CN114396621A

CN114396621A - Fire grate, combustor and gas water heater

Info

Publication number: CN114396621A
Application number: CN202111583316.4A
Authority: CN
Inventors: 孙运磊; 刘云; 郑涛; 刘联产
Original assignee: Qingdao Economic And Technology Development District Haier Water Heater Co ltd; Chongqing Haier Water Heater Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Economic And Technology Development District Haier Water Heater Co ltd; Chongqing Haier Water Heater Co Ltd; Haier Smart Home Co Ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-04-26

Abstract

The application belongs to the technical field of water heaters, and particularly relates to a fire grate, a burner and a gas water heater. The application aims at solving the problem that the gap between two adjacent fire rows at present forms a secondary air channel and the uniformity of secondary air is poor. The fire grate comprises an inner shell, an outer shell and a partition plate assembly, wherein the outer shell is positioned on the outer side of part of the inner shell, and a secondary air outlet branch passage is formed between the outer shell and the part of the inner shell on the inner side of the outer shell at intervals; the inner shell forms first and draws and penetrates passageway and secondary air inlet branch way, and secondary air inlet branch way and secondary air outlet branch way intercommunication form the secondary air passageway, provide secondary air for the burning, improve the sufficiency and the homogeneity of burning, improve the combustion effect. The baffle assembly is located on the inner side of the inner shell, an auxiliary air flow channel is formed between the baffle assembly and the inner shell at intervals, the baffle assembly forms a main air flow channel, and the main air flow channel is communicated with the first injection channel and the auxiliary air flow channel respectively and burns to form main flames and auxiliary flames respectively.

Description

Fire grate, combustor and gas water heater

Technical Field

The application belongs to the technical field of water heaters, and particularly relates to a fire grate, a burner and a gas water heater.

Background

The gas water heater is a gas appliance which takes gas as fuel, mixes air and the gas to generate high-temperature smoke through combustion in a combustion chamber by a combustor, and the high-temperature smoke flows through a heat exchanger to exchange heat with cold water in the heat exchanger so as to achieve the purpose of preparing hot water.

In the related art, the atmospheric burner uses a gap between two adjacent fire rows as a secondary air passage, and communicates with a secondary air hole provided at the bottom of the burner to supply secondary air for combustion.

However, a secondary air channel is formed in a gap between two adjacent fire rows, so that the two fire rows share air in the secondary air channel, the secondary air quantity is insufficient, the uniformity of the secondary air is poor, the combustion is uneven and insufficient, and the working efficiency is affected.

Disclosure of Invention

In order to solve the above-mentioned problem among the prior art, be the problem that the clearance between solving current adjacent two fire rows formed secondary air passageway, secondary air homogeneity poor promptly, the application provides a fire row, combustor and gas heater.

The fire grate comprises: the inner shell, the baffle plate assembly and the outer shell are coated on the outer side of part of the inner shell; a secondary air outlet passage is formed between the outer shell and part of the inner shell at intervals; the inner shell is positioned on the outer side of the partition plate assembly, a first injection passage and a secondary air inlet branch passage are formed in the inner shell, and the secondary air inlet branch passage is communicated with the secondary air outlet branch passage to form a secondary air passage; the baffle assembly forms a main air flow channel, an auxiliary air flow channel is formed between the baffle assembly and the inner shell at intervals, and the main air flow channel is communicated with the first injection channel and the auxiliary air flow channel respectively.

In an optional technical scheme of the fire grate, the partition plate assembly comprises a plurality of partition plates, the plurality of partition plates are parallel, and the plurality of partition plates are sequentially arranged along the thickness direction of the partition plates; at least partial areas of two adjacent baffles are provided with intervals to form the main air flow channel; two partition plates outside the partition plate assembly are defined as outer partition plates, partial areas of the outer partition plates are welded with the inner shells on two sides, and the auxiliary air flow channel is formed between the outer partition plates and the inner shells above the welding position; and a first through hole for communicating the auxiliary air flow channel and the main air flow channel is formed in the outer side clapboard above the welding position.

In the above optional technical solution of the fire grate, the top end of the baffle plate is provided with a first welding part, and the first welding parts of all the baffle plates are welded to form the baffle plate assembly; the first welding part divides the air outlet port of the main air flow channel into at least two main flame ports.

In an alternative aspect of the fire grate, the baffle plate assembly has a mid-plane, and the baffle plate assembly is symmetrical about the mid-plane; each of the bulkheads protrudes toward the mid-plane to form the first weld.

In an optional technical scheme of the fire grate, a second welding portion is arranged at the bottom end of the outer side partition plate, the second welding portion is welded with the partition plate adjacent to the inner side of the outer side partition plate, and the second welding portion is opposite to the first welding portion.

In an optional technical scheme of the fire grate, the bottom end of the outer side partition plate is located above the adjacent inner side partition plate of the outer side partition plate, the second welding portion extends downwards to form a second connecting strip, the second connecting strip extends to the bottom end of the adjacent inner side partition plate of the outer side partition plate, and the second connecting strip is welded with the adjacent inner side partition plate of the outer side partition plate.

In an optional technical scheme of the fire grate, at least one of two adjacent partition plates protrudes towards the interval of the two partition plates to form a support boss which is abutted.

In an optional technical scheme of the fire grate, the outer shell comprises two second side plates respectively positioned at two sides of the inner shell and a second connecting strip connected to the top ends of the two second side plates, and a secondary air outlet passage is formed between part of the second side plates and the inner shell at intervals; and partial area of the second side plate protrudes away from the inner shell to form a mounting boss.

