A vehicle-mounted transformer with high-efficiency heat dissipation structure

Abstract

The application discloses a vehicle-mounted transformer with a high-efficiency heat dissipation structure applied to the field of transformers, adopts a double-cylinder structure combining an inner cylinder and an outer cylinder, heat transfer is carried out between the two through circulating flow of insulating oil, the transformer body heat can be efficiently led out from the inner cylinder to the outer cylinder, the design greatly increases a heat dissipation area, compared with a traditional fin heat dissipation mode, heat can be removed more quickly, heat gathering near the shell is reduced, and the heat dissipation efficiency is remarkably improved; in order to further enhance heat dissipation, an impeller is arranged between the inner cylinder and the outer cylinder, external airflow is guided through an air pipe penetrating through the outer cylinder, and air flow around the double cylinder is accelerated, dust introduction is avoided while auxiliary heat dissipation is realized; in addition, a spiral conveying roller and the impeller driven by the same motor are adopted, liquid cooling circulation and air cooling heat exchange are realized in cooperation, the overall heat dissipation efficiency is improved, and energy consumption is reduced.

Description

Technical Field

[0001] This invention relates to the field of transformers, and in particular to a vehicle-mounted transformer with a high-efficiency heat dissipation structure. Background Technology

[0002] Vehicle-mounted transformers are key components in mobile electrical systems such as electric vehicles and rail transit, used to achieve voltage transformation, electrical isolation, and energy transmission. Due to the limited space, frequent vibration, and poor heat dissipation conditions in the vehicle operating environment, traditional air-cooled or naturally cooled transformers are prone to problems such as excessive temperature rise and accelerated insulation aging, which affect the reliability and lifespan of the system. Especially under high power density requirements, heat accumulation is more significant, while existing heat dissipation structures often have defects such as low heat dissipation efficiency, easy dust accumulation, and difficult maintenance.

[0003] The existing patent with publication number CN111415799B discloses a high-efficiency heat dissipation transformer for new energy vehicles. By setting first and second heat dissipation limiting members on the front and rear sides and left and right sides of the inner wall of the outer shell, and installing corresponding first and second heat dissipation components in the limiting cavity formed by the limiting card seat, and at the same time arranging a cooling fan below the second heat dissipation component, the heat generated by the transformer body can be efficiently conducted and quickly dissipated, thereby significantly improving the overall heat dissipation efficiency and ensuring the stable operation of the new energy vehicle transformer under high load conditions.

[0004] A patent application with publication number CN117275891A discloses a heat dissipation device for a transformer in a new energy vehicle. By setting a temperature control power component consisting of heat-conducting plates, a first airbag, electrode plates, and a motor inside the housing, the airbag expands when the transformer heats up, triggering the motor to start. The motor drives an eccentric wheel to squeeze the second airbag, sending hot air through the heat exchange tube into the heat exchange plate A. At the same time, the cold air in the heat exchange plate A is sent back to the housing. Through the circulation and replacement of hot and cold air, the internal temperature of the housing is automatically cooled.

[0005] The aforementioned prior art discloses a technical solution for achieving rapid heat transfer using first and second heat dissipation components and a cooling fan. It also discloses a technical solution for achieving hot and cold air circulation and replacement using a heat-conducting sheet, a first airbag, an electrode sheet, and a motor. However, the prior art still has shortcomings. Although the air-cooled heat dissipation method has a simple structure, the air has a low thermal conductivity, resulting in low heat transfer efficiency and easy accumulation of local heat. In addition, the cooling fan can easily introduce dust into the transformer housing, making it difficult to maintain. Summary of the Invention

[0006] The core of this invention lies in solving the problems of low air-cooling efficiency, local heat accumulation, and difficulty in maintenance in the prior art through the inner cylinder, outer cylinder, and impeller. At the same time, the impeller with adjustable blade angle enables automatic back-blowing cleaning of the dust screen, thereby improving heat dissipation efficiency and maintainability.

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A vehicle-mounted transformer with a high-efficiency heat dissipation structure includes an inner cylinder, a cylinder cover threadedly connected to the upper end of the inner cylinder, a mounting bracket extending into the inner cylinder fixedly connected to the lower end of the cylinder cover, a circuit board fixedly connected to the mounting bracket, and a transformer body fixedly connected to the circuit board.

