Combustor single body and combustor

Abstract

The utility model belongs to the technical field of heat supply, and particularly discloses a combustor single body and a combustor. The burner single body comprises an inner shell and a fire hole cover, the fire hole cover covers the top end of the inner shell, the fire hole cover and the two opposite outer side walls of the inner shell define flow dividing channels correspondingly, two rows of first fire holes are formed in the top end of the fire hole cover side by side in the first direction, and the two flow dividing channels correspond to the two rows of first fire holes and communicate with the two rows of first fire holes. Airflow holes are formed in the two opposite side walls of the inner shell correspondingly, and the flow dividing channel communicates with the first flame channel through the airflow holes; a plurality of rows of middle fire holes are formed in the fire hole cover, all the middle fire holes are located between the two rows of first fire holes, and the middle fire holes communicate with the upper end openings of the first flame channels. According to the combustor single body and the combustor, the control reliability and the design flexibility of the flow speed of the airflow of the first fire hole are improved, the combustion stability and sufficiency can be improved, and the performance of the combustor and the performance of gas heating equipment are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of combustion, in particular to a burner monomer and a burner. Background Art

[0002] The burner is the core component of gas heating equipment such as gas water heaters and gas wall-mounted boilers. The completeness and stability of its combustion have a crucial impact on the performance of gas heating equipment.

[0003] The existing burners used in gas heating equipment are mostly formed by assembling multiple burner units side by side. In order to reduce the nitrogen oxide emission of the burner unit, a burner unit is provided in the prior art, which includes an inner shell, an outer shell and a fire hole plate, the inner shell has an injection channel and a light flame channel with an open upper end; the fire hole plate is inserted at the upper end opening of the light flame channel, and a light flame hole connected to the light flame channel is opened on the fire hole plate; the outer shell is sleeved on the outer side of the upper end of the inner shell, and a thick flame channel is formed between the inner side wall of the outer shell and the corresponding outer side wall of the inner shell, the lower end of the thick flame channel is connected to the injection channel, and the upper end of the thick flame channel forms a thick flame hole.

[0004] Although the prior art can achieve rich combustion of the burner by setting up light fire holes and rich fire holes, due to the limited size of the burner as a whole in the width direction, the width of the upper opening of the inner shell is limited, which results in the number of rows of light fire holes opened on the fire hole cover being limited, which is not conducive to reducing the flame temperature and heat intensity of a single light fire hole; at the same time, when a plurality of rows of light fire holes are set in the fire hole plate along the width direction, the spacing between two adjacent rows of light fire holes is small, resulting in poor flame combustion stability at the plurality of rows of light fire holes, which is not conducive to achieving stable combustion and easily leads to an increase in nitrogen oxides. Utility Model Content

[0005] One of the technical problems solved by the utility model is to provide a burner unit, which can effectively solve the problems existing in the prior art that the number of rows of fire holes corresponding to the inner shell is limited and the spacing between two adjacent rows of fire holes is small, thereby improving the combustion stability of the burner unit, reducing the combustion temperature at a single fire hole, and reducing the generation of nitrogen oxides.

[0006] The second technical problem solved by the present invention is to provide a burner which can effectively solve the problems of high local flame combustion temperature and low combustion stability in the prior art, improve the combustion stability, reduce the flame temperature at a single fire hole, and reduce the generation of nitrogen oxides.

[0007] The first technical problem mentioned above is solved by the following technical solution:

[0008] A burner unit, characterized in that it comprises an inner shell and a fire hole cover, wherein the inner shell has an introduction channel and a first flame channel inside, the upper end of the first flame channel is open and the lower end is connected to the introduction channel;

[0009] The fire hole cover is arranged at the top of the inner shell and is respectively surrounded by two opposite outer side walls of the inner shell to form a diversion channel. Two rows of first fire holes are arranged side by side along a first direction at the top of the fire hole cover. The two diversion channels are arranged correspondingly to and connected with the two rows of the first fire holes. The opposite side walls of the inner shell are respectively provided with air flow holes, and the diversion channels are connected with the first flame channels through the air flow holes. The first direction is the width direction of the burner unit.

[0010] The fire hole cover is provided with a plurality of rows of intermediate fire holes, all of which are located between two rows of the first fire holes, and the intermediate fire holes are openly connected to the upper end of the first flame channel.

[0011] Compared with the background technology, the burner monomer of the utility model has the following beneficial effects: by setting the fire hole cover at the upper end of the inner shell and enclosing the two opposite outer side walls of the inner shell to form a diversion channel, the mixed gas flowing to the upper end of the first flame channel will be diverted to the diversion channels on both sides and the upper end opening of the first flame channel, and flow out through the two rows of first fire holes and several rows of middle fire holes respectively, so that the first flame channel corresponds to at least three rows of fire holes, realizes the diversion of the mixed gas in the first flame channel, increases the number of rows of fire holes corresponding to the first flame channel, improves the combustion stability, reduces the combustion temperature and heat at a single fire hole, and thus reduces the generation of nitrogen oxides; at the same time, because the diversion channel is set on the outer side of the inner shell, the size of the fire hole cover in the first direction is larger than the size of the inner shell in the first direction, and the distance between two adjacent rows of fire holes on the fire hole cover can be enlarged, thereby effectively reducing the interference of the two adjacent rows of fire holes during combustion, and further improving the combustion stability; further, the setting of the diversion channel is conducive to rectifying the mixed gas flowing out of the first fire hole, thereby further improving the combustion stability.

