CN114396621B

CN114396621B - Fire grilles, burners and gas water heaters

Info

Publication number: CN114396621B
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: 2025-08-08
Anticipated expiration: 2041-12-22
Also published as: CN114396621A

Abstract

The present application belongs to the technical field of water heaters, and specifically relates to a fire grate, a burner and a gas water heater. The present application aims to solve the problem that the gap between two adjacent existing fire grates forms a secondary air channel and the secondary air uniformity is poor. The fire grate of the present application includes an inner shell, an outer shell and a partition assembly, wherein the outer shell is located on the outside of a portion of the inner shell, and there is a gap between the outer shell and the portion of the inner shell inside it to form a secondary air outlet channel; the inner shell forms a first ejection channel and a secondary air intake channel, and the secondary air intake channel and the secondary air outlet channel are connected to form a secondary air channel, providing secondary air for combustion, improving the sufficiency and uniformity of combustion, and improving the combustion effect. The partition assembly is located on the inner side of the inner shell, and there is a gap between the partition assembly and the inner shell to form an auxiliary air flow channel, and the partition assembly forms a main air flow channel, and the main air flow channel is respectively connected to the first ejection channel and the auxiliary air flow channel, and burns to form a main flame and an auxiliary flame respectively.

Description

Fire row, burner 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 takes gas as fuel, the mixed air and gas are combusted in a combustion chamber through a burner to generate high-temperature smoke, and the high-temperature smoke flows through a heat exchanger to exchange heat with cold water in the heat exchanger, so that the purpose of preparing hot water is achieved.

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

However, the gaps between two adjacent fire rows form secondary air channels, so that the two fire rows share air in one secondary air channel, the secondary air quantity is insufficient, and the secondary air uniformity is poor, so that uneven and insufficient combustion is caused, and the working efficiency is affected.

Disclosure of Invention

In order to solve the problems in the prior art, namely the problems that a secondary air channel is formed by gaps between two adjacent fire rows and the uniformity of secondary air is poor in the prior art, the application provides a fire row, a burner and a gas water heater.

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

In the alternative technical scheme of the fire grate, the partition plate assembly comprises a plurality of partition plates, the partition plates are parallel, the partition plates are sequentially arranged along the thickness direction of the partition plates, at least partial areas of two adjacent partition plates are provided with main air flow channels at intervals, two partition plates on the outer side of 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, auxiliary air flow channels are formed between parts of the outer partition plates above welding positions and the inner shells, and first through holes which are communicated with the auxiliary air flow channels and the main air flow channels are formed in the outer partition plates above the welding positions.

In the alternative technical scheme of the fire grate, a first welding part is arranged at the top end of the partition plate, the first welding parts of all the partition plates are welded to form the partition plate assembly, and the first welding part divides the air outlet port of the main air flow channel into at least two main flame ports.

In the alternative technical scheme of the fire grate, the partition plate assembly is provided with a middle plane, the partition plate assembly is symmetrical with respect to the middle plane, and each partition plate protrudes towards the middle plane to form the first welding part.

In the above-mentioned alternative technical scheme of fire row, the bottom of outside baffle is provided with second welded part, second welded part with the inboard adjacent baffle of outside baffle welds, second welded part with first welded part is relative.

In the above-mentioned alternative technical scheme of fire row, the bottom of outside baffle is located outside baffle inboard is adjacent the top of baffle, second welding portion downwardly extending forms the second connecting strip, the second connecting strip extends to outside baffle inboard is adjacent the bottom of baffle, the second connecting strip with outside baffle inboard is adjacent the baffle welding.

In the alternative technical scheme of the fire grate, at least one of the two adjacent clapboards protrudes towards the interval between the two clapboards to form an abutting supporting boss.

In the alternative 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, a part of secondary air outlet channels are formed between the second side plates and the inner shell at intervals, and part of areas of the second side plates deviate from the inner shell to form mounting bosses.

The burner comprises a combustion frame and the fire row, wherein the combustion frame is provided with an air inlet, a mixing hole and a secondary air hole, the mixing hole is communicated with the first injection channel, the secondary air hole is communicated with the secondary air inlet channel, the opening directions of the 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 mixing hole.

The gas water heater comprises a water tank, a fan and the burner, wherein the water tank is arranged at the top end of the burner, the fan is arranged at the bottom end of the burner, and an air outlet of the fan is communicated with an air inlet of the burner.

