CN114396620A

CN114396620A - Combustor and gas water heater

Info

Publication number: CN114396620A
Application number: CN202111583304.1A
Authority: CN
Inventors: 孙运磊; 杜寒; 郑涛; 刘云
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
Anticipated expiration: 2041-12-22
Also published as: CN114396620B

Abstract

The application belongs to the technical field of water heaters, and in particular relates to a burner and a gas water heater. The present application aims to solve the problem of insufficient combustion of the fire exhaust of the existing burner. The burner of the gas-fired water heater of the present application includes a fire row and a combustion frame, the fire row includes a first casing, a second casing and a third casing, and the first casing is provided with an air mixing channel and a secondary air intake channel; A secondary air outlet channel is formed between the second housing and the first housing, and the secondary air outlet channel is connected with the secondary air intake channel to form a secondary air channel; the third housing and the first housing are connected An auxiliary airflow channel is formed between them, a main airflow channel is formed in the third shell, and the main airflow channel is respectively connected with the auxiliary airflow channel and the air mixture channel; The secondary air holes are connected with the secondary air intake in separate passages to provide secondary air for combustion, improve the sufficiency of combustion, and then improve the combustion effect.

Description

Combustor and gas water heater

Technical Field

The application belongs to the technical field of water heaters, and particularly relates to a combustor 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 fire row of the burner is provided with an injection passage, and after air and fuel gas are mixed in the injection passage, the air and the fuel gas are sprayed out from a flame hole to combust to form flame.

However, the air amount is insufficient and the mixture is not uniform, so that the combustion is often insufficient, and a large amount of gases such as CO and NOx, which are harmful to the human body, are generated, and the heating efficiency is affected.

Disclosure of Invention

In order to solve the above-mentioned problem among the prior art, arrange the burning inadequately promptly for solving the fire of current combustor, influence the problem of heating efficiency, this application provides a combustor and gas heater.

The burner includes: burning frame and fire are arranged, the fire is arranged and is included: a first housing, a second housing, and a third housing; a gas mixing channel and a secondary air inlet branch channel are arranged in the first shell, and the secondary air inlet branch channel and part of the gas mixing channel are positioned on the inner side of the second shell; the second shell is positioned on the outer side of part of the first shell, a secondary air outlet branch channel is formed between the second shell and the first shell, and the secondary air outlet branch channel is communicated with the secondary air inlet branch channel to form a secondary air channel; the third shell is positioned in the first shell, an auxiliary air flow channel is formed between the third shell and the first shell, a main air flow channel is formed in the third shell, and the main air flow channel is respectively communicated with the auxiliary air flow channel and the air mixing channel; the combustion frame is provided with a gas mixing hole and a secondary air hole, the gas mixing hole is communicated with the gas mixing channel, and the secondary air hole is communicated with the secondary air inlet channel.

In an optional technical solution of the above burner, the third casing includes a top flat plate and two third side plates disposed at intervals on a bottom surface of the top flat plate, the top flat plate is provided with primary flame holes, and a space between the top flat plate and the two third side plates forms the primary air flow channel; the bottom openings of the two third side plates are communicated with the gas mixing channel, and first through holes communicated with the main gas flow channel and the auxiliary gas flow channel are formed in the third side plates.

In an optional technical scheme of the burner, a plurality of main flame holes are formed in the top flat plate, and the main flame holes are uniformly arranged at intervals along the length direction of the top flat plate to form a combustion unit; a plurality of the combustion units are arranged at intervals along the length direction of the top flat plate; each combustion unit corresponds to one first through hole, or each main flame hole of each combustion unit corresponds to one first through hole.

In an optional technical solution of the above burner, the two third side plates respectively protrude toward the inside of the main gas flow channel to form reinforcing bosses respectively; the bottom ends of the two third side plates respectively protrude towards the inside of the main air flow channel to form connecting bosses respectively, and a first connecting strip is connected between the two connecting bosses.

