CN212618292U

CN212618292U - Combustor and gas water heater

Info

Publication number: CN212618292U
Application number: CN202022231253.3U
Authority: CN
Inventors: 李鑫; 陆祖安; 梁泽锋; 钱晓林
Original assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-02-26
Anticipated expiration: 2030-09-30

Abstract

The utility model discloses a burner and a gas water heater, wherein, the burner comprises a burning main body, a preheater and a plurality of nozzles; the combustion body is provided with a combustion chamber; the preheater is arranged on the combustion main body and is used for conveying flue gas heated to a target temperature to the combustion chamber; the plurality of nozzles penetrate through the combustion main body and are divided into two nozzle groups which are arranged oppositely, the nozzles are provided with ejection outlets, the ejection outlets of the plurality of nozzles are arranged towards the preheater, and when the plurality of nozzles eject airflow containing fuel gas and/or air into the combustion chamber, the airflow ejected by the two nozzle groups is converged at the air outlet side of the preheater. The utility model discloses improve the nozzle arrangement mode of combustor, strengthened the mixture of combustion products and gas and/or air, also strengthened the mixture of gas and/or air and preheated flue gas, solved under certain operating mode gas heater and can not reach high temperature air combustion state and lead to discharging the problem that exceeds standard.

Description

Combustor and gas water heater

Technical Field

The utility model relates to a combustor technical field especially relates to a combustor and gas heater.

Background

High Temperature Air Combustion (High Temperature Air Combustion) is called mild and deep low oxygen dilution Combustion, and is called soft Combustion as a novel Combustion mode, also called High Temperature Air Combustion. The main characteristics of the combustion are as follows: the chemical reaction mainly takes place in a high-temperature low-oxygen environment, the temperature of the reactants is higher than the autoignition temperature of the reactants, the maximum temperature rise in the combustion process is lower than the autoignition temperature of the reactants, and the volume fraction of oxygen is diluted by combustion products to an extremely low concentration, usually 3-10%. Compared with conventional combustion, in the combustion state, the pyrolysis of fuel is inhibited, the flame thickness is thickened, and the flame front surface disappears, so that the temperature of the whole hearth is very uniform during the combustion, and the emission of pollutants NOx and CO is greatly reduced.

Although the high-temperature air combustion has the advantages, the application of the high-temperature air combustion to the gas water heater is currently in the exploration stage, and the high-temperature air combustion is generally realized by utilizing the structure of the existing gas water heater, for example, the gas is directly injected into the hearth and is directly applied by the existing burner nozzle, the existing burner nozzle is mainly realized by using a fire grate and a metal fiber net (or a porous ceramic plate), and after the application, the uniformity effect of the mixture of the gas and/or air flow sprayed out of the burner nozzle and the flue gas in the hearth is poor, so that the combustion in the hearth is uneven.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a combustor aims at strengthening the mixture of combustion products and gas and/or air, strengthens the mixture of gas and/or air and preheating the flue gas to solve gas heater and can not reach MILD combustion state under certain operating mode and lead to discharging the problem that exceeds standard.

In order to achieve the above object, the present invention provides a burner for a gas water heater, the burner comprising:

a combustion body formed with a combustion chamber;

the preheater is arranged on the combustion main body and used for conveying the flue gas heated to the target temperature to the combustion chamber; and

the nozzles penetrate through the combustion main body and are divided into two nozzle groups which are oppositely arranged, the nozzles are provided with ejection outlets, the ejection outlets of the nozzles are arranged towards the preheater, and when the nozzles eject airflow containing gas and/or air into the combustion chamber, the airflow ejected by the two nozzle groups is converged at the air outlet side of the preheater.

In one embodiment, a first included angle is formed between the direction of the airflow sprayed by each nozzle to the air outlet side of the preheater and the horizontal plane, the opening of the first included angle faces the middle part of the combustion chamber, and the size of the first included angle is 0-60 degrees.

In one embodiment, the combustion chamber comprises a first side wall and a second side wall which are opposite, two nozzle components are arranged on the first side wall and the second side wall, and the distance between two adjacent nozzles on the first side wall and the second side wall is 0mm-40 mm.

In an embodiment, an orthographic projection of the plurality of nozzles on the first side wall on the second side wall is staggered with the plurality of nozzles on the second side wall.

