A burner monolithic and a burner having the same

Abstract

The present application provides a kind of burner single piece, including ejector, upper open fire row shell and the combustion plate of being arranged on the upper opening, and the fire hole group of being arranged at intervals is provided on the combustion plate, each fire hole group includes several fire holes, the ejector includes first ejector and second ejector, the air inlet end of the first ejector is oppositely arranged with the air inlet end of the second ejector, the air outlet end of the first ejector and the first air outlet passage between the fire hole are formed, and the second air outlet passage is formed between the air outlet end of the second ejector and the fire hole.Effectively improve the flow uniformity of the fire hole outlet airflow, reduce the flame interference between flame group.

Description

Technical Field

[0001] This invention relates to the field of burner technology, and more specifically to a burner wafer and a burner having the same. Background Technology

[0002] Currently, the single-channel pipe burner is one of the most widely used single-blade burners. However, its structure inevitably leads to lower pressure at the gas and air inlets, resulting in significant differences in flow velocity between the left and right sides and increased combustion noise. The design of burner blades requires strict control over the molding depth and width of the flame holes, as this greatly affects the outlet velocity distribution of the gas-air mixture. Under certain fuel mixture composition and concentration conditions: when the flame propagation velocity Sn > Vm (average flow velocity of the mixture) (when the velocity difference is large), backfire will occur; when Sn < Vm, flameout will occur. The shape of the flame holes also has a significant impact. V-shaped staggered strip flame holes result in a thinner inner flame and weaker flame stabilization performance, leading to worse combustion conditions with slight fluctuations in external conditions. Mesh burner blades have complex mesh processing and are subject to higher application conditions. Furthermore, the existing types of burner blades are prone to unstable heat release rate fluctuations and system combustion oscillations when developing products with high fuel consumption and small combustion volume chambers, resulting in a very poor user experience. Summary of the Invention

[0003] This invention addresses one of the problems existing in the prior art to a certain extent. Therefore, the purpose of this invention is to propose a single burner plate with uniform airflow velocity at the burner outlet.

[0004] The above objective is achieved through the following technical solution:

[0005] A single burner plate includes an ejector tube, a fire vent shell with an upper opening, and a combustion plate disposed on the upper opening. The combustion plate has a group of flame holes arranged at intervals. Each fire control group includes a plurality of flame holes. The ejector tube includes a first ejector tube and a second ejector tube. The air inlet end of the first ejector tube is disposed opposite to the air inlet end of the second ejector tube. A first air outlet channel is formed between the air outlet end of the first ejector tube and the flame holes, and a second air outlet channel is formed between the air outlet end of the second ejector tube and the flame holes.

[0006] As a further improvement of the present invention, the centerline of the air inlet end of the first ejector tube and the centerline of the air inlet end of the second ejector tube are on the same horizontal plane.

[0007] As a further improvement of the present invention, the first ejector tube and / or the second ejector tube respectively include a contraction section, a diffusion section and a mixing section from the air inlet end to the air outlet end. The cross-section of the contraction section gradually decreases from the side near the air inlet end to the side away from the air inlet end, the cross-section of the diffusion section gradually increases from the side near the air inlet end to the side away from the air inlet end, and the mixing section connects the diffusion section with the flame hole.

[0008] As a further improvement of the present invention, the flame holes are arranged longitudinally along the combustion plate, and the flame holes include a main flame hole arranged near the center of the combustion plate and auxiliary flame holes arranged at both ends of the combustion plate. The mixing section includes a first cavity communicating with the main flame hole and a second cavity communicating with the auxiliary flame hole, and the volume of the first cavity is larger than the volume of the second cavity.

[0009] As a further improvement of the present invention, the combustion plate includes a first inclined plate and a second inclined plate, one end of the first inclined plate is connected to one end of the second inclined plate, and the first inclined plate is inclined downward from the end away from the second inclined plate to the end near the second inclined plate, and the second inclined plate is inclined downward from the end away from the first inclined plate to the end near the first inclined plate.