In an optional technical solution of the above burner, the first casing includes two opposite first side plates, and partial regions of the two first side plates are connected, and the partial regions of the two first side plates have a gap to form the air mixing channel and the secondary air intake branch; partial areas of the two first side plates protrude towards the third side plate to form a first welding boss, the first welding boss is long-strip-shaped and extends along the length direction of the top flat plate, and the first welding boss is welded with the third side plate; the auxiliary air flow channel is formed between the first side plate and the third side plate above the first welding boss, and the first through hole is formed in the third side plate above the first welding boss.

In an optional technical solution of the above burner, the second casing includes two second side plates opposite to each other and a second connecting strip connected to top ends of the two second side plates, and a part of the second side plates and the first side plate have a gap therebetween to form the secondary air outlet branch passage; part of the area of the second side plate protrudes towards the first side plate to form a first abutting boss and a second abutting boss, and the first abutting boss abuts against the first side plate at the upper end and the lower end of the first welding boss; the second abutting lug boss is located below the first abutting lug boss, and the second abutting lug boss is abutted to the first side plate forming the air mixing channel.

In an optional technical scheme of the burner, an air inlet port of the secondary air inlet branch is flush with an air inlet port of the air mixing channel; the secondary air inlet sub-channel is far away from the side wall of one end of the air inlet port of the secondary air inlet sub-channel and is inwards sunken to form an air passing plate portion, a second through hole is formed in the air passing plate portion and communicated with the secondary air outlet sub-channel and the secondary air inlet sub-channel.

In an optional technical scheme of the burner, the first shell is provided with a first side and a second side which are opposite, and the second side of the first shell is provided with a clamping opening clamped with the burner rack; the first side of the second shell is fixedly connected with the first side of the first shell to form a first connecting part, and the bottom surface of the first connecting part forms an abutting plane abutted to the combustion rack.

In an optional technical solution of the above burner, an air outlet port of the main air flow channel is flush with an air outlet port of the auxiliary air flow channel; the end face of the top end of the second shell protrudes out of the air outlet port of the main air flow channel.

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.

The combustor comprises a fire grate and a combustion frame, the fire grate comprises a first shell, a second shell and a third shell, a gas mixing channel and a secondary air inlet branch channel are arranged in the first shell, the second shell is positioned on the outer side of part of the first shell, a secondary air outlet branch channel is formed between the second shell and the first shell, and the secondary air outlet branch channel is communicated with the secondary air inlet branch channel to form a secondary air channel; the third shell is positioned in the first shell, an auxiliary air flow channel is formed between the third shell and the first shell, a main air flow channel is formed in the third shell, and the main air flow channel is respectively communicated with the auxiliary air flow channel and the air mixing channel; the combustion frame is provided with a gas mixing hole and a secondary air hole, the gas mixing hole is communicated with the gas mixing channel, and the secondary air hole is communicated with the secondary air inlet channel.

Thus, the mixed gas enters the mixed gas channel of the fire grate through the mixed gas hole of the combustion rack, part of the mixed gas in the mixed gas channel flows out of the main gas flow channel to be combusted to form main flames, and the other part of the mixed gas in the mixed gas channel flows out of the auxiliary gas flow channel to be combusted to form auxiliary flames; the secondary air enters the secondary air channel through the secondary air holes of the combustion frame and is discharged, so that the secondary air is provided for the combustion of the main flame and the auxiliary flame, the combustion sufficiency is improved, and the combustion effect is further improved. And the secondary air is positioned at the outer side of the auxiliary flame, and can also achieve the effect of gathering the flame.

Drawings

Preferred embodiments of the burner and the 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 combustor provided by an embodiment of the present application;

FIG. 2 is an exploded view of a burner provided in an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a fire grate provided in an embodiment of the present application;

FIG. 4 is an exploded view of a fire bank provided in an embodiment of the present application;

FIG. 5 is a front view of a fire grate provided by an embodiment of the present application;

FIG. 6 is a sectional view A-A of FIG. 5;

FIG. 7 is a cross-sectional view B-B of FIG. 5;

FIG. 8 is a schematic structural diagram of a first housing of a fire grate provided in an embodiment of the present application;

fig. 9 is a schematic structural diagram of a third shell of the fire grate provided in the embodiment of the present application.

