阅读说明：本技术 燃烧器和燃气热水器 (Combustor and gas heater ) 是由 尹洪 孟宪超 陈文风 岳宝 于 2018-06-08 设计创作，主要内容包括：本发明提出了一种燃烧器和燃气热水器,其中,燃烧器包括：多个并排设置的燃烧单元,燃烧单元包括：多个并排设置的进气管部,进气管部的一端设置有引射口；混流部,混流部的一端与多个进气管部的另一端连通,以能够使气流通过进气管部进入混流部,混流部具有分流结构,分流结构用于对进入混流部的气流进行分流,混流部的另一端设置有燃烧段,燃烧段上开设有燃烧口,其中,气流包括空气与燃气。通过本发明的技术方案,能够增加空气的引入量,并能够使进入混流部内的燃气与空气的气流混合更加均匀,以降低使用污染。(The invention provides a burner and a gas water heater, wherein the burner comprises: a plurality of combustion units that set up side by side, combustion unit includes: the air inlet pipe parts are arranged side by side, and one end of each air inlet pipe part is provided with an injection port; mixed flow portion, the one end of mixed flow portion and the other end intercommunication of a plurality of inlet tube portion to can make the air current pass through inlet tube portion and get into mixed flow portion, mixed flow portion has the reposition of redundant personnel structure, and the reposition of redundant personnel structure is used for shunting the air current that gets into mixed flow portion, and the other end of mixed flow portion is provided with the combustion section, has seted up the burner port on the combustion section, and wherein, the air current includes air and gas. Through the technical scheme of the invention, the introduction amount of air can be increased, and the gas entering the mixed flow part and the air flow of the air can be mixed more uniformly, so that the use pollution is reduced.)

1. a burner comprising a plurality of combustion units arranged side by side, characterized in that said combustion units comprise:

The air inlet pipe comprises a plurality of air inlet pipe parts arranged side by side, wherein one end of each air inlet pipe part is provided with an injection port;

The mixed flow part is provided with a flow distribution structure used for distributing the air flow entering the mixed flow part, the other end of the mixed flow part is provided with a combustion section, and the combustion section is provided with a combustion port,

wherein the airflow comprises air and gas.

2. The burner of claim 1,

The reposition of redundant personnel structure has a plurality ofly, and is a plurality of reposition of redundant personnel structure and a plurality of the inlet pipe portion corresponds the setting one by one along the direction of admitting air to adjacent two can construct between the reposition of redundant personnel structure and establish the formation the intercommunication portion of inlet pipe portion.

3. The burner of claim 1,

The shunting structure is a shunting groove structure formed by inwards sunken arrangement structures of the outer side wall of the mixed flow part.

4. The burner of claim 3,

The shunting groove structure comprises a groove bottom wall and a groove side wall which are connected with each other, the groove side wall is obliquely arranged towards the inner side of the groove along the sinking direction,

Wherein the inclination angle of the side wall of the groove is greater than or equal to 30 degrees and less than or equal to 60 degrees.

5. The burner of claim 3,

the flow dividing groove structure comprises a first directional side wall and a second directional side wall which are connected along the air inlet direction, the first directional side wall is formed along the air inlet direction towards the inner side of the flow mixing part in an inclined structure, the second directional side wall is formed along the air inlet direction towards the outer side of the flow mixing part in an inclined structure,

Wherein an included angle between the first forward side wall and the side wall of the mixed flow portion is greater than or equal to 20 degrees and less than or equal to 30 degrees, and an included angle between the second forward side wall and the side wall of the mixed flow portion is greater than or equal to 50 degrees and less than or equal to 70 degrees.

6. the burner according to claim 4 or 5,

The shunting groove structures are respectively and symmetrically arranged on the two opposite side walls of the flow mixing part,

Wherein the minimum clearance between the shunting groove structures is more than or equal to 1.5mm and less than or equal to 2.5 mm.

7. The burner according to any one of claims 1 to 5,

the combustion port is configured as a plurality of combustion holes opened in a side-by-side direction of the plurality of intake pipe portions;

the length dimension of the plurality of combustion holes in the length direction of the combustion section is greater than or equal to 128mm and less than or equal to 150 mm;

The height of the combustion section is greater than or equal to 5mm and less than or equal to 7 mm;

The width of the combustion section is greater than or equal to 16mm and less than or equal to 24 mm;

The plurality of combustion holes comprise a plurality of combustion hole modules which are arranged at intervals along the length direction of the combustion section, and the width of each combustion hole module is greater than or equal to 8mm and less than or equal to 10 mm;

the distance between the front ends of two adjacent combustion hole modules is greater than or equal to 10mm and less than or equal to 15 mm.

