CN223076918U

CN223076918U - Burners and gas water heaters

Info

Publication number: CN223076918U
Application number: CN202420791514.2U
Authority: CN
Inventors: 徐永发; 范程远; 孙雪林; 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: 2024-04-16
Filing date: 2024-04-16
Publication date: 2025-07-08
Anticipated expiration: 2034-04-16

Abstract

The utility model discloses a burner and a gas water heater. The burner comprises: a shell, a side wall of the shell is provided with a plurality of first vents, the plurality of first vents are arranged side by side, and the lower part of the shell is also provided with at least one second vent; a plurality of fire bars, the plurality of fire bars are arranged side by side and arranged in the shell, a secondary air duct is formed between two adjacent fire bars, the induced section of the fire bar is connected with the corresponding first vent, the fire bar is arranged above the second vent, and the secondary air duct is connected with the second vent. The uniformity of mixing gas and air in the burner fire bar is improved to improve the completeness of gas combustion.

Description

Burner and gas water heater

Technical Field

The invention belongs to the technical field of household appliances, and particularly relates to a combustor and a gas water heater.

Background

At present, the water heater is a household appliance commonly used in daily life of people. The water heater is classified into a gas water heater, an electric water heater, and the like, wherein the gas water heater is widely used because of its convenient use. Conventional gas water heaters typically include a fan, a burner that burns gas within the burner to heat water flowing through the heat exchanger, a combustion chamber, and a heat exchanger.

As an important part of a gas water heater, chinese patent publication No. CN 114396619A discloses a burner and a gas water heater generally comprising a housing and a plurality of fire rows arranged side by side in the housing. When the fire grate is in use, one part of air is ejected into the fire grate through high-speed fuel gas under the action of the fan and mixed with the fuel gas, the air is called primary air, the other part of air enters the burner through a secondary air plate below the fire grate and participates in combustion above a fire hole of the fire grate, and the air is called secondary air.

However, in the actual use process, because the secondary air is fed through the air equalizing plates at the front part, after entering the shell, the air close to the air equalizing plates is distributed sufficiently, and the air far from the air equalizing plates is not supplied sufficiently, so that insufficient combustion of fuel gas is caused. In view of this, how to design a technology for improving the mixing uniformity of the fuel gas and the air to improve the combustion sufficiency of the fuel gas is a technical problem to be solved by the present utility model.

Disclosure of utility model

The utility model provides a combustor and a gas water heater, which can improve the mixing uniformity of gas and air in a fire row of the combustor so as to improve the combustion sufficiency of the gas.

In order to achieve the technical purpose, the utility model is realized by adopting the following technical scheme:

in one aspect, the present utility model provides a burner comprising:

a plurality of first ventilation openings are formed in one side wall of the shell, the first ventilation openings are arranged side by side, and at least one second ventilation opening is formed in the lower portion of the shell;

The fire row is arranged side by side and is arranged in the shell, a secondary air channel is formed between two adjacent fire rows, the injection section of the fire row is connected with the corresponding first ventilation opening, the fire row is arranged above the second ventilation opening, and the secondary air channel is communicated with the second ventilation opening.

In one embodiment of the application, a bending surface is formed at the bottom of the shell, the bending surface is matched with the lower outline of the fire grate, and the second ventilation opening is formed on the bending surface.

In one embodiment of the application, the bottom of the fire row forms a downward extending extension part, and the injection section is formed on the extension part;

A first lap joint part is formed between the end part of the fire row, which is far away from the injection port of the injection section, and the extension part;

The bending surface is provided with a first mounting surface and a second mounting surface, the first mounting surface is higher than the second mounting surface, the second ventilation opening comprises a first sub-opening and a second sub-opening, the first sub-opening is formed on the first mounting surface, and the second sub-opening is formed on the second mounting surface;

wherein the first overlap is disposed above the first mounting surface and the extension is disposed above the second mounting surface.

In one embodiment of the application, a second lap joint part is formed between the end part of the fire row adjacent to the injection port of the injection section and the extension part;

The second mounting plate is provided with a third mounting surface which is higher than the second mounting surface, and the second mounting surface is positioned between the first mounting surface and the third mounting surface;

the second air vent comprises a third sub-air vent which is formed on the third mounting surface;

wherein the second overlap is disposed above the third mounting surface.

