CN115200016A

CN115200016A - Fire grate, combustor and gas water heater

Info

Publication number: CN115200016A
Application number: CN202210135862.XA
Authority: CN
Inventors: 陈文风; 黄官贤; 梁国荣
Original assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Priority date: 2021-03-25
Filing date: 2022-02-14
Publication date: 2022-10-18
Also published as: CN217302793U; CN217356881U; WO2023151158A1; CN217503668U; CN115127104A; EP4273449A1; CN217302792U; WO2022199700A1; WO2023151159A1; US20230408147A1; EP4273449A4

Abstract

The invention discloses a fire grate, a burner and a gas water heater, wherein the fire grate comprises a fire grate body and a flow dividing device, a ventilation channel is formed in the fire grate body, and the top of the fire grate body is provided with a gas outlet communicated with the ventilation channel; the flow dividing device is arranged at the top of the fire grate body; the flow dividing device comprises a cavity with an open top surface, a flow dividing part and a combustion panel, the cavity is communicated with the air outlet, and the combustion panel is arranged at the open position; the flow dividing part is arranged in the cavity and is positioned below the combustion panel; set up reposition of redundant personnel portion in the below of burning panel, carried out preliminary reposition of redundant personnel with the air current of concentrating for air and gas further mix, then through the reposition of redundant personnel and the back of mixing that is multilayer metal mesh burning panel of essence, formed the abundant gas of mixing, then, form stable and even flame in the top of burning panel, make the burning of gas more abundant, and then make the nitrogen oxide that produces after the burning lower.

Description

Fire grate, combustor and gas water heater

Technical Field

The invention relates to the technical field of fluid heating equipment, in particular to a fire grate, a burner and a gas water heater.

Background

In the related art, a burner is a core component of a gas water heater. The existing gas water heater burner adopts the full-premixing combustion technology, the shade combustion technology and the water-cooling combustion technology in the aspect of low nitrogen oxide combustion technology, the existing burner fire hole structure usually adopts a single-strip fire hole structure, the single-strip fire hole structure has small fire hole area, the fire hole strength of combustion is high, the performance of flue gas discharged in instant combustion is poor, nitrogen oxide is higher, the requirement of low nitrogen emission performance cannot be met, and therefore, the structure of the fire emission of the existing gas water heater burner is necessarily improved.

Disclosure of Invention

The invention mainly aims to provide a fire grate, and aims to solve the technical problems that due to insufficient combustion of gas in a combustor, the content of nitrogen oxides in smoke is higher, and the environment is polluted greatly.

In order to achieve the above object, the present invention provides a fire grate, which comprises:

the fire grate comprises a fire grate body, wherein a ventilation channel is formed in the fire grate body, and the top of the fire grate body is provided with an air outlet communicated with the ventilation channel;

the flow dividing device is arranged at the top of the fire grate body; the flow dividing device comprises a cavity with an open top surface and a flow dividing part arranged in the cavity, and the cavity is communicated with the air outlet; the flow dividing part is positioned above the air outlet

A combustion panel disposed at the opening; the flow dividing part is positioned above the flow dividing part; and the combustion panel is a multilayer metal mesh.

In one embodiment, a plurality of shunting holes are arranged on the shunting portion, the shunting holes are arranged at intervals along the length direction of the shunting portion, and the opening areas of the shunting holes are gradually reduced from the middle to two sides. In one embodiment, the flow dividing portion includes a first flow dividing region and at least two second flow dividing regions, the at least two second flow dividing regions are respectively arranged at two ends of the flow dividing portion in the length direction, and the second flow dividing regions are arranged between the two first flow dividing regions; the first diversion area and the at least two second diversion areas are both provided with diversion holes, and the opening area of the first diversion area is larger than the opening area of the at least two second diversion areas.

In an embodiment, a plurality of first branch holes are formed in the first branch area, and the first branch holes are arranged at intervals along the length direction of the branch portion.

