An LED lamp for exterior lighting of off-road vehicles

Abstract

This application discloses an LED external lighting fixture for off-road vehicles, relating to the field of vehicle lighting technology, including a fixing component and an air supply component. The fixing component includes a fixing shell, a mounting base, a mounting bracket, and a circuit board. The fixing shell is detachably disposed on one side of the mounting base. The fixing shell and the mounting base are fixed to the vehicle's headlight, and the openings of the fixing shell and the mounting base face the vehicle's driving direction. The mounting bracket is fixed inside the fixing shell. The circuit board is fixed on the side of the mounting bracket near the mounting base. The air supply component is disposed inside the mounting base. Multiple shape memory alloys can be used to separately control multiple pressing plates, improving heat dissipation efficiency. Since different components or areas on the circuit board may generate different amounts of heat, by allowing each pressing plate to adjust the degree of compression on the cooling tube according to the actual temperature of the corresponding area, it can ensure that areas with higher heat receive stronger air cooling, thereby improving overall heat dissipation efficiency.

Description

Technical Field

[0001] This invention relates to the field of automotive lighting technology, and more particularly to an LED external lighting fixture for off-road vehicles. Background Technology

[0002] An off-road vehicle is a car specifically designed for off-road driving, primarily referring to vehicles capable of operating on rough terrain. The headlights of an off-road vehicle, including daytime running lights, play a significant role in driving safety. They enhance vehicle visibility; headlights are the lights on a vehicle, serving as illumination for nighttime driving and also as indicators of various driving signals.

[0003] In existing technology, the thermal expansion and contraction properties of shape memory alloy pillars are utilized. When heated, the shape memory alloy pillars contract, causing a pressure plate to move towards the circuit board. The pressure plate flattens the capillary network, increasing the contact area between the capillary network and the circuit board, increasing the air pressure inside the capillary network, and thus increasing the airflow speed within the entire daylight. This facilitates rapid heat dissipation for the lighting assembly and circuit board, and quickly dries the lamp cover. Combined with the pressure applied by the electric push rod and the pressure applied by the heated shape memory alloy pillars, this technology can quickly dissipate heat from the circuit board and lighting assembly, and clean condensation and rainwater from the lamp cover, even when the car is moving slowly. However, during use, the circuit board heats up at different levels and at different temperatures. When the shape memory alloy pillars press the pressure plate onto the capillary network, the pressure cannot be adjusted according to the degree of heat generation, preventing the capillary network in the hottest areas of the circuit board from adhering more closely to the board. When the capillary network is interleaved, it is easy to cause blockage when the capillary network is squeezed. For example, in the LED front combination daytime running light provided by authorization announcement number CN111911884B, during the car's operation, the external air passes through the air inlet mesh in sequence through the front air inlet gap and the rear air inlet gap, and enters the air box through the air inlet pipe. At this time, the electric push rod drives the air compressor to compress the air, and discharges the air through the connecting pipe into the filter box for dehumidification and filtration. The filtered and dehumidified air is then forced into the capillary network and distributed throughout the entire circuit board. The heat generated by the circuit board and the lighting assembly is exchanged with the heat dissipated by the cold air in the capillary network relative to the circuit board. The heated air enters the cavity on the front side of the circuit board and continues to dissipate heat at the connection between the lighting assembly and the circuit board. Finally, it is discharged through the exhaust gap and forms an air curtain that is discharged through the long holes of the air curtain to the lamp cover, cleaning the dust on the outer wall of the lamp cover and drying the lamp cover with water mist.

[0004] It has significant drawbacks: During use, the heat generation and temperature vary at different points on the circuit board. When the shape memory alloy pillars drive the pressure plate to press the capillary network, the pressure of the pressure plate on the capillary network cannot be determined according to the different heat generation levels, so that the capillary network in the heat-generating areas of the circuit board fits the circuit board more closely. At the same time, the staggered arrangement of the capillary networks makes it easy to cause blockage when the capillary network is squeezed. Summary of the Invention

[0005] This application provides an LED external lighting fixture for off-road vehicles, solving the problem that in existing technologies, different parts of the circuit board generate different amounts of heat and temperatures during use. When the shape memory alloy pillars press the pressure plate onto the capillary network, the pressure cannot be adjusted according to the different heat levels, preventing the capillary network in the hottest areas of the circuit board from adhering more closely to the board. Furthermore, the staggered arrangement of the capillary networks can easily cause blockages during compression. This application achieves separate control of multiple pressure plates by multiple shape memory alloy pillars, improving heat dissipation efficiency. Since different components or areas on the circuit board may generate different amounts of heat, by allowing each pressure plate to adjust the compression of the cooling tubes according to the actual temperature of its corresponding area, a stronger air-cooling effect can be ensured in areas with higher heat, thereby improving overall heat dissipation efficiency. It also extends component lifespan by precisely controlling the heat dissipation intensity of each area, ensuring that all components on the circuit board operate within the ideal temperature range, thus extending their lifespan. Additionally, by changing the distribution of the cooling tubes, it prevents blockages caused by compression, which could hinder gas delivery and reduce cooling effectiveness.

[0006] This application provides an LED external lighting fixture for an off-road vehicle, including a fixing component and an air supply component;

[0007] The fixing assembly includes a fixing shell, a mounting base, a mounting bracket, and a circuit board;

[0008] The fixing shell is detachably mounted on one side of the mounting base;

[0009] The fixing shell and mounting base are fixed to the headlights of the car, and the openings of the fixing shell and mounting base face the driving direction of the car.

[0010] The mounting bracket is fixed inside the fixed housing;

[0011] The circuit board is fixed to the side of the mounting bracket near the mounting base, and the circuit board is coated with an insulating layer.

[0012] The gas supply component is installed inside the mounting base;

[0013] It also includes a cooling component, which comprises a cooling group;

[0014] The cooling assembly includes a cooling tube, a shape memory alloy, and a pressure plate;

[0015] There are two cooling tubes. The cooling tubes are fixed on the side of the circuit board away from the mounting bracket. The lower end of the cooling tube is connected to the air supply component, and the upper end of the cooling tube is connected to the cavity on the side of the mounting bracket away from the mounting base.

[0016] One end of the shape memory alloy is fixed to the side of the circuit board away from the mounting bracket, the shape memory alloy is located between the two cooling tubes, and the pressing plate is fixed to the end of the shape memory alloy away from the circuit board.

[0017] The shape memory alloy and the pressing plate are each in multiple quantities and correspond one-to-one; the multiple shape memory alloys are evenly spaced along the length of the cooling tube.

[0018] There are multiple cooling groups, which are evenly spaced.

[0019] As an improvement, the fixing shell is a cylindrical shape that runs through the top and bottom, and the mounting base is a cylindrical shape with an open top. The axes of the fixing shell and the mounting base are on the same straight line, and the axis of the fixing shell is parallel to the ground.

[0020] The cavity of the fixed shell and the opening of the mounting base are both cylindrical, and their axes are on the same straight line. The axis of the cavity of the fixed shell is on the same straight line as the axis of the fixed shell, and the cavity of the fixed shell is connected to the opening of the mounting base.