In the drawings:

1000: fire grate; 100: a first housing; 110: a gas mixing channel; 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 second 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; 220: a second connecting strip; 300: a third housing; 301: a main gas flow path; 302: an auxiliary airflow channel; 310: a third side plate; 311: a first via hole; 312: reinforcing the boss; 313: connecting the bosses; 320: a top plate; 321: a main flame hole; 322: a combustion unit; 330: a first connecting bar; 331: an extension portion; 332: a horizontal portion; 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.

In the related art, the fire row of the burner is provided with an injection passage, and after air and fuel gas are mixed in the injection passage, the air and the fuel gas are sprayed out from a flame hole to combust to form flame. However, the air amount is insufficient and the mixture is not uniform, so that the combustion is often insufficient, and a large amount of gases such as CO and NOx, which are harmful to the human body, are generated, and the heating efficiency is affected.

In view of this, the embodiment of the present application provides a middle burner, in which a gas mixing channel and a secondary air channel are integrated in a fire grate, a gas mixing hole and a secondary air hole are simultaneously disposed on a combustion frame, and the gas mixing hole is communicated with the gas mixing channel to provide primary air and fuel gas; the secondary air hole is communicated with the secondary air channel, secondary air is provided for combustion, the combustion sufficiency is improved, and the combustion effect is favorably improved.

The preferred technical scheme of the combustor and the gas water heater of the application is explained in the following by combining the attached drawings.

FIG. 1 is a schematic structural diagram of a combustor provided by an embodiment of the present application; fig. 2 is an exploded view of a burner provided in an embodiment of the present application.

Referring to fig. 1 and 2, an embodiment of the present application provides a burner, including: 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.

FIG. 3 is a schematic structural diagram of a fire grate provided in an embodiment of the present application; FIG. 4 is an exploded view of a fire bank provided in an embodiment of the present application; FIG. 5 is a front view of a fire grate provided by an embodiment of the present application; FIG. 6 is a sectional view A-A of FIG. 5; FIG. 7 is a cross-sectional view B-B of FIG. 5;

FIG. 8 is a schematic structural diagram of a first housing of a fire grate provided in an embodiment of the present application; fig. 9 is a schematic structural diagram of a third shell of the fire grate provided in the embodiment of the present application.

With reference to fig. 3 to 7, the fire grate 1000 according to the embodiment of the present application includes: a first casing 100, a second casing 200, and a third casing 300.

The first casing 100 is provided with a gas mixing channel 110 and a secondary air intake branch 120, and the secondary air intake branch 120 and a part of the gas mixing channel 110 are located inside the second casing 200, that is, a part of the first casing 100 is located inside the second casing 200. In the present embodiment, the first casing 100 of the upper half is located inside the second casing 200.

The second casing 200 is located outside a part of the first casing 100, a secondary air outlet channel 201 is formed between the second casing 200 and the first casing 100, a part of the second casing 200 is connected with the first casing 100, and a gap is formed between a part of the second casing 200 and the first casing 100 to form the secondary air outlet channel 201. The secondary air outlet branch passage 201 is communicated with the secondary air inlet branch passage 120 to form a secondary air passage, so as to provide secondary air for combustion.

The third casing 300 is located in the first casing 100, an auxiliary air flow channel 302 is formed between the third casing 300 and the first casing 100, a main air flow channel 301 is formed in the third casing 300, the main air flow channel 301 is respectively communicated with the auxiliary air flow channel 302 and the gas mixing channel 110, so that the mixed gas of the primary air and the gas enters the main air flow channel 301 through the gas mixing 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.

Referring to fig. 1 and 2 again, 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 gas mixing channel 110 to input the mixed gas into the gas mixing channel 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. 1 and 2, 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 air mixing channel 110 after passing through the second air adjusting hole 432 to be uniformly airflow again, and part of the air enters the secondary air inlet branch channel 120 after passing through the third air adjusting hole 433 to be uniformly airflow 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.

Referring to fig. 9, the third housing 300 of the embodiment of the present application includes a top plate 320 and two third side plates 310 spaced apart from each other and disposed on a bottom surface of the top plate 320. The top plate 320 is provided with main flame holes 321, and the space between the top plate 320 and the two third side plates 310 forms the main air flow path 301. The left end and the right end of the two third side plates 310 are fixedly connected and closed, and the bottom end openings of the two third side plates 310 are communicated with the gas mixing channel 110, so that the mixed gas in the gas mixing channel 110 enters the main gas flow channel 301, and part of the mixed gas in the main gas flow channel 301 is discharged and combusted in the main flame holes 321 to form main flames.