In an embodiment of the present application, the first mounting surface is provided with a plurality of first sub-tuyeres arranged side by side;

And/or the first sub-air opening is a strip-shaped hole, extends along the length direction of the fire row and is positioned at one side of the fire row.

In an embodiment of the present application, the second mounting surface is provided with a plurality of second sub-tuyeres arranged side by side, the second sub-tuyeres are bar-shaped holes, and the second sub-tuyeres extend along the length direction of the fire row;

or, the second mounting surface is provided with at least one second sub-tuyere, and the second sub-tuyere extends along the length direction perpendicular to the fire row.

In an embodiment of the present application, a plurality of third sub-tuyeres are arranged side by side on the third mounting surface;

And/or the third sub-air opening is a strip-shaped hole, and extends along the length direction of the fire row.

In an embodiment of the application, the shell comprises a first mounting plate, a second mounting plate and a bottom plate, wherein the cross section of the first mounting plate is of a U-shaped structure, the second mounting plate is connected between two end parts of the first mounting plate, the first mounting plate and the second mounting plate form an annular enclosure, and the bottom plate is arranged at the bottom of the second mounting plate;

The first ventilation opening is formed in the second mounting plate, and the second ventilation opening is formed in the bottom plate.

In one embodiment of the application, the housing further comprises an inner liner plate disposed on an inner wall of the first mounting plate and disposed outside the fire row;

A positioning part extending towards the direction of the second mounting plate is arranged at the position, opposite to the second mounting plate, of the inner lining plate, and a plurality of positioning clamping grooves are formed in the edge of the positioning part;

wherein, the fire row is blocked in the corresponding positioning clamping groove.

On the other hand, the embodiment of the application also provides a gas water heater, which comprises a shell and the burner, wherein the burner is positioned in the shell.

Through setting up the second ventilation mouth in the bottom of shell, the second ventilation mouth is arranged and is arranged the bottom of arranging at the fire and can be distributed according to the requirement of secondary ventilation, and then in the use, can ensure that fire row different positions department overgrate air distributes evenly to improve gas and air mixing homogeneity in order to improve gas combustion sufficiency.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic view of a burner embodiment of the present utility model;

FIG. 2 is a second schematic structural view of a burner embodiment of the present utility model;

FIG. 3 is a third schematic structural view of a burner embodiment of the present utility model;

FIG. 4 is a schematic view of the first mounting plate of FIG. 1;

FIG. 5 is a schematic view of the second mounting plate of FIG. 1;

FIG. 6 is a schematic view of the structure of the lining panel of FIG. 1;

FIG. 7 is one of the assembled views of the fire grate and the housing of the burner embodiment of the present utility model;

FIG. 8 is a second view of the assembly of a fire grate and a housing in a burner embodiment of the present utility model;

FIG. 9 is a schematic diagram of a fire grate according to an embodiment of the present utility model;

FIG. 10 is a second schematic view of a fire grate according to an embodiment of the present utility model;

FIG. 11 is a cross-sectional view of one embodiment of a fire grate of the present utility model;

FIG. 12 is a third schematic view of a fire grate according to an embodiment of the present utility model;

Fig. 13 is an enlarged partial schematic view of the area a in fig. 12.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, in the description of the present utility model, terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate directions or positional relationships based on the 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 elements must have a specific orientation, be constructed and operated in a specific orientation, and thus are not to be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

The gas water heater adopts gas as main energy material, and the high temperature heat generated by combustion of the gas is transferred to cold water flowing through a heat exchanger to achieve the purpose of preparing hot water.

Gas water heaters typically include a housing, and a burner, heat exchanger, fan, and fan housing disposed within the housing.

The gas is conveyed to the burner, and is ignited by the ignition device, so that the burner combusts the conveyed gas, and heat is further generated.

The heat exchanger is internally provided with a heat exchange tube, one end of the heat exchange tube is communicated with a water supply pipeline, and the other end of the heat exchange tube is communicated with a shower head or a tap.

The heat generated by the combustion of the fuel gas by the burner is used for heating the heat exchange tube so as to raise the water temperature in the heat exchange tube to form hot water.