[0021] The mounting bracket is cylindrical, and the axis of the mounting bracket is on the same straight line as the axis of the fixed shell. The outer wall of the mounting bracket is fixed to the inner wall of the fixed shell.

[0022] The length of the cooling pipe is perpendicular to the ground;

[0023] The pressing plate is rectangular in shape, and its length direction is perpendicular to the ground.

[0024] As an improvement, the shape memory alloy, when heated, causes the pressing plate to retract and compress the cooling tube;

[0025] The cooling tube is made of silicone.

[0026] The height of the uppermost end of the cooling tube is higher than the height of the uppermost end of the circuit board, and the height of the lowermost end of the cooling tube is lower than the height of the lowermost end of the circuit board.

[0027] The height of the upper side of the topmost pressing plate is higher than the height of the topmost part of the circuit board, and the height of the lower side of the bottommost pressing plate is lower than the height of the bottommost part of the circuit board.

[0028] Both the shape memory alloy and the cooling tube are fixed to the insulating layer on the surface of the circuit board.

[0029] As an improvement, the mounting assembly also includes an intake pipe, an exhaust pipe, an exhaust port, a filter, a light, and a lampshade;

[0030] The lighting lamp is detachably mounted on the side of the mounting bracket away from the circuit board, and the lighting lamp is electrically connected to the circuit board;

[0031] The lampshade is fixed inside the mounting housing, and the lampshade is located on the side of the lighting fixture away from the mounting bracket;

[0032] The end of the fixed shell away from the mounting base has an air intake pipe;

[0033] The side wall of the fixed housing has an exhaust pipe, and the two ends of the exhaust pipe are respectively connected to the cavities on both sides of the fixed housing separated by the lampshade. The end of the exhaust pipe away from the mounting base faces the lampshade.

[0034] The mounting base has an air vent on its side wall;

[0035] There are three filters, which correspond one-to-one with the air intake pipe, the air exhaust pipe and the air outlet. The three filters are fixed in the air intake pipe at the end away from the mounting base, the air exhaust pipe at the end away from the mounting base and the air outlet, respectively.

[0036] The gas supply assembly includes a gas box, a compressor rod, a connecting pipe one, a connecting pipe two, a filter box, a gas delivery pipe one, and a branch pipe;

[0037] The gas box is a cylindrical shape with an open top. The axis of the gas box is perpendicular to the ground. The gas box is fixed to the bottom side of the opening of the mounting base. The lower end of the air compressor rod is sealed and slides inside the gas box. The upper end of the air compressor rod is fixed to the top side inside the mounting base. The lower end of the air compressor rod can compress the gas inside the gas box.

[0038] One end of each of the connecting pipes is connected to the inside of the air box. The end of the connecting pipe away from the air box is connected to the air inlet pipe. The filter box is detachably installed on the bottom side of the opening of the mounting base. The end of the connecting pipe away from the air box is connected to the input end of the filter box. One end of the air supply pipe is connected to the output end of the filter box.

[0039] Electric check valves are fixed on all three of the connecting pipes: the first connecting pipe, the second connecting pipe, and the first gas transmission pipe.

[0040] The lower end of the cooling tube is fixed with a diversion tube, and the diversion tube is connected to one end of the gas supply tube that is away from the filter box.

[0041] The cooling assembly also includes a cooling connecting pipe, the length direction of which is perpendicular to the length direction of the cooling tube. The cooling connecting pipe is fixed on the side of the circuit board away from the lighting lamp. The two ends of the cooling connecting pipe are respectively fixed on the side of the two cooling tubes that are close to each other, and the cooling connecting pipe is connected to the two cooling tubes. There are multiple cooling connecting pipes, which are evenly spaced.

[0042] As an improvement, the electric check valve on the first connecting pipe only allows external gas to enter the gas box, the electric check valve on the second connecting pipe only allows external gas to enter the filter box, and the electric check valve on the first gas delivery pipe only allows gas to exit from the filter box.

[0043] As an improvement, the cooling component also includes an adjustment group;

[0044] The number of adjustment groups is consistent with the number of shape memory alloys, and they correspond one-to-one.

[0045] The adjustment assembly includes a port, a guide post, an inner retraction plate, and a traction rope;

[0046] The four components—the inlet, guide post, inner shrink plate, and traction rope—each have two parts, and are divided into two groups. Each group of inlets, guide posts, inner shrink plates, and traction ropes corresponds to one of the two cooling pipes.

[0047] The guide post is cylindrical, and its axis is parallel to the axis of the fixed shell. The guide post is located on both sides of the shape memory alloy, and the axis of the guide post is located on the path between the shape memory alloy and the cooling tube. One end of the guide post is fixed to the side of the circuit board away from the mounting bracket.

[0048] The pressing plate has a through-hole, the axis of the through-hole is on the same straight line as the axis of the guide post, and the guide post slides inside the through-hole;

[0049] The inner shrink plate is rectangular, and its length direction is parallel to that of the pressing plate. The inner shrink plate is located on the side of the pressing plate closer to the cooling tube, and on the side of the guide post away from the shape memory alloy. The side of the inner shrink plate closer to the guide post is fixed to the pressing plate, and the connection between the inner shrink plate and the pressing plate is made of rubber.

[0050] One end of the traction rope is fixed to the guide post, and the end of the traction rope away from the guide post is fixed to the end of the inner shrink plate away from the guide post.

[0051] The diameter of the opening is long enough for the guide post and the traction rope to enter together.

[0052] As an improvement, the height of the uppermost end of the inner shrink plate is the same as the height of the uppermost end of the pressing plate, and the height of the lowermost end of the inner shrink plate is the same as the height of the lowermost end of the pressing plate.

[0053] In the initial state, the traction rope is in a slack state. When the inner shrink plate contacts the cooling tube, the traction rope is in a taut state. When the shape memory alloy is heated and shrinks back to its final state, the traction rope will not break.

[0054] As an improvement, the cooling assembly also includes a jet nozzle, a second air supply pipe, a support, and a third connecting pipe;

[0055] The inner shrink plate has a jet nozzle on the side away from the cooling pipe, and the jet nozzle is located at the end of the inner shrink plate away from the guide post. There are multiple jet nozzles, which are evenly spaced.

[0056] The inner plate has an air jet pipe inside, and one end of the air jet pipe is connected to the air jet port;

[0057] The bracket is fixed to the top side of the inner wall of the fixed shell. The bracket is a hollow structure. One side of the bracket has a connecting pipe three. The end of the connecting pipe three away from the bracket is connected to the gas supply pipe one. The connecting pipe three is equipped with an electric check valve. The electric check valve on the connecting pipe three only allows gas in the gas supply pipe one to enter the connecting pipe three.

[0058] The number of gas supply pipes is the same as the number of pressing plates, and they correspond one-to-one. One end of the gas supply pipe is fixed on the bracket, and the end of the gas supply pipe away from the gas supply pipe is fixed on the pressing plate.

