A furnace core structure

Abstract

This utility model relates to the field of stove technology, specifically a stove core structure, including an inner tube and an outer tube. The inner tube is open at the bottom and closed at the top, while the outer tube is closed at the bottom and open at the top. The space between the inner and outer tubes forms a combustion chamber. Several air inlet pipes are evenly arranged around the circumference of the outer tube at its lower part. Ventilation openings are also provided at the lower and upper parts of the outer tube. Several evenly arranged ventilation openings are provided on the wall of the inner tube. This utility model replaces ventilation openings with evenly distributed air inlet pipes at the lower part of the outer tube. On the one hand, this prevents the combustion flame at the bottom of the combustion chamber from escaping through the ventilation openings at the lower part of the outer tube. On the other hand, the air inlet pipes guide air into the bottom of the combustion chamber more orderly, providing a sufficient and stable oxygen supply for fuel combustion at the bottom. This solves the technical problems of existing stove core structures easily causing flame escape during combustion and fuel waste due to incomplete combustion within the combustion chamber.

Description

Technical Field

[0001] This utility model relates to the field of stove technology, specifically a stove core structure. Background Technology

[0002] Methanol fuel, as a clean energy source, boasts advantages such as complete combustion and low pollutant emissions, gradually becoming an important alternative to traditional fossil fuels. Especially in heating and cooking, methanol-fueled stoves have garnered widespread attention due to their environmental friendliness and economic efficiency. However, the combustion characteristics of methanol place high demands on the stove core structure design, requiring the reduction of fuel consumption while ensuring combustion efficiency. This presents challenges to the oxygen supply design, heat distribution, and fuel vaporization control of the stove core.

[0003] Prior art CN220892232U discloses a methanol fuel furnace core, which is installed inside a furnace body. The furnace core is cylindrical and has a mounting plate and fuel pipe. The bottom of the furnace core is closed and has a fuel tank for receiving fuel. Multiple combustion holes are provided in the upper, middle, and lower parts of the furnace core wall; specifically as follows... Figure 1 As shown, the combustion holes are arranged in 3 rows on the upper part of the inner and outer tube walls, 2 rows on the lower part, and only 1 row in the middle.

[0004] However, the above-mentioned furnace core structure still has the following technical problems in use:

[0005] 1. The design of the combustion hole at the bottom of the outer tube makes it easy for the bottom flame to escape, which can easily cause safety hazards. It also makes the combustion unconcentrated, causing some fuel to be lost before it is fully burned in the combustion chamber, resulting in fuel waste and reduced combustion efficiency.

[0006] 2. The combustion holes on the inner tube are only located in three parts: upper, middle, and lower. The uneven distribution makes it impossible for the fuel to receive a continuous and uniform oxygen supply during the vaporization and ascent process. This can easily lead to unstable fuel combustion, flame flickering, partial flameout, and other issues, affecting the completeness and continuity of combustion, and ultimately reducing combustion efficiency and heat transfer effect. Utility Model Content

[0007] This utility model provides a furnace core structure that can solve the technical problems of existing furnace core structures having ventilation openings at the bottom of the outer tube, which can easily cause flames to escape during combustion, and the flames to dissipate before fully burning in the combustion chamber, resulting in fuel waste.

[0008] This application provides the following technical solution:

[0009] A furnace core structure includes an inner tube and an outer tube. The inner tube is open at the bottom and closed at the top, while the outer tube is closed at the bottom and open at the top. The space between the inner tube and the outer tube forms a combustion chamber. The lower part of the outer tube is provided with several air inlet pipes that are evenly arranged around the circumference of the outer tube. Ventilation openings are also provided at the lower and upper parts of the outer tube. The inner tube is provided with several evenly arranged ventilation openings on its wall.

[0010] Beneficial effects:

[0011] 1. By replacing the vent with a uniformly distributed air inlet pipe at the bottom of the outer tube, on the one hand, the combustion flame at the bottom of the combustion chamber can be prevented from escaping from the vent at the bottom of the outer tube, thereby damaging the components around the furnace core and creating a safety risk; on the other hand, the air inlet pipe can guide air into the bottom of the combustion chamber in a more orderly manner, providing a sufficient and stable oxygen supply for the combustion of fuel at the bottom. The orderly air intake method helps the fuel and oxygen to mix fully, thereby improving combustion efficiency, reducing incomplete combustion of fuel, and reducing energy waste.