The third side plate 310 is provided with a first through hole 311 communicating the main airflow channel 301 and the auxiliary airflow channel 302, so that the other part of the mixed gas in the main airflow channel 301 enters the auxiliary airflow channel 302 through the first through hole 311, and the mixed gas in the auxiliary airflow channel 302 is combusted at the air outlet of the auxiliary airflow channel 302 to form an auxiliary flame.

Referring to fig. 6 and 7, the outlet ports of the main gas flow channels 301, i.e., the ports of the main flame holes 321, are flush with the outlet ports of the auxiliary gas flow channels 302, so that the main flame and the auxiliary flame are combusted on the same plane, thereby improving the combustion effect.

With continued reference to fig. 9, the top plate 320 is an elongated plate extending in the X-direction to form a plurality of combustion units 322 to increase the combustion area. Specifically, the top plate 320 is provided with a plurality of main flame holes 321, and the plurality of main flame holes 321 are arranged at intervals along the length direction of the top plate 320 to form one combustion unit 322. A plurality of combustion units 322 are provided at intervals along the length direction of the top plate 320, and each combustion unit 322 may include three, five main flame holes 321, and the like. The number of the combustion units 322 and the number of the main flame holes 321 of each combustion unit 322 are not limited in the embodiment of the present application.

The intervals between two adjacent main flame holes 321 in the same combustion unit 322 are the same, and the intervals between two adjacent combustion units 322 are the same, so that the uniformity of the flame can be improved. The interval between two adjacent combustion units 322 is greater than the interval between two adjacent main flame holes 321 in the same combustion unit 322, so that the combustion units 322 are formed, flames can be combusted in a concentrated manner in a subarea mode, a plurality of flames are formed, and the combustion stability is improved. The main flame holes 3211 may be circular holes, elliptical holes, kidney-shaped holes, or the like, and optionally, the main flame holes 321 are elongated holes extending in the Y-axis direction.

In some embodiments, each combustion unit 322 corresponds to one first via 311, referring to fig. 9, in this case, the first via 311 is a long-strip-shaped hole extending along the X direction, the first vias 311 are uniformly spaced along the X axis direction, and the number of the first vias 311 is the same as that of the combustion units 322. So set up and facilitate first via 311 processing.

In other embodiments, each of the main flame holes 321 of each of the combustion units 322 corresponds to one of the first through holes 311, and the first through holes 311 may be circular holes, elliptical holes, polygonal holes, or the like. The number of the first via holes 311 is the same as that of the main flame holes 321, and the first via holes 311 correspond to the main flame holes 321 one to one. The arrangement enables the mixed gas to be further uniform when passing through the first through holes 311, further improving the uniformity of combustion.

According to the embodiment of the application, each combustion unit 322 corresponds to one first through hole 311, or each main flame hole 321 of each combustion unit 322 corresponds to one first through hole 311, so that the mixed gas between each combustion unit 322 is uniform, and the uniformity of combustion between each combustion unit 322 is improved.

The two third side plates 310 protrude into the main airflow channel 312 to form reinforcing bosses 312, and the reinforcing bosses 312 may be in the shape of a long strip, a circle, an ellipse, or the like, which is not limited herein. For example, the reinforcing bosses 312 are circular bosses. The reinforcing bosses 312 may be provided in plurality, spaced apart on the third side plate 310. Illustratively, two reinforcing bosses 312 are provided on each third side plate 310. The number and arrangement of the reinforcing bosses 312 are not limited in the embodiment of the present application. According to the embodiment of the application, the reinforcing bosses 312 are arranged on the third side plate 310, so that the structural strength of the third side plate 310 is improved, the deformation of the third side plate 310 is avoided, and the cross sections of the main airflow channel 301 and the auxiliary airflow channel 302 are prevented, so that the combustion uniformity is influenced.