As can be appreciated by those skilled in the art, the fire grate, the burner and the gas water heater comprise an inner shell, an outer shell and a partition plate assembly, wherein the outer shell is positioned on the outer side of a part of the inner shell, a secondary air outlet channel 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 a first injection channel and a secondary air inlet channel, the secondary air inlet channel and the secondary air outlet channel are communicated to form a secondary air channel, secondary air is provided for combustion, the sufficiency and uniformity of combustion are improved, and the combustion effect is improved. The baffle assembly is located the inboard of inner shell, has the interval between baffle assembly and the inner shell to form the auxiliary air flow passageway, and the baffle assembly forms main air flow passageway, and main air flow passageway communicates with first injection passageway and auxiliary air flow passageway respectively. The mixed gas of primary air and fuel gas enters the main gas flow channel through the first injection channel to burn to form main flame, and part of the mixed gas enters the auxiliary gas flow channel to burn to form auxiliary flame. The secondary air channel provided by the embodiment of the application is arranged in the fire rows, so that the interval between the fire rows can be reduced, and the structure of the burner is more compact.

Drawings

Alternative embodiments of the fire grate, 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 view 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 cross-sectional view A-A of FIG. 2;

FIG. 4 is a schematic view of a fire grate separator assembly according to an embodiment of the present application;

FIG. 5 is an exploded view of a bulkhead assembly of a fire grate provided by an embodiment of the application;

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

FIG. 7 is a sectional view B-B in FIG. 6;

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

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

FIG. 10 is a schematic view of a burner provided in an embodiment of the present application;

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

In the drawing, 1000 parts of fire row, 100 parts of inner shell, 110 parts of first injection channel, 111 parts of first section, 112 parts of second section, 113 parts of third section, 114 parts of fourth section, 115 parts of fifth section, 120 parts of secondary air inlet channel, 121 parts of air passing plate, 1211 parts of second through hole, 130 parts of first side plate, 131 parts of first welding lug, 140 parts of clamping opening, 150 parts of first connecting part, 151 parts of abutting plane, 160 parts of welding area, 200 parts of outer shell, 201 parts of secondary air outlet channel, 210 parts of second side plate, 211 parts of first abutting lug, 212 parts of second abutting lug, 213 parts of blocking lug, 220 parts of mounting lug, 220 parts of second connecting strip, 300 parts of partition plate assembly, 301 parts of main air channel, 302 parts of auxiliary air channel, 310 parts of inner partition plate, 320 parts of outer partition plate, 321 parts of first through hole, 322 parts of second welding part, 330 parts of first welding part, 331 parts of main flame inlet, 341 parts of first supporting lug, 342 parts of second supporting lug, 412 parts of third supporting lug, 350 parts of first supporting lug, 412 parts of second supporting lug, 420 parts of second supporting lug, 212 parts of air inlet hole of second air regulating frame, 420, and 420 parts of air regulating hole of air regulating frame.

Detailed Description

First, it should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can adapt it as desired to suit a particular application.

Further, it should be noted that, in the description of the embodiments of the present application, terms such as directions or positional relationships indicated by the terms "inner", "outer", and the like are based on directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or the member must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present application.

In addition, it should be noted that, in the description of the embodiments of the present application, unless explicitly stated and limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and for example, they may be fixed, detachable, or integrally connected, or may be directly connected, or may be indirectly connected through an intermediate medium, or may be communication between two members. The specific meaning of the above terms in the embodiments of the present application can be understood by those skilled in the art according to the specific circumstances.

For partial premixed combustion, the gas is partially mixed with the required air in advance, the air is called primary air at the moment, then the mixed gas flows out from the fire hole, and after ignition, the partial gas is combusted by the primary air to form a flame core of flame, which is also called an inner cone. The rest of the fuel gas is mixed with combustion products, and is diffused, transferred and re-combusted with surrounding air, and the mixed air is called secondary air at the moment, and the formed flame is commonly called an outer cone. The flame structure formed by such combustion is often referred to as a raw flame, and a burner constructed using such combustion principles is referred to as an atmospheric burner.

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

In view of the above, the embodiment of the application provides a fire row, a burner and a gas water heater, wherein secondary air channels are integrated in the fire row, secondary air is provided for combustion, the sufficiency and uniformity of combustion are improved, the combustion effect is improved, gaps between adjacent fire rows can be reduced, and the structure of the burner is more compact.