[0059] One end of the connecting pipe three and the gas supply pipe two are respectively connected to the cavity of the bracket. The pressing plate has an internal hollow structure, and the gas supply pipe two is connected to the cavity of the pressing plate.

[0060] The end of the jet pipe inside the inner shrink plate that is away from the jet outlet passes through the rubber material at the connection between the inner shrink plate and the pressing plate and communicates with the cavity of the pressing plate.

[0061] The second gas transmission pipe is a telescopic pipe.

[0062] As an improvement, the off-road vehicle external lighting LED lights also include a wrap-around panel;

[0063] The number of the wrapping plates is the same as the number of the inner shrinking plates, and they correspond one-to-one;

[0064] The wrapping plate is arc-shaped, and the side of the wrapping plate away from its axis and the end of the wrapping plate away from the inner shrink plate are both equipped with exhaust ports. There are multiple exhaust ports, which are evenly spaced.

[0065] The wrapping plate is located at the end of the inner shrink plate away from the shape memory alloy. The side of the wrapping plate near the cooling tube is hinged to the inner shrink plate. The wrapping plate and the shape memory alloy are connected by rubber.

[0066] The exhaust port of the wrapping plate is connected to the jet pipe inside the inner shrink plate.

[0067] As an improvement, the axis of the wrapping plate is parallel to the length direction of the inner shrinking plate, the uppermost height of the wrapping plate is the same as the uppermost height of the inner shrinking plate, and the lowermost height of the wrapping plate is the same as the lowermost height of the inner shrinking plate.

[0068] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0069] Firstly, multiple shape memory alloys separately control multiple pressure plates, improving heat dissipation efficiency. Since different components or areas on the circuit board may generate different amounts of heat, by allowing each pressure plate to adjust the degree of compression on the cooling tube according to the actual temperature of the corresponding area, it is possible to ensure that areas with higher heat receive stronger air cooling, thereby improving overall heat dissipation efficiency. Secondly, it extends component lifespan. By precisely controlling the heat dissipation intensity of each area, it is possible to ensure that all components on the circuit board operate within the ideal temperature range, thereby extending their lifespan. Furthermore, by changing the distribution of the cooling tubes, it is possible to prevent the cooling tubes from becoming blocked due to compression, thus preventing gas from being delivered and reducing the cooling effect.

[0070] Secondly, it enhances heat dissipation. By squeezing the cooling tubes inward with the inner shrink plate, the contact between the cooling tubes and the circuit board becomes tighter, thereby increasing the heat dissipation area and improving heat dissipation efficiency. This helps to conduct heat from the circuit board to the cooling tubes more quickly, and then remove the heat through air cooling. It also optimizes heat dissipation distribution. Different areas of the circuit board generate different amounts of heat, and the inner shrink plate can selectively squeeze the cooling tubes in different areas according to the actual temperature distribution. The greater the degree of retraction of the pressing plate, the greater the degree of squeezing of the inner shrink plate. Areas with higher heat can achieve a stronger heat dissipation effect, while areas with lower heat will not be over-cooled, thus optimizing the heat dissipation effect.

[0071] Thirdly, the active cooling effect is improved. The jet nozzle can actively spray airflow away from the circuit board, increasing the airflow speed and more effectively removing heat from the circuit board; reducing thermal resistance, the airflow from the jet nozzle can form an airflow barrier, reducing the thermal resistance between the circuit board and the external environment, lowering the surface temperature of the circuit board, and improving the heat dissipation effect; preventing dust accumulation, the airflow from the jet nozzle can form a certain wind pressure, and the airflow helps to remove dust from the surface of the circuit board, preventing dust accumulation from affecting the heat dissipation effect; improving system stability, improving the stability and reliability of the entire vehicle light; enhancing environmental adaptability, the jet nozzle's active cooling effect ensures the normal operating temperature of the circuit board in high temperature, high humidity, or dusty environments. When the electric check valve on the connecting pipe three is intermittently opened, it can cause the inner shrink plate to swing intermittently, squeezing the cooling pipe, disturbing the nearby gas, and cooling the circuit board.

[0072] Fourth, the arc-shaped wrapping plate can further restrict the shape of the cooling tube, wrapping it and squeezing it inward. At the same time, the exhaust port on the wrapping plate intermittently sprays air, and the angle changes, which can fan the air flow near the circuit board, turbulent the air, and cool the circuit board. The reaction force generated can act on the cooling tube, causing the cooling tube to sway and drive the air flow. Continuous air spraying can drive the air flow and cool the circuit board. The exhaust port at the end of the wrapping plate away from the inner shrink plate can directly spray air onto the surface of the circuit board, spraying onto the surface of the circuit board of two adjacent cooling tubes in two adjacent cooling groups that are not in contact, directly cooling them. Attached Figure Description

[0073] Figure 1 This is a front sectional view of an LED external lighting fixture for off-road vehicles according to the present invention;

[0074] Figure 2 This is a schematic diagram of the cooling pipe of an off-road vehicle external lighting LED lamp mounted on a circuit board according to the present invention.

[0075] Figure 3 This is a schematic diagram of the installation of a cooling connecting pipe for an off-road vehicle external lighting LED lamp according to the present invention;

[0076] Figure 4 This is a schematic diagram of the installation of a pressing plate and a shape memory alloy for an off-road vehicle external lighting LED lamp according to the present invention;

[0077] Figure 5 This is a schematic diagram showing the distribution of the pressing plates of an LED external lighting fixture for off-road vehicles according to the present invention;

[0078] Figure 6 This is a schematic diagram of the installation of the inner recess plate of the LED lamp for external lighting of an off-road vehicle according to the present invention;

[0079] Figure 7 This is a schematic diagram of the pressing plate driving the inner retracting plate to move in an LED lamp for external lighting of an off-road vehicle according to the present invention;

[0080] Figure 8 This is a schematic diagram of the inner shrink plate extrusion cooling tube of an off-road vehicle external lighting LED lamp according to the present invention;

[0081] Figure 9 This is a schematic diagram of the installation of the air supply pipe 2 of the LED external lighting fixture for off-road vehicles according to the present invention;

[0082] Figure 10 This is a schematic diagram showing the jet direction of the jet nozzle of an LED external lighting fixture for off-road vehicles according to the present invention;

[0083] Figure 11This is a schematic diagram of the jet nozzle distribution of an LED external lighting fixture for an off-road vehicle according to the present invention;

[0084] Figure 12 This is a schematic diagram of the mounting plate for an external LED lighting fixture for off-road vehicles according to the present invention;

[0085] Figure 13 This is a schematic diagram of a cooling pipe wrapped in a protective plate for an external LED lighting fixture for an off-road vehicle according to the present invention;

[0086] Figure 14 This is a schematic diagram of the exhaust port distribution on the cover plate of an LED external lighting fixture for an off-road vehicle according to the present invention.

