Diffusion type combustion hydrogen stove burner with groove structure
By designing a trench structure diffusion combustion hydrogen stove furnace, the problem of the existing technology being difficult to apply to hydrogen combustion is solved, and the uniform combustion of hydrogen and the effective utilization of hot air are achieved, ensuring the long-term stability and safety performance of the furnace.
Patent Information
- Application Number
- CN202510194959.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2025-04-11
AI Technical Summary
The existing natural gas combustion structures and methods are difficult to apply to hydrogen combustion, resulting in tempering problems and degradation of safety performance.
A trench structure diffusion combustion hydrogen stove head is designed, including a hydrogen distributor, a hydrogen nozzle and a fin tube. Through the design of the outer and inner ring tubes and the structure of the U-shaped groove, uniform combustion of hydrogen and effective utilization of hot air are achieved.
Effectively prevent and reduce air entering the U-shaped tank, limit the hydrogen combustion reaction, ensure that the nozzle and distribution structure are not ablated by high temperatures, maintain long-term stability, and achieve uniform, slow and sufficient combustion air, reducing local high temperature and ablation risks.
Smart Images
Figure CN119802601A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of gas stove burners, and in particular to a groove structure diffusion type combustion hydrogen stove burner. Background Art
[0002] The technology for producing hydrogen has matured and the cost has been significantly reduced. Compared with natural gas, hydrogen has considerable advantages in terms of price and environmental protection, which has opened up broad market prospects for its application in household and commercial gas stoves.
[0003] However, the combustion reaction speed, flame propagation speed and combustion reaction temperature of hydrogen and air after mixing far exceed those of natural gas and liquefied gas. The existing natural gas combustion structure and method are difficult to apply to hydrogen combustion. For example, the common burner head design with an ejector tube, a mixed gas distribution chamber and a fire hole structure is difficult to apply because the conventional aperture fire holes cannot prevent the flame from being transmitted back to the mixed gas distribution chamber; the ceramic microporous combustion plate with a diameter of 1.5 mm and a channel length greater than 12 mm is also difficult to avoid flashback at room temperature; the fire hole channel of the ordinary metal fire cover is also unable to effectively prevent flashback. In addition, the burner head structure with multiple independent nozzles spraying vertically, which is rarely used in commercial gas stoves, has a circular closed structure because the nozzles belong to a closed structure. If deflagration occurs during ignition, the deflagration gas diffusion channel has only upper and lower end outlets, and the gas diffusion resistance is large and the stroke is long. Therefore, the gas pressure will increase rapidly, the flow rate is extremely fast, the deflagration phenomenon is violent, and the noise is loud, which reduces its safety performance and even causes ignition obstacles and unstable operation.
[0004] Based on this, the present invention designs a groove structure diffusion combustion hydrogen stove burner to solve the above problems. Summary of the invention
[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a groove structure diffusion type combustion hydrogen stove burner.
