A low-voltage control box and an electric vehicle

Abstract

This invention discloses a low-voltage control box and an electric vehicle, including a box body. Two vertically arranged first partitions are installed inside the box body, and a support plate is installed between the two first partitions. The support plate is used to install electronic components. Several air outlet pipes are arranged above the support plate, and several air outlet holes are opened along the axial direction of the air outlet pipes. A first motor is installed in a second chamber between the left side wall of the box body and the first partitions. A residual bevel gear is fixedly connected to the output end of the first motor. The residual bevel gear intermittently meshes with a first bevel gear and a second bevel gear. This invention uses the residual bevel gear to sequentially mesh with the first and second bevel gears, thereby driving the air outlet pipes to rotate around their central axis first in one direction and then in the opposite direction, causing the air outlet pipes to vent at different angles, thus adjusting the blowing angle and allowing cold air to be blown to various positions on the support plate, greatly improving the heat dissipation effect of the support plate.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle technology, specifically to a low-voltage control box and an electric vehicle. Background Technology

[0002] In new energy vehicles, the low-voltage control box is a crucial automotive component. Typically used low-voltage control boxes require numerous high-power wires and electronic components. These components generate significant heat during operation, and their operation is highly sensitive to ambient temperature. High internal temperatures within the control box can cause various problems, such as insufficient component precision and equipment malfunction. Therefore, existing low-voltage control boxes require active cooling mechanisms to dissipate heat from the electronic components. However, current cooling mechanisms lack adjustment devices, their airflow angle is not adjustable, their functionality is limited, and their cooling effect is inadequate. Summary of the Invention

[0003] This invention provides a low-voltage control box and an electric vehicle, aiming to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, according to a first aspect of the present invention, the present invention is implemented through the following technical solution: a low-voltage control box, comprising a box body, wherein two vertically arranged first partitions are installed inside the box body, and a support plate is installed between the two first partitions. The support plate is used to install electronic components. A plurality of vent pipes are arranged above the support plate, and a plurality of vent holes are opened along the axial direction of the vent pipes. A first motor is installed in a second cavity between the left side wall of the box body and the first partitions. A bevel gear is fixedly connected to the output end of the first motor, and the bevel gear is intermittently meshed. The device has a first bevel gear and a second bevel gear. One end of the air outlet pipe is rotatably connected to the first partition and extends into the first chamber where the first gear is installed. The first gears on adjacent air outlet pipes are meshed and connected through the second gear. The first bevel gear and the second bevel gear drive the first gear to rotate sequentially through the first transmission mechanism. A second motor and a fan are installed in the third chamber between the right side wall of the box and the first partition. The output end of the second motor drives the fan to rotate through the second transmission mechanism. The other end of the air outlet pipe is rotatably connected to the first partition and extends to the fan. A first through groove is provided on the bottom wall of the box.

[0005] As can be seen from the above technical solution, the first motor drives the residual bevel gear to rotate, and the residual bevel gear meshes with the first bevel gear and the second bevel gear in sequence, thereby driving the air outlet pipe to rotate in one direction and then in the opposite direction around its central axis, so that the air outlet pipe is directed to different angles, realizing the adjustment of the blowing angle, thereby blowing cold air to various positions on the support plate, greatly improving the heat dissipation effect of the support plate.

[0006] A further embodiment is that a semiconductor cooler is installed on both the front and rear surfaces of the housing, the cold end of the semiconductor cooler is connected by several cooling plates, and the cooling plates are disposed between the air inlet end of the air outlet pipe and the fan.

[0007] As can be seen from the above technical solution, by installing a semiconductor cooler on the box to cool the air entering the exhaust pipe, it is beneficial to increase the temperature difference between the main components on the carrier plate and the air, and further improve the heat dissipation effect of the carrier plate.

[0008] A further embodiment includes a second partition plate installed between the second motor and the right side wall of the housing. A filter screen plate is mounted on the second partition plate, and a brush plate is mounted on the outer side of the filter screen plate. The brush plate has threaded holes and through holes. A second lead screw is threadedly connected to the brush plate through the threaded holes. The upper end of the second lead screw is rotatably connected to the housing, and an eleventh bevel gear is fixedly connected to the bottom end of the second lead screw. A slide rod is slidably connected to the brush plate through the through holes. The first and second bevel gears drive the eleventh bevel gear to rotate through a third transmission mechanism.