[0009] The upper part of the inner cylinder is fixedly connected to multiple radial tubes that are evenly distributed in a circle. The outer cylinder is fixedly connected to the outer end of the radial tubes. A clamping cavity is opened in the inner wall of the outer cylinder. The outer end of the radial tubes is connected to the clamping cavity. An axial tube is fixedly connected to the lower end of the inner cylinder. The lower end of the axial tube is fixedly connected to the bottom wall of the outer cylinder and is connected to the clamping cavity. A spiral conveying roller is installed inside the axial tube. The lower end of the spiral conveying roller extends to the bottom of the outer cylinder and is connected to the output shaft of the motor. The housing of the motor is fixedly connected to the lower end of the outer cylinder. The inner cavity of the inner cylinder and the clamping cavity are filled with insulating oil.

[0010] The upper end of the axial tube is rotatably connected to a rotating drum. An impeller is fixedly connected to the outer wall of the rotating drum. A radial rod is fixedly connected to the inner wall of the rotating drum. The middle part of the radial rod is fixedly connected to the upper end of the spiral conveying roller. An air pipe is fixedly connected to the inner wall of the clamping cavity. The inner end of the air pipe is connected to the lower part of the inner cavity of the outer cylinder. The outer end of the air pipe extends to the outside of the outer cylinder and is connected to the outside atmosphere.

[0011] Furthermore, both the inner and outer cylinders are cylindrical structures with openings at the top, and an annular cavity is formed between the inner and outer cylinders, with the impeller installed inside the annular cavity.

[0012] Furthermore, the inner opening of the trachea is located below the impeller, and the outer opening of the trachea is located above the radial tube, with the direction of the outer opening of the trachea opposite to the direction of the outer cylinder opening.

[0013] Furthermore, a temperature sensor is fixedly connected to the circuit board, and both the motor and the temperature sensor are electrically connected to the same controller.

[0014] Furthermore, the axial tube and the rotating cylinder are coaxially arranged and interconnected cylindrical structures. The axial tube includes an upper tube section and a lower tube section. The upper end of the upper tube section is fixedly connected to the lower end of the inner cylinder, and the lower end of the upper tube section is rotatably connected to the upper end of the rotating cylinder. The upper end of the lower tube section is rotatably connected to the lower end of the rotating cylinder, and the lower end of the lower tube section is fixedly connected to the bottom wall of the outer cylinder and communicates with the clamping cavity.

[0015] Furthermore, a guide cover is fixedly sleeved on the outer wall of the motor, and a base is fixedly connected to the lower end of the guide cover. The guide cover is fixedly connected to the lower end of the outer cylinder. An annular cavity communicating with the clamping cavity is opened inside the guide cover. A guide cylinder is provided inside the annular cavity, and the upper end of the guide cylinder is fixedly connected to the inner wall of the clamping cavity.

[0016] Furthermore, a fixed ring is fixedly connected to the lower end of the cylinder cover, and a floating disc is slidably connected to the fixed ring. The floating disc is slidably connected to the inner wall of the inner cylinder, and a spring sleeved on the fixed ring is abutted against the upper end of the floating disc.

[0017] Furthermore, a dustproof net is fixedly connected between the inner cylinder and the outer cylinder, and an air guide hood is fixedly connected to the outer wall of the outer cylinder. The outer end of the air pipe extends into the air guide hood, and a dustproof net is fixedly connected to the lower end of the air guide hood.

[0018] Furthermore, the impeller includes a mounting cylinder fixedly connected to the outer wall of the rotating cylinder. The outer side of the mounting cylinder is provided with blades evenly distributed in a circle. The inner end of the blades is fixedly connected to a rotating shaft. The rotating shaft extends into the mounting cylinder and is rotatably connected to the mounting cylinder. The inner end of the rotating shaft is fixedly connected to an eccentric rod. The end of the eccentric rod away from the rotating shaft is fixedly connected to a sliding column. The sliding column is slidably connected to a traction cylinder. The traction cylinder has an annular groove for the sliding column to slide. The lower end of the traction cylinder passes through the mounting cylinder and is slidably connected to the mounting cylinder. The lower end of the traction cylinder is hinged to a connecting rod. The lower end of the connecting rod is hinged to a lead screw module, which is used to pull the connecting rod.

