieving low-nitrogen combustion (NOx in gas water heaters is mainly generated due to high combustion temperatures). In addition, metal mesh 30 can also prevent safety accidents such as explosions caused by backfire.

[0031] In this embodiment, the fire partition plate 21 is provided with a partition member 217 between two adjacent fire ports 211. The partition member 217 can separate the two adjacent fire ports 211 and can increase the resistance of the fuel gas flowing out of the airflow channel 101 of the fire grate 1000, so that the airflow velocity at the peripheral part of the partition member 217 is relatively slow, which has a flame stabilizing effect. at least part of the partition member 217 are provided with a first weld position. For example, when a plurality of partition members 217 are provided along the length direction of the fire partition plate 21, the first weld position can be selected to be provided at each partition member 217, or the first weld position can be selected to be provided at the partition member 217 corresponding to the region where the airflow velocity is relatively fast. A first weld spot 31 is provided at the metal mesh 30 at a position corresponding to the first weld position, and the metal mesh 30 is welded to the first weld position at the first weld spot 31, so that the metal mesh 30 is welded and fixed to the fire partition plate 21.

[0032] The technical solution of the present application is that the burner cover 20 is provided with a plurality of fire ports 211 distributed at intervals at the fire partition plate 21 of the burner cover 20, the metal mesh 30 covers the plurality of fire ports 211, which can increase the burning zone on one hand and disperse the airflow on the other hand, making the combustion more uniform and stable. As shown in FIG. 9 and FIG. 10, the metal mesh 30 is welded to the first weld position of the partition member 217 at the first weld spot 31. During the spot welding process of the metal mesh 30, the center position of the first weld spot 31 is squeezed most obviously and melts into one at high temperature. Therefore, the metal mesh 30 at the center position of the first weld spot 31 is the tightest and has the largest resistance, which spreads from the middle to the surroundings, and the resistance gradually changes from the maximum when being tight to the normal resistance of the metal mesh 30 in the natural state. The design of the weld spot makes the metal mesh 30 have the characteristic of gradual resistance change. When the airflow ejected from the airflow channel 101 burns at the metal mesh 30, the flames are connected. The velocity of flow of the fuel gas is slow at the position with large resistance, and it is not easy to occur fire failure and flame separation, thus the flame stabilization effect near the weld spot of the metal mesh 30 is the best; and it is connected with the surrounding flames to play a pulling role at the same time. Therefore, compared with the scheme without weld spot design in the related art, the overall flame of the burner head 200 is more stable and not easy to flame out. At the same time, the shielding of the partition member 217 can further increase the airflow resistance and improve the flame stabilization effect. In this way, with the cooperation of the metal mesh 30 and the fire partition plate 21, and with the combined design of the first weld spot 31 and the first weld position of the partition member 217, the overall flame of the burner head 200 can be made more stable, not easy to occur fire failure and flame separation, and the combustion is more complete, and the nitrogen oxide emission in the combustion flue gas is lower.

[0033] As shown in FIG. 3, in an embodiment, the fire partition plate 21 is provided with the plurality of first weld positions along a length direction, the metal mesh 30 is provided with the plurality of first weld spots 31 along the length direction, and the first weld spots 31 are welded to the first weld positions one by one.

[0034] In this embodiment, the fire partition plate 21 is provided with a plurality of fire ports 211 at intervals along its length direction, and a partition member 217 is formed between any two adjacent fire ports 211, so that the plurality of partition members 217 are provided at intervals along the length direction of the fire partition plate 21, and the first weld positions 217 can be respectively provided at the plurality of partition members 217 provided along the length direction. Correspondingly, the metal mesh 30 is provided with a plurality of first weld spots 31 at intervals along its length direction, and the first weld spots 31 are welded to the corresponding first weld positions 21. In this way, on one hand, the welding stability between the metal mesh and the fire partition plate 21 can be ensured to prevent the metal mesh 30 from falling off during the combustion process; on the other hand, the burner head 200 is provided with a plurality of locations with greater airflow resistance provided at intervals along its length direction, so that the burner head 200 can produce better flame stabilizing effect in each region along its length direction.