The bottom ends of the two third side plates 310 protrude towards the inside of the main airflow channel 301 respectively to form connecting bosses 313, and the first connecting strips 330 are connected between the two connecting bosses 313, so that the interval between the bottom ends of the two third side plates 310 can be ensured, the size of the air inlet of the main airflow channel 301 is further ensured, and the influence on the uniformity of the mixed gas caused by the deformation of the air inlet of the main airflow channel 301 is avoided. And the coupling boss 313 may also serve to reinforce the third side plate 310. The embodiment of the present application provides an installation space for the first connecting bar 330 by providing the connecting boss 313 and the surface of the third side plate 310 facing the first casing 100 as a concave pit, so that the first connecting bar 330 can be prevented from protruding.

The first connecting bar 330 may be a straight bar parallel to the top plate 320, and is connected to the connecting bosses 313 of the two third side plates 310. Alternatively, the first connecting bar 330 includes an extending portion 331 and a horizontal portion 332, the extending portion 33 is perpendicular to the horizontal portion 332, and two extending portions 331 are disposed at two ends of the horizontal portion 332. The extension 331 may be welded with the connection boss 313. The horizontal portion 332 is parallel to the top plate 320 for ensuring a distance between the two third side plates 310. The first connecting strip 330 is provided in this way for easy installation.

With reference to fig. 4, 6, 7 and 8, the first 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 the air mixing passage 110 and the secondary air intake branch passage 120 formed at intervals. The right and bottom ends of the two first side plates 130 are connected, for example, welded, hemmed, etc. The left side partial regions of the two first side plates 130 are connected, and the partial regions form the intake port of the air mixing passage 110 and the intake port of the secondary air intake 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 air mixing channel 110 is flush with the air inlet port of the secondary air inlet branch passage 120, so that uniformity of air entering the air mixing channel 110 and the secondary air inlet branch passage 120 can be improved, and convenience of connection between the fire grate 1000 and the air mixing holes 411 and the secondary air holes 412 in the combustion frame 410 is improved.

The first casing 100 has opposite first and second sides, i.e., left and right sides of the direction shown in fig. 8. Referring to fig. 1 and 2, the second side of the first casing 100 is provided with a fastening opening 140 for fastening to the burner rack 410, and the top end of the second side of the first casing 100 is fastened to the burner rack 410, so that the second side of the fire grate 1000 is fixed to the burner rack 410.

Referring to fig. 3, the first side of the second housing 200 is fixedly coupled to the first side of the first housing 100 to form a first coupling portion 150, a bottom surface of the first coupling portion 150 forms an abutment plane 151 abutting against the burner block 410, and a top end of the first coupling portion 150 is engaged with the burner block 410, such that the first side of the fire grate 1000 is fixed to the burner block 410.

Therefore, the fire grate 1000 is stably installed on the combustion frame 410, and the installation mode is simple and reliable.

Referring to fig. 6 and 7, partial areas of the two first side plates 130 protrude toward the third side plate 310 to form a first welding boss 131, the first welding boss 131 is a long strip extending along the length direction of the top plate 320, and the first welding boss 131 is welded to the third side plate 310, so that the third housing 300 is fixedly connected to the first housing 100.

An auxiliary air flow channel 302 is formed between the first side plate 130 and the third side plate 310 above the first welding boss 131 at an interval, and a first through hole 311 is formed in the third side plate 310 above the first welding boss 131, that is, the first through hole 311 is located above the first welding boss 131.

With continued reference to fig. 6 and 8, the end of the secondary air intake branch 120 away from the intake port thereof 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. 5 to 8, the air mixing channel 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 air mixing 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 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. And, 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 shell 200 and the first side plate 130 are conveniently welded, 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 interval is smaller than the first interval, so that a welding area of the second housing 200 is formed on the sidewall of the second section 112; the third interval is smaller than the second interval, so that the first side plate 130 forming the third section 113 is spaced from the second casing 200, 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 third shell 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 air mixing channel 110 and the auxiliary air channel 302 has a gap with the second casing 200 to form the secondary air outlet branch passage 201.