In one embodiment, the preheating device has an outlet end for conveying flue gas to the combustion chamber and an inlet end for introducing fuel gas and air, and the distance between the lowest end of the air flows sprayed by the two nozzle groups and the outlet end of the preheater at the intersection of the air outlet side of the preheater is 20mm-100 mm.

In one embodiment, the burner further comprises:

the pre-mixer is used for accessing fuel gas and air, pre-mixing the fuel gas and the air and conveying mixed gas to the pre-heater;

the preheater ignites and heats the mixed gas to a target temperature and then conveys flue gas to the combustion chamber;

and the distance between the lowest end of the air flows sprayed by the two nozzle groups and the outlet end of the preheater at the intersection of the air outlet sides of the preheater is 10-40 mm.

In one embodiment, the nozzle comprises:

the nozzle body is also provided with an air inlet and an injection channel for communicating the air inlet with the injection outlet;

the injection channel is divided into an air inlet section and an air outlet section from the air inlet to the injection outlet, and the air outlet section is arranged in a bent mode relative to the air inlet section so as to change the flow direction of air flow ejected by the air inlet section.

In one embodiment, the combustion body comprises:

the side plates are enclosed to form a combustion chamber in a cuboid shape, and the nozzles are respectively arranged on the side plates;

the air inlet assembly is mounted on the side plate and is provided with an air inlet cavity, the air inlet cavity is used for being connected with an external air source, and the air inlets of the nozzles are communicated with the air inlet cavity.

In one embodiment, the intake assembly comprises:

the shell is arranged in a hollow shape and is provided with a first opening and a second opening which are oppositely arranged;

the first cover plate is arranged on the first opening in a covering mode;

the second cover plate is covered on the second opening and forms the air inlet cavity together with the shell and the first cover plate in an enclosing manner; and

one end of the mounting plate is mounted on the second cover plate, and the other end of the mounting plate is mounted on a side plate of the combustion main body so as to mount and fix the shell on the side plate of the combustion main body; and the air inlet of the nozzle is fixedly arranged on the second cover plate through the mounting plate and is communicated with the air inlet cavity, and the injection outlet of the nozzle extends into the combustion chamber and is arranged towards the preheater.

In one embodiment, the mounting plate is long and has a plurality of first through holes arranged at intervals along the length direction, and the plurality of nozzles are mounted on the plurality of first through holes in a one-to-one manner.

In an embodiment, the nozzle body is provided with a mounting groove, and the first communicating hole is internally provided with a first positioning protrusion which is mounted and positioned with the mounting groove.

In an embodiment, one end of the nozzle body is provided with a limiting flange, the mounting groove is arranged on the limiting flange, the first connecting hole comprises a first aperture section and a second aperture section, the aperture of the first aperture section is larger than that of the second aperture section, the first positioning protrusion is arranged in the first aperture section, the limiting flange is limited in the first aperture section, and the first positioning protrusion is clamped in the mounting groove, so that the nozzle penetrates through the side plate of the combustion body, and the injection outlet extends into the combustion chamber.

In an embodiment, a second communication hole is formed in a position, corresponding to the first communication hole, of the second cover plate, a second positioning protrusion which is matched with the second communication hole is convexly arranged in the second communication hole and corresponds to the position of the mounting groove, and the second positioning protrusion is clamped into the mounting groove, so that the nozzle is mounted on the air intake assembly, and the air inlet is communicated with the air intake cavity.

In an embodiment, the air intake assembly further comprises a porous plate, and the porous plate is arranged in the air intake cavity and used for adjusting the flow direction of the fuel gas and/or the air.

In order to achieve the above object, the utility model discloses still provide a gas water heater, gas water heater includes:

the water heater comprises a water heater main body, wherein a heat exchange chamber and a smoke outlet communicated with the heat exchange chamber are arranged in the water heater main body;

the heat exchanger is arranged in the heat exchange chamber; and

the burner is the burner, the burner is arranged on the water heater main body, and a smoke outlet of the burner is communicated with the heat exchange chamber; the pre-heater is arranged on a combustion main body of the combustor and used for conveying flue gas heated to a target temperature to the combustion chamber;

the nozzle is used for injecting fuel gas and/or air into the combustion chamber, so that high-temperature air combustion reaction is carried out in the combustion chamber;

the burner includes:

a combustion body formed with a combustion chamber;

