EP3974743B1

EP3974743B1 - Burner and water heating apparatus

Info

Publication number: EP3974743B1
Application number: EP19926687.5A
Authority: EP
Inventors: Jianxiong Xiao; Wenfeng Chen
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: 2019-04-25
Filing date: 2019-12-19
Publication date: 2024-08-21
Anticipated expiration: 2039-12-19
Also published as: EP3974743A4; EP3974743A1; ES2989707T3; WO2020215762A1

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese patent applications No. 201910337759.1 , 201920580733.5 , 201910337770.8 , and 201920580690.0, filed on April 25, 2019 by Wuhu Midea Kitchen & Bath Appliance Mfg. Co., Ltd. and Midea Group Co., Ltd

FIELD

The present invention relates to the technical field of burners, and more particularly, to a housing for a burner, a burner, and a water heating apparatus.

BACKGROUND

Nowadays, countries all over the world have set increasingly stricter requirements on environmental protection, especially in Europe region. In the industry of water heating apparatus, laws and standards have been specified to regulate and limit the exhaust gas emissions of the water heating apparatuses. In order to achieve low nitrogen emissions and economical cost requirements, water-cooled burning technology has quietly emerged in the market. As the water-cooled burner is an atmospheric natural mixing burner, structures of the conventional atmospheric natural mixing burner have been used in the related art, including an open structure and a structure that is simply connected by a pull rod.
Such structure have the following disadvantages: unable to improve burning intensity; too many burning single pieces; necessarily designing all parts to be large, resulting in huge volume and high manufacturing cost; poor burning performance; reduced nitrogen oxides after the mixed air is increased; and poor stability of flame, likely to flame-out, difficult to ignite, and difficult to spread fire.
JP 2000 171010 A discloses that a combustion device is constituted so that a burner is provided in a combustion chamber case and a burner case is arranged around the outer periphery of the combustion chamber case while a tubular air flow passage, provided across the whole periphery of inside of the burner case, is formed between the burner case and the combustion chamber case, and an air supplying means is communicated with the air flow passage so as to pass cooling air through the inside of the air flow passage. A lower space communicating with the lightening flame port is formed in the lightening mixing chamber, and the air-fuel mixture is discharged from the plurality of jet ports formed in the lightening gas communication passage in the light mixing chamber. A light air introduction port formed below the light mixing chamber is connected to the fan via the air chamber.
CN 108 534 139 A discloses a burner and a water heater. The burner comprises a plurality of fire distributors, each fire distributor is provided with at least three ejector pipes, and the multiple fire distributors are arranged in parallel. Fastening pieces penetrate through the multiple fire distributors and connect the multiple distributors into a fire row. Pressing parts are arranged at the extension ends, relative to the fire row, of the fastening pieces, and the pressing parts press against the fire row. In one example, the ejector tube includes a first ejector tube a second ejector tube, and a third ejector tube. The gas separation device may include a first gas passage, a second gas passage, and a third gas passage. The first gas passage communicates with the first ejector tube corresponding to its position through the first nozzle; the second gas passage communicates with the second ejector tube corresponding to its position through the second nozzle; the third gas passage passes The third nozzle is in communication with the third ejector tube corresponding to its position.
CN 205 878 626 U discloses a combustion chamber subassembly and gas heater, wherein, the combustion chamber subassembly includes the combustor and is used for the holding combustor and opening combustion chamber up. The foot on the bottom wall of the combustion chamber, and the support is provided with a first air inlet hole. The first air inlet hole communicates with the air injection pipe assembly as an auxiliary air inlet. Preferably, the aperture of the first air inlet hole is smaller than the aperture of the third air inlet hole. The bottom air intake is realized by providing the first air intake hole on the basis of the intake air on the side of the third air inlet.
It is the object of the present invention to provide an improved burner and an improved heating apparatus comprising said burner.
This object is achieved by the subject-matter of the independent claims.
Embodiments are defined by the dependent claims.