[0087] In the diagram: 100, Fixing component; 110, Fixing housing; 111, Intake pipe; 112, Exhaust pipe; 120, Mounting base; 121, Air outlet; 130, Filter screen; 140, Mounting bracket; 150, Circuit board; 160, Lighting lamp; 170, Lampshade;

[0088] 200. Gas supply assembly; 210. Gas box; 220. Compressor; 230. Connecting pipe one; 240. Connecting pipe two; 250. Filter box; 260. Gas delivery pipe one; 270. Diverter pipe;

[0089] 300. Cooling component; 310. Cooling tube; 320. Shape memory alloy; 330. Pressing plate; 331. Through port; 340. Guide post; 350. Inner retraction plate; 351. Air jet nozzle; 360. Traction rope; 370. Cooling connecting pipe; 380. Gas supply pipe two; 390. Bracket; 391. Connecting pipe three;

[0090] 400. Packaging board. Detailed Implementation

[0091] To facilitate understanding of the present invention, a more complete description of this application will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of the present invention.

[0092] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0093] 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 limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0094] When the lighting lamp 160 is in use, the electric check valves on connecting pipe 1 230, connecting pipe 2 240, and air supply pipe 1 260 open simultaneously, the air compressor 220 is activated, and air enters the air intake pipe 111 and is delivered to the air box 210 through connecting pipe 1 230. The air is then compressed by the air compressor 220 and delivered to the filter box 250. After being filtered by the filter box 250, the air is delivered through air supply pipe 260 and the diverter pipe 270 into the cooling pipe 310. The cooling pipe 310 dissipates heat from the circuit board 150. As the air continuously passes through the cooling pipe 310, its heat increases, and it is discharged from the upper end of the cooling pipe 310, heating the surface of the lighting lamp 160 and the lampshade 170 for defogging. The gas can then be discharged through the exhaust pipe 112. When the lighting lamp 160 is in use and the circuit board 150 is dissipating heat, the heat will cause the shape memory alloy 320 to deform, causing the pressing plate 330 to approach the cooling tube 310 and squeeze the cooling tube 310, making the cooling tube 310 fit more closely to the circuit board 150, increasing the heat dissipation contact area. The cooling tube 310 is under pressure, thereby increasing the internal air pressure and increasing the airflow speed inside the cooling tube 310, which quickly dissipates heat from the circuit board 150. After long-term use, the mounting base 120 can be disassembled to clean the filter box 250. The insulation layer on the outside of the circuit board 150 can prevent the shape memory alloy 320 and the cooling tube 310 from affecting the normal operation of the circuit board 150.

[0095] Example 1: As Figures 1-5 As shown, this application discloses an LED lamp for external lighting of an off-road vehicle, including a fixing assembly 100 and an air supply assembly 200;

[0096] The fixing assembly 100 includes a fixing shell 110, a mounting base 120, a mounting bracket 140, and a circuit board 150;

[0097] The fixed shell 110 is a cylindrical shape that runs vertically through the top and bottom, and the mounting base 120 is a cylindrical shape with an open top. The axes of the fixed shell 110 and the mounting base 120 are on the same straight line, and the axis of the fixed shell 110 is parallel to the ground.

[0098] The fixed shell 110 is detachably disposed on one side of the mounting base 120. The cavity of the fixed shell 110 and the opening of the mounting base 120 are both cylindrical, and their axes are on the same straight line. The axis of the cavity of the fixed shell 110 is on the same straight line as the axis of the fixed shell 110. The cavity of the fixed shell 110 is connected to the opening of the mounting base 120.

[0099] The fixing housing 110 and the mounting base 120 are fixed to the headlights of the car, and the openings of the fixing housing 110 and the mounting base 120 face the driving direction of the car.

[0100] The mounting bracket 140 is cylindrical, and the axis of the mounting bracket 140 is on the same straight line as the axis of the fixed shell 110. The mounting bracket 140 is fixed inside the fixed shell 110, and the outer wall of the mounting bracket 140 is fixed to the inner wall of the fixed shell 110.

[0101] The circuit board 150 is fixed to the side of the mounting bracket 140 near the mounting base 120, and the circuit board 150 is coated with an insulating layer.

[0102] The gas supply component 200 is disposed within the mounting base 120;

[0103] It also includes a cooling component 300, which comprises a cooling group;

[0104] The cooling assembly includes a cooling tube 310, a shape memory alloy 320, and a pressing plate 330;

[0105] There are two cooling tubes 310. The cooling tube 310 is fixed on the side of the circuit board 150 away from the mounting bracket 140. The length direction of the cooling tube 310 is perpendicular to the ground. The lower end of the cooling tube 310 is connected to the air supply component 200. The upper end of the cooling tube 310 is connected to the cavity on the side of the mounting bracket 140 away from the mounting base 120.

[0106] One end of the shape memory alloy 320 is fixed to the side of the circuit board 150 away from the mounting bracket 140. The shape memory alloy 320 is located between the two cooling tubes 310. The pressing plate 330 is cuboid in shape. The length direction of the pressing plate 330 is perpendicular to the ground. The pressing plate 330 is fixed to the end of the shape memory alloy 320 away from the circuit board 150.

[0107] There are multiple shape memory alloys 320 and multiple pressing plates 330, and they correspond one-to-one; the multiple shape memory alloys 320 are evenly distributed at intervals along the length of the cooling tube 310.

[0108] When heated, the shape memory alloy 320 drives the pressing plate 330 to retract and compress the cooling tube 310.

[0109] There are multiple cooling groups, which are evenly spaced.

[0110] The cooling tube 310 is made of silicone tube material;

[0111] The height of the uppermost end of the cooling tube 310 is higher than the height of the uppermost end of the circuit board 150, and the height of the lowermost end of the cooling tube 310 is lower than the height of the lowermost end of the circuit board 150.

[0112] The height of the upper side of the uppermost pressing plate 330 is higher than the height of the uppermost part of the circuit board 150, and the height of the lower side of the lowermost pressing plate 330 is lower than the height of the lowermost part of the circuit board 150.

[0113] Both the shape memory alloy 320 and the cooling tube 310 are fixed on the insulating layer on the surface of the circuit board 150.

[0114] The fixed assembly 100 also includes an air inlet pipe 111, an exhaust pipe 112, an air outlet 121, a filter screen 130, a lighting lamp 160, and a lamp cover 170;

[0115] The lighting lamp 160 is detachably mounted on the side of the mounting bracket 140 away from the circuit board 150, and the lighting lamp 160 is electrically connected to the circuit board 150;

[0116] The lampshade 170 is fixed inside the fixing housing 110, and the lampshade 170 is located on the side of the lighting lamp 160 away from the mounting bracket 140;

[0117] The fixed housing 110 has an air intake pipe 111 at the end away from the mounting base 120;

[0118] The side wall of the fixed housing 110 has an exhaust pipe 112. The two ends of the exhaust pipe 112 are respectively connected to the cavities on both sides of the fixed housing 110 separated by the lamp cover 170. The end of the exhaust pipe 112 away from the mounting base 120 faces the lamp cover 170.