The following describes a preferred technical scheme of the fire grate, the burner and the gas water heater according to the application with reference to the accompanying drawings.

Fig. 1 is a schematic view of a fire grate provided by an embodiment of the present application, fig. 2 is a front view of the fire grate provided by the embodiment of the present application, and fig. 3 is a sectional view A-A in fig. 2.

Referring to fig. 1 to 3, an embodiment of the present application provides a fire grate including an inner case 100, a partition assembly 300, and an outer case 200 covering the outside of a portion of the inner case 100.

Wherein outer shell 200 is located outside of a portion of inner shell 100, outer shell 200 is spaced from the portion of inner shell 100 inside thereof to form secondary air outlet channel 201, and outer shell 200 is connected, e.g., welded, to the other portion of inner shell 100 inside thereof. Two secondary air outlet branches 201 are provided, and the two secondary air outlet branches 201 are respectively located at two sides of the inner casing 100.

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

The partition plate assembly 300 is located at the inner side of the inner case 100, an auxiliary air flow channel 302 is formed between the partition plate assembly 300 and the inner case 100 at intervals, the partition plate 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. The mixed gas of primary air and fuel gas enters the main gas flow channel 301 through the first injection channel 110 to burn to form main flame, and part of the mixed gas enters the auxiliary gas flow channel 302 to burn to form auxiliary flame.

It can be understood that two auxiliary air flow channels 302 are respectively arranged at two sides of the main air flow channel 301 to gather the main flames, and two secondary air outlet channels 201 are respectively arranged at the outer sides of the auxiliary air flow channels 302 to provide secondary air for combustion, and can also avoid the divergence of the auxiliary flames to gather the flames.

FIG. 5 is an exploded view of a bulkhead assembly of a fire grate provided by an embodiment of the application, FIG. 6 is a front view of a bulkhead assembly of a fire grate provided by an embodiment of the application, and FIG. 7 is a cross-sectional view B-B in FIG. 6;

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

Referring to fig. 2,3 and 4, a baffle assembly 300 according to an embodiment of the present application includes a plurality of baffles, such as an inner baffle 310 and an outer baffle 320 in fig. 4. The multiple partitions are parallel, and are sequentially arranged along the thickness direction of the partitions, and at least partial areas of two adjacent partitions are provided with a main air flow channel 301 at intervals. Four partitions are provided in the drawing, and are arranged at intervals in the Y-axis direction, forming three main air flow passages 301. That is, when the baffle assembly 300 includes N baffles, the baffle assembly 300 forms n+1 main air flow channels 301, where N is an integer greater than 2. The embodiment of the application does not limit the number of the partition plates of the partition plate assembly.

Two baffles outboard of baffle assembly 300 are defined as outboard baffles 320 and adjacent baffles inboard of outboard baffles 320 are defined as inboard baffles 310. The embodiment of the present application is described with reference to the baffle assembly 300 including two outer baffles 320 and two inner baffles 310, but this is not a limitation on the number of baffles.

A partial region of the outer barrier 320 is welded to the inner case 100 on both sides, and a sub-air flow path 302 is formed between a portion of the outer barrier 320 above the welded position and the inner case 100. Referring to fig. 9, fig. 9 is a schematic structural view of an inner shell of a fire grate according to an embodiment of the present application, a first welding boss 131 is disposed on an outer shell 200, and an outer partition 320 is welded to the first welding boss 131. A partial region of the case 200 protrudes toward the separator assembly 300 to form a first welding boss 131, and the first welding boss 131 is in a long bar shape extending in the X-axis direction. The first welding boss 131 is welded to the outer diaphragm 320 to achieve a fixed connection of the diaphragm assembly 300 to the inner case 100, while the first welding boss 131 separates the first injection passage 110 from the auxiliary air flow passage 302.

The outer partition 320 above the welding position is provided with a first via 321 communicating the auxiliary air flow channel 302 and the main air flow channel 301. Thus, 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 burns at the gas outlet port of the auxiliary gas flow channel 302 to form auxiliary flame.

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

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

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

Each of the separators may be provided with one first welding portion 330, or each of the separators may be provided with a plurality of first welding portions 330, the plurality of first welding portions 330 being disposed at intervals along the length direction of the separator. Illustratively, four first welds 330 are provided on each separator plate, respectively, defined as ABCD from left to right. The first welding part A on each partition board is welded, the first welding part B on each partition board is welded, the first welding part C on each partition board is welded, and the first welding part D on each partition board is welded. The number of the first welding parts 330 is not limited in the embodiment of the present application.