8. The burner according to any one of claims 1 to 5,

The number of the air inlet pipe sections is 3;

And a connecting plate is arranged between every two adjacent air inlet pipe sections, and water pipe through holes are formed in the connecting plate so as to form water pipe loop channels on the plurality of combustion units which are arranged in parallel, wherein the water pipe loop channels are used for installing U-shaped cooling water pipes.

9. The burner according to any one of claims 1 to 5,

the gas inlet pipe part comprises an injection port, a contraction section, a mixing section and a diffusion section which are communicated with each other in sequence along the gas inlet direction,

The cross section area of the cross section of the contraction section is gradually reduced along the air inlet direction, and the cross section area of the cross section of the diffusion section is gradually increased.

10. The burner of claim 9, wherein the combustion unit further comprises:

And the expansion step structure is arranged at the joint of the diffusion section and the flow dividing structure.

11. A gas water heater, comprising:

A burner as claimed in any one of claims 1 to 10.

Technical Field

the invention relates to the field of water heaters, in particular to a burner and a gas water heater.

Background

Along with the continuous perfection of gas supply infrastructure and the price advantage of gas, the popularization rate of gas water heaters in household application is higher and higher, and the gas water heaters are widely accepted in the market due to the fact that heat storage is not needed for the instant gas water heater products, electricity is not needed for heating water, a better energy-saving effect is achieved, and therefore the combustion performance of the gas water heaters is further improved, and the gas water heaters are of great significance in further improving the use effect of the products and saving energy consumption.

Disclosure of Invention

In order to solve at least one of the above technical problems, an object of the present invention is to provide a burner.

Another object of the present invention is to provide a gas water heater.

To achieve the above object, an embodiment of a first aspect of the present invention proposes a burner comprising: a plurality of combustion units that set up side by side, combustion unit includes: the air inlet pipe parts are arranged side by side, and one end of each air inlet pipe part is provided with an injection port; mixed flow portion, the one end of mixed flow portion and the other end intercommunication of a plurality of inlet tube portion to can make the air current pass through inlet tube portion and get into mixed flow portion, mixed flow portion has the reposition of redundant personnel structure, and the reposition of redundant personnel structure is used for shunting the air current that gets into mixed flow portion, and the other end of mixed flow portion is provided with the combustion section, has seted up the burner port on the combustion section, and wherein, the air current includes air and gas.

In this technical scheme, the combustor includes a plurality of combustion units that set up side by side, and be provided with a plurality of injection mouths on every combustion unit, in order to introduce the inlet duct portion with gas and surrounding air through injecting the mouth, and get into mixed flow portion through inlet duct portion, on the one hand, through setting up a plurality of inlet duct portions, can increase the quantity and the injection area of injecting the mouth, in order to spout under the unchangeable prerequisite of volume at the gas, increase the introduction volume of air, and then can reduce the emission of burning pollutant, on the other hand, through set up the reposition of redundant personnel structure in mixed flow portion, make the gas that gets into in the mixed flow portion mix more evenly with the air current of air, thereby can further promote the combustion efficiency of gas, and then further reduce the emission of burning pollutant, reduce and use the pollution.

The flow dividing structure can be an independent flow dividing component arranged in the flow mixing part, and can also be an integrated flow dividing structure formed by stamping the side wall of the flow mixing part.

Specifically, each combustion unit may be configured to include a plurality of air intake pipe portions arranged longitudinally side by side, a mixed flow portion arranged horizontally relative to the air intake pipe portion at an outlet end of the air intake pipe portion, and a flow distribution structure provided in the mixed flow portion and capable of buffering mixed air flowing into the mixed flow portion to enable air and gas to be mixed uniformly.

