Nozzles, burners and gas water heaters

Abstract

The present invention discloses a nozzle, a burner and a gas water heater, wherein the nozzle includes a nozzle body, the nozzle body has an air inlet, an injection outlet and an injection channel connecting the air inlet and 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 bent relative to the air inlet section to change the direction of the airflow ejected through the air inlet section. The present invention improves the structure of the nozzle, enhances the mixing of the gas and / or air with the preheated flue gas, greatly increases the residence time of the airflow in the combustion chamber, improves the combustion thermal efficiency and utilization rate of the gas, and solves the problem that the gas water heater cannot achieve high-temperature air combustion under some working conditions, resulting in CO and NO x The problem of excessive emissions was solved by also lowering the height and reducing the volume of the gas water heater.

Description

Technical Field

[0001] The present invention relates to the technical field of burner nozzles, and in particular to a nozzle, a burner and a gas water heater. Background Art

[0002] High Temperature Air Combustion (HTAC) is called "mild and deep low oxygen diluted combustion", or gentle combustion for short. It is a new type of combustion method, also known as high temperature air combustion. The main characteristics of this combustion are: the chemical reaction mainly occurs in a high temperature and low oxygen environment, the reactant temperature is higher than its auto-ignition temperature, and the maximum temperature rise during the combustion process is lower than its auto-ignition temperature. The oxygen volume fraction is diluted by the combustion products to an extremely low concentration, usually 3% to 10%. Compared with conventional combustion, in this combustion state, the pyrolysis of the fuel is suppressed, the flame thickness becomes thicker, and the flame front disappears, so that the temperature of the entire furnace is very uniform during this combustion, and the pollutant NO x and CO emissions are significantly reduced.

[0003] Although high-temperature air combustion has many advantages as mentioned above, its application in gas water heaters is currently in the exploratory stage, and is usually implemented using the existing structure of gas water heaters. For example, the gas is directly sprayed into the furnace by applying the existing burner nozzle. The existing burner nozzle is mainly implemented by fire grate and metal fiber mesh (or porous ceramic plate). After application, the uniformity of the mixing of the sprayed gas and / or air flow with the flue gas in the furnace is poor, resulting in uneven combustion in the furnace. Summary of the invention

[0004] The main purpose of the present invention is to provide a nozzle, which is intended to enhance the mixing of fuel gas and / or air with preheated flue gas to achieve high-temperature air combustion.

[0005] To achieve the above object, the present invention provides a nozzle for a burner, the nozzle comprising:

[0006] A nozzle body, wherein the nozzle body has an air inlet, an injection outlet, and an injection channel connecting the air inlet and the injection outlet;

[0007] 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 bent relative to the air inlet section to change the flow direction of the airflow ejected through the air inlet section.

[0008] In one embodiment, an angle is formed between the axis of the air inlet section and the axis of the air outlet section, the angle opening is facing away from the air inlet, and the angle is 10°-80°, so that the air outlet section is bent relative to the air inlet section.

[0009] In one embodiment, the connection between the air inlet section and the air outlet section is in an arc transition.

[0010] In one embodiment, the burner has a positioning protrusion, and the nozzle body is provided with a mounting groove for mounting and positioning with the positioning protrusion of the burner.

[0011] In one embodiment, the nozzle body is tubular, and a limiting flange is provided at one end corresponding to the air inlet, and the mounting groove is provided on the limiting flange.

[0012] In one embodiment, there are multiple installation grooves, and at least two of the installation grooves are symmetrically arranged with a center line of a radial cross section of the nozzle body as an axis.

[0013] In order to achieve the above object, the present invention further provides a burner for a gas water heater, the burner comprising:

[0014] a combustion body having a combustion chamber formed therein; and

[0015] A plurality of nozzles, wherein the nozzles are the nozzles as described above, the plurality of nozzles are arranged on the combustion body, and are arranged along the first circumferential direction of the combustion chamber, the injection outlets of the plurality of nozzles are located in the combustion chamber, and the plurality of nozzles are used to inject gas and / or air into the combustion chamber, and form a swirl flow along the first circumferential direction in the combustion chamber; wherein the nozzles include:

[0016] A nozzle body, wherein the nozzle body has an air inlet, an injection outlet, and an injection channel connecting the air inlet and the injection outlet;

[0017] 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 bent relative to the air inlet section to change the flow direction of the airflow ejected through the air inlet section.