Alternatively, the plurality of first welding parts 330 are uniformly spaced along the X-axis direction, so that the main flame ports 331 are formed to have the same size, and each flame burns uniformly. When M first welding parts 330 are provided on each partition plate, the outlet ports of the main gas flow channel 301 are 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 partitions are fixedly connected and the second ends of all the partitions are fixedly connected, e.g., welded, to facilitate the end-fixing connection with the inner casing 100.

Referring to fig. 4 and 6, when the plurality of main flame ports 331 are formed, the first through holes 321 are provided in various forms. For example, the first through holes 321 are elongated holes extending along the X-axis direction, and one first through hole 321 corresponds to one main flame port 331, so that the first through hole 321 is convenient to process. For example, each main flame port 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 mixed gas can be further uniformly passed through the first through holes 321, and the uniformity of combustion is further improved.

In some possible implementations, protruding bumps are provided on the separator, and the bumps are soldered to form the first soldered portion 330. The arrangement can realize welding and is beneficial to ensuring the interval between two adjacent partition boards.

In other possible implementations, and with reference to fig. 7 and 8, the baffle assembly 300 has a mid-plane O about which the baffle assembly 300 is symmetrical. Each of the separators protrudes toward the middle plane O to form a first welded portion 330, the outer separator 320 protrudes toward the middle plane O to form a first welded portion 330, and the inner separator 310 protrudes toward the middle plane O to form a first welded portion 330. It is understood that the inner separator 310 is spaced apart from the middle plane O by a small dimension and the outer separator 320 is spaced apart from the middle plane O by a large dimension. The arrangement is simple and convenient to process, and is beneficial to saving the cost.

In order to ensure the distance between two adjacent clapboards, the embodiment of the application protrudes towards the interval between the two clapboards on at least one of the two adjacent clapboards to form an abutting supporting boss.

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

Referring to fig. 5 and 8, a partial region of the inner partition 310 protrudes toward the middle plane O to form a second support boss 342, and the second support bosses 342 of the two inner partitions 310 abut against each other, ensuring a space between the two inner partitions 310. The second supporting boss 342 may be a circular boss, an oval boss, a long-strip-shaped boss, or the like, and the second supporting boss 342 may be one or more than one second supporting boss 342 may be disposed at intervals along the X-axis direction. Referring to fig. 5 and 6, the second support bosses 342 are elongated bosses extending in the Z direction, and the second support bosses 342 are provided in five, one second support boss 342 for each main flame port 331. The shape, number and arrangement of the second support bosses 342 are not limited in the embodiment of the present application.

Referring to fig. 5 and 8, a portion of the inner partition 310 protrudes toward the middle plane O to form a third support boss 343, and the third support bosses 343 of the two inner partitions 310 abut against each other to ensure a space between the two inner partitions 310. The third supporting boss 343 may be a circular boss, an oval boss, a long-strip-shaped boss, or the like, and the third supporting boss 343 may be one or more than one third supporting boss 343 may be disposed, and a plurality of third supporting bosses 343 are disposed at intervals along the X-axis direction. Referring to fig. 5 and 6, the third supporting boss 343 is a circular boss, and four third supporting bosses 343 are provided, one third supporting boss 343 corresponding to each of the first welding parts 330. The shape, number and arrangement of the third supporting protrusions 343 are not limited in the embodiment of the present application.

The partition board provided by the embodiment of the application is beneficial to ensuring the interval between two adjacent partition boards by arranging the supporting boss, can also play a role in strengthening the strength of the partition board, and can also play a role in blocking and homogenizing air flow.

Referring to fig. 4 to 6, the bottom end of the outer separator 320 according to the embodiment of the present application is provided with a second welding portion 322, and the second welding portion 322 is welded to the separator adjacent to the inside of the outer separator 320, that is, the second welding portion 322 is welded to the inner separator 310, thereby further improving the structural strength and stability of the separator 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 by one, so that the upper end and the lower end of the outer side partition 320 are stressed uniformly, and stability of the structure is ensured.

Optionally, a part of the area of the outer spacer 320 protrudes toward the inner spacer 310 to form a second welding part, so that the arrangement and the processing are simple and convenient, which is beneficial to saving the cost.