In addition, the burner provided by the invention in the above embodiment may further have the following additional technical features:

In the above technical solution, preferably, the flow dividing structure has a plurality of flow dividing structures, the plurality of flow dividing structures and the plurality of intake pipe portions are provided corresponding one by one along the intake direction, and a communicating portion forming the intake pipe portion can be configured between two adjacent flow dividing structures.

in this technical scheme, through corresponding to setting up a plurality of reposition of redundant personnel structures one by one with a plurality of intake pipes, the air current of mixture passes through the inlet pipe portion after, directly corresponds flow direction reposition of redundant personnel structure, and reposition of redundant personnel structure can make the air current of mixture realize the reposition of redundant personnel to before arriving the burner port, promote the homogeneity that the air current mixes, in order after arriving the burner port, make the air-fuel mixture obtain abundant burning.

Furthermore, a flow dividing structure with more than the number of the air inlet pipe parts can be arranged in the flow mixing part in parallel with the air inlet direction, so that the uniformity of air mixing is further improved.

In any one of the above technical solutions, preferably, the flow dividing structure is a flow dividing groove structure formed by a structure in which an outer side wall of the flow mixing portion is recessed inward.

in this technical scheme, carry out the punching press in order to form the recessed groove structure to the inboard through the outer wall to mixed flow portion, inboard formation protruding structure at mixed flow portion, on the one hand, the protruding structure through inside blocks the air current that gets into mixed flow portion, and realize the reposition of redundant personnel of both sides, finally reach the purpose of air current homogeneous mixing, on the other hand, preparation mode through the punching press generates groove structure, preparation mode is simple, and can the maximize utilizes the inner space of mixed flow portion, thereby be favorable to reducing the air current resistance, when setting up the reposition of redundant personnel structure, guarantee the smoothness nature that the air current flows.

in any of the above technical solutions, preferably, the shunting groove structure includes a groove bottom wall and a groove side wall that are connected to each other, and the groove side wall is inclined toward the inner side of the groove along the depression direction, and an inclination angle of the groove side wall is greater than or equal to 30 ° and less than or equal to 60 °.

In this technical scheme, can construct the groove structure who has the diapire with reposition of redundant personnel groove structure, groove structure's diapire forms the water conservancy diversion face in the inboard of mixed flow portion, be connected with the recess diapire, the recess lateral wall is along the inboard slope of sunken direction to the recess, form the passageway that contracts gradually along the direction of admitting air at mixed flow portion inboard after, flow along the water conservancy diversion face, then through the passageway that expands gradually, reach the burner port at last, at the air current flow in-process, through pressure boost and diffusion, promote the homogeneity that the air current mixes.

In any of the above technical solutions, preferably, the flow dividing groove structure includes a first upward sidewall and a second upward sidewall connected in the air intake direction, the first upward sidewall is formed in an inclined configuration toward an inner side of the flow mixing portion in the air intake direction, the second upward sidewall is formed in an inclined configuration toward an outer side of the flow mixing portion in the air intake direction, an included angle between the first upward sidewall and a sidewall of the flow mixing portion is greater than or equal to 20 ° and less than or equal to 30 °, and an included angle between the second upward sidewall and a sidewall of the flow mixing portion is greater than or equal to 50 ° and less than or equal to 70 °.

In this technical scheme, reposition of redundant personnel groove structure can also set up to the recess lateral wall that two reverse slopes's lateral wall butt joint formed, and two reverse slopes's lateral wall passes through transition fillet and connects to contained angle between the lateral wall of first to lateral wall and mixed flow portion is less than the contained angle between the lateral wall of second to lateral wall and mixed flow portion, and the diffusion angle that the second formed to the lateral wall is bigger promptly, and then is favorable to promoting the combustion efficiency of air current at combustion opening department.

Preferably, the angle between the second lateral wall and the side wall of the flow mixing portion is 60 °.

In any of the above technical solutions, preferably, the shunting groove structures are respectively symmetrically disposed on two opposite side walls of the flow mixing portion, wherein a minimum gap between the shunting groove structures is greater than or equal to 1.5mm and less than or equal to 2.5 mm.

in the technical scheme, the shunting groove structures are respectively and symmetrically arranged on two sides of the flow mixing part to form shunting channels in the flow mixing part, and the optimal arrangement of shunting effect is realized by limiting the size range of the minimum gap between the two shunting groove structures.

preferably, the minimum gap between the shunting groove structures is 1.83 mm.

in any of the above aspects, preferably, the combustion port is configured as a plurality of combustion holes opened in a direction in which the plurality of intake pipe portions are arranged side by side; the length dimension of the plurality of combustion holes in the length direction of the combustion section is greater than or equal to 128mm and less than or equal to 150 mm; the height of the combustion section is greater than or equal to 5mm and less than or equal to 7 mm; the width of the combustion section is more than or equal to 16mm and less than or equal to 24 mm; the plurality of combustion holes comprise a plurality of combustion hole modules which are arranged at intervals along the length direction of the combustion section, and the width of each combustion hole module is greater than or equal to 8mm and less than or equal to 10 mm; the distance between the front ends of two adjacent combustion hole modules is greater than or equal to 10mm and less than or equal to 15 mm.

