Flat electric heating tube structure

Abstract

The utility model discloses a flat electric heating tube structure, which relates to the technical field of configuration of electric heating elements and comprises a shell, arc-shaped parts are arranged on two sides of the shell, a large area of the middle of the shell is a shell plane, radiating fins are arranged on the shell plane, a plurality of magnesium powder rods are arranged in the shell, resistance wires are annularly wound on the magnesium powder rods, and the magnesium powder rods are connected with corresponding lead-out rods. A certain gap is arranged between the magnesium powder rod and the inner wall of the tube, the gap and the shell are filled with fillers, the electric heating tube is of a flat structure, resistance wires with different diameters can be wound on the magnesium powder rod so as to achieve different resistance, different powers are achieved by adjusting the PCB, power adjustment is achieved by changing the combination of the connecting lead-out rods, and the electric heating tube is convenient to use. And control is more flexible.

Description

Technical Field

[0001] This utility model relates to the field of electric heating element configuration technology, and in particular to a flat electric heating tube structure. Background Technology

[0002] Currently, the traditional single-ended tube uses a "single magnesium powder rod + round tube" structure, where the resistance wire is evenly wound around a cylindrical magnesium powder rod. The double-ended tube uses a round tube, with an internal "spiral resistance wire + filled magnesium powder". The resistance wire converts electrical energy into heat energy, and the heat generated is transferred to the entire tube surface through the insulation layer.

[0003] In the prior art, a flat electric heating tube heater disclosed in patent publication number CN2346134Y is mainly composed of heat sink, electric heating tube and upper and lower pressure plates. Its feature is that the cross-section of the electric heating tube is flat or elliptical, the heat sink is set on both sides of the electric heating tube and is fastened together by the upper and lower pressure plates. Power adjustment cannot be realized in this patent. Utility Model Content

[0004] The purpose of this invention is to solve the problem of poor heat dissipation in existing electric heating tube structures. This invention features finned heat sinks, which are composed of several L-shaped fins, resulting in a larger heat dissipation area and providing an electric heating tube structure with better heat dissipation.

[0005] Another objective of this invention is to solve the problem of inconvenient power adjustment of existing electric heating tubes. This invention sets up several magnesium powder rods and achieves multi-power adjustment by changing the connection method of the lead rods. Even if one of them fails, it will not affect the heating. This provides an electric heating tube structure that is easy to adjust.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a flat electric heating tube structure, comprising arc-shaped portions on both sides of the shell, a large area in the middle being a shell plane, heat sinks arranged on the shell plane, a plurality of magnesium powder rods arranged inside the shell, resistance wires wound in a ring around the magnesium powder rods, the magnesium powder rods being connected to corresponding lead rods, a certain gap being provided between the magnesium powder rods and the inner wall of the tube, the gap and the shell being filled with filler, and the electric heating tube having a flat structure.

[0007] Preferably, the heat sink has a fin-shaped structure, consisting of several stacked L-shaped fins.

[0008] Preferably, the L-shaped pieces are hollow grooves.

[0009] Preferably, the magnesium powder rod is provided with a lead-out rod limiting hole, which fixes the relative positions of the lead-out rod and multiple magnesium powder rods.

[0010] Preferably, the bottom of the shell is a magnesium powder base, and a groove structure is provided on the magnesium powder base to facilitate the positioning of the magnesium powder rod. Preferably, one end of the lead-out rod is fixed on the magnesium powder rod limiting hole, and the magnesium powder rod is fixed in relative position by the lead-out rod.

[0011] Preferably, the bottom of the housing is an end cap.

[0012] Preferably, the end cap has a U-shaped structure.

[0013] Preferably, the spacing between the lead-out rods is equal, and each pair of lead-out rods is connected to a magnesium powder rod.

[0014] Preferably, the lead-out rod and the magnesium powder rod are placed vertically.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: The magnesium powder rod of this utility model can be wound with resistance wires of different diameters to achieve different resistances, thereby achieving different power by adjusting the PCB board. The power adjustment achieved by changing the combination of connecting leads is more flexible. Compared with the solution that requires stacking the number of heating tubes to achieve different power, the use of multiple magnesium powder rods internally reduces the use of parts such as tubes, magnesium powder bases, and end caps, resulting in a significant reduction in cost. At the same time, it occupies less space and is lighter, providing integrated space for the design of the overall heater, which is more in line with the design concept of lightweight and integrated design.

[0016] This invention adopts a flat tube structure with finned heat sinks welded to the surface, resulting in a larger heat dissipation area, higher thermal efficiency, increased product lifespan, reduced overheating risk, and lower failure probability.

[0017] This invention features several magnesium powder rods, each internally independent. If one part breaks and fails, the others can still maintain a certain working effect, resulting in good heating performance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0019] Figure 2 for Figure 1 Enlarged view of a section at point C.