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

The embodiment of the present application is configured such that the bottom end openings of the baffle plate assembly 300 are not flush, thereby forming a barrier to the air flow, such that the air flow is divided there to enter the different main flame ports 331, respectively.

Referring to fig. 1 to 3, the outer case 200 includes two second side plates 210 respectively located at both sides of the inner case 100 and a second connection bar 220 connected to the top ends of the two second side plates 210, a part of the second side plates 210 and the inner case 100 are spaced apart to form a secondary air outlet channel 201, and the second connection bar 220 is respectively connected to the top ends of the second side plates 210 at both sides, so that the distance between the two second side plates 210 can be ensured, and the size of the outlet port of the secondary air outlet channel 201 is prevented from being affected. Optionally, a plurality of second connecting strips 220 are provided, and the plurality of second connecting strips 220 are uniformly spaced 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 region of the second side plate 210 protrudes away from the inner case 100 to form a mounting boss 214. When the fire bars are installed in the burner, the installation bosses 214 of the two adjacent fire bars are abutted, so that the convenience and accuracy of the installation of the fire bars are improved, and the interval between the two adjacent fire bars is ensured. Wherein, the installation boss 214 may be a circular boss, an elliptical boss, a polygonal boss, etc., one installation boss 214 may be provided, a plurality of installation bosses 214 may be provided, and a plurality of installation 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 abutment boss 211 and a second abutment boss 212, and the first abutment boss 211 abuts against the inner case 100 at the upper and lower ends of the first welding boss 131. The second abutment boss 212 is located below the first abutment boss 211, the second abutment boss 212 abutting the first side plate 130 forming the first injection passage 110.

The first abutment boss 211 may be an elongated boss extending in the Z-axis direction. The first abutment bosses 211 may be provided in plurality, and the plurality of first abutment bosses 211 are provided at intervals along the X-axis direction. Referring to fig. 1 and fig. 2, a blocking convex strip 213 is disposed between two adjacent first abutting bosses 211, and a space is formed between the blocking convex strip 213 and the inner casing 100, so that the blocking convex strip 213 in the embodiment of the present application plays a role in blocking the airflow, and prevents the airflow from being too large.

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

The second abutment boss 212 may be a semicircle, an ellipse, a polygon, etc., and the shape, the number and the arrangement of the second abutment boss 212 are not limited in the embodiment of the present application.

According to the embodiment of the application, the first abutting boss 211 and the second abutting boss 212 are arranged on the second side plate 210, so that the second side plate 210 and the inner shell 100 keep a space, namely the size of the secondary air outlet channel 201 is ensured, and the first abutting boss 211 and the second abutting boss 212 can also play a role in blocking air flow, so that uniformity of secondary air outlet is ensured.

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

Referring to fig. 1 to 3 and 9, the inner case 100 includes two opposite first side plates 130, partial regions of the two first side plates 130 are connected, and partial regions of the two first side plates 130 have a space forming the first injection passage 110 and the secondary air intake branch passage 120. The right and bottom ends of the two first side plates 130 are connected, e.g., welded, hemmed, etc. The left portions of the two first side plates 130 are connected in regions, and the partial regions form the air inlet port of the first injection passage 110 and the air inlet port of the secondary air intake manifold 120. The top ends of the two first side plates 130 have ports spaced to form flame burns.

Optionally, the air inlet port of the first injection channel 110 is flush with the air inlet port of the secondary air inlet channel 120, so that uniformity of air entering the first injection channel 110 and the secondary air inlet channel 120 can be improved, and convenience in connection between the fire grate and the combustion frame of the burner 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 case 100 is provided with a locking hole 140 for locking with the combustion frame, and the top end of the second side of the inner case 100 is locked with the combustion frame, so that the second side of the fire row is fixed on the combustion frame. The first side of the outer case 200 is fixedly connected with the first side of the inner case 100 to form a first connection part 150, the bottom surface of the first connection part 150 forms an abutment plane 151 abutting against the combustion frame, and the top end of the first connection part 150 is clamped against the combustion frame, so that the first side of the fire row is fixed on the combustion frame. Therefore, the fire grate is stably arranged on the combustion frame, and the installation mode is simple and reliable.