[0035] In an embodiment, the first weld position is provided at a middle position in a width direction of the fire partition plate 21.

[0036] In this embodiment, the middle position of the width direction of the fire partition plate 21 can be understood as a position interval with a floating preset distance at both sides of the reference line with the width center line of the fire partition plate 21 as the reference line. For example, the first weld position can be set at the position at the width center line of the fire partition plate 21, or the first weld position can be set at a position deviated from the width center line of the fire partition plate 21 by a preset distance. The resistance of the first weld position is the largest and gradually decreases toward the surroundings, so that the flame in the middle position of the fire partition plate 21 can pull the surrounding flames to achieve a better flame stabilization effect.

[0037] In an embodiment, the partition member 217 provided with the first weld position is circular or elliptical. In this way, the contact area between the first weld position and the metal mesh 30 can be increased to ensure that the weld spot is firm and reliable. In some embodiments, the partition member 217 can be formed at the intersection of the first rib 214 and the second rib 215. In an embodiment, the partition member 217 is set to a circular shape, which is conducive to improving the strength of the intersection of the two ribs and preventing welding.

[0038] In order to further improve the uniformity of the flame, as shown in FIG. 8 and FIG. 10, in an embodiment, the metal mesh 30 is provided with a plurality of layers.

[0039] In this embodiment, using the plurality of layers of metal mesh 30 can further break up the air and fuel gas, so that the fuel gas and air are evenly mixed. A gap is provided between the metal mesh 30 and the metal mesh 30, which will not be completely blocked to increase the resistance, and can be shielded from each other to avoid airflow blowing directly through the fire hole, which is easy to cause the fire to fall out, and at the same time can also play a better role in preventing backfire.

[0040] In practical inventions, the number of layers of the metal mesh 30 is related to the mesh number of the metal mesh 30. The metal mesh 30 with more meshes has fewer layers, and the metal mesh 30 with fewer meshes has more layers. For example, the number of layers of the metal mesh 30 can be 2 to 10 layers, specifically 2 layers, 3 layers, 4 layers, 5 layers, 6 layers, 7 layers, 8 layers, 9 layers or 10 layers. The mesh number of the metal mesh 30 can be 20 to 100 meshes, specifically 20 meshes, 40 meshes, 50 meshes, 60 meshes, 80 meshes or 100 meshes. As an example, the metal mesh 30 can use a 4-layer mesh. As an example, the mesh number range of the metal mesh 30 can be selected between 20 meshes and 40 meshes.

[0041] In an embodiment, as shown in FIG. 10, the plurality of layers of metal mesh 30 are welded at the first weld spot 31, that is, the plurality of layers of metal mesh 301 are fused together at the first weld spot 31, so that the plurality of layers of metal mesh 30 is pulled at the first weld spot 31, the resistance at the first weld spot 31 is the largest, the resistance gradually changes from the center position of the first weld spot 31 to the surrounding area and becomes the normal resistance of the plurality of layers of metal mesh 30 in the natural state, and the velocity of flow of the fuel gas also gradually increases from the center position of the first weld spot 31 to the surrounding area, so as to achieve a better flame stabilization effect.

[0042] It can be understood that the metal mesh 30 can be located above or below the fire port 211, that is, the metal mesh 30 can be provided at a burning surface of the fire partition plate 21, or a surface of the fire partition plate 21 facing away from a counter-fire face of the fire partition plate 21. The burning surface of the fire partition plate 21 refers to the side of the fire partition plate 21 away from the airflow channel 101 of the fire grate 1000, and the surface of the fire partition plate 21 facing away from the counter-fire face of the fire partition plate 21 refers to the side of the fire partition plate 21 facing the airflow channel 101 of the fire grate 1000. In actual invention, since the flame burns above the burner head 200, the heat resistance, strength and other requirements of the metal mesh 30 located above the fire port 211 will be higher than the heat resistance, strength and other requirements below the fire port 211. Considering factors such as cost and service life, in an embodiment, the metal mesh 30 is provided at a surface of the fire partition plate 21 facing away from the counter-fire face of the fire partition plate 21, so that the metal mesh 30 is located below the fire port 211.