In this technical scheme, through being constructed the burner port for a plurality of rectangle burner ports that set up side by side, can guarantee the homogeneity of giving vent to anger to promote the homogeneity of gas combustion, length dimension, width dimension and the height dimension through injecing the burning section, in order to inject the volume of burning portion, thereby satisfy the demand that the gas fully combusted.

Specifically, the burner ports may be arranged in 2 rows.

In any of the above technical solutions, preferably, the number of the intake pipe sections is 3; a connecting plate is arranged between two adjacent air inlet pipe sections, a water pipe perforation is formed in the connecting plate, so that water pipe loop channels are formed in the plurality of combustion units which are arranged in parallel, and the water pipe loop channels are used for installing U-shaped cooling water pipes.

In this technical scheme, through set up the water pipe perforation between two adjacent inlet pipe sections, because the combustion unit has a plurality ofly, all correspond on a plurality of combustion units that set up side by side and seted up the water pipe perforation, a plurality of water pipe perforations that set up side by side form the water pipe return passage of installation water pipe in the direction that sets up side by side to the condenser tube of installation U-shaped through setting up condenser tube, realizes the cooling to the combustion area, in order to realize cooling after the burning.

Specifically, with a three-nozzle configuration, that is, three side-by-side intake pipe portions are provided correspondingly, the combustion heat load of each combustion unit can reach 3kW, and the communicating portions of the intake pipe portions can be formed between the first intake pipe portion and the second intake pipe portion, and between the second intake pipe portion and the third intake pipe portion, respectively.

two water pipe perforations are respectively arranged between the first air inlet pipe part and the second air inlet pipe part and between the second air inlet pipe part and the third air inlet pipe part, so that the cooling water pipe can penetrate through the water pipe perforations, the plurality of combustion units can be fixed into a module, and the inlet and the outlet of the cooling water pipe are arranged on the same side.

Wherein, the water pipe can be a copper pipe or a stainless steel pipe and can be directly connected with a heat exchanger water pipe pipeline above the combustor.

In addition, only two intake pipe portions may be provided.

In any one of the above technical schemes, preferably, the air inlet pipe portion sequentially comprises an injection port, a contraction section, a mixing section and a diffusion section which are communicated with each other along the air inlet direction, wherein the sectional area of the cross section of the contraction section is gradually reduced along the air inlet direction, and the sectional area of the cross section of the diffusion section is gradually increased.

in the technical scheme, the injection port, the contraction section, the mixing section and the diffusion section are sequentially arranged along the air inlet direction, so that the premixing function between fuel gas and air is realized before the mixed flow part enters, and the circumferential diffusion of air flow after the mixed flow part enters is realized by respectively arranging the contraction section and the diffusion section.

in any of the above technical solutions, preferably, the combustion unit further includes: and the expansion step structure is arranged at the joint of the diffusion section and the flow dividing structure.

In this technical scheme, through expanding the stair structure, with reposition of redundant personnel groove structure cooperation shaping, the air current of being convenient for is evenly distributed more.

an embodiment of the second aspect of the invention provides a gas water heater, which comprises the burner in any embodiment of the technical scheme of the first aspect of the invention.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

(1) Through setting up a plurality of mouths of drawing, draw the injection volume bigger, and then can promote excessive air coefficient, reduce pollution discharge.

(2) The gas and air are mixed more uniformly in the burner, so that the combustion is more sufficient.

(3) Through setting up the condenser tube return circuit, can reduce combustor upper portion metal construction's temperature, be favorable to further reducing pollutant discharge.

