CN217302792U

CN217302792U - Fire grate, combustor and gas water heater

Info

Publication number: CN217302792U
Application number: CN202220297475.1U
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: 2022-08-26
Anticipated expiration: 2032-02-14
Also published as: WO2023151158A1; EP4273449A4; EP4273449A1; WO2022199700A1; WO2023151159A1; CN217356881U; CN217302793U; CN115200016A; CN115127104A; CN217503668U; US20230408147A1

Abstract

The utility model discloses a fire row, combustor and gas heater, wherein, fire row is including fire row monomer, supporting seat and burning panel, the technical scheme of the utility model through with the top burning panel by original structure of seting up the fire hole on the burning panel, changed into the structure that multilayer metal mesh formed the burning panel, set up like this and can reduce the atmospheric pressure intensity in the fire row, and then reduce the hot strength of burning panel department unit area. Simultaneously, the burning panel of multilayer metal mesh form makes the fire hole area of fire discharge burner increase for the air current of preliminary mixing has formed the abundant gas of mixing with the air of burning panel department after coming out from the burning panel with the air that follows, has formed stable and even flame in the top of burning panel at last. The utility model provides a heat load that the fire was arranged has increased substantially, and the adaptability scope has also correspondingly improved, and then the burning discharge flue gas performance in the twinkling of an eye is better, and the nitrogen oxide that produces after the burning is also lower.

Description

Fire grate, combustor and gas water heater

Technical Field

The utility model relates to a fluid heating equipment technical field, in particular to fire row, combustor and gas heater.

Background

In the related art, a burner is a core component of a gas water heater. The existing gas water heater burner adopts a fully premixed combustion technology, a shade combustion technology and a water-cooled combustion technology in the aspect of a low nitrogen oxide combustion technology, and the fire hole structure of the existing burner generally adopts a single-strip fire hole structure, the single-strip fire hole structure has high fire hole strength of combustion due to small fire hole area, the performance of flue gas discharged in instant combustion is poor, so that nitrogen oxide is higher, the requirement of low nitrogen emission performance can not be met, and therefore, the structure of the fire grate is necessarily improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a fire grate, aim at solving because the gas burning is insufficient in the combustor, and the nitrogen oxide's that the flue gas contains content is than higher, causes great pollution's technical problem to the environment.

In order to achieve the above object, the utility model provides a fire grate, this fire grate includes:

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

the supporting seat is sleeved at the upper end of the fire grate monomer; a mixing cavity is formed in the supporting seat and is communicated with the air outlet, an opening is formed in the upper part of the mixing cavity and corresponds to the air outlet;

the combustion panel is arranged at the opening; and the combustion panel is a multilayer metal mesh.

In an embodiment, the gas outlet is formed with a shunting portion integrally formed with the fire discharge unit, the shunting portion is provided with a plurality of shunting holes, 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, a flow splitting part integrally formed with the fire grate monomer is formed at the air outlet, and the flow splitting part comprises a first flow splitting area and at least two second flow splitting areas, the at least two second flow splitting areas are respectively arranged at two ends of the flow splitting part in the length direction, and the second flow splitting area is arranged between the two first flow splitting areas; 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 one embodiment, a plurality of first flow dividing holes are formed in the first flow dividing area, and the first flow dividing holes are arranged at intervals along the length direction of the fire grate; 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, a plurality of third distributing holes are formed in the second distributing area, the third distributing holes are arranged at intervals along the length direction of the fire grate, and a distributing rib is formed between any two adjacent third distributing holes; and at least two fourth flow distributing holes are formed in the flow distributing rib.

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 supporting seat comprises two side plates which are buckled with each other, and the two side plates are respectively provided with lateral convex hulls which are arranged along the length direction of the supporting seat at intervals.

In an embodiment, the lateral convex hull comprises an inner convex hull and at least two outer convex hulls; the inner convex hull is convex to the mixing cavity, and the at least two outer convex hulls are convex to the outer side of the fire grate; and the inner convex hull is arranged between the at least two outer convex hulls.

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

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.

In an embodiment, the support base is further provided with flame guide plates extending upwards, and the flame guide plates are arranged on two sides of the combustion panel in the width direction.