[0019] Furthermore, the mounting cylinder is an annular cylinder with a rectangular cross-section, and the traction cylinder is an annular cylinder with an I-shaped cross-section. A pair of symmetrically arranged guide rails are fixedly connected to the lower outer wall of the axial tube. The inner wall of the traction cylinder is provided with a sliding groove for the guide rails to cooperate with, and the outer wall of the guide rails is slidably connected to the inner wall of the sliding groove.

[0020] Compared with the prior art, the advantages of this invention are:

[0021] (1) This invention adopts a double-cylinder design combining an inner cylinder and an outer cylinder, and uses insulating oil circulating between the two for heat transfer, thereby efficiently dissipating the heat generated by the transformer body from the inner cylinder to the outer cylinder. This design significantly increases the heat dissipation area, and compared with traditional transformers that rely on finned shells for heat dissipation, this structure can remove heat from the transformer body more quickly, reduce the accumulation of heat near the shell, and achieve higher heat dissipation efficiency. To further improve heat dissipation efficiency, this invention also sets an impeller between the inner cylinder and the outer cylinder, and guides airflow through an air pipe penetrating the outer cylinder. After the external airflow enters the inner cavity of the outer cylinder, it is discharged through the air pipe, which can accelerate the airflow around the double cylinder, thereby achieving auxiliary heat dissipation while preventing dust introduction. In addition, the spiral conveying roller and impeller driven by the same motor work together to achieve the coordinated operation of liquid cooling circulation and air cooling heat exchange, improving the overall heat dissipation efficiency while reducing power consumption.

[0022] (2) By providing dustproof net one and dustproof net two, the present invention reduces the pollution and erosion of dust on the inner cylinder and outer cylinder wall, improves the heat exchange efficiency of the inner cylinder and outer cylinder, and, in conjunction with the adjustable impeller, periodically back-flushes the dustproof net one and dustproof net two, reducing the frequency of manual maintenance. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0025] Figure 3 This is a schematic diagram of the assembly structure of the inner cylinder and the outer cylinder in this invention;

[0026] Figure 4 This is a schematic diagram of the assembly structure of the guide cover and the outer cylinder in this invention;

[0027] Figure 5 This is an exploded assembly diagram of the circuit board and the cylinder cover in this invention;

[0028] Figure 6 This is a schematic diagram of the flow of insulating oil and airflow in this invention;

[0029] Figure 7 This is a three-dimensional structural diagram of the impeller and axial tube in this invention;

[0030] Figure 8 This is a cross-sectional exploded view of the impeller and axial tube in this invention;

[0031] Figure 9 This is a cross-sectional view of the traction cylinder in this invention.

[0032] Figure 10 This is a schematic diagram of the impeller rotation in this invention;

[0033] Figure 11 This is a schematic diagram of the blade angle adjustment in this invention;

[0034] Figure 12 This is a schematic diagram of the airflow after the blade angle is adjusted in this invention.

[0035] Explanation of the labels in the diagram:

[0036] 1. Inner cylinder; 2. Cylinder cover; 3. Mounting bracket; 4. Circuit board; 5. Transformer body; 6. Radial tube; 7. Outer cylinder; 701. Clamping cavity; 8. Axial tube; 801. Upper tube section; 802. Lower tube section; 9. Screw conveyor roller; 10. Motor; 11. Rotary drum; 12. Radial rod; 13. Impeller; 14. Air pipe; 15. Guide cover; 16. Guide cylinder; 17. Base; 18. Temperature sensor; 19. Dustproof net one; 20. Air guide cover; 21. Dustproof net two; 22. Mounting cylinder; 23. Blade; 24. Rotating shaft; 25. Eccentric rod; 26. Sliding column; 27. Traction cylinder; 2701. Annular groove; 2702. Sliding groove; 28. Guide rail; 29. ​​Connecting rod; 30. Screw module; 31. Floating disc; 32. Fixing ring; 33. Spring. Detailed Implementation

[0037] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0038] First implementation method

[0039] Please see Figures 1-3 In one embodiment of the present invention, a vehicle-mounted transformer with a high-efficiency heat dissipation structure includes an inner cylinder 1, a cylinder cover 2 threadedly connected to the upper end of the inner cylinder 1, a mounting bracket 3 extending into the inner cylinder 1 fixedly connected to the lower end of the cylinder cover 2, a circuit board 4 fixedly connected to the mounting bracket 3, and a transformer body 5 fixedly connected to the circuit board 4.

