Multi-branch symmetrical heating tube

Abstract

The embodiment of the utility model provides a multi-branch heating tube in a symmetrical shape, and belongs to the technical field of electric heating. The multi-branch heating tube with the symmetrical shape comprises a heating tube which comprises a plurality of branches, and the branches radiate outwards from the geometric center of the shape of the heating tube and are connected with one another through connecting parts; a heating element is arranged in the heating pipe and is distributed along the shape of each branch; the heating element is a heating wire, and the heating element is embedded and fixed in the inner cavity of the heating tube. According to the scheme, through the design of the multi-branch symmetrical shape, heat distribution is optimized, the heating effect is improved, and the structural stability and the material use efficiency of the heating pipe are improved.

Description

Technical Field

[0001] This utility model relates to the field of electric heating technology, and specifically to a heating tube with a multi-branched symmetrical shape. Background Technology

[0002] With the improvement of people's living standards, electric heating appliances such as electric hot pots and electric griddles are widely used in homes and the catering industry. These devices use electric heating elements to convert electrical energy into heat energy, thus cooking food. Common electric hot pots and electric griddles typically use spiral or disc-shaped heating wires as heating elements, whose main advantages are simple structure, mature manufacturing process, and ability to meet basic heating needs. However, with the continuous development of technology, traditional heating elements have gradually revealed some shortcomings in practical applications, particularly in terms of material waste and uneven heat distribution.

[0003] First, traditional spiral heating wires or disc-shaped heating elements often result in material waste during the heating process. These elements mostly use long, thin heating wires, which are bent or coiled to form the heating area. However, due to structural limitations, the layout of the heating wires often cannot precisely match the shape of the device, leading to poor heating in some areas. Furthermore, spiral or disc-shaped heating wires require considerable length to cover the entire heating area, which not only increases manufacturing costs but also causes significant unnecessary material waste.

[0004] Furthermore, existing heating element designs suffer from uneven heat distribution. Due to the relatively simple arrangement of the heating wires, the heat distribution during heating is usually not completely uniform. Especially in heating devices such as electric hot pots and electric griddles, traditional spiral heating wires often overheat in some areas while remaining cool in others, leading to localized overcooking or undercooking during cooking. This uneven heat distribution not only affects the cooking results but also increases energy waste.

[0005] Therefore, the design of existing electric heating elements still has considerable room for improvement in terms of thermal efficiency and material utilization. There is an urgent need for a new heating element design scheme to solve the problems of uneven heat distribution and material waste, improve heating efficiency, reduce energy consumption, and optimize cost and user experience. Utility Model Content

[0006] The purpose of this utility model embodiment is to provide a heating tube with a multi-branch symmetrical shape to solve the problems of thermal efficiency and material utilization in the design of existing electric heating elements.

[0007] To achieve the above objectives, this utility model provides a multi-branch symmetrical heating tube, which includes a heating tube comprising multiple branches, each branch radiating outward from the geometric center of the heating tube and interconnected by a connecting part; the heating tube contains heating elements distributed along the shape of each branch; the heating elements are heating wires, which are embedded and fixed in the inner cavity of the heating tube.

[0008] Optionally, each branch of the heating tube is a curved fan-shaped structure; except for the first branch, the curvature radius of the fan-shaped structures of the other branches is the same; the ends of the first branch are respectively connected to the inlet end and the outlet end of the heating element.

[0009] Optionally, the connection part of each heating element is a circular connection area; the inner surface of the connection part is in close contact with the branch part of the heating element.

[0010] Optionally, the diameter of the heating element is 30±5mm to 50±5mm; and the thickness of the heating element is between 0.5±0.2mm and 2±0.2mm; the inner cavity of the heating element has a channel with a uniform inner diameter.

[0011] Optionally, the heating element is a plurality of heating wires arranged side by side; the ends of the heating wires are fixed by insulating terminals.

[0012] Optionally, the heating element is a single heating wire; the heating wire is wrapped around the branches of the heating tube and embedded in the corresponding branches.