[0018] In one embodiment, the combustion body comprises:

[0019] A plurality of side plates, wherein the plurality of side plates enclose a combustion chamber in a rectangular parallelepiped shape, and the plurality of nozzles are disposed on the plurality of side plates;

[0020] The kinetic energy of the gas ejected by the nozzles located on the two opposite side plates of the combustion chamber is equal, and the kinetic energy ratio of the gas ejected by the nozzles located on the two adjacent side plates of the combustion chamber is 0.4-2.5.

[0021] In one embodiment, the combustion body further comprises:

[0022] An air intake assembly is installed on the side plate. The air intake assembly is formed with an air intake cavity. The air intake cavity is used to connect to an external air source. The air intake ports of the plurality of nozzles are connected to the air intake cavity.

[0023] In one embodiment, the air intake assembly comprises:

[0024] The housing is hollow and has a first opening and a second opening that are oppositely disposed;

[0025] A first cover plate, covering the first opening;

[0026] A second cover plate, which covers the second opening and is enclosed by the housing and the first cover plate to form the air inlet cavity; and

[0027] A mounting plate, one end of which is mounted on the second cover plate, and the other end of which is mounted on the side plate of the combustion body, so as to fix the shell to the side plate of the combustion body; wherein the air inlet of the nozzle is fixed to the second cover plate through the mounting plate and is connected to the air inlet cavity, and the injection outlet of the nozzle extends into the combustion chamber.

[0028] In one embodiment, the mounting plate is in the shape of an elongated strip and is provided with a plurality of first communication holes arranged at intervals along its length direction, and the plurality of nozzles are mounted one-to-one on the plurality of first communication holes.

[0029] In one embodiment, when a mounting groove is provided on the nozzle body, a first positioning protrusion which is mounted and positioned with the mounting groove is provided in the first communicating hole.

[0030] In one embodiment, when the mounting groove is provided on the limiting flange of the nozzle body, the first connecting hole includes a first aperture section and a second aperture section, the aperture of the first aperture section is larger than the aperture of the second aperture section, the first positioning protrusion is provided in the first aperture section, the limiting flange is limited in the first aperture section and the first positioning protrusion is inserted into the mounting groove, so that the nozzle is passed through the side plate of the combustion body and the injection outlet extends into the combustion chamber.

[0031] In one embodiment, a second connecting hole is provided at a position of the second cover plate corresponding to the first connecting hole, and a matching second positioning protrusion is provided in the second connecting hole corresponding to the position of the mounting groove, and the second positioning protrusion is inserted into the mounting groove so that the nozzle is installed on the air intake assembly and the air inlet is connected with the air intake cavity.

[0032] In one embodiment, the air intake assembly further comprises a porous plate, and the porous plate is arranged in the air intake cavity to adjust the flow direction of the gas and / or air.

[0033] In order to achieve the above object, the present invention further provides a gas water heater, the gas water heater comprising:

[0034] A main body, wherein a heat exchange chamber and a smoke exhaust port communicated with the heat exchange chamber are arranged in the main body;

[0035] A heat exchanger is disposed in the heat exchange chamber;

[0036] a preheater, mounted on the main body, for igniting the mixed gas and transporting it to the combustion chamber of the burner, and preheating the combustion chamber to a target temperature; and

[0037] A burner, wherein the burner is the burner as described above, the burner is mounted on the main body, and the smoke outlet of the burner is connected to the heat exchange chamber;

[0038] Wherein, fuel gas and / or air is sprayed into the combustion chamber through the nozzle, so that a high-temperature air combustion reaction occurs in the combustion chamber.

