An updraft high efficiency burner

Abstract

The utility model relates to a gas burner technical field, concretely relates to an efficient burner of upper air inlet, including a plurality of with gas supply assembly cooperation's injection channel, injection channel mutually supports and forms the cyclone convergence chamber, is provided with the guide plate for guiding gas to flow upwards on the cyclone convergence chamber, is provided with the apron above the guide plate, and the apron cover is established in the guide plate rear and forms the annular gas mixing chamber, is provided with the splitter plate in the gas mixing chamber, and the splitter plate divides the gas mixing chamber into the upper chamber and lower chamber, the utility model discloses the structure of the injection channel of the burner and the structure of the gas mixing chamber above are improved, make the stable uniform cyclone after gas enters from outside, after entering the gas mixing chamber, can form the uniform stable combustion that is guided to the apron, effectively avoid the deflagration and the explosion phenomenon in the ignition combustion process, help to promote the efficiency of combustion, guarantee the safe and reliable of combustion.

Description

Technical Field

[0001] This utility model relates to the field of gas burner technology, specifically to a top-inlet high-efficiency burner. Background Technology

[0002] Gas burners, as key equipment for mixing gas and air and igniting them, are widely used in industrial and civil fields, such as gas stoves, boilers, heating furnaces, and wall-hung boilers. Currently, the structure of gas burners on the market mainly includes the burner body, fuel nozzle, gas passage, mixing device, ignition device, and combustion chamber.

[0003] Existing burners exhibit several problems that urgently need to be addressed during operation. Firstly, they suffer from poor airflow stability. The shape, size, and relative position of the burner's fuel nozzles and gas passages are not designed optimally, making the mixing of fuel gas and air before entering the combustion chamber susceptible to external disturbances (such as furnace pressure fluctuations and surrounding airflow disturbances), resulting in unstable airflow. This unstable airflow causes the flame to wobble, fork, or even extinguish during combustion, reducing combustion efficiency and potentially leading to incomplete combustion and increased emissions of pollutants such as carbon monoxide and nitrogen oxides.

[0004] It is evident that existing burners still have room for improvement and should be optimized to improve their structure. This includes optimizing the air intake structure, such as using swirling gas channels or specially shaped mixing chambers, to enhance the uniformity of gas-air mixing, reduce the impact of external interference on airflow stability, and ensure that the mixture has good flow characteristics and concentration uniformity upon entering the combustion chamber. This results in a more stable airflow and more uniform gas-air mixing, thereby guaranteeing the stability and reliability of the burner. Therefore, a more reasonable technical solution is needed to address the technical problems existing in the current technology. Utility Model Content

[0005] To overcome at least one of the aforementioned defects, this utility model proposes a top-inlet high-efficiency burner, which aims to improve the structure of the burner so that the mixed gas enters the burner in a swirling direction. The mixing chamber inside the burner forms two chambers, an upper chamber and a lower chamber. Under the action of the flow divider, backflow can be avoided, thereby ensuring stable combustion and preventing deflagration and detonation.

[0006] To achieve the above objectives, the burner disclosed in this utility model can adopt the following technical solution:

[0007] A high-efficiency burner with top air intake includes several ejector channels that cooperate with the gas supply assembly. The ejector channels cooperate with each other to form a swirling converging cavity. A guide plate is provided on the swirling converging cavity to guide the gas to flow upward. A cover plate is provided above the guide plate. The cover plate covers the guide plate to form an annular mixing cavity. A flow divider is provided in the mixing cavity, which divides the mixing cavity into an upper cavity and a lower cavity.

[0008] The aforementioned burner guides the gas through a swirling converging chamber, enabling the gas to form a swirling flow after entering the swirling converging chamber from the ejector channel. This ensures uniform flow and the gas enters the mixing chamber of the cover plate. The gas flow in the mixing chamber is separated by a flow divider and flows from the lower chamber into the upper chamber, then flows out from the upper chamber for combustion. This achieves uniform and stable combustion, preventing deflagration during ignition and combustion, and explosions during flameout.

[0009] Furthermore, the combustion flame of the burner is optimized to form inner and outer ring flames, which can be achieved through various schemes. Here, we optimize and propose one feasible option: the ejector channel includes an outer ring ejector channel and an inner ring ejector channel. The outer ring ejector channels are numerous and evenly spaced along the circumference, connecting to the outer ring swirl converging cavity. The inner ring ejector channels are also numerous and extend to the inner ring swirl converging cavity. When using the above scheme, the outer ring swirl converging cavity guides the gas upward to form an outer ring combustion flame, and the inner ring swirl converging cavity guides the gas upward to form an inner ring combustion flame.

