Automobile aluminum alloy section bar capable of dissipating heat efficiently

Abstract

The utility model relates to the field of aluminum alloy sections, in particular to an automobile aluminum alloy section capable of dissipating heat efficiently. According to the technical scheme, an L-shaped groove is formed in a bottom profile plate, a bottom V-shaped plate is arranged in the L-shaped groove, a wedge-shaped plate is arranged between the bottom profile plates, a fan is arranged at the upper end of the wedge-shaped plate, a lower end connecting plate is arranged at the upper end of the fan, grooves are formed in the two sides of the lower end connecting plate, and protruding blocks are connected to the grooves in a wedge shape; and an upper end connecting plate is arranged at the upper end of the protruding block, a top profile plate is arranged at the upper end of the upper end connecting plate, a vertical groove is formed in the top profile plate, a top V-shaped plate is arranged in the vertical groove, and cooling fins are arranged at the upper end of the top V-shaped plate. The bottom V-shaped plate is fixed in the L-shaped groove, the top V-shaped plate is fixed in the vertical groove, the bottom V-shaped plate and the top V-shaped plate are both provided with V-shaped hollowed-out parts, the longitudinal ventilation effect is enhanced, the wedge-shaped plate is connected with the bottom profile plate, the draught fan blows air, and vertical ventilation is achieved.

Description

Technical Field

[0001] The utility model relates to the field of aluminum alloy profiles, in particular to an automobile aluminum alloy profile with high-efficiency heat dissipation. Background Art

[0002] Aluminum alloy profiles are the most widely used type of non-ferrous metal structural materials in industry.

[0003] Most existing aluminum alloy profiles are separate aluminum alloy plates, and most aluminum alloy profiles are formed in one piece, so there is no ventilation and heat dissipation structure. At the same time, when the aluminum alloy profile is used, it is inconvenient to disassemble and assemble because it is an integral structure.

[0004] Therefore, in view of the fact that most of the existing aluminum alloy profiles are separate aluminum alloy plates, which lack heat dissipation and are inconvenient to disassemble and assemble, an automotive aluminum alloy profile with efficient heat dissipation can be designed to solve the above problems. Utility Model Content

[0005] In order to overcome the shortcomings that most existing aluminum alloy profiles are separate aluminum alloy plates, and most aluminum alloy profiles are formed in one piece, due to the overall structure, it is inconvenient to disassemble and assemble, and there is no ventilation and heat dissipation structure, so the aluminum alloy profile may overheat when used.

[0006] The technical solution of the utility model is as follows: an automotive aluminum alloy profile with high efficiency in heat dissipation comprises a bottom profile plate, an L-shaped groove, a bottom V-shaped plate, a wedge-shaped plate, a fan, a lower end connecting plate, a groove, a convex block, an upper end connecting plate, a top profile plate, a vertical groove, a top V-shaped plate, and heat dissipation fins. An L-shaped groove is provided inside the bottom profile plate, a bottom V-shaped plate is provided inside the L-shaped groove, a wedge-shaped plate is provided between the bottom profile plates, a fan is provided at the upper end of the wedge-shaped plate, a lower end connecting plate is provided at the upper end of the fan, grooves are provided on both sides of the lower end connecting plate, and a wedge-shaped connecting plate on the groove There is a protrusion, and the upper end of the protrusion is provided with an upper end connecting plate, the upper end of the upper end connecting plate is provided with a top profile plate, the interior of the top profile plate is provided with a vertical groove, the interior of the vertical groove is provided with a top V-shaped plate, and the upper end of the top V-shaped plate is provided with a heat dissipation fin. It is supported externally by the bottom profile plate and the top profile plate, and supported internally by the bottom V-shaped plate and the top V-shaped plate, and longitudinal ventilation is achieved at the same time. When the fan is started, the wind is sucked into the space enclosed by the lower end connecting plate and the top profile plate from the wedge plate to achieve vertical ventilation. The heat dissipation fins absorb heat and enhance the heat dissipation effect.

[0007] Preferably, the ventilation and heat dissipation effects are enhanced by arranging vertical and longitudinal ventilation.

[0008] Preferably, the bottom V-shaped plates are arranged in sequence inside the L-shaped groove.