[0043] It can be understood that the airflow at both ends of the burner head 200 collides with the boundary wall and flows upward sharply, that is, the gas flow rate of two end regions 21b of the fire partition plate 21 is faster than the gas flow rate of the middle region 21a, and the problem of fire failure and flame separation is easy to occur in two end regions 21b, which is not conducive to combustion stability.

[0044] In order to solve the above problem, as shown in FIG. 4, in an embodiment, the fire partition plate 21 includes a middle region 21a and two end regions 21b respectively provided at both ends of the middle region 21a in a length direction of the fire partition plate 21; an opening area of a single fire port 211 provided at the end region 21b is smaller than an opening area of a single fire port 211 provided at the middle region 21a. In this way, the opening area of a single fire port 211 located in the end region 21b is relatively small, which is beneficial to increase the airflow resistance of the end region 21b, thereby balancing the gas flow amount and gas flow rate of the entire fire partition plate 21, avoiding the occurrence of flame failure and flame separation due to excessive gas flow rate in the two end regions 21b, thereby further achieving the effect of stable combustion.

[0045] As shown in FIG. 5 to FIG. 7, in some embodiments, the fire partition plate 21 is provided with a hollow region, the fire partition plate 21 includes first ribs 214 and second ribs 215 provided in the hollow region, the first rib 214 is intersected with the second rib 215 to divide the hollow region into the plurality of fire ports 211, and an intersection of the first rib 214 and the second rib 215 forming the partition member 217.

[0046] In this embodiment, the fire partition plate 21 may include a surrounding frame, first ribs 214 provided in the surrounding frame and second ribs 215 provided in the surrounding frame. The surrounding frame is surrounded to form the hollow region. The first rib 214 and the second rib 215 are cross-provided to divide the hollow region with a larger area into a plurality of fire ports 211 with relatively smaller areas, which is beneficial to scattering the airflow, and can increase the airflow resistance at the rib part, reducing the airflow velocity, and enhancing the flame stabilization effect. The intersection of the first rib 214 and the second rib 215 forms a partition member 217, and at least part of the partition member 217 are provided with a first weld position, that is, the first weld position is located at the intersection of the first rib 214 and the second rib 215. The contact area with the metal mesh 30 can be increased by the intersection, thus ensuring welding stability. In an embodiment, the intersection of the first rib 214 and the second rib 215 is provided in a circular shape, which is beneficial to improving the strength of the intersection of the two ribs and preventing welding.

[0047] As shown in FIG. 6 and FIG. 7, in some embodiments, the first rib 214 is extended along a width direction of the fire partition plate 21, the second rib 215 is extended along a length direction of the fire partition plate 21, a plurality of first ribs 214 is provided at intervals along the length direction of the fire partition plate 21, the second rib 215 is provided between at least two adjacent first ribs 214.

[0048] In this embodiment, the first rib 214 is a longitudinal rib extending along the width direction of the fire partition plate 21, and the second rib 215 is a transverse rib extending along the width direction of the fire partition plate 21. The plurality of first ribs 214 divide the hollow region into a plurality of burning zones provided at intervals along the length direction of the fire partition plate 21, and second ribs 215 is provided between at least two adjacent first ribs 214. For example, any two adjacent first ribs 214 may be connected by the second rib 215; or, a part of the two adjacent first ribs 214 may not be provided with the second rib 215, and another part of the two adjacent first ribs 214 may be connected by the second rib 215. In this way, the fire ports 211 at the fire partition plate 21 have a variety of arrangement forms.