[0012] 2. By setting vents at the bottom and middle of the outer tube, the vent in the middle is omitted. After the fuel vaporizes during the first combustion at the bottom, it is supplied with oxygen by the evenly distributed vents on the inner tube during the ascent for the second combustion. During this process, the even oxygen supply from the vents on the inner tube allows the fuel to burn continuously and stably during the ascent, further improving combustion efficiency and making the flame distribution more uniform. After reaching the top, oxygen is supplied by the vents on the outer tube for the third combustion. This three-stage combustion design greatly improves the degree of fuel combustion, reduces fuel residue, and improves energy utilization efficiency.

[0013] 3. By setting uniform ventilation openings on the inner tube, on the one hand, a continuous and uniform oxygen supply can be provided for the vaporized fuel during its ascent; on the other hand, it helps to regulate the airflow in the inner tube, making the flame more stable. A stable flame can ensure the continuity and stability of the combustion process, avoid problems such as flame flickering and partial flameout, and further improve combustion efficiency and heat transfer effect.

[0014] Furthermore, the lower part of the outer tube is also equipped with a cylindrical protective shell, with an open top and the air inlet pipe located inside the protective shell.

[0015] Beneficial effects:

[0016] 1. The protective cover provides physical protection for the air intake duct, preventing mechanical damage such as collisions and scratches from external objects, and preventing dust and debris from entering the air intake duct.

[0017] 2. The protective shell can stabilize the air pressure around the air inlet pipe to a certain extent. During the operation of the furnace core, the air pressure inside the combustion chamber will change. If the air inlet pipe is directly exposed to the external environment, the fluctuation of the external air pressure may affect the stability of the air entering the air inlet pipe. The protective shell can form a relatively stable air pressure environment, reduce the impact of external air pressure fluctuations on the air intake, and ensure the smooth progress of the combustion process.

[0018] 3. The protective shell can block the heat radiation generated by combustion from affecting the external environment to a certain extent. Especially when there are other flammable or temperature-sensitive components around the furnace core, the protective shell can play a role in heat insulation and protect these components from high temperature.

[0019] Furthermore, the air intake pipe has a J-shaped structure, with the bottom end of the air intake pipe set on the outer pipe wall and connected to the combustion chamber, and the top end of the air intake pipe having an opening that is lower than the opening of the protective cover.

[0020] Beneficial effects:

[0021] 1. The J-shaped structure increases the path length of airflow within a limited space. When air enters from the top opening of the air intake pipe, it flows along the curved path of the J-shape. During this process, the airflow speed and direction change, which is conducive to better heat exchange and mixing between the air and the surrounding environment. This makes the temperature and composition of the air entering the combustion chamber more uniform, providing better combustion conditions for fuel combustion and thus improving combustion efficiency.

[0022] 2. The J-shaped structure also plays a certain role in buffering, preventing outside air from directly impacting the combustion chamber at high speed, allowing the air to enter in a more stable state, which helps maintain the stability of combustion in the combustion chamber.

[0023] Furthermore, the upper shell wall of the protective cover is provided with a U-shaped groove, and the top of the protective cover is also provided with an outwardly extending mounting plate, which is provided with an arc-shaped groove.

[0024] Beneficial effects: The U-shaped and arc-shaped grooves facilitate the entry of air into the protective shell and into the air inlet pipe; the outward-extending mounting plate facilitates the installation of the furnace core inside the furnace body.

[0025] Furthermore, the ratio of the inner diameter of the inner tube to the inner diameter of the outer tube is 1:(3-4).

[0026] Beneficial effects:

[0027] 1. The space between the inner and outer tubes constitutes the combustion chamber. This size ratio allows for a reasonable distribution of space within the combustion chamber. When the inner diameter of the inner tube is relatively small and the inner diameter of the outer tube is relatively large, the combustion chamber has sufficient space to accommodate fuel vapor and air, ensuring thorough mixing of fuel and air. However, if the inner diameter of the inner tube is too large, it will compress the space within the combustion chamber, resulting in insufficient mixing of fuel and air and affecting combustion efficiency. If the inner diameter of the inner tube is too small, although the increased space within the combustion chamber is beneficial for combustion, it will also consume a lot of fuel, leading to rapid fuel consumption and increased operating costs.