In one embodiment, a flow dividing rib is formed between any two adjacent first flow dividing holes; and at least two second shunting holes are formed in the shunting ribs.

In one embodiment, the inner wall of the first flow dividing hole is provided with a protrusion along the length direction of the flow dividing part.

In one embodiment, a plurality of third distributing holes are formed in the second distributing region, the third distributing holes are arranged at intervals along the length direction of the distributing part, and a distributing rib is formed between any two adjacent third distributing holes; and the flow distribution rib is provided with at least two fourth flow distribution holes.

In one embodiment, at least one of the flow dividing ribs includes a first flow dividing wall and a second flow dividing wall which are inclined downward, bottom ends of the first flow dividing wall and the second flow dividing wall are connected, and a distance between the first flow dividing wall and the second flow dividing wall gradually increases from a connection part of the first flow dividing wall and the second flow dividing wall.

In one embodiment, the opening is provided with reinforcing ribs, the reinforcing ribs are arranged at intervals along the length direction of the opening, and the combustion panel is fixedly connected with the reinforcing ribs.

In one embodiment, in the multiple layers of metal nets, the edge of at least one layer of metal net is bent to form a bent part.

The invention also provides a burner, which comprises the fire grate, a fire grate body, a flow dividing device and a combustion panel, wherein a ventilation channel is formed in the fire grate body, and the top of the fire grate body is provided with an air outlet communicated with the ventilation channel; the flow dividing device is arranged at the top of the fire grate body; the flow dividing device comprises a cavity with an open top surface and a flow dividing part arranged in the cavity, and the cavity is communicated with the air outlet; the flow dividing part is positioned above the gas outlet and arranged on the combustion panel at the opening; the flow dividing part is positioned above the flow dividing part; and the combustion panel is a multilayer metal mesh.

In one embodiment, the fire rows are multiple in number and are arranged in parallel.

The invention also provides a gas water heater, which comprises the burner, wherein the burner comprises a fire grate, the fire grate comprises a fire grate body, a flow dividing device and a combustion panel, a ventilation channel is formed in the fire grate body, and the top of the fire grate body is provided with an air outlet communicated with the ventilation channel; the flow dividing device is arranged at the top of the fire grate body; the flow dividing device comprises a cavity with an open top surface and a flow dividing part arranged in the cavity, and the cavity is communicated with the air outlet; the flow dividing part is positioned above the gas outlet and arranged on the combustion panel at the opening; the flow dividing part is positioned above the flow dividing part; and the combustion panel is a multilayer metal mesh.

According to the technical scheme, the top combustion panel is arranged into a structure with a plurality of layers of metal nets to form the combustion panel, so that the area of a fire hole of a fire outlet is increased, meanwhile, the flow dividing part is arranged below the combustion panel, concentrated airflow is preliminarily divided, air and fuel gas are further mixed, the fully mixed fuel gas is formed after the flow dividing and mixing of the combustion panel with the plurality of layers of metal nets are substantial, and then stable and uniform flame is formed above the combustion panel. Finally, the heat load of the fire grate is improved, the adaptability range is improved, the performance of instantly burning and discharging smoke is better, and the nitrogen oxide generated after burning is lower.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of a fire grate of the present invention;

FIG. 2 is a side view of FIG. 1;

FIG. 3 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;

FIG. 4 is another side view of FIG. 1;

FIG. 5 is a schematic structural view of the fire grate body and the flow divider of FIG. 1;

FIG. 6 is a side view of FIG. 5;

FIG. 7 is a sectional view taken along line B-B of FIG. 5;

FIG. 8 is another side view of FIG. 5;

FIG. 9 is a schematic view of the structure of FIG. 1;

FIG. 10 is a cross-sectional view C-C of FIG. 9;

FIG. 11 is a side view of FIG. 9;

FIG. 12 is another side view of FIG. 9;