[0013] Optionally, except for the first branch, the starting and ending ends of each other branch are connected by a connecting part; the outer diameter of the connecting part matches the outer diameter of the branch; the cross-section of the connecting part is circular, elliptical, or polygonal.

[0014] Optionally, the outer surface of the heating element is provided with a rust-proof layer.

[0015] Optionally, multiple fixing devices are evenly arranged inside the inner cavity of the heating tube; the fixing devices are composed of annular fixing frames or isolation components, and are used to fix the position of the heating element during installation.

[0016] Optionally, the outer surface of each branch of the heating tube is provided with a plurality of evenly distributed heat dissipation fins; the heat dissipation fins are evenly distributed along the length of the branch to increase the heat exchange area on the surface of the heating tube.

[0017] Through the above technical solution, the multi-branch symmetrical heating tube proposed in this utility model solves the problem of uneven heat distribution in traditional heating elements by designing the heating tube into multiple branches, each radiating outward from the geometric center and connected by a connecting part. The heating element is evenly distributed along the shape of each branch, ensuring that heat can be evenly transferred to each branch area, thereby avoiding local overheating or undercooling and improving heating efficiency and temperature uniformity. In addition, the heating element uses a heating wire, which is embedded and fixed in the inner cavity of the heating tube. This design effectively improves the stability of the heating element and reduces performance degradation caused by loosening or deformation of the heating element. At the same time, by tightly integrating the heating element with the tube structure, the utilization rate of materials is also effectively optimized, reducing unnecessary waste. It can be seen that the multi-branch symmetrical design of this utility model not only optimizes heat distribution and improves heating effect, but also improves the structural stability and material utilization efficiency of the heating tube, resulting in higher heat conduction efficiency.

[0018] Other features and advantages of this utility model embodiment will be described in detail in the following detailed description section. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of a multi-branch symmetrical heating tube provided in one embodiment of the present invention;

[0021] Figure 2 This is a structural schematic diagram of the AA section of a multi-branch symmetrical heating tube provided in one embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures

[0023] 10-Heating tube; 20-Connecting part; 30-Heating element; 40-First branch; 50-Inlet end of heating element; 60-Outlet end of heating element. Detailed Implementation

[0024] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0025] In this embodiment of the utility model, unless otherwise stated, directional terms such as "up," "down," "left," and "right" generally refer to the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use.

[0026] The terms “first,” “second,” “third,” etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0027] The terms "parallel" and "perpendicular" do not mean that the components must be absolutely parallel or perpendicular, but rather that they can be slightly tilted. For example, "parallel" simply means that its direction is more parallel than "perpendicular," not that the structure must be completely parallel, but that it can be slightly tilted.

[0028] Furthermore, terms like "roughly" and "basically" are used to indicate that the content does not require absolute precision, but rather allows for a certain degree of deviation. For example, "roughly equal" does not simply mean absolute equality; in actual production and operation, achieving absolute "equality" is difficult, and a certain degree of deviation is generally present. Therefore, besides absolute equality, "roughly equal to" also includes the aforementioned situation where a certain degree of deviation exists. Using this as an example, in other cases, unless otherwise specified, terms like "roughly" and "basically" have similar meanings.

[0029] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] Please refer to Figure 1 This embodiment provides a multi-branch symmetrical heating tube 10, which includes a heating tube 10, the heating tube 10 including multiple branches, each branch radiating outward from the geometric center of the heating tube 10 and connected to each other through a connecting part 20; the heating tube 10 is provided with a heating element 30, the heating element 30 is distributed along the shape of each branch; the heating element 30 is a heating wire, the heating element 30 is embedded and fixed in the inner cavity of the heating tube 10.

[0031] Preferably, each branch of the heating tube 10 is a curved fan-shaped structure; except for the first branch 40, the curvature radius of the fan-shaped structures of the other branches is the same; the end of the first branch 40 is connected to the inlet end 50 and the outlet end 60 of the heating element, respectively.

