Burner with source noise reduction function

Abstract

The utility model discloses a source noise reduction combustor which comprises a combustor shell, and a combustion cavity is formed in the combustor shell. The combustor shell is provided with a fuel gas channel and an air channel, and the air channel and the fuel gas channel are both communicated with the combustion cavity. The combustion assembly comprises a gas distribution pipe, a gas nozzle and a combustion plate; one end of the gas distributing pipe is used for guiding in gas, the other end of the gas distributing pipe is communicated with the gas nozzle, and the combustion plate is arranged in the combustion cavity and located above the gas nozzle; the combustion plate is provided with a plurality of combustion grooves, each combustion groove is provided with a plurality of first combustion fire holes and a plurality of second combustion fire holes, and the first combustion fire holes and the second combustion fire holes are distributed at intervals in a staggered mode in the second direction; the length of the first combustion fire holes is larger than that of the second combustion fire holes. According to the source noise reduction combustor, the combustion fire hole structures with different lengths can be distributed on the combustion plate at intervals, so that the combustion area of the single combustion plate is increased, and the combustion noise is reduced.

Description

Technical Field

[0001] This utility model relates to the field of gas burner technology, and in particular to a source noise reduction burner. Background Technology

[0002] Currently, in the water heater industry, household water heaters are mainly divided into two types: electric water heaters and gas burners. In gas water heaters, the main function is to use gas combustion to exchange heat with the water in the pipes in order to heat the water.

[0003] However, the burners in gas water heaters produce a lot of noise during combustion. At present, noise reduction technologies mainly involve increasing the number of burner blades to reduce the load on each blade, thickening the shell to enhance sound insulation, using sound-absorbing cotton to consume noise energy, and setting up sound channels to extend the noise propagation path to achieve noise attenuation along the propagation path.

[0004] In common burners, the combustion holes on the burner plate are usually uniform combustion holes of the same length, with an area of ​​250~280mm². The heat intensity of the combustion holes is calculated using the formula q= It is known that under a certain heat load intensity, the larger the area of ​​the burner hole, the smaller the heat intensity of the burner hole. However, only when the heat intensity of the burner hole is greater, the speed at which the combustion air mixture leaves the burner hole is faster, and the flame noise is greater. The area of ​​the combustion burner hole in the existing technology is insufficient, resulting in a large flame noise. Utility Model Content

[0005] In order to overcome at least one of the defects of the prior art, the present invention provides a source noise reduction burner, which can increase the combustion area of ​​a single combustion plate and reduce combustion noise by distributing combustion fire holes of different lengths at intervals on the combustion plate.

[0006] The technical solution adopted by this utility model to solve its problem is:

[0007] A source noise reduction burner, comprising,

[0008] The burner housing has a combustion chamber inside; the burner housing has a gas passage and an air passage, both of which are connected to the combustion chamber.

[0009] A combustion assembly includes a gas distribution pipe, a gas nozzle, and a combustion plate. The gas distribution pipe is installed in the gas passage. One end of the gas distribution pipe is used to introduce gas, and the other end of the gas distribution pipe is connected to the gas nozzle. The combustion plate is disposed in the combustion chamber and located above the gas nozzle.

[0010] The combustion plate is provided with a plurality of combustion grooves, which are spaced apart in a first direction; the combustion grooves are provided with a plurality of first combustion holes and a plurality of second combustion holes, which are staggered and spaced apart in a second direction; the length of the first combustion hole is greater than the length of the second combustion hole.

[0011] Furthermore, the combustion plate includes a plurality of combustion segments, which are spaced apart and connected to each other in the first direction; each combustion segment includes a first combustion segment and two second combustion segments, with adjacent combustion segments connected by the first combustion segment; the bottom ends of the two second combustion segments are connected at an included angle to form the combustion groove; the first combustion hole is disposed on the two second combustion segments, and the second combustion hole is disposed on the first combustion segment and extends to the second combustion segment.

[0012] Furthermore, the depth of the combustion groove is h, where 1.5mm ≤ h ≤ 1.8mm.

[0013] Furthermore, the width of both the first and second combustion holes is b, where b is 0.6 mm.

[0014] Furthermore, two second combustion holes are provided between two adjacent first combustion holes.

[0015] Furthermore, the gas passage is provided with a first air control plate, which is slidably installed in the gas passage.

[0016] Furthermore, the first air control plate is provided with multiple air control holes.