[0039] In the technical solution of the present invention, since the nozzle includes a nozzle body, the nozzle body has an air inlet, an injection outlet and an injection channel connecting the air inlet and 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 bent relative to the air inlet section to change the direction of the air flow ejected through the air inlet section, so that the gas and / or air injected by the nozzle forms a clockwise or counterclockwise swirl in the combustion chamber of the burner, thereby enhancing the mixing of the gas and / or air with the preheated flue gas in the combustion chamber, and enhancing the mixing of the high-temperature flue gas and the gas and / or air after the high-temperature air combustion, thereby promoting the realization of high-temperature air combustion. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0041] Figure 1 It is a structural schematic diagram of an embodiment of a burner of the present invention;

[0042] Figure 2 An exploded view of an air intake assembly in one embodiment of a burner of the present invention;

[0043] Figure 3 It is a structural schematic diagram of an embodiment of a nozzle of the present invention;

[0044] Figure 4A schematic structural diagram of the nozzle of the present invention from another perspective;

[0045] Figure 5 The simulation result of the airflow trajectory in the combustion chamber of the burner in one embodiment of the present invention;

[0046] Figure 6 It is a structural schematic diagram of a mounting plate in one embodiment of a burner of the present invention;

[0047] Figure 7 for Figure 6 A magnified view of the part A in the middle;

[0048] Figure 8 This is a schematic structural diagram of a second cover plate in an embodiment of a burner of the present invention;

[0049] Fig. 9 for Figure 8 Enlarged view of part B in the middle.

[0050] Description of Figure Numbers:

[0051] Label name Label name 10 nozzle 100a Air Inlet 100 Nozzle body 100b Jet outlet 111 Mounting groove 100c Jet channel 200 Combustion body 110 Limit flange 220 Air intake components 200a Combustion Chamber 221 case 210 Side panels 223 Second cover 220a Intake cavity 224a First communication hole 222 First cover 241 The first aperture section 224 Mounting Plate 225 Multi-hole plate 2241 First positioning protrusion 2231 Second positioning protrusion 242 Second aperture section 223a Second communication hole

[0052] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0055] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0056] The present invention proposes a gas water heater and a burner suitable for the gas water heater. Of course, the burner can also be applied to other water heaters or related equipment, such as gas wall-mounted boilers and other related products and equipment that use gas combustion to generate high-temperature hot water for family bathing and heating, etc. For ease of understanding, the following application to a gas water heater is taken as an example.

[0057] In one embodiment, the gas water heater includes a main body, a heat exchanger, a preheater and a burner. The main body is provided with a heat exchange chamber and a smoke exhaust port connected to the heat exchange chamber. The heat exchanger is arranged in the heat exchange chamber. The preheater is installed on the main body. Figure 1 The preheater is used to ignite the mixed gas and transport it to the combustion chamber 200a of the burner, and preheat the combustion chamber 200a to the target temperature. The burner is installed on the main body, and the smoke outlet of the burner is connected to the heat exchange chamber. The burner sprays gas and / or air into the combustion chamber 200a through the nozzle 10, so that a high-temperature air combustion reaction occurs in the combustion chamber 200a.

[0058] The main characteristics of high-temperature air combustion are: chemical reactions mainly occur in a high-temperature, low-oxygen environment, the reactant temperature is higher than its auto-ignition temperature, and the maximum temperature rise during the combustion process is lower than its auto-ignition temperature, and the oxygen volume fraction is diluted to an extremely low concentration by the combustion products. Compared with conventional combustion, in this combustion state, the pyrolysis of the fuel is suppressed, the flame thickness becomes thicker, and the flame front disappears, so that the temperature in the entire furnace is very uniform, the peak combustion temperature is low, the noise is extremely low, and the pollutant NO is very small. x And CO emissions are greatly reduced. However, achieving high-temperature air combustion requires certain conditions: it is necessary to ensure that the oxygen concentration at any position in the furnace is lower than a certain value, generally lower than 5% to 10%, to ensure that the gas is fully decomposed and burned evenly, and the temperature must be higher than the auto-ignition point of the fuel to maintain auto-ignition.

[0059] It should be noted that, since the preheater ignites and burns the mixed gas containing gas and air, high-temperature preheated air is achieved, and then the gas is sprayed through the gas injection pipe to cooperate to produce the entrainment effect, so that the high-temperature flue gas refluxes, on the one hand, it achieves heat preservation so that the temperature is higher than the auto-ignition point of the fuel, so that the gas in the combustion chamber can self-ignite, and on the other hand, the air is diluted by jet entrainment, so that the oxygen concentration is lower than a certain value, and uniform combustion is achieved, so that high-temperature air combustion occurs in the combustion chamber. In other words, the technical solution of this embodiment is conducive to achieving these two conditions at the same time, and smoothly realizing high-temperature air combustion.