[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A groove structure diffusion combustion hydrogen stove head includes a hydrogen distributor, a hydrogen nozzle and a finned tube, wherein the hydrogen distributor is composed of an outer ring tube and an inner ring tube; a gas introduction circular tube on the left side of the outer wall of the outer ring tube is connected to a threaded circular hole on the outer ring tube, a connection between the hydrogen nozzle and the threaded circular hole on the outer ring tube is hexagonal, and an injection port of the hydrogen nozzle is located above the upper end surface of the outer ring tube; the inner ring tube is similar to the outer ring tube, 2-4 intercommunication tubes are arranged between the inner ring tube and the outer ring tube cavity to communicate with each other, the gas can be evenly distributed to each hydrogen nozzle through the gas introduction circular tube, and hot air provides air for the hydrogen nozzle on the inner ring tube to burn; The fin tube is composed of an upper frame and a lower frame which are nested in different sizes, and the upper frame and the lower frame are coaxially split structures; and the upper frame and the lower frame are connected through a sub-port; The lower frame is composed of a first fixed circular ring, a second fixed circular ring, a first fin and a positioning rib. The diameter of the first fixed circular ring is larger than that of the second fixed circular ring. The second fixed circular ring is sleeved inside the first fixed circular ring, and the second fixed circular ring is fixedly connected to the first fixed circular ring through the positioning rib. The outer rings of the first fixed circular ring and the second fixed circular ring are fixedly mounted with a plurality of first fins, and the first fins are evenly distributed at equal intervals in the outer circumferential array of the first fixed circular ring and the second fixed circular ring. The bottom ends of the first fixed circular ring and the second fixed circular ring are fixedly connected to the upper end of the outer ring tube and the upper end of the inner ring tube respectively. The hydrogen nozzle is located between two adjacent first fins. The inner walls of the first fixed circular ring and the second fixed circular ring are smooth. The lower frame is composed of an outer frame, an inner frame and second fins, the outer frame is fixedly mounted on the upper end of the first fixed ring, the outer rings of the outer frame and the inner frame are fixedly mounted with second fins, and the second fins are evenly distributed in a circular array on the outer frame and the inner frame at equal intervals; Furthermore, the top ends of the outer frame and the inner frame are in a trumpet-shaped shape with an "extension covering" characteristic, forming a gas diversion and diffusion channel and an oil, water and debris shielding eaves; Furthermore, the first fin and the second fin coaxially arranged vertically on the first fixed ring and the outer frame, and the first fixed ring and the outer wall of the outer frame form a same number of U-shaped grooves; the first fin and the second fin coaxially arranged vertically on the second fixed ring and the inner frame, and the second fixed ring and the outer wall of the inner frame also form a same number of U-shaped grooves; the U-shaped grooves are open downwards; Furthermore, the lower end of the first fin is flush with the lower ends of the first fixing ring and the second fixing ring, and the top end of the second fin stops at the trumpet openings at the upper ends of the outer frame and the inner frame; Furthermore, the connection portion between the first fin and the second fin is provided with an interconnecting hole; Furthermore, the positions and numbers of the hydrogen nozzles and the U-shaped grooves correspond one to one, and the hexagonal area of the hydrogen nozzle is located inside the U-shaped groove; Furthermore, the hollow area surrounding the inner ring tube and the outer ring tube forms a hot air ascending channel, and the hot air provides air for the combustion of the hydrogen nozzle on the inner ring tube; Furthermore, the outer ring tube and the inner ring tube are concentrically arranged, and the cross section is a rectangle with a height greater than a width.
[0007] Compared with the prior art, the present invention has the following beneficial effects: the first fixed circular ring and the second fixed circular ring are both fitted with the upper end surface of the hydrogen distributor, which can effectively prevent and reduce the air from entering the U-shaped groove from below and around the hydrogen nozzle, limit the combustion reaction of hydrogen near the hydrogen nozzle, ensure that the hydrogen rises at a relatively low level in the structural part near the hydrogen nozzle, ensure that the nozzle and the distribution structure are not ablated by high temperature, and maintain long-term stability; the first fin separates the gas in the two U-shaped grooves, so that an independent flame is formed between the two first fins, the flame moves upward and is fully mixed with the hot air flow in the hot air rising flow channel, ensuring that the nitrogen flowing in each U-shaped groove can obtain the air required for combustion evenly, slowly and sufficiently; while slowing down the hot air supply in the U-shaped groove area, the rapid supply of hot air after outflow is increased, the local high temperature and ablation probability of the mechanism components are reduced, the heat released by combustion is evenly guided and distributed, the cookware is heated more evenly, and the combustion exhaust gas emission and hot air supply are smoother. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0009] Figure 1 A three-dimensional diagram of a groove structure diffusion combustion hydrogen stove burner of the present invention; Figure 2 It is a front view of the groove structure diffusion combustion hydrogen stove burner of the present invention; Figure 3 For along Figure 2 A three-dimensional image with a portion cut away in the AA direction; Figure 4 This is an exploded view of the groove structure diffusion combustion hydrogen stove burner of the present invention.