[0049] For example, as shown in FIG. 7, in an embodiment, the plurality of fire ports 211 include a first fire port 211a and a second fire port 211b. Two first ribs 214 and one second rib 215 are surrounded to form the first fire port 211a, and two first ribs 214 are surrounded to form the second fire port 211b.

[0050] For another example, as shown in FIG. 6, in another embodiment, the pluralities of fire ports 211 include a third fire port 211c and a fourth fire port 211d. The third fire port 211c and the fourth fire port 211d are both surrounded by two first ribs 214 and one second rib 215 to form.

[0051] As shown in FIG. 6, in an embodiment, the plurality of fire ports 211 located in the middle region 21a of the fire partition plate 21 are arranged to form at least one fire hole row, and each fire hole row includes the third fire port 211c and the fourth fire port 211d alternately provided along the length direction of the fire partition plate 21, and the opening area of the third fire port 211c is greater than the opening area of the fourth fire port 211d.

[0052] In this embodiment, the plurality of fire ports 211 located in the middle region 21a of the fire partition plate 21 may be arranged to form a single fire hole row, double fire hole row, or a plurality of fire hole rows. Taking the single fire hole row as an example, the fire hole row includes a plurality of third fire ports 211c and fourth fire ports 211d provided alternately along the length direction of the fire partition plate 21, and the opening area of the third fire port 211c is larger than the opening area of the fourth fire port 211d. In this way, a plurality of burning units provided alternately in a big and a small manner can be formed in the length direction of the fire partition plate 21, and the flame at the fire partition plate 21 can be divided into a big flame and a small flame. Due to the different sizes of the flames, the boundary conditions of the wind speed when occurring fire failure and flame separation are also different. When a flame has a tendency to occur flame separation, the surrounding flames can be pulled to form a stable flame, so that the fire grate 1000 has a wider range of adaptability to the wind speed of the fan.

[0053] In an embodiment, at least two fire hole rows are provided at the middle region 21a of the fire partition plate 21, and the at least two fire hole rows include a first fire hole row and a second fire hole row adjacently provided in the width direction of the fire partition plate 21, and the first fire hole row and the second fire hole row both include a third fire port 211c and a fourth fire port 211d alternately arranged along the length direction of the fire partition plate 21, and the third fire port 211c in the first fire hole row is provided opposite to the fourth fire port 211d in the second fire hole row.

[0054] As shown in FIG. 6, taking two fire hole rows as an example, namely the first fire hole row and the second fire hole row. The first fire hole row can be arranged in the length direction of the fire partition plate 21 according to the rule of the third fire port 211c, the fourth fire port 211d, the third fire port 211c, the fourth fire port 211d . . . ; the second fire hole row can be provided in the length direction of the fire partition plate 21 according to the rule of the fourth fire port 211d, the third fire port 211c, the fourth fire port 211d, the third fire port 211c . . . , so that in the width direction of the fire partition plate 21, the third fire port 211c in the first fire hole row and the fourth fire port 211d in the second fire hole row are provided opposite to each other. In this way, not only can a number of big burning units and small burning units provided alternately be formed in the length direction of the fire partition plate 21, but also a number of big burning units and small burning units provided alternately can be formed in the width direction of the fire partition plate 21. As a result, the flame at the fire partition plate 21 can be divided into a big flame and a small flame along its length and width directions, thereby forming a better flame stabilizing effect, further improving the combustion stability and reducing the combustion noise.

[0055] As shown in FIG. 4, in an embodiment, the fire partition plate 21 includes a middle region 21a and two end regions 21b respectively provided at both ends of the middle region 21a in the length direction of the fire partition plate 21; a density of the first ribs 214 provided at the middle region 21a is greater than a density of the first ribs 214 provided at the end region 21b.