SUMMARY

The present aims to solve at least one of the technical problems existing in the prior art. In this regard, an object of the present disclosure is to provide a burner and reducing the volume of the burner.
The present invention provides a burner.
The present invention provides a water heating apparatus having the above-mentioned burner.
A burner according to the present invention comprising a side enclosing plate and an air distribution plate is provided. An installation space penetrating in an up-down direction is enclosed and defined by the side enclosing plate, and a burner unit of the burner is installed in the installation space. The air distribution plate is disposed at and sealing a lower end opening of the installation space and located above the burner unit. A first air inlet and a second air inlet, for air inflow, are defined in the air distribution plate and spaced apart from each other. The first air inlet is in communication with an internal gas channel in the burner unit, and the second air inlet is in communication with an external gas channel located at a side portion of the burner unit.
The burner according to the example of the present disclosure can advantageously improve the burning performance of the burner and reduce the volume of the burner.
In addition, the burner according to the above-mentioned example of the present disclosure may have the following additional technical features.
According to some embodiments of the present example, a plurality of burner units is provided in the installation space and sequentially arranged along a left-right direction, a plurality of first air inlets and a plurality of second air inlets are provided, the plurality of first air inlets and the plurality of second air inlets are alternately arranged along an arrangement direction of the plurality of burner units, and the plurality of first air inlets is in communication with internal gas channels of the plurality of burner units in one-to-one correspondence.
According to some examples of the present disclosure, each of the plurality of first air inlets comprises a plurality of air holes spaced apart along a front-rear direction.
According to some examples of the present disclosure, each of the plurality of second air inlets extends in the front-rear direction to form a long strip shape, each of the plurality of second air inlets comprises a first section and a second section that are arranged alternately and in communication with each other, a width of the first section in the left-right direction is smaller than a width of the second section in the left-right direction, and in the front-rear direction, the first section corresponds to a position of one air hole of the plurality of air holes and the second section is located between two adjacent air holes of the plurality of air holes.
According to some examples of the present disclosure, the side enclosing plate is provided with a separation structure for separating the plurality of burner units.
According to some examples of the present disclosure, the separation structure comprises a separation flange disposed at an upper end of the side enclosing plate and extending into the installation space, and the separation flange abuts between two adjacent burner units of the plurality of burner units.
According to some examples of the present disclosure, an outlet of the external gas channel is defined between upper parts of two adjacent burner units, a front edge and a rear edge of the upper end of the side enclosing plate are provided with the separation flanges, respectively, and the two separation flanges cooperate with the plurality of burner units to separate two adjacent outlets.
According to some examples of the present disclosure, each of the separation flanges comprises a plurality of separation tongues arranged along the left-right direction, and two adjacent burner units of the plurality of burner units are separated by one of the plurality of separation tongues.
According to some examples of the present disclosure, one burner unit of the plurality of burner units is disposed between every two separation tongues of the plurality of separation tongues, and roots of the two adjacent separation tongues are spaced apart from each other to define a separating gap for positioning the burner unit in an up-down direction.
According to some examples of the present disclosure, the side enclosing plate is further provided with a positioning structure configured to position the burner unit in an up-down direction.
According to some examples of the present disclosure, the positioning structure comprises positioning holes extending along the up-down direction on the side enclosing plate.
According to some examples of the present disclosure, at least one of a front side surface and a rear side surface of the installation space has the positioning holes provided therein, and each burner unit corresponds to at least two positioning holes.
According to some examples of the present disclosure, a lower end of the side enclosing plate is provided with a positioning flange extending into the installation space and configured to position a bottom of the burner unit.
According to some examples of the present disclosure, an upper part of the side enclosing plate is provided with a mounting portion for mounting an ignition needle.
According to some examples of the present disclosure, the side enclosing plate comprises: a front side plate; a rear side plate, where the front side plate and the rear side plate are spaced apart from each other in a front-rear direction; a left side plate disposed on a left side of the front side plate, where a front edge and a rear edge of the left side plate are connected to a left edge of the front side plate and a left edge of the rear side plate, respectively; and a right side plate disposed on a right side of the front side plate, where a front edge and a rear edge of the right side plate are connected to a right edge of the front side plate and a right edge of the rear side plate, respectively. Two of a lower end of the front side plate, a lower end of the rear side plate, a lower end of the left side plate, and a lower end of the right side plate abut against the air distribution plate, and the other two of the lower end of the front side plate, the lower end of the rear side plate, the lower end of the left side plate, and the lower end of the right side plate are connected to the air distribution plate through threads.
In a second aspect, a burner according to an example of the present disclosure comprises a housing for the burner according to the embodiment of the present disclosure in the first aspect.
In a third aspect, a burner according to an embodiment of the present disclosure comprises: a housing defining a housing cavity, where an air inlet is defined in a lower part of the housing and a burning port is defined in an upper part of the housing, and the air inlet and the burning port are in communication with the housing cavity; and at least a burner unit arranged in the housing cavity, where a burning fire hole exposed from the burning port is defined in an upper part of each of the at least one burner unit, and an internal gas channel is defined in each of the at least one burner unit to allow a part of air entering from the air inlet to flow to the burning fire hole through the internal gas channel. The burner has an external gas channel provided at an outer side surface of each of the at least one burner unit, the external gas channel being in communication with the air inlet and the burning port to allow an other part of the air entering from the air inlet to flow to the burning fire hole through the external gas channel.
According to some embodiments of the present disclosure, the at least one burner unit comprises a plurality of burner units sequentially arranged in a horizontal direction, and along an arrangement direction of the burner units, each of the plurality of burner units has the external gas channel provided on at least a side thereof.
According to some embodiments of the present disclosure, the external gas channel is provided between and shared by two adjacent burner units of the plurality of burner units.
According to some embodiments of the present disclosure, the burner unit comprises a burner top plate, wherein the burning fire hole is provided at the burner top plate, and a burner side plate connected to the burner top plate. The internal gas channel is defined by the burner top plate and the burner side plate, the external gas channel provided between two adjacent burner units is formed at least by spacing apart two adjacent burner side plates, and the external gas channel provided between the burner unit and the housing is formed at least by spacing apart the burner side plate and the housing.
According to some embodiments of the present disclosure, the burner top plate is disposed at and covered an upper part of the burner side plate, the burner top plate is provided with an outer flange extending downward, and an outlet of the external gas channel is formed by spacing apart outer flanges of two adjacent burner top plates.
According to some embodiments of the present disclosure, the burner side plate comprises a first side plate and a second side plate, the first side plate and the second side plate are horizontally spliced to form a hollow structure extending in an up-down direction, the burner top plate is disposed at and covered an upper part of the hollow structure, the external gas channel provided between two adjacent burner units is formed at least by spacing apart the first side plate and the second side plate that are adjacent to each other, and the external gas channel provided between the burner unit and the housing is formed at least by spacing apart the housing and either the first side plate or the second side plate whichever is adjacent to the housing.
According to some embodiments of the present disclosure, the burner further comprises a liquid-cooling pipe extending into the housing. The liquid-cooling pipe is close to the at least one burner unit or connected to the at least one burner unit, and the liquid-cooling pipe is closer to the burning fire hole than an inlet of the internal gas channel.
According to the invention a side enclosing plate, wherein an installation space penetrating in the up-down direction is enclosed by the side enclosing plate, allowing a burner unit of the burner to be installed in the installation space; an air distribution plate disposed at and sealing a lower end opening of the installation space and is configured to be located above the burner unit, wherein a first air inlet and a second air inlet for air inflow, are defined at the air distribution plate and spaced apart from each other, wherein the first air inlet is in communication with the internal gas channel in the burner unit, the second air inlet is in communication with the external gas channel located at a side portion of the burner unit.
According to some embodiments of the present disclosure, wherein the installation space is configured to accommodate a plurality of burner units sequentially arranged along a left-right direction, a plurality of the first air inlets and a plurality of the second air inlets are provided, the plurality of the first air inlets and the plurality of the second air inlets are alternately arranged along the arrangement direction of the plurality of burner units, the plurality of the first air inlets are in communication with internal gas channels of the plurality of burner units in one-to-one correspondence.
According to some embodiments of the present disclosure, wherein the side enclosing plate comprises: a front side plate; a rear side plate, wherein the front side plate and the rear side plate are spaced apart from each other in a front-rear direction; a left side plate disposed on a left side of the front side plate, wherein a front edge and a rear edge of the left side plate are respectively connected to a left edge of the front side plate and a left edge of the rear side plate; a right side plate disposed on a right side of the front side plate, wherein a front edge and a rear edge of the right side plate are respectively connected to a right edge of the front side plate and a right edge of the rear side plate, wherein two of a lower end of the front side plate, a lower end of the rear side plate, a lower end of the left side plate, and a lower end of the right side plate abut against the air distribution plate, the other two of the lower end of the front side plate, the lower end of the rear side plate, the lower end of the left side plate, and the lower end of the right side plate are connected to the air distribution plate through threads.
According to some embodiments of the present disclosure, wherein the side enclosing plate is provided with a separation structure for separating the plurality of burner units, the separation structure comprises a separation flange disposed at an upper end of the side enclosing plate and the separation flange extending into the installation space, and the separation flange is configured to abut between two adjacent burner units of the plurality of burner units.
According to some embodiments of the present disclosure, wherein an outlet of the external gas channel is defined between upper parts of two adjacent burner units, a front edge and a rear edge of the upper end of the side enclosing plate are respectively provided with the separation flanges, two of the separation flanges cooperate with the plurality of burner units to separate two adjacent outlets.
According to some embodiments of the present disclosure, wherein each of the separation flanges comprises a plurality of separation tongues arranged along the left-right direction, two adjacent burner units of the plurality of burner units are separated by one of the plurality of separation tongues; one burner unit of the plurality of burner units is disposed between every two separation tongues of the plurality of separation tongues, roots of the two adjacent separation tongues are spaced apart from each other to define a separating gap to position the burner unit in the up-down direction.
According to some embodiments of the present disclosure, wherein the side enclosing plate is further provided with a positioning structure to position the burner unit in the up-down direction, the positioning structure comprises positioning holes extending along the up-down direction on the side enclosing plate; at least one of a front side surface and a rear side surface of the installation space is provided with the positioning holes, each burner unit corresponds to at least two positioning holes.
According to some embodiments of the present disclosure, wherein a lower end of the side enclosing plate is provided with a positioning flange extending into the installation space and configured to position a bottom of the burner unit.
According to some examples of the present disclosure, the air inlet comprises: a first air inlet in communication with the internal gas channel to introduce gas into the internal gas channel through the first air inlet; and a second air inlet in communication with the external gas channel to introduce gas into the external gas channel.
According to some examples of the present disclosure, the burner has a first burning mode and a second burning mode. A burning power of the burner in the first burning mode is lower than a burning power of the burner in the second burning mode, and the second air inlet is configured to introduce no gas into the external gas channel in the first burning mode and introduce gas into the external gas channel in the second burning mode.
According to some examples of the present disclosure, in a horizontal direction, the upper part of each of the at least burner unit has a width direction and a length direction perpendicular to the width direction; along the width direction, two outlets of the external gas channels are provided at two sides of each of the at least one burner unit; the two outlets extend respectively along the length direction and are not in communication with each other.
According to some examples of the present disclosure, an inlet end of the internal gas channel has an injection structure provided thereon, the injection structure being configured to inject gas into the internal gas channel.
In a fourth aspect, a water heating apparatus according to an embodiment of the present disclosure comprises: a housing for the burner according to the embodiment of the present disclosure in the first aspect, or a burner according to the embodiment of the present disclosure in the second aspect, or a burner according to the embodiment of the present disclosure in the third aspect.
The additional aspects and advantages of the present disclosure will be partially given in the following description, and partially become apparent from the following description, or understood through the practice of the present disclosure.