[0060] Reference Figure 1 and Figure 2 In one embodiment, the burner proposed by the present invention includes a combustion body 200 and a plurality of nozzles 10. A combustion chamber 200a is formed in the combustion body 200. The plurality of nozzles 10 are arranged on the combustion body 200 and are arranged along the first circumference of the combustion chamber 200a. The injection outlets 100b of the plurality of nozzles 10 are located in the combustion chamber 200a. The plurality of nozzles 10 are used to inject gas and / or air into the combustion chamber 200a and form a swirl flow along the first circumference in the combustion chamber 200a. It should be noted that the plurality of nozzles 10 can be installed at an angle in the combustion chamber 200a. Of course, the nozzles 10 themselves can also be improved to achieve swirl flow.

[0061] In one embodiment, the present invention further proposes a new nozzle 10. It should be noted that the nozzle 10 of this embodiment is applicable to not only the above-mentioned high-temperature air combustion burner, but also other common burners, which is not limited here.

[0062] Reference Figure 3 and Figure 4 In one embodiment of the present invention, the nozzle 10 includes a nozzle body 100, and the nozzle body 100 has an air inlet 100a, an injection outlet 100b and an injection channel 100c connecting the air inlet 100a and the injection outlet 100b; the injection channel 100c is divided into an air inlet section and an air outlet section from the air inlet 100a to the injection outlet 100b, and the air outlet section is bent relative to the air inlet section to change the direction of the airflow ejected through the air inlet section.

[0063] In this embodiment, the shape of the nozzle body 100 can be a curved tube or square, etc., wherein a curved injection channel 100c can be provided in the square nozzle body 100, and the nozzle body 100 can be selected and designed according to actual needs, and no specific limitation is made here. The nozzle body 100 can be an integrally formed structure, and the air inlet section and the air outlet section can be formed by injection molding; of course, a split structure can also be adopted, and the nozzle body 100 can be assembled together by bonding or clamping two or more parts, and sealing rings can be provided between the parts to prevent leakage of gas and / or air, and the specific structure of the nozzle body 100 is not limited here.

[0064] It can be understood that the nozzle 10 of the present invention is provided with an air inlet 100a, an injection outlet 100b and an injection channel 100c connecting the air inlet 100a and the injection outlet 100b on the nozzle body 100, and the injection channel 100c is divided into an air inlet section and an air outlet section from the air inlet 100a to the injection outlet 100b, and the air outlet section is bent relative to the air inlet section to change the direction of the air flow ejected through the air inlet section, so that the gas and / or air injected by the nozzle 10 forms a clockwise or counterclockwise airflow in the combustion chamber 200a of the burner, thereby enhancing the mixing of the gas and / or air with the preheated flue gas in the combustion chamber 200a, and enhancing the mixing of the high-temperature flue gas with the gas and / or air after the high-temperature air combustion, thereby promoting the realization of high-temperature air combustion.

[0065] Main references Figure 3 In order to achieve a better high-temperature air combustion effect, in one embodiment, an angle α is formed between the axis of the air inlet section and the axis of the air outlet section of the nozzle body 100. The angle α opens away from the air inlet 100a. The angle α can be 10°-80°, so that the air outlet section is bent relative to the air inlet section. With such a configuration, the gas and / or air injected by the nozzle 10 to the combustion chamber 200a can flow along one side. When multiple nozzles 10 are arranged in the combustion chamber, the gas and / or air injected by this type of nozzle 10 stays in the combustion chamber 200a for a longer time, and the mixing of the gas and / or air with the preheated flue gas in the combustion chamber 200a is enhanced. At the same time, the mixing of the high-temperature flue gas and the gas and / or air after the high-temperature air combustion can also be enhanced, thereby greatly improving the high-temperature air combustion effect.

[0066] In one embodiment, the connection between the air inlet section and the air outlet section of the nozzle body 100 can be in the form of an arc transition, so that the gas and / or air can flow more smoothly in the injection channel 100c to guide the injection direction of the gas and / or air. At the same time, this smooth transition design makes the nozzle 10 easy to process and makes the airflow ejection smoother.

[0067] In order to install and fix the nozzle 10 on the burner, in one embodiment, refer to Figure 4The burner has a positioning protrusion, and the nozzle body 100 is provided with a mounting groove 111 for mounting and positioning with the positioning protrusion of the burner.