FIG. 13 is yet another side view of FIG. 9;

FIG. 14 is a schematic structural view of another embodiment of the fire grate of the present invention;

FIG. 15 is a side view of FIG. 14;

FIG. 16 is a cross-sectional view taken along line D-D of FIG. 14;

FIG. 17 is a schematic structural view of an embodiment of the flow divider of FIG. 16;

FIG. 18 is a side view of FIG. 17;

FIG. 19 is another side view of FIG. 17;

FIG. 20 is a schematic view of another embodiment of the flow divider of FIG. 16;

FIG. 21 is a side view of FIG. 20;

FIG. 22 is a further side view of FIG. 20;

FIG. 23 is a schematic view of a fire grate in accordance with another embodiment of the present invention;

FIG. 24 is a cross-sectional view of E-E of FIG. 23;

FIG. 25 is a schematic structural view of an embodiment of the burner of the present invention;

FIG. 26 is a perspective view of FIG. 1;

FIG. 27 is a perspective view of FIG. 9;

FIG. 28 is a perspective view of FIG. 5;

FIG. 29 is a perspective view of FIG. 14;

fig. 30 is a perspective view of fig. 20.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front, rear, 8230; \8230;) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components in a specific posture (as shown in the figure), the motion situation, etc., and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, taking "A and/or B" as an example, including either the A aspect, or the B aspect, or both A and B satisfied aspects. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The flow dividing device of the burner in the related art is generally provided with a plurality of strip-shaped flow dividing holes with the same shape. On the one hand, because the area of single bar reposition of redundant personnel hole is less, the holistic flow area of diverging device is less, and the mixed gas pressure that leads to flowing through diverging device is great, and the burning intensity in the mixed gas combustion process is too high to make the mixed gas not fully burn, cause the content of the nitrogen oxide that forms in the combustion process higher. On the other hand, a plurality of strip-shaped shunting holes are processed on the shunting device, so that the structure of the shunting device 200 is complex, and the defects of high processing difficulty and low processing efficiency exist.

In order to fully combust gas passing through a gas water heater to reduce nitrogen oxides generated during the operation of the gas water heater, the invention provides a fire grate, and please refer to fig. 1 and 3, wherein fig. 1 shows a front view of an embodiment of the fire grate, fig. 3 shows a cross-sectional view of the fire grate in fig. 1, and fig. 2 shows an internal structure schematic diagram of the fire grate in detail.

In the embodiment of the present invention, as shown in fig. 1, 16 and 24, the fire grate 10 includes a fire grate body, a flow divider 200 and a combustion panel 230, wherein a ventilation channel is formed in the fire grate body 100, and the top of the fire grate body 100 is provided with an air outlet 120 communicated with the ventilation channel; the flow dividing device 200 is arranged at the top of the fire grate body 100; the flow dividing device 200 comprises a cavity 210 with an open top surface and a flow dividing part arranged in the cavity 210, and the cavity 210 is communicated with the air outlet 120; the flow dividing part 220 is located above the air outlet 110; a combustion panel 230 disposed at the opening; above the flow dividing portion 220; and the combustion panel 230 is a multi-layered metal mesh.

Specifically, the burner 20 is one of the core components of the gas water heater, the fire row 10 is one of the core components of the burner 20, and the burner 20 of the gas water heater plays a key role in the low nitrogen oxide combustion technology and the structure of the fire row 10. In the case of the fire grate 10, the fire grate 10 includes a fire grate body 100 and a flow divider 200, and the flow divider 200 is not an actual fire, air and gas mixed gas flow, and a vent passage is formed in the fire grate body 100, the vent passage includes an air inlet 110 and an air outlet 120, the air inlet 110 is generally connected to a gas flow source, the gas flow source includes air and gas, the gas and air enter the vent passage from the air inlet 110, the gas and air are premixed in the vent passage, flow out from the air outlet 120, are sufficiently mixed and divided in the flow divider 200, and finally are ignited above the flow divider 200, and then form a stable and uniform flame.