BRIEF DESCRIPTION OF DRAWINGS

The above and/or additional aspects and advantages of the present disclosure will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings.

Fig. 1 is a schematic structural diagram of a burner according to an embodiment of the present disclosure.
Fig. 2 is a schematic structural diagram of a burner unit and a liquid-cooling pipe of a burner according to an embodiment of the present disclosure.
Fig. 3 is a diagram of a burning principle of a burner according to an embodiment of the present disclosure.
Fig. 4 is a schematic structural diagram of a housing for a burner according to an embodiment of the present disclosure.
Fig. 5 is a schematic structural diagram of an air distribution plate of a burner according to an embodiment of the present disclosure.
Fig. 6 is a schematic structural diagram of an air distribution plate of a burner according to an embodiment of the present disclosure.
Fig. 7 is a schematic structural diagram of a front side plate of a burner according to an embodiment of the present disclosure.
Fig. 8 is a front view of a front side plate of a burner according to an embodiment of the present disclosure.
Fig. 9 is a top view of a front side plate of a burner according to an embodiment of the present disclosure.
Fig. 10 is a left side view of a front side plate of a burner according to an embodiment of the present disclosure.

Reference numerals:

burner 100;
housing 10; housing cavity 101; air inlet 102; first air inlet 1021; air hole 1020; second air inlet 1022; first section 1023; second section 1024; burning port 103;
burner unit 20; burning fire hole 201; internal gas channel 202; external gas channel 203; burner top plate 21; outer flange 211; burner side plate 22; first side plate 221; second side plate 222;
liquid-cooling pipe 30;
side enclosing plate 11; positioning flange 1101; air distribution plate 12; front side plate 111; rear side plate 112; left side plate 113; right side plate 114;
separation structure 40; separation flange 41; separation tongue 411; separating gap 401; positioning structure 50; positioning hole 51; mounting portion 60; ignition needle 610.