The utility model also provides a burner, the burner includes the fire grate, the fire grate includes fire grate monomer, supporting seat and burning panel, wherein, form the air vent channel in the fire grate monomer, and the top of the fire grate monomer is equipped with the gas outlet that communicates with the air vent channel; the supporting seat is sleeved at the upper end of the fire grate monomer; a mixing cavity is formed in the supporting seat and is communicated with the air outlet, an opening is formed in the upper part of the mixing cavity and corresponds to the air outlet; the combustion panel is arranged at the opening; 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 utility model also provides a gas water heater, this gas water heater includes aforementioned combustor, the combustor includes the fire row, this fire row includes fire row monomer, supporting seat and burning panel, wherein, form the air vent in the fire row monomer, and the top of fire row monomer is equipped with the gas outlet with the air vent intercommunication; the supporting seat is sleeved at the upper end of the fire grate monomer; a mixing cavity is formed in the supporting seat and is communicated with the air outlet, an opening is formed in the upper part of the mixing cavity and corresponds to the air outlet; the combustion panel is arranged at the opening; and the combustion panel is a multilayer metal mesh.

The technical scheme of the utility model through with the top combustion panel by original structure of seting up the fire hole on the combustion panel, changed into the structure that multilayer metal mesh formed the combustion panel, set up like this and can reduce the atmospheric pressure intensity in the fire row, and then reduce the thermal strength of combustion panel department unit area. Simultaneously, the burning panel of multilayer metal mesh form makes the fire hole area of fire discharge burner increase for the air current of initial mixing with from the burning panel back of coming out, have further mixed with the air of burning panel department, formed the abundant gas of mixing, finally, form stable and even flame in the top of burning panel. Therefore, compared with the prior art, the utility model provides a heat load that fire was arranged has increased substantially, and the adaptability scope is also corresponding to be improved, and then burns in the twinkling of an eye and discharges the flue gas performance better, and the nitrogen oxide that produces after the burning is also lower.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 view of an embodiment of the fire grate of the present invention;

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

FIG. 3 is a 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 row unit and the flow dividing part in 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 support seat shown in 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 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 structural 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 structural view of another embodiment of the fire grate of the present invention;

FIG. 24 is a cross-sectional view taken along line 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 realization, the functional characteristics and the advantages of the utility model are further explained by combining the embodiment and referring to the attached 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 some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

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

In addition, if there is a description relating to "first", "second", etc. in the embodiments 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, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions 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 bar-shaped shunting holes are processed on the shunting device, so that the structure of the shunting device is complex, and the defects of high processing difficulty and low processing efficiency exist.

In order to make the gas through the gas heater can fully burn to reduce the nitrogen oxide that the gas heater produced during operation, the utility model provides a fire row, please refer to fig. 1 and 3, fig. 1 shows the front view of an embodiment of the utility model discloses fire row, fig. 3 shows the cross-sectional view of fire row in fig. 1, fig. 2 shows the inner structure schematic diagram of fire row in detail.

In the embodiment of the present invention, as shown in fig. 1, the fire grate 10 includes a fire grate unit 100, a support seat 270 and a combustion panel 230, wherein a ventilation channel is formed in the fire grate unit 100, and the top of the fire grate unit 100 is provided with an air outlet 120 communicated with the ventilation channel; the supporting seat 270 is sleeved at the upper end of the fire grate unit 100; a mixing cavity 210 is formed in the support seat 270, the mixing cavity 210 is communicated with the air outlet 120, an opening is formed at the upper part of the mixing cavity 210, and the opening is arranged corresponding to the air outlet 120; the combustion panel 230 is arranged at the opening; 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, and the fire row 10 is one of the core components of the burner 20, wherein the structure of the fire row 10 plays a key role in the process of realizing low-nitrogen combustion by the burner 20 of the gas water heater. In the case of the fire grate 10, the fire grate 10 includes a fire grate block 100, a support base 270, and a combustion panel 230, wherein the fire grate block 100 forms a ventilation channel therein, the ventilation channel includes an air inlet 110 and an air outlet 120, the air inlet 110 is generally connected to an air flow source, the air flow source includes air and fuel gas, the fuel gas and the air enter the ventilation channel from the air inlet 110, the fuel gas and the air are premixed in the ventilation channel, then flow out from the air outlet 120, and then further mix through a mixing chamber 210 in the support base 270, finally achieve sufficient flow distribution at the combustion panel 230, which is substantially a multi-layer metal mesh, and finally be ignited above the combustion panel 230, and then form a stable and uniform flame.