Further, the flow divider 200 includes a cavity 210 with an open top, a flow dividing portion 220 and a combustion panel 230, the flow dividing portion 220 is provided with a flow dividing hole, the gas and the air are premixed in the ventilation channel, and then flow out from the air outlet 120 and enter the cavity 210, and then respectively pass through the flow dividing hole of the flow dividing portion 220 and the flow dividing hole of the combustion panel 230, and finally are ignited above the combustion panel 230, and then a stable and uniform flame is formed.

In addition, in the embodiment of the present invention, in order to increase the heat load of the fire row 10 and improve the adaptability range thereof, so that the performance of the instantaneous combustion exhaust smoke is better, and finally, the nitrogen oxides generated after combustion are lower, the combustion panel 230 is made of metal mesh, wherein the temperature of the combustion position when the fuel is combusted is high, and in order to ensure the service life of the combustion panel 230, the multi-layer metal mesh needs to be a high temperature resistant material.

Next, considering that the open area of the metal mesh is large, in order to prevent accidents such as explosion of the burner 20 caused by backfire, the metal mesh is provided in multiple layers, the number of layers of the metal mesh is set to be related to the mesh number of the multiple layers of metal mesh, and the number of layers of the mesh in the multiple layers of metal mesh is inversely related to the mesh number of the mesh, that is, the number of layers corresponding to the metal mesh with a large mesh is small, and the number of layers corresponding to the small mesh is large, for example, the number of layers of the multiple layers of metal mesh includes but is not limited to 2 to 10 layers, and specifically, 2, 3, 5, 8, or 10 layers. The number of the metal nets usually used is 20 to 100, and specifically may be 20, 40, 50, 60, 80 or 100, and the preferred combination of the metal nets is 50 and 3 layers through test research considering that excessive layers may result in insufficient supply of airflow and the metal nets with larger meshes are expensive. So, be equipped with combustion panel 230 at row of a fire 10 top, because this combustion panel 230 is the structure of multilayer metal mesh, to the increase of fire hole area, it is better to make burning discharge flue gas performance in the twinkling of an eye, and can reduce nitrogen oxide's production, simultaneously, it has the flame stabilizing effect to adopt metal mesh fire hole structure, can improve the increase of the thermal load burning accommodation of row of a fire 10 monolithic, can solve the use problem that the little load can not be low, make it reduce the segmentation, moreover, the steam generator is simple in structure, the manufacture is convenient, therefore, the steam generator is low in cost, and can satisfy the operation requirement that the low nitrogen of complete machine discharged.

Furthermore, in order to improve the strength of the multilayer metal net and improve the flame combustion stability, the edges of two opposite sides of each layer of metal net are bent to form bent parts, the bent parts can generate tension, and the strength of the bent metal net is higher. Here, hem department can be width direction's both sides, also can be length direction's both sides, consider from the angle of effect, the tension that metal mesh length direction's both ends were bent is bigger, the intensity of metal mesh is also bigger, and simultaneously, the portion of bending of every layer of metal mesh and the portion of bending or the net of another layer meet, and be formed with the interval between the two-layer metal mesh that makes the jingle bell, set up like this, can make the air current flow through the resistance of multilayer metal mesh reduce, guarantee sufficient air current.

It will be appreciated that referring to fig. 3, 16 and 24, the fire row 10 sheet comprises two fire row single sheets, hereinafter referred to as a first single sheet and a second single sheet for convenience of description, and that one of the methods of manufacturing the fire row 10 is to weld a plurality of layers of metal mesh to the top ends of the first single sheet and the second single sheet, and to press and snap-fit the first single sheet and the second single sheet together so that the plurality of layers of metal mesh are disposed within the body of the fire row single sheets. The other method is that the first single sheet and the second single sheet are pressed flatly and buckled to form the fire grate unit 100, then the multilayer metal net is welded with the top of the supporting seat 270, the top of the supporting seat 270 is welded at the upper end of the fire grate unit 100, and finally edge covering is carried out. In this way, the combustion panel 230 is disposed outside the fire grate unit 100, and to some extent, the fire grate can be prevented from being tempered, thereby improving the safety of the fire grate 10.