[0032] In this embodiment of the invention, each branch of the heating tube 10 adopts a curved fan-shaped structure design. This design allows the heat from each branch to be distributed more evenly throughout the heating area. Specifically, except for the first branch 40, the fan-shaped structures of the other branches have the same radius of curvature. This structural arrangement ensures symmetry and consistency between the branches, contributing to uniform heat distribution during heating and avoiding the problems of localized overheating or underheating caused by structural asymmetry in traditional designs. Furthermore, the ends of the first branch 40 are connected to the inlet and outlet ends of the heating element 30, respectively. This design allows the heating wire of the heating tube 10 to form a complete heating path from the inlet end 50 of the first branch to the outlet end 60 of the heating element, ensuring the stability and consistency of heat transfer in each branch.

[0033] By adopting this fan-shaped structural design, the heating element 10 can evenly heat the entire heating area in a shorter time, and the heat transfer is more efficient. The technical advantage of this structural design lies in its optimized heat distribution and improved heating efficiency, as well as reduced material waste. This is because the size and layout of each branch are carefully calculated to ensure optimal material utilization and lower manufacturing costs. Simultaneously, the heat is transferred evenly.

[0034] Preferably, the connecting portion 20 of each heating element 10 is a circular connecting area; the inner surface of the connecting portion 20 is in close contact with the branch portion of the heating element 10.

[0035] In this embodiment of the invention, the connecting portion 20 of each heating element 10 is a circular connecting area. This circular design not only provides better structural stability but also effectively disperses heat transfer between branches. The circular connecting portion 20 makes the connection between branches more uniform, avoiding the uneven or unstable local heating that may occur in traditional connecting portion 20 designs. Through the circular connecting portion 20, multiple branches of the heating element 10 can more effectively form a whole, resulting in smoother and more uniform heat conduction during heating. At the same time, the inner surface of the connecting portion 20 is in close contact with the branch portion of the heating element 10. This close contact ensures that heat can be quickly and efficiently transferred from the heating element 30 to each branch of the tube body. Due to the close contact, heat will not be excessively lost or unevenly distributed at the connecting portion 20.

[0036] Based on this invention, heat transfer efficiency is effectively improved, ensuring uniform temperature distribution in each branch during heating and avoiding localized overheating or lack of heating. Furthermore, the circular connecting part 20 enhances the overall structural strength of the heating element 10, preventing loosening or detachment of components due to insecure connections. Through this innovative design, the thermal efficiency and stability of the heating element 10 are significantly improved.

[0037] Preferably, the diameter of the heating tube 10 is 30±5mm to 50±5mm; and the thickness of the heating tube 10 is between 0.5±0.2mm and 2±0.2mm; the inner cavity of the heating tube 10 has a channel with a uniform inner diameter.

[0038] In this embodiment of the invention, the diameter of the heating tube 10 is between 30±5mm and 50±5mm, and the thickness of the heating tube 10 is between 0.5±0.2mm and 2±0.2mm. This size range design optimizes heat distribution and conduction efficiency while ensuring the functionality of the heating tube 10. The larger diameter range allows the heating tube 10 to accommodate sufficient heating elements 30 and ensures that heat can be evenly radiated to all parts of the tube during heating. Simultaneously, the thickness design of the heating tube 10 provides sufficient structural strength while ensuring effective heat transfer, avoiding heat accumulation or uneven conduction problems caused by excessive thickness or thinness. Furthermore, the inner cavity of the heating tube 10 has a channel design with a uniform inner diameter, ensuring uniform heat distribution within the tube. The uniformity of the inner cavity channels effectively avoids the problem of uneven heat distribution within the tube, which is common in traditional designs, ensuring relatively consistent heat transfer efficiency in various areas during heating and preventing localized overheating or insufficient heating.

[0039] Based on this invention, the precise dimensions and internal channel design improve the heat conduction performance of the heating element 10, enhance overall heating efficiency, and optimize material usage, avoiding heat loss and excessive energy consumption. Through precise control of the diameter, thickness, and uniformity of the internal channel, the heating element 10 not only improves heating uniformity and stability but also meets the demands for higher efficiency, energy saving, and durability.

[0040] Preferably, the heating element 30 consists of multiple heating wires arranged side by side; the ends of the heating wires are fixed by insulating terminals.