Further, the supporting seat 270 provided in this embodiment is sleeved on the upper end of the fire grate unit 100; a mixing cavity 210 is formed in the support seat 270, the mixing cavity 210 is communicated with the air outlet 120, an opening is formed at the upper part of the mixing cavity 210, and the opening is arranged corresponding to the air outlet 120; a combustion panel 230 is disposed at the opening. The arrangement is such that the gas coming out of the fire grate 10, and in addition, the burner 20 using the fire grate 10 is plural, it is possible to reduce the mutual influence of flames between two adjacent fire grates 10.

Secondly, in order to further reduce the mutual influence of flames between adjacent fire rows 10, the support seat 270 is provided with flame guide plates 274 extending upwards, and the flame guide plates 274 are located at two 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, in order to ensure sufficient heat output from the burner 20, the height of the support base 270 should not be too high, and the specific height can be measured according to the actual product power without any limitation.

Additionally, in the embodiment of the present invention, the combustion panel 230 is set as a metal net, which can also improve the heat load of the fire grate 10, so that the adaptability range is improved, and the instantaneous combustion exhaust smoke performance is better, and the nitrogen oxide generated after the combustion is finally lower. Meanwhile, in order to secure the life of the combustion panel 230, considering that the temperature of the combustion place is high when the fuel is combusted, the multi-layered metal mesh should be a high temperature resistant material.

Furthermore, 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 of the metal mesh with a large mesh is small, and the number of layers of the metal mesh with a 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, 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 anger 10 piece tops, because this combustion panel 230 is the structure of multilayer metal mesh, 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, and 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 anger 10 monolithic, can solve the problem of use that the light load can not be low, make it reduce the segmentation, moreover, the steam generator is simple in structure, the manufacture is convenient, low cost, and can satisfy the operation requirement that the low nitrogen of complete machine discharged.

Further, in order to improve the strength of the multilayer metal mesh and improve flame combustion stability, in the multilayer metal mesh, the edges of the two opposite ends of at least one layer of metal mesh are bent to form bent portions, the bent portions can generate tension, and the strength of the bent metal mesh is higher. Here, the folded edge portions may be two sides in the width direction or two sides in the length direction, and from the viewpoint of the effect, the tension of the bending at the two ends in the length direction of the metal mesh is greater, and the strength of the corresponding metal mesh is also greater. Secondly, the portion of will bending meets with the portion of bending or the net of another layer to make and be formed with the interval between the adjacent two-layer metal mesh, set up like this, can make the air current flow through the resistance reduction of multilayer metal mesh, and then 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.

The technical scheme of the utility model through with top combustion panel 230 by the original structure of seting up the fire hole on combustion panel 230, changed into multilayer metal mesh and formed combustion panel 230's structure, set up like this and to reduce the atmospheric pressure intensity of arranging 10 in the fire, and then reduce combustion panel 230 and locate unit area's heat intensity. Meanwhile, the combustion panel 230 in the form of a multi-layer metal mesh increases the area of the fire hole of the fire outlet 10, so that the primarily mixed air flow is further mixed with the air at the combustion panel 230 after coming out of the combustion panel 230, thereby forming a fully mixed gas, and finally, forming stable and uniform flame above the combustion panel 230. Therefore, compared with the prior art, the utility model provides a heat load of fire row 10 has increased substantially, and the adaptability scope is also corresponding to be improved, and then the burning discharge flue gas performance is better in the twinkling of an eye, and the nitrogen oxide that produces after the burning is also lower.

Referring to fig. 1 to 3, in a preferred embodiment, the gas outlet 120 is formed with a flow dividing portion 220 integrally formed with the fire grate block 100, considering that the fire grate 10 generally has a high requirement for combustion in the middle area and has low requirements for flame at both ends. Gas outlet 120 department be formed with monomer 100 integrated into one piece's reposition of redundant personnel portion 220 is arranged to the fire, be provided with a plurality of diffluence holes on the reposition of redundant personnel portion 220, a plurality of diffluence holes are followed the length direction interval of reposition of redundant personnel portion 220 is arranged, just the trompil area of a plurality of diffluence holes reduces to both sides from the centre gradually. Or, the flow dividing part 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 part 220 in the length direction, and the second flow dividing areas 224 are disposed between the two first flow dividing areas 223; the first diversion area 223 and the at least two second diversion areas 224 are respectively provided with diversion holes, and the opening area of the first diversion area 223 is larger than the opening area of the at least two second diversion areas 224.