DESCRIPTION OF EMBODIMENTS

The embodiments of the present disclosure are described in detail below. Examples of the embodiments are illustrated in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are illustrative and merely used to explain the present disclosure, and they cannot be understood as limitations on the present disclosure. Those of ordinary skill in the art are able to make various changes, modifications, substitutions and variants to these embodiments without departing from the principle and purpose of the present disclosure. The scope of the present disclosure is defined by the claims and equivalents thereof.
In the present disclosure, it should be understood that orientation or positional relations indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "internal", "external", "axial", "radial", "peripheral", etc., are orientation or positional relations based on the drawings, only for facilitating and simplifying the description of the present disclosure, rather than indicating or implying that the devices or elements referred to must have a specific orientation, must be constructed and operated in a specific orientation. Therefore, there terms cannot be understood as limitations of the present disclosure.
With reference to the drawings, a burner 100 and a water heating apparatus having the same according to the embodiments of the present disclosure are described below.
Referring to Fig. 1, a burner 100 according to some embodiments of the present disclosure may comprise a housing 10 and a burner unit 20. In the embodiment illustrated in Fig. 1, a plurality of burner units 20, specifically, eight burner units are provided. The number of the burner units 20 is not limited thereto. For example, one or any number of burner units 20 may be provided. That is, in the embodiments of the present disclosure, at least one burner unit 20 is provided.
As illustrated in combination with Fig. 1 and Fig. 4, a housing cavity 101 is defined in the housing 10, and the burner units 20 can be disposed in the housing cavity 101. An air inlet 102 is defined in a lower part of the housing 10, and the air inlet 102 is in communication with the housing cavity 101. A burning port 103 is defined in an upper part of the housing 10, and the burning port 103 is in communication with the housing cavity 101. As illustrated in Fig. 1 to Fig. 3, a burning fire hole 201 is formed in an upper part of the burner unit 20, and the burning fire hole 201 is exposed from the burning port 103. In some embodiments, the burning fire hole 201 may be higher or lower than the burning port 103, or may be flush with the burning port 103. An internal gas channel 202 may be defined in the burner unit 20, enabling a part of air entering from the air inlet 102 to flow to the burning fire hole 201 through the internal gas channel 202, and to burn at the burning fire hole 201. The air in the internal gas channel 201 flows in a flow direction illustrated by arrows in Fig. 3.
The burner 100 is provided with an external gas channel 203 at an outer side surface of the burner unit 20. As illustrated in Fig. 2 and Fig. 3, the external gas channel 203 can be in communication with the air inlet 102 and the burning port 103, enabling the other part of the air entering from the air inlet 102 to flow to the burning fire hole 201 through the external gas channel 203 and to burn at the burning fire hole 201. The air in the external air channel 202 flows in the flow direction illustrated by arrows in Fig. 3.
Compared with a burning apparatus in the related art, the burner 100 according to the embodiments of the present disclosure provides a new burner principle structure, which can strengthen burning, improve burning conditions, and improve burning performance.
Specifically, Applicant found through research that in the related art, only one gas channel is provided in the burning single piece in the burning device. Such a structure has many disadvantages in terms of that, for example, all gas burning is primary air, without secondary air, only primary air mixing and burning can be achieved, and the burning intensity cannot be improved; many burning single pieces are provided, and all parts are necessarily designed to be large, resulting in high manufacturing cost; it has poor burning performance, and after the mixed air is increased, the nitrogen oxides are decreased; the flame has poor stability, likely to flame-out, difficult to ignite, difficult to spread fire; the performance of big fire or soft fire is maintained by an injection ability of the nozzle, and the environmental adaptability is poor; due to the limited air volume required for soft fire, the burning intensity cannot be increased; when subjected to the influence of working air of the external fan, the air volume for the soft fire is greater, and in order to ensure the overall burning performance, the burning intensity of the big fire is smaller, and the load cannot be increased; and the burning is of a type of natural suction, in which the air speed is slow and the strength of the radiation is large, such that the cooling effect is poor, and the burning intensity cannot be increased.
The internal structure of the burner 100 according to the embodiments of the present disclosure is newly designed, and it has been optimized and theoretically improved. In addition to the internal gas channel 202, an external gas channel 203 is provided in the burner 100. In this case, the internal gas channel 202 can be used for primary air supply, and the external gas channel 203 can be used for secondary air supply. The air for burning can be the primary air and the secondary air, thereby intensifying the burning and improving the burning conditions, and improving burning performance. The burner 100 according to the embodiments of the present disclosure has a faster burning speed, so that the temperature of the upper part of the burner unit 20 can be lower, and the entire load can be increased. At the same time, the secondary air can have a cooling effect on the burner unit 20, which is conducive to lowering the temperature of the upper part of the burner unit 20, thereby further increasing the load.
Studies have indicated that the burner 100 according to the embodiments of the present disclosure can strengthen the burning intensity by 50%, which is conducive to reducing the volume of the burner. At the same time, a ratio of air is reduced, and the burning performance is more stable. Due to the flow of the secondary air, the nitrogen oxides can be decreased instead. In addition, the burning intensity of the burner unit 20 is increased, which increases the load of the whole machine. Under the same load, the cost of the whole apparatus can be reduced.
In some embodiments, the burner 100 may employ a gas driving device such as a fan to increase the air flow speed. A suction force of the fan can be changed from the primary air to the secondary air, thereby increasing the entire burning air volume, and strengthening the overall burning intensity, and allowing the burning to be more stable.
According to some embodiments of the present disclosure, each burner unit 20 has an excess air coefficient of a, and a burning power of P, where 0.9≤a≤1.0 and 2.8KW≤P≤3.2KW. Through a large number of experiments, the excess air coefficient of the atmospheric burner 100 is too great, and the flame is extremely unstable, especially for the water-cooled structure, whose fire hole is formed through a planar process, and which originally has no stable flame and extremely poor flame performance. Therefore, when the excess air coefficient of the burner 100 is controlled to be a = 0.9 to 1.0, the burning effect is better. In terms of the load of the single piece, due to the introduction of a large amount of secondary air, the water cooling effect is optimized, and the load of the single piece can be strengthened to 2.8 to 3.2 KW.
Referring to Fig. 1 to Fig. 3, in some embodiments of the present disclosure, a plurality of burner units 20 may be provided. The plurality of burner units 20 may be sequentially arranged in a horizontal direction, for example, in a left-right direction as illustrated in Fig. 1, or in other directions such as a front-rear direction. Along an arrangement direction of the plurality of burner units 20, the external gas channel 203 is provided on at least one side of each burner unit 20. In other words, the external air channel 203 may be defined on only one side of the burner unit 20 along the arrangement direction, or the external air channel 203 can be defined on both sides of the burner unit 20 along the arrangement direction. Such a position arrangement of the external gas channel 203 is more reasonable and convenient for implementation as well as for arranging the burner unit 20.