[0041] In this embodiment of the invention, the heating element 30 consists of multiple heating wires arranged side by side. This design improves the overall thermal efficiency of the heating element 30 by arranging multiple heating wires side by side within the heating tube 10. The side-by-side arrangement of multiple heating wires allows heat to be transferred more evenly from the inner cavity of the heating tube 10 to the surface of the tube, thereby improving the uniformity of heat distribution and avoiding localized overheating that may occur with traditional single-wire layouts. Furthermore, the side-by-side arrangement of multiple heating wires also increases the total heat output, providing a larger heating area under the same input power and improving heating efficiency.

[0042] The high density of the heating wires avoids uneven heat distribution, ensuring a consistent temperature in each area. This is especially beneficial in applications requiring rapid heating, effectively reducing heating time and energy waste. Furthermore, the heating wires are secured at their ends with insulating terminals, a design that ensures stability and safety within the heating tube 10. The insulating terminals effectively prevent short circuits between the heating wires and the tube body or other components, enhancing system safety. These design features significantly improve the heat transfer efficiency of the heating element 30. Moreover, this design effectively prevents uneven heating caused by loose or misaligned heating wires, ensuring safe and efficient performance output during heating.

[0043] In another possible implementation, the heating element 30 is a single heating wire; the heating wire is wrapped around the branches of the heating tube 10 and embedded in the corresponding branches.

[0044] In this embodiment of the invention, the heating element 30 is a single heating wire, which is wound around and embedded in the corresponding branches of the heating tube 10. This design, by winding the heating wire into a spiral shape, allows the heating wire to tightly cover each branch area of ​​the entire heating tube 10, thereby enhancing the uniform distribution of heat within the tube. Embedding the heating wire in the corresponding branches ensures that heat is evenly transferred along the length of the heating wire to each branch of the tube, guaranteeing temperature consistency during the heating process. This layout effectively avoids the problem of uneven heat distribution that may occur in traditional designs, thereby reducing local overheating or underheating and improving heating efficiency. Furthermore, the single heating wire, through its embedded nature, makes the design of the heating tube 10 simpler and provides higher structural stability. The embedded heating wire effectively utilizes the space of the heating tube 10, ensuring a larger heating area without the need for a complex layout of multiple heating wires, reducing manufacturing costs and complexity. Simultaneously, this structure also reduces uneven heating and safety hazards caused by loose or misaligned heating wires.

[0045] Based on this invention, the embedded design not only optimizes the uniformity of heat distribution but also improves the working efficiency and stability of the heating wire, reducing material waste. This solution ensures efficient heating while also enhancing the safety and durability of the heating element 10, making it particularly suitable for applications requiring high heating uniformity and stability.

[0046] Preferably, except for the first branch 40, the starting and ending ends of each other branch are connected by a connecting part 20; the outer diameter of the connecting part 20 matches the outer diameter of the branch; the cross-section of the connecting part 20 is circular, elliptical or polygonal.

[0047] In this embodiment of the invention, except for the first branch 40, the starting and ending ends of each other branch are connected by a connecting part 20. This design allows the branches to be stably connected together, forming an integral heating tube 10 structure. The connecting part 20 of each branch is precisely designed to ensure that the connection between the branch and the tube body is not only stable but also effectively transfers heat, preventing heat loss or uneven distribution at the connecting part 20. The outer diameter of the connecting part 20 matches the outer diameter of the branch, ensuring the sealing and stability of the connection and preventing loosening or looseness due to improper dimensions, thereby improving the stability and reliability of the overall structure.

[0048] The cross-section of the connecting part 20 can be circular, elliptical, or polygonal, providing greater flexibility and adaptability, allowing for the selection of the most suitable connection shape according to different application requirements. The choice of circular, elliptical, or polygonal shapes not only ensures a tighter connection but also optimizes hydrodynamic performance, reduces airflow or heat resistance, and ensures efficient heat transfer.

[0049] Preferably, the outer surface of the heating element 10 is provided with a rust-proof layer.