In addition, in the process of manufacturing the fire grate body 100, the fire grate body 100 may be manufactured by means of clinching. Generally, a fire grate body comprises two fire grate 10 single pieces, which can be called as an A piece and a B piece for convenience of description, when the fire grate 10 single pieces are manufactured, the shapes of a first section and a second section are determined firstly, the shape of a third section is determined finally, the A piece and the B piece are subjected to stamping, injection molding or other means according to the formation of the first section, the second section and the third section to be formed, in the process, the third section of the fire grate 10 needs to be bent outwards to form 60 degrees, or 30 degrees, 45 degrees or 75 degrees, the formed A piece and B piece single pieces are subjected to press riveting to form the fire grate 10, and finally edge covering treatment is performed.

The invention discloses a fire grate 10, which comprises a fire grate body 100 and a flow dividing device 200, wherein a ventilation channel is formed in the fire grate body 100, and the top of the fire grate body 100 is provided with an air outlet 120 communicated with the ventilation channel; the flow dividing device 200 is arranged at the top of the fire grate body 100; the flow divider 200 comprises a cavity 210 with an open top, a flow dividing part 220 and a combustion panel 230, wherein the cavity 210 is communicated with the air outlet 120, and the combustion panel 230 is arranged at the open position; the flow dividing part 220 is arranged in the cavity 210 and is positioned below the combustion panel 230; wherein the combustion panel 230 is a multi-layer metal mesh. Thus, according to the technical scheme of the invention, the top combustion panel 230 is changed into a structure of the combustion panel 230 by a plurality of layers of metal nets from the original fire holes, so that the area of the fire holes of the fire outlet 10 is increased, meanwhile, the flow dividing part 220 is arranged below the combustion panel 230, concentrated airflow is preliminarily divided, so that air and gas are further mixed, then, after the flow dividing and mixing of the multi-layer metal net combustion panel 230 are substantially carried out, the gas which is fully mixed is formed, and then, stable and uniform flame is formed above the combustion panel 230. Finally, the heat load of the fire grate 10 is improved, the adaptability range is improved, the performance of instantly burning and discharging smoke is better, and the nitrogen oxide generated after burning is lower.

Referring to fig. 1, 5, 17 and 20, in an embodiment, the flow dividing portion 220 includes a first flow dividing area 223 and at least two second flow dividing areas 224, the at least two second flow dividing areas 224 are respectively disposed at two ends of the flow dividing portion 220 in the length direction, and the second flow dividing areas 224 are disposed between the two first flow dividing areas 223; wherein the open area of the first flow dividing region 223 is larger than the open area of the at least two second flow dividing regions 224.

It will be appreciated that since the fire bank 10 is generally more demanding for combustion in the central region, the requirements for flame at the two ends are less demanding. Therefore, the first flow splitting area 223 and the second flow splitting area 224 with inconsistent split flow are provided, wherein the opening area of the first flow splitting area 223 in the middle area is larger than the opening area of at least two second flow splitting areas 224 on two sides, and the first flow splitting area 223 with the larger opening area is arranged adjacent to the central area of the flow splitting part 220, which is beneficial to improving the combustion effect of the central area of the flow splitting part 220. Moreover, for the burner composed of a plurality of fire rows, the second flow dividing areas 224 are arranged in two and are respectively adjacent to the two ends of the flow dividing part 220 in the length direction, which is beneficial to the transmission of flame above the second flow dividing areas 224 between the ends of the adjacent fire row bodies 100, thereby improving the ignition effect of the plurality of fire rows.