[0017] Furthermore, the air channel is provided with a second air control plate, which is slidably installed in the air channel.

[0018] Furthermore, the diameter of the gas nozzle is d, where 1.85mm≤d≤1.90mm.

[0019] Furthermore, it also includes a fan assembly, which includes a smoke hood and a fan. The inlet end of the smoke hood is connected to the top of the combustion chamber. The fan is used to guide the combustion exhaust gas inside the combustion shell into the smoke hood when the impeller rotates. The outlet end of the smoke hood is connected to the outside. The inner diameter of the outlet end of the smoke hood is D, 85mm≤D≤90mm.

[0020] In summary, this utility model has the following technical effects:

[0021] 1. Due to the increased area of ​​the burner orifices, the heat intensity of the orifices decreases while the original combustion heat load remains unchanged. This slows down the speed at which the air-fuel mixture leaves the orifices, thereby effectively reducing flame noise and reducing noise at the source of combustion.

[0022] 2. The structure of alternating long and short combustion holes can be used to stabilize the flame by utilizing the velocity difference of the air-fuel mixture between the alternating long and short flame holes and avoiding combustion vibration. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the burner structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the combustion plate of this utility model;

[0025] Figure 3 This is a schematic diagram of the combustion element of this utility model;

[0026] Figure 4 This is a schematic diagram of the combustion single-piece structure from another perspective of the present invention;

[0027] Figure 5 This is a schematic diagram of the overall structure of the burner of this utility model.

[0028] The meanings of the reference numerals in the attached drawings are as follows: 10, burner housing; 11, combustion chamber; 12, first air control plate; 121, air control hole; 13, second air control plate; 20, gas distribution pipe; 30, combustion plate; 31, second combustion segment; 32, first combustion segment; 33, first combustion flame hole; 34, second combustion flame hole; 35, combustion groove; 40, smoke hood; 41, outlet end of smoke hood. Detailed Implementation

[0029] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0030] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0032] See Figures 1-5 This utility model discloses a source noise reduction burner, including a burner housing 10 and a combustion assembly. A combustion chamber 11 is provided inside the burner housing 10. At the same time, the burner housing 10 is also provided with an air passage for air introduction and a gas passage for gas introduction. Both the air passage and the combustion passage are connected to the combustion chamber 11.

[0033] The specific combustion components include a gas distribution pipe 20, a gas nozzle, and a combustion plate 30. The gas distribution pipe 20 is installed in the gas passage. One end of the gas distribution pipe 20 can be used to introduce gas, while the other end of the gas distribution pipe 20 is connected to the gas nozzle. The combustion plate 30 is located in the combustion chamber 11 and above the gas nozzle.

[0034] The combustion plate 30 is provided with a plurality of combustion grooves 35, and the plurality of combustion grooves 35 are spaced apart in the first direction; the combustion grooves 35 are provided with a plurality of first combustion holes 33 and a plurality of second combustion holes 34, and the plurality of first combustion holes 33 and the plurality of second combustion holes 34 are staggered and spaced apart in the second direction; the length of the first combustion hole 33 is greater than the length of the second combustion hole 34.

[0035] Based on the above structure, when using the source noise reduction burner of this utility model, the gas is introduced into the gas distribution pipe 20 from the gas pipeline. The gas distribution pipe 20 delivers the gas to each gas nozzle, and the gas enters the single ejector tube of the burner plate through the gas nozzle. Due to the high gas velocity at the gas nozzle, a low-pressure zone is formed around the gas nozzle. The low-pressure zone causes the surrounding air to be drawn into the ejector tube and mixed with the gas inside the ejector tube, so that the two can be fully and evenly mixed together to form a combustible mixture. The combustible mixture is then ignited at the multiple combustion holes in the combustion groove 35 of the combustion plate 30 for combustion.

[0036] Since the first combustion hole 33 and the second combustion hole 34 are located in the combustion groove 35, the combustible mixture is concentrated in the groove, forming a stable flow rate and direction at the outlet of the combustion hole. Therefore, the flames ignited by the first combustion hole 33 and the second combustion hole 34 are stable, reducing the possibility of backfire or flameout.