When the gas water heater works, cold water provided by the water supply pipeline flows into the heat exchange pipe, is heated into hot water by the heating source generated by the burner, and flows out of the shower head or the water tap through the hot water valve for users to use.

Meanwhile, in the operation of the gas water heater, the fans are electrified and run simultaneously, and under the action of the fans, the flue gas generated by the burner is discharged outdoors.

As shown in fig. 1-8, an embodiment of the present application provides a burner comprising a housing 2 and a plurality of fire rows 1, a plurality of the fire rows 1 being arranged side by side and disposed in the housing 2, the fire rows 1 having an injection section for introducing fuel gas and primary air for combustion.

In the first embodiment, in order to improve the uniformity of the distribution of the secondary air of the fire grate 1, to ensure the uniformity of the mixture of the fuel gas and the air at each position of the fire grate 1 to improve the fuel gas combustion sufficiency, the following structural improvements are made to the housing 2 and the fire grate 1.

A plurality of first ventilation openings 201 are formed in one side wall of the shell 2, the first ventilation openings 201 are arranged side by side, and at least one second ventilation opening 202 is formed in the lower portion of the shell 2;

And a secondary air channel is formed between two adjacent fire rows 1, the injection section of the fire row 1 is connected with the corresponding first ventilation opening 201, the fire row 1 is arranged above the second ventilation opening 202, and the secondary air channel is communicated with the second ventilation opening 202.

Specifically, after the fire grate 1 is installed in the shell 2, the injection port of the injection section of the fire grate 1 is in butt joint with the first ventilation opening 201 on the shell 2, and the primary air of gas mixing enters the injection port through the first ventilation opening. And after gas and primary air mix in fire row 1 and are lighted from the venthole output of fire row 1, secondary air then is introduced into shell 2 through the second ventilation opening 202 that shell 2 bottom set up to, second ventilation opening 202 is owing to arrange in the bottom of shell 2, can be convenient carry out the trompil design according to the demand of fire row 1 different positions to the secondary air, in order to ensure that the secondary air can more even distribution in the venthole department of each position of fire row 1, and then realize gas and secondary air intensive mixing, improve combustion efficiency.

After the secondary air enters the shell 2 through the second air port 202, the secondary air enters a secondary air channel formed between the fire rows 1, and the secondary air flows to the air outlet holes of the fire rows 1 along the secondary air channel.

In some embodiments, the bottom of the housing 2 forms a bending surface, the bending surface matches the lower outline of the fire grate 1, and the second ventilation opening 202 is formed on the bending surface.

Specifically, for the fire grate 1, the top of the fire grate is generally flat due to the configuration of the air outlet holes, and the bottom of the fire grate 1 has a height difference due to the profiling design. Therefore, in order to ensure that the air flow entering the housing 2 through the different second air inlets 202 can quickly enter the corresponding part of the secondary air channel, the bottom of the housing 2 is designed to be a bending surface, so that the bending surface matches the bottom contour of the fire grate 1, and further, the air inlet quantity of the secondary air channel is reduced due to the fact that a larger interval space is formed at the bottom of the fire grate 1.

In one embodiment, an extending portion 101 extending downwards is formed at the bottom of the fire row 1, and the injection section is formed on the extending portion 101;

a first lap joint part 102 is formed between the end part of the fire row 1, which is far away from the injection port of the injection section, and the extension part 101;

The bending surface has a first mounting surface 203 and a second mounting surface 204, the first mounting surface 203 is higher than the second mounting surface 204, the second ventilation opening 202 comprises a first sub-opening 2021 and a second sub-opening 2022, the first sub-opening 2021 is formed on the first mounting surface 203, and the second sub-opening 2022 is formed on the second mounting surface 204;

Wherein the first overlap 102 is disposed above the first mounting surface 203 and the extension 101 is disposed above the second mounting surface 204.