Whereas fire row 10 has a high requirement for combustion in the middle region, the two ends have a low requirement for flame. Therefore, the first flow dividing area 223 and the at least two second flow dividing areas 224 with different flow dividing amounts are provided, wherein the opening area of the first flow dividing area 223 in the middle area is larger than the opening area of the at least two second flow dividing areas 224 on two sides, and the first flow dividing area 223 with the larger opening area is arranged adjacent to the central area of the flow dividing part 220, which is beneficial to improving the combustion effect of the central area of the flow dividing part 220. Moreover, for the burner 20 composed of a plurality of fire rows 10, the second flow dividing regions 224 are provided in two and respectively adjacent to the two ends of the flow dividing portion 220 in the length direction, which is beneficial for the flame transmission between the ends of the adjacent fire row single bodies 100 through the upper part of the second flow dividing regions 224, thereby improving the ignition effect of the plurality of fire rows 10.

Further, a plurality of first flow dividing holes 223a are formed in the first flow dividing area 223, and the plurality of first flow dividing holes 223a are arranged at intervals along the length direction of the fire grate 10; a flow dividing rib 225 is formed between any adjacent two of the first flow dividing holes 223 a; the flow dividing rib 225 is provided with at least two second flow dividing holes 223 b. It can be understood that the flow dividing portion 220 mainly primarily divides the flow, and thus the area of the first flow dividing holes 223a can be set to be larger, 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 225, and the second flow dividing holes 223b are provided on the flow dividing rib 225, so as to further improve the uniformity of the flame.

In addition, the principle of the arrangement of the diversion holes in the second diversion area 224 and the first diversion area 223 is the same, a plurality of third diversion holes 224a are arranged on the second diversion area 224, the plurality of third diversion holes 224a are arranged at intervals along the length direction of the fire grate 10, and a diversion rib 225 is formed between any two adjacent third diversion holes 224 a; at least two fourth flow dividing holes 224b are formed in the flow dividing rib 225. Meanwhile, the two shunting holes are separated by the shunting rib 225, and the second shunting hole 223b is formed in the shunting rib 225, 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

flow dividing holes

223a and 223b in the first flow dividing region 223 and the third and fourth

flow dividing holes

224a and 224b in the second flow dividing region 224 may be specifically set according to the actual situation, for example, the first flow dividing region 223 may be provided with only two first flow dividing holes 223a, and the first flow dividing holes 223a extend along the length direction of the flow dividing portion 220 to form various holes; the second diverging section 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 section 220, and a plurality of second diverging holes 223b are arranged at intervals in the length direction of the diverging section 220, and so on. In addition, regarding the shape of the branch holes, the first branch hole 223a, the second branch hole 223b, the third branch hole 224a and the fourth branch hole 224b may be circular, square, strip-shaped and other regular or irregular shapes, none of the first branch hole 223a, the second branch hole 223b, the third branch hole 224a and the fourth branch hole 224b is specifically limited, and may be adjusted according to specific situations, and finally, the opening areas of the first branch hole 223a, the second branch hole 223b, the third branch hole 224a and the fourth branch hole 224b may be designed to match according to substantial power requirements.

Further, at least one of the flow dividing ribs 225 includes a first flow dividing wall 225a and a second flow dividing wall 225b inclined downward, bottom ends of the first flow dividing wall 225a and the second flow dividing wall 225b are connected, and a distance between the first flow dividing wall 225a and the second flow dividing wall 225b gradually increases outward from a connection of the first flow dividing wall 225a and the second flow dividing wall 225 b. It can be understood that, the setting of pushing down the middle part of reposition of redundant personnel portion 220 like this, such design, the reposition of redundant personnel hole that sets up on combining can make the air current not only go up, also go to both sides simultaneously, and then make flame more even.

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 225 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 middle.