[0056] In this embodiment, a density of the first ribs 214 provided at the end region 21b is greater than a density of the first ribs 214 provided at the middle region 21a, that is, within a unit area, the number of the first ribs 214 provided in the end region 21b is greater, so that the opening area of a single fire port 211 provided in the end region 21b is smaller than the opening area of a single fire port 211 provided in the middle region 21a, so that the end region 21b can increase the airflow resistance by having more first ribs 214, thereby balancing the gas flow amount and gas flow rate of the entire fire partition plate 21, avoiding fire failure and flame separation due to excessive gas flow rate in two end region 21b, thereby further achieving the effect of stabilizing combustion.

[0057] As shown in FIG. 4, in an embodiment, among the plurality of second ribs 215 provided in the length direction of the fire partition plate 21, at least two adjacent second ribs 215 in the middle region 21a are provided in a staggered manner in the width direction of the fire partition plate 21.

[0058] In this embodiment, two adjacent second ribs 215 are provided in a staggered manner, that is, the center lines of any two adjacent second ribs 215 are not at the same straight line. The staggered second ribs 215 can make the two adjacent fire ports 211 in the same row form a staggered arrangement effect, so that a plurality of big and small burning units provided at intervals in a staggered manner are formed at the fire partition plate 21. With such arrangement, the flame at the fire partition plate 21 can be divided into a big and a small flame, and the big flames and small flames are staggered and separated. When a flame has a tendency to occur flame separation, the surrounding flames can be pulled to form a stable flame, so that the fire grate 1000 has a wider range of adaptability to the wind speed of the fan.

[0059] As shown in FIG. 3, in an embodiment, the fire partition plate 21 is provided with cover regions provided at both sides of a length direction of the hollow region, the cover region is provided with second weld positions, both ends of the metal mesh 30 are respectively provided with a second weld spot 32 corresponding to the second weld position, and the metal mesh 30 is welded to the second weld position by the second weld spots 32. In this way, both ends of the metal mesh 30 can be welded and fixed, further improving the welding stability of the metal mesh 30 and the fire partition plate 21; and it can also avoid the warping deformation of the both ends of the metal mesh 30 in a high temperature environment, so as to ensure the flatness of the metal mesh 30.

[0060] As shown in FIG. 5, in an embodiment, the burner cover 20 further includes two side plates 22 respectively provided at both sides of the fire partition plate 21 in the width direction, and both side plates 22 are bent toward the same side relative to the fire partition plate 21.

[0061] In the present embodiment, the cross-sectional shape of the burner cover 20 is generally in an inverted U-shape. The metal mesh 30 can be welded to the surface of the fire partition plate 21 facing away from the counter-fire face of the fire partition plate 21, so that the metal mesh 30 is accommodated between the two side plates 22. As shown in FIG. 2, when the burner head 200 is assembled with the fire grate body 100, the two side plates 22 of the burner cover 20 can be inserted into the airflow channel 101 of the fire grate body 100, and the side plates 22 are fixed to the side walls of the fire grate body 100 by welding or riveting. The two side plates 22 and the fire partition plate 21 can be integrally bent and formed by a sheet metal plate, or can also be connected and fixed by welding, riveting, etc. In order to simplify the manufacturing process, in an embodiment, the burner head 200 is a sheet metal part, and the fire partition plate 21 and two side plates 22 are integrally bent and formed, and then the corresponding fire port 211 is punched out at the fire partition plate 21.

[0062] As shown in FIG. 6 and FIG. 7, in some embodiments, at least part of the side edge of the fire port 211 is provided with a convex portion 216 and/or a groove. By providing a convex portion 216 and/or a groove at the side edge of the fire port 211, on one hand, the contact surface between the flame and the surrounding air can be increased, so that the combustion is more complete, and on the other hand, the inner edge contour of the fire port 211 can be further extended, thereby increasing the circumference of the contact contour between the flame and the fire partition plate 21, making the flame more stable.