Specifically, for the structural design requirement of the profiling, the fire grate 1 is provided with an extension 101 at the bottom thereof to form an injection section. At this time, the end of the fire row 1 away from the port facilitates the generation of a height difference between the extension portions 101 to form the first overlap portion 102. In order to ensure the air intake, the bent surface may form the first installation surface 203 to be closely attached to the bottom of the first overlap portion 102, so that the installation requirement may be met, and the secondary air introduced by the first sub-air opening 2021 on the first installation surface 203 may directly enter the secondary air channel where the first overlap portion 102 is located, so as to ensure sufficient supply of the secondary air.

In another embodiment, a second lap joint part 103 is formed between the end part of the fire row 1 adjacent to the injection port of the injection section and the extension part 101;

The second mounting plate 22 has a third mounting surface 205, the third mounting surface 205 being higher than the second mounting surface 204, the second mounting surface 204 being located between the first mounting surface 203 and the third mounting surface 205;

The second air vent 202 includes a third sub-air vent 2023, the third sub-air vent 2023 being formed on the third mounting surface 205;

Wherein the second overlap is disposed above the third mounting surface 205.

Specifically, the second overlapping portion 103 is formed corresponding to the end of the fire grate 1 near the injection section for installation, and the fire grate 1 is overlapped on the third installation surface 205 through the second overlapping portion 103. Meanwhile, in order to meet the requirement of sufficient supply of secondary air at the second overlap 103, a third sub-air opening 2023 is further provided on the third mounting surface 205, and the third sub-air opening 2023 is immediately adjacent to the bottom of the second overlap 103, so that secondary air introduced by the third sub-air opening 2023 can directly enter the secondary air channel. Thus, sufficient secondary air supply can be obtained at each position of the fire grate 1, so that the mixing uniformity of the fuel gas and the air is improved, and the combustion sufficiency of the fuel gas is further improved.

In some embodiments, a plurality of the first sub-tuyeres 2021 are provided on the first mounting surface 203, and are arranged side by side, so that secondary air is supplied through the plurality of first sub-tuyeres 2021 being uniformly distributed at the bottom of each fire row 1. The first sub-air openings 2021 may be configured as strip-shaped holes, and the first sub-air openings 2021 extend along the length direction of the fire row 1 and are located at one side of the fire row 1.

In some embodiments, the second mounting surface 204 is provided with a plurality of second sub-tuyeres 2022 arranged side by side, and the second sub-tuyeres 2022 are strip-shaped holes, and the second sub-tuyeres 2022 extend along the length direction of the fire row 1. Specifically, there may be a plurality of second sub-tuyeres 2022, and the second sub-tuyeres 2022 also extend along the length direction of the fire row 1.

Or the second mounting surface 204 is provided with at least one second sub-tuyere 2022, and the second sub-tuyere 2022 extends along a direction perpendicular to the length direction of the fire grate 1. Specifically, the second sub-tuyere 2022 may be one and occupy enough space on the second mounting surface 204 to meet the secondary air intake requirement of the large area of the bottom of the multi-row fire grate 1.

In some embodiments, a plurality of the third sub-tuyeres 2023 are provided on the third mounting surface 205, and are arranged side by side, so that secondary air is supplied through the plurality of third sub-tuyeres 2023 being uniformly distributed at the bottom of each fire row 1. The third sub-tuyeres 2023 may be formed as strip-shaped holes, and the third sub-tuyeres 2023 may extend along the length direction of the fire row 1.

Through setting up second ventilation opening 202 in the bottom of shell 2, second ventilation opening 202 arranges and can distribute according to the requirement of secondary ventilation in the bottom of fire row 1, and then in the use, can ensure that fire row 1 different positions department overgrate air distributes evenly to improve gas and air mixing homogeneity in order to improve gas combustion sufficiency.

In the second embodiment, as shown in fig. 1 to 8, for the fire grate 1, a plurality of fire grate 1 are required to be assembled in the shell 2 side by side in sequence, and in order to reduce the use amount of parts, reduce the manufacturing cost and improve the assembly efficiency, the following structural improvements are performed for the shell 2 and the fire grate 1.

The shell 2 comprises an annular enclosing block and a bottom plate 23, wherein a plurality of first ventilation openings 201 are formed in one side wall of the annular enclosing block, and positioning ribs 206 are arranged on the inner surface of the annular enclosing block around the periphery of the first ventilation openings 201;

The fire bars 1 are arranged side by side and are arranged in the shell 2, an injection port of an injection section of the fire bar 1 is connected with the corresponding positioning rib 206, and the fire bars 1 are also clamped in the corresponding installation clamping grooves 207.