The burner includes: the combustion rack is provided with an air inlet, an air mixing hole and a secondary air hole, the air mixing hole is communicated with the first injection channel, the secondary air hole is communicated with the secondary air inlet branch channel, the opening directions of the air mixing hole and the secondary air hole are the same, and the opening direction of the air inlet is different from the opening direction of the air mixing hole.

The gas water heater includes: the water tank is installed at the top end of the combustor, the fan is installed at the bottom end of the combustor, and an air outlet of the fan is communicated with an air inlet of the combustor.

As can be understood by those skilled in the art, the fire grate, the burner and the gas water heater of the application comprise an inner shell, an outer shell and a partition plate assembly, wherein the outer shell is positioned on the outer side of part of the inner shell, and a secondary air outlet passage is formed between the outer shell and the part of the inner shell on the inner side of the outer shell at intervals; the inner shell forms first and draws and penetrates passageway and secondary air inlet branch way, and secondary air inlet branch way and secondary air outlet branch way intercommunication form the secondary air passageway, provide secondary air for the burning, improve the sufficiency and the homogeneity of burning, improve the combustion effect. The baffle assembly is located on the inner side of the inner shell, an auxiliary air flow channel is formed between the baffle assembly and the inner shell at intervals, a main air flow channel is formed by the baffle assembly, and the main air flow channel is communicated with the first injection channel and the auxiliary air flow channel respectively. Thus, mixed gas of primary air and fuel gas enters the main gas flow channel through the first injection channel and is combusted to form main flame; part of the mixed gas enters the auxiliary gas flow channel and is combusted to form auxiliary flame. The secondary air channel of the embodiment of the application is arranged in the fire row, so that the interval between the fire rows can be reduced, and the structure of the combustor is more compact.

Drawings

Alternative embodiments of the fire row, burner and gas water heater of the present application are described below with reference to the accompanying drawings. The attached drawings are as follows:

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

FIG. 2 is a front view of a fire grate provided by an embodiment of the present application;

FIG. 3 is a sectional view A-A of FIG. 2;

FIG. 4 is a schematic structural diagram of a fire grate baffle plate assembly provided by an embodiment of the present application;

FIG. 5 is an exploded view of a baffle assembly of a fire bank provided in an embodiment of the present application;

FIG. 6 is a front view of a fire grate baffle plate assembly provided by an embodiment of the present application;

FIG. 7 is a cross-sectional view B-B of FIG. 6;

FIG. 8 is an enlarged schematic view of region P of FIG. 7;

FIG. 9 is a schematic structural view of an inner shell of a fire grate provided in an embodiment of the present application;

FIG. 10 is a schematic structural diagram of a combustor provided by an embodiment of the present application;

fig. 11 is an exploded view of a burner provided in an embodiment of the present application.

In the drawings: 1000: fire grate; 100: an inner shell; 110: a first injection passage; 111: a first stage; 112: a second stage; 113: a third stage; 114: a fourth stage; 115: a fifth stage; 120: secondary air inlet branch channel; 121: a gas passing plate portion; 1211: a second via hole; 130: a first side plate; 131: a first welding boss; 140: a clamping opening; 150: a first connection portion; 151: an abutment plane; 160: a welding area; 200: a housing; 201: a secondary air outlet branch channel; 210: a second side plate; 211: a first abutment boss; 212: a second abutment boss; 213: blocking the convex strips; 214: mounting a boss; 220: a second connecting strip; 300: a bulkhead assembly; 301: a main gas flow path; 302: an auxiliary airflow channel; 310: an inner partition plate; 320: an outer spacer; 321: a first via hole; 322: a second weld; 330: a first weld; 331: a main flame port; 341: a first support boss; 342: a second support boss; 343: a third support boss; 350: a second connecting strip; 410: a combustion rack; 411: air mixing holes; 412: a secondary air hole; 420: a combustion chamber housing; 421: an air inlet; 430: an air adjusting plate; 431: a first air regulating hole; 432: a second air regulating hole; 433: and a third air adjusting hole.

Detailed Description

First, it should be understood by those skilled in the art that these embodiments are merely for explaining technical principles of the embodiments of the present application, and are not intended to limit the scope of the embodiments of the present application. And can be adjusted as needed by those skilled in the art to suit particular applications.

Furthermore, it should be noted that in the description of the embodiments of the present application, the terms of direction or positional relationship indicated by the terms "inside" and "outside" and the like are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or member must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, should not be construed as limiting the embodiments of the present application.

Furthermore, it should be noted that, in the description of the embodiments of the present application, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meanings of the above terms in the examples of the present application can be understood by those skilled in the art as appropriate.

For partially premixed combustion, the fuel gas is partially mixed with the required air in advance, and the air is called primary air; then the mixed gas flows out from the fire hole, after ignition, part of the gas is firstly combusted by primary air to form a flame core of flame, which is also called an inner cone. The rest of the gas is mixed with the combustion products, and is subjected to diffusion transfer and reburning with the surrounding air, the mixed air is called secondary air, and the formed flame is commonly called an outer cone. The flame structure formed by the combustion is often a bunsen flame, and the burner formed by the combustion principle is called an atmospheric burner.