[0068] In this embodiment, the nozzle body 100 may be tubular, and a limiting flange 110 may be provided at one end corresponding to the air inlet 100 a , and the mounting groove 111 may be provided on the limiting flange 110 .

[0069] Furthermore, there are multiple mounting grooves 111, and at least two mounting grooves 111 are symmetrically arranged with a central line of a radial cross section of the nozzle body 100 as an axis. Such arrangement facilitates the limited installation of the nozzle 10 on the burner, so that its injection outlet 100b faces a preset position, so that the gas and / or air injected by the multiple nozzles 10 form an airflow flowing in a clockwise or counterclockwise direction in the combustion chamber 200a of the burner, thereby strengthening the mixing of the gas and / or air with the preheated flue gas in the combustion chamber 200a, and realizing high-temperature air combustion.

[0070] Based on the above embodiment, a burner using the above nozzle 10 will be described in detail below.

[0071] refer to Figure 1 The shape of the combustion body 200 of the burner used in the above-mentioned nozzle 10 can be square, cylindrical, etc., and can be selected and designed according to actual needs, and no specific limitation is made here.

[0072] It should also be noted that a high-temperature air combustion zone can be divided in the combustion chamber 200a. When the gas burns at high temperature in the high-temperature air combustion zone, the heat after combustion is discharged through the flue gas outlet, and heat can be exchanged with the heat exchanger of the gas water heater to produce hot water. Due to the upward flow of flue gas, the high-temperature air combustion zone can also be located in the upper half of the entire burner, which is more conducive to the discharge of flue gas. In order to further increase the flue gas discharge rate, the upper end of the combustion body 200 is opened to form a flue gas outlet. Of course, high-temperature air combustion can also be carried out in the entire combustion chamber 200a. The injection outlet 100b of the nozzle 10 is connected to the combustion chamber 200a to inject gas and / or air into the combustion chamber 200a.

[0073] In addition, a preheater and an ignition device may be provided in the combustion chamber 200a. The ignition device ignites and burns the preheater to achieve preheating combustion of the combustion chamber 200a. The temperature in the combustion chamber 200a may be heated to a target temperature to control the heating temperature. In this way, high-temperature preheating of the high-temperature air combustion zone is achieved. When the high-temperature air combustion zone of the combustion chamber 200a is preheated to the target temperature, the nozzle 10 sprays the gas and / or air to effectively and fully mix with the high-temperature flue gas in the combustion chamber 200a. The high-temperature flue gas ignites the gas, which can achieve complete and continuous high-temperature air combustion and reduce the generation of pollutants.

[0074] It can be understood that the burner of the present invention is achieved by inserting multiple nozzles 10 on the combustion body 200 and arranging them along the first circumferential direction of the combustion chamber 200a. The injection outlets 100b of the multiple nozzles 10 are located in the combustion chamber 200a. The multiple nozzles 10 are used to inject gas and / or air into the combustion chamber 200a, and form a vortex flowing along the first circumferential direction in the combustion chamber 200a, so that the airflow ejected from the nozzle 10 flows in the combustion chamber 200a in a clockwise or counterclockwise direction, thereby enhancing the mixing of the gas and / or air with the preheated flue gas below, and also enhancing the mixing of the high-temperature flue gas with the gas and / or air after the high-temperature air combustion, thereby promoting the realization of high-temperature air combustion.

[0075] refer to Figure 1 In order to enhance the mixing of the fuel gas and / or air sprayed by the nozzle 10 and the preheated flue gas, the residence time of the gas in the combustion chamber 200a is increased to ensure sufficient combustion of the fuel. In one embodiment, the combustion body 200 includes a plurality of side plates 210, which enclose a combustion chamber 200a in a rectangular shape, and a plurality of nozzles 10 are arranged on the plurality of side plates 210; wherein, the kinetic energy of the gas sprayed by the nozzles 10 located on the two side plates 210 opposite to each other in the combustion chamber 200a is equal, and the kinetic energy ratio of the gas sprayed by the nozzles 10 located on the two adjacent side plates 210 of the combustion chamber 200a is 0.4-2.5.