[0009] As can be seen from the above technical solution, since the mesh of the filter plate cannot be blocked by dust when air is introduced, that is, it cannot be blocked by dust when the air outlet pipe rotates around its central axis in different directions, the eleventh bevel gear can be driven to rotate by the first and second bevel gears respectively, thereby driving the brush plate to move up and down reciprocally, cleaning the dust attached to various positions on the outside of the filter plate, avoiding dust clogging the mesh of the filter plate and affecting the air intake effect, and eliminating the need for an additional drive mechanism to drive the brush plate to move up and down reciprocally.

[0010] A further embodiment is that the third transmission mechanism includes at least a movable plate disposed within the bottom wall of the box. The bottom wall of the box is slidably connected to the movable plate by a first groove. The movable plate is provided with a plurality of second through slots spaced apart. The first through slots are spaced apart on the bottom wall of the box, and the distance between adjacent second through slots is greater than the width of the first through slot, and the distance between adjacent first through slots is greater than the width of the second through slot. The left end of the movable plate is threadedly connected to a first lead screw by a second groove. The second groove is a threaded groove. The first lead screw is rotatably connected to the first groove, and a sixth bevel gear is mounted on the outer surface of the first lead screw. The first bevel gear and the second bevel gear drive the sixth bevel gear to rotate through a fourth transmission mechanism. The upper surface of the right end of the movable plate is provided with gear teeth and meshes with a fourth gear. The fourth gear meshes with an eleventh bevel gear through a fifth transmission mechanism.

[0011] As can be seen from the above technical solution, the first and second bevel gears drive the movable plate to reciprocate within the bottom wall of the box, thereby driving the fourth gear to rotate in both directions, which in turn drives the second lead screw to rotate in both directions, realizing the up-and-down reciprocating motion of the brush plate. This cleans the dust attached to various positions on the outside of the filter screen. At the same time, the movable plate and the bottom wall of the box support each other in structure and function. During the process of the movable plate driving the brush plate to reciprocate up and down as part of the transmission mechanism, the first chamber inside the box can alternately switch between interconnection and isolation with the external environment. This allows the cold air to stay in the first chamber of the box for a period of time, and then be discharged from the first chamber of the box after sufficient heat exchange, thereby improving the utilization rate of the cold air. In addition, the movable plate is set inside the bottom wall of the box, avoiding the space occupation and aesthetic impact of the movable plate being set outside the box.

[0012] A further embodiment is that the bearing plate is mounted on the first partition through the first support plate at both ends. The first support plate is L-shaped, and three support rods are provided between the bearing plate and the air outlet pipe. The middle support rod is higher than the support rods on both sides. The support rods on both sides are located directly above the first support plate. A breathable and waterproof membrane is provided on the three support rods.

[0013] As can be seen from the above technical solution, if the water vapor inside the box condenses into water droplets, the water droplets will adhere to the inner wall of the box. The vibration generated during the movement of the car will cause the water droplets to fall onto the breathable and waterproof membrane, and slide down along the breathable and waterproof membrane to the first support plate or the bottom wall of the box, instead of dripping onto the carrier plate. This can effectively prevent the water droplets from affecting the electronic components on the carrier plate.

[0014] A further embodiment is that the second transmission mechanism includes a seventh bevel gear fixedly connected to the output end of the second motor, the seventh bevel gear meshing with an eighth bevel gear, the shaft of the eighth bevel gear being rotatably connected to the side wall of the housing and having several ninth bevel gears installed thereon, the ninth bevel gears meshing with a tenth bevel gear, and the tenth bevel gear being used to drive the fan to rotate.

[0015] As can be seen from the above technical solution, the cooperation of the seventh bevel gear, the eighth bevel gear, the ninth bevel gear and the tenth bevel gear enables the second motor to drive multiple fans to rotate simultaneously, which is beneficial to the uniform air intake of each air outlet pipe.

[0016] A further option is to provide a perforated section on the right side wall of the box that corresponds to the filter screen.

[0017] A further embodiment is that the fifth transmission mechanism further includes a fifth gear rotatably connected to the side wall of the box, and a twelfth bevel gear is mounted on the gear shaft of the fifth gear, and the twelfth bevel gear is meshed with the eleventh bevel gear.

[0018] A further option is that the cooling plate is made of copper or aluminum and has ribs.

[0019] According to a second aspect of the invention, an electric vehicle is provided, comprising a low-voltage control box as described above.