According to some embodiments of the present disclosure, as illustrated in Fig. 2 and Fig. 3, the external gas channel 203 may be disposed between two adjacent burner units 20 and shared by these two adjacent burner units 20. In other words, two adjacent burner units 20 can share the external gas channel 203 located between these two burner units 20,without requiring to separately provide their own external gas channels 203. In this way, the utilization of the internal space of the burner 100 can be improved, which is conducive to further reducing the volume of the burner 100, and two adjacent burner units 20 can have a relatively small spacing therebetween, thereby improving the overall burning effect of the burner 100.
According to some embodiments of the present disclosure, along the arrangement direction of the plurality of burner units 20, the minimum extension size of each external gas channel 203 may be smaller than the minimum extension size of the internal gas channel 202. Taking Fig. 3 as an example, the plurality of burner units 20 is arranged in the left-right direction. Along the left-right direction, the minimum extension size of each external gas channel 203 in the left-right direction may be smaller than the minimum extension size of the internal gas channel 202 in the left-right direction. In this way, a ratio of the primary air to the secondary air can be controlled more reasonably, which is conducive to further improving the burning performance and can stabilize the flame.
Referring to Fig. 1 to Fig. 3, in some embodiments of the present disclosure, the burner unit 20 may comprise a burner top plate 21 and a burner side plate 22. The burning fire hole 201 may be defined in the burner top plate 21. The burner side plate 22 is connected to the burner top plate 21, and the internal gas channel 202 is defined by the burner side plate 22 and the burner top plate 21. When a plurality of burner units 20 is provided and the external gas channel 203 is provided between two adjacent burner units 20, the external gas channel 203 provided between the adjacent two burner units 20 may be formed by spacing apart at least two adjacent burner side plates 22, and the external gas channel 203 provided between the burner unit 20 and the housing 10 may be formed by spacing apart at least the burner side plate 22 and the housing 10.
For example, in some specific embodiments, the burner top plate 21 is inserted into an upper part of the burner side plate 22 to cover the upper part of the burner side plate 22, and the external gas channel 203 between two adjacent burner units 20 is formed by spacing apart adjacent burner side plates 22 of these two adjacent burner units 20. For example, in some other specific embodiments, the burner top plate 21 is sheathed on the upper part of the burner side plate 22 to cover the upper part of the burner side plate 22. The external gas channel 203 between two adjacent burner units 20 is formed by spacing apart adjacent burner side plates 22 and burner top plates 21 of these two adjacent burner units 20.
According to some specific examples of the present disclosure, as illustrated in Fig. 3, the external gas channel 203 is provided between every two adjacent burner units 20, and the external gas channel 203 is also located between the outermost burner unit 20 and the housing 10. In this case, along the arrangement direction of the plurality of burner units 20, the external gas channels 203 and the burner units 20 can be arranged alternately. Studies have indicated that such a structure has a better effect on enhancing burning and improving burning performance.
In some other specific examples, the external gas channel 203 and the burner unit 20 are not arranged in an alternate manner. For example, they are arranged in such a manner of an external gas channel 203, a burner unit 20, a burner unit 20, an external gas channel 203, a burner unit 20, a burner unit 20, an external air channel 203, and the like. In this case, two adjacent burners 100 may be connected to each other and be spaced apart from the other two connected burner units 20. Regarding such a structure, each burner unit 20 can realize the replenishment of the primary air and the secondary air, and can also strengthen the burning and improve the burning performance.
In some embodiments, referring to Fig. 2 and Fig. 3, the burner top plate 21 may be disposed at and configured to cover an upper part of the burner side plate 22, and the burner top plate 21 may be provided with an outer flange 211 extending downward, and the outer flanges 211 of two adjacent burner top plates 21 may be spaced apart from each other to define an outlet of the external air channel 203. The outer flange 211 not only has the effect of strengthening the burner unit 20, but also can guide the gas to flow upward, which is conducive to further improving the performance of the burner 100.
Further referring to Fig. 2 and Fig. 3, the burner side plates 22 may comprise a first side plate 221 and a second side plate 222. The first side plate 221 and the second side plate 222 are horizontally spliced to form a hollow structure extending in an up-down direction. That is, the first side plate 221 and the second side plate 222 are horizontally distributed and spliced together to form a structure, which may be a hollow structure extending in the up-down direction. The burner top plate 21 can be disposed at and configured to cover an upper part of the hollow structure.
The external gas channel 203 provided between two adjacent burner units 20 may be defined at least by spacing apart the first side plate 221 and the second side plate 222 that are adjacent to each other. The external air channel 203 provided between the burner unit 20 and the housing 10 may be defined at least by spacing apart the housing 10 and one of the first side plate 221 and the second side plate 222, which is adjacent to the housing. For example, for the leftmost burner unit 20, if the first side plate 221 thereof is disposed on the left side, the first side plate 221 adjacent to the housing 10 is spaced apart from the housing 10 to define the external air channel 203. For the rightmost burner unit 20, if the second side plate 222 thereof is arranged on the right side, the second side plate 222 adjacent to the housing 10 is spaced apart from the housing 10 to define the external gas channel 203. The second side plate 222 of the burner unit 20 on the left side and the first side plate 221 of the burner unit 20 on the right side can be spaced apart from each other to define the external gas channel 203 provided between these two adjacent burner units 20 . Such a structure is easier to be manufactured and has higher structural stability.
Referring to Fig. 1 to Fig. 3, in some embodiments of the present disclosure, the burner 100 further comprises a liquid-cooling pipe 30, and the liquid-cooling pipe 30 extends into the housing 10. The liquid-cooling pipe 30 may be close to the burner unit 20, or the liquid-cooling pipe 30 may be connected to the burner unit 20.
In this way, the liquid-cooling pipe 30 can exchange heat with the burner unit 20 to directly cool the burner unit 20. When it is burning at the burning fire hole 201, the heat generated by radiation is transferred to the burner unit 20 and indirectly exchanges heat with the liquid-cooling pipe 30. At the same time, the air, in the form of cold air, is supplied from a lower side of the burner unit 20 to form an air-cooling effect, which is conducive to enhancing the liquid cooling effect. In other words, the air, after passing through the liquid-cooling pipe 30, can become cold air, and thus the air can be provided for burning, while cooling the burner unit 20 and cools the flame in the meantime. In this way, the temperature in the area surrounding the burner unit 20 is decreased and a stronger air-cooling effect is created, thereby improving the water-cooling effect, and further increasing the load of the burner.
As illustrated in Fig. 2 and Fig. 3, the liquid-cooling pipe 30 is closer to the burning fire hole 201 than an inlet of the internal gas channel 202. In this case, the liquid-cooling pipe 30 can be disposed on the upper part of the burner unit 20. The liquid-cooling pipe 30 can cool the upper part of the burner 100 with a higher temperature, thereby improving the cooling effect. In some specific examples of the present disclosure, the liquid-cooling pipe 30 is a water-cooling pipe.
As illustrated in Fig. 5, in some embodiments of the present disclosure, the air inlet 102 may comprise a first air inlet 1021 and a second air inlet 1022, and the internal gas channel 202 may be in communication with the first air inlet 1021 to introduce gas into the internal gas channel 202 through the first air inlet 1021. The second air inlet 1022 may be in communication with the external gas channel 203, so that gas can be introduced into the external gas channel 203 through the second air inlet 1022. The air inflow of the internal gas channel 202 can be separated from the air inflow of the external gas channel 203, thereby reducing the interference between these two channels, improving the air inflow effect, and improving the burning performance.