[0010] As a further improvement of the present invention, the combustion plate is provided with a plurality of groups of fire holes, each group of fire holes containing 8-12 fire holes.

[0011] As a further improvement of the present invention, a flame stabilizing groove is formed between the firebox shell and the left and right sidewalls of the combustion plate, and the width of the flame stabilizing groove is 0.5-2mm.

[0012] As a further improvement of the present invention, the flame stabilizing groove includes a first flame stabilizing groove formed between the fire vent shell and the left side wall of the combustion plate, and a second flame stabilizing groove formed between the fire vent shell and the right side wall of the combustion plate. A first flame transfer plate is also provided on the first flame stabilizing groove, and a second flame transfer plate is provided on the second flame stabilizing groove. The first flame transfer plate and the second flame transfer plate are inclined and form an included angle of 20-180° between the first flame transfer plate and the second flame transfer plate.

[0013] As a further improvement of the present invention, the fire vent shell has a wedge-shaped structure that is larger in the middle and smaller on both sides.

[0014] The purpose of this invention is to provide a burner with low operating noise.

[0015] The above objective is achieved through the following technical solution:

[0016] A burner includes a burner plate as described above, and also includes a gas distribution pipe, on which a first nozzle and a second nozzle are provided, the first nozzle facing the first ejector tube and the second nozzle facing the second ejector tube.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] 1. This invention proposes a single burner piece that effectively improves the uniformity of airflow velocity at the burner outlet, reduces flame surface interference between flame groups, lowers operating noise, effectively ensures combustion intensity and efficiency, and guarantees complete combustion.

[0019] 2. This invention proposes a burner with low operating noise, which effectively ensures combustion intensity and efficiency, and guarantees complete combustion. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a single burner piece in one embodiment;

[0021] Figure 2 This is a cross-sectional view of a single burner piece in one embodiment;

[0022] Figure 3 This is another cross-sectional view of a single burner plate in one embodiment;

[0023] Figure 4 This is a side view of a single burner piece in one embodiment;

[0024] Figure 5 for Figure 4 A magnified view of a section at point A in the middle;

[0025] Figure 6 This is a schematic diagram of the structure of the fire exhaust shell in the embodiment. Detailed Implementation

[0026] The following embodiments illustrate the present invention, but the present invention is not limited to these embodiments. Modifications to the specific embodiments of the present invention or equivalent substitutions for some technical features, without departing from the spirit of the present invention, should all be covered within the scope of the technical solutions claimed in the present invention.

[0027] Example 1:

[0028] See Figure 1-6The present invention illustrates a single burner element 1, comprising an ejector tube 2, a fire vent shell 9 with an upper opening, and a combustion plate 3 disposed on the upper opening. The combustion plate 3 is provided with a fire hole 4. The ejector tube 2 includes a first ejector tube 21 and a second ejector tube 22. The air inlet end of the first ejector tube 21 is disposed opposite to the air inlet end of the second ejector tube 22. A first air outlet channel is formed between the air outlet end of the first ejector tube 21 and the fire hole 4, and a second air outlet channel is formed between the air outlet end of the second ejector tube 22 and the fire hole 4.

[0029] This invention proposes a single burner element 1, comprising two ejector tubes 2, namely a first ejector tube 21 and a second ejector tube 22, which are arranged opposite to each other. A gas distribution pipe 8 can be provided between the first ejector tube 21 and the second ejector tube 22. Nozzles are provided on the gas distribution pipe 8, including a first nozzle 81 and a second nozzle 82. The first nozzle 81 faces the first ejector tube 21, and the second nozzle 82 faces the second ejector tube 22. Under the premise of providing the same amount of fuel gas, the pressure value of the fuel gas ejected from the nozzle is proportional to the square of the flow velocity at the outlet of the flame hole 4. Since there are two nozzles supplying fuel gas to the two ejector tubes 2 respectively, the secondary pressure value can be reduced during pressure value selection. Therefore, the two nozzles can be designed to be smaller in size without reducing combustion intensity and efficiency. On the contrary, it improves combustion completeness and flue gas indicators, effectively ensuring combustion intensity and efficiency, and guaranteeing complete combustion. It also effectively improves the uniformity of the airflow velocity at the flame hole outlet and reduces flame surface interference between flame groups.