In the technical proposal of the utility model, as the burner comprises a burning main body, a pre-heater and a plurality of nozzles, the burning main body is provided with a burning chamber, the pre-heater is arranged on the burning main body, and is used for conveying the flue gas heated to the target temperature to the combustion chamber, a plurality of nozzles are arranged on the combustion main body in a penetrating way, and divided into two oppositely arranged nozzle groups, the nozzles are provided with spraying outlets, the spraying outlets of the plurality of nozzles are arranged towards the preheater, when a plurality of nozzles spray air flow containing fuel gas and/or air into the combustion chamber, the air flow sprayed by the two nozzle groups are converged at the air outlet side of the preheater, the mixing of combustion products and gas and/or air is enhanced, the mixing of the gas and/or air and preheated flue gas is also enhanced, and the problem that the emission exceeds standard due to the fact that a gas water heater cannot reach a high-temperature air combustion state under certain working conditions is solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a top view (section) of a burner according to an embodiment of the present invention;

fig. 2 is a side view (in cross section) of a burner according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a nozzle according to an embodiment of the burner of the present invention;

fig. 4 is a schematic structural view of another view angle of the nozzle in an embodiment of the burner of the present invention;

fig. 5 is an exploded view of an intake assembly in an embodiment of the burner of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Combustion body	100a	Combustion chamber
200	Pre-heater	α	First included angle
				300	Nozzle with a nozzle body	310b	Jet outlet
310	Nozzle body	110	Side plate
				310a	Air inlet		121	Shell body
310c	Injection channel		123						Second cover plate
				120	Air inlet assembly	125	Perforated plate
122	First cover plate	120a	Air inlet cavity
				124	Mounting plate	A1	A first mixing region
B1	Second mixing region	311	Limit flange
				311a	Mounting groove

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if the present invention relates to a directional indication, the directional indication is only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture, and if the specific posture is changed, the directional indication is changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, taking "A and/or B" as an example, including either the A aspect, or the B aspect, or both A and B satisfied aspects. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a gas heater and be suitable for this gas heater's combustor, of course, this combustor still can be applicable to other water heaters or relevant equipment, for example use gas combustion to produce relevant product and equipment that high temperature hot water used such as family's shower and heating including gas hanging stove etc. below for convenient understanding to be applied to gas heater for example.

In an embodiment, the gas water heater includes a water heater main body, a heat exchanger and a burner, a heat exchange chamber and a smoke exhaust communicated with the heat exchange chamber are disposed in the water heater main body, the heat exchanger is disposed in the heat exchange chamber, referring to fig. 1 and 2, a pre-heater 200 is disposed in the burner, the pre-heater 200 is used for igniting a mixed gas and then delivering the ignited mixed gas to a combustion chamber 100a of the burner, and preheating the combustion chamber 100a to a target temperature, the burner is mounted on the water heater main body, a smoke outlet of the burner is communicated with the heat exchange chamber, and the burner injects gas and/or air into the combustion chamber 100a through a nozzle 300, so that a high-temperature air combustion reaction is performed in the combustion.

The high-temperature air combustion is mainly characterized in that: the chemical reactions mainly occur in a high-temperature low-oxygen environment, the temperature of the reactants is higher than the autoignition temperature of the reactants, the maximum temperature rise in the combustion process is lower than the autoignition temperature of the reactants, and the volume fraction of oxygen is diluted to an extremely low concentration by the combustion products. Compared with conventional combustion, in the combustion state, the pyrolysis of the fuel is inhibited, the flame thickness is thickened, the flame front surface disappears, so that the temperature of the whole hearth is very uniform, the combustion peak temperature is low, the noise is extremely low, and the pollutant NO is_xAnd the CO emission is greatly reduced. However, achieving high temperature air combustion requires certain conditions: the oxygen concentration at any position in the furnace is required to be ensured to be lower than a certain value, generally lower than 5% -10%, the fuel gas is ensured to be fully combusted and uniformly combusted, the temperature is higher than the self-ignition point of the fuel, and the self-ignition is maintained.