[0012] In one embodiment, the burner unit also includes a rectifying assembly, which is inserted into the first flame channel, and the rectifying assembly separates the upper part of the first flame channel into at least two rectifying flow channels arranged side by side in the first direction, the air flow holes are connected with the adjacent rectifying flow channels, the number of the rectifying flow channels is the same as the number of rows of the intermediate fire holes, and the upper end of each of the rectifying flow channels is connected with the intermediate fire holes in the corresponding row.

[0013] In one of the embodiments, the rectifier assembly includes two rectifier main boards which are arranged opposite to each other and spaced apart in a first direction, and the rectifier flow channel is formed between the two rectifier main boards and between each rectifier main board and the inner side wall of the adjacent inner shell.

[0014] In one embodiment, the rectifier assembly includes two rectifier mainboards arranged relative to each other in a first direction, the upper parts of the two rectifier mainboards are vertically arranged and relatively fitted, the lower parts of the two rectifier mainboards are relatively open, and the outer side surface of each rectifier mainboard forms a rectifier flow channel with the inner wall of the adjacent inner shell.

[0015] In one of the embodiments, a ventilation hole is provided at the lower portion of each of the rectifier mainboards, and the flow channel between the lower portions of the two rectifier mainboards is connected with the two outer rectifier flow channels through the ventilation hole.

[0016] In one embodiment, the air flow holes and the ventilation holes are both arranged in a plurality along the second direction, and in the second direction, the air flow holes and the ventilation holes are arranged one-to-one, the opening area of ​​the air flow holes is S1, and the opening area of ​​the corresponding ventilation holes is S2, S2>1.5S1, and the second direction is the length direction of the burner unit;

[0017] And / or, each of the rectifier main boards includes a first rectifier plate portion, a diverter plate portion, and a second rectifier plate portion that are bent and connected in sequence from top to bottom, the first rectifier plate portion and the second rectifier plate portion are both vertically arranged, and the first rectifier plate portions of the two rectifier main boards are arranged in close proximity, the two diverter plate portions extend obliquely from top to bottom in a direction away from each other, and each of the diverter plate portions is provided with the vent hole.

[0018] In one embodiment, the fire hole cover comprises a fire hole plate, which is arranged at the upper end of the inner shell and is provided with the first fire hole and the middle fire hole, and the fire hole plate is bent downward in sequence on opposite sides along the first direction to be connected with a vertical plate portion, a side inclined plate portion and an abutting plate portion, the vertical plate portion and the abutting plate portion are both vertically arranged, the side inclined plate portion is inclined from top to bottom in a direction toward the other inner shell, the abutting plate portion is fitted with an outer side surface of the inner shell, and the fire hole plate, the vertical plate portion, the side inclined plate portion and the outer side surface of the inner shell are surrounded to form the diversion channel;

[0019] And / or, the inner shell body includes two inner half shells arranged opposite to each other in the first direction, the two inner half shells together form the first flame channel and the injection channel, the upper part of each inner half shell includes a shell rectifying part, a shell inclined part and a shell assembly part which are bent and connected from bottom to top, the shell rectifying part and the shell assembly part are both vertically arranged, the shell inclined part is inclined from top to bottom in a direction away from the other inner half shell, and the shell inclined part is provided with the air flow hole, the lower end of the fire hole cover is in contact with the outer side surface of the shell assembly part, and the fire hole cover, the shell rectifying part and the shell inclined part together form the diversion channel.

[0020] In one embodiment, the burner unit further comprises an outer shell, the outer shell is sleeved on the upper end of the inner shell, and a second flame channel is formed between the inner side wall of the outer shell and the two opposite outer sides of the fire hole cover, the upper end of the second flame channel is open and forms a second fire hole, the lower end of the second flame channel is connected to the injection channel, and the air-fuel ratio of the premixed gas in the second flame channel is different from that in the first flame channel;

[0021] And / or, each row of the first fire holes includes a plurality of the first fire holes spaced apart along a first direction, and each row of the intermediate fire holes includes a plurality of the intermediate fire holes spaced apart along the first direction, and in the second direction, the intermediate fire holes and the first fire holes are arranged one by one, the first direction is the length direction of the burner unit, and the second direction is the width direction of the burner unit.

[0022] In one embodiment, the injection channel includes a first injection channel and a second injection channel separated from each other, the lower end of the first flame channel is connected to the first injection channel, the second injection channel is connected to the second flame channel, and the first injection channel and the second injection channel respectively inject premixed gases with different air-fuel ratios.

[0023] The above second technical problem is solved by the following technical solution:

[0024] A burner comprises the burner unit in any one of the above embodiments.

[0025] Compared with the background technology, the burner of the utility model has the following beneficial effects: by adopting the above-mentioned burner monomer, the combustion stability of the burner can be improved, the nitrogen oxides generated by combustion can be reduced, and the use performance of the burner can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of a burner unit provided in the first embodiment of the present utility model;

[0027] Figure 2 for Figure 1 A partial enlarged view of point I in the middle;

[0028] Figure 3 A schematic diagram of the disassembled structure of the partial structure of the burner monomer provided in the first embodiment of the utility model;

[0029] Figure 4 A partial cross-sectional view of a burner unit provided in Embodiment 1 of the present utility model;

[0030] Figure 5 A schematic diagram of the disassembled structure of the burner monomer part structure provided in the second embodiment of the utility model;

[0031] Figure 6 The burner monomer provided for the second embodiment of the utility model is a cross-sectional view;

[0032] Figure 7 for Figure 6 A partial enlarged view of the J in the middle.