The positioning rib 206 has an annular structure, and the positioning rib 206 is inserted into the injection port.

Specifically, in the assembly process, the injection ports of the fire bars 1 are abutted with the positioning ribs 206, so that the injection ports of the fire bars 1 are positioned through the positioning ribs 206, then, the end parts, far away from the positioning ribs 206, of the fire bars 1 are clamped in the positioning clamping grooves 208, and therefore, the fire bars 1 can be installed by only utilizing the assembly structure in the shell 2, and then, the fire bars 1 are installed without additionally configuring an independent installation frame, so that the number of parts is reduced, and the assembly efficiency is improved.

In some embodiments, the annular enclosure comprises a first mounting plate 21 and a second mounting plate 22, the cross section of the first mounting plate 21 is in a U-shaped structure, the second mounting plate 22 is connected between two ends of the first mounting plate 21, and the bottom plate 23 is arranged at the bottom of the second mounting plate 22;

wherein the second mounting plate 22 is provided with the first ventilation opening 201 and the positioning ribs 206.

Specifically, for the annular enclosure, it is a split structure, the first mounting plate 21 is a semi-surrounding structure, and the second mounting plate 22 is provided with the first ventilation opening 201 to meet the air intake requirements of the fuel gas and the primary air.

In another embodiment, the outer shell 2 further comprises an inner liner 24, the inner liner 24 being provided on the inner wall of the first mounting plate 21 and being arranged outside the fire row 1;

A positioning part extending towards the second mounting plate 22 is arranged at a position of the inner lining plate 24 opposite to the second mounting plate 22, and a plurality of positioning clamping grooves 208 are arranged at the edge of the positioning part;

wherein, the fire bar 1 is clamped in the corresponding positioning clamping groove 208.

Specifically, in order to reduce heat conduction from the interior of the casing 2 to the outside when the fire grate 1 is burned, a lining plate 24 is provided in the casing 2 to insulate heat, and an air interlayer is formed between the lining plate 24 and the casing 2 to insulate heat.

In addition, by further providing the positioning clamping groove 208 on the inner lining plate 24, the positioning clamping groove 208 can position the end part of the fire grate 1 far away from the injection port, so that the installation accuracy and reliability of the fire grate 1 are more effectively improved.

In some embodiments, for convenience in mounting the inner lining board 24 on the outer shell 2, the first mounting plate 21 is further provided with an inwardly and upwardly extending positioning latch 211, and a lower edge of the inner lining board 24 is clamped between the positioning latch 211 and the first mounting plate 21.

Specifically, when the inner liner 24 is installed, the inner liner 24 is placed on the inner side of the first mounting plate 21 and is supported in a predetermined position by the positioning tongue 211, and then the upper portion of the inner liner 24 may be fixedly coupled to the first mounting plate 21 by reduced screws.

In another embodiment, the positioning ribs 206, the mounting slots 207 and the positioning slots 208, which are connected and matched with the same fire grate 1, are sequentially arranged.

Specifically, after the fire grate 1 is assembled in place, the two ends of the fire grate 1 are limited and fixed by the positioning ribs 206 and the positioning clamping grooves 208, and the bottom of the fire grate 1 can be further fixed by being supported by the mounting clamping grooves 207, so that the fire grate 1 can be firmly assembled into the shell 2.

Wherein the positioning slot 208 is arranged obliquely above the mounting slot 207.

In another embodiment, the bottom plate 23 is provided with a second air vent 202 to meet the requirement of supplying secondary air through the second air vent 202.

In the third embodiment, as shown in fig. 9 to 13, based on the first and second embodiments, the following structural modifications are optionally performed for the fire grate.