[0020] Figure 3 This is a top view of the main structure of this utility model.

[0021] Figure 4 This is a schematic diagram of the two magnesium powder rods placed in this utility model.

[0022] Figure 5 This is a schematic diagram of the three magnesium powder rods placed in this utility model.

[0023] In the diagram: 1. Shell; 11. Arc-shaped part; 12. Side plate; 2. Lead-out rod; 3. Heat sink; 31. L-shaped plate; 32. Hollow slot; 4. End cap; 5. Magnesium powder rod; 6. Resistance wire; 7. Magnesium powder base; 8. Filler. Detailed Implementation

[0024] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. The described embodiments are only some embodiments of this utility model, and not all embodiments.

[0025] Example 1: Refer to Figures 1 to 5 In this embodiment, the heating element shell is made of a flat tube, internally carrying multiple magnesium powder rods 5, lead rods 2, resistance wires 6, and a stainless steel end cap 4 welded to the bottom. A magnesium powder base 7 is also installed. The top of the heating element is sealed with epoxy resin or other materials. The magnesium powder rods 5 are fixed in relative position by being installed in the holes of the magnesium powder rods 5 through the grooves on the magnesium powder base 7 and the lead rods 2. The resistance wires 6 are wound around two magnesium powder rods 5 respectively. The resistance wires 6 on one magnesium powder rod 5 are connected to two of the lead rods 2, and the resistance wires 6 on the other magnesium powder rod 5 are connected to the other two lead rods 2. The two magnesium powder rods 5 do not interfere with each other. At least three power operating modes can be realized under rated voltage by controlling the connection method between the PCB board and the lead rods. Taking the dual magnesium powder rod structure as an example, each magnesium powder rod can be wound with resistance wires of different diameters to achieve different resistances, thereby achieving different power by adjusting the PCB board. Assuming that the upper lead rod 2 is A, B, C, and D in sequence, the power of lead rod 2 connected to the A and D terminals alone is X, the power of lead rod 2 connected to the B and C terminals alone is Y, and the power of lead rod 2 connected to the A, B, C, and D terminals simultaneously is X+Y.

[0026] Example 2: Refer to Figures 1 to 5 A flat heating element structure is described, with arc-shaped sections 11 on both sides of the shell 1 and a large central flat surface, providing ample space for the installation of the heat sink 3. This ensures that the heat sink can be evenly distributed on the shell surface. Compared to the commonly used cylindrical heating elements, the flat heating element has a significant advantage in heat dissipation, with a larger heat dissipation area. The heat sink 3 is composed of multiple stacked L-shaped fins 31, significantly increasing the contact area between the heat sink and the surrounding air, thereby improving heat dissipation efficiency. When the heating element is running, the heat generated inside is transferred to the heat sink through the shell. The finned heat sink can quickly dissipate the heat to the surrounding environment, effectively reducing the operating temperature of the heating element and extending its service life.

[0027] The hollow slots 32 between the L-shaped fins 31 further enhance heat dissipation. The hollow slot design promotes good air convection between the heat sink fins, accelerating heat transfer. This design not only improves heat dissipation efficiency but also reduces the weight of the heat sink, lowering material costs while maintaining structural stability. In practical applications, after rigorous testing, this finned heat sink design has performed excellently in heating equipment requiring long-term continuous operation. It can maintain a stable operating temperature, reduce the risk of failure due to overheating, and improve the overall operating efficiency and safety of the equipment.

[0028] The housing 1 contains multiple magnesium powder rods 5, with resistance wires 6 wound in a ring around each rod. When current flows through the resistance wires 6, the wires generate heat. The magnesium powder rods 5 are connected to corresponding lead-out rods 2, which act as electrical connections, allowing current to flow smoothly into the resistance wires. A certain gap exists between the magnesium powder rods 5 and the inner wall of the tube, and this gap, along with the interior of the housing 1, is filled with filler material 8. The filler material is typically a material with excellent thermal conductivity and insulation properties, such as magnesium oxide powder. The main function of the filler material 8 is to evenly conduct the heat generated by the heating wire to all parts of the housing 1, and then dissipate it into the surrounding environment with the help of components such as the heat sink 3, thereby improving the heating efficiency and thermal stability of the heating tube. Simultaneously, the filler material 8 provides insulation, preventing short circuits between the heating wire and the housing 1 or other conductive components, ensuring electrical safety during the use of the heating tube. Furthermore, the filler material 8 also provides support and fixation for the internal components, reducing relative displacement and vibration between components and enhancing the overall structural stability of the heating tube. During the manufacturing process, the filling process and filling amount of filler 8 must be strictly controlled to ensure uniform and dense filling, so as to give full play to its functions of heat conduction, insulation and support.