[0010] Furthermore, the outer annular vortex converging cavity has a relatively large space, requiring a larger volume of gas to be introduced, and it incorporates multiple air intake structures. Therefore, the space within the outer annular vortex converging cavity is a gradually expanding cavity to assist in air intake. In contrast, the inner annular vortex converging cavity has a smaller space, requiring a limited volume of gas to be introduced, and generally only one intake point is provided. Therefore, optimization is proposed, and one feasible option is suggested: the inner annular vortex converging cavity includes a circular annular channel with a uniform inner diameter. When using this scheme, the gas directly enters the inner annular vortex converging cavity along the inner annular ejector channel, forming a swirling airflow.

[0011] Furthermore, to facilitate the introduction of external air, the ejector channel can be constructed in various forms, and its structure is not limited to a single one. Here, we optimize and propose one feasible option: the ejector channel forms a throat inward from the ejector opening, and a diffusion section is formed during the diffusion process from the throat into the mixing chamber. The inner diameter of the diffusion section gradually increases and connects to the swirling convergence chamber. When the above scheme is adopted, as the mixed gas is transported through the throat to the diffusion section, the diffusion expansion of the space promotes the formation of negative pressure, improving the efficiency of mixed gas entry, and thus also improving the efficiency of drawing in external air.

[0012] Furthermore, for the gas to achieve stable combustion after flowing out of the cover plate body, the cover plate structure needs optimization. One feasible option is proposed here: the cover plate includes a cover plate body with an outwardly inclined annular surface. A plurality of combustion holes are evenly arranged on the annular surface. These combustion holes include high-level holes and low-level holes, with equal widths and a longer length than the low-level holes. When using this scheme, the high-level and low-level holes can be evenly or non-evenly intersected.

[0013] Furthermore, the manifold is used to divide the mixing chamber, and its structure can be constructed in various forms. Here, we optimize and propose one feasible option: the manifold includes an intermediate cylinder, with an annular panel at the upper end of the intermediate cylinder. Several air holes are evenly distributed along the circumference of the annular panel, and these air holes extend obliquely from the lower surface of the annular panel to its upper surface. With this design, the manifold divides the burner's mixing chamber into an upper and lower chamber. Gas from the lower chamber enters the upper chamber after passing through the manifold, maintaining gas flow stability during ignition, ensuring a stable and reliable ignition process, and preventing deflagration. It also prevents gas backflow, avoiding popping sounds during flameout. Therefore, the manifold effectively improves the combustion stability and reliability of the burner.

[0014] Furthermore, the specific structure of the vent can be polygonal, curved, or irregular; its structure is not uniquely limited. Here, we propose one feasible option: the vent includes a horizontal upper port on the upper surface of the annular panel, a guide structure extending from the upper port to the lower surface of the annular surface, and a vertical port at the end of the guide structure. When using this scheme, the gas in the lower cavity flows through the guide structure, moving from below the annular panel to above it, forming an inclined airflow that is distributed circumferentially, thus creating a stable vortex above the annular panel.

[0015] Furthermore, the horizontal upper port of the vent can be constructed in various forms, and its structure is not uniquely limited. Here, we optimize and propose one feasible option: the horizontal upper port includes a long side and a short side, with the long side extending to the short side via an arc-shaped edge. When adopting this scheme, the arc-shaped edge restricts the guiding space within the guiding structure. The airflow from the lower cavity to the upper cavity is more likely to maintain its stream shape under the restriction of the arc-shaped edge, avoiding the formation of scattered turbulence.

[0016] Furthermore, the guide plate, used to guide the airflow from the swirling convergence chamber to the mixing chamber, can be constructed in various forms. Here, we optimize and propose one feasible option: the guide plate includes an integrally formed central ring and an outer ring, the outer ring being concentrically arranged with the central ring. The central ring forms a central through-hole that mates with the guide plate, and several guide ports are provided at the edge of the central through-hole. When the gas mixture of fuel and air is delivered from the gas ejector pipe to below the guide plate, it rises from the guide ports to above the guide plate. With this design, the cooperation between the guide plate, the gas ejector pipe, and the flow divider plate orderly guides the mixed gas from the gas ejector pipe to the upper flow divider plate, which is located within the mixing chamber, thereby forming a stable airflow. This facilitates subsequent stable combustion, not only improving the quality of combustion but also helping to eliminate detonation and knocking sounds.