[0028] 2. This ratio allows the combustion zone to be reasonably distributed between the inner and outer tubes, and the flame can burn stably around the inner tube and near the inner wall of the outer tube, avoiding problems such as unstable flame, flickering or partial flameout.

[0029] Furthermore, the diameter of the vent on the inner tube is smaller than the diameter of the vent on the outer tube.

[0030] Beneficial effects: The airflow formed by the small-diameter vents on the inner tube is relatively stable, allowing the flame to maintain a stable shape around the inner tube. A stable flame helps maintain the continuity and stability of combustion, avoiding phenomena such as flickering, jumping, or partial flameout. The larger vent diameter on the outer tube allows more air to enter, providing sufficient oxygen for the expansion and spread of the flame. The flame can burn and spread more fully in the space between the outer and inner tubes, resulting in a wider combustion range and more uniform heat distribution.

[0031] Furthermore, several layers of ventilation openings are evenly arranged on the inner tube, each layer including 2 ventilation openings, and the ventilation openings of adjacent layers are staggered.

[0032] Beneficial effects: The two vents on each floor are evenly distributed, which allows oxygen to enter the inner tube more evenly. The staggered arrangement of the vents on adjacent floors further ensures that oxygen can be evenly distributed at different heights and in the circumferential direction of the inner tube. In addition, the staggered arrangement of the vents can also make the airflow form a more complex and uniform flow pattern in the inner tube, which helps to stabilize the flame and prevent the flame from deflecting or concentrating on one side due to the imbalance of airflow.

[0033] Furthermore, a ventilation opening is provided at the bottom of the outer pipe, and this ventilation opening is located in the area of ​​the outer pipe near the top of the air inlet pipe.

[0034] Beneficial effects: The placement of the ventilation openings in this area allows the incoming air to mix thoroughly with the air from the air intake duct and fuel vapor at the bottom of the combustion chamber. The air and fuel vapor come into full contact, forming a uniform combustible mixture, which creates conditions for stable and efficient combustion. The more uniform the mixture, the more complete the combustion reaction, and the more stable the flame propagation, which can further improve the combustion effect.

[0035] Furthermore, two layers of ventilation openings are provided on the upper part of the outer pipe, and the number of ventilation openings in the upper layer is less than the number of ventilation openings in the lower layer.

[0036] Beneficial effects: The fewer upper vents can constrain and guide the flame, preventing it from spreading excessively upwards and maintaining a stable flame shape; the more lower vents provide sufficient oxygen to maintain the intensity and height of the flame. The cooperation between the upper and lower vents ensures stable combustion of the flame within the combustion chamber, reduces flame flickering and jumping, ensures the continuity of the combustion process, and thus improves thermal efficiency.

[0037] Furthermore, a retractable tube is also provided at the top of the outer tube.

[0038] Beneficial effects: The converging cylinder has a converging and restraining effect on the flame, preventing the flame from spreading disorderly at the top, and confining the flame and hot air to a smaller area. This allows the heat to be transferred to external energy-consuming equipment more concentratedly, reducing heat loss and improving energy utilization efficiency. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of a furnace core using existing technology;

[0040] Figure 2 This is a schematic diagram of the furnace core structure of this utility model;

[0041] Figure 3 for Figure 2 A sectional view;

[0042] Figure 4 for Figure 2 A diagram of the mounting plate is omitted.

[0043] Figure 5 for Figure 2 Top view. Detailed Implementation

[0044] The following detailed description illustrates the specific implementation method:

[0045] The markings in the accompanying drawings include: inner pipe 1, combustion chamber 12, vent 102, outer pipe 2, air inlet pipe 3, protective cover 4, U-shaped groove 41, mounting plate 5, arc groove 51, and retractable tube 6.

[0046] Example 1

[0047] like Figure 2-3As shown, a furnace core structure includes an inner tube 1 and an outer tube 2. The inner tube 1 is open at the bottom and closed at the top, while the outer tube 2 is closed at the bottom and open at the top. The space between the inner tube 1 and the outer tube 2 forms a combustion chamber 12. The lower part of the outer tube 2 is provided with several air inlet pipes 3 evenly arranged around the circumference of the outer tube 2. The lower and upper parts of the outer tube 2 are also provided with ventilation openings 102. The inner tube 1 is provided with several evenly arranged ventilation openings 102 on its tube wall, and the diameter of the ventilation openings 102 on the inner tube 1 is smaller than the diameter of the ventilation openings 102 on the outer tube 2.