[0033] Description of labels:

[0034] 1. Fire hole cover; 11. Fire hole plate; 111. First fire hole; 112. Middle fire hole; 12. Side surrounding plate; 121. Vertical plate portion; 122. Side inclined plate portion; 123. Abutting plate portion;

[0035] 2. Rectification assembly; 21. Rectification main board; 211. First rectifier plate; 212. Diverter plate; 213. Second rectifier plate; 214. Diverter profile; 215. Rectification profile; 216. Rectification rib; 22. Ventilation hole;

[0036] 3. Inner shell; 31. Inner half shell; 311. Shell rectifying part; 312. Shell tilting part; 313. Shell assembly part; 314. Communication hole; 315. Air flow hole; 32. First injection channel; 33. Second injection channel; 34. First flame channel; 341. Rectifying flow channel; 341a. Upper sub-flow channel; 341b. Lower sub-flow channel;

[0037] 4. outer shell; 51. outer half shell; 52. connecting bridge;

[0038] 6. Diversion channel; 7. Second flame channel; 8. Second flame hole. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0041] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0042] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] Embodiment 1

[0044] The present embodiment provides a burner unit, which can be used in a burner, and which can realize rich and lean combustion while controlling the speed at which the premixed gas flows out of the fire hole by rectifying the premixed gas in the flame channel, thereby improving the combustion completeness and stability and reducing the generation of nitrogen oxides and CO during the combustion process.

[0045] For the convenience of description, the width direction of the burner unit is defined as a first direction, and the length direction is defined as a second direction. The first direction is perpendicular to the second direction, and the first direction and the second direction are perpendicular to the vertical direction.

[0046] like Figures 1 to 4As shown, in this embodiment, the burner monomer includes an inner shell 3, an outer shell 4 and a fire hole cover 1. The inner shell 3 has an ejection channel and a first flame channel 34, the upper end of the first flame channel 34 is open and the lower end is connected to the ejection channel. The fire hole cover 1 is covered on the top of the inner shell 3 and is respectively surrounded by the two opposite outer side walls of the inner shell 3 to form a diversion channel 6. The top of the fire hole cover 1 is provided with two rows of first fire holes 111 arranged side by side along the first direction. The two diversion channels 6 are arranged one by one with the two rows of first fire holes 111, and the upper end of each diversion channel 6 is connected with the first fire holes 111 of the corresponding row. The opposite side walls of the inner shell 3 are respectively provided with airflow holes 315, and the diversion channel 6 is connected with the first flame channel 34 through the airflow holes 315; a plurality of rows of intermediate fire holes 112 are provided on the fire hole cover 1, all of which are located between the two rows of first fire holes 111, and the intermediate fire holes 112 are openly connected with the upper end of the first flame channel 34. The outer shell 4 is sleeved on the upper end of the inner shell 3, and the inner wall of the outer shell 4 and the two opposite outer sides of the fire hole cover 1 respectively enclose a second flame channel 7, the upper end of the second flame channel 7 is open and forms a second fire hole 8, the lower end of the second flame channel 7 is connected to the induced injection channel, and the air-fuel ratio of the premixed gas in the second flame channel 7 and the first flame channel 34 is different.

[0047] The burner monomer provided in this embodiment forms a diversion channel 6 by setting the fire hole cover 1 on the upper end of the inner shell 3 and enclosing the diversion channel 6 with the two opposite outer side walls of the inner shell 3, so that the mixed gas flowing to the upper end of the first flame channel 34 will be diverted to the diversion channels 6 on both sides and the upper open end of the first flame channel 34, and flow out through the two rows of first fire holes 111 and several rows of middle fire holes 112 respectively, so that the first flame channel 34 corresponds to at least three rows of fire holes, realizing the diversion of the mixed gas in the first flame channel 34, increasing the number of rows of fire holes corresponding to the first flame channel 34, and improving the combustion efficiency. High combustion stability reduces the combustion temperature and heat at a single fire hole, thereby reducing the generation of nitrogen oxides; at the same time, since the diverter channel 6 is arranged on the outside of the inner shell 3, the size of the fire hole cover 1 in the first direction is larger than the size of the inner shell 3 in the first direction, and the distance between two adjacent rows of fire holes on the fire hole cover 1 can be made larger, thereby effectively reducing the interference between the two adjacent rows of fire holes during combustion, and further improving the combustion stability; further, the setting of the diverter channel 6 is conducive to rectifying the mixed gas flowing out of the first fire hole 111, thereby further improving the combustion stability.

[0048] At the same time, the burner unit provided in the present embodiment has a different air-fuel ratio of the premixed gas in the first flame channel 34 and the second flame channel 7, so that the first fire hole 111 and the middle fire hole 112 form a rich-lean combustion with the second fire hole 8, thereby reducing the content of nitrogen oxides produced by the combustion and improving the completeness of the combustion; furthermore, since the fire hole cover 1 is arranged on the outer side of the upper end of the inner shell 3, and the air flow hole 315 is arranged on the inner shell 3, the length and verticality of the vertical channel at the upper end of the second flame channel 7 can be controlled by the structural setting and processing precision control of the fire cover, which is beneficial to control the flame combustion temperature and further control the emission of harmful gases.