With specific reference to fig. 6 to 8, the second housing 200 is welded to the first side plate 130 through the welding area 160. Where the welding region 160 includes six dashed oval regions in fig. 8, 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 second housing 200 to the first housing 100 in the region of the first connection 150 on the left side of the first housing 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 150, the third partial region at the lower part of the secondary air intake branch passage 120, the partial region of the second segment 112, and the fourth partial region on the right side of the first housing 100, such that the second housing 200 is fixedly connected to the first housing 100; the bottom end of the second casing 200 is opened to match the top port of the first casing 100, forming an outlet port of the secondary air outlet channel 201.

Therefore, the secondary air outlet channel 201 is formed between the other partial area of the U-shaped channel, the third section 113 and the partial area above the third section, and the second shell 200 at intervals. As the secondary air passes through the corresponding portion of the fourth segment 114, the segment's passage extends in the X-axis direction so that the secondary air can be distributed to each of the combustion units 322 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 air mixing channel 110 and the sections of the secondary air outlet channel 201 refer to the sections cut by the YZ plane.

Referring to fig. 3 and 4, the second casing 200 of the embodiment of the present application includes two opposite second side plates 210 and second connecting strips 220 connected to top ends of the two second side plates 210, and the second connecting strips 220 are respectively connected to top ends of the second side plates 210 on two sides, 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 not affected. 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.

With reference to fig. 5 to 7, a partial region of the second side plate 210 protrudes toward the first housing 100 to form a first abutting boss 211 and a second abutting boss 212, the first abutting boss 211 abuts against the first side plate 130 at the upper end and the lower end of the first welding boss 131, that is, the first abutting boss 211 abuts against the outside of the fifth section 115 of the air mixing channel 110, and the first abutting boss 211 abuts against the first side plate 130 at the upper part of the first welding boss 131. The second abutting boss 212 is located below the first abutting boss 211, the second abutting boss 212 abuts against the first side plate 130 forming the air mixing channel 110, and specifically, the second abutting boss 212 abuts against the third section 113 of the air mixing channel 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. With reference to fig. 3 to 5, wherein a blocking protruding strip 213 is disposed between two adjacent first abutting bosses 211, and an interval is provided between the blocking protruding strip 213 and the first side plate 130, in the embodiment of the present application, the blocking protruding strip 213 is disposed to block the airflow, so as to avoid the airflow from being too large. 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 curb plate 210 and first curb plate 130 keep the interval through setting up first butt boss 211 and second butt boss 212 on second curb plate 210, guarantees the size of secondary air minute vent 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 was given vent to anger.

Optionally, the end surface of the top end of the second side plate 210 of the second 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.

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.

To sum up, the gas heater that this application embodiment provided, its combustor includes burning frame 410 and fire row 1000, and fire row 1000 includes: a first casing 100, a second casing 200, and a third casing 300; the first casing 100 is internally provided with a gas mixing channel 110 and a secondary air inlet branch channel 120, the second casing 200 is positioned at the outer side of part of the first casing 100, a secondary air outlet branch channel 201 is formed between the second casing 200 and the first casing 100, and the secondary air outlet branch channel 201 is communicated with the secondary air inlet branch channel 120 to form a secondary air channel for providing secondary air for combustion. The third casing 300 is located in the first casing 100, an auxiliary air flow channel 302 is formed between the third casing 300 and the first casing 100, and a main air flow channel 301 is formed in the third casing 300.

The combustion frame 410 is provided with a gas mixing hole 411 and a secondary air hole 412, the gas mixing hole 411 is communicated with the gas mixing channel 110, mixed gas of primary air and fuel gas enters the gas mixing channel 110 through the gas mixing hole 411, and part of the mixed gas enters the main gas flow channel 301 to be combusted to form main flame; part of the mixed gas enters the auxiliary flow path 302 and is combusted to form an auxiliary flame. The secondary air hole 412 is communicated with the secondary air inlet branch passage 120 to input secondary air into the secondary air outlet branch passage 201, so that secondary air is provided for combustion, and the combustion sufficiency is improved.

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. In addition, the air mixing holes 411 and the secondary air holes 412 are arranged on the combustion frame 410, so that the uniformity of air flow among different fire rows 1000 is improved, and the combustion effect is improved.