[0040] Please see Figure 2 , Figure 3 , Figure 4 and Figure 6 The inner cylinder 1 has multiple radially arranged tubes 6 fixedly connected to its upper part. An outer cylinder 7 is fixedly connected to the outer end of each radially arranged tube 6. A clamping cavity 701 is formed inside the wall of the outer cylinder 7. The outer ends of the radially arranged tubes 6 communicate with the clamping cavity 701. An axial tube 8 is fixedly connected to the lower end of the inner cylinder 1. The lower end of the axial tube 8 is fixedly connected to the bottom wall of the outer cylinder 7 and communicates with the clamping cavity 701. A spiral conveying roller 9 is installed inside the axial tube 8. The lower end of the spiral conveying roller 9 extends below the outer cylinder 7 and is fixedly connected to... The output shaft of motor 10 and the housing of motor 10 are fixedly connected to the lower end of outer cylinder 7. The inner cavity of inner cylinder 1 and the clamping cavity 701 are both filled with insulating oil. When motor 10 drives the spiral conveying roller 9 to rotate, it pushes the insulating oil in axial tube 8 into inner cylinder 1. The insulating oil in inner cylinder 1 enters the upper part of clamping cavity 701 through radial tube 6 at its upper part. The insulating oil in the lower part of clamping cavity 701 enters axial tube 8, realizing the circulation of insulating oil between inner cylinder 1 and clamping cavity 701.

[0041] Please see Figure 2 and Figure 6 The upper end of the axial tube 8 is rotatably connected to a rotating drum 11. An impeller 13 is fixedly connected to the outer wall of the rotating drum 11. A radial rod 12 is fixedly connected to the inner wall of the rotating drum 11. The middle part of the radial rod 12 is fixedly connected to the upper end of the spiral conveying roller 9. An air pipe 14 is fixedly connected to the inner wall of the clamping cavity 701. The inner end of the air pipe 14 is connected to the lower part of the inner cavity of the outer cylinder 7. The outer end of the air pipe 14 extends to the outside of the outer cylinder 7 and is connected to the outside atmosphere. Specifically, when the spiral conveying roller 9 rotates, it drives the rotating drum 11 to rotate through the radial rod 12. The rotating drum 11 drives the impeller 13 on its outer wall to rotate. The impeller 13 compresses the airflow in the outer cylinder 7, so that the airflow is discharged to the outside of the outer cylinder 7 through the air pipe 14, making the inner cavity of the outer cylinder 7 negative pressure, thereby allowing the external airflow to enter the inner cavity of the outer cylinder 7.

[0042] Specifically, when the transformer body 5 is working, the motor 10 is started, and the motor 10 drives the spiral conveying roller 9 to rotate. The spiral conveying roller 9 pushes the insulating oil to flow, so that the insulating oil circulates between the inner cavity of the inner cylinder 1 and the clamping cavity 701. At the same time, the impeller 13 causes the external airflow to first enter the inner cavity of the outer cylinder 7 and then be discharged from the air pipe 14. In this process, the insulating oil absorbs the heat of the transformer body 5, and then, with the flow of the insulating oil, carries the heat to the clamping cavity 701 of the outer cylinder 7. The larger surface area of ​​the outer cylinder 7 is used to exchange heat with the external air. At the same time, the airflow flowing through the air pipe 14 exchanges heat with the heat-conducting oil in the clamping cavity 701.