It should be noted that, because the pre-heater 200 ignites the combustion to the mist that contains gas and air, high temperature preheated air has been realized, rethread gas injection pipe sprays the gas and cooperates and produce the entrainment effect, make the high temperature flue gas backward flow, realize on the one hand keeping warm and make the temperature be higher than the auto-ignition point of fuel, make the gas can autoignite in combustion chamber 100a, on the other hand through efflux entrainment dilution air, make oxygen concentration be less than a definite value, realize the homogeneous combustion, so, just make to take place high temperature air combustion in the combustion chamber 100 a. That is to say, the technical scheme of this embodiment is favorable to having reached these two conditions simultaneously, realizes smoothly that high temperature air burns.

Referring to fig. 1 to 3, in an embodiment of the present invention, a burner includes a combustion main body 100, a pre-heater 200, and a plurality of nozzles 300; the combustion body 100 is formed with a combustion chamber 100 a; the preheater 200 is disposed on the combustion body 100 and is used for delivering the flue gas heated to the target temperature to the combustion chamber 100 a; the plurality of nozzles 300 are disposed through the combustion body 100 and divided into two nozzle groups disposed opposite to each other, and referring to fig. 2 and 3, the nozzles 300 have injection outlets 310b, and the injection outlets 310b of the plurality of nozzles 300 are disposed toward the pre-heater 200, so that when the plurality of nozzles 300 inject the gas flow containing the gas and/or the air into the combustion chamber 100a, the gas flows injected from the two nozzle groups meet at the gas outlet side of the pre-heater 200.

In this embodiment, the combustion body 100 of the burner produces hot water by discharging high-temperature flue gas and exchanging heat with a heat exchanger. Of course, in other embodiments, the contact heat exchange with the heat exchanger can be realized to produce hot water. The shape of the combustion body 100 of the burner may be square, cylindrical, etc., and the shape of the combustion chamber 100a may also be square or cylindrical, etc., which may be selected and designed according to actual needs and the heat exchange manner with the heat exchanger, and is not specifically limited herein.

It should be noted that a high-temperature air combustion area can be partitioned from the combustion chamber 100a, and after the gas is combusted at a high temperature in the high-temperature air combustion area, the heat generated by the combustion is discharged through a flue gas outlet to exchange heat with a heat exchanger of a gas water heater, so as to achieve the purpose of producing hot water. Due to the upward flow characteristic of the flue gas, the high-temperature air combustion area can be positioned at the upper half part of the whole combustor, and the flue gas is more favorably discharged. And in order to further improve the heat exchange efficiency between the flue gas combusted by the combustor and the heat exchanger, the upper end of the combustion main body 100 can be open to form a larger flue gas outlet, so that more flue gases exchange heat with the heat exchanger. Of course, high-temperature air combustion may be performed in the entire combustion chamber 100 a.

In this embodiment, the preheater 200 may be an electric preheater or a heat accumulating type, and in this embodiment, a gas heating type preheater is adopted, that is, high-temperature flue gas at a target temperature is obtained by mixing and combusting a certain proportion of gas and air. It can be understood that, after the pre-heater 200 is ignited, the pre-heating combustion is performed, the heating temperature is controlled, and the internal flue gas can be heated to the target temperature, so that the high-temperature pre-heating of the high-temperature air combustion area is realized. When the high-temperature air combustion area of the combustion chamber 100a is preheated to the target temperature, the nozzle 300 sprays fuel gas and/or air, the fuel gas and/or air are effectively and fully mixed with the high-temperature flue gas in the combustion chamber 100a, and the high-temperature flue gas ignites the fuel gas, so that complete and continuous high-temperature air combustion can be realized, and the generation of pollutants is reduced.

In the present embodiment, referring mainly to fig. 3, the nozzle 300 has an air inlet 310a and an injection outlet 310b, and the injection outlet 310b of the nozzle 300 communicates with the combustion chamber 100a to inject gas and/or air into the combustion chamber 100 a.

In order to realize high temperature air combustion and reduce the generation of pollutants, the nozzle 300 may be disposed obliquely so that the spraying outlet 310b faces the preheater 200, or may be disposed to be bent so that the spraying outlet 310b faces the preheater 200, and the embodiment is not limited thereto.