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 burner, comprising: a combustion rack and a fire row, the fire row comprising: a first casing, a second casing and a third casing;

The first housing is provided with an air-mixing passage and a secondary air intake passage, and the secondary air intake passage and part of the air-mixing passage are located inside the second housing;

The second casing is located on the outer side of part of the first casing, and a secondary air outlet channel is formed between the second casing and the first casing, and the secondary air outlet channel is connected to the second casing. The secondary air intake passages are connected to form secondary air passages;

The third casing is located in the first casing, an auxiliary airflow channel is formed between the third casing and the first casing, a main airflow channel is formed in the third casing, and the main airflow The passages are respectively communicated with the auxiliary airflow passage and the air mixing passage;

The combustion frame is provided with an air-mixing hole and a secondary air hole, the air-mixing hole is communicated with the air-mixing passage, and the secondary air hole is communicated with the secondary air intake passage.

2 . The burner according to claim 1 , wherein the third casing comprises a top plate and two third side plates arranged at intervals on the bottom surface of the top plate, and the top plate is provided with a main flame. 3 . The space between the top flat plate and the two third side plates forms the main airflow channel; the bottom end openings of the two third side plates are communicated with the air mixing channel, and the third side plates The side plate is provided with a first through hole that communicates with the main airflow channel and the auxiliary airflow channel.

3 . The burner according to claim 2 , wherein a plurality of the main flame holes are provided on the top plate, and the plurality of main flame holes are evenly spaced along the length direction of the top plate. 4 . , forming a combustion unit; a plurality of the combustion units are arranged at intervals along the length direction of the top plate;

Each of the combustion units corresponds to one of the first through holes, or, each of the main flame holes of each of the combustion units corresponds to one of the first through holes.

4 . The burner according to claim 2 , wherein the two third side plates respectively protrude toward the main airflow channel to form reinforcing bosses respectively; 5 .

The bottom ends of the two third side plates respectively protrude toward the main airflow channel, respectively forming connecting bosses, and a first connecting bar is connected between the two connecting bosses.

5 . The burner according to claim 2 , wherein the first casing comprises two opposite first side plates, parts of the two first side plates are connected, and two of the first side plates are connected. 6 . Part of the area of one side plate is spaced to form the air mixing channel and the secondary air intake channel;

Part regions of the two first side plates protrude toward the third side plate to form first welding bosses, and the first welding bosses are elongated strips extending along the length direction of the top flat plate. the first welding boss is welded with the third side plate;

The auxiliary airflow channel is formed between the first side plate and the third side plate above the first welding boss, and the third side plate above the first welding boss is provided with a Describe the first via.

6. The burner according to claim 5, wherein the second casing comprises two opposite second side plates and a second connecting bar connected to the top ends of the two second side plates, part of which is There is a space between the second side plate and the first side plate to form the secondary air outlet channel;

A partial area of the second side plate protrudes toward the first side plate to form a first abutting boss and a second abutting boss, and the first abutting boss and the first welding boss are The first side plates at the upper and lower ends are abutted; the second abutting boss is located below the first abutting boss, and the second abutting boss is connected to the The first side plate abuts.

7. The burner according to any one of claims 1-6, wherein the intake port of the secondary air intake passage is flush with the intake port of the air mixture passage; the two The side wall of the end of the secondary air intake channel away from the air inlet port is recessed inward to form an air passage plate portion, and the air passage plate portion is provided with a second via hole, and the second via hole communicates with the secondary air passage. The air outlet is separated from the secondary air intake.

8. The burner of any one of claims 1-6, wherein the first casing has opposing first and second sides, and the second side of the first casing is provided with a snap-fit port that is snapped with the combustion frame;

The first side of the second casing is fixedly connected to the first side of the first casing to form a first connecting portion, and the bottom surface of the first connecting portion forms an abutting plane that abuts the combustion rack.

9. The burner according to any one of claims 1-6, wherein the air outlet port of the main air flow channel is flush with the air outlet port of the auxiliary air flow channel; the top end face of the second housing is The air outlet port protrudes from the main air flow channel.

10. A gas water heater, comprising: a water tank, a fan and the burner according to any one of claims 1-9, the water tank is installed on the top of the burner, and the fan is installed on the the bottom end of the burner, and the air outlet of the fan communicates with the air inlet of the burner.