With continued reference to fig. 9, the end of the secondary air intake manifold 120 remote from the intake port thereof is recessed inwardly to form an air passing plate portion 121, and the air passing plate portion 121 is provided with a second through hole 1211. The left end of the secondary air inlet channel 120 is an inlet port thereof, and the side wall of the right end of the secondary air inlet channel 120 is recessed inwards to form an air passing plate part 121, and the air passing plate part 121 is arranged on two sides of the secondary air inlet channel 120. The gas passing plate portion 121 is a plate portion, and the second via 1211 is conveniently processed. The second via 1211 is used to communicate the secondary air inlet manifold 120 with the secondary air outlet manifold 201. One second via 1211 may be provided, and a plurality of, for example, two second vias 1211 may be provided. The shape of the second via 1211 may be arbitrary, for example, the second via 1211 is a waist-shaped hole. The shape, the number, and the arrangement of the second vias 1211 are not limited in the embodiment of the present application.

The second through hole 1211 is conveniently formed by arranging the air passing plate 121, and the cross-sectional area of the right end of the secondary air inlet channel 120 is smaller than that of the left end of the secondary air inlet channel 120 by the air passing plate 121, so that the flow rate of secondary air is improved, and the secondary air can enter the secondary air outlet channel 201 quickly. Wherein the cross section of the secondary air inlet channel 120 is a plane formed by YZ plane cutting.

Referring to fig. 3 and 9, the first injection passage 110 of the present embodiment includes a first section 111, a second section 112, a third section 113, a fourth section 114, and a fifth section 115 that are in communication. The left end of the first section 111 is an air inlet port of the first injection channel 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 tangential, so that the mixed gas flows more smoothly. The third section 113 communicates with the second section 112, the third section 113 is substantially triangular, and the cross-sectional area of the third section 113 gradually decreases from left to right. The first, second and third sections 111, 112, 113 are generally shaped as left-opening U-shaped channels. In addition, the secondary air inlet channel 120 is located in the U-shaped channel, and the first side plate 130 of the portion between the secondary air inlet channel 120 and the U-shaped channel is welded in a contact manner, so that the second side plate 210 and the first side plate 130 are welded conveniently, and the secondary air outlet channel 201 is formed conveniently.

The fourth section 114 communicates with the third section 113, and the fourth section 114 extends in the X-axis direction, so that the mixed gas can enter the main gas flow channel 301 in the X-axis direction. The fifth segment 115 communicates with the fourth segment 114, the fifth segment 115 extends in the X-axis direction, and the fifth segment 115 is located above the fourth segment 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 in the Y direction, is defined as a second interval, the distance between the two first side plates 130 on both sides of the third section 113, i.e., the dimension of the third section 113 in the Y direction, is defined as a third interval, the distance between the two first side plates 130 on both sides of the fourth section 114, i.e., the dimension of the fourth section 114 in the Y direction, is defined as a fourth interval, and 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 interval is smaller than the first interval, so that a welding area of the housing 200 is formed at the side wall of the second section 112, and the third interval is smaller than the second interval, so that an interval is formed between the first side plate 130 and the second side plate 210 forming the third section 113, thereby facilitating the formation of the secondary air outlet channel 201. The fourth interval is smaller than the third interval, so that the cross-sectional area of the fourth section 114 is smaller than the cross-sectional area of the third section 113, and thus the flow rate and pressure of the mixed gas flow therein are changed, so that the mixed gas becomes more uniform in the X direction after passing through the fourth section 114, and 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 baffle plate assembly 300 can be avoided, interference is avoided, a large amount of mixed gas can enter the main gas flow channel 301, and the smoothness of mixed gas circulation is improved.

The first side plate 130, which forms part of the secondary air inlet channel 120, part of the first injection channel 110 and the secondary air channel 302, is spaced from the housing 200 to form a secondary air outlet channel 201.

With specific reference to fig. 3 and 9, the second side plate 210 is welded to the first side plate 130 by the welding area 160. Where the welding region 160 includes six dashed elliptical regions in fig. 9, it should be understood that the dashed elliptical regions are merely approximate limits of the location and extent of the welding region 160 and are not to be construed as limiting the specific location and extent of the welding region 160 in accordance with embodiments of the present application. The area of the first connection 150 on the left side of the outer case 200 and the inner case 100, the first partial area of the left end of the secondary air inlet manifold 120, the second partial area between the first partial area and the area of the first connection 150, the third partial area of the lower part of the secondary air inlet manifold 120, the partial area of the second section 112, and the fourth partial area on the right side of the inner case 100 are welded so that the outer case 200 is fixedly connected with the inner case 100, and the bottom end of the outer case 200 is opened to form an outlet port of the secondary air outlet manifold 201 in cooperation with the top port of the inner case 100.