[0030] The lower secondary gas pressure value is significantly less affected by external conditions and primary pressure fluctuations. That is, the pressure gap range that might have occurred before will also be reduced, which greatly improves the applicability, comfort and reliability of the whole machine.

[0031] Reducing the secondary pressure of the gas and decreasing the outlet velocity of the burner hole 4 can greatly reduce the noise generated by airflow disturbance and lower the operating noise.

[0032] The centerline of the air inlet end of the first ejector tube 21 and the centerline of the air inlet end of the second ejector tube 22 are on the same horizontal plane. Since the air inlet ends of the first ejector tube 21 and the second ejector tube 22 are arranged opposite each other and their centerlines are on the same horizontal plane, the first nozzle 81 and the second nozzle 82 can be symmetrically arranged on the gas distribution pipe 8 to supply gas to the first ejector tube 21 and the second ejector tube 22. The design is reasonable and convenient to use.

[0033] The first ejector tube 21 and / or the second ejector tube 22 respectively include a contraction section 5, a diffusion section 6 and a mixing section 7 from the air inlet end to the air outlet end. The cross-section of the contraction section 5 gradually decreases from the side near the air inlet end to the side away from the air inlet end. The cross-section of the diffusion section 6 gradually increases from the side near the air inlet end to the side away from the air inlet end. The mixing section 7 connects the diffusion section 6 to the flame hole 4.

[0034] The gas and air entering the ejector tube 2 sequentially pass through the contraction section 5, the diffuser section 6, and the mixing section 7 before entering the gas port of the burner housing 9. The contraction section 5 on the ejector tube 2 faces the nozzle, and the end of the contraction section 5 facing the nozzle has a larger cross-section, facilitating the ejection of gas from the nozzle into the ejector tube 2. The end of the contraction section 5 away from the nozzle has a smaller cross-section, allowing the air and gas entering the ejector tube 2 to mix. The gas-air mixture then enters the diffuser section 6 after passing through the contraction section 5. The cross-section of the diffuser section 6 gradually increases, further homogenizing the gas and air. Finally, the gas-air mixture enters the mixing section 7 after passing through the diffuser section 6. The mixing section 7 has a semi-annular cross-section, requiring the gas-air mixture to pass through a semi-annular bend before reaching the burner housing 9 or the burner port 4, effectively ensuring thorough mixing of the gas and air.

[0035] The flame hole 4 is arranged longitudinally along the combustion plate 3. The flame hole 4 includes a main flame hole 41 located near the center of the combustion plate 3 and auxiliary flame holes 42 located at both ends of the combustion plate 3. The mixing section 7 includes a first cavity 71 communicating with the main flame hole 41 and a second cavity 72 communicating with the auxiliary flame hole 42. The volume of the first cavity 71 is larger than the volume of the second cavity 72.

[0036] In this embodiment, the connection between the first cavity 71 and the second cavity 72 is narrowed, so that the volume of the first cavity 71 is larger than the volume of the second cavity 72. In other embodiments, the volume can gradually decrease from the first cavity 71 towards the second cavity 72, so that the volume of the first cavity 71 is larger than the volume of the second cavity 72. This allows for a greater flow of the fuel gas and air mixture towards the main burner port 41.

[0037] Because the mixture of air and gas in the ejector tube 2 travels a long distance to the middle of the burner hole 4 or the burner shell 9, and a short distance to the sides of the burner hole 4 or the burner shell 9, the mixture of gas and air is regulated to flow more towards the main burner hole 41, the concentration of the mixture of gas and air on both sides is distributed and the flow rate is controlled, so that the speed and concentration at the entire outlet of the burner tend to be uniformly distributed.

