Heat dissipation device, vehicle lamp and vehicle

Abstract

The utility model discloses a heat dissipation device, a vehicle lamp and a vehicle, the heat dissipation device is used for the vehicle lamp of the vehicle, and the heat dissipation device comprises a first pipeline, a valve, a second pipeline and a third pipeline; the first pipeline is provided with an air inlet and connected with a circuit board of the automobile lamp. The valve is connected with one end of the first pipeline away from the air inlet; the second pipeline is connected with the valve and is suitable for communicating with the internal environment of the vehicle; the third pipeline is connected with the valve and is suitable for communicating with the external environment of the vehicle; the valve is suitable for switching the first pipeline to communicate with the second pipeline or the third pipeline. The heat dissipation device can selectively discharge the cooled fluid into the vehicle, and the influence of the fluid on the internal environment of the vehicle can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a heat dissipation device, a vehicle lamp and a vehicle. Background Art

[0002] At present, the industry's automotive lamps basically use fully enclosed or one-way breathable structures. This structure can effectively prevent water or other substances that may harm the lamp beads from entering the lamp chamber, greatly protecting the safety of the lamp beads. At the same time, it also determines that the heat dissipation of the lamp beads can only be carried out through conduction and heat exchange in other structures in the lamp chamber. When the headlights are turned on for a long time, the heat dissipation efficiency of the lamp beads will also slow down as the temperature of the surrounding structures rises. The temperature of the lamp beads themselves will continue to rise due to the accumulated heat. If the heat is not transferred out in time, it may cause damage to the lamp beads. Therefore, effective heat dissipation measures for car lights are a very critical part of car light design.

[0003] The prior art controls the exhaust of the heat dissipation device by means of a valve, but only one exhaust port is provided, the fluid is not differentiated, and there is no selectivity. After completing the cooling function, the fluid enters the interior of the vehicle and may affect the environment inside the vehicle. Utility Model Content

[0004] The utility model aims to provide a heat dissipation device, a vehicle lamp and a vehicle, so as to solve the problem that the fluid discharged from the heat dissipation device after completing the cooling function affects the internal environment of the vehicle.

[0005] In order to achieve the purpose of the utility model, the utility model provides the following technical solutions:

[0006] In a first aspect, the utility model provides a heat dissipation device for a vehicle lamp, comprising:

[0007] a first pipe, the first pipe having an air inlet, the first pipe being connected to a circuit board of the vehicle lamp;

[0008] a valve connected to an end of the first pipeline away from the air inlet;

[0009] a second conduit connected to the valve, the second conduit being adapted to communicate with an internal environment of the vehicle;

[0010] a third conduit connected to the valve, the third conduit being adapted to communicate with an external environment of the vehicle;

[0011] The valve is suitable for switching the first pipeline to communicate with the second pipeline or the third pipeline.

[0012] In one embodiment, the first pipeline includes a first section and a second section, the first section has the air inlet, one end of the second section is connected to an end of the first section away from the air inlet, the other end of the second section is connected to the valve, the circuit board is connected to the second section, the first section is used for shock absorption, and the second section is used for heat exchange.

[0013] In one embodiment, the wall thickness of the first section is greater than the wall thickness of the second section.

[0014] In one embodiment, the outer diameter of the first section is equal to the outer diameter of the second section, and the inner diameter of the first section is smaller than the inner diameter of the second section.

[0015] In one embodiment, the second section includes a first subsection, a second subsection and a third subsection connected in sequence, an end of the first subsection away from the second subsection is connected to the first section, the valve is arranged at an end of the third subsection away from the second subsection, and the circuit board of the headlight is connected to the second subsection;

[0016] The first sub-segment and the second sub-segment have an included angle A, which satisfies: 60°≤A≤120°.

[0017] In one embodiment, the heat dissipation device further includes a controller and a sensor, wherein the sensor is adapted to detect the humidity of the fluid in the first pipe, the controller is electrically connected to the sensor and the valve, and the controller is adapted to control the valve according to the humidity detected by the sensor;

[0018] When the humidity of the fluid in the first pipe is less than a preset humidity, the controller controls the valve to connect the first pipe with the second pipe;

[0019] When the humidity of the fluid in the first pipeline is greater than or equal to a preset humidity, the controller controls the valve to connect the first pipeline with the third pipeline.

[0020] In one embodiment, the heat dissipation device further includes a fan, which is connected to the first pipeline and is used to increase the gas flow rate in the first pipeline.