[0017] Furthermore, the central through-hole is used to cooperate with the gas ejector pipe and the flow divider plate. Its structure is not uniquely limited. Here, we optimize and propose one feasible option: the central through-hole includes a circular hole, and the flow guide includes an arc-shaped opening extending outward from the edge of the circular hole. When adopting the above scheme, the number of flow guides in the central through-hole is not limited. When multiple flow guides are provided, the flow guides are evenly spaced along the edge of the circular hole.

[0018] Compared with the prior art, some of the beneficial effects of the technical solution disclosed in this utility model include:

[0019] This invention improves the structure of the burner's ejector channel and the upper mixing chamber, enabling the gas to form a stable and uniform swirling flow after entering from the outside. After entering the mixing chamber, the gas is guided to the cover plate, resulting in uniform and stable combustion. This effectively avoids deflagration and knocking during the ignition and combustion process, helps improve combustion efficiency, and ensures safe and reliable combustion. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the burner.

[0022] Figure 2 This is a schematic diagram of the overall structure of the burner from another perspective.

[0023] Figure 3 This is a bottom view of the burner's structure.

[0024] Figure 4 This is a cross-sectional view of the burner.

[0025] Figure 5 This is a front view schematic diagram of the burner.

[0026] Figure 6 This is a schematic diagram of the overall structure of the manifold.

[0027] Figure 7 This is a front view schematic diagram of the distributor plate.

[0028] Figure 8 This is a cross-sectional schematic diagram of the manifold.

[0029] Figure 9 This is a schematic diagram of the overall structure of the guide plate.

[0030] Figure 10 This is a top view of the structure after the guide plate and ejection channel are assembled.

[0031] In the above attached figures, the meanings of each label are as follows:

[0032] 1. Cover plate; 101. High-position hole; 102. Low-position hole; 103. Upper cavity; 104. Lower cavity; 2. Ejector channel; 201. Outer ring ejector channel; 202. Inner ring ejector channel; 3. Swirl converging cavity; 301. Outer ring swirl converging cavity; 302. Inner ring swirl converging cavity; 4. Guide plate; 401. Central ring; 402. Outer ring; 403. Central through hole; 404. Flow guide port; 5. Diverter plate; 501. Intermediate cylinder; 502. Annular panel; 503. Air hole; 5031. Horizontal upper port; 5032. Guide structure; 5033. Vertical longitudinal port. Detailed Implementation

[0033] The following description, in conjunction with the accompanying drawings and specific embodiments, further illustrates this embodiment.

[0034] In view of the many shortcomings of the burners in the prior art, the following embodiments are optimized and overcome the defects of the prior art.

[0035] Example

[0036] like Figures 1-10 As shown, this embodiment provides a top-inlet high-efficiency burner, including several ejector channels 2 that cooperate with the gas supply assembly. The ejector channels 2 cooperate with each other to form a swirling converging cavity 3. A guide plate 4 is provided on the swirling converging cavity 3 to guide the gas to flow upward. A cover plate 1 is provided above the guide plate 4. After the cover plate 1 covers the guide plate 4, it forms an annular mixing cavity. A flow divider 5 is provided in the mixing cavity, which divides the mixing cavity into an upper cavity 103 and a lower cavity 104.

[0037] The burner disclosed in this embodiment guides the gas through the swirling convergence chamber 3, so that the gas enters the swirling convergence chamber 3 from the ejector channel 2 and forms a swirling flow, maintaining a uniform flow and entering the mixing chamber of the cover plate 1. The airflow in the mixing chamber is separated by the flow divider 5 and flows from the lower chamber 104 into the upper chamber 103, and then flows out from the upper chamber 103 for combustion, thereby achieving uniform and stable combustion, which can avoid deflagration during ignition and combustion and explosion during flameout.

[0038] The combustion flame of the burner is optimized to form an inner and outer ring flame, which can be achieved through various schemes. This embodiment optimizes and adopts one feasible option: the ejector channel 2 includes an outer ring ejector channel 201 and an inner ring ejector channel 202. The outer ring ejector channels 201 are numerous and evenly spaced along the circumference, connecting to the outer ring swirl converging cavity 301. The inner ring ejector channels 202 are numerous and extend to the inner ring swirl converging cavity 302. With this scheme, the outer ring swirl converging cavity 301 guides the gas upward to form an outer ring combustion flame, and the inner ring swirl converging cavity 302 guides the gas upward to form an inner ring combustion flame.