[0038] The burner shell 9 has a wedge-shaped structure, wider in the middle and narrower at both sides. The upper edge of the burner shell 9 is an arc-shaped edge with a higher center and lower sides, while the lower edge is an arc-shaped edge with a lower center and higher ends, forming the wedge-shaped structure. The angle α between the end of the upper edge or the end of the lower edge of the burner shell 9 and the horizontal plane is 1-3°. Because the mixture of air and fuel gas in the ejector tube 2 travels a relatively long distance to the burner hole 4 or the middle of the burner shell 9, and a shorter distance to the sides, the concentration and flow rate of the fuel gas and air on the burner are ensured to be uniform.

[0039] The combustion plate 3 includes a first inclined plate 31 and a second inclined plate 32. One end of the first inclined plate 31 is connected to one end of the second inclined plate 32. The first inclined plate 31 is inclined downward from the end away from the second inclined plate 32 to the end close to the second inclined plate 32. The second inclined plate 32 is inclined downward from the end away from the first inclined plate 31 to the end close to the first inclined plate 31.

[0040] The height difference H between the bottom and top of the first inclined plate 31 or the second inclined plate 32 is 1-2 mm, that is, the molding depth of the combustion plate 3 is 1-2 mm. The cross-section of the combustion plate 3 is "V" shaped. The flame holes 4 are symmetrically distributed on the first inclined plate 31 and the second inclined plate 32.

[0041] The combustion plate 3 is provided with several groups of flame holes 4, each group of flame holes 4 containing 8-12 flame holes 4. In this embodiment, each group of flame holes 4 contains 10 flame holes 4. Five flame holes 4 are symmetrically arranged on the first inclined plate and five flame holes 4 are on the second inclined plate, and the five flame holes 4 on the first inclined plate or the second inclined plate are evenly spaced, that is, evenly distributed.

[0042] A flame stabilizing groove is formed between the firebox shell 9 and the left and right side walls of the combustion plate 3, and the width C of the flame stabilizing groove is 0.5-2mm.

[0043] The flame stabilizing groove includes a first flame stabilizing groove 11 formed between the firebox shell 9 and the left side wall of the combustion plate 3, and a second flame stabilizing groove 12 formed between the firebox shell 9 and the right side wall of the combustion plate 3. A first flame transfer plate 13 is also provided on the first flame stabilizing groove 11, and a second flame transfer plate 14 is provided on the second flame stabilizing groove 12. The first flame transfer plate 13 and the second flame transfer plate 14 are inclined and form an included angle b between the first flame transfer plate 13 and the second flame transfer plate 14. The included angle b is 20-180°.

[0044] In this embodiment, the included angle b between the first ignition plate 13 and the second ignition plate 14 is 120°.

[0045] Example 2:

[0046] A burner includes a burner plate 1 as described above, and a gas distribution pipe 8. A first nozzle 81 and a second nozzle 82 are provided on the gas distribution pipe 8. The first nozzle 81 faces the first ejector tube 21, and the second nozzle 82 faces the second ejector tube 22. The gas distribution pipe 8 is disposed between the first ejector tube 21 and the second ejector tube 22. The nozzles on the gas distribution pipe 8 include a first nozzle 81 and a second nozzle 82. The first nozzle 81 faces the first ejector tube 21, and the second nozzle 82 faces the second ejector tube 22. Under the premise of providing the same amount of gas, when designing the nozzles, the pressure value of the gas ejected from the nozzles is proportional to the square of the outlet velocity of the flame hole 4. Since there are two nozzles supplying gas to the two ejector tubes 2 respectively, the secondary pressure value can be reduced during the pressure value selection design. Therefore, the two nozzles can be designed to be smaller in size, but their combustion intensity and efficiency will not be reduced. On the contrary, the completeness of combustion and flue gas indicators are improved, effectively ensuring combustion intensity and efficiency, and guaranteeing complete combustion.