[0063] Usually, two adjacent fire ports 211 are separated by the second rib 215 or the first rib 214, that is, the second rib 215 or the first rib 214 constitutes part of the side edge of the fire port 211. Considering that the width of the second rib 215 and the width of the first rib 214 are usually narrow, in order to avoid the structural strength being greatly affected by the opening of the groove, a convex portion 216 may be provided at the edge of the second rib 215 and/or the first rib 214. In this way, the inner edge contour of the fire port 211 can be extended while ensuring the structural strength. In addition, when a part of the fire port 211 is correspondingly provided with flanges 212, the flange 212 can also be regarded as part of the side edge of the fire port 211, and a convex portion 216 may also be provided at the flange 212. The shape of the convex portion 216 can be designed as a hemispherical shape, a tooth shape or other shapes as needed.

[0064] For example, as shown in FIG. 7, in an embodiment, the fire partition plate 21 is provided with a first fire port 211a and a second fire port 211b, and the second fire port 211b is extended along the width direction of the fire partition plate 21, and two long sides of the second fire port 211b are respectively provided with two convex portions 216. For example, as shown in FIG. 6, in an embodiment, the fire partition plate 21 is provided with a third fire port 211c and a fourth fire port 211d provided alternately along the length direction, the opposite side edges of each third fire port 211c are correspondingly provided with convex portions 216. The arrangement of the convex portions 216 is not limited thereto, and the side edge of each fire port 211 may be provided with a convex portion 216. In addition, the number of convex portions 216 in a single fire port 211 may be one, two, or more. When the number of convex portions 216 in a single fire port 211 is an even number, the even number of convex portions 216 may be provided symmetrically or asymmetrically.

[0065] On the basis of the above embodiments, as shown in FIG. 3 and FIG. 5, in an embodiment, a side edge of the fire partition plate 21 is provided with flanges 212 at a position corresponding to at least part of the fire port 211, a notch 213 is formed between at least part of the flanges 212 and the corresponding side edge of the fire port 211, and part of the side edge of the metal mesh 30 is provided at a bottom side of the flange 212.

[0066] In this embodiment, by leaving a notch 213 between the flange 212 and the side edge of the fire port 211, the circumference of the contact profile between the flame and the fire partition plate 21 is increased, so that the flame burns more stably and the combustion noise is reduced. In addition, the side edge of the metal mesh 30 is usually uneven. When the metal mesh is provided with a plurality of layers, the uneven side edge is more obvious. If there is no flange 212, after the burner head 200 is assembled with the metal mesh 30, the side edge may have some large gaps and some small gaps, resulting in poor consistency. By the design of the flange 212, part of the side edge of the metal mesh 30 is located at the bottom side of the flange 212, that is, the side edge of the fire partition plate 21 where the flange 212 is provided can just cover the uneven part of the side edge of the metal mesh 30, so that the burning area consistency of each fire grate 1000 is more stable. In addition, adopting the design of flange 212 with notch 213 can also reduce the influence of flange 212 at the burning area, ensure sufficient burning area, and avoid excessive reduction of burning area due to penetrating flange 212, which may lead to an increase in CO (Carbon Monoxide) and NOx (Nitrogen Oxides) in the flue gas. In this way, the combustion stability can be further improved, the combustion noise can be reduced, the emission of nitrogen oxides can be reduced, and low-nitrogen combustion can be achieved.

[0067] For example, the side edge of the fire partition plate 21 corresponds to the position of one of the fire ports 211, and the flange 212 is located in the region enclosed by the fire port 211. In the length direction of the fire partition plate 21, the size of the flange 212 is smaller than the size between the two opposite side edges of the fire port 211, so that notches 213 are formed between the two ends of the flange 212 and two side edges of the fire port 211. One end of the flange 212 may be extended to connect with one side edge of the fire port 211, and a notch 213 is formed between the other end of the flange 212 and the other side edge of the fire port 211. In practical invention, the fire port 211 with the flange 212 may be directly punched out at the fire partition plate 21 made of sheet metal by a stamping process, and a notch 213 may be left between the flange 212 and the side edge of the fire port 211, which is simple and convenient to manufacture.