As shown in fig. 2 and 3, the injection outlet 310b of the nozzle 300 in the present embodiment is disposed toward the preheater 200, and the injected air flow is directed downward to form a substantially or approximately "V" or "U" shaped air flow, so that the mixing of the fuel gas and/or air and the preheated flue gas is stronger, and the mixing position is in the first mixing area a1 in fig. 2. In addition, the structural design of the embodiment also enables the preheated flue gas after combustion of the fuel gas and/or air to flow to the area near the opposite side nozzle 300, so as to further preheat the fuel gas and/or air and dilute and mix the fuel gas and/or air uniformly, the mixing position is in a second mixing area B1 in FIG. 2, the combustion products flow to the second mixing area B1 to dilute the fuel gas and/or air, high-temperature air combustion is realized, and air pollution is reduced.

It is understood that, in the present invention, by forming the combustion body 100 of the burner with the combustion chamber 100a, the pre-heater 200 is provided on the combustion body 100, and is used to deliver the flue gas heated to a target temperature to the combustion chamber 100a, a plurality of nozzles 300 are installed through the combustion body 100, and is divided into two oppositely disposed nozzle groups, the nozzles 300 having the spray outlets 310b, the spray outlets 310b of the plurality of nozzles 300 being disposed toward the pre-heater 200, so that, when a plurality of nozzles 300 inject streams containing gas and/or air into the combustion chamber 100a, the streams from the two nozzle groups meet at the air outlet side of the preheater 200, the mixing of combustion products and gas and/or air is enhanced, the mixing of the gas and/or air and preheated flue gas is also enhanced, and the problem that the emission exceeds standard due to the fact that a gas water heater cannot reach a high-temperature air combustion state under certain working conditions is solved.

Based on the above-mentioned embodiments, in order to further enhance the mixing of the combustion products of the burner with the gas and/or air and enhance the mixing of the gas and/or air with the preheated flue gas to reduce the pollutant emissions from the high temperature air combustion, in one embodiment, referring to fig. 2, the direction of the gas flow from each nozzle 300 towards the gas outlet side of the preheater 200 forms a first angle α with the horizontal plane, the first angle α opens towards the middle of the combustion chamber 100a, and the first angle α may be 0 ° to 60 °.

Referring mainly to fig. 2, in this embodiment, when the first included angle α is between 0 ° and 60 °, the air flow injected from the injection outlet 310b of the nozzle 300 and the preheated flue gas delivered by the preheater 200 meet at the air outlet side of the preheater 200, the air flow is wholly "V" shaped or "U" shaped, the combustion products in the combustion chamber 100a are more uniformly mixed with the gas and/or air, the gas and/or air is more sufficiently mixed with the preheated flue gas, and particularly when the first included angle α is 30 °, the combustion effect of the high-temperature air is better, NO is better, and NO is better_xAnd the emission of pollutants such as CO and the like is less.

To further enhance the mixing of the combustion products with the combustion gases and/or air and the mixing of the combustion gases and/or air with the preheated flue gas within the combustion chamber 100a, in one embodiment, referring primarily to FIG. 1, the combustion chamber 100a may include opposing first and second sidewalls with two nozzle sets disposed thereon, and the spacing between adjacent nozzles 300 on the first and second sidewalls may be between 0mm and 40 mm. Thus, the fuel gas can be fully combusted, and the pollutant NO is reduced_xAnd CO emission magnitude.

Further, referring primarily to FIG. 1, the orthographic projection of the plurality of nozzles 300 on the first sidewall of the combustion chamber 100a on the second sidewall may be staggered from the plurality of nozzles 300 on the second sidewall to provide more thorough mixing of the combustion products with the gas and/or air.

In one embodiment, the preheater 200 may be an atmospheric preheating burner, the preheater 200 has an outlet end for delivering flue gas to the combustion chamber 100a and an inlet end for receiving fuel gas and air, and the distance between the lowest end (the lowest end of the "V" or "U" shaped gas flow in fig. 2) where the gas flows sprayed from the two nozzle sets meet at the outlet side of the preheater 200 and the outlet end of the preheater 200 may be 20mm to 100 mm. So set up, be favorable to the mixture of gas and/or air and preheating flue gas, further reduced the pollutant discharge capacity of the high temperature air burning of this type combustor.