(4) The cooling water pipe can also realize the concatenation of a plurality of burning units to form the burning module, compact structure, the integral erection of being convenient for.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view showing a structure of a burner in the related art

fig. 2 shows a schematic structural view of a combustion unit of a burner according to an embodiment of the present invention:

FIG. 3 shows a schematic structural view of a burner according to an embodiment of the invention;

FIG. 4 shows a schematic side cross-sectional view of a combustion unit according to an embodiment of the invention;

FIG. 5 shows a schematic side cross-sectional view of a combustion unit according to another embodiment of the invention;

FIG. 6 illustrates a schematic structural view of a burner port of a burner according to an embodiment of the present invention;

FIG. 7 is a schematic diagram showing the injection ratio of a burner using an embodiment of the present invention compared with that of a burner of the related art.

wherein, the correspondence between the reference numbers and the part names in fig. 2 to 6 is:

the combustor, 10 combustion units, 102 inlet pipe portion, 1022 draw jet, 104 mixed flow portion, 1042 reposition of redundant personnel structure, 1044 intercommunication portion, 1042A recess diapire, 1042B recess lateral wall, the first lateral wall of 1042C, the second lateral wall of 1042D, 1046 burner ports, 106 water pipe perforation, 20 condenser tube, 1024 constriction segment, 1026 mixing section, 1028 diffusion section, 1048 expansion stair structure.

Detailed Description

in order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A combustor according to some embodiments of the present invention is described below with reference to fig. 2 through 7.

As shown in fig. 2 and 3, the burner 1 according to the embodiment of the present invention includes: a plurality of combustion units 10 arranged side by side, the combustion units 10 comprising: the air inlet pipe parts 102 are arranged side by side, and one end of each air inlet pipe part 102 is provided with an injection port 1022; the mixed flow portion 104, one end of the mixed flow portion 104 communicates with the other end of the plurality of air inlet pipe portions 102 to enable the airflow to enter the mixed flow portion 104 through the air inlet pipe portions 102, the mixed flow portion 104 has a flow dividing structure 1042, the flow dividing structure 1042 is used for dividing the airflow entering the mixed flow portion 104, the other end of the mixed flow portion 104 is provided with a combustion section, a combustion port is formed in the combustion section, and the airflow includes air and fuel gas.

In this embodiment, combustor 1 includes a plurality of combustion unit 10 that set up side by side, and be provided with a plurality of draw mouthful 1022 on every combustion unit 10, in order to draw gas and surrounding air introduction inlet pipe portion 102 in through draw mouthful 1022, and get into mixed flow portion 104 through inlet pipe portion 102, on the one hand, through setting up a plurality of inlet pipe portion 102, can increase the quantity and the area of drawing mouthful 1022, in order to increase the introduction volume of air under the unchangeable prerequisite of gas injection volume, and then can reduce the emission of burning pollutant, on the other hand, through set up reposition of redundant personnel structure 1042 in mixed flow portion 104, make the gas that gets into in mixed flow portion 104 mix more evenly with the air current of air, thereby can further promote the combustion efficiency of gas, and then further reduce the emission of burning pollutant, reduce the use pollution.

The flow dividing structure 1042 may be a separate flow dividing member disposed in the flow mixing portion 104, or an integrated flow dividing structure 1042 formed by stamping a sidewall of the flow mixing portion 104.

Specifically, each combustion unit 10 may be configured to include a plurality of air inlet pipe portions 102 arranged side by side in a longitudinal direction, a flow mixing portion 104 arranged horizontally with respect to the air inlet pipe portions 102 is provided at an outlet end of the air inlet pipe portions 102, and a flow dividing structure 1042 is provided in the flow mixing portion 104, and the flow dividing structure 1042 can buffer a mixed air flow entering the flow mixing portion 104, so that the air and the fuel gas can be uniformly mixed.

In an embodiment of the present application, optionally, the flow dividing structure 1042 has a plurality of flow dividing structures 1042, the flow dividing structures 1042 and the air intake duct portions 102 are arranged in a sequence corresponding to each other along the air intake direction, and a communication portion 1044 forming the air intake duct portion 102 can be arranged between two adjacent flow dividing structures 1042.

in this embodiment, the plurality of flow dividing structures 1042 are arranged corresponding to the plurality of air inlet pipes one by one, the mixed air flow passes through the air inlet pipe portion 102 and then directly flows to the flow dividing structures 1042, and the flow dividing structures 1042 can divide the mixed air flow, so that the uniformity of air flow mixing is improved before reaching the combustion port, and the mixed air flow is fully combusted after reaching the combustion port.