[0039] The outer annular vortex converging cavity 301 has a relatively large space, requiring a larger amount of gas to be introduced, and it is equipped with a multi-inlet structure. Therefore, the space within the outer annular vortex converging cavity 301 is a gradually expanding cavity to assist in gas intake. The inner annular vortex converging cavity 302, on the other hand, has a smaller space and requires a limited amount of gas to be introduced, generally with only one intake point. Therefore, optimization is performed, and one feasible option is adopted: the inner annular vortex converging cavity 302 includes a circular annular channel with a uniform inner diameter. When using the above scheme, the gas directly enters the inner annular vortex converging cavity 302 along the inner annular ejector channel 202, forming a swirling airflow.

[0040] To facilitate the introduction of external air, the ejector channel 2 can be constructed in various forms, and its structure is not limited to a single one. This embodiment optimizes and adopts one feasible option: the ejector channel 2 forms a throat from the ejector opening inward, and a diffusion section is formed from the throat during the diffusion process into the mixing chamber. The inner diameter of the diffusion section gradually increases and connects to the vortex converging chamber 3. When the above scheme is adopted, when the mixed gas is transported to the diffusion section through the throat, the diffusion expansion of the space can promote the formation of negative pressure, improve the efficiency of mixed gas entry, and thus also improve the efficiency of drawing in external air.

[0041] After the gas flows out from the main body of the cover plate 1, stable combustion is formed, requiring optimization of the cover plate 1 structure. This embodiment adopts one feasible option: the cover plate 1 includes a main body, on which an outwardly inclined annular surface is formed. A plurality of combustion holes are uniformly arranged on the annular surface. The combustion holes include high-level holes 101 and low-level holes 102. The widths of the high-level holes 101 and low-level holes 102 are equal, and the length of the high-level hole 101 is greater than the length of the low-level hole 102. When adopting the above scheme, the high-level holes 101 and low-level holes can be uniformly intersected or non-uniformly intersected.

[0042] The flow divider 5 is used to separate the mixing chamber. Its structure can be configured in various forms; this embodiment optimizes and adopts one feasible option: the flow divider 5 includes an intermediate cylinder 501, with an annular panel 502 at its upper end. A plurality of air holes 503 are evenly distributed along the circumference of the annular panel 502, extending obliquely from the lower surface to the upper surface of the annular panel 502. With this design, the flow divider 5 separates the burner's mixing chamber into an upper chamber 103 and a lower chamber 104. Gas from the lower chamber 104 enters the upper chamber 103 after passing through the flow divider 5, maintaining gas flow stability during ignition, ensuring stable and reliable ignition, and preventing deflagration. It also prevents gas backflow, avoiding popping sounds during flameout. Therefore, the flow divider 5 effectively improves the combustion stability and reliability of the burner.

[0043] The specific structure of the vent 503 can be polygonal, curved, or irregular; its structure is not uniquely limited. This embodiment optimizes and adopts one feasible option: the vent 503 includes a horizontal upper port 5031 disposed on the upper surface of the annular panel 502, a guide structure 5032 forming from the upper port to the lower surface of the annular surface, and a vertical port 5033 forming at the end of the guide structure 5032. When the above scheme is adopted, the gas in the lower cavity 104 flows through the guide structure 5032, flowing from below the annular panel 502 to above the annular panel 502, forming an inclined airflow that is distributed circumferentially, thereby forming a stable vortex above the annular panel 502.

[0044] The horizontal upper port 5031 of the vent 503 can be constructed in various forms, and its structure is not limited to a single one. This embodiment optimizes and adopts one feasible option: the horizontal upper port 5031 includes a long side and a short side, with the long side extending to the short side via an arc-shaped edge. When the above scheme is adopted, the arc-shaped edge restricts the guiding space inside the guiding structure 5032. The airflow from the lower cavity 104 to the upper cavity 103 is more likely to maintain its stream shape under the restriction of the arc-shaped edge, avoiding the formation of scattered turbulence.

[0045] The guide plate 4 is used to guide the airflow from the swirling convergence chamber 3 to the mixing chamber. Its structure can be configured in various forms; this embodiment optimizes and adopts one feasible option: the guide plate 4 includes an integrally formed central ring 401 and an outer ring 402. The outer ring 402 is concentrically arranged with the central ring 401. The central ring 401 forms a central through-hole 403 that cooperates with the guide plate. Several guide ports 404 are provided at the edge of the central through-hole 403. When the gas mixture is delivered from the gas ejector pipe to below the guide plate 4, it rises from the guide ports 404 to above the guide plate 4. With this design, the guide plate 4, in conjunction with the gas ejector pipe and the diverter plate 5, orderly guides the mixed gas from the gas ejector pipe to the upper diverter plate 5. The diverter plate 5 is located within the mixing chamber, thereby forming a stable airflow, facilitating subsequent stable combustion. This not only improves the quality of combustion but also helps eliminate deflagration and knocking.