Thus, other partial areas of the U-shaped channel and partial areas of the third section 113 and beyond are spaced from the housing 200 to form secondary air outlet channels 201. The passages of the fourth segment 114 extend in the X-axis direction as the secondary air passes through the partial passages of the corresponding portion of the segment so that the secondary air can be uniformly distributed in the X-axis direction. And, the secondary air outlet channel 201 is changed in 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 in cross-sectional area, so that the flow rate and pressure of the secondary air are changed, and the secondary air becomes more uniform in the X-axis direction, which is beneficial to improving the uniformity of combustion.

The cross sections of the first injection passage 110 and the sections of the secondary air outlet passage 201 refer to the sections formed by YZ plane cutting.

Fig. 10 is a schematic structural view of a burner according to an embodiment of the present application, and fig. 11 is an exploded view of a burner according to an embodiment of the present application.

Referring to fig. 10 and 11, an embodiment of the present application provides a burner including a burner frame 410 and a fire row 1000, the fire row 1000 being mounted on the burner frame 410. Wherein, fire row 1000 is provided in plurality, and a plurality of fire rows 1000 are arranged at intervals along the Y-axis direction. Only one fire row 1000 is shown in fig. 1 and 2, and in fact, the number of fire rows 1000 is the same as the number of air mixing holes 411 provided on the combustion frame 410.

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

The combustion frame 410 can balance the mixed gas entering each fire row 1000 by arranging the mixed gas holes 411, and secondary air entering each fire row 1000 by arranging the secondary gas holes 412 can balance the 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 according to the embodiment of the present application further includes an air adjusting plate 430, wherein the air adjusting plate 430 is fixed on the combustion frame 410, and the air adjusting plate 430 is attached to a side plate of the combustion frame 410, where the air mixing holes 411 and the secondary air holes 412 are provided. The damper 430 is provided with a second damper hole 432 facing the air mixing hole 411, a third damper hole 433 facing the secondary air hole 412, and a first damper hole 431 located below the second damper hole 432. The first air adjusting hole 431, the second air adjusting hole 432 and the third air adjusting hole 433 are rectangular holes. Embodiments of the present application provide for uniformity of airflow between the fire bars 1000 by providing the damper 430.

The burner of the embodiment of the present application further includes a combustion chamber housing 420 located outside the burner frame 410 and the damper 430 for forming a combustion space. The combustion chamber shell 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 application, the opening directions of the air mixing 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 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 air of the air inlet 421 can be prevented from directly blowing to the air mixing hole 411 and the secondary air hole 412 to influence the uniformity of combustion.

As shown in fig. 10 and 11, the opening directions of the air mixing holes 411 and the secondary air holes 412 are the negative direction of the X axis, and the opening direction of the air intake 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 damper 430 and the combustion chamber housing 420 with a space therebetween, so that the air of the air inlet 421 enters the first cavity and enters the second cavity after preliminary uniform air flow through the first air-conditioning holes 431, and then part of the air enters the first injection passage 110 after uniform air flow again through the second air-conditioning holes 432, and part of the air enters the secondary air inlet branch passage 120 after uniform air flow again through the third air-conditioning holes 433.

In the embodiment of the application, the air is doubly regulated by arranging the first air regulating holes 431, the second air regulating holes 432 and the third air regulating holes 433 on the air regulating plate 430, so that the uniformity of the air entering each fire row 1000 is improved, and the uniformity of combustion is improved.

The embodiment of the application also provides a gas water heater which comprises a water tank, a fan and the burner in the embodiment, wherein the water tank is arranged at the top end of the burner, the fan is arranged at the bottom end of the burner, an air outlet of the fan is communicated with an air inlet of the burner, the fan provides air for the burner to burn, and high-temperature flue gas formed by burning a fire row of the burner exchanges heat with the water tank, so that water in the water tank is heated.