Further, a plurality of first flow dividing holes 223a are formed in the first flow dividing region 223, and the plurality of first flow dividing holes 223a are arranged at intervals along the length direction of the flow dividing part 220; a flow dividing rib is formed between two adjacent first flow dividing holes 223 a; the flow dividing rib is provided with at least two second flow dividing holes 223b. It can be understood that, in the present embodiment, the flow dividing portion 220 is mainly used for preliminarily treating the flame, and thus, the area of the first flow dividing holes 223a can be set to be large, so as to reduce the number of the first flow dividing holes 223a, and at the same time, the two flow dividing holes are separated by the flow dividing rib, and the second flow dividing holes 223b are provided on the flow dividing rib, so that the uniformity of the flame can be further improved.

In addition, the second flow dividing region 224 and the first flow dividing region 223 are arranged in the same principle, a plurality of third flow dividing holes 224a are formed in the second flow dividing region 224, the plurality of third flow dividing holes 224a are arranged at intervals along the length direction of the flow dividing part 220, and a flow dividing rib is formed between two adjacent third flow dividing holes 224 a; the flow dividing rib is provided with at least two fourth flow dividing holes 224b. Meanwhile, the two shunting holes are separated by the shunting rib, and the second shunting hole 223b is formed in the shunting rib, so that the uniformity of flames at two ends of the fire grate 10 can be further improved.

It should be noted that, for only some of the above implementations, the number and arrangement of the first and

second shunt holes

223a and 223b in the first shunt area 223 and the third and

fourth shunt holes

224a and 224b in the second shunt area 224 may be specifically set according to actual situations, for example, the first shunt area 223 may be provided with only two first shunt holes 223a, and the first shunt holes 223a extend along the length direction of the shunt device 200 to form various holes; the second diverging region 224 may be provided with a plurality of third diverging holes 224a, and the plurality of third diverging holes 224a may be configured as various holes formed to extend in the width direction of the diverging device 200, and a plurality of second diverging holes 223b are arranged at intervals in the length direction of the diverging portion 220.

The first branch orifice 223a, the second branch orifice 223b, the third branch orifice 224a and the fourth branch orifice 224b may be circular, square, strip-shaped or other regular or irregular shapes, the first branch orifice 223a, the second branch orifice 223b, the third branch orifice 224a and the fourth branch orifice 224b are not limited and can be adjusted according to specific situations, and finally, the opening areas of the first branch orifice 223a, the second branch orifice 223b, the third branch orifice 224a and the fourth branch orifice 224b can be designed to be matched according to the actual power requirement.

Referring to fig. 3, 7 and 19, in the above embodiment, the flow dividing portion 220 includes a first flow dividing wall 225a and a second flow dividing wall 225b which are inclined downward, the bottom ends of the first flow dividing wall 225a and the second flow dividing wall 225b are connected, and the distance between the first flow dividing wall 225a and the second flow dividing wall 225b gradually increases from the connection point of the first flow dividing wall 225a and the second flow dividing wall 225 b. Specifically, the middle of the flow dividing part 220 is pressed downwards, and the design, in combination with the flow dividing holes arranged on the upper part, can make the airflow not only go upwards, but also go to both sides, so that the flame is more uniform.

Referring to fig. 20 to 22, on the basis of the previous embodiment, a plurality of first flow dividing holes 223a are formed in the first flow dividing region 223, the plurality of first flow dividing holes 223a are arranged at intervals along the length direction of the flow dividing portion 220, and a flow dividing rib is formed between two adjacent first flow dividing holes 223 a; the first diverging hole 223a is provided with a wave-shaped protrusion 226 along the length direction of the diverging part 220.

It can be understood that the area of the branching hole of the single first branching hole 223a is much larger than that of the single first branching hole 223a as compared with the previous embodiment, so that the requirement of the central region for heat can be satisfied, and at the same time, the first branching hole 223a is provided with a wave-shaped protrusion 226 along the length direction of the branching portion 220. These protrusions 226 may concentrate the flame toward the center.