[0021] In a second aspect, the utility model provides a vehicle lamp, comprising:

[0022] Light-emitting parts;

[0023] Circuit boards;

[0024] As in any one of the various embodiments of the first aspect, the heat dissipation device, the circuit board is connected to the heat dissipation device, and the light-emitting component is arranged on the circuit board.

[0025] In one embodiment, the vehicle lamp further comprises a grille, and the grille is suitable for covering the air inlet.

[0026] In a third aspect, the utility model provides a vehicle, comprising a vehicle lamp as described in any one of the various embodiments of the second aspect.

[0027] The heat dissipation device of the utility model realizes two heat transfer modes of convection and conduction by arranging pipes, and further arranges valves to realize the connection between the first pipe and the second pipe or the third pipe. After the first pipe and the second pipe are connected, the fluid outside the vehicle flows through the pipes driven by the pressure difference to take away the heat to cool the circuit board of the headlight, and the fluid after cooling the circuit board is discharged to the inside of the vehicle, and can also cool the remaining parts of the vehicle. After the first pipe and the third pipe are connected, the fluid after cooling the circuit board is discharged to the outside of the vehicle, and the valve can switch different fluid paths, so that the fluid after completing the cooling effect can be selectively discharged to the inside of the vehicle, which can avoid the influence of the fluid on the internal environment of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 is a side view of a vehicle light of an embodiment;

[0030] Figure 2 is a side view of a heat dissipation device according to an embodiment.

[0031] Description of reference numerals:

[0032] 100-heat dissipation device, 10-first pipeline, 11-first section, 12-second section, 121-first subsection, 122-second subsection, 123-third subsection, 13-air inlet, 20-valve, 30-second pipeline, 40-third pipeline, 50-fan, 200-light-emitting part, 300-circuit board, 400-lamp cover, 500-mask, X-first direction, Y-second direction. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0035] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more related listed items.

[0036] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0037] For reference Figure 1 and Figure 2 The utility model provides a heat dissipation device 100 for a vehicle lamp, and the heat dissipation device 100 includes a first pipe 10, a valve 20, a second pipe 30 and a third pipe 40. The first pipe 10 has an air inlet 13, and the first pipe 10 is connected to a circuit board 300 of the lamp. The valve 20 is connected to an end of the first pipe 10 away from the air inlet. The second pipe 30 is connected to the valve 20, and the second pipe 30 is suitable for communicating with the internal environment of the vehicle. The third pipe 40 is connected to the valve 20, and the third pipe 40 is suitable for communicating with the external environment of the vehicle. The valve 20 is suitable for switching the first pipe 10 to communicate with the second pipe 30 or the third pipe 40.

[0038] The materials of the first pipe 10, the second pipe 30 and the third pipe 40 can be copper alloy pipes, stainless steel pipes, aluminum alloy pipes, carbon steel pipes, etc., without limitation, so that the pipes of the heat dissipation device 100 have good thermal conductivity. Specifically, the pipe material of this embodiment is an aluminum metal pipe with a thermal conductivity of 217.7 W / mK, which can meet the heat exchange requirements of the headlights and is reasonably priced.

[0039] The shape of the air inlet 13 can be circular, rectangular, elliptical, etc., without limitation.

[0040] The valve 20 may be a solenoid valve, that is, the valve 20 in the cooling pipeline is opened and closed by electromagnetic force. Specifically, it may be a direct-acting solenoid valve, a step-by-step direct-acting solenoid valve, a pilot-operated solenoid valve, etc., without limitation.

[0041] The valve 20 includes a valve body, a valve core, a spring, etc. Specifically, the valve 20 of this embodiment is a three-way valve.

[0042] The valve 20 is usually made of pressure-resistant and corrosion-resistant materials, such as brass, cast steel, cast iron and stainless steel, to ensure its normal operation and extend its service life.

[0043] Optionally, the internal environment of the vehicle can be the passenger space inside the vehicle, or other spaces inside the vehicle with a temperature difference from the heat dissipation device 100, such as the front cabin of the vehicle, etc., without limitation. The external space of the vehicle is the external environment of the entire vehicle.