[0020] Compared with the prior art, the beneficial effects of the present invention are: (1) The present invention drives the residual bevel gear to rotate through the first motor, and the residual bevel gear meshes with the first bevel gear and the second bevel gear in sequence, thereby driving the air outlet pipe to rotate in one direction and then in the opposite direction around its central axis, so that the air outlet pipe can be directed to different angles, thereby adjusting the blowing angle, so that cold air can be blown to various positions on the support plate, greatly improving the heat dissipation effect of the support plate;

[0021] (2) Since the mesh of the filter plate cannot be blocked by dust when the air is inlet, that is, the air outlet pipe cannot be blocked by dust when rotating around its central axis in different directions, the eleventh bevel gear can be driven to rotate by the first bevel gear and the second bevel gear respectively, thereby driving the brush plate to move up and down reciprocally, cleaning the dust attached to each position on the outside of the filter plate, avoiding dust blockage of the mesh of the filter plate and affecting the air intake effect, and eliminating the need for an additional drive mechanism to drive the brush plate to move up and down reciprocally.

[0022] (3) The first bevel gear and the second bevel gear drive the movable plate to reciprocate within the bottom wall of the box, thereby driving the fourth gear to rotate in both directions, and further driving the second lead screw to rotate in both directions, so as to realize the up-and-down reciprocating motion of the brush plate, cleaning the dust attached to various positions on the outside of the filter screen. At the same time, the movable plate and the bottom wall of the box support each other in structure and function. During the process of the movable plate driving the brush plate to reciprocate up and down as part of the transmission mechanism, the first chamber inside the box can alternately switch between interconnection and isolation with the external environment, so that the cold air can stay in the first chamber inside the box for a period of time, and after sufficient heat exchange, it can be discharged from the first chamber of the box, thereby improving the utilization rate of cold air. In addition, the movable plate is set inside the bottom wall of the box, avoiding the movable plate being set outside the box, occupying space and affecting the aesthetics. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the front cross-sectional structure of the present invention;

[0025] Figure 2 This is a top view cross-sectional structural diagram of the present invention;

[0026] Figure 3 This is the present invention. Figure 1 Schematic diagram of local structure Figure 1 ;

[0027] Figure 4 This is the present invention. Figure 1 Schematic diagram of local structure Figure 2 ;

[0028] Figure 5 This is the present invention. Figure 4 A magnified view of the structure at point A in the middle;

[0029] Figure 6 This is the present invention. Figure 2 A partial structural diagram;

[0030] Reference numerals: 1. Box body; 2. First chamber; 3. Second chamber; 4. Third chamber; 5. Fourth chamber; 6. Air outlet pipe; 7. Support plate; 8. Air outlet; 9. Filter plate; 10. First partition; 11. Movable plate; 12. First through groove; 13. Second through groove; 14. Semiconductor cooler; 15. Cooling plate; 16. Second partition; 17. Hollowed-out part; 18. First groove; 19. Second groove; 20. First lead screw; 21. Brush plate; 22. Breathable and waterproof membrane; 23. Support rod; 24. First support plate; 301. First motor; 302. Residual bevel gear; 303. First bevel gear; 304. Second bevel gear; 305. Third bevel gear. 5. Fourth bevel gear 306, fourth bevel gear shaft 307, third gear 308, first gear 309, second gear 310, third bevel gear shaft 311, second support plate 312, fifth bevel gear 313, sixth bevel gear 314, second motor 401, seventh bevel gear 402, eighth bevel gear 403, ninth bevel gear 404, tenth bevel gear 405, eighth bevel gear shaft 406, fan 407, second lead screw 501, slide bar 502, eleventh bevel gear 503, twelfth bevel gear 504, fourth gear 505, fifth gear 506. Detailed Implementation

[0031] To make the objectives, features, and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] Example 1

[0035] Please see Figure 1 and Figure 2A low-voltage control box includes a box body 1. Two vertically arranged first partitions 10 and one vertically arranged second partition 16 are installed inside the box body 1. The two first partitions 10 and one second partition 16 divide the inner cavity of the box body 1 into different independent chambers. The second chamber 3 is set between the left side wall of the box body 1 and the first partition 10, the first chamber 2 is set between the two first partitions 10, the third chamber 4 is set between the first partition 10 and the second partition 16, and the fourth chamber 5 is set between the second partition 16 and the right side wall of the box body 1.