[0048] In this embodiment, a cylindrical protective shell 4 is also provided at the lower part of the outer tube 2. The bottom of the protective shell 4 is welded to the tube wall of the outer tube 2, and the top of the protective shell 4 is open; specifically as follows: Figure 4 As shown, a U-shaped groove 41 is also provided on the upper shell wall of the protective cover 4, such as... Figure 2 As shown, the top of the protective shell 4 is also provided with an outwardly extending mounting plate 5, and the mounting plate 5 is provided with an arc-shaped groove 51. The mounting plate 5 is used to install the entire furnace core into the furnace body, and the arc-shaped groove 51 on the mounting plate 5 and the U-shaped groove 41 on the side wall of the protective shell 4 facilitate the entry of air into the protective shell 4.

[0049] The air inlet duct 3 is located inside the protective casing 4, specifically as follows: Figure 3 As shown, the air intake pipe 3 has a J-shaped structure. The bottom end of the air intake pipe 3 is welded to the wall of the outer pipe 2 and communicates with the combustion chamber 12. The top end of the air intake pipe 3 is open and lower than the opening of the protective cover 4. The number of air intake pipes 3 can be set to 4-8 as needed, such as... Figure 5 As shown, in this embodiment, six air inlet pipes 3 are preferably provided and are evenly distributed around the outer pipe 2.

[0050] In this embodiment, the J-shaped air inlet duct 3 increases the path length of airflow within a limited space. When air enters from the top opening of the air inlet duct 3, it flows along the curved path of the J-shape. During this process, the airflow speed and direction change, which is beneficial for better heat exchange and mixing between the air and the surrounding environment. This makes the temperature and composition of the air entering the combustion chamber 12 more uniform, providing better combustion conditions for fuel combustion and thus improving combustion efficiency. In addition, the J-shaped structure also plays a certain buffering role, preventing outside air from directly impacting the combustion chamber 12 at high speed, allowing the air to enter in a more stable state, which helps maintain the stability of combustion within the combustion chamber 12.

[0051] In this embodiment, several layers of ventilation openings 102 are uniformly arranged on the inner pipe 1, each layer including 2 ventilation openings 102, and adjacent layers of ventilation openings 102 are staggered; a layer of ventilation openings 102 is arranged at the bottom of the outer pipe 2, and this layer of ventilation openings 102 is located in the area of ​​the outer pipe 2 near the top of the air inlet pipe 3, so that the incoming air and the air from the air inlet pipe 3 and the fuel vapor are fully mixed at the bottom of the combustion chamber 12, and the air and fuel vapor are in full contact to form a uniform combustible mixture, creating conditions for stable and efficient combustion.

[0052] Two layers of ventilation openings 102 are provided on the upper part of the outer pipe 2, with the number of upper ventilation openings 102 being less than the number of lower ventilation openings 102. The upper and lower ventilation openings 102 cooperate with each other to ensure stable combustion of the flame within the combustion chamber 12, reducing flame flickering and jumping phenomena, ensuring the continuity of the combustion process, and thus improving thermal efficiency. More preferably, in this embodiment, a converging cylinder 6 is also provided at the top of the outer pipe 2. The converging cylinder 6 has a flame-gathering and restraining effect, preventing the flame from spreading disorderly at the top, and confining the flame and hot air to a smaller area, enabling heat to be transferred more concentratedly to external energy-consuming equipment, reducing heat loss, and improving energy utilization efficiency.

[0053] During use, the fuel undergoes three combustion processes within the furnace core:

[0054] First combustion: The vent 102 at the bottom of the outer pipe 2 and the air inlet pipe 3 supply oxygen to the bottom of the combustion chamber 12. The J-shaped air inlet pipe 3 can act as a buffer, allowing air to enter in a more stable state, which helps maintain the stability of combustion in the combustion chamber 12. On the other hand, it can optimize the air flow path, guide air to enter the bottom of the combustion chamber 12 more orderly, and prevent the flame from shooting out from the bottom of the combustion chamber 12. This bottom combustion design allows the fuel to make full use of the bottom space, improving fuel utilization and combustion efficiency.