[0044] The heat dissipation device 100 of the utility model realizes two heat transfer modes, namely convection and conduction, by setting up pipes, and further sets up a valve 20 to realize the connection between the first pipe 10 and the second pipe 30 or the third pipe 40. After the first pipe 10 and the second pipe 30 are connected, the fluid outside the vehicle flows through the pipe driven by the pressure difference to take away the heat to cool the circuit board 300 of the headlight, and the fluid after cooling the circuit board 300 is discharged to the inside of the vehicle, and can also cool the remaining parts of the vehicle. After the first pipe 10 and the third pipe 40 are connected, the fluid after cooling the circuit board 300 is discharged to the outside of the vehicle. The valve 20 can switch different fluid paths, so that the fluid after cooling can be selectively discharged to the inside of the vehicle, which can avoid the influence of the fluid on the internal environment of the vehicle, such as avoiding the fluid discharged from the heat dissipation device 100 from corroding the electronic components of the vehicle.

[0045] The existing heat dissipation device 100 generally adopts fin type or fan type. The heat dissipation device 100 of the utility model adopts pipes to achieve convection heat dissipation. The overall size of the pipes of the heat dissipation device 100 is small. Compared with the existing fin type heat dissipation method, the space required for arranging the fins can be saved, and it is estimated that 70% of the space can be saved. Compared with the fan type heat dissipation method, the heat dissipation device 100 of the utility model does not need to be provided with a fan, which reduces the cost of the heat dissipation device 100 and the corresponding car lights, and also reduces noise.

[0046] For reference Figure 1 and Figure 2 In one embodiment, the first pipeline 10 includes a first section 11 and a second section 12, the first section 11 has an air inlet, one end of the second section 12 is connected to an end of the first section 11 away from the air inlet, the other end of the second section 12 is connected to the valve 20, the circuit board 300 is connected to the second section 12, the first section 11 is used for shock absorption, and the second section 12 is used for heat exchange.

[0047] The first section 11 extends from the air inlet to the corresponding position of the circuit board 300. The first section 11 is suitable for bearing the pressure of the fluid entering the heat dissipation pipe. The second section 12 is connected to the first section 11. The damped gas enters the second section 12 to exchange heat with the high-temperature gas caused by the operation of the car lights.

[0048] For reference Figure 1 In one embodiment, the wall thickness of the first section 11 is greater than the wall thickness of the second section 12.

[0049] The wall thickness of the first section 11 is 0.2 mm-0.4 mm, and the thickness of the second section 12 is 0.1 mm-0.2 mm.

[0050] Specifically, the wall thickness of the first section 11 is 0.2 mm, and the wall thickness of the second section 12 is 0.1 mm.

[0051] The first section 11 is subjected to a greater pressure. To prevent the vibration of the pipeline from damaging the structure of the lamp, the wall thickness of the first section 11 is greater than that of the second section 12. As the wall thickness of the first section 11 is reduced, the flow rate of the fluid in the pipeline will decrease due to the increase in the cross-sectional area, making the heat transfer process more complete and the heat transfer amount guaranteed.

[0052] For reference Figure 1 In one embodiment, the outer diameter of the first section 11 is equal to the outer diameter of the second section 12 , and the inner diameter of the first section 11 is smaller than the inner diameter of the second section 12 .

[0053] The outer diameter of the first section 11 is equal to the outer diameter of the heat exchange diameter, so that the outer wall surface of the first pipe 10 of the heat dissipation device 100 is smooth as a whole, reducing the generation of burrs and the like.

[0054] The outer diameter of the first section 11 is equal to the outer diameter of the second section 12, and the inner diameter of the first section 11 is smaller than the outer diameter of the second section 12, so that the wall thickness of the first section 11 is greater than the wall thickness of the second section 12. The pressure that the first section 11 can withstand is increased, which can prevent the vibration of the pipeline from damaging the structure of the car light. At the same time, the reduction in the wall thickness of the second section 12 is conducive to reducing the flow rate of the fluid in the second section 12, so that the fluid in the second section 12 can fully exchange heat with the circuit board 300, thereby improving the heat dissipation efficiency of the heat dissipation device 100.

[0055] For reference Figure 1 and Figure 2 In one embodiment, the second section 12 includes a first subsection 121, a second subsection 122, and a third subsection 123 connected in sequence, an end of the first subsection 121 away from the second subsection 122 is connected to the first section 11, the valve 20 is arranged at an end of the third subsection 123 away from the second subsection 122, and the circuit board 300 of the headlight is connected to the second subsection 122. The first subsection 121 and the second subsection 122 have an angle A, which satisfies: 60°≤A≤120°.