[0049] It is worth noting that one of the first fire hole 111 and the second fire hole 8 is a light flame hole, and the other is a rich flame hole, so as to realize the rich and light combustion of the burner unit, and the type of the middle fire hole 112 is the same as the type of the first fire hole 111. Light flame combustion requires more air, and rich flame combustion requires relatively less air, that is, the air-fuel ratio of the premixed gas in the light flame hole is greater than the air-fuel ratio of the premixed gas in the rich flame hole. As a result, the light flame burns under excessive air, and the light flame is wrapped by excessive air to reduce the temperature, while the rich flame is incompletely burned under oxygen-deficient conditions to reduce the temperature of the rich flame, thereby reducing the flame temperature as a whole, and then reducing the generation of nitrogen oxides; at the same time, since the two second flame holes are located on both sides of the first flame hole, the fuel that is not fully burned in the rich flame can be further burned with the excess air in the light flame, thereby ensuring the full combustion of the fuel, reducing CO emissions while improving the utilization rate of the gas.

[0050] In one embodiment, the first fire hole 111 and the middle fire hole 112 are light flame holes, and the second fire hole 8 is a rich flame hole. In other embodiments, the first fire hole 111 and the middle fire hole 112 may be rich flame holes, and the second fire hole 8 may be a light flame hole. In other embodiments, the burner unit may not be provided with an outer shell 4.

[0051] In one embodiment, the ejection channel includes a first ejection channel 32 and a second ejection channel 33, and the first ejection channel 32 and the second ejection channel 33 are respectively formed with ejection ports on the same side of the burner unit. The lower end of the first flame channel 34 is connected to the first ejection channel 32, and the lower end of the second flame channel 7 is connected to the second ejection channel 33. The air-fuel ratio of the premixed gas ejected by the first ejection channel 32 and the second ejection channel 33 is different. By separately setting the first ejection channel 32 and the second ejection channel 33, it is beneficial to control the amount of gas entering the first ejection channel 32 and the second ejection channel 33 respectively, and then control the air-fuel ratio in the first flame channel 34 and the second flame channel 7, thereby improving the flexibility of air-fuel ratio regulation.

[0052] In another embodiment, the inner shell 3 may be provided with only one injection channel, that is, the lower ends of the first flame channel 34 and the second flame channel 7 are connected to the same injection channel, and an air hole is provided on the outer wall of the outer shell 4, and the air hole is connected to the corresponding second flame channel 7, so that external air can pass through the air hole and then into the second flame channel 7, thereby mixing with the premixed gas entering the second flame channel 7, increasing the air amount of the premixed gas in the second flame channel 7, so that the air-fuel mixture of the premixed gas in the second flame channel 7 and the first flame channel 34 is different.

[0053] It is understandable that there are many configurations in the prior art to achieve different air-fuel ratios in the first flame channel 34 and the second flame channel 7, and all of them can be applied to the present invention, and the present invention does not limit or elaborate on them.

[0054] The outer shell 4 includes two outer half shells 51 arranged opposite to each other in the first direction. The two outer half shells 51 are respectively located on the outside of the two inner half shells 31, and each outer half shell 51 forms a second flame channel 7 with the corresponding outside of the fire hole cover 1. The second introduction channel 33 is respectively provided with a plurality of connecting holes 314 along the two channel walls in the first direction, and the second introduction channel 33 is respectively connected with the two second flame channels 7 through the connecting holes 314 on both sides. Furthermore, a connecting bridge 52 is connected between the upper ends of the two outer half shells 51, and the connecting bridge 52 is located above the fire hole cover 1 and is arranged in plurality along the second direction to ensure the spacing between the upper ends of the two outer half shells 51.

[0055] The two inner half shells 31 are press-fitted at both ends along the second direction and sandwiched between the corresponding ends of the two outer half shells 51. It is worth noting that the manner and specific structure of the two inner half shells 31 enclosing and forming the first injection channel 32, the second injection channel 33 and the first flame channel 34 can be set with reference to the prior art, and the connection between the outer shell 4 and the inner shell 3 can be set with reference to the prior art, which is not the focus of the present utility model and will not be described in detail this time.

[0056] In one embodiment, each row of first fire holes 111 includes a plurality of first fire holes 111 spaced apart along the second direction, and each row of intermediate fire holes 112 includes a plurality of intermediate fire holes 112 spaced apart along the second direction. In the second direction, the intermediate fire holes 112 and the first fire holes 111 are arranged one-to-one, and the second direction is the width direction of the burner unit. This can reduce the difficulty of processing the fire hole cover 1 and facilitate the stability of combustion. In other embodiments, the first fire hole 111 and the second fire hole 8 may also be arranged non-correspondingly in the second direction, and the flow into the intermediate fire hole 112 may be a long strip hole extending along the second direction, and one intermediate fire hole 112 corresponds to a plurality of first fire holes 111 arranged side by side along the second direction.

[0057] In this embodiment, the first fire hole 111 and the middle fire hole 112 are both long strip structures extending along the first direction. In other embodiments, the first fire hole 111 and the middle fire hole 112 may also be elliptical, circular or other shapes. Further, on the horizontal projection plane, the connecting bridge 52 is located between two adjacent fire hole groups.