[0029] A lead-out rod limiting hole is provided on the magnesium powder rod 5 to fix the relative position of the lead-out rod 2 and multiple magnesium powder rods 5. Due to factors such as thermal expansion and contraction, the internal components of the heating element may shift. The lead-out rod limiting hole can effectively limit this displacement, ensuring the performance and safety of the heating element. For example, during the frequent start-up and shutdown of the heating element, the rapid temperature change will cause the components to expand and contract, but the lead-out rod limiting hole can fix the position of the lead-out rod and magnesium powder rod, preventing problems such as poor contact or short circuit caused by displacement.

[0030] The bottom of the housing 1 is a magnesium powder base 7, which has a groove-like structure for positioning the magnesium powder rod 5. This positioning method supports and fixes the magnesium powder rod from the bottom, combined with the top fixing of the lead-out rod limiting hole, so that the magnesium powder rod maintains a precise position within the housing. This can prevent the magnesium powder rod from shifting due to factors such as vibration and temperature changes, thereby improving the stability and reliability of the heating element.

[0031] One end of the lead-out rod 2 is fixed to the limiting hole of the magnesium powder rod. This connection method ensures tight contact and good electrical conductivity between the lead-out rod and the magnesium powder rod. The magnesium powder rod 5 is fixed in relative position by the lead-out rod 2. The bottom of the housing 1 is equipped with an end cap 4. The end cap 4 is designed to seal and protect, preventing external impurities from entering the interior of the heating element. At the same time, it supports and fixes the internal components such as the magnesium powder rod. The end cap 4 is U-shaped, which allows it to better fit the bottom shape of the housing, providing a tighter seal and enhancing the strength of the end cap, enabling it to withstand certain external pressure and impact. For example, in some applications where the heating element needs to operate in humid or corrosive gas environments, the end cap design can effectively prevent external impurities from entering the interior of the heating element, protect internal components from corrosion, and extend the service life of the heating element.

[0032] Example 3: Reference Figures 1 to 5 A flat heating element structure is described in this embodiment. The shell 1 has arc-shaped sections 11 on both sides, and a large central shell plane provides sufficient space for the installation of the heat sink 3, ensuring that the heat sink is evenly distributed on the shell surface. Furthermore, the flat structure offers a larger heat dissipation area compared to the commonly used cylindrical shape. The heat sink 3 consists of several stacked L-shaped fins 31, a design that offers significant advantages in heat dissipation. The fin-shaped structure greatly increases the contact area between the heat sink and the surrounding air, thereby improving heat dissipation efficiency. When the heating element is working, the heat generated inside is transferred to the heat sink through the shell. The fin-shaped heat sink can dissipate heat to the surrounding environment more quickly, effectively reducing the operating temperature of the heating element and extending its service life.

[0033] The hollow slots 32 between the L-shaped fins 31 further enhance the heat dissipation effect. The presence of the hollow slots allows for good air convection between the heat sink fins, accelerating heat transfer. This design not only improves heat dissipation efficiency but also makes the heat sink relatively lightweight, reducing material costs while maintaining structural stability. In practical applications, after rigorous testing, in a heating device that needs to operate continuously for extended periods, the heating element with this finned heat sink design can maintain a stable operating temperature, reducing the risk of failure due to overheating and improving the overall operating efficiency and safety of the equipment.

[0034] The housing 1 contains several magnesium powder rods 5, with resistance wires 6 wound in a ring around them. When current flows through the resistance wires 6, the wires generate heat. The magnesium powder rods 5 are connected to corresponding lead-out rods 2, which act as electrical connections, allowing current to flow smoothly into the resistance wires. A certain gap exists between the magnesium powder rods 5 and the inner wall of the tube. This gap and the housing 1 are filled with filler 8, typically a material with excellent thermal conductivity and insulation properties, such as magnesium oxide powder. The main function of filler 8 is to evenly conduct the heat generated by the heating wire to all parts of the housing 1, and then dissipate it into the surrounding environment through components such as the heat sink 3, thereby improving the heating efficiency and thermal stability of the heating element. Simultaneously, filler 8 provides insulation, preventing short circuits between the resistance wire and the housing 1 or other conductive components, ensuring electrical safety during use. Furthermore, filler 8 also provides support and fixation for the internal components, reducing relative displacement and vibration between components and improving the overall structural stability of the heating element. During the manufacturing process, the filling process and amount of filler 8 need to be strictly controlled to ensure that the filling is uniform and dense, so as to give full play to its functions of heat conduction, insulation and support.