[0068] As shown in FIG. 1 and FIG. 2, the present application further proposes a fire grate 1000, which includes a fire grate body 100 and a burner head 200. The fire grate body 100 is provided with an airflow channel 101 and an air outlet 103 communicated with the airflow channel 101, and the burner head 200 is provided at the air outlet 103. The specific structure of the burner head 200 refers to the above embodiment. Since the fire grate 1000 adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0069] In this embodiment, the fire grate body 100 has an airflow channel 101 for passing fuel gas and air, and the two ends of the airflow channel 101 respectively have an air inlet 102 and an air outlet 103 that penetrate the surface of the fire grate body 100. In an embodiment, the air inlet 102 is provided at the lower side of the fire grate body 100, the air outlet 103 is provided at the top of the fire grate body 100, and the airflow channel 101 is provided in a curved shape. The burner head 200 is provided at the air outlet 103 of the fire grate body 100, and the mixed fuel gas and air in the airflow channel 101 are ejected via the air outlet 103 and burn at the fire port 211 of the burner head 200 to produce flames. In an embodiment, the fire grate body 100 is formed by splicing two roughly symmetrical sheet metal parts, the two sheet metal parts are subjected to corresponding pressing to form the airflow channel 101 inside, and the air outlet 103 is formed at the top of the two sheet metal parts.

[0070] As shown in FIG. 1 to FIG. 3, in an embodiment, the burner cover 20 further includes two side plates 22 respectively provided at both sides of the fire partition plate 21 in the width direction, the two side plates 22 are inserted into the airflow channel 101 and fixedly connected to the inner wall of the fire grate body 100; both sides of the width of the fire grate body 100 are provided with lateral convex bumps 104, and a side gas outlet channel communicated with the airflow channel 101 is formed between the lateral convex bumps 104 and the side plates 22, and the side of the side gas outlet channel away from the airflow channel 101 is open to form a flame stabilize port 105.

[0071] In this embodiment, during assembly, the burner head 200 is placed in the air outlet 103 of the fire grate body 100, and then the two side plates 22 are respectively welded and fixed to the two half shells of the fire grate body 100. By the cooperation between the burner head 200 and the fire grate body 100, the part of the air outlet 103 of the fire grate body 100 can be divided into a main gas outlet channel and side gas outlet channels located at both sides of the main gas outlet channel. In this way, the fuel gas and air are fully mixed in the airflow channel 101 of the fire grate body 100 to form a mixed gas, and the mixed gas is transported to the position of the burner head 200 for diversion. A part of the mixed gas is transported to the fire port 211 of the fire partition plate 21 via the main gas outlet channel to burn and form a main flame, and the other part of the mixed gas is output via the side gas outlet channels at both sides and burns at the flame stabilize port 105 to form a side flame. The side flames at both sides can stabilize the main flame at the fire partition plate 21, further improving the combustion stability.

[0072] In an embodiment, a plurality of lateral convex bumps 104 may be provided at intervals along the length direction of the fire grate body 100 at positions opposite to each side plate 22, and the lateral convex bumps 104 may be formed by stamping outward from the inner side of the fire grate body 100. A side gas outlet channel is formed between each lateral convex bump 104 and the side plate 22. In addition, a recessed portion concave toward the side plate 22 is formed between any two adjacent lateral convex bumps 104, and the recessed portion can just abut against the side plate 22 and form a weld position so as to weld the side plate 22 to the fire grate body 100.

[0073] The present application further proposes a gas device, which includes a fire grate 1000. The specific structure of the fire grate 1000 refers to the above embodiment. Since the gas device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0074] As an example, the gas device can be a burner, such as an atmospheric burner, a thick-lean burner, a water-cooled burner, or other forms of burners.

[0075] As an example, the gas device can also be a gas water heater, a boiler, or other equipment.

[0076] The above are only some embodiments of the present application, and are not intended to limit the scope of the present application. Under the concept of the present application, any equivalent structure transformation made by using the description and accompanying drawings of the present application, or directly or indirectly applied in other related technical fields, is included within the scope of the present application.