[0119] The mounting base 120 has an air vent 121 on its side wall;

[0120] There are three filters 130, which correspond one-to-one with the intake pipe 111, the exhaust pipe 112 and the outlet 121 respectively. The three filters 130 are fixed in the intake pipe 111 at the end away from the mounting base 120, the exhaust pipe 112 at the end away from the mounting base 120 and the outlet 121 respectively.

[0121] The gas supply assembly 200 includes a gas box 210, a compressor rod 220, a connecting pipe 230, a connecting pipe 240, a filter box 250, a gas delivery pipe 260, and a branch pipe 270.

[0122] The air box 210 is a cylindrical shape with an open top. The axis of the air box 210 is perpendicular to the ground. The air box 210 is fixed to the bottom side of the opening of the mounting base 120. The lower end of the air compressor 220 is sealed and slides inside the air box 210. The upper end of the air compressor 220 is fixed to the top side inside the mounting base 120. The lower end of the air compressor 220 can compress the gas inside the air box 210.

[0123] One end of each of the connecting pipe 230 and the connecting pipe 240 is connected to the inside of the air box 210. The end of the connecting pipe 230 away from the air box 210 is connected to the air inlet pipe 111. The filter box 250 is detachably mounted on the bottom side of the opening of the mounting base 120. The end of the connecting pipe 240 away from the air box 210 is connected to the input end of the filter box 250. One end of the air supply pipe 260 is connected to the output end of the filter box 250.

[0124] Electric check valves are fixed on the first connecting pipe 230, the second connecting pipe 240, and the first gas supply pipe 260. The electric check valve on the first connecting pipe 230 only allows external gas to enter the gas box 210, the electric check valve on the second connecting pipe 240 only allows external gas to enter the filter box 250, and the electric check valve on the first gas supply pipe 260 only allows gas to exit from the filter box 250.

[0125] The lower end of the cooling pipe 310 is fixed with a diversion pipe 270, and the diversion pipe 270 is connected to the end of the gas supply pipe 260 away from the filter box 250.

[0126] The cooling assembly 300 also includes a cooling connecting pipe 370. The length direction of the cooling connecting pipe 370 is perpendicular to the length direction of the cooling pipe 310. The cooling connecting pipe 370 is fixed on the side of the circuit board 150 away from the lighting lamp 160. The two ends of the cooling connecting pipe 370 are respectively fixed on the side of the two cooling pipes 310 that are close to each other, and the cooling connecting pipe 370 is connected to the two cooling pipes 310. There are multiple cooling connecting pipes 370, which are evenly spaced.

[0127] The filter box 250 and the air compressor 220 are existing technologies and will not be described in detail here.

[0128] When the lighting lamp 160 is in use, the electric check valves on connecting pipe 1 230, connecting pipe 2 240, and air supply pipe 1 260 open together, the air compressor 220 is activated, and air enters the air intake pipe 111 and is delivered to the air box 210 through connecting pipe 1 230. The air is then compressed by the air compressor 220 and delivered to the filter box 250. After being filtered by the filter box 250, the air is delivered through air supply pipe 1 260 and the diverter pipe 370 into the cooling pipe 310. The cooling pipe 310 dissipates heat from the circuit board 150. As the air continuously passes through the cooling pipe 310, the heat increases, and the air is discharged from the upper end of the cooling pipe 310, heating the surface of the lighting lamp 160 and the lampshade 170 for defogging. Afterwards, the gas can be discharged through the exhaust pipe 112. When the lighting lamp 160 is in use and the circuit board 150 dissipates heat, the heat will cause the shape memory alloy 320 to deform, causing the pressing plate 330 to approach the cooling tube 310 and squeeze the cooling tube 310, making the cooling tube 310 fit more closely to the circuit board 150, increasing the heat dissipation contact area. The cooling tube 310 is under pressure, thereby increasing the internal air pressure, thereby increasing the air flow speed inside the cooling tube 310, and quickly dissipating heat for the circuit board. After long-term use, the mounting base 120 can be disassembled to clean the filter box 250. The insulation layer on the outside of the circuit board 150 can prevent the shape memory alloy 320 and the cooling tube 310 from affecting the normal operation of the circuit board 150.

[0129] Compared with existing technologies, multiple shape memory alloys 320 separately control multiple pressing plates 330, improving heat dissipation efficiency. Since different components or areas on the circuit board 150 may generate different amounts of heat, by allowing each pressing plate 330 to adjust the degree of compression on the cooling tube 310 according to the actual temperature of the corresponding area, it can ensure that areas with higher heat receive stronger air cooling, thereby improving overall heat dissipation efficiency; extend component lifespan. By precisely controlling the heat dissipation intensity of each area, it can ensure that all components on the circuit board 150 operate within the ideal temperature range, thereby extending their service life; and change the distribution of the cooling tubes 310 to prevent blockage of the cooling tubes 310 due to compression, which would prevent gas delivery and reduce the cooling effect.

[0130] Example 2: In Example 1, the cooling tube 310 is squeezed by the installed pressing plate 330, causing it to deform and adhere to the circuit board 150. The higher the heat at a certain point on the circuit board 150, the stronger the squeezing force of the pressing plate 330 due to the retraction of the shape memory alloy 320. During the squeezing process, the cooling tube 310 automatically expands to both sides, making it impossible to control the cooling tube 310 to deform independently towards the side closer to the shape memory alloy 320. This increases the contact area with the heat-generating part, thus achieving cooling. Based on this, the solution of Example 1 is improved, such as... Figures 6-8As shown:

[0131] The cooling component 300 also includes an adjustment group;

[0132] The number of adjustment groups is consistent with the number of shape memory alloy 320, and they correspond one-to-one.

[0133] The adjustment assembly includes a port 331, a guide post 340, an inner retraction plate 350, and a traction rope 360.

[0134] There are two of each of the four components: the opening 331, the guide post 340, the inner shrink plate 350, and the traction rope 360. They are divided into two groups, and the two groups of openings 331, guide posts 340, inner shrink plates 350, and traction ropes 360 correspond one-to-one with the two cooling pipes 310.

[0135] The guide post 340 is cylindrical, and its axis is parallel to the axis of the fixed housing 110. The guide post 340 is located on both sides of the shape memory alloy 320, and its axis is located on the path between the shape memory alloy 320 and the cooling tube 310. One end of the guide post 340 is fixed to the side of the circuit board 150 away from the mounting bracket 140.

[0136] The pressing plate 330 has a through-hole 331, the axis of the through-hole 331 is on the same straight line as the axis of the guide post 340, and the guide post 340 slides in the through-hole 331.

[0137] The inner shrink plate 350 is cuboid in shape. The length direction of the inner shrink plate 350 is parallel to the length direction of the pressing plate 330. The inner shrink plate 350 is located on the side of the pressing plate 330 closer to the cooling tube 310, and the inner shrink plate 350 is located on the side of the guide post 340 away from the shape memory alloy 320. The side of the inner shrink plate 350 closer to the guide post 340 is fixed to the pressing plate 330, and the connection between the inner shrink plate 350 and the pressing plate 330 is made of rubber.