In the related art, the atmospheric burner uses a gap between two adjacent fire rows as a secondary air passage, and communicates with a secondary air hole provided at the bottom of the burner to supply secondary air for combustion. However, a secondary air channel is formed in a gap between two adjacent fire rows, so that the two fire rows share air in the secondary air channel, the secondary air quantity is insufficient, the uniformity of the secondary air is poor, the combustion is uneven and insufficient, and the working efficiency is affected.

In view of this, the embodiment of the present application provides a fire grate, a burner and a gas water heater, wherein a secondary air channel is integrated in the fire grate to provide secondary air for combustion, so as to improve the sufficiency and uniformity of combustion and improve the combustion effect; and the gap between adjacent fire rows can be reduced, so that the structure of the burner is more compact.

The preferred technical scheme of the fire grate, the burner and the gas water heater is described below with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of a fire grate provided in an embodiment of the present application; FIG. 2 is a front view of a fire grate provided by an embodiment of the present application; fig. 3 is a sectional view a-a in fig. 2.

With reference to fig. 1 to 3, an embodiment of the present application provides a fire grate, which includes: an inner casing 100, a diaphragm assembly 300, and an outer casing 200 covering a portion of the outer side of the inner casing 100.

Wherein, the outer shell 200 is located at the outer side of a part of the inner shell 100, a secondary air outlet channel 201 is formed between the outer shell 200 and the inner part of the inner shell 100, and the outer shell 200 and the other part of the inner shell 100 are connected, for example, welded. Two secondary air outlet branch channels 201 are provided, and the two secondary air outlet branch channels 201 are respectively positioned at two sides of the inner shell 100.

The inner casing 100 forms a first injection passage 110 and a secondary air inlet branch passage 120, and the secondary air inlet branch passage 120 and a secondary air outlet branch passage 201 are communicated to form a secondary air passage for providing secondary air for combustion. A partial area of the inner case 100 is located inside the outer case 200, another partial area of the inner case 100 is located outside the outer case 200, and specifically, a portion of the first injection passage 110 and the secondary air intake branch passage 120 are located inside the outer case 200.

The baffle assembly 300 is located inside the inner casing 100, an auxiliary air flow channel 302 is formed between the baffle assembly 300 and the inner casing 100 at an interval, the baffle assembly 300 forms a main air flow channel 301, and the main air flow channel 301 is respectively communicated with the first injection channel 110 and the auxiliary air flow channel 302. Thus, the mixed gas of the primary air and the fuel gas enters the main gas flow channel 301 through the first injection channel 110 and is combusted to form a main flame; part of the mixed gas enters the auxiliary flow path 302 and is combusted to form an auxiliary flame.

It can be understood that two auxiliary airflow channels 302 are provided, and are respectively located at two sides of the main airflow channel 301, so as to play a role in gathering the main flame; the secondary air outlet branch channels 201 are also provided with two secondary air outlet branch channels which are respectively positioned at the outer sides of the auxiliary air flow channels 302, so that secondary air is provided for combustion, the dispersion of auxiliary flames can be avoided, and the effect of gathering flames is achieved.

FIG. 5 is an exploded view of a baffle assembly of a fire bank provided in an embodiment of the present application; FIG. 6 is a front view of a fire grate baffle plate assembly provided by an embodiment of the present application; FIG. 7 is a cross-sectional view B-B of FIG. 6;

fig. 8 is an enlarged schematic view of the region P in fig. 7.

Referring to fig. 2, 3 and 4, a barrier plate assembly 300 according to an embodiment of the present invention includes a plurality of barrier plates, for example, an inner barrier plate 310 and an outer barrier plate 320 in fig. 4. The baffles are parallel and arranged in sequence along the thickness direction of the baffles, and at least partial areas of two adjacent baffles are provided with a main air flow channel 301 at intervals. In the drawing, four partitions are provided, and the four partitions are arranged at intervals in the Y-axis direction, and three main air flow passages 301 are formed. That is, when the baffle assembly 300 includes N baffles, the baffle assembly 300 forms N +1 primary air flow channels 301, where N is an integer greater than 2. The number of the partition plates of the partition plate assembly is not limited in the embodiment of the application.

Two of the outer partitions of the partition plate assembly 300 are defined as outer partitions 320, and the adjacent partition plate inside the outer partitions 320 is defined as an inner partition 310. The embodiment of the present application is described by taking the example that the partition plate assembly 300 includes two outer partition plates 320 and two inner partition plates 310, but this is not a limitation on the number of the partition plates.

A partial region of the outer partition 320 is welded to the inner casing 100 on both sides, and an auxiliary air flow passage 302 is formed between the partial outer partition 320 above the welding position and the inner casing 100. Referring to fig. 9, wherein fig. 9 is a schematic structural view of an inner shell of a fire grate provided in an embodiment of the present application, a first welding boss 131 is provided on an outer shell 200, and an outer partition 320 is welded to the first welding boss 131. A partial region of the housing 200 protrudes toward the separator assembly 300 to form a first welding boss 131, and the first welding boss 131 has a long bar shape extending in the X-axis direction. The first welding boss 131 is welded to the outer partition 320, so that the partition assembly 300 is fixedly connected to the inner casing 100, and the first injection passage 110 and the auxiliary flow passage 302 are separated by the first welding boss 131.

The outer partition 320 above the welding position is provided with a first through hole 321 that communicates the auxiliary air flow path 302 and the main air flow path 301. In this way, part of the mixed gas in the main gas flow channel 301 enters the auxiliary gas flow channel 302 through the first through hole 321, and the mixed gas in the auxiliary gas flow channel 302 is combusted at the gas outlet port of the auxiliary gas flow channel 302 to form the auxiliary flame.