[0037] It should be noted that, since the first combustion flame hole 33 and the second combustion flame hole 34 are distributed alternately in this application, and the length of the first combustion flame hole 33 is greater than the length of the second combustion flame hole 34, when the length of the combustion groove 35 in the second direction remains unchanged, and the number of combustion flame holes distributed in the second direction is the same, then the combustion area of ​​the combustion flame hole is formed by the combustion area at the alternating longer first combustion flame hole 33 and the combustion area at the shorter second combustion flame hole 34. Compared with the prior art, which directly distributes combustion flame holes of the same shorter length, the combustion area is larger.

[0038] In other words, in this embodiment, due to the increased area of ​​the burner orifice, the heat intensity of the orifice decreases while the original combustion heat load remains unchanged, and the speed at which the air-fuel mixture leaves the orifice slows down, thereby effectively reducing flame noise and reducing noise from the source of combustion.

[0039] In contrast to directly increasing the combustion hole area by using longer combustion holes, adopting a combustion hole structure with alternating long and short holes can utilize the velocity difference of the combustion-air mixture between the alternating flame holes to stabilize the flame and avoid combustion vibration.

[0040] Furthermore, the combustion plate 30 in this embodiment includes a plurality of combustion segments, which are spaced apart and connected to each other in a first direction. Specifically, each combustion segment includes a first combustion segment 32 and two second combustion segments 31, with adjacent combustion segments connected by the first combustion segment 32; the bottom ends of the two second combustion segments 31 are connected at an included angle to form a combustion groove 35; a first combustion hole 33 is provided on the two second combustion segments 31, and a second combustion hole 34 is provided on the first combustion segment 32 and extends to the second combustion segment 31.

[0041] Since the combustion groove 35 is formed by connecting two adjacent second combustion segments 31 at an angle, the two sides of the combustion groove 35 can be inclined. Therefore, the sections of the first combustion holes 33 and the second combustion holes 34 of the two second combustion segments 31 can be inclined. This allows the combustible gas mixture guided to the combustion groove 35 to flow along the inclined surface, so that the gas has different flow trends in different directions and can be mixed more evenly.

[0042] Furthermore, since the two second combustion segments 31 of the combustion groove 35 are inclined, the combustion groove 35 is V-shaped, which can effectively concentrate the combustion flames of the first combustion hole 33 and the second combustion hole 34 toward the center, making it less likely for flameout to occur and allowing for more complete combustion.

[0043] Further, see Figure 4The depth of the combustion groove 35 is h, 1.5mm≤h≤1.8mm. Compared with the prior art, the depth of the combustion groove 35 is increased. When the amount of air in the combustible mixture is insufficient, air needs to be added. The larger combustion groove 35 forms a larger air filling space, making it easier to add air during secondary combustion, resulting in more complete combustion.

[0044] Furthermore, the width of both the first combustion hole 33 and the second combustion hole 34 is b, which is 0.6 mm. The area of ​​the combustion hole on each burner plate is S1, and the value of S1 is 320 mm²≤S1≤350 mm². This is larger than the combustion hole area in the prior art. The larger the area of ​​the combustion hole, the greater the heat intensity of the combustion hole and the better the combustion effect.

[0045] In this embodiment, h is preferably 1.8 mm, and the corresponding preferred value is S1 = 350 mm².

[0046] Furthermore, two second combustion holes 34 are provided between two adjacent first combustion holes 33, so that each pair of shorter second combustion holes 34 is paired with a longer first combustion hole 33 to form an alternating distribution. Since the flow velocity of the combustible gas mixture in a first combustion hole 33 is relatively small, but the amount of gas introduced is relatively large, the two second combustion holes 34 with larger flow velocities but smaller gas introduction amounts are used to achieve an alternating distribution, resulting in a relatively uniform gas and gas flow rate distribution and a better flame stabilization effect.

[0047] Furthermore, a first air control plate 12 is provided in the gas passage. The first air control plate 12 is slidably installed in the gas passage. Specifically, the first air control plate 12 can be a baffle structure or a round hole structure. Its function is to adjust the amount of air introduced by the gas passage and reduce the amount of air distribution in the first combustion process.

[0048] Specifically, in this embodiment, the first air control plate 12 is provided with a plurality of air control holes 121. The first air control plate 12 slides into the gas passage, so that the size of the air control hole 121 can limit the amount of air introduced through the gas passage.

[0049] Of course, if the first air control plate 12 is formed by a baffle structure, the first air control plate 12 can slide to the gas passage and block part of the gas passage, thereby controlling the amount of air introduced.