Referring to fig. 1, 9 and 12, on the basis of the above embodiment, in order to increase the combustion rate of the fire row 10, the supporting seat 270 includes two side plates that are fastened to each other, and the two side plates are respectively provided with lateral convex hulls that 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 mixing chamber 210, and the at least two outer convex hulls 271 protrude towards the outer side of the fire grate 10; and the inner convex hull 272 is provided between the at least two outer convex hulls 271. 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 mixing chamber 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 named as a first side plate and a second side plate respectively 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 mixing chamber 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 duct between the outer wall of hybrid chamber 210, the secondary air inlet passageway between fire row 10 is guaranteed to outer convex closure 271. Preferably, for convenience of processing and convenience of arrangement and installation in a scenario where a plurality of fire grates 10 are used simultaneously, 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 unit 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 upward and outward in the vertical direction. The flame guide plate 274 is arranged on the top edges of the first side plate and the second side plate, so that the flame formed at the combustion panel 230 can be guided, the side flame is gathered towards the central area of the fire grate unit 100, and the heat gathering effect in the combustion process is improved.

Referring to fig. 1, 4 and 13, in an embodiment, in view of preventing the multi-layer metal net from softening and collapsing downwards during the combustion process of the flame, the opening is further provided with a reinforcing rib 240 fixedly connected with the combustion panel 230, and a plurality of the reinforcing ribs 240 are arranged at intervals along the length direction of the fire grate 10. Specifically, the connection of the combustion panel 230 to the plurality of ribs 240 is generally welding, and the most common welding is spot welding.

The ribs 240 are set so as to prevent the expanded metal from softening and collapsing downward, and therefore, the ribs 240 may be provided above, in the middle, or below the plurality of expanded metal layers. 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 mixing chamber 210 at the opening.

Referring to fig. 25, the present invention further provides a burner 20, the burner 20 includes the fire grate 10, 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 provided, and are not repeated herein.

In order to meet the requirement of higher heat, the number of fire rows 10 in the burner 20 may be multiple, and multiple 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 and instant heating.

The utility model discloses still provide a gas water heater, this gas water heater include combustor 20, and above-mentioned embodiment is referred to this combustor 20's concrete structure, because this gas water heater has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here.

The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A fire grate, comprising:

2. The fire grate of claim 1, wherein a splitter portion integrally formed with the fire grate monomer is formed at the gas outlet, and a plurality of splitter holes are formed in the splitter portion, are arranged at intervals along the length direction of the splitter portion, and have opening areas gradually decreasing from the middle to both sides.

3. The fire grate of claim 1, wherein the gas outlet is formed with a divided portion integrally formed with the fire grate monomer, the divided portion includes a first divided portion and at least two second divided portions, the at least two second divided portions are respectively provided at both ends of the divided portion in a length direction, and the second divided portion is provided between the two first divided portions; 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 the first flow dividing region is provided with a plurality of first flow dividing holes, the plurality of first flow dividing holes being spaced apart along the length of the fire grate; 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.

5. The fire grate of claim 4, wherein a plurality of third splitter holes are formed in the second splitter area, the third splitter holes are arranged at intervals along the length direction of the fire grate, and a splitter rib is formed between any two adjacent third splitter holes; and at least two fourth flow distributing holes are formed in the flow distributing rib.

6. The fire grate of claim 5 wherein at least one of the diverter ribs comprises first and second downwardly sloped diverter walls, the first and second diverter walls joined at their bottom ends, and the distance between the first and second diverter walls increases from the junction of the first and second diverter walls.

7. The fire grate of claim 1, wherein the support base comprises two side plates which are fastened to each other, and the two side plates are respectively provided with lateral convex hulls which are arranged at intervals along the length direction of the support base.

8. The fire row of claim 7 wherein the lateral convex hulls comprise an inner convex hull and at least two outer convex hulls; the inner convex hull is convex to the mixing cavity, and the at least two outer convex hulls are convex to the outer side of the fire grate; and the inner convex hull is arranged between the at least two outer convex hulls.

9. The fire grate of claim 1 wherein the opening is further provided with a plurality of ribs fixedly connected to the combustion panel, the plurality of ribs being spaced apart along the length of the fire grate.

10. A fire grate as claimed in any one of claims 1 to 8, characterized in that in the plurality of layers of metal mesh, the edges of at least one layer of metal mesh are bent to form folds.

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.