The outlet port of the main gas flow channel 301 is flush with the outlet port of the auxiliary gas flow channel 302, so that the main flame and the auxiliary flame are combusted on the same plane, and the combustion effect is improved.

Referring to fig. 4 and 5, the top end of the separator is provided with a first welding part 330, and the first welding parts 330 of all the separators are welded to form a separator assembly 300; the first welding part 330 divides the outlet port of the main gas flow path 301 into at least two main flame ports 331.

First welding portions 330 are respectively formed on the inner and

outer separators

310 and 320, and the first welding portions 330 of all the inner separators 310 and the first welding portions 330 of all the outer separators 320 are welded to form the separator assembly 300.

One first welding portion 330 may be provided on each separator, or a plurality of first welding portions 330 may be provided on each separator, the plurality of first welding portions 330 being provided at intervals in the length direction of the separator. Illustratively, each separator is provided with four first welds 330, defined as ABCD from left to right. The first weld A on each baffle, the first weld B on each baffle, the first weld C on each baffle, and the first weld D on each baffle. The number of the first welding portions 330 is not limited in the embodiment of the present application.

Alternatively, the plurality of first welding parts 330 are uniformly spaced in the X-axis direction, such that the size of the formed main flame holes 331 is the same, and combustion of each flame is uniform. When M first welding portions 330 are provided on each partition, the outlet port of the main gas flow path 301 is divided into M +1 main flame ports 331, where M is an integer greater than or equal to 1.

The first ends of all the partition plates are fixedly connected, and the second ends of all the partition plates are fixedly connected, for example, welded, so as to be conveniently and fixedly connected with the end of the inner shell 100.

Referring to fig. 4 and 6, when the plurality of main ports 331 are formed, the first via holes 321 may be provided in various forms. Illustratively, the first via holes 321 are elongated holes extending along the X-axis direction, and one first via hole 321 corresponds to one main flame vent 331, so that the first via hole 321 is conveniently processed. Illustratively, each of the main flame holes 331 corresponds to a plurality of first through holes 321, and the plurality of first through holes 321 are uniformly spaced along the X-axis direction, so that the mixture gas can be further uniform when passing through the first through holes 321, and the uniformity of combustion is further improved.

In some possible implementations, a protruding bump is provided on the separator, and the bump is welded to form the first welding portion 330. The welding can be realized through the arrangement, and the space between two adjacent partition plates is guaranteed.

In other possible implementations, in conjunction with fig. 7 and 8, the diaphragm assembly 300 has a mid-plane O about which the diaphragm assembly 300 is symmetrical. Each baffle projects towards the median plane O to form a first weld 330, the outer baffle 320 projects towards the median plane O to form a first weld 330, and the inner baffle 310 projects towards the median plane O to form a first weld 330, it being understood that the inner baffle 310 is at a short distance from the median plane O and has a small projection; the outside spacer 320 is far from the middle plane O and has a large protrusion size. The arrangement is simple and convenient to process, and cost is saved.

In order to ensure the distance between two adjacent partition plates, the embodiment of the application protrudes towards the interval of the two adjacent partition plates on at least one of the two adjacent partition plates to form abutting support bosses.

Referring to fig. 5 and 8, a partial region of the outer spacer 320 protrudes toward the inner spacer 310 to form a first support protrusion 341, and the first support protrusion 341 abuts against the inner spacer 310 to ensure a space between the outer spacer 320 and the inner spacer 320. The first supporting bosses 341 may be circular bosses, elliptical bosses, elongated bosses, or the like, one or more first supporting bosses 341 may be provided, and the plurality of first supporting bosses 341 are provided at intervals in the X-axis direction. Referring to fig. 5 and 6, the first support protrusion 341 is circular, and two first support protrusions 341 are disposed at two ends of the outer partition 320. The shape, number, and arrangement of the first supporting bosses 341 are not limited in the embodiment of the present application.

With reference to fig. 5 and 8, a partial area of the inner partition plate 310 protrudes toward the middle plane O to form a second supporting protrusion 342, and the second supporting protrusions 342 of the two inner partition plates 310 abut against each other to ensure the space between the two inner partition plates 310. The second supporting bosses 342 may be circular bosses, elliptical bosses, elongated bosses, or the like, one or more second supporting bosses 342 may be provided, and the plurality of second supporting bosses 342 are spaced apart from each other in the X-axis direction. Referring to fig. 5 and 6, the second support bosses 342 are elongated bosses extending in the Z direction, five second support bosses 342 are provided, and one second support boss 342 is provided for each of the main flame ports 331. The shape, number and arrangement of the second supporting bosses 342 are not limited in the embodiment of the present application.

Referring to fig. 5 and 8, a part of the area of the inner partition plate 310 protrudes toward the middle plane O to form a third supporting protrusion 343, and the third supporting protrusions 343 of the two inner partition plates 310 abut against each other to ensure the space between the two inner partition plates 310. The third support bosses 343 may be circular bosses, elliptical bosses, elongated bosses, or the like, one or more third support bosses 343 may be provided, and the plurality of third support bosses 343 are provided at intervals in the X-axis direction. Referring to fig. 5 and 6, the third support protrusions 343 are circular protrusions, four third support protrusions 343 are provided, and each of the first welding parts 330 corresponds to one third support protrusion 343. The shape, number and arrangement of the third supporting protrusions 343 are not limited in the embodiment of the present application.