[0058] In order to reduce the difficulty of processing the air flow holes 315 , in one embodiment, a plurality of air flow holes 315 are arranged at intervals along the second direction, and the air flow holes 315 are rectangular long holes extending along the second direction.

[0059] In order to improve the molding convenience of the diversion channel 6, in the present embodiment, the fire hole cover 1 includes a fire hole plate 11 and side panels 12 connected to the opposite sides of the fire hole plate 11, the fire hole plate 11 is covered on the upper end of the inner shell body 3, and a first fire hole 111 is provided on the fire hole plate 11; the side panels 12 are located on the outer side of the inner shell body 3, and the upper end of the side panels 12 is connected to the fire hole plate 11, and the lower end of the side panels 12 is abutted against the outer side wall of the inner shell body 3, so that the side panels 12, the fire hole plate 11 and the outer side wall of the inner shell body 3 are arranged to form the above-mentioned diversion channel 6.

[0060] The side panel 12 includes a vertical plate portion 121, a side inclined plate portion 122 and an abutment plate portion 123 which are bent and connected in sequence. The vertical plate portion 121 is opposite to and spaced apart from the upper end of the inner shell body 3, and the vertical plate portion 121 is spaced apart from the inner side wall of the outer shell body 4; the abutment plate portion 123 is in contact with the outer side of the inner shell body 3, and the air flow hole 315 is arranged opposite to the side inclined plate portion 122. Since the airflow hole 315 is arranged opposite to the side inclined plate portion 122, the airflow entering the diversion channel 6 from the airflow hole 315 flows upward under the guidance of the side inclined plate portion 122, thereby achieving the effect of diversion; by setting the vertical vertical plate portion 121, the premixed gas entering the diversion channel 6 can be rectified, so as to better ensure that the airflow can flow vertically upward out of the first fire hole 111; at the same time, this arrangement gradually increases the distance between the vertical plate portion 121, the side inclined plate portion 122 and the abutting plate portion 123 and the outer shell 4, so that the size of the second fire hole 8 can be controlled by the distance between the vertical plate portion 121 and the outer shell 4, and the airflow flowing to the second fire hole 8 can be rectified, and at the same time, when the airflow flows to the second fire hole 8, the relative narrowing of the upper part of the second flame channel 7 can enhance the flow speed of the airflow flowing out of the second fire hole 8 to avoid backfire.

[0061] In this embodiment, the upper part of each inner half shell 31 includes a shell rectifying portion 311, a shell inclined portion 312 and a shell assembly portion 313 which are bent and connected in sequence from top to bottom. The shell rectifying portion 311 and the shell assembly portion 313 are both provided, and the shell inclined portion 312 extends obliquely from top to bottom in a direction away from the other inner half shell 31. The shell rectifying portion 311 is parallel to the vertical plate portion 121 and is arranged at intervals. The airflow hole 315 is provided on the shell inclined portion 312, and the abutting plate portion 123 abuts against the outer side surface of the shell assembly portion 313. By providing the airflow hole 315 on the shell inclined portion 312, the gas entering the diversion channel 6 from the airflow hole 315 has an upward movement component, guiding the premixed gas to flow upward, and ensuring the smoothness of the premixed gas outlet.

[0062] In one embodiment, a plurality of rows of intermediate fire holes 112 are provided on the fire hole cover 1, and all the intermediate fire holes 112 are located between two rows of first fire holes 111. Each row of intermediate fire holes 112 includes a plurality of intermediate fire holes 112 arranged at intervals along the second direction, and the intermediate fire holes 112 are openly connected to the upper end of the first flame channel 34. This arrangement enables the fire hole cover 1 to divide the premixed gas flowing out of the first flame channel 34 into multiple air flows flowing outward in the first direction, thereby reducing the flow rate of the premixed gas flowing out of a single fire hole, reducing the flame temperature at a single fire hole, and enhancing the stability of the air flow of a single fire hole.

[0063] In order to improve the stability of combustion, in this embodiment, the inner core component also includes a rectifying component 2, which is inserted in the upper part of the first flame channel 34. The rectifying component 2 separates the upper part of the first flame channel 34 into at least two rectifying flow channels 341 arranged side by side in the width direction, and the air flow hole 315 is connected to the adjacent rectifying flow channels 341. By providing the rectifying component 2, the flow of the premixed gas in the first flame channel 34 can be rectified, so that the premixed gas flowing to the air flow hole 315 is a rectified air flow, reducing the probability of turbulence in the first flame channel 34, and improving the stability of the flame combustion at the first flame hole 111.

[0064] The number of rows of the intermediate fire holes 112 is the same as the number of the rectifying flow channels 341, and the upper end of each rectifying flow channel 341 is connected to the corresponding row of intermediate fire holes 112. By using the rectifying component 2 to divide the first flame channel 34 into a plurality of rectifying flow channels 341, the airflow in the first flame channel 34 can be rectified, the probability of turbulence and the like when the airflow flows is reduced, the airflow velocity is slowed down, and the combustion stability of the flame at the intermediate fire hole 112 is improved; by setting the intermediate fire hole 112, the number of fire holes on the burner unit can be increased, the flame area can be increased, the heat load at a single fire hole can be reduced, and the use safety and reliability of the fire hole cover 1 and the burner unit can be improved. At the same time, the heat dissipation area of ​​the flame at a single fire hole can also be increased to avoid the generation of local height, thereby reducing the generation of nitrogen oxides during the combustion process.