[0050] Furthermore, the air passage is provided with a second air control plate 13, which is slidably installed in the air passage. Similarly, the second air control plate 13 can adopt a baffle structure or a round hole structure. Its function is to adjust the amount of air introduced by the air passage and reduce the amount of air distribution in the first or second combustion process.

[0051] It should be noted that the first and second air control plates are slidably installed in the gas and air passages. This can be achieved by setting a groove on the burner housing corresponding to the gas passage, allowing the edges of the first and second air control plates to be slidably fitted into the groove. Alternatively, the first and second air control plates can be fitted into multiple positioning holes on the sides of the gas and air passages using positioning pins, thus allowing for position adjustment.

[0052] Furthermore, the diameter of the gas nozzle is d, where 1.85mm ≤ d ≤ 1.90mm. Compared to existing gas nozzles, the gas nozzle in this application has a larger diameter to reduce the injection pressure of the gas through the nozzle and slow down the gas flow rate at the nozzle orifice. The lower the gas flow rate, the lower the flame noise, thereby reducing the noise of flame combustion.

[0053] Furthermore, it also includes a fan assembly, which includes a smoke hood 40 and a fan. The inlet end of the smoke hood 40 is connected to the top of the combustion chamber 11. The fan is used to guide the combustion exhaust gas inside the combustion shell into the smoke hood 40 when the impeller rotates. The outlet end 41 of the smoke hood is connected to the outside, so that the combustion exhaust gas generated in the combustion chamber 11 can be discharged in time through the smoke hood 40 by starting the fan.

[0054] See Figure 5 The inner diameter of the outlet end 41 of the smoke collection hood is D, 85mm≤D≤90mm. By increasing the size of the smoke outlet of the fan smoke collection hood 40, the fan head can be increased, and the fan speed can be reduced while ensuring the same air volume, thereby reducing the wind noise during the exhaust process of the burner.

[0055] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A source noise reducing burner, characterized by, include, The burner housing has a combustion chamber inside; the burner housing has a gas passage and an air passage, both of which are connected to the combustion chamber. A combustion assembly includes a gas distribution pipe, a gas nozzle, and a combustion plate. The gas distribution pipe is installed in the gas passage. One end of the gas distribution pipe is used to introduce gas, and the other end of the gas distribution pipe is connected to the gas nozzle. The combustion plate is disposed in the combustion chamber and located above the gas nozzle. The combustion plate is provided with a plurality of combustion grooves, which are spaced apart in a first direction; the combustion grooves are provided with a plurality of first combustion holes and a plurality of second combustion holes, which are staggered and spaced apart in a second direction; the length of the first combustion hole is greater than the length of the second combustion hole.

2. The source noise reduced burner of claim 1, wherein, The combustion plate includes multiple combustion segments, which are spaced apart and connected to each other in the first direction. Each combustion segment includes a first combustion segment and two second combustion segments, with adjacent combustion segments connected by the first combustion segment. The bottom ends of the two second combustion segments are connected at an angle to form the combustion groove. The first combustion hole is located on the two second combustion segments, and the second combustion hole is located on the first combustion segment and extends to the second combustion segment.

3. The source de-noised burner of claim 2, wherein, The depth of the combustion groove is h, where 1.5mm ≤ h ≤ 1.8mm.

4. The source de-noised combustor of claim 3, wherein, The width of both the first and second combustion holes is b, where b is 0.6 mm.

5. The source noise reducing combustor according to claim 2, wherein, Two second combustion holes are provided between two adjacent first combustion holes.

6. A source noise reducing combustor according to any one of claims 1-5, wherein, The gas passage is equipped with a first air control plate, which is slidably installed in the gas passage.

7. The source noise reduced burner of claim 6, wherein, The first air control plate is provided with multiple air control holes.

8. The source de-noised combustor of claim 6, wherein, The air passage is provided with a second air control plate, which is slidably installed in the air passage.

9. A source noise reducing combustor as in any of claims 1-5, wherein, The diameter of the gas nozzle is d, where 1.85mm≤d≤1.90mm.

10. A source noise reducing combustor as in any of claims 1-5, wherein, It also includes a fan assembly, which includes a smoke hood and a fan. The inlet end of the smoke hood is connected to the top of the combustion chamber. The fan is used to guide the combustion exhaust gas inside the combustion shell into the smoke hood when the impeller rotates. The outlet end of the smoke hood is connected to the outside. The inner diameter of the outlet end of the smoke hood is D, 85mm≤D≤90mm.

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