Referring to fig. 1, 9 to 11, in a preferred embodiment, in order to further improve the stability and uniformity of the flame, the flow divider 200 further includes a support seat 270 disposed outside the cavity 210 for mounting the combustion panel 230.

Specifically, after the supporting seat 270 is arranged, the combustion panel 230 is arranged on the supporting seat 270, so that the two sides of the combustion panel are heightened to protect the multilayer metal nets and prevent the multilayer metal nets from being raised, and in addition, when the fire rows 10 work simultaneously to be multiple, the mutual influence of flames between two adjacent fire rows 10 can be reduced. Secondly, in order to further reduce the mutual influence of flames between adjacent fire rows 10, the support seat 270 is provided with upwardly extending flame guide plates 274, and the flame guide plates 274 are located at both sides of the width direction of the combustion panel 230. It is understood that the height of the flame guide plate 274 is not too high in order to secure the heat of flame combustion. In addition, it will be appreciated that the height of the support base 270 should not be too high in order to ensure sufficient heat output from the burner 20, and the specific height data should not be expanded too much here.

Referring to fig. 1, 4 and 13, in one embodiment, in view of preventing the multi-layer metal mesh from softening and collapsing downwards during the combustion process of the flame, the opening is provided with a reinforcing rib 240, a plurality of reinforcing ribs 240 are arranged at intervals along the length direction of the opening, and the combustion panel 230 is fixedly connected with the plurality of reinforcing ribs 240. Specifically, the connection of the combustion panel 230 to the plurality of ribs 240 is typically welding, most commonly spot welding.

The ribs 240 are provided above, in the middle, or below the plurality of layers of expanded metal in order to prevent the expanded metal from softening and collapsing downward. Specifically, the reinforcing rib 240 is welded to the supporting seat 270, or the reinforcing rib 240 is connected to the outer wall of the cavity 210 at the opening.

Referring to fig. 1, 9 and 12, on the basis of the above embodiment, in order to increase the combustion rate of the fire grate 10, the supporting seat 270 includes two side plates that are fastened to each other, the two side plates are respectively provided with lateral convex hulls, and the lateral convex hulls are arranged at intervals along the length direction of the supporting seat 270; wherein the lateral convex hull comprises an inner convex hull 272 and at least two outer convex hulls 271; the inner convex hull 272 protrudes towards the cavity 210, and the at least two outer convex hulls 271 protrude towards the outer side of the fire grate 10; the inner convex hull 272 is disposed between the at least two outer convex hulls 271.

For convenience of description, the two side plates are respectively named as a first side plate and a second side plate for description:

specifically, the first side plate and the second side plate are buckled with each other to form the side plate, a plurality of lateral convex hulls are respectively arranged along the length direction of the side plate, and the lateral convex hulls are arranged at intervals along the length direction of the first side plate or the second side plate. The lateral convex hull comprises an inner convex hull 272 and at least two outer convex hulls 271; the inner convex hull 272 protrudes towards the cavity 210, and the direction of the protrusions 226 of the at least two outer convex hulls 271 is opposite to the direction of the protrusions 226 of the inner convex hull 272; so, the design of interior convex closure 271 at first can make things convenient for the location when supporting seat 270 installs, secondly make supporting seat 270 with formed the ventilation channel between the outer wall of cavity 210, secondary air inlet channel between the fire row 10 is guaranteed to outer convex closure 271. Preferably, in order to facilitate processing and facilitate arrangement and installation in a scene of simultaneous use of the plurality of fire grates 10, the convex hulls of the first side plate and the lateral convex hulls of the second side plate are symmetrically distributed in the width direction of the fire grate body 100.