[0050] In this embodiment of the invention, the outer surface of the heating element 10 is provided with an anti-rust layer to improve its corrosion resistance, extend its service life, and ensure long-term stable heating performance. For heating elements of different materials, this invention employs two protective treatment methods: copper plating and bluing. For iron pipes, copper plating is used to form a dense copper layer on the surface to isolate air and moisture, preventing the iron pipe from oxidizing and rusting. For stainless steel pipes, bluing is used to form a stable oxide protective film on the surface, improving its high-temperature resistance and oxidation resistance, while reducing uneven growth of the surface oxide layer.

[0051] The main advantages of copper plating lie in its excellent thermal conductivity and corrosion resistance. The copper layer effectively blocks corrosive substances such as moisture and air from eroding the iron pipe, preventing rust, while maintaining high thermal conductivity to ensure even heat transfer. Copper plating also enhances the mechanical strength of the heating element, reducing material degradation caused by corrosion and ensuring long-term stability. Furthermore, the smooth surface of the copper layer prevents dirt accumulation, improving the cleaning performance of the heating element.

[0052] For stainless steel pipes, bluing (also known as oxidation blackening) is a highly effective protective method. By forming an oxide film on the surface of stainless steel, it effectively enhances its high-temperature resistance, preventing oxidation and structural embrittlement under high-temperature environments. The bluing layer also reduces the propagation of microcracks, improves the fatigue resistance of stainless steel pipes, and keeps them stable during long-term heating operations. In addition, bluing reduces the reflectivity of the metal surface, improving its aesthetics, while also making the pipe surface more resistant to dirt and scratches, reducing maintenance difficulties.

[0053] In summary, this invention significantly improves the corrosion resistance and stability of the heating element 10 by employing copper plating and bluing anti-rust solutions, making it suitable for long-term use in various environments. Whether in humid environments, continuous high-temperature operation, or applications requiring good thermal conductivity, these two anti-rust technologies effectively reduce equipment maintenance costs and ensure that the heating element 10 maintains efficient and safe operation under various working conditions.

[0054] Preferably, a plurality of fixing devices are evenly arranged inside the inner cavity of the heating tube 10; the fixing devices are composed of annular fixing frames or isolation components, and are used to fix the position of the heating element 30 during installation.

[0055] In this invention, multiple fixing devices are evenly arranged inside the heating tube 10. These fixing devices ensure the stable position of the heating element 30 inside the heating tube 10, thereby preventing uneven heating or damage caused by movement or vibration of the heating element 30. The fixing devices consist of an annular fixing frame or an isolating member. The annular fixing frame typically has a circular structure, which tightly wraps around the outside of the heating element 30, ensuring it does not shift during heating. The isolating member maintains an appropriate distance between the heating element 30 and the tube wall by forming multiple isolation areas within the tube, preventing direct contact between the heating element 30 and the tube body, and reducing the risk of overheating and short circuits.

[0056] By evenly arranging these fixing devices within the heating element 10, not only is the stability of the heating element 30 enhanced, but also the uniform conduction of heat within the tube is ensured. The fixing devices effectively prevent the heating wire from loosening or breaking during heating due to thermal expansion or external forces, thus guaranteeing the long-term stable operation of the heating element 30. Furthermore, the fixing devices reduce uneven heat distribution or localized overheating caused by improper positioning of the heating element 30, thereby improving heating efficiency.

[0057] This uniformly distributed fixing device improves the overall structural stability and safety of the heating element 10, ensuring high efficiency and reliability during the heating process. The design of the fixing device not only enhances the mechanical strength of the system but also optimizes the heat transfer path, allowing heat to be distributed more evenly throughout the tube, thus improving the overall heating performance of the equipment.

[0058] Preferably, the outer surface of each branch of the heating tube 10 is provided with a plurality of uniformly distributed heat dissipation fins; the heat dissipation fins are uniformly distributed along the branch length direction to increase the heat exchange area on the surface of the heating tube 10.

[0059] In this invention, the outer surface of each branch of the heating tube 10 is provided with multiple evenly distributed heat dissipation fins. This design significantly improves the heat dissipation efficiency of the heating tube 10. The heat dissipation fins increase the heat exchange area on the surface of the heating tube 10, effectively increasing the rate of heat transfer between the tube and the surrounding environment. During heating, the heating tube 10 generates a large amount of heat, which needs to be quickly and evenly dissipated into the external environment to prevent localized overheating. The uniform distribution of the heat dissipation fins ensures that heat can be effectively dissipated in all areas, avoiding the heat concentration or localized overheating that may occur in traditional designs.