[0035] A lead-out rod limiting hole is provided on the magnesium powder rod 5, which fixes the relative position of the lead-out rod 2 and multiple magnesium powder rods 5. Through the lead-out rod limiting hole, internal components may shift due to factors such as thermal expansion and contraction. The lead-out rod limiting hole effectively restricts this displacement, ensuring the performance and safety of the heating element. For example, during the frequent start-up and shutdown of the heating element, the rapid temperature change will cause the components to expand and contract, but the lead-out rod limiting hole can effectively fix the position of the lead-out rod and magnesium powder rod, preventing problems such as poor contact or short circuits caused by displacement.

[0036] The bottom of the housing 1 is a magnesium powder base 7, on which a groove-like structure is provided to position the magnesium powder rod 5. This positioning method supports and fixes the magnesium powder rod from the bottom, and combined with the top fixing of the lead-out rod limiting hole, it ensures that the magnesium powder rod maintains a precise position within the housing, preventing displacement caused by vibration, temperature changes, or other factors, thereby improving the stability and reliability of the heating element. For example, in some equipment where the heating element needs to operate in a vibrating environment, this all-around positioning system can ensure the stability of the internal structure of the heating element and guarantee its normal operation.

[0037] One end of the lead-out rod 2 is fixed to the limiting hole of the magnesium powder rod. This connection method ensures tight contact and good electrical conductivity between the lead-out rod and the magnesium powder rod. The magnesium powder rod 5 is fixed in relative position by the lead-out rod 2. The bottom of the housing 1 is the end cap 4. The design of the end cap 4 serves to seal and protect, preventing external impurities from entering the interior of the heating element. It also supports and fixes the internal components such as the magnesium powder rod. The end cap 4 has a U-shaped structure. The U-shaped design allows the end cap to better fit the bottom shape of the housing, providing a tighter seal and increasing the strength of the end cap, enabling it to withstand certain external pressure and impact. For example, in applications where the heating element needs to operate in humid or corrosive gas environments, the sealing design of the end cap can effectively prevent external impurities from entering the interior of the heating element, protect internal components from corrosion, and extend the service life of the heating element.

[0038] The lead-out rods 2 are spaced equally, and each pair of lead-out rods 2 is connected to a magnesium powder rod 5. This equally spaced lead-out rod layout makes the heating structure inside the heating tube evenly distributed, ensuring that the heating tube can generate a uniform heat distribution when working, thus improving the uniformity and efficiency of heating. The lead-out rods 2 and the magnesium powder rods 5 are placed vertically.

[0039] The heating element's structure, through the design and rational layout of its components, features an efficient heat dissipation design that allows it to maintain a low temperature during prolonged operation, effectively extending its lifespan and reducing maintenance costs. Secondly, the precise positioning and secure connection of internal components ensure the stability and reliability of the heating element, reducing the risk of malfunctions caused by component displacement or loosening. Furthermore, uniform heat distribution and high energy conversion efficiency enhance the heating performance of the heating element, enabling it to reach the set temperature more quickly and maintain a stable heating effect.

[0040] For those skilled in the art, this utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model.

Claims

1. A flat electric heating tube structure, characterized in that, The shell includes arc-shaped sections on both sides and a large flat surface in the middle. Heat sinks are installed on the flat surface of the shell. Several magnesium powder rods are installed inside the shell, with resistance wires wound in a ring around the magnesium powder rods. The magnesium powder rods are connected to corresponding lead rods. A certain gap is provided between the magnesium powder rods and the inner wall of the tube. The gap and the shell are filled with filler. The heating tube has a flat structure.

2. The flat electric heating tube structure according to claim 1, characterized in that, The heat sink has a fin-shaped structure, consisting of several stacked L-shaped fins.

3. The flat electric heating tube structure according to claim 2, characterized in that, The L-shaped pieces are separated by hollow grooves.

4. A flat electric heating tube structure according to claim 1 or 3, characterized in that, The magnesium powder rod is provided with a lead-out rod limiting hole, which fixes the relative position of the lead-out rod and multiple magnesium powder rods.

5. The flat electric heating tube structure according to claim 4, characterized in that, The bottom of the shell is made of magnesium powder, and a groove-like structure is set on the magnesium powder base to position the magnesium powder rod.

6. The flat electric heating tube structure according to claim 5, characterized in that, One end of the lead-out rod is fixed to the limiting hole of the magnesium powder rod, and the magnesium powder rod is fixed in a relative position by the lead-out rod.

7. A flat electric heating tube structure according to claim 1 or 6, characterized in that, The bottom of the casing is an end cap.

8. A flat electric heating tube structure according to claim 7, characterized in that, The end cap has a U-shaped structure.

9. A flat electric heating tube structure according to claim 1 or 8, characterized in that, The lead-out rods are spaced equally apart, and each pair of lead-out rods is connected to a magnesium powder rod.

10. A flat electric heating tube structure according to claim 1, characterized in that, The lead-out rod and the magnesium powder rod are placed vertically.

Images