[0009] Preferably, the bottom profile plate, L-shaped groove and bottom V-shaped plate are arranged as a group, and there are two groups in total, which are symmetrically arranged. The two groups of bottom profile plates, L-shaped grooves and bottom V-shaped plates are wedge-shaped connected by wedge-shaped plates, and ventilation grooves are provided on the wedge-shaped plates.

[0010] Preferably, seven fans are provided at the upper end of the wedge-shaped plate, and the fans are arranged in sequence in a longitudinal direction.

[0011] Preferably, a lower connecting plate is provided at the upper end of the fan, an upper connecting plate is provided at the upper end of the lower connecting plate, ventilation holes are provided on both the lower connecting plate and the upper connecting plate, and the lower connecting plate and the upper connecting plate are connected as wedge-shaped slots through grooves and protrusions.

[0012] Preferably, the top V-shaped plate is arranged inside the vertical groove, and the vertical groove and the top V-shaped plate are arranged as a group, with two groups in total, and the two groups are respectively arranged on both sides of the top profile plate.

[0013] Preferably, the heat dissipation fins are arranged at the upper end portion of the top profile plate and are connected to the top profile plate by a wedge-shaped slot, and seven heat dissipation fins are provided.

[0014] Beneficial effects of the utility model:

[0015] 1. By setting the bottom profile plate and the top profile plate as external profile support installation work, external protection is provided at the same time. The bottom V-shaped plate is fixed in the L-shaped groove, and the top V-shaped plate is fixed in the vertical groove. The bottom V-shaped plate and the top V-shaped plate are both provided with V-shaped hollowing to enhance the longitudinal ventilation effect. At the same time, the V-shaped setting facilitates internal support. The wedge-shaped plate connects the bottom profile plate, and the fan blows air to achieve vertical ventilation. The lower end connecting plate is provided with a groove, and the upper end connecting plate is fixed with a protrusion. The groove and the protrusion are wedge-shaped and easy to achieve quick disassembly and assembly. The heat dissipation fins realize heat dissipation at the top, and efficient heat dissipation is achieved through longitudinal and vertical ventilation and heat dissipation. It overcomes the shortcomings that most existing aluminum alloy profiles are separate aluminum alloy plates, and most aluminum alloy profiles are integrally formed. Due to the integral structure, disassembly and assembly are inconvenient, and there is no ventilation and heat dissipation structure, so overheating may occur when the aluminum alloy profile is used;

[0016] 2. By setting the bottom profile plate and the top profile plate as the external profile support installation work, external protection is provided at the same time. The bottom V-shaped plate is fixed in the L-shaped groove, and the top V-shaped plate is fixed in the vertical groove. The bottom V-shaped plate and the top V-shaped plate are both provided with V-shaped hollows to enhance the longitudinal ventilation effect. At the same time, the V-shaped setting facilitates internal support. The wedge-shaped plate connects the bottom profile plate, and the fan blows air to achieve vertical ventilation. The lower end connecting plate is provided with a groove, and the upper end connecting plate is fixed with a protrusion. The groove and the protrusion are wedge-shaped and easy to achieve quick disassembly and assembly. The heat dissipation fins realize heat dissipation at the top. Through longitudinal and vertical ventilation and heat dissipation, efficient heat dissipation of the automotive aluminum alloy profile is achieved; BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shown is a schematic diagram of the three-dimensional structure of the automotive aluminum alloy profile with high efficiency heat dissipation of the utility model;

[0018] Figure 2 Shown is a schematic diagram of the top profile plate of the automotive aluminum alloy profile with high efficiency heat dissipation of the present utility model;

[0019] Figure 3 Shown is a schematic diagram of the groove of the automotive aluminum alloy profile with high efficiency heat dissipation of the utility model;

[0020] Figure 4 Shown is a schematic diagram of the automotive aluminum alloy profile fan with high efficiency heat dissipation of the utility model;

[0021] Explanation of the accompanying drawings: 1. bottom profile plate; 2. L-shaped groove; 3. bottom V-shaped plate; 4. wedge-shaped plate; 5. fan; 6. lower end connecting plate; 7. groove; 8. protrusion; 9. upper end connecting plate; 10. top profile plate; 11. vertical groove; 12. top V-shaped plate; 13. heat sink fin. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Among the existing feasible technologies, as the country pays more attention to ecological environment protection and the concept of green environmental protection deepens, the dependence on wood for furniture and other products has been reduced. Aluminum alloy profiles have become more and more popular, and aluminum products have replaced wood products more and more. As the main source of materials, the aluminum alloy profile market has also been born.