[0036] Please see Figures 1-4 and Figure 6The support plate 7 is mounted on the first partition 10 at both ends via the first support plate 24, which is L-shaped. The support plate 7 is used to mount electronic components. Several vent pipes 6 are arranged side by side above the support plate 7. Several vent holes 8 are evenly opened along the axis of the vent pipes 6. A first motor 301 is installed in the second chamber 3 between the left side wall of the box 1 and the first partition 10. The output end of the first motor 301 is fixedly connected to a bevel gear 30. 2. The residual bevel gear 302 is intermittently meshed with the first bevel gear 303 and the second bevel gear 304. That is, the residual bevel gear 302 is sequentially meshed with the first bevel gear 303 and the second bevel gear 304. The first bevel gear 303 and the second bevel gear 304 are coaxially arranged. A third bevel gear shaft 311 is inserted between the first bevel gear 303 and the second bevel gear 304. The middle part of the third bevel gear shaft 311 is rotatably connected to the second support plate 312 installed in the second chamber 3. One end of the exhaust pipe 6 is rotatably connected to the first partition 10 and extends into the first chamber 3, where a first gear 309 is installed. The first gears 309 on adjacent exhaust pipes 6 are meshed with a second gear 310, so that adjacent exhaust pipes 6 rotate in the same direction. A third bevel gear 305 is fixedly connected to the top end of the third bevel gear shaft 311. The third bevel gear 305 is meshed with a fourth bevel gear 306. A fourth bevel gear shaft 307 is inserted in the middle of the fourth bevel gear 306. The fourth bevel gear shaft 307 is rotatably connected to the side wall of the first chamber 3. A third gear 308 is fixedly connected to the end of the fourth bevel gear shaft 307. The third gear 308 is meshed with one of the first gears 309. A second motor is installed in the third chamber 4 between the second partition 16 and the first partition 10. The second motor 401 and fan 407 are connected. The output end of the second motor 401 is fixedly connected to a seventh bevel gear 402. The seventh bevel gear 402 is meshed with an eighth bevel gear 403. The shaft 406 of the eighth bevel gear is rotatably connected to the side wall of the box 1 and is equipped with several ninth bevel gears 404. The ninth bevel gears 404 are meshed with a tenth bevel gear 405. The tenth bevel gear 405 is used to drive the fan 407 to rotate, so that multiple fans 407 can rotate simultaneously. The other end of the air outlet pipe 6 is rotatably connected to the first partition 10 and extends to the fan 407. The second partition 16 is provided with a filter screen 9 corresponding to the installation position of the fan 407. The filter screen 9 is used to filter out dust in the air. A hollow part 17 is opened at the position corresponding to the filter screen 9 on the right side wall of the box 1.

[0037] Please continue reading. Figure 1 and Figure 2Semiconductor coolers 14 are installed on both the front and rear surfaces of the box body 1. The cold ends of the semiconductor coolers 14 are connected by several cooling plates 15. The cooling plates 15 are located between the air inlet end of the air outlet pipe 6 and the fan 407. The cooling plates 15 are made of copper or aluminum and have ribs. The cooling plates 15 are used to cool the air entering the air outlet pipe 6.

[0038] Please continue reading. Figures 1-3 The bottom wall of the box body 1 has a first groove 18, and several first through slots 12 are equally spaced on the bottom wall of the box body 1. A movable plate 11 is slidably connected to the bottom wall of the box body 1 through the first groove 18. Several second through slots 13 are equally spaced on the movable plate 11. The first through slots 12 are spaced apart on the bottom wall of the box body 1, and the distance between adjacent second through slots 13 is greater than the width of the first through slot 12. The distance between adjacent first through slots 12 is greater than the width of the second through slot 13. The left end of the movable plate 11 is threadedly connected to a first lead screw 20 through a second groove 19. The second groove 19 is a threaded groove. The first lead screw 20 is rotatably connected to the side wall of the first groove 18, and a sixth bevel gear 314 is installed on the outer surface of the first lead screw 20. The third bevel gear shaft 311 A fifth bevel gear 313 is fixedly connected to the bottom end of the device. The fifth bevel gear 313 meshes with the sixth bevel gear 314, so that the first bevel gear 303 and the second bevel gear 304 can drive the sixth bevel gear 314 to rotate in sequence. It can be understood that when the first bevel gear 303 and the second bevel gear 304 drive the sixth bevel gear 314 to rotate in sequence, the first lead screw 20 will rotate in both directions, thereby driving the movable plate 11 to reciprocate in the first groove 18. This allows the first through groove 12 and the second through groove 13 to alternately switch between overlapping and staggered, so that the cold air can stay in the first chamber 2 inside the box 1 for a period of time. After sufficient heat exchange, the air is discharged from the box 1 through the first through groove 12, thereby improving the utilization rate of the cold air.