[0076] like Figure 5 As shown, Figure 5 The simulation result of the airflow trajectory in the combustion chamber of the burner in the embodiment of the present invention is shown. By counting the gas trajectory lines, it can be found that when 50% of the gas trajectory lines flow out of the smoke pipe, compared with spraying the mixed gas vertically (when the angle α is 0°) from the four sides of the combustion chamber 200a into the combustion chamber 200a, the nozzle injection method of this embodiment increases the residence time of the gas in the combustion chamber 200a by 2.14 times, which is conducive to the combustion of the fuel, thereby reducing the height of the burner, and also helps to reduce CO and NO x Emissions can also reduce the noise generated by burner combustion.

[0077] Main references Figure 1 and Figure 2 In one embodiment, the combustion body 200 further includes an air intake assembly 220, which is mounted on the side plate 210. The air intake assembly 220 forms an air intake cavity 200a, which is used to connect to an external gas source, and the air intake ports 100a of the plurality of nozzles 10 are connected to the air intake cavity 200a. In this embodiment, only one set of air intake assemblies 220 is required to be arranged on the side plate 210 on each side of the combustion chamber 200a to connect the plurality of nozzles 10 thereon, and it is not necessary to arrange a plurality of air intake pipes to be installed one-to-one with the plurality of nozzles 10, so that the nozzles 10 can be connected to gas and / or air.

[0078] In order to install the air intake assembly 220 and the nozzle 10 on the side plate 210 of the combustion body 200 so that the nozzle 10 receives the gas and / or air and sprays it into the combustion chamber 200a, in one embodiment, mainly referring to Figure 2 The air intake assembly 220 may include a housing 221, a first cover plate 222, a second cover plate 223 and a mounting plate 224. The housing 221 is hollow and has a first opening and a second opening that are oppositely arranged. The first cover plate 222 is covered on the first opening, and the second cover plate 223 is covered on the second opening and enclosed with the housing 221 and the first cover plate 222 to form an air intake cavity 200a. One end of the mounting plate 224 is mounted on the second cover plate 223, and the other end of the mounting plate 224 is mounted on the side plate 210 of the combustion body 200, so as to mount and fix the housing 221 on the side plate 210 of the combustion body 200. Among them, the air intake port 100a of the nozzle 10 is fixedly mounted on the second cover plate 223 through the mounting plate 224 and communicates with the air intake cavity 200a, and the jet outlet 100b of the nozzle 10 extends into the combustion chamber 200a.

[0079] In this embodiment, the housing 221 may be in a square, cylindrical or other shape, and an air inlet interface may be provided on the housing 221 to access an external air source. The first cover plate 222 and the second cover plate 223 cover both sides of the air inlet cavity 200a of the housing 221, respectively. The shape of the first cover plate 222 may be adapted to the shape of the first opening, the shape of the second cover plate 223 may be adapted to the shape of the second opening, and the shape of the mounting plate 224 may be adapted to the shape of the second cover plate 223 and the side plate 210, which is not limited here.

[0080] Furthermore, combined with Figure 2 and Figure 6The mounting plate 224 may be in the shape of a long strip and may be provided with a plurality of first connecting holes 224a arranged at intervals along its length direction, and a plurality of nozzles 10 may be installed one-to-one on the plurality of first connecting holes 224a. The intervals between two adjacent first connecting holes 224a may be evenly arranged. In this way, the plurality of nozzles 10 are arranged on the combustion body 200, and the gas kinetic energy of the gas and / or air sprayed by each nozzle 10 may be balanced, so that the gas and / or air are fully mixed with the preheated flue gas to achieve high-temperature air combustion.

[0081] Based on the above embodiments, combined with Figure 3 and Figure 7 When the nozzle body 100 is provided with a mounting groove 111, the first connecting hole 224a has a first positioning protrusion 2241 installed and positioned with the mounting groove 111. When the mounting groove 111 is provided on the limiting flange 110 of the nozzle body 100, the first connecting hole 224a includes a first aperture section 241 and a second aperture section 242, the aperture of the first aperture section 241 is larger than the aperture of the second aperture section 242, the first positioning protrusion 2241 is provided in the first aperture section 241, the limiting flange 110 is limited in the first aperture section 241 and the first positioning protrusion 2241 is inserted into the mounting groove 111, so that the nozzle 10 is installed on the side plate 210 of the combustion body 200 and the injection outlet 100b extends into the combustion chamber 200a. Among them, the second aperture section 242 can be a through hole, and the first aperture section 241 can be a blind hole (or a sink, etc.) at the outer edge of the second aperture section 242.