[0065] In this embodiment, the rectifying assembly 2 includes two rectifying main boards 21 arranged at intervals along the first direction, and the two rectifying main boards 21 divide the first flame channel 34 into three rectifying flow channels 341 along the first direction; rectifying flow channels 341 are formed between the two rectifying main boards 21 and between each rectifying main board 21 and the inner side wall of the adjacent inner shell 3. This rectifying assembly 2 has a simple structure, is easy to process, and has a good rectifying effect.

[0066] The lower end of the rectifying main board 21 extends to the lower part of the first flame channel 34, so as to increase the effective range of the rectifying main board 21 in the first flame channel 34 and improve the rectifying effect on the gas when the height of the first flame channel 34 remains unchanged. Preferably, the ratio of the length of the rectifying main board 21 in the vertical direction to the length of the first flame channel 34 in the vertical direction is 0.5 to 0.95, and more preferably 0.7 to 0.9.

[0067] Furthermore, the two rectifier mainboards 21 are pressed in the direction toward each other to form a diverter profile 214, and a plurality of diverter profiles 214 are arranged at intervals along the second direction, and the diverter profiles 214 on the two rectifier mainboards 21 are arranged one by one and offset. In the second direction, each diverter profile 214 is located between two fire hole groups, so that when the airflow flows through the diverter profile 214 from bottom to top, it will flow to both sides of the diverter profile 214 along the second direction to achieve the function of guiding and rectifying the airflow, further improving the air outlet stability at the middle fire hole 112, thereby improving the flame combustion stability at the middle fire hole 112; at the same time, the setting of the diverter profile 214 can enhance the structural strength and rigidity of the rectifier mainboard 21 and reduce the probability of deformation of the rectifier mainboard 21; further, the two diverter profiles 214 arranged relatively to each other are partially offset, which is conducive to controlling the spacing between the two rectifier mainboards 21 and ensuring the reliability of the relative position between the two rectifier mainboards 21.

[0068] The flow splitter profiles 214 are arranged in two rows along the vertical direction, and each row includes a plurality of flow splitter profiles 214 arranged at intervals along the second direction. In this embodiment, the flow splitter profiles 214 located in the upper row are in the shape of long strips extending in the vertical direction, and the upper end is close to or located at the upper end of the rectifier main board 21 to better guide the airflow to flow to both sides of the flow splitter profiles 214; the flow splitter profiles 214 located in the lower row are circular structures to reduce the occupied space, and cooperate with the flow splitter profiles 214 in the upper row to achieve better flow splitting.

[0069] The two rectifier main boards 21 are pressed in the direction toward each other to form a rectifier profile 215, and two rectifier profiles 215 are arranged at intervals along the second direction, and the rectifier profiles 215 and the diverter profiles 214 are staggered and arranged at intervals in the second direction. By setting the rectifier profile 215, the airflow between the two diverter profiles 214 can be rectified, the airflow velocity can be slowed down, and the airflow flow stability can be improved to avoid mutual collision between the airflows due to the airflow being diverted between the two diverter profiles 214 units. The rectifier profile 215 is preferably a long strip structure extending in the vertical direction, and in the second direction, the rectifier profile 215 is located in the middle of the diverter profile 214.

[0070] Embodiment 2

[0071] The present embodiment provides a burner unit, a burner including the burner unit, and a gas heating device including the burner. The burner unit provided in the present embodiment is basically the same as the burner unit provided in the first embodiment, with only some differences in the settings. The present embodiment will no longer repeat the same structure as the first embodiment.

[0072] like Figures 5 to 7 As shown, the rectifier assembly 2 includes two rectifier mainboards 21 arranged opposite to each other in the width direction, the upper parts of the two rectifier mainboards 21 are fitted together, and the lower parts of the two rectifier mainboards 21 are relatively open. The outer side surface of each rectifier mainboard 21 forms a rectifier flow channel 341 with the inner wall of the adjacent inner shell 3, and the lower part of each rectifier mainboard 21 is provided with a vent hole 22, and a plurality of vent holes 22 are arranged at intervals along the length direction.

[0073] That is, in the rectifier assembly 2 provided in this embodiment, the upper part of the first flame channel 34 is divided by two rectifier main boards 21 to form two upper sub-channels 341a, and the lower part of the first flame channel 34 is divided by two rectifier main boards 21 to form three lower sub-channels 341b, wherein the two lower sub-channels 341b on both sides are respectively connected to the upper sub-channels 341a on the corresponding sides to form a rectifier channel 341, and the lower sub-channel 341b located between the lower parts of the two rectifier main boards 21 is respectively connected to the rectifier channel 341 on the corresponding sides through the air holes 22 on both sides.

[0074] Due to the relative position of the two rectifying main boards 21, the lower part of the first flame channel 34 is separated into three lower sub-flow channels 341b, which can improve the rectifying effect of the airflow flowing into the first flame channel 34, reduce the probability of the airflow generating turbulence and other problems in the first flame channel 34, and stabilize the airflow velocity; since the middle lower sub-flow channel 341b is connected with the corresponding side rectifying flow channel 341a through the air vent 22, the flow rate and flow velocity of the outer lower sub-flow channel 341b and the middle lower sub-flow channel 341b to the upper sub-flow channel 341a can be controlled by controlling the opening area of ​​the air vent 22, so as to further control the flow rate and flow velocity of the air flow hole 315 flowing to the corresponding side, and improve the flow control effect of the corresponding first flame hole 111.