The baffle of this application embodiment not only is favorable to guaranteeing the interval between two adjacent baffles through setting up the support boss, can also play the effect of strengthening the baffle intensity, can play the effect that blocks air current, even air current again.

With reference to fig. 4 to 6, a second welding portion 322 is disposed at a bottom end of the outer partition 320, and the second welding portion 322 is welded to a partition adjacent to an inner side of the outer partition 320, that is, the second welding portion 322 is welded to the inner partition 310, so as to further improve structural strength and stability of the partition assembly 300.

Optionally, the second welding portion 322 is opposite to the first welding portion 330, and the second welding portion 322 corresponds to the first welding portion 330 one to one, so that the stress on the upper end and the lower end of the outer partition 320 is balanced, and the stability of the structure is ensured.

Optionally, a partial area of the outer partition 320 protrudes toward the inner partition 310 to form a second welding portion, so that the arrangement and the processing are simple and convenient, and cost saving is facilitated.

With continued reference to fig. 4 to 6, the bottom end of the outer partition 320 is located above the adjacent partition inside the outer partition 320, that is, the bottom end of the outer partition 320 is higher than the bottom end of the inner partition 310, so that a partial area of the bottom of the inner partition 310 is exposed outside. The second welding portion 322 extends downward to form a second connection strip 350, the second connection strip 350 extends to the bottom end of the inner adjacent partition board of the outer partition board 320, and the second connection strip 350 is welded to the inner adjacent partition board of the outer partition board 320. That is, the second connection bar 350 is welded to the inner separator 310, and the second connection bar 350 is an L-shaped bar.

The present embodiment is configured such that the bottom end opening of the baffle plate assembly 300 is not flush, thereby forming a barrier to the airflow, so that the airflow is divided therein to enter the different main flame ports 331, respectively.

Referring to fig. 1 to 3, the outer casing 200 includes two second side plates 210 respectively located at two sides of the inner casing 100 and a second connecting bar 220 connected to top ends of the two second side plates 210, and a secondary air outlet channel 201 is formed between a portion of the second side plates 210 and the inner casing 100 at an interval; the second connecting strip 220 is connected with the top ends of the second side plates 210 on two sides respectively, so that the distance between the two second side plates 210 can be ensured, and the size of the air outlet port of the secondary air outlet channel 201 is prevented from being influenced. Optionally, the second connecting strips 220 are provided in a plurality, and the plurality of second connecting strips 220 are uniformly arranged at intervals along the X-axis direction, so as to further improve the structural strength and stability of the top end port of the second side plate 210.

A partial area of the second side plate 210 protrudes away from the inner case 100 to form a mounting boss 214. When arranging at the combustor in, the installation boss 214 butt of two adjacent fire rows improves the convenience and the accuracy of fire row installation, is favorable to guaranteeing the interval between two adjacent fire rows. The mounting bosses 214 may be circular bosses, elliptical bosses, polygonal bosses, or the like, one mounting boss 214 may be provided, a plurality of mounting bosses 214 may be provided, and the plurality of mounting bosses 214 are provided at intervals along the X-axis direction. The shape, number and arrangement of the mounting bosses 214 are not limited in the embodiment of the present application.

A partial region of the second side plate 210 protrudes toward the inner case 100 to form a first abutting projection 211 and a second abutting projection 212, and the first abutting projection 211 abuts against the inner case 100 at the upper and lower ends of the first welding projection 131. The second abutting boss 212 is located below the first abutting boss 211, and the second abutting boss 212 abuts against the first side plate 130 forming the first ejection passage 110.

The first abutment boss 211 may be an elongated boss extending in the Z-axis direction. The first abutment projection 211 may be provided in plural, and the plural first abutment projections 211 are provided at intervals in the X-axis direction. Combine fig. 1 and fig. 2, wherein be provided with separation sand grip 213 between two adjacent first butt bosss 211, have the interval between separation sand grip 213 and the inner shell 100, this application embodiment plays the effect of blockking to the air current through the separation sand grip 213 that sets up, avoids the air current too big.

The shape, number and arrangement of the first abutment bosses 211 are not limited by illustration.

The second abutment boss 212 may be semicircular, elliptical, polygonal, etc., and the shape, number, and arrangement of the second abutment boss 212 are not limited in the embodiments of the present application.

This application embodiment makes second side plate 210 and inner shell 100 between keep the interval through set up first butt boss 211 and second butt boss 212 on second side plate 210, guarantees the size of secondary air outlet branch way 201 promptly, and first butt boss 211 and second butt boss 212 can also play the effect that blocks the air current moreover, are favorable to guaranteeing the homogeneity that the secondary air is given vent to anger.

Optionally, the end surface of the top end of the second side plate 210 of the casing 200 protrudes out of the air outlet port of the main air flow channel 301, so that secondary air can be limited, the main flame is drawn close to the middle, and the flame combustion gathering effect is improved.

Referring to fig. 1 to 3 and 9, the inner casing 100 includes two opposite first side plates 130, and partial regions of the two first side plates 130 are connected, and partial regions of the two first side plates 130 have a first injection passage 110 and a secondary air intake branch passage 120 formed at an interval. The right and bottom ends of the two first side plates 130 are connected, for example, welded, hemmed, etc. The left side partial areas of the two first side plates 130 are connected, and the partial areas form the air inlet port of the first injection passage 110 and the air inlet port of the secondary air inlet branch passage 120. The top ends of the two first side plates 130 are spaced to form ports for flame combustion.