The bottom of the fire grate 1 is provided with an injection section 11, a mixing section 12 and a diffusion section 16, the top of the fire grate 1 is provided with an air outlet cavity 13, the injection section 11 is communicated with the air outlet cavity 13 through the mixing section 12 and the diffusion section 16, the fire grate 1 is also provided with an air suction hole 14, the air suction hole 14 is communicated with the mixing section 12 and is arranged close to the injection section 11, the inner wall of the mixing section 12 is also provided with a guide plate 15, and the guide plate 15 is arranged on one side of the air suction hole 14;

Wherein the baffle 15 is configured to direct the gas outside the fire row into the mixing section 12 and to form a helical gas flow.

Specifically, the injection section 11 arranged at the bottom of the fire grate 1 is used for injecting fuel gas and primary air into the fire grate 1, and after the fuel gas and the primary air enter the fire grate 1 through the injection section 11, the fuel gas and the primary air are mixed and conveyed into the mixing section 12.

Since the air suction holes 14 are arranged on the mixing section 12, and the guide plate 15 is arranged on the inner wall of the mixing section 12 in cooperation with the air suction holes 14, for the mixed air flow formed by the fuel gas and the primary air to flow through the guide plate 15, since the guide plate 15 protrudes from the inner wall of the mixing section 12 and is arranged on the inner side of the air suction holes 14, the speed difference exists between the mixed air flowing at high speed in the mixing section 12 and the air near the air suction holes 14 on the outer side of the fire grate 1, the pressure difference is caused by the speed difference, the air near the air suction holes 14 is sucked into the mixing section 12 of the fire grate 1, and the spiral air flow is formed under the guidance of the guide plate 15, so that the uniformity of mixing the fuel gas and the air is further improved.

In the actual use process, after the gas outside the fire grate 1 enters the mixing section 12 of the fire grate 1 through the side air suction holes 14, the shearing force is generated due to the speed difference between the gas and the gas in the mixing section 12, so that small vortex is formed at the air suction holes, the mixing of the gas and the air can be promoted, and the leakage of the mixed gas from the air suction holes can be effectively prevented.

The flue gas generated by combustion can enter the fire grate through the air suction port and be mixed with fuel gas and primary air, and after entering the fire grate 1, the oxygen content of the mixed gas in the mixing section 12 can be reduced, so that the combustion temperature is reduced, and the content of thermal nitrogen oxides is reduced.

Because the thermal nitrogen oxide is generated by the reaction of nitrogen and oxygen in a high-temperature environment, and the higher the temperature is, the more the thermal nitrogen oxide is generated, so that the reduction of the oxygen content and the combustion temperature can effectively reduce the generation of the thermal nitrogen oxide. Therefore, the smoke recirculation in the combustion chamber is realized through the air suction holes 14, so that the content of nitrogen oxides in the smoke can be effectively reduced, and low nitrogen emission is realized.

The fire grate 1 provided by the application can improve the mixing uniformity of fuel gas and air in the fire grate 1, adjust the proportion of secondary air and reduce the content of nitrogen oxides in flue gas, and is provided with the air suction holes 14 and the guide plates 15.

In addition, part of the secondary air can enter the fire grate 1 through the air intake holes 14 and the baffle 15 to become primary air, thus providing a new method of adjusting a secondary air ratio.

In addition, part of the flue gas can also enter the fire grate 1 through the air suction holes 14 and the guide plates 15, so that the flue gas can be recycled, the oxygen concentration is reduced, the combustion temperature is reduced, and the content of nitrogen oxides is reduced. Therefore, by arranging the air suction holes 14 and the guide plates 15, three problems of improving the mixing uniformity of the fuel gas and the air in the fire grate 1, adjusting the proportion of secondary air and reducing the content of nitrogen oxides in the flue gas can be simultaneously realized, and the air suction device is simple and feasible, has obvious effect, can effectively improve the working performance of the fuel gas water heater and effectively reduce the content of pollutants.

In one embodiment of the present application, the air intake holes 14 are formed on the fire grate 1 by punching, and the portion of the fire grate 1 that is punched into the mixing section 12 forms the baffle 15.

Specifically, in order to facilitate the processing of the air suction hole 14 and the deflector 15 on the fire grate 1, since the fire grate 1 is generally processed by a sheet metal member, the air suction hole 14 can be punched on the sheet metal member by a punching manner during the processing of the fire grate 1, and the deflector 15 is formed by forming the portion of the air suction hole 14 protruding by punching.