[0047] The above preferred embodiments should be regarded as illustrative examples of the embodiments of the present application. Any technical deductions, substitutions, improvements, etc. that are similar to or based on the present application should be considered within the scope of protection of this patent.

Claims

1. A single burner plate, characterized in that, It includes an ejector tube (2), a firebox shell (9) with an upper opening, and a combustion plate (3) disposed on the upper opening. The combustion plate (3) is provided with a group of fire holes arranged at intervals. Each group of fire holes includes a plurality of fire holes (4). The ejector tube (2) includes a first ejector tube (21) and a second ejector tube (22). The air inlet end of the first ejector tube (21) is disposed opposite to the air inlet end of the second ejector tube (22). A first air outlet channel is formed between the air outlet end of the first ejector tube (21) and the fire hole (4). A second air outlet channel is formed between the air outlet end of the second ejector tube (22) and the fire hole (4). The first ejector tube (21) and the second ejector tube (22) respectively include a contraction section (5), a diffusion section (6) and a mixing section (7) from the air inlet end to the air outlet end; The flame hole (4) is arranged longitudinally along the combustion plate (3). The flame hole (4) includes a main flame hole (41) located near the center of the combustion plate (3) and auxiliary flame holes (42) located at both ends of the combustion plate (3). The mixing section (7) includes a first cavity (71) communicating with the main flame hole (41) and a second cavity (72) communicating with the auxiliary flame hole (42). The volume of the first cavity (71) is larger than the volume of the second cavity (72). The upper edge of the fire purifier shell (9) is an arc-shaped edge that is high in the middle and low on both sides, and the lower edge of the fire purifier shell (9) is an arc-shaped edge that is low in the middle and high at both ends, so as to form a wedge-shaped structure that is large in the middle and small on both sides.

2. A single burner piece according to claim 1, characterized in that, The centerline of the air inlet end of the first ejector tube (21) and the centerline of the air inlet end of the second ejector tube (22) are on the same horizontal plane.

3. A single burner piece according to claim 1, characterized in that, The contraction section (5) gradually decreases in cross-section from the side near the air intake end to the side away from the air intake end, the diffusion section (6) gradually increases in cross-section from the side near the air intake end to the side away from the air intake end, and the mixing section (7) connects the diffusion section (6) to the fire hole (4).

4. A single burner piece according to any one of claims 1-3, characterized in that, The combustion plate (3) includes a first inclined plate (31) and a second inclined plate (32). One end of the first inclined plate (31) is connected to one end of the second inclined plate (32). The first inclined plate (31) is inclined downward from the end away from the second inclined plate (32) to the end close to the second inclined plate (32). The second inclined plate (32) is inclined downward from the end away from the first inclined plate (31) to the end close to the first inclined plate (31).

5. A single burner piece according to claim 4, characterized in that, The combustion plate (3) is provided with several sets of fire hole groups, each of which contains 8-12 fire holes (4).

6. A single burner piece according to claim 1, characterized in that, A flame stabilizing groove is formed between the firebox shell (9) and the left and right side walls of the combustion plate (3), and the width of the flame stabilizing groove is 0.5-2mm.

7. A single burner piece according to claim 6, characterized in that, The flame stabilizing groove includes a first flame stabilizing groove (11) formed between the fire purging shell (9) and the left side wall of the combustion plate (3), and a second flame stabilizing groove (12) formed between the fire purging shell (9) and the right side wall of the combustion plate (3). A first flame transfer plate (13) is also provided on the first flame stabilizing groove (11), and a second flame transfer plate (14) is provided on the second flame stabilizing groove (12). The first flame transfer plate (13) and the second flame transfer plate (14) are inclined and form an included angle of 20-180° between the first flame transfer plate (13) and the second flame transfer plate (14).

8. A burner, characterized in that, The burner includes a single burner plate according to any one of claims 1-7, and further includes a gas distribution pipe (8), on which a first nozzle (81) and a second nozzle (82) are provided, the first nozzle (81) facing the first ejector tube (21) and the second nozzle (82) facing the second ejector tube (22).

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