Optionally, the air inlet port of the first injection passage 110 is flush with the air inlet port of the secondary air inlet branch passage 120, so that the uniformity of air entering the first injection passage 110 and the secondary air inlet branch passage 120 can be improved, and the convenience of connection of the fire grate and the combustion frame of the combustor is improved.

The inner case 100 has opposite first and second sides, i.e., left and right sides in the direction shown in fig. 1. Referring to fig. 1, the second side of the inner casing 100 is provided with a fastening opening 140 for fastening to a burning rack, and the top end of the second side of the inner casing 100 is fastened to the burning rack, so that the second side of the fire grate is fixed to the burning rack. The first side of the outer shell 200 and the first side of the inner shell 100 are fixedly connected to form a first connecting portion 150, the bottom surface of the first connecting portion 150 forms an abutting plane 151 abutted to the combustion rack, the top end of the first connecting portion 150 is clamped with the combustion rack, and the first side of the fire grate is fixed on the combustion rack. From this, the stable installation of row of fires is on burning frame, and the mounting means is simple reliable.

With continued reference to fig. 9, the end of the secondary air intake branch 120 away from the intake port is recessed inward to form a gas passing plate 121, and the gas passing plate 121 is provided with a second through hole 1211. The left end of the secondary air inlet branch passage 120 is an air inlet port thereof, the side wall of the right end of the secondary air inlet branch passage 120 is recessed inwards to form a gas passing plate part 121, and the gas passing plate part 121 is arranged at two sides of the secondary air inlet branch passage 120. The air plate portion 121 is a flat plate portion, which facilitates processing of the second via 1211. The second through hole 1211 is used to communicate the secondary air inlet sub-channel 120 and the secondary air outlet sub-channel 201. The second via 1211 may be provided in one, and the second via 1211 may be provided in plural, for example, two. The shape of the second via 1211 may be arbitrary, for example, the second via 1211 is a kidney-shaped hole. The shape, number and arrangement of the second vias 1211 are not limited in this embodiment.

This application embodiment conveniently sets up second via 1211 through setting up air board portion 121, and air board portion 121 still makes the cross sectional area of secondary air inlet lane 120 right-hand member be less than the cross sectional area of its left end moreover, is favorable to improving secondary air's velocity of flow for secondary air gets into secondary air outlet lane 201 fast. Wherein, the cross section of the secondary air inlet branch passage 120 is a plane formed by YZ plane cutting.

With reference to fig. 3 and 9, the first injection passage 110 of the embodiment of the present application includes a first section 111, a second section 112, a third section 113, a fourth section 114, and a fifth section 115 that are connected to each other. The left end of the first section 111 is an air inlet of the first injection passage 110, and the first section 111 extends along the X-axis direction. The left end of the first section 111 is communicated with the second section 112, and the first section 111 and the second section 112 are tangent, so that the mixed gas flows more smoothly. The third section 113 is communicated with the second section 112, the third section 113 is approximately triangular, and the cross-sectional area of the third section 113 is gradually reduced from left to right. The first section 111, the second section 112 and the third section 113 are substantially shaped as a U-shaped channel open to the left. Moreover, the secondary air inlet branch passage 120 is located in the U-shaped channel, and the first side plate 130 between the secondary air inlet branch passage 120 and the U-shaped channel is in contact welding, so that the second side plate 210 is conveniently welded with the first side plate 130, and the secondary air outlet branch passage 201 is favorably formed.

The fourth section 114 is communicated with the third section 113, and the fourth section 114 extends along the X-axis direction, so that the mixed gas can enter the main gas flow passage 301 along the X-axis direction. The fifth section 115 communicates with the fourth section 114, the fifth section 115 extends in the X-axis direction, and the fifth section 115 is located above the fourth section 114.

The distance between the two first side plates 130 on both sides of the first section 111, i.e. the dimension of the first section 111 in the Y direction, is defined as a first interval; the distance between the two first side plates 130 on both sides of the second section 112, i.e. the dimension of the second section 112 along the Y direction, is defined as a second interval; the distance between the two first side plates 130 at two sides of the third section 113, i.e. the dimension of the third section 113 along the Y direction, is defined as a third interval; the distance between the two first side plates 130 at two sides of the fourth section 114, i.e. the dimension of the fourth section 114 along the Y direction, is defined as a fourth interval; the distance between the two first side plates 130 on both sides of the fifth section 115, i.e., the dimension of the fifth section 115 in the Y direction, is defined as a fifth interval.

Wherein the second spacing is less than the first spacing, such that a welding region of the housing 200 is formed at the sidewall of the second section 112; the third interval is smaller than the second interval, so that the first side plate 130 and the second side plate 210 forming the third section 113 are spaced from each other, and the secondary air outlet channel 201 is conveniently formed. The fourth interval is smaller than the third interval and is set such that the cross-sectional area of the fourth section 114 is smaller than that of the third section 113, so that the flow rate and pressure of the mixed gas flow therein are changed, thereby making the mixed gas more uniform in the X direction after passing through the fourth section 114, so that the mixed gas can be uniformly combusted in the X direction. The fifth interval is larger than the fourth interval, so that the bottom end of the partition plate assembly 300 can be avoided, and interference is avoided; moreover, a large amount of mixed gas can enter the main gas flow channel 301, and the smoothness of the mixed gas circulation is improved.