[0046] The central through-hole 403 is used to cooperate with the gas ejector pipe and the flow divider 5. Its structure is not limited to a single type. This embodiment optimizes and adopts one feasible option: the central through-hole 403 includes a circular hole, and the flow guide 404 includes an arc-shaped opening extending outward from the edge of the circular hole. When adopting the above scheme, the number of flow guides 404 in the central through-hole 403 is not limited. When multiple flow guides 404 are provided, the flow guides 404 are evenly spaced along the edge of the circular hole.

[0047] The above are the embodiments listed in this example. However, this example is not limited to the optional embodiments described above. Those skilled in the art can arbitrarily combine the above methods to obtain other various embodiments. Anyone can derive other various forms of embodiments under the guidance of this example. The above specific embodiments should not be construed as limiting the scope of protection of this example. The scope of protection of this example should be defined in the claims.

Claims

1. A top air inlet high efficiency burner characterized by: It includes several ejector channels (2) that cooperate with the gas supply components. The ejector channels (2) cooperate with each other to form a swirling converging cavity (3). A guide plate (4) is provided on the swirling converging cavity (3) to guide the gas to flow upward. A cover plate (1) is provided above the guide plate (4). After the cover plate (1) covers the guide plate (4), it forms an annular mixing cavity. A flow divider (5) is provided in the mixing cavity. The flow divider (5) divides the mixing cavity into an upper cavity (103) and a lower cavity (104).

2. The top air-inflow high-efficiency combustor according to claim 1, characterized by: The ejector channel (2) includes an outer ring ejector channel (201) and an inner ring ejector channel (202). The number of outer ring ejector channels (201) is several and they are evenly distributed along the circumference and connected to the outer ring vortex converging cavity (301). The number of inner ring ejector channels (202) is one and they extend to the inner ring vortex converging cavity (302).

3. The air-entrainment high-efficiency burner according to claim 2, wherein: The inner annular swirling converging cavity (302) includes an annular channel with the inner diameter of the annular channel remaining constant.

4. The top air-inflow high-efficiency combustor according to claim 1, characterized by: The ejector channel (2) forms a throat from the ejector opening inward, and a diffusion section is formed from the throat to the mixing chamber during the diffusion process. The inner diameter of the diffusion section gradually increases and connects to the swirling convergence chamber (3).

5. The top air-inflow high-efficiency combustor according to claim 1, characterized in that: The cover plate (1) includes a cover plate (1) body, and an outwardly inclined annular surface is formed on the cover plate (1) body. A plurality of combustion holes are uniformly arranged on the annular surface. The combustion holes include a high-position hole (101) and a low-position hole (102). The widths of the high-position hole (101) and the low-position hole (102) are equal, and the length of the high-position hole (101) is greater than the length of the low-position hole (102).

6. The top air-inflow high-efficiency combustor according to claim 1, characterized by: The diverter plate (5) includes an intermediate cylinder (501), and an annular panel (502) is provided at the upper end of the intermediate cylinder (501). A number of air holes (503) are evenly distributed along the circumference on the annular panel (502). The air holes (503) extend obliquely from the lower surface of the annular panel (502) to the upper surface of the annular panel (502).

7. The updraft high-efficiency combustor of claim 6, wherein: The vent (503) includes a horizontal upper port (5031) disposed on the upper surface of the annular panel (502), a guide structure (5032) forming from the upper port to the lower surface of the annular surface, and a vertical port (5033) forming at the end of the guide structure (5032).

8. The top air-inflown high efficiency burner of claim 1, wherein: The guide plate (4) includes an integrally formed central ring (401) and an outer ring (402). The outer ring (402) is concentrically arranged with the central ring (401). The central ring (401) forms a central through hole (403) that cooperates with the guide plate. Several guide ports (404) are provided on the edge of the central through hole (403). When the gas mixture of gas and air is transported from the gas injection pipeline to the area below the guide plate (4), it rises from the guide port (404) to the area above the guide plate (4).

9. The updraft high-efficiency combustor of claim 8, wherein: The central through hole (403) includes a circular hole, and the flow guide (404) includes an arc-shaped opening extending outward from the edge of the circular hole.

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