Furthermore, in some other embodiments, referring primarily to FIG. 2, the preheater 200 may be a fully mixed preheat combustor, which may also include a premixer for admitting and premixing fuel gas and air and delivering the mixed gas to the preheater 200; the preheater 200 ignites and heats the mixed gas to a target temperature and then delivers flue gas to the combustion chamber 100 a; the lowest end of the air streams emitted by the two nozzle sets (the lowest end of the "V" or "U" shaped air streams in fig. 2) meeting at the air outlet side of the preheater 200 may be 10mm to 40mm from the outlet end of the preheater 200. In this embodiment, when the furnace width of combustor set up to 106.5mm, its high temperature air combustion effect is better, and pollutant discharge is less. So set up, be favorable to the mixture of gas and/or air and preheating flue gas, further reduced the pollutant discharge capacity of the high temperature air burning of this type combustor. Of course, in other application scenarios, the furnace with other specifications may also be set, and is not limited herein.

In an embodiment, the present invention further provides a new nozzle 300, and it should be noted that the nozzle 300 of the present embodiment may be applied to other general burners besides the burner using the above-mentioned high-temperature air combustion, and is not limited herein.

Referring to fig. 3 and 4, in an embodiment of the present invention, the nozzle 300 includes a nozzle body 310, the nozzle body 310 having an inlet 310a, an injection outlet 310b, and an injection passage 310c communicating the inlet 310a and the injection outlet 310 b; the injection channel 310c is divided into an air inlet section and an air outlet section from the air inlet 310a to the injection outlet 310b, and the air outlet section is bent with respect to the air inlet section to change the flow direction of the air flow emitted from the air inlet section.

In this embodiment, the shape of the nozzle body 310 may be a curved tube shape, a square shape, or the like, wherein a curved injection channel 310c may be disposed in the square nozzle body 310, and the nozzle body 310 may be selected and designed according to actual requirements, and is not particularly limited herein. The nozzle body 310 may be an integrally formed structure, and may be formed with an air inlet section and an air outlet section through injection molding; of course, a split structure may also be adopted, the nozzle body 310 may be assembled by bonding or clamping two or more components together, and a sealing ring may be disposed between the components to prevent leakage of gas and/or air, and here, the specific structure of the nozzle body 310 is not limited.

It can be understood that, the nozzle 300 of the present invention is divided into an air inlet section and an air outlet section from the air inlet 310a to the injection outlet 310b by providing the air inlet 310a, the injection outlet 310b and the injection channel 310c communicating the air inlet 310a with the injection outlet 310b on the nozzle main body 310, the air outlet section is disposed in a bent manner with respect to the air inlet section to change the flow direction of the air flow ejected through the air inlet section, so that the gas and/or air injected from the nozzle 300 flows toward the preheater 200 to form a "V" or "U" shaped air flow, so that the gas and/or air is mixed with the preheated flue gas more strongly, and the mixing position is the first mixing area a1 in fig. 2. And, the preheated flue gas after combustion of the gas and/or air can be made to flow to the area near the opposite side nozzle 300, so as to further preheat the gas and/or air and dilute the gas and/or air, the mixing position is in a second mixing area B1 in FIG. 2, and the combustion products flow to the second mixing area B1 to dilute the gas and/or air, so that high-temperature air combustion is realized and air pollution is reduced.

In addition, the present invention also improves the connection components thereof adaptively according to the structure and the arrangement of the nozzle 300, and in an embodiment of the present invention, referring to fig. 1 and 2, the combustion main body 100 may include a plurality of side plates 110 and an air intake assembly 120; a plurality of side plates 110 enclose to form a rectangular parallelepiped combustion chamber 100a, and a plurality of nozzles 300 are respectively arranged on the plurality of side plates 110; the air intake assembly 120 is mounted on the side plate 110, the air intake assembly 120 is formed with an air intake chamber 120a, the air intake chamber 120a is used for connecting an external air source, and the air inlets 310a of the plurality of nozzles 300 are communicated with the air intake chamber 120 a.

Referring mainly to fig. 1 and 5, in the present embodiment, the intake assembly 120 may include a housing 121, a first cover plate 122, a second cover plate 123, and a mounting plate 124; the housing 121 may be disposed in a hollow shape and has a first opening and a second opening disposed opposite to each other; the first cover plate 122 may cover the first opening; the second cover plate 123 can cover the second opening and enclose the housing 121 and the first cover plate 122 to form an air inlet cavity 120 a; one end of the mounting plate 124 is mounted on the second cover plate 123, and the other end of the mounting plate 124 is mounted on the side plate 110 of the combustion body 100, so as to mount and fix the housing 121 on the side plate 110 of the combustion body 100; wherein the air inlet 310a of the nozzle 300 is fixedly mounted on the second cover plate 123 through the mounting plate 124 and communicates with the air inlet chamber 120a, and the injection outlet 310b of the nozzle 300 extends into the combustion chamber 100a and is disposed toward the pre-heater 200.