[0043] Compared to traditional transformer heat dissipation structures, this invention employs a double-cylinder design combining an inner cylinder 1 and an outer cylinder 7, with heat transfer achieved through insulating oil circulating between the two. This efficiently transfers the heat generated by the transformer body 5 from the inner cylinder 1 to the outer cylinder 7. This design significantly increases the heat dissipation area and, compared to traditional transformers relying on finned casings for heat dissipation, removes heat from the transformer body 5 more quickly, reducing heat accumulation near the casing and resulting in higher heat dissipation efficiency. To further enhance heat dissipation efficiency, an impeller 13 is installed between the inner cylinder 1 and the outer cylinder 7, and airflow is guided through an air pipe 14 penetrating the outer cylinder 7. External airflow enters the inner cavity of the outer cylinder 7 and exits through the air pipe 14, accelerating airflow around the double cylinders. This provides auxiliary heat dissipation while preventing dust from being introduced into the environment surrounding the transformer body 5. Furthermore, the spiral conveyor roller 9 driven by the same motor 10, in conjunction with the impeller 13, achieves coordinated operation of liquid cooling circulation and air cooling heat exchange, improving overall heat dissipation efficiency while reducing power consumption.

[0044] Please see Figure 2 and Figure 4 Both the inner cylinder 1 and the outer cylinder 7 are cylindrical structures with open tops, and an annular cavity is formed between the inner cylinder 1 and the outer cylinder 7. The impeller 13 is installed in the annular cavity.

[0045] Specifically, when the impeller 13 rotates, the airflow enters from the upper part of the annular cavity and flows through the outer wall of the inner cylinder 1 and the inner wall of the outer cylinder 7, achieving full contact between the external air and the inner cylinder 1 and the outer cylinder 7. In addition, the surface of the traditional transformer shell is provided with uniformly distributed heat dissipation fins, and grooves are formed between adjacent fins. When dust accumulates on the surface of the shell, cleaning is cumbersome. However, the present invention adopts a double-cylinder design of inner cylinder 1 and outer cylinder 7, which not only ensures the heat dissipation area, but also makes it easy to wipe and clean the inner cylinder 1 and outer cylinder 7 when dust accumulates on their surfaces, thus improving maintainability.

[0046] Please see Figure 2 and Figure 4The inner opening of the air pipe 14 is located below the impeller 13, and the outer opening of the air pipe 14 is located above the radial pipe 6. The direction of the outer opening of the air pipe 14 is opposite to the direction of the opening of the outer cylinder 7.

[0047] Specifically, the air pipe 14 is arranged along the axial direction of the clamping cavity 701 to increase the heat exchange area. At the same time, the airflow ejected from the opening of the air pipe 14 blows the airflow near the outer wall of the outer cylinder 7, enhancing the flow of airflow near the outer cylinder 7 and reducing the settling and adhesion of dust on the outer wall of the outer cylinder 7.

[0048] Please see Figure 2 and Figure 3 A temperature sensor 18 is also fixedly connected to the circuit board 4. The motor 10 and the temperature sensor 18 are both electrically connected to the same controller.

[0049] Specifically, the temperature of the insulating oil near the transformer body 5 is detected by the temperature sensor 18. When the real-time temperature exceeds the temperature threshold, the controller increases the speed of the motor 10, thereby increasing the circulation speed of the insulating oil and the flow speed of the airflow, so as to achieve heat dissipation on demand and reduce energy consumption.

[0050] Please see Figure 2 and Figure 8 The axial tube 8 and the rotating cylinder 11 are coaxially arranged and interconnected cylindrical structures. The axial tube 8 includes an upper tube section 801 and a lower tube section 802. The upper end of the upper tube section 801 is fixedly connected to the lower end of the inner cylinder 1, and the lower end of the upper tube section 801 is rotatably connected to the upper end of the rotating cylinder 11. The upper end of the lower tube section 802 is rotatably connected to the lower end of the rotating cylinder 11, and the lower end of the lower tube section 802 is fixedly connected to the bottom wall of the outer cylinder 7 and communicates with the clamping cavity 701.

[0051] Specifically, the motor 10 drives the radial rod 12 to rotate via the spiral conveying roller 9, the radial rod 12 drives the rotating drum 11 to rotate, and the rotating drum 11 drives the impeller 13 to rotate. The rotation of the spiral conveying roller 9 and the impeller 13 is achieved by the motor 10, thereby realizing the synchronous circulation of insulating oil and airflow.