In summary, the fire row 1000 of the gas water heater according to the embodiment of the application includes the inner shell 100, the outer shell 200 and the partition plate assembly 300, wherein the outer shell 200 is located at the outer side of a part of the inner shell 100, the outer shell 200 and a part of the inner shell 100 at the inner side thereof are provided with the secondary air outlet channel 201 at intervals, the inner shell 100 forms the first injection channel 110 and the secondary air inlet channel 120, and the secondary air inlet channel 120 and the secondary air outlet channel 201 are communicated to form the secondary air channel, so that secondary air is provided for combustion, the sufficiency and uniformity of combustion are improved, and the combustion effect is improved. The partition plate assembly 300 is located at the inner side of the inner case 100, an auxiliary air flow channel 302 is formed between the partition plate assembly 300 and the inner case 100 at intervals, the partition plate 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. The mixed gas of primary air and fuel gas enters the main gas flow channel 301 through the first injection channel 110 to burn to form main flame, and part of the mixed gas enters the auxiliary gas flow channel 302 to burn to form auxiliary flame. The secondary air channel of the embodiment of the application is arranged in the fire rows 1000, so that the interval between the fire rows can be reduced, and the structure of the burner is more compact.

Thus far, the technical solution of the present application has 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 protection of the present application is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present application, and such modifications and substitutions will fall within the scope of the present application.

Claims

1. A fire bar, comprising: an inner shell, a baffle assembly, and an outer shell covering a portion of the outer side of the inner shell;

A gap is formed between the outer shell and a portion of the inner shell to form a secondary air outlet passage;

The inner shell is located outside the partition assembly, and the inner shell forms a first ejection channel and a secondary air intake branch channel. The secondary air intake branch channel and the secondary air outlet branch channel are connected to form a secondary air channel.

The baffle assembly forms a primary airflow channel, and a gap is formed between the baffle assembly and the inner shell to form a secondary airflow channel, wherein the primary airflow channel is in communication with the first ejection channel and the secondary airflow channel, respectively; wherein an air outlet port of the primary airflow channel is flush with an air outlet port of the secondary airflow channel;

The partition assembly includes a plurality of partitions, wherein the two partitions on the outer side of the partition assembly are defined as outer partitions, the partition assembly has a middle plane, and the partition assembly is symmetrical about the middle plane; each of the partitions protrudes toward the middle plane to form a first welding portion;

At least one of the two adjacent partitions protrudes toward the gap between the two partitions to form a supporting boss that abuts against each other; the bottom end of the outer partition is higher than the bottom end of the inner partition.

2. The fire bar according to claim 1, wherein the plurality of partitions are parallel and arranged sequentially along the thickness direction of the partitions; at least a portion of the area of two adjacent partitions is spaced apart to form the main airflow channel;

Part of the outer partition is welded to the inner shells on both sides, and the auxiliary airflow channel is formed between the outer partition and the inner shell above the welding position; the outer partition above the welding position is provided with a first through hole connecting the auxiliary airflow channel and the main airflow channel.

3. The fire bar according to claim 2 is characterized in that a first welding portion is provided at the top end of the partition, and the first welding portions of all the partitions are welded to form the partition assembly; the first welding portion separates the air outlet port of the main air flow channel into at least two main flame ports.

4. The fire bar according to claim 3, characterized in that a second welding portion is provided at the bottom end of the outer partition, the second welding portion is welded to the partition adjacent to the inner side of the outer partition, and the second welding portion is opposite to the first welding portion.

5. The fire bar according to claim 4 is characterized in that the bottom end of the outer partition is located above the partition adjacent to the inner side of the outer partition, the second welding portion extends downward to form a second connecting strip, the second connecting strip extends to the bottom end of the partition adjacent to the inner side of the outer partition, and the second connecting strip is welded to the partition adjacent to the inner side of the outer partition.

6. The fire bar according to any one of claims 1 to 5, wherein the outer shell comprises two second side panels located on both sides of the inner shell, and a second connecting strip connected to the top ends of the two second side panels, and a gap is formed between part of the second side panels and the inner shell to form the secondary air outlet channel;

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

7. A burner, characterized in that it comprises: a combustion rack and the fire bar according to any one of claims 1 to 6, the combustion rack being provided with an air inlet, an air mixing hole and a secondary air hole, the air mixing hole being connected to the first ejection channel, the secondary air hole being connected to the secondary air intake branch channel, the opening directions of the air mixing hole and the secondary air hole being the same, and the opening direction of the air inlet being different from the opening direction of the air mixing hole.

8. A gas water heater, characterized in that it comprises: a water tank, a fan and the burner according to claim 7, wherein the water tank is installed at the top end of the burner, the fan is installed at the bottom end of the burner, and the air outlet of the fan is connected to the air inlet of the burner.