[0039] Please see Figures 4-6The right side of the first groove 18 is connected to the fourth chamber 4. The upper surface of the right end of the movable plate 11 is provided with gear teeth and is meshed with a fourth gear 505. The fourth gear 505 is meshed with a fifth gear 506 rotatably connected to the side wall of the box body 1. A twelfth bevel gear 504 is installed on the gear shaft of the fifth gear 506. The twelfth bevel gear 504 is meshed with an eleventh bevel gear 503. A brush plate 21 is provided on the outer side of the filter screen plate 9. The brush plate 21 has a threaded hole and a through hole. The brush plate 21 is threadedly connected to a second lead screw 501 through the threaded hole. The upper end of the second lead screw 501 is rotatably connected to the box body 1. The bottom end of the second lead screw 501 is fixedly connected to the eleventh bevel gear 503. The brush plate 21 is slidably connected to a slide rod through the through hole.

[0040] Please see Figure 1 and Figure 2 Three support rods 23 are installed between the support plate 7 and the vent pipe 6. The middle support rod 23 is higher than the two side support rods 23. The two side support rods 23 are located directly above the first support plate 24. A breathable and waterproof membrane 22 is installed on the three support rods 23. It can be understood that if water vapor inside the box 1 condenses into water droplets, the water droplets will adhere to the inner wall of the box 1. The vibration generated during the movement of the car will cause the water droplets to fall onto the breathable and waterproof membrane 22 and slide down along the breathable and waterproof membrane 22 to the first support plate 24 or the bottom wall of the box 1, without dripping onto the support plate 7. This effectively prevents water droplets from affecting the electronic components on the support plate 7.

[0041] In some embodiments, a third support plate is installed in the fourth chamber 5. The middle part of the second lead screw 501 is rotatably connected to the third support plate. The upper surface of the third support plate is flush with the bottom end of the hollow part 17. When the brush plate 21 cleans the filter screen plate 9, the dust will fall onto the third support plate, which makes it convenient to sweep the dust out of the box 1 later.

[0042] The working principle of this invention is as follows: In practical use, the second motor 401 drives multiple fans 407 to rotate. The fans 407 blow outside air into the air outlet pipe 6. During the airflow, the cooling fins 15 cool the air. Then, the cold air is discharged from the air outlet holes 8 on the air outlet pipe 6, carrying away the heat of the main components on the support plate 7, thereby reducing the temperature of the main components. At the same time, the first motor 301 drives the residual bevel gear 302 to rotate. The residual bevel gear 302 meshes with the first bevel gear 303 and the second bevel gear 304 in sequence, thereby driving the air outlet pipe 6 to rotate around its central axis first in one direction and then in the opposite direction, so that the air outlet direction of the air outlet pipe 6 is different, realizing the adjustment of the blowing angle, thereby blowing cold air towards the support plate 7. The various positions on the carrier plate 7 greatly improve the heat dissipation effect of the carrier plate 7; during the air blowing process of the air outlet pipe 6, the first bevel gear 303 and the second bevel gear 304 drive the movable plate 11 to reciprocate within the bottom wall of the box body 1, thereby driving the brush plate 21 to reciprocate. The brush plate 21 removes the dust attached to the outside of the filter screen plate 9, preventing the dust from clogging the filter screen plate 9 and affecting the air intake effect. In addition, during the reciprocating motion of the movable plate 11 within the bottom wall of the box body 1, the first through groove 12 and the second through groove 13 alternately switch between overlapping and staggered, so that the cold air can stay in the first chamber 2 within the box body 1 for a period of time, thereby improving the utilization rate of the cold air. The air after sufficient heat exchange is then discharged from the box body 1 through the first through groove 12.

[0043] Example 2

[0044] The present invention provides an electric vehicle, including a low-voltage control box as described in Example 1.