[0082] In addition, reference Figure 8 and Fig. 9 A second connecting hole 223a can be set at the position of the second cover plate 223 corresponding to the first connecting hole 224a, and a matching second positioning protrusion 2231 is protruded in the second connecting hole 223a at the position corresponding to the mounting groove 111. The second positioning protrusion 2231 is inserted into the mounting groove 111, so that the nozzle 10 is installed on the air intake assembly 220 and the air inlet 100a is connected with the air intake cavity 200a.

[0083] During assembly, first, the injection outlet 100b of the nozzle 10 can be passed through the first connecting hole 224a of the mounting plate 224, and the mounting groove 111 at the air inlet 100a of the nozzle 10 is aligned with the first positioning protrusion 2241 of the mounting plate 224 to ensure that all nozzles 10 are installed in the correct direction; then, the second positioning protrusion 2231 of the second cover plate 223 is aligned with the mounting groove 111 of the nozzle 10 for installation, and the mounting plate 224, the nozzle 10 and the second cover plate 223 can be installed on the shell 221 by means of screw connection or snap connection, and finally, the entire assembly can be installed together on the side plate 210 by means of screw connection or snap connection to complete the installation of the air intake assembly 200.

[0084] It should be noted that after the air intake assembly 200 is installed, since the nozzle 10 is provided with the installation groove 111, the included angle α between the cross section of the injection outlet 100b of the nozzle 10 and the side plate 210 can be kept unchanged at 10°-80°. Among them, when the included angle α is 60°, the mixed gas injected by the nozzle 10 in the combustion chamber 200a and the preheated flue gas have a better mixing effect, and the high-temperature air combustion effect is better.

[0085] It can be understood that, in the embodiment, the mounting plate 224 is engaged with the mounting groove 111 on the limiting flange 110 of the nozzle body 100 by setting the first positioning protrusion 2241, so that the nozzle 10 is connected to the side plate 210 through the mounting plate 224 and extends into the combustion chamber 200a; the second cover plate 223 is engaged with the mounting groove 111 on the limiting flange 110 of the nozzle body 100 by setting the second positioning protrusion 2231, so that the nozzle 10 is connected to the air intake chamber 200a through the second cover plate 223.

[0086] refer to Figure 1 and Figure 2 In order to keep the kinetic energy of the gas ejected from the nozzle 10 on each air intake assembly 220 as balanced as possible, in one embodiment, the air intake assembly 220 further includes a porous plate 225, which is arranged in the air intake chamber 200a to adjust the flow direction of the gas and / or air. This arrangement allows the gas and / or air in the air intake chamber 200a to flow evenly to each nozzle 10 in the air intake chamber 200a, so that the kinetic energy of the gas ejected from each nozzle 10 on the same air intake assembly 200 is consistent, which facilitates the mixing of the gas and / or air with the preheated flue gas, is beneficial to the full combustion of the fuel, and is also beneficial to the reduction of CO and NO x emission.

[0087] Since the above-mentioned nozzle is used in the burner of the present invention, the embodiments of the burner of the present invention include all the technical solutions of all the above-mentioned nozzle embodiments, and the technical effects achieved are also exactly the same, which will not be repeated here. Similarly, since the above-mentioned burner is used in the gas water heater of the present invention, the embodiments of the gas water heater of the present invention include all the technical solutions of all the above-mentioned burner embodiments, and the technical effects achieved are also exactly the same, which will not be repeated here.

[0088] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A burner, characterized in that: The burner comprises: a combustion body having a combustion chamber formed therein; and A plurality of nozzles, the plurality of nozzles are arranged on the combustion body and are arranged along the first circumferential direction of the combustion chamber, the injection outlets of the plurality of nozzles are located in the combustion chamber, the plurality of nozzles are used to inject gas and / or air into the combustion chamber, and form a swirl flow along the first circumferential direction in the combustion chamber; the nozzles include: A nozzle body, wherein the nozzle body has an air inlet, an injection outlet, and an injection channel connecting the air inlet and the injection outlet; The jet channel is divided into an air inlet section and an air outlet section from the air inlet to the jet outlet, and the air outlet section is bent relative to the air inlet section to change the flow direction of the airflow ejected through the air inlet section; The combustion body includes a plurality of side plates, the plurality of side plates enclose a combustion chamber in a rectangular shape, and the plurality of nozzles are disposed on the plurality of side plates; The combustion body further includes an air intake assembly mounted on the side plate, wherein the air intake assembly is formed with an air intake cavity, wherein the air intake cavity is used to access an external air source, and the air intake ports of the plurality of nozzles are connected to the air intake cavity; the air intake assembly includes: The housing is hollow and has a first opening and a second opening that are oppositely disposed; A first cover plate, covering the first opening; and A second cover plate is disposed on the second opening and is enclosed with the shell and the first cover plate to form the air inlet cavity.