[0052] Please see Figure 2 and Figure 4 A guide cover 15 is fixedly sleeved on the outer wall of the motor 10. A base 17 is fixedly connected to the lower end of the guide cover 15. The guide cover 15 is fixedly connected to the lower end of the outer cylinder 7. An annular cavity communicating with the clamping cavity 701 is opened inside the guide cover 15. A guide cylinder 16 is provided in the annular cavity. The upper end of the guide cylinder 16 is fixedly connected to the inner wall of the clamping cavity 701.

[0053] Specifically, the guide cylinder 16 divides the annular cavity into annular cavities with a U-shaped cross-section. When the insulating oil flows in the annular cavity, it carries away the heat generated by the motor 10, further improving the heat dissipation effect.

[0054] Please see Figure 2 and Figure 5 A fixed ring 32 is fixedly connected to the lower end of the cylinder cover 2. A floating disk 31 is slidably connected to the fixed ring 32. The floating disk 31 is slidably connected to the inner wall of the inner cylinder 1. A spring 33 sleeved on the fixed ring 32 is abutted against the upper end of the floating disk 31.

[0055] Specifically, when installing the cylinder cover 2, the floating disk 31 that can float up and down is used to squeeze the insulating oil filled in the inner cylinder 1, so that the insulating oil fully fills the inner cavity and the clamping cavity 701 of the inner cylinder 1, ensuring the circulation effect of the insulating oil, facilitating the disassembly and assembly of the circuit board 4 and the filling of the insulating oil. It should be noted that the circuit board 4 is an aluminum substrate or a copper substrate, which is used to install the transformer body 5 and has good thermal conductivity.

[0056] Second implementation method

[0057] Based on the first implementation, please refer to Figure 2 and Figure 4 A dustproof net 19 is fixedly connected between the inner cylinder 1 and the outer cylinder 7. An air guide hood 20 is fixedly connected to the outer wall of the outer cylinder 7. The outer end of the air pipe 14 extends into the air guide hood 20. A dustproof net 21 is fixedly connected to the lower end of the air guide hood 20.

[0058] Specifically, dust entering the annular cavity is reduced by dustproof net 19, and dust entering the air pipe 14 is reduced by dustproof net 21. This reduces the pollution and erosion of the outer wall of the inner cylinder 1, the inner wall of the outer cylinder 7, and the impeller 13 by dust, thereby improving heat exchange efficiency and extending the service life of the equipment.

[0059] Please see Figure 2 , Figure 7 , Figure 8 and Figure 9 The impeller 13 includes a mounting cylinder 22 fixedly connected to the outer wall of the rotating cylinder 11. The outer side of the mounting cylinder 22 is provided with blades 23 evenly distributed in a circular pattern. The inner end of the blades 23 is fixedly connected to a rotating shaft 24. The rotating shaft 24 extends into the mounting cylinder 22 and is rotatably connected to the mounting cylinder 22. The inner end of the rotating shaft 24 is fixedly connected to an eccentric rod 25. The end of the eccentric rod 25 away from the rotating shaft 24 is fixedly connected to a sliding column 26. The sliding column 26 is slidably connected to a traction cylinder 27. The traction cylinder 27 has an annular groove 2701 for the sliding column 26 to slide. The lower end of the traction cylinder 27 passes through the mounting cylinder 22 and is slidably connected to the mounting cylinder 22. The lower end of the traction cylinder 27 is hinged to a connecting rod 29. The lower end of the connecting rod 29 is hinged to a lead screw module 30. The lead screw module 30 is used to pull the connecting rod 29.

[0060] For details, please refer to Figure 11 and Figure 12When the connecting rod 29 is pulled by the lead screw module 30, the connecting rod 29 drives the traction cylinder 27 to move up and down. Since the rotating shaft 24 is limited on the mounting cylinder 22, in order to facilitate the up and down movement of the traction cylinder 27, the sliding column 26 will slide along the annular groove 2701. At the same time, its height position also changes with the traction cylinder 27, thereby driving the rotating shaft 24 to rotate in place on the mounting cylinder 22, changing the tilt angle of the blade 23, and thus changing the flow direction of the airflow.