[0056] The first sub-segment 121 extends along a first direction X, and the second sub-segment 122 extends along a second direction Y. The first direction X and the second direction Y also have an angle A, which satisfies: 60°≤A≤120°.

[0057] Optionally, A is 60°, 75°, 90°, 110°, 120°, etc., without limitation.

[0058] Optionally, the third sub-segment 123 and the second sub-segment 122 also have an included angle therebetween. The third sub-segment 123 may extend along the first direction X, and the third sub-segment 123 may also have an included angle with the first direction X.

[0059] The connection between the first sub-segment 121, the second sub-segment 122 and the third sub-segment 123 can be processed into a smooth transition to facilitate the flow of the fluid.

[0060] The first segment 11 also extends along the first direction X and is connected to the first sub-segment 121 .

[0061] The first sub-segment 121, the third sub-segment 123 and the second sub-segment 122 are directly arranged with an angle, so that the second segment 12 is bent as a whole. On the one hand, the flow distance of the fluid in the second segment 12 is increased, so that the fluid can fully contact the heated circuit board 300, and the cooling effect is good. On the other hand, the bent second segment 12 is easy to fit the circuit board 300.

[0062] In one embodiment, the heat dissipation device 100 further includes a controller and a sensor, the sensor is adapted to detect the humidity of the fluid in the first pipe 10, the controller is electrically connected to the sensor and the valve 20, and the controller is adapted to control the valve 20 according to the humidity detected by the sensor. When the humidity of the fluid in the first pipe 10 is less than a preset humidity, the controller controls the valve 20 to connect the first pipe 10 with the second pipe 30. When the humidity of the fluid in the first pipe 10 is greater than or equal to the preset humidity, the controller controls the valve 20 to connect the first pipe 10 with the third pipe 40.

[0063] The sensor is a temperature and humidity sensor, which may be a resistive temperature and humidity sensor, a capacitive temperature and humidity sensor, a surface acoustic wave temperature and humidity sensor, an optical temperature and humidity sensor, etc., without limitation.

[0064] The controller can be an electronic circuit board, a chip, etc. without limitation.

[0065] The preset humidity is 65%-75%. Specifically, the preset humidity is 65%, 68%, 70%, 72%, 75%, etc. without limitation.

[0066] Specifically, the preset humidity of the heat dissipation device 100 of one embodiment of the utility model is 70%; when the sensor detects that the humidity of the fluid in the first pipe 10 is less than 70%, the heat dissipation device 100 works in a dry environment, and the controller controls the valve 20 to connect the first pipe 10 with the third pipe 40, and the fluid after cooling the headlights is directly discharged to the internal environment of the vehicle, such as the front cabin of the vehicle. After cooling the headlights, the fluid can continue to cool other parts in the front cabin, and the other parts can be an engine, etc.; when the sensor detects that the humidity of the fluid in the first pipe 10 is greater than or equal to 70%, the heat dissipation device 100 works in a humid environment, and the controller controls the valve 20 to connect the first pipe 10 with the third pipe 40, and the fluid after cooling the headlights is directly discharged to the external environment of the vehicle, avoiding corrosion and damage to other components such as electronic components.

[0067] The control valve 20 determines the connection between the first pipe 10 and the second pipe 30 or the third pipe 40 according to the humidity of the fluid in the first pipe 10, distinguishes the fluid with high humidity, and prevents the over-humidified fluid from being discharged into the interior of the vehicle to avoid corrosion of other electronic components in the vehicle.

[0068] For reference Figure 1 In one embodiment, the heat dissipation device 100 further includes a fan 50 , which is connected to the first pipeline 10 and is used to increase the gas flow rate in the first pipeline 10 .

[0069] The fan 50 can be a horizontal axis wind turbine or a vertical axis wind turbine according to the connection mode with the first pipeline 10. The fan 50 has a fan rotor axis whose installation position has an angle of no more than 15° with the horizontal plane.

[0070] The fan 50 may be single-blade, double-blade, three-blade, four-blade, multi-blade, etc., depending on the number of blades of the fan 50, without limitation.

[0071] The fan 50 may be propeller-type, H-type, S-type, etc. according to the form of the blades, without limitation.

[0072] The power of the fan 50 may be 1-10 kilowatts.

[0073] The wind turbine 50 includes a wind rotor, a generator, a rotating body, a speed regulating mechanism, a direction adjusting mechanism, a brake mechanism and a tower. The wind rotor includes 2 to 3 blades, which are components for converting wind energy into mechanical energy. The generator can be a permanent magnet AC generator.