2. The burner according to claim 1, characterized in that An angle is formed between the axis of the air inlet section and the axis of the air outlet section, the angle opening is facing away from the air inlet, and the angle is 10°-80°, so that the air outlet section is bent relative to the air inlet section.

3. The burner according to claim 2, characterized in that The connection between the air inlet section and the air outlet section is in an arc transition.

4. The burner according to claim 1, characterized in that The burner has a positioning protrusion, and the nozzle body is provided with a mounting groove for mounting and positioning with the positioning protrusion of the burner.

5. The burner according to claim 4, characterized in that The nozzle body is tubular, and a limiting flange is arranged at one end corresponding to the air inlet, and the mounting groove is arranged on the limiting flange.

6. The burner according to claim 5, characterized in that There are multiple installation grooves, and at least two of the installation grooves are symmetrically arranged with a center line of a radial cross section of the nozzle body as an axis.

7. The burner according to any one of claims 1 to 6, characterized in that: The kinetic energy of the gas sprayed by the nozzles located on the two opposite side plates of the combustion chamber is equal, and the kinetic energy ratio of the gas sprayed by the nozzles located on the two adjacent side plates of the combustion chamber is 0.4-2.

5.

8. The burner according to claim 1, characterized in that The air intake assembly comprises: A mounting plate, one end of which is mounted on the second cover plate, and the other end of which is mounted on the side plate of the combustion body, so as to fix the shell to the side plate of the combustion body; wherein the air inlet of the nozzle is fixed to the second cover plate through the mounting plate and is connected to the air inlet cavity, and the injection outlet of the nozzle extends into the combustion chamber.

9. The burner according to claim 8, characterized in that The mounting plate is in the shape of an elongated strip and is provided with a plurality of first communicating holes arranged at intervals along its length direction. The plurality of nozzles are mounted one-to-one on the plurality of first communicating holes.

10. The burner according to claim 9, characterized in that When a mounting groove is provided on the nozzle body, a first positioning protrusion which is mounted and positioned with the mounting groove is provided in the first communicating hole.

11. The burner according to claim 10, characterized in that When the mounting groove is arranged on the limiting flange of the nozzle body, the first connecting hole includes a first aperture section and a second aperture section, the aperture of the first aperture section is larger than the aperture 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 inserted into the mounting groove, so that the nozzle is passed through the side plate of the combustion body and the injection outlet extends into the combustion chamber.

12. The burner according to claim 11, characterized in that The second cover plate is provided with a second connecting hole at a position corresponding to the first connecting hole, and a matching second positioning protrusion is protruded in the second connecting hole at a position corresponding to the mounting groove, and the second positioning protrusion is inserted into the mounting groove so that the nozzle is installed on the air intake assembly and the air inlet is connected with the air intake cavity.

13. The burner according to claim 1, characterized in that The air intake assembly further comprises a porous plate, which is arranged in the air intake cavity to adjust the flow direction of the gas and / or air.

14. A gas water heater, characterized in that: The gas water heater comprises: A main body, wherein a heat exchange chamber and a smoke exhaust port communicated with the heat exchange chamber are arranged in the main body; A heat exchanger is disposed in the heat exchange chamber; a preheater, mounted on the main body, for preheating the gas to a target temperature before delivering it to the combustion chamber; and A burner, wherein the burner is a burner according to any one of claims 1 to 13, the burner is mounted on the main body, and the flue gas outlet of the burner is connected to the heat exchange chamber; Wherein, fuel gas and / or air is sprayed into the combustion chamber through the nozzle, so that a high-temperature air combustion reaction occurs in the combustion chamber.

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