[0010] The numbers in the figure represent: 1. Hydrogen distributor; 11. Outer ring tube; 12. Inner ring tube; 2. Hydrogen nozzle; 31. First fixed ring; 32. Second fixed ring; 33. First fin; 34. Outer frame; 35. Outer frame; 36. Second fin; 37. Interconnecting hole; 38. Positioning rib. DETAILED DESCRIPTION
[0011] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0012] The terms “left”, “right”, “front”, “back”, “up” and “down” mentioned in the following description are oriented in the viewing direction of the front view.
[0013] In some embodiments, please refer to the drawings of the specification. Figure 1-Figure 4 , a groove structure diffusion combustion hydrogen stove burner, including a hydrogen distributor 1, and also including: a hydrogen nozzle 2 and a finned tube, the hydrogen distributor 1 is composed of an outer ring tube 11 and an inner ring tube 12, the outer ring tube 11 and the inner ring tube 12 are concentrically arranged, and the cross-section is a rectangle with a height greater than a width; the gas introduction circular tube on the left side of the outer wall of the outer ring tube 11 is connected to the threaded circular hole on the outer ring tube 11, the connection between the hydrogen nozzle 2 and the threaded circular hole on the outer ring tube 11 is hexagonal, and the jet of the hydrogen nozzle 2 is located above the upper end surface of the outer ring tube 11; the inner ring tube 12 is similar to the outer ring tube 11, and 2-4 intercommunication tubes are arranged between the two to make the inner ring tube 12 communicate with the outer ring tube 11 cavity, and the hollow area surrounded by the inner ring tube 12 and the outer ring tube 11 forms a hot air rising channel; and the gas can be evenly distributed to each hydrogen nozzle 2 through the gas introduction circular tube, and the hot air provides air for the combustion of the hydrogen nozzle 2 on the inner ring tube 12; The fin tube is composed of an upper frame and a lower frame which are nested in different sizes, and the upper frame and the lower frame are coaxially split structures; and the upper frame and the lower frame are connected through a sub-port; The lower frame is composed of a first fixed circular ring 31, a second fixed circular ring 32, a first fin 33 and a positioning rib 38. The diameter of the first fixed circular ring 31 is larger than the diameter of the second fixed circular ring 32. The second fixed circular ring 32 is sleeved inside the first fixed circular ring 31, and the second fixed circular ring 32 is fixedly connected to the first fixed circular ring 31 through the positioning rib 38. The outer circles of the first fixed circular ring 31 and the second fixed circular ring 32 are fixedly mounted with a plurality of first fins 33, and the first fins 33 are evenly distributed at equal intervals in the outer circumferential array of the first fixed circular ring 31 and the second fixed circular ring 32. The bottom ends of the first fixed circular ring 31 and the second fixed circular ring 32 are fixedly connected to the upper ends of the outer ring tube 11 and the inner ring tube 12 respectively. The hydrogen nozzle 2 is located between two adjacent first fins 33. The inner walls of the first fixed circular ring 31 and the second fixed circular ring 32 are smooth. The lower frame is composed of an outer frame 34, an inner frame 35 and a second fin 36. The outer frame 34 is fixedly mounted on the upper end of the first fixed ring 31, and the inner frame 35 is fixedly mounted on the upper end of the second fixed ring 32. The tops of the outer frame 34 and the inner frame 35 are in a trumpet shape with an "extension covering" characteristic, forming a gas diversion diffusion channel and an oil and water debris shielding eaves. The outer rings of the outer frame 34 and the inner frame 35 are fixedly mounted with second fins 36, and the second fins 36 are evenly distributed in a circular array with equal spacing on the outer frame 34 and the inner frame 35. The first fins 33 and the second fins 36 coaxially and vertically arranged on the first fixed ring 31 and the outer frame 34 are enclosed with the outer wall of the first fixed ring 31 and the outer frame 34 to form the same number of U-shaped grooves; the first fins 33 and the second fins 36 coaxially and vertically arranged on the second fixed ring 32 and the inner frame 35 are also enclosed