In some embodiments of the present disclosure, the burner 100 may have a first burning mode and a second burning mode, and a burning power of the burner 100 in the first burning mode may be smaller than a burning power of the burner 100 in the second burning mode. The second air inlet 1022 may introduce no gas into the external gas channel 203 in the first burning mode and may introduce gas into the external gas channel 203 in the second burning mode.
Therefore, in the first burning mode with relatively low burning power, gas such as primary air and fuel gas can be introduced through the internal gas channel 202, and the fuel gas can be burned in the burner unit 20 under the supply of the primary air. In the second burning mode with relatively low burning power, the gas such as secondary air can be introduced through the internal gas channel 202 as well as the external gas channel 203. In the burner unit 20, the fuel gas can be burned at the burning fire hole 201 under the supply of the primary air and the secondary air.
It can be understood that, in order to facilitate the introduction of gas, an injection structure for injecting gas into the internal gas channel 202 may be disposed at an inlet end of the internal gas channel 202. For example, a nozzle for injecting fuel gas into the internal gas channel 202 is disposed at the inlet end of the internal gas channel 202. In this case, the internal gas channel 202 may constitute a channel based on the principle of atmospheric natural injection burning. When the fuel gas is injected from the nozzle into the internal gas channel 202, the primary air injection is performed at a throat of the internal gas channel 202, and the primary air can enter the internal gas channel 202 under the effect of the injection. During the upward flow of the gas, the fuel gas and the primary air will be fully mixed, and burning will occur at the burning fire hole 201. In Fig. 3, A represents a burning inner flame, and B represents an injected fuel gas. In the above structure, the stability of the burning inner flame generated at the burning fire hole 201 is determined by the primary air. During the intensified burning, only the secondary air is increased, but the primary air is slightly reduced, which is more conducive to ensuring the stability of burning.
As illustrated in Fig. 1, the upper part of the burner unit 20 has a width direction and a length direction that are perpendicular to each other in a horizontal direction. In the example illustrated in Fig. 1, the width direction is the left-right direction, and the length direction is the front-rear direction. Along the width direction, two outlets of the external gas channels 203 are provided at two sides of the burner unit 20, respectively. The two outlets extend in the length direction, respectively, and the two outlets are not in communication with each other.
The housing 10 of the burner 100 according to the embodiments of the present disclosure will be described below in conjunction with some embodiments of the present disclosure. The housing 10 provides a brand-new burner frame, which can effectively provide the burner unit 20 with the air required for burning and control the air required for burning.
As illustrated in Fig. 4 and Fig. 5, the housing 10 according to the embodiments of the present disclosure may comprise a side enclosing plate 11 and an air distribution plate 12. The side enclosing plate 11 can enclose and form an installation space that is penetrating in the up-down direction, and the side enclosing plate is configured to be installed with the burner unit 20 of the burner 100. The air distribution plate 12 can be sealed at a lower end opening of the installation space, the air distribution plate 12 can be located above the burner unit 20, and a housing cavity 101 can be defined by the air distribution plates 12 and the side wall 11.
As illustrated in Fig. 5 and Fig. 6, the air distribution plate 12 is provided with first air inlets 1021 and second air inlets 1022. The first air inlet 1021 is in communication with the internal gas channel 202 in the burner unit 20 to introduce gas into the internal gas channel 202 through the first air inlet 1021. The external gas channel 203 located at a side portion of the burner unit 20 is in communication with the second air inlet 1022 to introduce gas into the external gas channel 203 through the second air inlet 1022. The first air inlet 1021 and the second air inlet 1022 are spaced apart from each other to reduce the interference between the external gas channel 203 and the internal gas channel 202.
As the housing 10 of the burner 100 according to the embodiments of the present disclosure has the side enclosing plate 11 and an air distribution plate 12, the air distribution and control can be achieved, the air distribution plate 12 can finely distribute the air to optimize the burning and enhance the burning, and the burner unit 20 can be restricted inside, allowing the burner unit 20 to have a stable and reliable installation position. When the burning occurs in the burner unit 20, the gas can be supplied through the internal gas channel 202, and the gas can be supplemented through the external gas channel 203, allowing the utilization rate of the air to be close to 100%, thereby enhancing the burning effect, improving the burning conditions, and enhancing the burning performance. In some embodiments, the burning intensity can be enhanced by 50%. At the same time, the housing 10 can play a role of overall collection and transportation, which is conducive to reducing cost and volume.
In the embodiments of the present disclosure, the number of burner units 20 disposed in the housing is not specifically limited, which can be one or more. For example, in the embodiments illustrated in Fig. 1 to Fig. 3, a plurality of burner units 20 may be arranged in the installation space, and the plurality of burner units 20 may be arranged sequentially along the left-right direction. A plurality of first air inlets 1021 may be provided, and a plurality of second air inlets 1022 may be provided. The plurality of first air inlets 1021 and the plurality of second air inlets 1022 may be arranged alternately along the arrangement direction, i.e., the plurality of first air inlets 1021 and the plurality of second air inlets 1022 are alternately arranged in the left-right direction. The second air inlet 1022 is disposed between two adjacent first air inlets 1021, and the first air inlet 1021 is disposed between two adjacent second air inlets 1022. The plurality of first air inlets 1021 is in communication with the internal gas channels 202 of the plurality of burner units 20 in a one-to-one correspondence. In this way, the gas can be introduced into the internal gas channel 202 of each burner unit 20 through the corresponding first air inlet 1021, thereby improving the gas flow effect.
In some embodiments, as illustrated in Fig. 5 and Fig. 6, each first air inlet 1021 may comprise a plurality of air holes 1020, and the plurality of air holes 1020 may be spaced apart from each other along the front-rear direction. In this way, the air inflow can be dispersed, and this structure is more compatible with the structure of the burner unit 20 in some embodiments, for example, the air holes 1020 correspond to air distribution rods of the burner unit 20 in a one-to-one correspondence, thereby improving the air distribution effect.
As illustrated in Fig. 6, the second air inlet 1022 may extend along the front-rear direction to form a long strip shape. The second air inlet 1022 comprises first sections 1023 and second sections 1024, which are alternately arranged along the front-rear direction and in communication with each other. A width of the first section 1023 in the left-right direction is smaller than a width of the second section 1024 in the left-right direction. Along the front-rear direction, the first section 1023 corresponds to a position of the air hole 1020, and the second section 1024 is located between two adjacent air holes 1020. This structure layout is more reasonable, which not only facilitates the installation of the burner unit 20 and the air distribution plate 12, but also makes the opening of the second air inlet 1022 relatively larger, which is conducive to increasing a volume of the air inflow.
Further referring to Fig. 6, the air hole 1020 may be a round hole, which is more conducive to air inflow. In some embodiments, the round hole is convenient to be put a nozzle therein, which is conducive to uniformly injecting gas.
According to some embodiments of the present disclosure, as illustrated in Fig. 1, the side enclosing plate is provided with a separation structure 40 for separating the plurality of burner units 20, which can not only enhance the installation reliability of the burner units 20, but also can be beneficial to separate the plurality of burner units 20 with a predetermined interval. The burner units 20 are positioned and spaced with a certain interval, to form a stable and reliable burning structure. The specific structure of the separation structure 40 is not specifically limited in the present disclosure, as long as it can satisfy the function of separating the plurality of burner units 20.