[0138] The height of the uppermost end of the inner shrink plate 350 is the same as the height of the uppermost end of the pressing plate 330, and the height of the lowermost end of the inner shrink plate 350 is the same as the height of the lowermost end of the pressing plate 330.

[0139] One end of the traction rope 360 ​​is fixed to the guide post 340, and the other end of the traction rope 360 ​​away from the guide post 340 is fixed to the other end of the inner shrink plate 350 away from the guide post 340.

[0140] The diameter of the opening 331 allows the guide post 340 and the traction rope 360 ​​to enter together;

[0141] In the initial state, the traction rope 360 ​​is in a slack state. When the inner shrink plate 350 contacts the cooling tube 310, the traction rope 360 ​​is in a taut state. When the shape memory alloy 320 is heated and shrinks back to its final state, the traction rope 360 ​​will not break.

[0142] During use, when the shape memory alloy 320 deforms and moves the pressing plate 330, the inner shrink plate 350 is not pulled by the traction rope 360. When the inner shrink plate 350 contacts the cooling tube 310 during the movement, the traction rope 360 ​​is taut. When the inner shrink plate 350 is squeezed by the shrinking shape memory alloy 320, the inner shrink plate 350 is pulled by the traction rope 360. The traction rope 360 ​​will pull the inner shrink plate 350 inward to squeeze the cooling tube 310. While being squeezed and deformed, the cooling tube 310 will deform on the side facing the shape memory alloy column 320 to dissipate heat from the high-heat areas on the circuit board 150. When the heat of the circuit board 150 decreases and the shape memory alloy 320 drives the pressing plate 330 to reset, the inner shrink plate 350 is pulled back to its original position by the elasticity of the rubber material at the connection with the pressing plate 330.

[0143] To enhance heat dissipation, the inner shrink plate 350 presses the cooling tube 310 inward, making the contact between the cooling tube 310 and the circuit board 150 tighter. This increases the heat dissipation area and improves heat dissipation efficiency, helping to conduct heat from the circuit board 150 to the cooling tube 310 more quickly and remove the heat through air cooling. Furthermore, to optimize heat distribution, different areas of the circuit board 150 generate different amounts of heat. The inner shrink plate 350 can selectively press the cooling tube 310 in different areas according to the actual temperature distribution. The greater the retraction of the pressing plate 330, the greater the compression of the inner shrink plate 350. Areas with higher heat can achieve stronger heat dissipation, while areas with lower heat will not be over-cooled, thus optimizing the heat dissipation effect.

[0144] Example 3: In Example 2, the gas flowing inside the cooling pipe 310 dissipates heat from the surface of the circuit board 150. However, when the car is in operation for a long time and the external temperature is high, the gas flowing inside the cooling pipe 310 is also affected by the temperature, resulting in a decrease in heat dissipation. Furthermore, during prolonged use of the lighting lamp 160, the heat dissipated by the circuit board 150 is poorly cooled by the gas flowing inside the cooling pipe 310. Therefore, the solution in Example 2 is improved as follows: Figures 9-11 As shown:

[0145] The cooling component 300 also includes a jet nozzle 351, a second air supply pipe 380, a bracket 390, and a third connecting pipe 391;

[0146] The inner shrink plate 350 has a jet nozzle 351 on the side away from the cooling pipe 310, and the jet nozzle 351 is located at the end of the inner shrink plate 350 away from the guide post 340. There are multiple jet nozzles 351, which are evenly spaced.

[0147] The inner shrink plate 350 has an air jet pipe inside, and one end of the air jet pipe is connected to the air jet port 351.

[0148] The bracket 390 is fixed to the top side of the inner wall of the fixed shell 110. The bracket 390 has a hollow structure. One side of the bracket 390 has a connecting pipe 391. The end of the connecting pipe 391 away from the bracket 390 is connected to the gas supply pipe 260. The connecting pipe 391 is equipped with an electric check valve. The electric check valve on the connecting pipe 391 only allows gas in the gas supply pipe 260 to enter the connecting pipe 391.

[0149] The number of gas supply pipes 380 is the same as the number of pressing plates 330, and they correspond one-to-one. One end of the gas supply pipe 380 is fixed on the bracket 390, and the end of the gas supply pipe 380 away from the gas supply pipe 380 is fixed on the pressing plate 330.

[0150] One end of the connecting pipe 391 and the gas supply pipe 380 are respectively connected to the cavity of the bracket 390. The pressing plate 330 has an internal hollow structure, and the gas supply pipe 380 is connected to the cavity of the pressing plate 330.

[0151] The end of the jet pipe in the inner shrink plate 350 away from the jet port 351 passes through the rubber material at the connection between the inner shrink plate 350 and the pressing plate 330 and communicates with the cavity of the pressing plate 330.

[0152] The gas transmission pipe 2380 is a telescopic pipe.

[0153] When the lighting lamp 160 is in use, the electric check valve on the connecting pipe 391 is opened, supplying gas to the bracket 390 and the gas supply pipe 380. The gas can be ejected through the nozzle 351. When the inner shrink plate 350 is in contact with the cooling pipe 310, the temperature of the supplied gas also increases when the external temperature is high. The gas is ejected through the nozzle 351 towards the side away from the circuit board 150, which can drive the gas flow and dissipate heat on the large surface of the circuit board 150. The inner shrink plate 350 can act as a heat conduction plate. Through the flow of internal gas, the heat adsorbed by the inner shrink plate 350 and the cooling pipe 310 is quickly dissipated. When the electric check valve on the connecting pipe 391 is opened intermittently, the inner shrink plate 350 can be oscillated intermittently, tapping the cooling pipe 310 and disturbing the nearby gas.

[0154] The active cooling effect is improved. The jet nozzle 351 can actively spray airflow away from the side of the circuit board 150, and by increasing the airflow speed, it can more effectively remove the heat from the circuit board 150. Thermal resistance is reduced. The airflow from the jet nozzle 351 can form an airflow barrier, reducing the thermal resistance between the circuit board 150 and the external environment, lowering the surface temperature of the circuit board 150, and improving the cooling effect. Dust accumulation is avoided. The airflow from the jet nozzle 351 can create a certain wind pressure, and the airflow helps to remove dust from the surface of the circuit board 150, preventing dust accumulation from affecting the cooling effect. System stability is improved, enhancing the stability and reliability of the entire vehicle light. Environmental adaptability is enhanced. The jet from the jet nozzle 351 ensures that the lighting lamp 160 can maintain the normal operating temperature of the circuit board 150 in high temperature, high humidity, or dusty environments through the active cooling effect of the jet nozzle 351. When the electric check valve on the connecting pipe 391 is intermittently opened, the inner shrink plate 350 can be intermittently oscillated, tapping the cooling pipe 310 and disturbing the nearby air, thus cooling the circuit board 150.