with the outer wall of the second fixed ring 32 and the inner frame 35 to form the same number of U-shaped grooves; the U-shaped grooves are open downwards; The positions and quantities of the hydrogen nozzles 2 and the U-shaped grooves correspond one to one, and the hexagonal area of the hydrogen nozzles 2 is located inside the U-shaped grooves; The connecting portion between the first fin 33 and the second fin 36 is provided with an interconnecting hole 37; The lower end of the first fin 33 is flush with the lower ends of the first fixing ring 31 and the second fixing ring 32, and the top end of the second fin 36 ends at the trumpet openings at the upper ends of the outer frame 34 and the inner frame 35; In the present invention, hydrogen is ejected from the hydrogen nozzle 2 through the outer ring tube 11 and the inner ring tube 12. After ignition, the burning flame ignites the mixed gas at the bottom of the first fixed circular ring 31 and the second fixed circular ring 32 at an efficient and fast propagation speed. At this time, the concentration of the mixed gas is relatively high, so it is relatively easy to ignite each other; and at this time, the ignition has a low capacity requirement for the mixed gas, and the process of igniting all the mixed gases in the U-shaped groove is relatively stable, and no deflagration or explosion sound will be generated; Furthermore, since the first fixing ring 31 and the second fixing ring 32 are both in contact with the upper end surface of the hydrogen distributor 1, it is possible to effectively prevent and reduce air from entering the U-shaped groove from below and around the hydrogen nozzle 2, limit the combustion reaction of hydrogen near the hydrogen nozzle 2, ensure that the hydrogen rises at a relatively low level in the structural parts near the hydrogen nozzle 2, ensure that the nozzle and the distribution structure are not ablated by high temperature, and maintain long-term stability; The first fin 33 separates the gases in the two U-shaped grooves, so that an independent flame is formed between the two first fins 33. The flame moves upward and is fully mixed with the hot air flow in the hot air rising channel, ensuring that the nitrogen flowing in each U-shaped groove can obtain the air required for even, slow and sufficient combustion; slowing down the hot air supply in the U-shaped groove area while increasing the rapid supply of hot air after outflow, reducing the local high temperature and ablation probability of the mechanism parts, evenly guiding and distributing the heat released by combustion, making the cookware more evenly heated, and the combustion exhaust gas discharge and hot air supply smoother; When the mixed gas flows to the intercommunication hole 37 at the connection point between the first fin 33 and the second fin 36, since the outer frame 34 and the inner frame 35 are trumpet-shaped and expand outward, the space suddenly expands, and the sudden change of space generates vortex disturbance. The heat of the burning flame is quickly transferred through the intercommunication hole 37 and ignites the hydrogen-air mixed gas flowing in the adjacent U-shaped groove, achieving extremely short flame heat transfer and successful ignition of all the U-shaped groove mixed gases. Due to the one-way opening feature of the U-shaped groove, unlike the existing nozzle or fire tube burner, the gas expansion generated at the moment of ignition can diffuse more quickly, and it is not easy to generate high-pressure and high-speed expanding airflow. Therefore, the ignition is more stable and the noise is lower; at the same time, the small-flow dispersed combustion of multiple U-shaped grooves can make the heat storage temperature rise of all U-shaped groove structural components uniform. The U-shaped groove structural components with reasonable temperature rise can serve as heat exchange carriers and effectively promote high-temperature combustion reactions, which can effectively promote the high-intensity and high-efficiency absorption and utilization of heat by cookware; infrared heat transfer and convection heat transfer interact with each other to improve heat exchange efficiency, and the hydrogen combustion product is water vapor, which does not produce nitrogen oxides, and the structure's own heat storage temperature rise is used to promote effective heat transfer and heat absorption and utilization.