[0045] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0046] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0047] Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The reference to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily indicate the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0048] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A low-voltage control box, comprising a box body (1), characterized in that: The box body (1) is equipped with two vertically arranged first partitions (10), and a support plate (7) is installed between the two first partitions (10). The support plate (7) is used to install electronic components. Several vent pipes (6) are arranged above the support plate (7). Several vent holes (8) are opened along the axial direction of the vent pipes (6). A first motor (301) is installed in the second chamber (3) between the left side wall of the box body (1) and the first partition (10). The output end of the first motor (301) is fixedly connected to a bevel gear (302). The bevel gear (302) is intermittently meshed with a first bevel gear (303) and a second bevel gear (304). One end of the vent pipe (6) is connected to the first partition (10). After being rotated and connected, it extends into the first chamber (3) and is equipped with a first gear (309). The first gear (309) on the adjacent air outlet pipe (6) is connected by a second gear (310). The first bevel gear (303) and the second bevel gear (304) drive the first gear (309) to rotate in sequence through the first transmission mechanism. The second motor (401) and the fan (407) are installed in the third chamber (4) between the right side wall of the box (1) and the first partition (10). The output end of the second motor (401) drives the fan (407) to rotate through the second transmission mechanism. The other end of the air outlet pipe (6) is rotated and connected to the first partition (10) and extends to the fan (407). The bottom wall of the box (1) is provided with a first through groove (12). Among them, a second partition (16) is installed between the second motor (401) and the right side wall of the box (1). A filter screen plate (9) is provided on the second partition (16). A brush plate (21) is provided on the outside of the filter screen plate (9). The brush plate (21) is provided with a threaded hole and a through hole. The brush plate (21) is threadedly connected to a second lead screw (501) through the threaded hole. The upper end of the second lead screw (501) is rotatably connected to the box (1). The bottom end of the second lead screw (501) is fixedly connected to an eleventh bevel gear (503). The brush plate (21) is slidably connected to a slide rod through the through hole. The first bevel gear (303) and the second bevel gear (304) drive the eleventh bevel gear (503) to rotate through the third transmission mechanism. The third transmission mechanism includes at least a movable plate (11) disposed in the bottom wall of the box body (1). The bottom wall of the box body (1) is slidably connected to the movable plate (11) by opening a first groove (18). The movable plate (11) is provided with a plurality of second through grooves (13) spaced apart. The first through grooves (12) are spaced apart on the bottom wall of the box body (1), and the distance between adjacent second through grooves (13) is greater than the width of the first through grooves (12). The distance between adjacent first through grooves (12) is greater than the width of the second through grooves (13). The left end of the movable plate (11) is screwed through a second groove (19). The first lead screw (20) is connected to the second groove (19), which is a threaded groove. The first lead screw (20) is rotatably connected to the first groove (18), and a sixth bevel gear (314) is installed on the outer surface of the first lead screw (20). The first bevel gear (303) and the second bevel gear (304) drive the sixth bevel gear (314) to rotate through the fourth transmission mechanism. The upper surface of the right end of the movable plate (11) is provided with gear teeth and meshes with a fourth gear (505). The fourth gear (505) meshes with the eleventh bevel gear (503) through the fifth transmission mechanism. The bearing plate (7) is mounted on the first partition plate (10) at both ends via the first support plate (24). The first support plate (24) is L-shaped. Three support rods (23) are provided between the bearing plate (7) and the air outlet pipe (6). The middle support rod (23) is higher than the two side support rods (23). The two side support rods (23) are located directly above the first support plate (24). A breathable and waterproof membrane (22) is provided on the three support rods (23).

2. A low-voltage control box according to claim 1, characterized in that: Semiconductor coolers (14) are installed on both the front and rear surfaces of the box (1). The cold end of the semiconductor cooler (14) is connected by several cooling plates (15), and the cooling plates (15) are located between the air inlet end of the air outlet pipe (6) and the fan (407).

3. A low-voltage control box according to claim 1, characterized in that: The second transmission mechanism includes a seventh bevel gear (402) fixedly connected to the output end of the second motor (401), the seventh bevel gear (402) meshing with an eighth bevel gear (403), the eighth bevel gear (406) being rotatably connected to the side wall of the box (1) and having several ninth bevel gears (404) installed thereon, the ninth bevel gears (404) meshing with a tenth bevel gear (405), and the tenth bevel gear (405) being used to drive the fan (407) to rotate.

4. A low-voltage control box according to claim 1, characterized in that: The right side wall of the box (1) has a hollow part (17) corresponding to the filter screen (9).

5. A low-voltage control box according to claim 1, characterized in that: The fifth transmission mechanism further includes a fifth gear (506) rotatably connected to the side wall of the box (1). A twelfth bevel gear (504) is mounted on the gear shaft of the fifth gear (506), and the twelfth bevel gear (504) is meshed with the eleventh bevel gear (503).

6. A low-voltage control box according to claim 2, characterized in that: The cooling plate (15) is made of copper or aluminum and has ribs.

7. An electric vehicle, characterized in that, Includes a low-voltage control box as described in any one of claims 1 to 6.

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