[0024] The main characteristics of aluminum alloy profiles include formability. Aluminum has specific tensile strength, yield strength, ductility, and a corresponding work hardening rate, which determine its formability. It is also recyclable. Aluminum is highly recyclable, with recycled aluminum being virtually indistinguishable from virgin aluminum. Recycling is inexpensive and very environmentally friendly. Other properties include being non-toxic and non-flammable.

[0025] The formation of aluminum alloy profiles begins with aluminum bar casting. The aluminum ingot is heated and melted, and a certain amount of alloying elements (magnesium and silicon) are added. The profiles are then cast into round bars of varying diameters by a casting machine. The aluminum profiles are then extruded. The aluminum bars are heated to a specific temperature, reaching the critical point of aluminum liquefaction. They are then cut and hot-sheared, then fed into an extruder and extruded through a die to create the desired cross-sectional shape. They are then quenched using either air or water cooling. Air cooling results in a T5 finish, while water cooling results in a T6 finish. After extrusion, the profiles are pulled out by a haul-off machine, cut to the desired length using a hot saw, and then moved to a straightening machine on a mobile cooling bed for straightening. (Aluminum profiles are soft when they are first extruded.) After straightening, they are cut to length using a cut-to-length saw and loaded onto a transfer rack for aging. The profiles are heated to a specific temperature in an aging furnace and held there for 2-3 hours, significantly improving the mechanical properties, particularly the hardness, of the aluminum profiles. Anodizing: A sulfuric acid solution is connected to a DC power supply anode, causing a redox reaction. This then forms a dense, porous oxide film on the surface, which is then sealed. This makes the aluminum profile more wear-resistant and corrosion-resistant. Electrostatic spraying: Using the Faraday effect of the electric field, tiny powder coating particles are evenly adsorbed onto the surface, protecting the aluminum profile.

[0026] A key indicator of aluminum alloy profiles is their appearance quality. Anodized profiles must not have defects that affect their performance, such as electrical burns or oxide film detachment. The paint film on electrophoretic, powder-coated, and fluorocarbon-coated profiles must be uniform, neat, and smooth, and must not have wrinkles, cracks, bubbles, flow marks, inclusions, or paint detachment. However, a partial absence of film within 80mm of the profile end is permitted. The appearance quality of aluminum alloy architectural profiles affects the decorative effect of a building. Therefore, factory-produced profiles must be coated to prevent scratches, dents, and corrosion during transportation and stacking. Some commercially available aluminum alloy architectural profiles exhibit internal cavities resembling water marks and moldy spots, indicating defects in the production process. Profile wall thickness is a major factor affecting the strength of a machined part. The main profile is the stress-bearing part in a project. For example, the minimum nominal wall thickness of the main profile for exterior windows must not be less than 1.4mm. Extruded aluminum alloy profiles lack strong surface corrosion resistance and require surface treatment to enhance their corrosion resistance, wear resistance, and aesthetic appearance. Anodized aluminum film thickness grades are AA10, AA15, AA20, and AA25, while electrophoretic paint film thickness grades are A, B, and S. The minimum local coating thickness on powder-coated aluminum decorative surfaces is ≥40μm. The paint layer thickness requirements for fluorocarbon-coated aluminum decorative surfaces vary depending on the coating type: the average film thickness for two coats is ≥30μm, the average film thickness for three coats is ≥40μm, and the average film thickness for four coats is ≥65μm. The chemical composition and mechanical properties of aluminum alloy profiles vary depending on the grade and delivery state. Customers should verify these specifications against the standards (contract). Color and color shading vary between alloys of different grades and delivery states. When selecting an alloy grade and delivery state, it is recommended to fully consider the impact of color and color inconsistencies on the building structure. Salt spray corrosion resistance, abrasion resistance, weathering resistance, and mortar resistance are important technical parameters of aluminum alloy profiles, reflecting their performance and influencing their use.