[0074] The fluid flow rate in the first pipe 10 is jointly determined by the inlet and outlet pressure difference and the temperature of the heat exchange area, and the pressure difference accounts for a larger proportion in most working conditions. When the speed of the vehicle is low or stopped, the fluid flow rate in the pipe of the heat sink 100 is driven only by the temperature field, and the flow rate will be greatly reduced. When the flow rate is low, intense heat exchange occurs only at the second sub-segment 122 of the second section 12 connected to the circuit board 300, and then the subsequent flow quickly heats up, and the temperature difference between the pipe wall of the pipe of the heat sink 100 is negligible, and the heat exchange amount is almost zero. In order to solve the problem of low heat exchange efficiency under the working conditions of low vehicle speed or stop, a fan 50 is set at the air inlet of the first pipe 10 to ensure that the fluid flow rate in the first pipe 10 and the second pipe 30 is large enough. Natural convection is combined with forced convection provided by the fan 50. When the pressure difference is not enough to support the fluid flow to take away enough heat, the fan 50 works and does not need to be turned on for a long time.

[0075] For reference Figure 1 and Figure 2 The utility model provides a vehicle lamp, including a light-emitting element 200, a circuit board 300, and a heat dissipation device 100 as described in any one of the aforementioned various embodiments, wherein the circuit board 300 is connected to the heat dissipation device 100, and the light-emitting element 200 is arranged on the circuit board 300.

[0076] The light emitting element 200 may be an LED, an incandescent bulb, a halogen bulb, a fluorescent lamp, a high intensity discharge lamp (HID lamp), etc., without limitation.

[0077] The circuit board 300 can be a single-sided board, a double-sided board, a rigid circuit board, a flexible circuit board (FPC), etc., without limitation.

[0078] The circuit board 300 is connected to the second sub-segment 122 of the second segment 12, which can be directly connected or indirectly connected without limitation. Specifically, when the circuit board 300 is directly connected and closely attached to the second sub-segment 122, the connection method can be screw connection, welding, bonding, etc.; when the circuit board 300 is indirectly connected to the second sub-segment 122, the headlight further includes a fastener, the fastener is closely attached to the second sub-segment 122, the circuit board 300 is directly connected to the fastener, and the connection method between the circuit board 300 and the fastener can be screw connection, welding, bonding, etc. without limitation, reducing the distance between the circuit board 300 and the second sub-segment 122, and transferring heat between the tube wall of the second sub-segment 122 and the circuit board 300 through heat conduction as much as possible.

[0079] The vehicle lamp further includes a lampshade 400 , which covers the light-emitting element 200 . The lampshade 400 may be a glass lampshade, a polycarbonate (PC) lampshade, an acrylic lampshade, a plastic lampshade, a polyvinyl chloride (PVC) lampshade, etc., without limitation.

[0080] The headlight further includes a mask 500, which is connected to the first pipe 10, and the air inlet penetrates the mask 500. The mask 500 is arranged opposite to the circuit board 300. The mask 500 is used to protect the light emitting element 200, prevent the light from diverging, make the light better gathered, and prevent the surrounding scattered light from entering the interior of the headlight, so as to ensure the brightness and lighting effect of the light emitting element 200. At the same time, it can also prevent the other driver from being dazzled by the excessive light, thereby improving driving safety. The material of the mask 500 can be high-grade polycarbonate (PC resin).

[0081] In one embodiment, the vehicle lamp further comprises a grille, and the grille is suitable for covering the air inlet.

[0082] The grille is a structure of parallel bars arranged at regular intervals, and the material can be metal, plastic or other materials. The grille has a plurality of grille bars, and the extension direction of the grille bars changes to form a square, diamond or other pattern.

[0083] The material of the grille can be metal, plastic and concrete. Depending on the shape and structure of the grille bars, the grille can be a flat grille, a twisted grille and a resin grille, etc. The grille can be a grab grille, a circulating grille, a curved grille, a rotary grille, a drum grille and a stepped grille, etc., without limitation.

[0084] Optionally, the grille of the present invention is provided on the headlight itself, which is different from the front grille of existing vehicles. Therefore, the headlight of the present invention can be applied to gasoline vehicles, hybrid vehicles, and pure electric vehicles without limitation.