In an embodiment of the present application, the fixed end of the deflector 15 is fixedly connected to the fire grate 1, and the free end of the deflector 15 extends obliquely toward a direction away from the air intake hole 14.

Specifically, a pressure difference is formed at the suction hole 14 due to a difference in velocity between the high-velocity air flow in the mixing section and the air outside the suction hole 14, so as to suck the air discharged from the fire. Because the baffle 15 is in a raising structure on the inner wall of the mixing section 12, the baffle 15 is used for guiding the gas outside the fire grate to enter the mixing section 12 of the fire grate through the suction holes 14 and guiding the gas to form spiral gas flow.

In an embodiment of the present application, the fixed end of the deflector 15 is close to the injection section 11, and the free end of the deflector 15 extends in a direction away from the injection section 11.

Specifically, in order to guide the air flow entering the mixing section 12 through the baffle 15, the fixed end of the baffle 15 is close to the ejector section 11, so that the air flow entering the mixing section 12 flows along the surface of the baffle 15 from the fixed end of the baffle 15.

At least three reasons for preventing the leakage and overflow of the mixed gas are that the mixed gas is blocked by a guide plate, that the pressure difference is caused by the speed difference between the high-speed air flow in the mixing section 12 and the air outside the air suction hole 14, and that the small vortex is near the air suction hole 14. In this way, the mixed gas flow within the mixing section 12 can be more effectively blocked from overflowing.

In one embodiment of the present application, the air suction holes 14 are bar-shaped holes, and the air suction holes 14 are arranged obliquely along the air flow direction in the mixing section 12.

Specifically, the gas mixture flowing at a high speed in the mixing section 12 and the gas in the vicinity of the suction holes 14 on the outer side of the fire grate 1 have a speed difference, which results in the formation of a pressure difference at the suction holes, and the gas in the vicinity of the suction holes 14 on the outer side of the fire grate 1 is sucked into the mixing section 12 of the fire grate 1.

Because the air suction holes are obliquely arranged relative to the mixed air flow flowing in the mixing section, the air entering the mixing section flows obliquely relative to the mixed air flow through the guide plate, so that a spiral air flow can be formed in the mixing section, the spiral air flow can promote the full mixing of the fuel gas and the air, and the mixing uniformity and flame stability of the fuel gas and the air at the fire holes of the fire row 1 are improved.

In one embodiment of the application, the air suction holes 14 and the guide plates 15 arranged on one side of the fire row 1 extend obliquely upwards in the air flow direction in the mixing section 12, and the air suction holes 14 and the guide plates 15 arranged on the other side of the fire row 1 extend obliquely downwards in the air flow direction in the mixing section 12.

Specifically, the two sides of the fire grate 1 are respectively provided with the air suction holes 14 and the guide plates 15 on the mixing section 12, and the inclined extending directions of the air suction holes 14 and the guide plates 15 distributed on the two sides are opposite.

After the gas outside the fire grate 1 is sucked into the mixing section of the fire grate 1 through the suction holes at the two sides, the flowing directions of the sucked gas at the two sides in the mixing section are opposite (refer to the flowing direction of the gas entering the mixing section shown by the arrow in fig. 13), so that the mixed gas in the mixing section flows in a whole spiral way, and the mixing uniformity of the gas and the air is ensured to the greatest extent.

That is, the air outside the fire exhaust can be guided to be sucked into the mixing section 12 through the air suction holes 14 by the air deflectors 15 positioned at both sides in the mixing section 12, and the sucked air and the air flow input into the mixing section 12 from the injection section 11 are mixed in the mixing section 12 and form a spiral air flow in a spiral conveying mode.

In one embodiment of the present application, a plurality of the air intake holes 14 are arranged on the fire grate 1 side by side along the air flow direction in the mixing section 12.

In one embodiment of the present application, the fire row 1 is provided with a plurality of the air suction holes 14 in parallel along the direction perpendicular to the air flow direction in the mixing section 12.

In one embodiment of the present application, a plurality of air intake holes 14 are arranged in an array on the fire grate 1.

In another embodiment of the present application, the tilting angle of the tilted baffle 15 in the mixing section 12 may be adjusted according to the need, which is not limited herein.