[0027] When purchasing aluminum alloy profiles, check the product quality certificate, which should include the supplier name, product name and specifications, alloy grade, supply status, film thickness level, and color. Check the product markings, including the product name, alloy grade, supply status, product specifications, and QS mark (aluminum profiles are products issued with an industrial production license). Check the appearance quality, measure the length and weight, and compare the color. When requesting a custom length, the allowable deviation for nominal lengths less than or equal to 6m is + / -15mm. For profiles delivered in multiple lengths, the allowable deviation is + / -20mm.

[0028] The production process of aluminum alloy profiles primarily involves extrusion. The process by which a round ingot is pressed through a die into a profile is a form change. Once the extruded profile is produced, the product is largely complete. After extrusion, the profiles all require heat treatment, commonly known as aging, to achieve a relatively high hardness. Some heat-treated aluminum profiles do not require surface treatment and are referred to as aluminum profile blanks, also known as base material or raw material. Most heat-treated aluminum profiles require surface treatment to achieve aesthetic appeal and oxidation resistance. Surface treatment methods include anodizing, electrophoresis, powder coating, fluorocarbon paint spraying, and wood grain transfer printing. Both anodized and electrophoretic profiles can be colored or uncolored. Long-length anodizing can produce aluminum profiles in both natural and black colors. After surface treatment, the aluminum profiles can be packaged and stored. Some products requiring further processing can proceed directly to further processing without packaging. Some aluminum products require very high surface finishes and require further processing before surface treatment (for example, anodizing for small parts). This significantly increases costs and results in a relatively high price.

[0029] In actual production, if aluminum products are used instead of wooden products, a large amount of forest destruction can be avoided every year, which is beneficial to the protection of forest resources. Therefore, the widespread use of aluminum alloy profiles is of great significance to the protection of the ecological environment.

[0030] The applications of aluminum alloys in automobiles include: cast aluminum alloys are mainly used to manufacture engine cylinder blocks, clutch housings, rear axle housings, steering gear housings, transmissions, valve trains, oil pumps, water pumps, rocker covers, wheels, engine frames, brake calipers, oil cylinders, brake discs and other non-engine components; deformed aluminum alloys are mainly used in automobiles to manufacture doors, trunks and other body panels, bumpers, engine hoods, wheel spokes, hubcaps, wheel exterior covers, brake assembly protective covers, mufflers, anti-lock braking systems, heat exchangers, body frames, seats, trunk floors and other structural parts as well as decorative parts such as dashboards.

[0031] Aluminum boasts low density and excellent corrosion resistance. Its excellent plasticity makes it suitable for casting, forging, and stamping, making it the most suitable die-casting process for automotive parts production. Aluminum alloys have become an indispensable material in automotive production, based on factors such as production cost, part quality, and material utilization.