[0055] Secondary combustion: During the ascent of the vaporized fuel, oxygen is supplied by the evenly distributed vents 102 on the inner tube 1 for secondary combustion. This design avoids the problem of uneven flame distribution caused by excessive oxygen supply in the middle. The even oxygen supply from the vents 102 on the inner tube 1 enables the fuel to burn continuously and stably during the ascent, further improving combustion efficiency and making the flame distribution more uniform.

[0056] Third combustion: After reaching the top, oxygen is supplied by the vent 102 on the outer pipe 2 for the third combustion. The fuel that has not been completely burned after the first two combustions reacts again with the oxygen entering through the vent 102 on the outer pipe 2 at the top, ensuring that the fuel is fully burned. This three-stage combustion design greatly improves the degree of fuel combustion, reduces fuel residue, and improves energy utilization efficiency.

[0057] Example 2

[0058] The difference between this embodiment and Embodiment 1 is that the ratio of the inner diameter of the inner tube 1 to the inner diameter of the outer tube 2 is 1:(3-4). Specifically, in this embodiment, the inner diameter of the inner tube 1 is 20mm, and the inner diameter of the outer tube 2 is 70mm. This size ratio can reasonably allocate the space within the combustion chamber 12. When the inner diameter of the inner tube 1 is relatively small and the inner diameter of the outer tube 2 is relatively large, the combustion chamber 12 has enough space to accommodate fuel vapor and air, allowing the fuel and air to mix thoroughly. However, if the inner diameter of the inner tube 1 is too large, it will compress the space of the combustion chamber 12, resulting in insufficient mixing of fuel and air and affecting combustion efficiency. If the inner diameter of the inner tube 1 is too small, although the increased space of the combustion chamber 12 is beneficial to combustion, it will also consume a lot of fuel, leading to excessively rapid fuel consumption and increased operating costs.

[0059] The above are merely embodiments of this utility model, and the utility model is not limited to the field covered by this embodiment. Commonly known structures and characteristics in the solutions are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A core structure comprising an inner tube having an open bottom and a closed top, and an outer tube having a closed bottom and an open top, the space between the inner tube and the outer tube forming a combustion chamber; characterized in that, The lower part of the outer pipe is provided with several air inlet pipes that are evenly arranged around the circumference of the outer pipe. Ventilation openings are also provided at the lower and upper parts of the outer pipe. The inner pipe is provided with several evenly arranged ventilation openings on its wall.

2. A core structure according to claim 1, wherein: The lower part of the outer tube is also provided with a cylindrical protective shell, the top of which is open, and the air inlet pipe is located inside the protective shell.

3. A core construction according to claim 2, wherein: The air inlet pipe has a J-shaped structure. The bottom end of the air inlet pipe is set on the outer pipe wall and communicates with the combustion chamber. The top end of the air inlet pipe is open and is lower than the opening of the protective cover.

4. A core construction according to claim 3, wherein: The upper shell of the protective cover is provided with a U-shaped groove, and the top of the protective cover is also provided with an outwardly extending mounting plate, which is provided with an arc-shaped groove.

5. A core structure according to any one of claims 1-4, characterized in that: The ratio of the inner diameter of the inner tube to the inner diameter of the outer tube is 1:(3-4).

6. A core construction according to claim 5 wherein: The diameter of the vent on the inner tube is smaller than the diameter of the vent on the outer tube.

7. A core construction according to claim 6 wherein: The inner tube is evenly provided with several layers of ventilation openings, each layer including 2 ventilation openings, and the ventilation openings of adjacent layers are staggered.

8. A core construction according to claim 7 wherein: A ventilation opening is provided at the bottom of the outer pipe, and this ventilation opening is located in the area of ​​the outer pipe near the top of the air inlet pipe.

9. A core construction according to claim 8 wherein: The upper part of the outer pipe is provided with two layers of ventilation openings, and the number of ventilation openings in the upper layer is less than the number of ventilation openings in the lower layer.

10. A core construction according to claim 1 or 9 wherein: The top of the outer tube is also equipped with a gathering tube.

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