The first side plate 130 forming part of the secondary air inlet branch passage 120, part of the first injection passage 110 and the auxiliary air passage 302 has a gap with the housing 200 to form the secondary air outlet branch passage 201.

With particular reference to fig. 3 and 9, the second side plate 210 is welded to the first side plate 130 by the weld region 160. Where the welding region 160 includes six dashed oval regions in fig. 9, it should be understood that the dashed oval regions are only a rough limitation on the position and range of the welding region 160, and are not to be understood as a limitation on the specific position and range of the welding region 160 in the embodiments of the present application. Welding the region of the first connection part 150 at the left side of the outer case 200 and the inner case 100, the first partial region at the left end of the secondary air intake branch passage 120, the second partial region between the first partial region and the region of the first connection part 150, the third partial region at the lower part of the secondary air intake branch passage 120, the partial region of the second section 112, and the fourth partial region at the right side of the inner case 100, such that the outer case 200 and the inner case 100 are fixedly connected; the bottom end of the outer casing 200 is opened to match the top port of the inner casing 100, forming the outlet port of the secondary air outlet channel 201.

Therefore, the other partial area of the U-shaped channel, the third segment 113 and the partial area above the third segment, and the shell 200 have a gap to form a secondary air outlet channel 201. When the secondary air passes through the divided passage of the corresponding portion of the fourth segment 114, the passage of the segment extends in the X-axis direction, so that the secondary air can be uniformly distributed in the X-axis direction. In addition, the cross-sectional area of the secondary air outlet channel 201 is changed at the corresponding part of the fifth section 115, the corresponding part of the first welding boss 131 and the corresponding part of the upper region of the first welding boss 131, so that the flow speed and the pressure of the secondary air are changed, the secondary air is more uniform in the X-axis direction, and the improvement of the combustion uniformity is facilitated.

It should be noted that the cross sections of the first ejection passage 110 and the sections of the secondary air outlet channel 201 refer to the sections cut by the YZ plane.

FIG. 10 is a schematic structural diagram of a combustor provided by an embodiment of the present application; fig. 11 is an exploded view of a burner provided in an embodiment of the present application.

Referring to fig. 10 and 11, embodiments of the present application provide a burner comprising: a combustion frame 410 and a fire grate 1000, wherein the fire grate 1000 is arranged on the combustion frame 410. Wherein, fire arrange 1000 is provided with a plurality ofly, and a plurality of fire arrange 1000 along Y axle direction interval arrangement. Only one fire row 1000 is shown in fig. 1 and 2, and in practice, the number of fire rows 1000 is the same as the number of air mixing holes 411 provided in the burner block 410.

The combustion frame 410 is provided with a gas mixing hole 411 and a secondary air hole 412, and the gas mixing hole 411 is communicated with the first injection passage 110 so as to input mixed gas into the first injection passage 110; the secondary air hole 412 communicates with the secondary air inlet branch passage 120 to input secondary air to the secondary air outlet branch passage 201.

The combustion frame 410 can balance mixed gas entering each fire row 1000 by arranging the gas mixing holes 411, and the secondary air holes 412 can balance secondary air entering each fire row 1000, so that the combustion uniformity among each fire row 1000 is improved.

In order to further improve the uniformity of combustion, the burner of the embodiment of the present application further includes an air adjusting plate 430, the air adjusting plate 430 is fixed on the combustion frame 410, and the air adjusting plate 430 is attached to the side plate of the combustion frame 410, which is provided with the air mixing hole 411 and the secondary air hole 412. In addition, the air regulating plate 430 is provided with a second air regulating hole 432 facing the air mixing hole 411, a third air regulating hole 433 facing the secondary air hole 412, and a first air regulating hole 431 located below the second air regulating hole 432. The first air adjusting hole 431, the second air adjusting hole 432 and the third air adjusting hole 433 are rectangular holes. The embodiment of the application is provided with the air adjusting plate 430 for improving the uniformity of the air flow among the uniform fire rows 1000.

The burner of the embodiment of the present application further includes a combustion chamber housing 420 located at an outer side of the combustion frame 410 and the register plate 430 to form a combustion space. The combustion chamber housing 420 is provided with an air inlet 421, and the air inlet 421 is communicated with an air outlet of a fan of the gas water heater.

In the embodiment of the present application, the opening directions of the air mix holes 411 and the secondary air holes 412 are the same. The opening direction of the air inlet 421 is different from the opening direction of the air mixing hole 411, so that the air entering from the air inlet 421 enters the air mixing hole 411 and the secondary air hole 412 through a section of channel, and the condition that the air of the air inlet 421 directly blows to the air mixing hole 411 and the secondary air hole 412 to affect the combustion uniformity can be avoided.

As shown in fig. 10 and 11, the opening direction of the air mix hole 411 and the secondary air hole 412 is the negative direction of the X axis, and the opening direction of the air inlet 421 is the positive direction of the Z axis. At this time, a first cavity is formed between the bottom of the combustion frame 410 and the bottom of the combustion chamber housing 420, and a second cavity is formed between the air adjusting plate 430 and the combustion chamber housing 420 at an interval, so that the air of the air inlet 421 enters the first cavity, and enters the second cavity after primary uniform airflow passes through the first air adjusting hole 431; then, part of the air enters the first injection passage 110 after passing through the second air adjusting hole 432 and is uniformly flowed again, and part of the air enters the secondary air inlet branch passage 120 after passing through the third air adjusting hole 433 and is uniformly flowed again.