[0032] See also Figures 1-4The utility model provides an embodiment: an automotive aluminum alloy profile with high efficiency heat dissipation, comprising a bottom profile plate 1, an L-shaped groove 2, a bottom V-shaped plate 3, a wedge-shaped plate 4, a fan 5, a lower end connecting plate 6, a groove 7, a protrusion 8, an upper end connecting plate 9, a top profile plate 10, a vertical groove 11, a top V-shaped plate 12, and a heat dissipation fin 13. The bottom profile plate 1 is provided with an L-shaped groove 2 inside, the bottom V-shaped plate 3 is provided inside the L-shaped groove 2, a wedge-shaped plate 4 is provided between the bottom profile plates 1, a fan 5 is provided at the upper end of the wedge-shaped plate 4, a lower end connecting plate 6 is provided at the upper end of the fan 5, grooves 7 are provided on both sides of the lower end connecting plate 6, and a wedge-shaped connecting plate 7 is provided on the groove 7. There is a protrusion 8, the upper end of the protrusion 8 is provided with an upper connecting plate 9, the upper end of the upper connecting plate 9 is provided with a top profile plate 10, the interior of the top profile plate 10 is provided with a vertical groove 11, the interior of the vertical groove 11 is provided with a top V-shaped plate 12, and the upper end of the top V-shaped plate 12 is provided with a heat dissipation fin 13. It is externally supported by the bottom profile plate 1 and the top profile plate 10, and internally supported by the bottom V-shaped plate 3 and the top V-shaped plate 12, and longitudinal ventilation is achieved at the same time. The fan 5 is started to suck wind from the wedge plate 4 into the space enclosed by the lower connecting plate 6 and the top profile plate 10, so as to achieve vertical ventilation, and the heat dissipation fins 13 absorb heat to enhance the heat dissipation effect. The bottom profile plate 1 and the top profile plate 10 are external profile support installation work and provide external protection. The bottom V-shaped plate 3 is fixed in the L-shaped groove 2, and the top V-shaped plate 12 is fixed in the vertical groove 11. The bottom V-shaped plate 3 and the top V-shaped plate 12 are both provided with V-shaped hollows to enhance the longitudinal ventilation effect. At the same time, the V-shaped setting facilitates internal support. The wedge plate 4 connects the bottom profile plate 1, and the fan 5 blows air to achieve vertical ventilation. The bottom V-shaped plate 3 is arranged in sequence inside the L-shaped groove 2. The bottom profile plate 1, L-shaped groove 2 and bottom V-shaped plate 3 are arranged as a group, and there are two groups in total. The two groups are symmetrically arranged. The two groups of bottom profile plates 1, L-shaped groove 2 and bottom V-shaped plates 3 are connected in a wedge shape by a wedge plate 4. The wedge plate 4 is provided with ventilation slots. Seven fans 5 are provided at the upper end of the wedge plate 4, and the fans 5 are arranged in sequence in the longitudinal direction. The upper end of the fan 5 is provided with a lower connecting plate 6, and the upper end of the lower connecting plate 6 is provided with an upper connecting plate 9. Both the lower connecting plate 6 and the upper connecting plate 9 are provided with ventilation holes, and the lower connecting plate 6 and the upper connecting plate 9 are connected by a groove 7 and a protrusion 8 as a wedge-shaped slot. The top V-shaped plate 12 is provided inside the vertical groove 11, and the vertical groove 11 and the top V-shaped plate 12 are provided as a group, with a total of two groups, and the two groups are provided on both sides of the top profile plate 10. The heat dissipation fins 13 are provided at the upper end of the top profile plate 10 and are connected to the top profile plate 10 as a wedge-shaped slot. There are seven heat dissipation fins 13. The lower connecting plate 6 is provided with a groove 7, and the upper connecting plate 9 is fixed with a protrusion 8. The groove 7 and the protrusion 8 are wedge-shaped connected to facilitate quick disassembly and assembly. The heat dissipation fins 13 are achieved at the top, and the heat dissipation is achieved through longitudinal and vertical ventilation.

[0033] During work, the bottom profile plate 1 and the top profile plate 10 are external profile support installation work and external protection is performed at the same time. The bottom V-shaped plate 3 is fixed in the L-shaped groove 2, and the top V-shaped plate 12 is fixed in the vertical groove 11. The bottom V-shaped plate 3 and the top V-shaped plate 12 are both provided with V-shaped hollowing to enhance the longitudinal ventilation effect. At the same time, the V-shaped setting facilitates internal support. The wedge-shaped plate 4 connects the bottom profile plate 1, and the fan 5 blows air to achieve vertical ventilation. The lower end connecting plate 6 is provided with a groove 7, and the upper end connecting plate 9 fixes the protrusion 8. The groove 7 and the protrusion 8 are wedge-shaped connected to facilitate quick disassembly and assembly. The heat dissipation fins 13 realize heat dissipation at the top, and all work is completed through longitudinal and vertical ventilation and heat dissipation.

[0034] Through the above steps, the bottom profile plate 1 and the top profile plate 10 are set as external profile support installation work, and external protection is provided at the same time. The bottom V-shaped plate 3 is fixed in the L-shaped groove 2, and the top V-shaped plate 12 is fixed in the vertical groove 11. The bottom V-shaped plate 3 and the top V-shaped plate 12 are both provided with V-shaped hollows to enhance the longitudinal ventilation effect. At the same time, the V-shaped setting is convenient for internal support. The wedge plate 4 is connected to the bottom profile plate 1, and the fan 5 blows air to achieve vertical ventilation. The lower end connecting plate 6 is provided with a groove 7, and the upper end connecting plate 9 is fixed with a protrusion 8. The groove 7 and the protrusion 8 are wedge-shaped and easy to achieve quick disassembly and assembly. The heat dissipation fins 13 are used to achieve heat dissipation at the top, and efficient heat dissipation is achieved through longitudinal and vertical ventilation and heat dissipation. The present invention overcomes the shortcomings that most existing aluminum alloy profiles are separate aluminum alloy plates, and most aluminum alloy profiles are integrally formed. Due to the integral structure, it is inconvenient to disassemble and assemble, and there is no ventilation and heat dissipation structure, so the aluminum alloy profile may overheat when in use.