[0061] More specifically, in the initial state, the upper end of the traction cylinder 27 is close to the inner wall of the mounting cylinder 22 (e.g., Figure 10 As shown), in this state, under the rotation of the impeller 13, external gas enters the interior of the outer cylinder 7 through the dustproof net 19 at the top of the outer cylinder 7, and the hot gas inside the outer cylinder 7 is discharged through the air pipe 14. When the traction cylinder 27 moves downward to near the lower inner wall of the mounting cylinder 22, combined with... Figure 11 and Figure 12 As shown, at this time, the blade 23 rotates 180 degrees. In this state, external air enters from the opening at the outer end of the air pipe 14, then the airflow enters the annular cavity, and finally exits from the upper end of the annular cavity. By changing the airflow direction, the dustproof net 19 and the dustproof net 21 are back-blown, improving their air permeability and reducing the frequency of manual maintenance. It should be noted that the controller is equipped with a timing module, which periodically starts the screw module 30, thereby realizing the periodic automatic back-blowing cleaning of the dustproof net 19 and the dustproof net 21.

[0062] Please see Figure 8 and Figure 9 The mounting cylinder 22 is an annular cylinder with a rectangular cross-section, and the traction cylinder 27 is an annular cylinder with an I-shaped cross-section. A pair of symmetrically arranged guide rails 28 are fixedly connected to the lower outer wall of the axial tube 8. The inner wall of the traction cylinder 27 is provided with a sliding groove 2702 that matches the guide rails 28. The outer wall of the guide rails 28 is slidably connected to the inner wall of the sliding groove 2702.

[0063] Specifically, the guide rail 28 and the sliding groove 2702 are used to circumferentially position the traction cylinder 27 to prevent circumferential rotation of the traction cylinder 27 and to make it move up and down stably. In addition, it should be noted that the lead screw module 30 includes a moving block that is hinged to the lower end of the connecting rod 29. The moving block is slidably connected to the slide frame. The slide frame is provided with a lead screw that is threadedly connected to the moving block. One end of the lead screw is fixedly connected to the output shaft of the lead screw motor. The lead screw motor is fixedly connected to the slide frame.

[0064] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A vehicle-mounted transformer with a high-efficiency heat dissipation structure, characterized in that, Includes an inner cylinder (1), the upper end of which is threadedly connected to a cylinder cover (2), the lower end of which is fixedly connected to a mounting bracket (3) extending into the inner cylinder (1), a circuit board (4) fixedly connected to the mounting bracket (3), and a transformer body (5) fixedly connected to the circuit board (4). The upper part of the inner cylinder (1) is fixedly connected to a plurality of radial tubes (6) evenly distributed in a circle. The outer end of the radial tubes (6) is fixedly connected to an outer cylinder (7). A clamping cavity (701) is opened in the inner wall of the outer cylinder (7). The outer end of the radial tubes (6) is connected to the clamping cavity (701). The lower end of the inner cylinder (1) is fixedly connected to an axial tube (8). The lower end of the axial tube (8) is fixedly connected to the bottom wall of the outer cylinder (7), and the lower end of the axial tube (8) is connected to the clamping cavity (701). A spiral conveying roller (9) is provided in the axial tube (8). The lower end of the spiral conveying roller (9) extends to the bottom of the outer cylinder (7) and is fixedly connected to the output shaft of a motor (10). The housing of the motor (10) is fixedly connected to the lower end of the outer cylinder (7). The inner cavity of the inner cylinder (1) and the clamping cavity (701) are both filled with insulating oil. The upper end of the axial tube (8) is rotatably connected to a rotating drum (11). An impeller (13) is fixedly connected to the outer wall of the rotating drum (11). A radial rod (12) is fixedly connected to the inner wall of the rotating drum (11). The middle part of the radial rod (12) is fixedly connected to the upper end of the spiral conveying roller (9). An air pipe (14) is fixedly connected to the inner wall of the clamping cavity (701). The inner end of the air pipe (14) is connected to the lower part of the inner cavity of the outer cylinder (7). The outer end of the air pipe (14) extends to the outside of the outer cylinder (7) and is connected to the external atmosphere. The impeller (13) includes a mounting cylinder (22) fixedly connected to the outer wall of the rotating drum (11). The outer side of the mounting cylinder (22) is provided with blades (23) evenly distributed in a circle. The inner end of the blades (23) is fixedly connected to a rotating impeller. A shaft (24) extends into the mounting cylinder (22) and is rotatably connected to the mounting cylinder (22). An eccentric rod (25) is fixedly connected to the inner end of the shaft (24). A sliding column (26) is fixedly connected to the end of the eccentric rod (25) away from the shaft (24). A traction cylinder (27) is slidably connected to the sliding column (26). An annular groove (2701) for sliding column (26) is provided on the traction cylinder (27). The lower end of the traction cylinder (27) passes through the mounting cylinder (22) and is slidably connected to the mounting cylinder (22). A connecting rod (29) is hinged to the lower end of the traction cylinder (27). A screw module (30) is hinged to the lower end of the connecting rod (29). The screw module (30) is used to pull the connecting rod (29).