[0060] The heat dissipation fins are evenly distributed along the branch length, further optimizing the thermal management effect of the heating element 10. This arrangement allows the heat dissipation fins to cover a larger area, enhancing heat conduction and diffusion. Whether operating at high temperatures for extended periods or during short heating cycles, the heat dissipation fins maintain a stable temperature for the heating element 10, ensuring it does not overheat during efficient operation.

[0061] The heat dissipation fin design significantly improves heat exchange efficiency, reducing energy waste and component damage caused by overheating. Simultaneously, because the heat dissipation fins can evenly distribute heat, the heating effect of the entire heating element 10 is more balanced, avoiding heat accumulation in traditional designs and improving the safety and reliability of the equipment. Through this innovative design, the heating element 10 not only improves heat dissipation capacity but also increases heating efficiency, optimizes energy utilization, and has lower maintenance costs.

[0062] The optional embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present utility model, various simple modifications can be made to the technical solution of the present utility model, and these simple modifications all fall within the protection scope of the present utility model.

[0063] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the various possible combinations will not be described separately in this embodiment.

[0064] Those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. This program is stored in a storage medium and includes several instructions to cause a microcontroller, chip, or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0065] Furthermore, various different implementation methods of this utility model can be arbitrarily combined, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A heating tube with a multi-branched symmetrical shape, characterized in that, The multi-branch symmetrical heating element includes a heating element, which includes multiple branches, each branch radiating outward from the geometric center of the heating element and connected to each other through a connecting part; The heating element is provided inside the heating tube, and the heating element is distributed along the shape of each branch; The heating element is a heating wire, which is embedded and fixed in the inner cavity of the heating tube.

2. The multi-leg, symmetrically shaped heat-generating tube of claim 1, wherein, Each branch of the heating element is a curved fan-shaped structure; Except for the first branch, the curvature radii of the sector structures in the other branches are the same; The ends of the first branch are connected to the inlet end and the outlet end of the heating element, respectively.

3. The multi-leg, symmetrically shaped heat-generating tube of claim 1, wherein, The connection points of each heating element are circular connection areas; The inner surface of the connector is in close contact with the branch portion of the heating element.

4. The multi-leg, symmetrically shaped heat-generating tube of claim 1, wherein, The diameter of the heating element is 30±5mm to 50±5mm; Furthermore, the thickness of the heating element is between 0.5±0.2mm and 2±0.2mm; The heating element has a channel with a uniform inner diameter inside.

5. The multi-leg, symmetrically shaped heat-generating tube of claim 1, wherein, The heating element consists of multiple heating wires arranged side by side; The end of the heating wire is fixed by an insulating terminal.

6. The multi-branch symmetrical heating tube according to claim 1, characterized in that, The heating element is a single heating wire; The heating wire is wrapped around the branches of the heating tube and embedded in the corresponding branches.

7. The multi-leg, symmetrically shaped heat-generating tube of claim 1, wherein, Except for the first branch, the beginning and end of each other branch are connected by a connecting part; The outer diameter of the connecting part matches the outer diameter of the branch; The cross-section of the connecting part is circular, elliptical, or polygonal.

8. The multi-leg, symmetrically shaped heat-generating tube of claim 1, wherein, The outer surface of the heating element is provided with a rust-proof layer.

9. The multi-leg, symmetrically shaped heat-generating tube of claim 1, wherein, Multiple fixing devices are evenly arranged inside the inner cavity of the heating tube; The fixing device consists of a ring-shaped fixing frame or an isolating component, and is used to fix the position of the heating element during installation.

10. The multi-leg, symmetrically shaped heat-generating tube of claim 1, wherein, The outer surface of each branch of the heating element is provided with multiple evenly distributed heat dissipation fins. The heat dissipation fins are evenly distributed along the branch length direction to increase the heat exchange area on the surface of the heating tube.

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