In addition, the first side plate and the second side plate are provided with flame guide plates 274 extending upwards; specifically, the flame guide plate 274 may be formed by extending the top edges of the first side plate and the second side plate to the upper outer side in the vertical direction. By providing the flame guide plate 274 on the top edge of the first side plate and the second side plate, the flame formed at the combustion panel 230 can be guided, so that the side flame is gathered towards the central area of the fire grate 10, which is beneficial to improving the heat gathering effect in the combustion process.

Referring to fig. 25, the present invention further provides a burner 20, the burner 20 includes the fire grate 10, and the specific structure of the fire grate 10 refers to the above embodiments, and since the burner 20 adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and are not described in detail herein.

In order to meet the requirement of larger heat, the number of the fire rows 10 in the burner 20 may be multiple, and a plurality of the fire rows 10 are arranged in parallel. It is understood that the number of fire rows 10 is at least two, and specifically, at least two first fire rows 10 are arranged in parallel. The increased number of fire rows 10 provides a corresponding increase in the area of the combustion interface, which may provide for rapid heating. If the burner 20 is applied to a gas water heater, the gas water heater can achieve the effect of water utilization by instant heating.

The invention further provides a gas water heater, which comprises a burner, the specific structure of the burner refers to the above embodiments, and the gas water heater adopts all the technical schemes of all the above embodiments, so that the gas water heater at least has all the beneficial effects brought by the technical schemes of the above embodiments, and the details are not repeated herein.

The above description is only an alternative embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, which are within the spirit of the present invention, are included in the scope of the present invention.

Claims

1. A fire grate, comprising:

2. The fire grate of claim 1, wherein the flow dividing portion is provided with a plurality of flow dividing holes, the plurality of flow dividing holes are arranged at intervals along the length direction of the flow dividing portion, and the opening area of the plurality of flow dividing holes is gradually reduced from the middle to two sides.

3. The fire grate of claim 1, wherein the flow dividing portion comprises a first flow dividing region and at least two second flow dividing regions, the at least two second flow dividing regions being respectively provided at both ends of the flow dividing portion in the length direction, the second flow dividing regions being provided between the two first flow dividing regions; the first diversion area and the at least two second diversion areas are respectively provided with a diversion hole, and the area of the opening of the first diversion area is larger than the area of the opening of the at least two second diversion areas.

4. The fire grate of claim 3 wherein a plurality of first splitter holes are provided in the first splitter zone, the plurality of first splitter holes being spaced apart along the length of the splitter section.

5. The fire grate of claim 4 wherein a flow dividing rib is formed between any adjacent two of the first flow dividing holes; and at least two second shunting holes are formed in the shunting ribs.

6. The fire grate of claim 5 wherein the inner wall of the first flow dividing hole is provided with a protrusion along the length of the flow dividing portion.

7. The fire grate of claim 6, wherein a plurality of third splitter holes are formed in the second splitter region, the third splitter holes are arranged at intervals along the length direction of the splitter portion, and a splitter rib is formed between any two adjacent third splitter holes; and the flow distribution rib is provided with at least two fourth flow distribution holes.

8. A fire grate as claimed in any one of claims 5 to 7 wherein at least one of the diverter ribs comprises first and second downwardly sloping diverter walls, the bottom ends of the first and second diverter walls being connected and the distance between the first and second diverter walls increasing progressively outwardly from the connection of the first and second diverter walls.

9. The fire grate of claim 1, wherein the opening is provided with a plurality of reinforcing ribs, the plurality of reinforcing ribs are arranged at intervals along the length direction of the opening, and the combustion panel is fixedly connected with the plurality of reinforcing ribs.

10. The fire grate of claim 1, wherein the edges of at least one of the layers of metal mesh are bent to form bends.

11. A burner, characterized in that it comprises a fire grate according to any one of claims 1 to 10; the fire row's quantity is a plurality of, and a plurality of the fire row is arranged side by side.

12. A gas water heater comprising a burner as claimed in claim 11.