2. The vehicle-mounted transformer with a high-efficiency heat dissipation structure according to claim 1, characterized in that, Both the inner cylinder (1) and the outer cylinder (7) are cylindrical structures with open tops. An annular cavity is formed between the inner cylinder (1) and the outer cylinder (7), and the impeller (13) is installed in the annular cavity.

3. The vehicle-mounted transformer with a high-efficiency heat dissipation structure according to claim 1, characterized in that, The inner end opening of the air pipe (14) is located below the impeller (13), and the outer end opening of the air pipe (14) is located above the radial pipe (6), and the direction of the outer end opening of the air pipe (14) is opposite to the direction of the opening of the outer cylinder (7).

4. The vehicle-mounted transformer with a high-efficiency heat dissipation structure according to claim 1, characterized in that, A temperature sensor (18) is also fixedly connected to the circuit board (4), and the motor (10) and the temperature sensor (18) are electrically connected to the same controller.

5. The vehicle-mounted transformer with a high-efficiency heat dissipation structure according to claim 1, characterized in that, The axial tube (8) and the rotating cylinder (11) are coaxially arranged and interconnected cylindrical structures. The axial tube (8) includes an upper tube (801) and a lower tube (802). The upper end of the upper tube (801) is fixedly connected to the lower end of the inner cylinder (1), the lower end of the upper tube (801) is rotatably connected to the upper end of the rotating cylinder (11), the upper end of the lower tube (802) is rotatably connected to the lower end of the rotating cylinder (11), and the lower end of the lower tube (802) is fixedly connected to the bottom wall of the outer cylinder (7) and communicates with the clamping cavity (701).

6. The vehicle-mounted transformer with a high-efficiency heat dissipation structure according to claim 1, characterized in that, The outer wall of the motor (10) is fixedly fitted with a guide cover (15), and the lower end of the guide cover (15) is fixedly connected to a base (17). The guide cover (15) is fixedly connected to the lower end of the outer cylinder (7). An annular cavity communicating with the clamping cavity (701) is opened inside the guide cover (15). A guide cylinder (16) is provided inside the annular cavity. The upper end of the guide cylinder (16) is fixedly connected to the inner wall of the clamping cavity (701).

7. The vehicle-mounted transformer with a high-efficiency heat dissipation structure according to claim 1, characterized in that, The lower end of the cylinder cover (2) is fixedly connected to a fixing ring (32), and a floating disk (31) is slidably connected to the fixing ring (32). The floating disk (31) is slidably connected to the inner wall of the inner cylinder (1), and a spring (33) sleeved on the fixing ring (32) is abutted at the upper end of the floating disk (31).

8. The vehicle-mounted transformer with a high-efficiency heat dissipation structure according to claim 1, characterized in that, A dustproof net (19) is fixedly connected between the inner cylinder (1) and the outer cylinder (7). An air guide hood (20) is fixedly connected to the outer wall of the outer cylinder (7). The outer end of the air pipe (14) extends into the air guide hood (20). A dustproof net (21) is fixedly connected to the lower end of the air guide hood (20).

9. A vehicle-mounted transformer with a high-efficiency heat dissipation structure according to claim 1, characterized in that, The mounting cylinder (22) is an annular cylinder with a rectangular cross-section, and the traction cylinder (27) is an annular cylinder with an I-shaped cross-section. A pair of symmetrically arranged guide rails (28) are fixedly connected to the lower outer wall of the axial tube (8). The inner wall of the traction cylinder (27) is provided with a sliding groove (2702) that matches the guide rails (28). The outer wall of the guide rails (28) is slidably connected to the inner wall of the sliding groove (2702).

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