Further, a flow dividing structure 1042 with more than the number of the inlet pipe parts 102 can be arranged in the flow mixing part 104 in parallel with the inlet direction to further improve the uniformity of the gas mixture.

In one embodiment of the present application, the flow splitting structure 1042 is a flow splitting groove structure formed by an inwardly recessed arrangement configuration of an outer sidewall of the flow mixing portion 104.

in this embodiment, through carrying out the punching press in order to form the recessed groove structure to the inboard to mixed flow portion 104 the outer wall, generate protruding structure in mixed flow portion 104's inboard, on the one hand, block the air current that gets into mixed flow portion 104 through inside protruding structure, and realize the reposition of redundant personnel of both sides, finally reach the purpose that the air current mixes evenly, on the other hand, preparation mode through the punching press generates the recessed groove structure, preparation mode is simple, and can the maximize utilizes mixed flow portion 104's inner space, thereby be favorable to reducing the air current resistance, when setting up reposition of redundant personnel structure 1042, guarantee the smoothness nature that the air current flows.

In one embodiment of the present application, as shown in fig. 4, the flow dividing groove structure includes a groove bottom wall 1042A and a groove side wall 1042B connected to each other, the groove side wall 1042B is inclined toward the inner side of the groove along the recess direction, wherein the inclination angle of the groove side wall 1042B is greater than or equal to 30 ° and less than or equal to 60 °.

In this embodiment, the flow dividing groove structure may be configured as a groove structure having a bottom wall, the bottom wall of the groove structure forms a flow guiding surface at the inner side of the flow mixing portion 104, the groove side wall 1042B is connected to the groove bottom wall 1042A, the groove side wall 1042B inclines towards the inner side of the groove along the depression direction, after a gradually contracted channel is formed along the air intake direction at the inner side of the flow mixing portion 104, the flow flows along the flow guiding surface, then passes through the gradually expanded channel, and finally reaches the combustion port, and in the air flow flowing process, the uniformity of air flow mixing is improved by pressurization and diffusion.

In one embodiment of the present application, as shown in fig. 5, the flow dividing groove structure includes a first forward sidewall 1042C and a second forward sidewall 1042D connected in the air intake direction, the first forward sidewall 1042C is formed to be inclined toward the inner side of the flow mixing portion 104 in the air intake direction, and the second forward sidewall 1042D is formed to be inclined toward the outer side of the flow mixing portion 104 in the air intake direction, wherein an angle between the first forward sidewall 1042C and a sidewall of the flow mixing portion 104 is greater than or equal to 20 ° and less than or equal to 30 °, and an angle between the second forward sidewall 1042D and a sidewall of the flow mixing portion 104 is greater than or equal to 50 ° and less than or equal to 70 °.

In this embodiment, the flow dividing groove structure may further be configured as a groove sidewall 1042B formed by abutting two reversely inclined sidewalls, the two reversely inclined sidewalls are connected by a transition fillet, and an included angle between the first forward sidewall 1042C and the sidewall of the flow mixing portion 104 is smaller than an included angle between the second forward sidewall 1042D and the sidewall of the flow mixing portion 104, that is, a diffusion angle formed by the second forward sidewall 1042D is larger, so as to facilitate improving the combustion efficiency of the airflow at the combustion opening.

Optionally, the angle between the second sidewall 1042D and the sidewall of the flow mixing portion 104 is 60 °.

In any of the above embodiments, as shown in fig. 5, optionally, the flow dividing groove structures are symmetrically disposed on two opposite sidewalls of the flow mixing portion 104, wherein a minimum gap between the flow dividing groove structures is greater than or equal to 1.5mm and less than or equal to 2.5 mm.

In this embodiment, the split groove structures are symmetrically disposed on both sides of the flow mixing portion 104 to form split passages in the flow mixing portion 104, and an optimal arrangement of the split effect is achieved by defining a size range of a minimum gap between the two split groove structures.

Optionally, the minimum gap between the shunting groove structures is 1.83 mm.