[0075] In this embodiment, each rectifier main board 21 includes a first rectifier plate portion 211, a diverter plate portion 212, and a second rectifier plate portion 213 that are bent and connected in sequence from top to bottom. The first rectifier plate portion 211 and the second rectifier plate portion 213 are both vertically arranged, and the first rectifier plate portions 211 of the two rectifier main boards 21 are arranged in close contact, and the two diverter plate portions 212 extend obliquely from top to bottom in a direction away from each other, and each diverter plate portion 212 is provided with a vent hole 22. This arrangement is conducive to reducing the difficulty of processing the rectifier main board 21.

[0076] Two rows of intermediate fire holes 112 are provided at the upper end of the fire hole cover 1 along the first direction, and the two rows of intermediate fire holes 112 are respectively arranged in one-to-one correspondence with the two upper sub-flow channels 341a, that is, the upper end of each upper sub-flow channel 341a is connected to the corresponding intermediate fire hole 112, so that part of the airflow in the upper sub-flow channel 341a enters the diversion channel 6 through the airflow hole 315 and then flows to the first fire hole 111, and part of the airflow flows to the intermediate fire hole 112 through the upper end of the upper sub-flow channel 341a, thereby increasing the number of fire holes on the fire hole cover 1, increasing the flame area, and reducing the heat load of a single fire hole; at the same time, by arranging the intermediate fire hole 112 between the two rows of first fire holes 111, the flames at the first fire holes 111 on both sides can stabilize the flames at the intermediate fire hole 112, thereby improving the stability of flame combustion and reducing the production of nitrogen oxides during combustion.

[0077] To improve the effect and accuracy of flow rate control, the air holes 315 on the same side are arranged in one-to-one correspondence with the vent holes 22, so that the vent holes 22 control the air flow rate and air flow rate of the corresponding air holes 315. The vent holes 22 are preferably long strip holes extending along the second direction.

[0078] The opening area of ​​the air flow hole 315 is S1, and the opening area of ​​a single air hole 22 is S2. Preferably, S2≥1.5S, and more preferably, S2≥2S1, to ensure that the premixed gas with sufficient flow rate is introduced into the upper sub-channel 341a, so as to ensure that the air flow in the upper sub-channel 341a can be distributed to the corresponding first fire hole 111 and the middle fire hole 112.

[0079] In order to reduce the difficulty of processing the rectifier assembly 2 , in this embodiment, the upper ends of the two first rectifier plate portions 211 are bent and connected, so that the two rectifier main plates 21 are integrally formed by one sheet metal part.

[0080] Furthermore, the two first rectifying plate portions 211 are provided with rectifying ribs 216 in directions away from each other, and a plurality of rectifying ribs 216 are arranged at intervals along the second direction. In the second direction, each rectifying rib 216 is located between two fire hole groups to guide the airflow passing through the rectifying rib 216 to flow to both sides of the rectifying rib 216, that is, to guide the airflow to flow to the middle fire hole 112 on both sides of the rectifying rib 216, reduce the problem of airflow chaos caused by the airflow upwardly hitting the fire hole cover 1, improve the air outlet stability at the middle fire hole 112, and thus improve the flame stability at the middle fire hole 112.

[0081] The rectifying rib 216 is a long strip structure extending in the vertical direction, and the ratio of the height of the rectifying rib 216 in the vertical direction to the height of the first rectifying plate portion 211 in the vertical direction is 0.6-0.95.

[0082] In the specific contents of the above-mentioned specific implementation methods, each technical feature can be combined in any non-contradictory way. In order to make the description concise, all possible combinations of the above-mentioned technical features are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. The specific contents of the above-mentioned specific implementation methods only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as a limitation on the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the utility model, several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A burner unit, characterized in that: It comprises an inner shell (3) and a fire hole cover (1), wherein the inner shell (3) has an introduction channel and a first flame channel (34) inside, and the first flame channel (34) is open at the upper end and communicates with the introduction channel at the lower end; The fire hole cover (1) is arranged on the top of the inner shell (3) and is respectively surrounded by two opposite outer side walls of the inner shell (3) to form a diversion channel (6); two rows of first fire holes (111) are arranged side by side at the top of the fire hole cover (1) along a first direction; the two diversion channels (6) are arranged correspondingly to and communicate with the two rows of first fire holes (111); air flow holes (315) are respectively opened on the opposite side walls of the inner shell (3), and the diversion channel (6) is communicated with the first flame channel (34) through the air flow holes (315); the first direction is the width direction of the burner unit; The fire hole cover (1) is provided with a plurality of rows of intermediate fire holes (112), all of the intermediate fire holes (112) are located between two rows of the first fire holes (111), and the intermediate fire holes (112) are openly connected to the upper end of the first flame channel (34).