[0035] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the purpose of the present invention.

Claims

1. An automotive aluminum alloy profile with high heat dissipation efficiency, comprising a bottom profile plate (1), characterized in that: The heat dissipation device further comprises an L-shaped groove (2), a bottom V-shaped plate (3), a wedge-shaped plate (4), a fan (5), a lower end connecting plate (6), a groove (7), a protrusion (8), an upper end connecting plate (9), a top profile plate (10), a vertical groove (11), a top V-shaped plate (12), and a heat dissipation fin (13). The bottom profile plate (1) is provided with an L-shaped groove (2) inside, the bottom V-shaped plate (3) inside the L-shaped groove (2), a wedge-shaped plate (4) is provided between the bottom profile plates (1), a fan (5) is provided at the upper end of the wedge-shaped plate (4), a lower end connecting plate (6) is provided at the upper end of the fan (5), grooves (7) are provided on both sides of the lower end connecting plate (6), a protrusion (8) is wedge-connected on the groove (7), and the protrusion (8) is provided. ) is provided with an upper end connecting plate (9), the upper end of the upper end connecting plate (9) is provided with a top profile plate (10), the interior of the top profile plate (10) is provided with a vertical groove (11), the interior of the vertical groove (11) is provided with a top V-shaped plate (12), and the upper end of the top V-shaped plate (12) is provided with a heat dissipation fin (13). The bottom profile plate (1) and the top profile plate (10) are used for external support, and the bottom V-shaped plate (3) and the top V-shaped plate (12) are used for internal support, thereby realizing longitudinal ventilation at the same time. When the fan (5) is started, wind is sucked from the wedge plate (4) into the space enclosed by the lower end connecting plate (6) and the top profile plate (10), realizing vertical ventilation, and the heat dissipation fin (13) absorbs heat to enhance the heat dissipation effect.

2. The automotive aluminum alloy profile with high heat dissipation efficiency according to claim 1, characterized in that: The bottom V-shaped plates (3) are arranged in sequence inside the L-shaped grooves (2).

3. The automotive aluminum alloy profile with high heat dissipation efficiency according to claim 1, characterized in that: The bottom profile plate (1), the L-shaped groove (2) and the bottom V-shaped plate (3) are arranged as a group, and two groups are provided in total. The two groups are symmetrically arranged. The two groups of bottom profile plates (1), the L-shaped groove (2) and the bottom V-shaped plate (3) are wedge-shapedly connected by a wedge-shaped plate (4), and the wedge-shaped plate (4) is provided with ventilation grooves.

4. The automotive aluminum alloy profile with high heat dissipation efficiency according to claim 1, characterized in that: Seven fans (5) are provided at the upper end of the wedge-shaped plate (4), and the fans (5) are arranged in sequence in the longitudinal direction.

5. The automotive aluminum alloy profile with high heat dissipation efficiency according to claim 1, characterized in that: The upper end of the fan (5) is provided with a lower end connecting plate (6), and the upper end of the lower end connecting plate (6) is provided with an upper end connecting plate (9). Both the lower end connecting plate (6) and the upper end connecting plate (9) are provided with ventilation holes, and the lower end connecting plate (6) and the upper end connecting plate (9) are connected in a wedge-shaped slot via a groove (7) and a protrusion (8).

6. The automotive aluminum alloy profile with high heat dissipation efficiency according to claim 1, characterized in that: The top V-shaped plate (12) is arranged inside the vertical groove (11), and the vertical groove (11) and the top V-shaped plate (12) are arranged as a group, with two groups in total, and the two groups are respectively arranged on both sides of the top profile plate (10).

7. The automotive aluminum alloy profile with high heat dissipation efficiency according to claim 1, characterized in that: The heat dissipation fins (13) are arranged at the upper end of the top profile plate (10) and are connected to the top profile plate (10) in a wedge-shaped slot. Seven heat dissipation fins (13) are provided.

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