As shown in fig. 6, in any of the above embodiments, the combustion port is optionally configured as a plurality of combustion holes 1046 opened in the side-by-side direction of the plurality of intake pipe portions 102; a length dimension L1 in the longitudinal direction of the plurality of combustion holes 1046 is 128mm or more and 150mm or less; the height of the combustion section is greater than or equal to 5mm and less than or equal to 7 mm; the width L2 of the combustion section is equal to or greater than 16mm and less than or equal to 24 mm; the plurality of combustion holes comprise a plurality of combustion hole modules which are arranged at intervals along the length direction of the combustion section, and the width L3 of each combustion hole module is 8mm or more and is less than or equal to 10 mm; the distance L4 between the front ends of two adjacent combustion hole modules is equal to 10mm and less than or equal to 15 mm.

In this embodiment, through being constructed the burner port for a plurality of rectangle burning holes 1046 that set up side by side, can guarantee the homogeneity of giving vent to anger to promote the homogeneity of gas combustion, length dimension, width dimension and the height dimension through injecing the burning section, with the volume of injecing the combustion portion, thereby satisfy the demand that the gas fully burns.

Specifically, the burner ports may be arranged in 2 rows.

As shown in fig. 2 and 3, in any of the above embodiments, optionally, the number of the intake pipe sections is 3; a connecting plate is arranged between two adjacent air inlet pipe sections, and a water pipe perforation 106 is arranged on the connecting plate so as to form a water pipe loop channel on the plurality of combustion units 10 arranged in parallel, wherein the water pipe loop channel is used for installing the U-shaped cooling water pipe 20.

in this embodiment, through set up water pipe perforation 106 between two adjacent intake pipe sections, because combustion unit 10 has a plurality ofly, all correspond on a plurality of combustion unit 10 that set up side by side and seted up water pipe perforation 106, a plurality of water pipe perforation 106 that set up side by side form the water pipe loop passageway of installation water pipe in the direction that sets up side by side to the condenser tube 20 of installation U-shaped, through setting up condenser tube 20, realize the cooling to the combustion area, in order to realize cooling after the burning.

specifically, with a three-nozzle configuration, that is, three side-by-side intake duct portions 102 are provided correspondingly, the combustion heat load of each combustion unit 10 may reach 3kW, and the communicating portions 1044 of the intake duct portions 102 can be formed between the first intake duct portion 102 and the second intake duct portion 102, and between the second intake duct portion 102 and the third intake duct portion 102, respectively.

Two water pipe through holes 106 are further formed between the first air inlet pipe portion 102 and the second air inlet pipe portion 102, and between the second air inlet pipe portion 102 and the third air inlet pipe portion 102, respectively, for allowing the cooling water pipes 20 to pass through, and the plurality of combustion units 10 are defined as a module, and the inlets and outlets of the cooling water pipes 20 are disposed on the same side.

Wherein, the water pipe can be a copper pipe or a stainless steel pipe and can be directly connected with the heat exchanger water pipe above the combustor 1.

In addition, only two intake pipe portions 102 may be provided.

as shown in fig. 7, the injection ratio of the burner of the related art is 18.1%, the injection ratio of the burner provided with only two inlet pipe portions 102 is 21.4, and the injection ratio of the burner provided with three inlet pipe portions 102 as shown in fig. 2 and 3 is 26.3.

in any of the above embodiments, as shown in fig. 2, optionally, the intake pipe portion 102 includes an injection port 1022, a contraction section 1024, a mixing section 1026, and a diffusion section 1028, which are communicated with each other, in order along the intake direction, wherein the cross-sectional area of the cross-section of the contraction section 1024 gradually decreases along the intake direction, and the cross-sectional area of the cross-section of the diffusion section 1028 gradually increases.

In this embodiment, the injection port 1022, the contraction section 1024, the mixing section 1026 and the diffusion section 1028 are sequentially arranged along the air intake direction to achieve a premixing function between the fuel gas and the air before entering the mixed flow portion 104, and the contraction section 1024 and the diffusion section 1028 are respectively arranged to achieve circumferential diffusion of the air flow after entering the mixed flow portion 104.

In any of the above embodiments, optionally, the combustion unit 10 further comprises: and the expanding step structure 1048 is arranged at the joint of the diffuser section 1028 and the flow dividing structure 1042.

in this embodiment, the expanding step structure 1048 is matched with the flow dividing groove structure for forming, so that the air flow is more uniformly distributed.

the gas water heater comprises the burner in any one of the embodiments.

In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.