It will be appreciated that the nozzles 300 on the side panel 110 of the combustion chamber 100a inject the combustion gases and/or air in the intake chamber 120a of the intake assembly 120 toward the preheater 200, creating a "V" or "U" shaped flow of air within the combustion chamber 100a, facilitating the mixing of the combustion products with the combustion gases and/or air, and also the mixing of the combustion gases and/or air with the preheated flue gases.

In this embodiment, the housing 121 may have a square shape, a cylindrical shape, etc., and an air inlet port may be disposed on the housing 121 for connecting to an external air source. The first cover plate 122 and the second cover plate 123 respectively cover both sides of the intake chamber 120a of the housing 121, the first cover plate 122 may have a shape corresponding to a shape of the first opening, the second cover plate 123 may have a shape corresponding to a shape of the second opening, and the mounting plate 124 may have a shape corresponding to a shape of the second cover plate 123 and the side plate 110, which is not limited herein.

Further, referring to fig. 1 and 5, the mounting plate 124 may be elongated and provided with a plurality of first through holes spaced apart along a length direction thereof, and the plurality of nozzles 300 are mounted on the plurality of first through holes one to one. Wherein, the interval between two adjacent first through holes can be evenly arranged. So set up for a plurality of nozzles 300 set up on burning main part 100, can equalize each nozzle 300 and spout the gaseous kinetic energy of gas and/or air, make gas and/or air and preheat the flue gas intensive mixing to realize high temperature air burning.

Based on the above embodiments, referring to fig. 3 and 4, in an embodiment, the nozzle body 310 may be provided with a mounting groove 311a, and the first communicating hole of the mounting plate 124 may be provided with a first positioning protrusion for mounting and positioning with the mounting groove 311 a.

In this embodiment, referring to fig. 3 and 4, one end of the nozzle body 310 may be provided with a limiting flange 311, the mounting groove 311a is disposed on the limiting flange 311, the first connection hole on the mounting plate 124 may include a first aperture section and a second aperture section, the aperture of the first aperture section is larger than that of the second aperture section, the first positioning protrusion is disposed in the first aperture section, the limiting flange 311 is limited in the first aperture section, and the first positioning protrusion is clamped in the mounting groove 311a, so that the nozzle 300 is disposed on the side plate 110 of the combustion body 100 and the injection outlet 310b thereof extends into the combustion chamber 100 a. The second aperture section can be a through hole, and the first aperture section can be a blind hole (or a sink groove, etc.) arranged at the outer edge of the second aperture section.

In addition, referring to fig. 1 and 5, a second communication hole may be disposed at a position of the second cover plate 123 corresponding to the first communication hole of the mounting plate 124, a second positioning protrusion is protruded at a position corresponding to the mounting groove 311a in the second communication hole, and the second positioning protrusion is inserted into the mounting groove 311a, so that the nozzle 300 is mounted on the air intake assembly 120 and the air inlet 310a communicates with the air intake cavity 120 a.

In assembly, first, the injection outlet 310b of the nozzle 300 may pass through the first communication hole of the mounting plate 124, and the mounting groove 311a at the air inlet 310a of the nozzle 300 may be aligned with the first positioning protrusion of the mounting plate 124, so as to ensure that the mounting directions of all the nozzles 300 are correct; then, the second positioning protrusion of the second cover plate 123 is aligned with the mounting groove 311a of the nozzle 300 to be mounted, the mounting plate 124, the nozzle 300 and the second cover plate 123 are mounted on the housing 121 by means of screwing or clipping, and finally, the whole assembly is mounted on the side plate 110 by means of screwing or clipping, so as to complete the mounting of the air intake assembly 120.

It should be noted that, after the air intake assembly 120 is installed, since the nozzle 300 is provided with the installation recess 311a, the spray outlet 310b of the nozzle 300 may be disposed toward the pre-heater 200.