[0085] The grille is used to control the absence of larger particles in the air or liquid entering the first pipe 10, and the air inlet and the grille work together to make the first pipe 10 a normally closed one-way channel, and the fluid can only enter from the front direction of the vehicle.

[0086] The utility model provides a vehicle, including a headlight as described in any of the above various embodiments. The heat dissipation device 100 of the utility model uses natural convection to dissipate heat for the headlight, so it can be used in any place on the vehicle where there may be a pressure difference. Specifically, the headlight can be a front cabin headlight or a front interior headlight, and the corresponding second pipe 30 is connected to the vehicle's front cabin and the vehicle's front interior environment, respectively, which expands the application scope of the heat dissipation device 100.

[0087] The heat dissipation device 100 of the utility model realizes two heat transfer modes, namely convection and conduction, by setting up pipes, and further sets up a valve 20 to realize the connection between the first pipe 10 and the second pipe 30 or the third pipe 40. After the first pipe 10 and the second pipe 30 are connected, the fluid outside the vehicle flows through the pipe driven by the pressure difference to take away the heat to cool the circuit board 300 of the headlight, and the fluid after cooling the circuit board 300 is discharged to the inside of the vehicle, and can also cool the remaining parts of the vehicle. After the first pipe 10 and the third pipe 40 are connected, the fluid after cooling the circuit board 300 is discharged to the outside of the vehicle. The valve 20 can switch different fluid paths, so that the fluid after the cooling effect can be selectively discharged to the inside of the vehicle, which can avoid the influence of the fluid on the internal environment of the vehicle, such as avoiding the over-humid fluid discharged from the heat dissipation device 100 from corroding the electronic components of the vehicle.

[0088] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0089] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A heat dissipation device for a vehicle lamp, characterized in that: include: a first pipe, the first pipe having an air inlet, the first pipe being connected to a circuit board of the vehicle lamp; a valve connected to an end of the first pipeline away from the air inlet; a second conduit connected to the valve, the second conduit being adapted to communicate with an internal environment of the vehicle; a third conduit connected to the valve, the third conduit being adapted to communicate with an external environment of the vehicle; The valve is suitable for switching the first pipeline to communicate with the second pipeline or the third pipeline.

2. The heat dissipation device according to claim 1, characterized in that: The first pipeline includes a first section and a second section, the first section has the air inlet, one end of the second section is connected to an end of the first section away from the air inlet, the other end of the second section is connected to the valve, the circuit board is connected to the second section, the first section is used for shock absorption, and the second section is used for heat exchange.

3. The heat dissipation device according to claim 2, characterized in that: The wall thickness of the first section is greater than the wall thickness of the second section.

4. The heat dissipation device according to claim 3, characterized in that: The outer diameter of the first section is equal to the outer diameter of the second section, and the inner diameter of the first section is smaller than the inner diameter of the second section.

5. The heat dissipation device according to claim 2, characterized in that: The second section includes a first subsection, a second subsection and a third subsection connected in sequence, an end of the first subsection away from the second subsection is connected to the first section, the valve is arranged at an end of the third subsection away from the second subsection, and the circuit board of the headlight is connected to the second subsection; The first sub-segment and the second sub-segment have an included angle A, which satisfies: 60°≤A≤120°.

6. The heat dissipation device according to claim 1, characterized in that: The heat dissipation device further comprises a controller and a sensor, wherein the sensor is adapted to detect the humidity of the fluid in the first pipe, the controller is electrically connected to the sensor and the valve, and the controller is adapted to control the valve according to the humidity detected by the sensor; When the humidity of the fluid in the first pipe is less than a preset humidity, the controller controls the valve to connect the first pipe with the second pipe; When the humidity of the fluid in the first pipeline is greater than or equal to a preset humidity, the controller controls the valve to connect the first pipeline with the third pipeline.

7. The heat dissipation device according to claim 1, characterized in that: The heat dissipation device also includes a fan, which is connected to the first pipeline and is used to increase the gas flow rate in the first pipeline.

8. A vehicle lamp, characterized in that: include: Light-emitting parts; Circuit boards; According to any one of claims 1 to 7, the circuit board is connected to the heat dissipation device, and the light-emitting element is arranged on the circuit board.

9. The vehicle lamp according to claim 8, characterized in that: The vehicle lamp further comprises a grille, and the grille is suitable for covering the air inlet.

10. A vehicle, characterized in that: Comprising the vehicle lamp as described in any one of claims 8 or 9.

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