In another embodiment of the application, for the fire grate, only the ejector section 11 and the diffuser section 16 may be provided, i.e. the ejector section 11 is connected to the diffuser section 16. Correspondingly, the suction holes 14 and the deflector 15 are formed on the diffuser 16, and the deflector 15 is configured to guide the gas outside the fire row into the diffuser 16 and to form a spiral gas flow.

The airflow flowing manner of the air suction hole 14 and the baffle 15 arranged on the diffuser 16 is similar to that of the air suction hole 14 and the baffle 15 arranged on the mixing section in the above embodiment, and will not be described herein.

On the other hand, the embodiment of the application also provides a gas water heater, which comprises the burner in the embodiment.

In particular, gas water heaters typically include a housing, and a heat exchanger and a burner disposed in the housing. The shell is also provided with a fan correspondingly to drive air into the burner, and meanwhile, the fan is used for driving the flue gas in the combustion chamber to be discharged to the outside.

The fire grate 1 is provided with a suction hole 14 communicated with a mixing section 12 or a diffusion section 16. Taking the configuration of the air suction holes and the guide plates in the mixing section 12 as an example, in the use process, a speed difference exists between the mixed gas flowing at a high speed in the mixing section 12 and the gas near the air suction holes 14 on the outer side of the fire grate 1, and the pressure difference is caused by the speed difference, so that the gas near the air suction holes 14 is sucked into the mixing section 12 of the fire grate 1, and a spiral airflow is formed under the guidance of the guide plates 15.

In this way, the gas outside the fire grate 1 can be further sucked into the mixing section 12 to increase the air quantity mixed with the gas, and the air flow of the mixing section 12 can be more uniformly mixed with the gas under the flow guiding effect of the guide plate 15, the uniformly mixed air flow enters the air outlet cavity 13 and finally burns to release heat, and the mixed gas in the air outlet cavity 13 is more uniformly mixed, so that the flame distribution of the combustion of the fire grate 1 is uniform, and the uniformity of mixing the gas and the air in the fire grate of the burner is improved to improve the combustion sufficiency of the gas.

The above embodiments are only for illustrating the technical solution of the present utility model, but not for limiting the same, and although the present utility model has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that modifications may be made to the technical solution described in the above embodiments or equivalents may be substituted for some of the technical features thereof, and the modifications or substitutions do not depart from the spirit and scope of the technical solution as claimed in the present utility model.

Claims

1. A burner for a gas turbine, which burner comprises a burner body, characterized by comprising the following steps:

2. The burner of claim 1, wherein the bottom of the housing defines a curved surface that matches the lower profile of the fire grate, and wherein the curved surface defines the second vent.

3. The burner of claim 2 wherein the bottom of the fire row forms a downwardly extending extension, the extension having the ejector section formed thereon;

4. A burner as claimed in claim 3, wherein a second overlap is formed between the end of the fire grate adjacent the injection port of the injection section and the extension;

The shell comprises a first mounting plate, a second mounting plate and a bottom plate, wherein the cross section of the first mounting plate is of a U-shaped structure, the second mounting plate is connected between two end parts of the first mounting plate, the first mounting plate and the second mounting plate form an annular enclosure, and the bottom plate is arranged at the bottom of the second mounting plate;

wherein the second overlap is disposed above the third mounting surface.

5. A burner according to claim 3, wherein the first mounting surface is provided with a plurality of said first sub-tuyeres arranged side by side;

6. A burner according to claim 3, wherein a plurality of said second sub-tuyeres are provided in a side-by-side arrangement on said second mounting surface, said second sub-tuyeres being in the form of strip-shaped apertures, said second sub-tuyeres extending in the length direction of said fire row;

7. The burner of claim 4, wherein a plurality of said third sub-tuyeres are disposed side-by-side on said third mounting surface;

8. The burner of claim 4, wherein the first vent is disposed on the second mounting plate and the second vent is disposed on the bottom plate.

9. The burner of claim 8 wherein the outer shell further comprises an inner liner plate disposed on an inner wall of the first mounting plate and disposed outside of the fire row;

10. A gas water heater comprising a housing, further comprising a burner as claimed in any one of claims 1 to 9, said burner being located in said housing.