2. The burner unit according to claim 1, characterized in that: The burner unit also includes a rectifying component (2), the rectifying component (2) is inserted into the first flame channel (34), and the rectifying component (2) separates the upper part of the first flame channel (34) into at least two rectifying flow channels (341) arranged side by side in the first direction, the air flow hole (315) is connected with the adjacent rectifying flow channels (341), the number of the rectifying flow channels (341) is the same as the number of rows of the intermediate flame holes (112), and the upper end of each rectifying flow channel (341) is connected with the intermediate flame holes (112) in the corresponding row.

3. The burner unit according to claim 2, characterized in that: The rectifier assembly (2) comprises two rectifier main boards (21) arranged opposite to each other and spaced apart in a first direction, and the rectifier flow channel (341) is formed between the two rectifier main boards (21) and between each rectifier main board (21) and the inner side wall of the adjacent inner shell (3).

4. The burner unit according to claim 2, characterized in that: The rectifier assembly (2) comprises two rectifier mainboards (21) arranged opposite to each other in a first direction, the upper parts of the two rectifier mainboards (21) are arranged vertically and relatively close to each other, the lower parts of the two rectifier mainboards (21) are relatively open, and the outer side surface of each rectifier mainboard (21) forms a rectifier flow channel (341) with the inner side wall of the adjacent inner shell (3).

5. The burner unit according to claim 4, characterized in that: A vent hole (22) is provided at the bottom of each rectifier main plate (21), and the flow channel between the bottoms of the two rectifier main plates (21) is connected to the rectifier flow channels (341) on the two outer sides through the vent hole (22).

6. The burner unit according to claim 5, characterized in that: A plurality of the air flow holes (315) and the air vent holes (22) are arranged at intervals along the second direction, and in the second direction, the air flow holes (315) and the air vent holes (22) are arranged one-to-one correspondingly, the opening area of ​​the air flow holes (315) is S1, and the corresponding opening area of ​​the air vent holes (22) is S2, S2>1.5S1, and the second direction is the length direction of the burner unit; And / or, each of the rectifier main boards (21) comprises a first rectifier plate portion (211), a diverter plate portion (212) and a second rectifier plate portion (213) which are bent and connected in sequence from top to bottom, the first rectifier plate portion (211) and the second rectifier plate portion (213) are both vertically arranged, and the first rectifier plate portions (211) of the two rectifier main boards (21) are arranged in close contact, the two diverter plate portions (212) extend obliquely from top to bottom in a direction away from each other, and each of the diverter plate portions (212) is provided with the vent hole (22).

7. The burner monomer according to any one of claims 1 to 6, characterized in that: The fire hole cover (1) comprises a fire hole plate (11), the fire hole plate (11) is covered on the upper end of the inner shell (3) and is provided with the first fire hole (111) and the middle fire hole (112); the fire hole plate (11) is bent downward in sequence on two opposite sides along the first direction to be connected with a vertical plate portion (121), a side inclined plate portion (122) and an abutting plate portion (123); the vertical plate portion (121) and the abutting plate portion (123) are both vertically arranged; the side inclined plate portion (122) is inclined from top to bottom in a direction toward the other inner shell (3); the abutting plate portion (123) is in contact with the outer side surface of the inner shell (3); the fire hole plate (11), the vertical plate portion (121), the side inclined plate portion (122) and the outer side surface of the inner shell (3) are surrounded to form the diversion channel (6); And / or, the inner shell (3) comprises two inner half shells (31) arranged opposite to each other in the first direction, the two inner half shells (31) together form the first flame channel (34) and the injection channel, the upper part of each inner half shell (31) comprises a shell rectifying portion (311), a shell inclined portion (312) and a shell assembly portion (313) bent and connected from bottom to top, the shell rectifying portion (311) and the shell assembly portion (313) are both arranged vertically, the shell inclined portion (312) is inclined from top to bottom in a direction away from the other inner half shell (31), and the shell inclined portion (312) is provided with the air flow hole (315), the lower end of the fire hole cover (1) is in contact with the outer side surface of the shell assembly portion (313), and the fire hole cover (1), the shell rectifying portion (311) and the shell inclined portion (312) together form the diversion channel (6).

8. The burner monomer according to any one of claims 1 to 6, characterized in that: The burner unit further comprises an outer shell (4), the outer shell (4) being sleeved on the upper end of the inner shell (3), and a second flame channel (7) is respectively formed between the inner side wall of the outer shell (4) and the two opposite outer sides of the fire hole cover (1), the upper end of the second flame channel (7) is open and forms a second fire hole (8), the lower end of the second flame channel (7) is connected to the injection channel, and the air-fuel ratio of the premixed gas in the second flame channel (7) and the first flame channel (34) is different; And / or, each row of the first fire holes (111) includes a plurality of the first fire holes (111) spaced apart along a second direction, and each row of the intermediate fire holes (112) includes a plurality of the intermediate fire holes (112) spaced apart along the second direction, and in the second direction, the intermediate fire holes (112) and the first fire holes (111) are arranged in one-to-one correspondence, and the second direction is the width direction of the burner unit.

9. The burner unit according to claim 8, characterized in that: The ejection channel comprises a first ejection channel (32) and a second ejection channel (33) which are separated from each other. The lower end of the first flame channel (34) is connected to the first ejection channel (32), and the second ejection channel (33) is connected to the second flame channel (7). The first ejection channel (32) and the second ejection channel (33) respectively eject premixed gases with different air-fuel ratios.

10. A burner, characterized in that: It comprises a burner monomer as described in any one of claims 1 to 9.

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