[0155] Example 4: In Example 3, the cooling tube 310 is compressed by the inner shrink plate 350, causing it to deform towards the side closer to the shape memory alloy 320. This cools the parts of the circuit board 150 that generate high heat. After the cooling tube 310 is compressed and deformed towards the shape memory alloy 320, a certain gap remains between adjacent cooling tubes 310 in two adjacent cooling groups. The contact area between the cooling tube 310 and the circuit board 150 within this gap is small, resulting in poor overall heat dissipation for the circuit board 150. Based on this, the solution in Example 3 is improved, such as... Figures 12-14 As shown:

[0156] It also includes a 400-inch wrapping board;

[0157] The number of the wrapping plates 400 is the same as the number of the inner shrinking plates 350, and they correspond one-to-one.

[0158] The wrapping plate 400 is arc-shaped, and its axis is parallel to the length direction of the inner shrinking plate 350. The uppermost height of the wrapping plate 400 is the same as the uppermost height of the inner shrinking plate 350, and the lowermost height of the wrapping plate 400 is the same as the lowermost height of the inner shrinking plate 350. The wrapping plate 400 has exhaust ports on the side away from its axis and on the side away from the inner shrinking plate 350. There are multiple exhaust ports, which are evenly spaced.

[0159] The wrapping plate 400 is disposed at the end of the inner shrink plate 350 away from the shape memory alloy 320. The side of the wrapping plate 400 near the cooling tube 310 is hinged to the inner shrink plate 350. The wrapping plate 400 and the inner shrink plate 350 are connected by rubber.

[0160] The exhaust port of the wrapping plate 400 is connected to the jet pipe inside the inner shrink plate 350.

[0161] When the inner shrink plate 350 first contacts the cooling tube 310, the side of the cooling tube 310 away from the shape memory alloy 320 is wrapped by the wrapping plate 400. When the inner shrink plate 350 squeezes the cooling tube 310 inward, the wrapping plate 400 squeezes the cooling tube 310 inward. When the exhaust port on the wrapping plate 400 sprays air intermittently, the cooling tube 310 can be squeezed intermittently. The wrapping plate 400 will bend intermittently, fanning the nearby air and turbulently cooling the circuit board 150. When the exhaust port on the wrapping plate 400 sprays air continuously, it can turbulently cool the air between two adjacent cooling tubes 310 in two adjacent cooling groups, improving the gas cooling effect. When the exhaust port on the wrapping plate 400 sprays air away from the inner shrink plate 350, it can spray air directly towards the surface of the circuit board 150 between two adjacent cooling tubes 310 in two adjacent cooling groups.

[0162] The arc-shaped wrapping plate 400 can further restrict the shape of the cooling tube 310, wrapping it and squeezing it inward. At the same time, the exhaust port on the wrapping plate 400 intermittently sprays air, which changes angle and can fan the air flow near the circuit board 150, turbulent the air, and cool the circuit board 150. The resulting reaction force can act on the cooling tube 310, causing it to sway and drive the air flow. Continuous air spraying can drive the air flow and cool the circuit board 150. The exhaust port at the end of the wrapping plate 400 away from the inner shrink plate 350 can directly spray air onto the surface of the circuit board 150, spraying onto the surface of the circuit board 150 of two adjacent cooling tubes 310 in two adjacent cooling groups that are not in contact, directly cooling them.

[0163] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. Off-road vehicle external lighting LED lamp, comprising a fixed component and a gas supply component; The fixed component comprises a fixed shell, a mounting base, a mounting frame and a circuit board; The fixed shell is detachably arranged on one side of the mounting base; The fixed shell and the mounting base are fixed at the vehicle light of the vehicle, and the opening of the fixed shell and the mounting base faces the driving direction of the vehicle; The mounting frame is fixed in the fixed shell; The circuit board is fixed on the side of the mounting frame close to the mounting base, and the outer surface of the circuit board is coated with an insulating layer; The gas supply component is arranged in the mounting base; It is characterized in that it further comprises a cooling assembly, and the cooling assembly comprises a cooling group and an adjusting group; The cooling group comprises a cooling pipe, a memory alloy and a pressing plate; The cooling pipe has two ends, the cooling pipe is fixed on the side of the circuit board away from the mounting frame, the lower end of the cooling pipe is communicated with the gas supply component, and the upper end of the cooling pipe is communicated with the cavity on the side of the mounting frame away from the mounting base; One end of the memory alloy is fixed on the side of the circuit board away from the mounting frame, and the memory alloy is located between the two cooling pipes; the pressing plate is fixed on the end of the memory alloy away from the circuit board; The number of memory alloys and pressing plates is multiple, and they are one-to-one corresponding; the multiple memory alloys are uniformly distributed along the length direction of the cooling pipe; The cooling group has multiple and is uniformly distributed; The number of adjusting groups is consistent with the number of memory alloys, and they are one-to-one corresponding; The adjusting group comprises a through hole, a guide column, an inner shrink plate and a traction rope; The four of the through hole, the guide column, the inner shrink plate and the traction rope have two groups respectively, and are evenly divided into two groups; the two groups of the through hole, the guide column, the inner shrink plate and the traction rope are one-to-one corresponding to the two cooling pipes respectively; The guide column is a cylindrical body, the axis of the guide column is parallel to the axis of the fixed shell, the guide column is located on both sides of the memory alloy, and the axis of the guide column is located on the path closest to the memory alloy and the cooling pipe; one end of the guide column is fixed on the side of the circuit board away from the mounting frame; The pressing plate has a through hole, the axis of the through hole is on the same straight line with the axis of the guide column, and the guide column slides in the through hole; The inner shrink plate is a rectangular body, the length direction of the inner shrink plate is parallel to the length direction of the pressing plate, the inner shrink plate is located on the side of the pressing plate close to the cooling pipe, and the inner shrink plate is located on the side of the guide column away from the memory alloy; the side of the inner shrink plate close to the guide column is fixed on the pressing plate, and the connection between the inner shrink plate and the pressing plate is made of rubber; One end of the traction rope is fixed on the guide column, and the other end of the traction rope away from the guide column is fixed on the end of the inner shrink plate away from the guide column; The diameter of the through hole can allow the guide column and the traction rope to enter together; When the inner shrink plate extrudes the cooling pipe through the retraction of the memory alloy, the inner shrink plate is subjected to the tension of the traction rope, the traction rope pulls the inner shrink plate to extrude the cooling pipe, and the cooling pipe is deformed towards the side of the memory alloy column at the same time.

2. An off-road vehicle exterior lighting LED lamp as defined in claim 1, wherein, The fixed shell is a cylindrical body penetrating from top to bottom, the mounting base is a cylindrical body with an open upper end, the axes of the fixed shell and the mounting base are on the same straight line, and the axis of the fixed shell is parallel to the ground; The cavities of the fixed shell and the opening of the mounting base are both cylindrical bodies, and the axes of the two are on the same straight line; the axis of the cavity of the fixed shell is on the same straight line with the axis of the fixed shell, and the cavity of the fixed shell is communicated with the opening of the mounting base. The mounting frame is a cylinder, and the mounting frame axis is in the same straight line with the fixed shell axis, and the outer wall of the mounting frame is fixed on the inner wall of the fixed shell; The length direction of the cooling pipe is perpendicular to the ground; The pressing plate is a cuboid, and the length direction of the pressing plate is perpendicular to the ground.