It is understood that, in the embodiment, the mounting plate 124 is provided with a first positioning protrusion to be engaged with the mounting groove 311a of the limit flange 311 of the nozzle body 310, so that the nozzle 300 is connected with the side plate 110 through the mounting plate 124 and extends into the combustion chamber 100a with the injection outlet 310b thereof being disposed toward the pre-heater 200, and the second cover plate 123 is provided with a second positioning protrusion to be engaged with the mounting groove 311a of the limit flange 311 of the nozzle body 310, so that the nozzle 300 is communicated with the intake chamber 120a through the second cover plate 123.

In order to keep the kinetic energy of the gas ejected from the nozzles 300 of each gas inlet assembly 120 as uniform as possible, in one embodiment, the gas inlet assembly 120 may further include a porous plate 125, and the porous plate 125 is disposed in the gas inlet chamber 120a for adjusting the flow direction of the gas and/or air. So set up, make the gas and/or air in the air inlet chamber 120a flow to each nozzle 300 evenly in the air inlet chamber 120a, so that the gas kinetic energy that each nozzle 300 on the same air inlet assembly 120 sprays keeps unanimous, is convenient for gas and/or air and preheats the flue gas and mixes, is favorable to the abundant burning of fuel, also is favorable to reducing CO and NO and_xand (5) discharging.

The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A burner for a gas water heater, the burner comprising:

a combustion body formed with a combustion chamber;

2. The burner of claim 1, wherein the direction of the gas flow from each of the nozzles directed toward the gas outlet side of the preheater forms a first angle with a horizontal plane, the first angle opens toward the middle of the combustion chamber, and the first angle is in the range of 0 ° to 60 °.

3. The burner of claim 1, wherein said combustion chamber includes first and second opposing sidewalls, two of said nozzle assemblies being disposed on said first and second sidewalls, and a spacing between adjacent ones of said nozzles on said first and second sidewalls is in the range of 0mm to 40 mm.

4. The burner of claim 3, wherein an orthographic projection of the plurality of nozzles on the first sidewall on the second sidewall is staggered from the plurality of nozzles on the second sidewall.

5. The burner of claim 1, wherein the preheater has an outlet end for delivering flue gas to the combustion chamber and an inlet end for receiving fuel gas and air, and the distance between the lowest end of the two sets of nozzles at the intersection of the outlet side of the preheater and the outlet end of the preheater is 20mm-100 mm.

6. The burner of claim 1, further comprising:

7. The burner of claim 1, wherein the nozzle comprises:

8. The burner of claim 7, wherein the combustion body comprises:

9. The burner of claim 8, wherein the air intake assembly comprises:

the first cover plate is arranged on the first opening in a covering mode;

10. The burner of claim 9 wherein said mounting plate is elongated and defines a plurality of first communication openings spaced along the length thereof, a plurality of said nozzles being mounted in a one-to-one relationship in said plurality of first communication openings.

11. The burner of claim 10, wherein the nozzle body is provided with a mounting groove, and the first communicating hole is internally provided with a first positioning projection which is positioned and installed with the mounting groove.

12. The burner of claim 11, wherein the nozzle body has a limiting flange at one end thereof, the mounting groove is disposed on the limiting flange, the first connecting hole includes a first aperture section and a second aperture section, the aperture of the first aperture section is larger than that of the second aperture section, the first positioning protrusion is disposed in the first aperture section, the limiting flange is limited in the first aperture section, and the first positioning protrusion is clamped in the mounting groove, so that the nozzle is inserted into the side plate of the combustion body and the injection outlet extends into the combustion chamber.

13. The burner of claim 12, wherein a second communication hole is formed in the second cover plate corresponding to the first communication hole, a second positioning protrusion is protruded in the second communication hole corresponding to the mounting groove, and the second positioning protrusion is clamped in the mounting groove, so that the nozzle is mounted on the air intake assembly and the air inlet is communicated with the air intake cavity.

14. The burner of claim 9, wherein the intake assembly further comprises a perforated plate disposed within the intake chamber for regulating a flow direction of the gas and/or air.

15. A gas water heater, comprising:

the heat exchanger is arranged in the heat exchange chamber; and

a burner as claimed in any one of claims 1 to 14, mounted on the water heater body, the flue gas outlet of the burner communicating with the heat exchange chamber; the pre-heater is arranged on a combustion main body of the combustor and used for conveying flue gas heated to a target temperature to the combustion chamber;

and gas and/or air are/is sprayed to the combustion chamber through the nozzle, so that high-temperature air combustion reaction is carried out in the combustion chamber.