This application embodiment is through setting up first air register hole 431, second air register hole 432 and third air register hole 433 on air register plate 430, carries out dual regulation to the air, improves the homogeneity that enters into the air of every fire row 1000 to the homogeneity of combustion is increaseed.

The embodiment of this application still provides a gas heater, and it includes: the combustor of water tank, fan and above-mentioned embodiment, the water tank is installed on the top of combustor, and the bottom at the combustor is installed to the fan, and the air outlet of fan and the air intake intercommunication of combustor, the fan provides the air for the combustor burning, and the fire row of combustor burns the high temperature flue gas and the water tank heat transfer that forms to water in the heating water tank.

In summary, the fire grate 1000 of the gas water heater of the embodiment of the present application includes the inner shell 100, the outer shell 200 and the partition assembly 300, wherein the outer shell 200 is located outside a portion of the inner shell 100, and a secondary air outlet channel 201 is formed between the outer shell 200 and the portion of the inner shell 100 inside the outer shell 200 at an interval; the inner shell 100 forms a first injection passage 110 and a secondary air inlet branch passage 120, the secondary air inlet branch passage 120 is communicated with a secondary air outlet branch passage 201 to form a secondary air passage, secondary air is provided for combustion, the combustion sufficiency and uniformity are improved, and the combustion effect is improved. The baffle assembly 300 is located inside the inner casing 100, an auxiliary air flow channel 302 is formed between the baffle assembly 300 and the inner casing 100 at an interval, the baffle assembly 300 forms a main air flow channel 301, and the main air flow channel 301 is respectively communicated with the first injection channel 110 and the auxiliary air flow channel 302. Thus, the mixed gas of the primary air and the fuel gas enters the main gas flow channel 301 through the first injection channel 110 and is combusted to form a main flame; part of the mixed gas enters the auxiliary flow path 302 and is combusted to form an auxiliary flame. The secondary air channel of the embodiment of the application is arranged in the fire grate 1000, so that the interval between fire grates can be reduced, and the structure of the burner is more compact.

So far, the technical solutions of the present application have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present application is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the present application, and the technical scheme after the changes or substitutions will fall into the protection scope of the present application.

Claims

1. A fire grate, comprising: the inner shell, the baffle plate assembly and the outer shell are coated on the outer side of part of the inner shell;

a secondary air outlet passage is formed between the outer shell and part of the inner shell at intervals;

the inner shell is positioned on the outer side of the partition plate assembly, a first injection passage and a secondary air inlet branch passage are formed in the inner shell, and the secondary air inlet branch passage is communicated with the secondary air outlet branch passage to form a secondary air passage;

the baffle assembly forms a main air flow channel, an auxiliary air flow channel is formed between the baffle assembly and the inner shell at intervals, and the main air flow channel is communicated with the first injection channel and the auxiliary air flow channel respectively.

2. The fire grate of claim 1, wherein the baffle plate assembly comprises a plurality of baffle plates, the plurality of baffle plates are parallel, and the plurality of baffle plates are arranged in sequence along the thickness direction of the baffle plates; at least partial areas of two adjacent baffles are provided with intervals to form the main air flow channel;

two partition plates outside the partition plate assembly are defined as outer partition plates, partial areas of the outer partition plates are welded with the inner shells on two sides, and the auxiliary air flow channel is formed between the outer partition plates and the inner shells above the welding position; and a first through hole for communicating the auxiliary air flow channel and the main air flow channel is formed in the outer side clapboard above the welding position.

3. The fire grate of claim 2 wherein the top end of the screen is provided with a first weld, the first welds of all of the screens being welded to form the screen assembly; the first welding part divides the air outlet port of the main air flow channel into at least two main flame ports.

4. The fire grate of claim 3 wherein the baffle assembly has a mid-plane, the baffle assembly being symmetrical about the mid-plane; each of the bulkheads protrudes toward the mid-plane to form the first weld.

5. The fire grate of claim 3 wherein the bottom end of the outer baffle is provided with a second weld that is welded to the adjacent baffle inboard of the outer baffle, the second weld being opposite the first weld.

6. The fire grate of claim 5 wherein the bottom end of the outer baffle is positioned above the adjacent baffle inside the outer baffle, and the second weld extends downwardly to form a second connecting strip that extends to the bottom end of the adjacent baffle inside the outer baffle, the second connecting strip being welded to the adjacent baffle inside the outer baffle.

7. A fire grate as set forth in claim 2 wherein at least one of two adjacent partitions projects toward the spacing of the two partitions to form abutting support bosses.

8. The fire grate of any one of claims 1 to 7, wherein the outer shell comprises two second side plates respectively positioned at two sides of the inner shell and a second connecting strip connected to the top ends of the two second side plates, and a part of the second side plates and the inner shell are provided with a space to form the secondary air outlet channel;

and partial area of the second side plate protrudes away from the inner shell to form a mounting boss.

9. A burner, comprising: the fire grate comprises a combustion frame and the fire grate as claimed in any one of claims 1 to 8, wherein the combustion frame is provided with an air inlet, an air mixing hole and a secondary air hole, the air mixing hole is communicated with the first injection channel, the secondary air hole is communicated with the secondary air inlet branch, the opening directions of the air mixing hole and the secondary air hole are the same, and the opening direction of the air inlet is different from the opening direction of the air mixing hole.

10. A gas water heater, comprising: the combustor of claim 9, the water tank is installed on the top of combustor, the fan is installed in the bottom of combustor, just the air outlet of fan with the air intake intercommunication of combustor.