3. An off-road vehicle exterior lighting LED lamp according to claim 1, wherein, The memory alloy drives the pressing plate to retract and extrude the cooling pipe after being heated; The cooling pipe is made of silica gel pipe material; The uppermost end of the cooling pipe is higher than the uppermost end of the circuit board, and the lowermost end of the cooling pipe is lower than the lowermost end of the circuit board; The upper side of the uppermost pressing plate is higher than the uppermost end of the circuit board, and the lower side of the lowermost pressing plate is lower than the lowermost end of the circuit board; The memory alloy and the cooling pipe are both fixed on the insulating layer on the surface of the circuit board.

4. An off-road vehicle exterior lighting LED lamp according to claim 1, wherein, The fixed assembly further comprises an air inlet pipe, an air outlet pipe, an air outlet, a filter screen, a lighting lamp and a lampshade; The lighting lamp is detachably arranged on the side of the mounting frame away from the circuit board, and the lighting lamp is electrically connected with the circuit board; The lampshade is fixed in the fixed shell, and the lampshade is located on the side of the lighting lamp away from the mounting frame; The end of the fixed shell away from the mounting base is provided with the air inlet pipe; The side wall of the fixed shell is provided with the air outlet pipe, and the two ends of the air outlet pipe are respectively communicated with the cavities on the two sides of the fixed shell separated by the lampshade, and the end of the air outlet pipe away from the mounting base faces the lampshade; The side wall of the mounting base is provided with the air outlet; The filter screen has three, and each of the three filter screens corresponds to the air inlet pipe, the air outlet pipe and the air outlet respectively, and the three filter screens are respectively fixed on the end of the air inlet pipe away from the mounting base, the end of the air outlet pipe away from the mounting base and the air outlet; The air supply assembly comprises a gas tank, a gas pressing rod, a communication pipe one, a communication pipe two, a filter box, a gas conveying pipe one and a shunt pipe; The gas tank is a cylinder with an open upper end, the axis of the gas tank is perpendicular to the ground, the gas tank is fixed on the open bottom side of the mounting base, the lower end of the gas pressing rod is sealingly and slidingly arranged in the gas tank, the upper end of the gas pressing rod is fixed on the inner top side of the mounting base, and the lower end of the gas pressing rod can extrude the gas in the gas tank; One end of each of the communication pipe one and the communication pipe two is respectively communicated with the inside of the gas tank, the end of the communication pipe one away from the gas tank is communicated with the air inlet pipe, the filter box is detachably arranged on the open bottom side of the mounting base, the end of the communication pipe two away from the gas tank is communicated with the input end of the filter box, and one end of the gas conveying pipe one is communicated with the output end of the filter box; The electric check valve is fixed on each of the communication pipe one, the communication pipe two and the gas conveying pipe one; The lower end of the cooling pipe is fixed with the shunt pipe, and the shunt pipe is communicated with the end of the gas conveying pipe one away from the filter box; The cooling assembly further comprises a cooling communication pipe, the length direction of the cooling communication pipe is perpendicular to the length direction of the cooling pipe, the cooling communication pipe is fixed on the side of the circuit board away from the lighting lamp, the two ends of the cooling communication pipe are respectively fixed on the side of the two cooling pipes close to each other, and the cooling communication pipe is communicated with the two cooling pipes, the cooling communication pipe has a plurality of cooling communication pipes, and the cooling communication pipes are uniformly and spacedly distributed.

5. An off-road vehicle exterior lighting LED lamp according to claim 4, wherein, The electric check valve on the communication pipe one only allows external gas to enter the gas tank, the electric check valve on the communication pipe two only allows external gas to enter the filter box, and the electric check valve on the gas conveying pipe one only allows gas to be discharged from the filter box.

6. An off-road vehicle exterior lighting LED lamp according to claim 1, wherein, The uppermost end of the inner retraction plate is consistent with the uppermost end of the pressing plate, and the lowermost end of the inner retraction plate is consistent with the lowermost end of the pressing plate; In the initial state, the traction rope is in a relaxed state, when the inner shrinkage plate contacts the cooling pipe, the traction rope is in a straight state, when the memory alloy is heated and retracted to the final state, the traction rope will not be broken.

7. An off-road vehicle exterior lighting LED lamp according to claim 6, wherein, The cooling assembly further comprises a gas injection port, a gas delivery pipe two, a support and a communication pipe three; The side of the inner shrinkage plate away from the cooling pipe is provided with the gas injection port, and the gas injection port is located at the end of the inner shrinkage plate away from the guide column. The inner shrinkage plate is provided with a gas injection pipe, one end of the gas injection pipe is in communication with the gas injection port. The support is fixed on the inner wall of the fixed shell, the support is a hollow structure, one side of the support is provided with the communication pipe three, one end of the communication pipe three away from the support is in communication with the gas delivery pipe one, and the communication pipe three is provided with an electric check valve. The number of the gas delivery pipe two is consistent with the number of the pressing plate, and they are one-to-one corresponding, one end of the gas delivery pipe two is fixed on the support, and the end of the gas delivery pipe two away from the gas delivery pipe two is fixed on the pressing plate. One end of the communication pipe three and the gas delivery pipe two is in communication with the cavity of the support respectively, the pressing plate is a hollow structure, and the gas delivery pipe two is in communication with the cavity of the pressing plate. One end of the gas injection pipe away from the gas injection port of the inner shrinkage plate is in communication with the cavity of the pressing plate through the rubber material at the connection position of the inner shrinkage plate and the pressing plate. The gas delivery pipe two is a telescopic pipe.

8. An off-road vehicle exterior lighting LED luminaire as claimed in claim 7, characterised in that, The off-road vehicle external lighting LED lamp further comprises a wrapping plate. The number of the wrapping plate is consistent with the number of the inner shrinkage plate, and they are one-to-one corresponding. The wrapping plate is arc-shaped, the side of the wrapping plate away from the axis and the end of the wrapping plate away from the inner shrinkage plate are both provided with gas exhaust ports, the gas exhaust ports are multiple and uniformly distributed. The wrapping plate is arranged at the end of the inner shrinkage plate away from the memory alloy, the side of the wrapping plate close to the cooling pipe is hinged to the inner shrinkage plate, and the wrapping plate and the memory alloy are connected through rubber. The gas exhaust ports of the wrapping plate are in communication with the gas injection pipe in the inner shrinkage plate.

9. An off-road vehicle exterior lighting LED luminaire as claimed in claim 8, wherein, The axis of the wrapping plate is parallel to the length direction of the inner shrinkage plate, the uppermost end height of the wrapping plate is consistent with the uppermost end height of the inner shrinkage plate, and the lowermost end height of the wrapping plate is consistent with the lowermost end height of the inner shrinkage plate.

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