[0014] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A groove structure diffusion combustion hydrogen stove burner, comprising a hydrogen distributor (1), and further comprising: A hydrogen nozzle (2) and a finned tube, wherein the hydrogen distributor (1) is composed of an outer ring tube (11) and an inner ring tube (12); a gas introduction circular tube on the left side of the outer wall of the outer ring tube (11) is connected to a threaded circular hole on the outer ring tube (11); the connection between the hydrogen nozzle (2) and the threaded circular hole on the outer ring tube (11) is hexagonal, and the jet of the hydrogen nozzle (2) is located above the upper end surface of the outer ring tube (11); the inner ring tube (12) is similar to the outer ring tube (11), and 2 to 4 intercommunication tubes are arranged between the inner ring tube (12) and the outer ring tube (11) cavity to communicate with each other, and the gas can be evenly distributed to each hydrogen nozzle (2) through the gas introduction circular tube; The fin tube is composed of an upper frame and a lower frame which are nested in different sizes, and the upper frame and the lower frame are coaxially split structures; and the upper frame and the lower frame are connected through a sub-port; The lower frame is composed of a first fixed circular ring (31), a second fixed circular ring (32), a first fin (33) and a positioning rib (38); the diameter of the first fixed circular ring (31) is larger than the diameter of the second fixed circular ring (32); the second fixed circular ring (32) is sleeved inside the first fixed circular ring (31), and the second fixed circular ring (32) is fixedly connected to the first fixed circular ring (31) via the positioning rib (38); the outer rings of the first fixed circular ring (31) and the second fixed circular ring (32) are both fixedly mounted A plurality of first fins (33) are provided, and the first fins (33) are evenly distributed at equal intervals in an outer circumferential array of a first fixed circular ring (31) and a second fixed circular ring (32); the bottom ends of the first fixed circular ring (31) and the second fixed circular ring (32) are fixedly connected to the upper end of the outer circular tube (11) and the upper end of the inner circular tube (12), respectively; and the hydrogen nozzle (2) is located between two adjacent first fins (33); the inner walls of the first fixed circular ring (31) and the second fixed circular ring (32) are smooth; The lower frame is composed of an outer frame (34), an inner frame (35) and second fins (36); the outer frame (34) is fixedly mounted on the upper end of the first fixed circular ring (31); the outer rings of the outer frame (34) and the inner frame (35) are both fixedly mounted with second fins (36); the second fins (36) are evenly distributed in a circular array at equal intervals on the outer frame (34) and the inner frame (35).
2. The groove structure diffusion combustion hydrogen stove burner according to claim 1, characterized in that: The top ends of the outer frame (34) and the inner frame (35) are in a trumpet-shaped shape with an "extension covering" characteristic, forming a gas diversion and diffusion channel and an oil, water and debris shielding eaves.
3. The groove structure diffusion combustion hydrogen stove burner according to claim 2, characterized in that: The first fin (33) and the second fin (36) coaxially and vertically arranged on the first fixed circular ring (31) and the outer frame (34) are combined with the outer wall of the first fixed circular ring (31) and the outer frame (34) to form a same number of U-shaped grooves; the first fin (33) and the second fin (36) coaxially and vertically arranged on the second fixed circular ring (32) and the inner frame (35) are also combined with the outer wall of the second fixed circular ring (32) and the inner frame (35) to form a same number of U-shaped grooves; the U-shaped grooves are open downwards.
4. According to the groove structure diffusion combustion hydrogen stove burner head of claim 3, the lower end of the first fin (33) is flush with the lower ends of the first fixed ring (31) and the second fixed ring (32), and the top end of the second fin (36) ends at the bell mouth at the upper ends of the outer frame (34) and the inner frame (35).
5. The groove structure diffusion combustion hydrogen stove burner according to claim 4, characterized in that: A mutual hole (37) is provided at the connection portion between the first fin (33) and the second fin (36).
6. The groove structure diffusion combustion hydrogen stove burner according to claim 5, characterized in that: The positions and numbers of the hydrogen nozzles (2) and the U-shaped grooves correspond one to one, and the hexagonal area of the hydrogen nozzles (2) is located inside the U-shaped grooves.
7. The groove structure diffusion combustion hydrogen stove burner according to claim 6, characterized in that: The hollow area surrounding the inner ring tube (12) and the outer ring tube (11) forms a hot air ascending channel, and the hot air provides air for the combustion of the hydrogen nozzle (2) on the inner ring tube (12).
8. The groove structure diffusion combustion hydrogen stove burner according to claim 7, characterized in that: The outer ring tube (11) and the inner ring tube (12) are arranged concentrically, and have a cross-section that is a rectangle with a height greater than a width.