Referring to Fig. 1, Fig. 4 and Fig. 5, in some embodiments of the present disclosure, the separation structure 40 may comprise a separation flange 41, and the separation flange 41 is disposed at an upper end of the side enclosing plate 11 and extends into the installation space. The separation flange 41 can be abutted between two adjacent burner units 20. In this way, two adjacent burner units 20 can be separated by the separation flange 41, the separation effect is good, and it is convenient to dispose the separation structure 40.
According to some embodiments of the present disclosure, an outlet of the external gas channel 203 may be defined between the upper parts of two adjacent burner units 20. A front edge and a rear edge of the upper end of the side enclosing plate 11 are respectively provided with the separation flanges 41, and the two separation flanges 41 cooperate with the burner unit 20 to separate two adjacent outlets. In other words, the separation flange 41 can cooperate with each burner unit 20 to separate the outlets of the external gas channels 203 located on both sides of the burner unit 20. In this way, the burner 100 forms a stable ignition at both ends of the burner unit 20, and after the fire is passed through, it can match the first air inlet 1021 of the air distribution plate 12 for introducing primary air, which is more conducive to full control of performance.
As illustrated in Fig. 4, Fig. 5 and Fig. 7, each separation flange 41 may comprise a plurality of separation tongues 411, and the plurality of separation tongues 411 may be arranged along the left-right direction. Two adjacent burner units 20 can be separated by the separation tongue 411. Specifically, during manufacturing, the shape of the separation tongue 411 can match the shape of the junction between the burner units 20, which is more convenient to the manufacturing and has a good separation effect on the burner units 20.
According to some embodiments of the present disclosure, referring to Fig. 1 and Fig. 4, one burner unit 20 may be disposed between every two separation tongues 411, and roots of two adjacent separation tongues 411 are spaced apart from each other to define a separating gap 401. The separating gap 401 can position the burner unit 20 in the up-down direction, so that the burner unit 20 can be accurately installed in the up-down direction, reducing the occurrence of skew, and the burner units 20 are relatively fixed and stable without being affected by the transportation bumps or impacts, and thus the performance of the burner 100 is more stable.
In addition, in addition to the separating gap 401, the burner unit 20 may be positioned by other structures. Referring to Fig. 1, Fig. 4 and Fig. 7, in some embodiments of the present disclosure, the side enclosing plate 11 is further provided with a positioning structure 50, and the positioning structure 50 may be configured to position the burner units 20 in the up-down direction. In some embodiments, the positioning structure 50 may comprise a positioning hole 51 extending in the up-down direction along the side enclosing plate 11, and the burner unit 20 may extend into the positioning hole 51 to engage with the positioning hole 51, thereby being positioned in the up-down direction. In this way, the positioning effect is good, and the burner unit 20 can be installed in a more reliable manner.
According to some embodiments of the present disclosure, at least one of a front side and a rear side of the installation space may be provided with the positioning hole 51, and each burner unit 20 may correspond to at least two positioning holes 51. In this way, the burner units 20 can be positioned through the positioning holes 51, improving the positioning effect. In some embodiments, two positioning holes 51 may be disposed on a same side of the housing 10 or on different sides of the housing 10, which can be flexibly set according to actual conditions.
As illustrated in Fig. 7 and Fig. 10, a lower end of the side enclosing plate 11 may be provided with a positioning flange 1101, and the positioning flange 1101 extends into the installation space. The positioning flange 1101 can be configured to position a bottom of the burner unit 20. In this way, the installation reliability and accuracy of the burner unit 20 can be further improved.
Referring to Fig. 1, Fig. 4, Fig. 7 and Fig. 8, an upper part of the side enclosing plate 11 is provided with a mounting portion 60, and the mounting portion 60 can be used for mounting an ignition needle 610. In this way, the side enclosing plate 11 can allow the ignition needle 610 and the burner unit 20 to have a stable and accurate position for ignition and feedback, which is conducive to improving the burning effect. The specific structure of the mounting portion 60 is not limited in the present disclosure. In some embodiments, the mounting portion 60 may be a mounting hole, a threaded fastener may penetrate the mounting hole to connect the ignition needle 610 and the side enclosing plate 11, and the mounting structure is reliable and easy in terms of installation and operation.
The connection between the air distribution plate 12 and the side enclosing plate 11 is not specifically limited in the present disclosure. In some embodiments of the present disclosure, the front and rear ends or the left and right ends of the air distribution plate 12 may be connected to the side enclosing plate 11 through threads, and the rest two ends of the air distribution plate 12 may abut against the side enclosing plate 11. In other words, the front and rear ends of the air distribution plate 12 may be connected to the side enclosing plate 11 through threads, and the left and right ends of the air distribution plate 12 may abut against the side enclosing plate 11; or the left and right ends of the air distribution plate 12 may be connected to the side enclosing plate 11 through threads, and the front and rear ends of the air distribution plate 12 may abut against the side enclosing plate 11. This structure is not only more reliable in connection, but also more convenient in terms of installation and operation.
As illustrated in Fig. 5, according to some embodiments of the present disclosure, the side enclosing plate 11 may comprise a front side plate 111, a rear side plate 112, a left side plate 113, and a right side plate 114. The front side plate 111 and the rear side plate 112 are spaced apart from each other in the front-rear direction. The left side plate 113 is disposed on a left side of the front side plate 111, a front edge of the left side plate 113 is connected to a left edge of the front side plate 111, and a rear edge of the left side plate 113 is connected to a left edge of the rear side plate 112. The right side plate 114 is disposed on a right side of the front side plate 111, a front edge of the right side plate 114 is connected to a right edge of the front side plate 111, and a rear edge of the right side plate 114 is connected to a right edge of the rear side plate 112. A lower end of the front side plate 111, a lower end of the rear side plate 112, a lower end of the left side plate 113, and a lower end of the right side plate 114 are all connected to the air distribution plate 12. In this way, the side enclosing plate 11 (the front side plate 111, the right side plate 114, the left side plate 113, and the right side plate 114) and the air distribution plate 12 can enclose and define a frame structure having an opening at an upper end, and the burner units 20 can be stably installed in the frame structure.
According to some embodiments of the present disclosure, the adjacent edges of the front side plate 111, the rear side plate 112, the left side plate 113, and the right side plate 114 may be connected by threaded fasteners. For example, as illustrated in Fig. 4 and Fig. 5, the left and right edges of the front side plate 111 as well as the left and right edges of the rear side plate 112 can be each provided with a mounting flange, and screw holes can be defined in the mounting flanges. In this way, the strength of the front side plate 111 and the rear side plate 112 can be strengthened, and the installation reliability and sealing performance can be improved.
As illustrated in Fig. 5, Fig. 7 and Fig. 8, on the front side plate 111 and the rear side plate 112, the separating gap 401 and two positioning holes 51 are provided from the top to the bottom on the same vertical line along the up-down direction, which can strictly control the fuel gas.
A water heating apparatus according to the embodiments of the present disclosure comprises the burner 100 according to the embodiments of the present disclosure, or the housing 10 of the burner 100 according to the embodiments of the present disclosure. The hot water performance of the water heating apparatus according to the embodiments of the present disclosure is improved.

Claims

A burner (100), comprising:
a housing (10) defining a housing cavity (101), wherein an air inlet (102) is defined in a lower part of the housing (10)¹ and a burning port (103) is defined in an upper part of the housing (10), and the air inlet (102) and the burning port (103) are in communication with the housing cavity (101); and

at least a burner unit (20) arranged in the housing cavity (101), wherein a burning fire hole (201) exposed from the burning port (103) is defined in an upper part of each of the at least one burner unit (20), and an internal gas channel (202) is defined in each of the at least one burner unit (20) to allow a part of air entering from the air inlet (102) to flow to the burning fire hole (201) through the internal gas channel (202),

wherein the burner (100) has an external gas channel (203) provided at an outer side surface of each of the at least one burner unit (20), the external gas channel (203) being in communication with the air inlet (102) and the burning port (103) to allow an other part of the air entering from the air inlet (102) to flow to the burning fire hole (201) through the external gas channel (203),

wherein the housing (10) comprises:
a side enclosing plate (11), wherein an installation space penetrating in the up-down direction is enclosed by the side enclosing plate (11), allowing a burner unit (20) of the burner (100) to be installed in the installation space;

an air distribution plate (12) disposed at and sealing a lower end opening of the installation space and is configured to be located below the burner unit (20),

characterized in that

a first air inlet (1021) and a second air inlet (1022) for air inflow, are defined at the air distribution plate (12) and spaced apart from each other, wherein the first air inlet (1021) is in communication with the internal gas channel (202) in the burner unit (20), the second air inlet (1022) is in communication with the external gas channel (203) located at a side portion of the burner unit (20)².
The burner (100) according to claim 1, wherein the at least one burner unit (20) comprises a plurality of burner units (20) sequentially arranged in a horizontal direction, and along an arrangement direction of the plurality of burner units (20), each of the plurality of burner units (20) has the external gas channel (203) provided on at least a side thereof,
preferably, the external gas channel (203) is provided between and shared by two adjacent burner units (20) of the plurality of burner units (20).
The burner (100) according to claim 1 or 2, wherein the burner unit (20) comprises:
a burner top plate (21), wherein the burning fire hole (201) is provided at the burner top plate (21); and

a burner side plate (22) connected to the burner top plate (21), wherein the internal gas channel (202) is defined by the burner top plate (21) and the burner side plate (22), the external gas channel (203) provided between two adjacent burner units (20) is formed at least by spacing apart two adjacent burner side plates (22), and the external gas channel (203) provided between the burner unit (20) and the housing (10) is formed at least by spacing apart the burner side plate (22) and the housing (10).
The burner (100) according to claim 3, wherein the burner top plate (21) is disposed at and covered an upper part of the burner side plate (22), the burner top plate (21) is provided with an outer flange (211) extending downward, and an outlet of the external gas channel (203) is formed by spacing apart outer flanges (211) of two adjacent burner top plates (21).
The burner (100) according to claim 3 or 4, wherein the burner side plate (22) comprises a first side plate (221) and a second side plate (222), the first side plate (221) and the second side plate (222) are horizontally spliced to form a hollow structure extending in an up-down direction, the burner top plate (21) is disposed at and covered an upper part of the hollow structure, the external gas channel (203) provided between two adjacent burner units (20) is formed at least by spacing apart the first side plate (221) and the second side plate (222) that are adjacent to each other, and the external gas channel (203) provided between the burner unit (20) and the housing (10) is formed at least by spacing apart the housing (10) and either the first side plate (221) or the second side plate (222) whichever is adjacent to the housing (10).
The burner (100) according to any one of claims 1 to 5, further comprising a liquid-cooling pipe (30) extending into the housing (10),
wherein the liquid-cooling pipe (30) is close to the at least one burner unit (20) or is connected to the at least one burner unit (20), and the liquid-cooling pipe (30) is closer to the burning fire hole (201) than an inlet of the internal gas channel (202).
The burner (100) according to one of the preceding claims, wherein the installation space is configured to accommodate a plurality of burner units (20) sequentially arranged along a left-right direction, a plurality of the first air inlets (1021) and a plurality of the second air inlets (1022) are provided, the plurality of the first air inlets (1021) and the plurality of the second air inlets (1022) are alternately arranged along the arrangement direction of the plurality of burner units (20), the plurality of the first air inlets (1021) are in communication with internal gas channels (202) of the plurality of burner units (20) in one-to-one correspondence.
The burner (100) according to one of the preceding claims, wherein the side enclosing plate (11) comprises:
a front side plate (111);

a rear side plate (112), wherein the front side plate (111) and the rear side plate (112) are spaced apart from each other in a front-rear direction;

a left side plate (113) disposed on a left side of the front side plate (111), wherein a front edge and a rear edge of the left side plate (113) are respectively connected to a left edge of the front side plate (111) and a left edge of the rear side plate (112);

a right side plate (114) disposed on a right side of the front side plate (111), wherein a front edge and a rear edge of the right side plate (114) are respectively connected to a right edge of the front side plate (111) and a right edge of the rear side plate (112), wherein two of a lower end of the front side plate (111), a lower end of the rear side plate (112), a lower end of the left side plate (113), and a lower end of the right side plate (114) abut against the air distribution plate (12), the other two of the lower end of the front side plate (111), the lower end of the rear side plate (112), the lower end of the left side plate (113), and the lower end of the rightside plate (114) are connected to the air distribution plate (12) through threads.
The burner according to one of the preceding claims, wherein the side enclosing plate (11) is provided with a separation structure (40) for separating the plurality of burner units (20), the separation structure (40) comprises a separation flange (41) disposed at an upper end of the side enclosing plate (11) and the separation flange (41) extending into the installation space, and the separation flange (41) is configured to abut between two adjacent burner units (20) of the plurality of burner units (20).
The burner (100) according to one of the preceding claims, wherein an outlet of the external gas channel (203) is defined between upper parts of two adjacent burner units (20), a front edge and a rear edge of the upper end of the side enclosing plate (11) are respectively provided with the separation flanges (41), two of the separation flanges (41) cooperate with the plurality of burner units (20) to separate two adjacent outlets.
The burner (100) according to one of the preceding claims, wherein each of the separation flanges (41) comprises a plurality of separation tongues (411) arranged along the left-right direction, two adjacent burner units (20) of the plurality of burner units (20) are separated by one of the plurality of separation tongues (411); one burner unit (20) of the plurality of burner units (20) is disposed between every two separation tongues (411) of the plurality of separation tongues (411), roots of the two adjacent separation tongues (411) are spaced apart from each other to define a separating gap (401) to position the burner unit (20) in the up-down direction.
The burner (100) according to one of the preceding claims, wherein the side enclosing plate (11) is further provided with a positioning structure (50) to position the burner unit (20) in the up-down direction, the positioning structure (50) comprises positioning holes (51) extending along the up-down direction on the side enclosing plate (11); at least one of a front side surface and a rear side surface of the installation space is provided with the positioning holes (51), each burner unit (20) corresponds to at least two positioning holes (51).
The burner (100) according to one of the preceding claims, wherein a lower end of the side enclosing plate (11) is provided with a positioning flange (1101) extending into the installation space and configured to position a bottom of the burner unit (20).
A water heating apparatus, comprising a burner (100) according to any one of claims 1 to 13.