High-beam and low-beam module efficient heat dissipation system with fan

Abstract

The high-beam and low-beam module efficient heat dissipation system comprises a radiator assembly, an LED heat source assembly, a light reflecting bowl, an outer lens and the fan, first heat dissipation fins are arranged in the heat conduction direction of the LED heat source assembly, and a plurality of first flow channels arranged side by side are formed between the adjacent first heat dissipation fins; the first heat dissipation fins are used for enabling air blown out by the fan to form convection and flow out of the first flow channels to enhance heat dissipation, an air channel structure is arranged at the end, close to the fan, of the installation base plate, and a plurality of flow deflectors are arranged between the air channel structure and the first heat dissipation fins and located on the installation base plate. After the fan blows air, wind power is gathered through the air duct structure and then evenly diffused to each first flow channel through the flow deflectors, heat generated when the LED heat source assembly works is discharged out of the first flow channels through airflow, and the heat dissipation efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of heat dissipation systems, and more specifically, to a high-efficiency heat dissipation system for a high and low beam module with a fan. Background Art

[0002] Adaptive Driving Beam (ADB) is an intelligent anti-glare high beam system. When vehicles, pedestrians and other targets appear on the road, the control system composed of sensors and drive circuits will automatically adjust the high beam lighting partitions to avoid glare to the illuminated targets while ensuring clear high beam lighting during driving. ADB modules have the advantages of intelligence and lighting enhancement in the application of vehicle lighting assemblies.

[0003] With the popularity of LED headlights, ADB modules are increasingly used in headlights. Only 20% of the input power of LEDs can be converted into light energy, and the rest of the energy is converted into heat energy. If this heat energy cannot be dissipated in time, it will cause the temperature of the LED chip to rise, thereby affecting the performance and life of the chip. Usually, the number of LEDs in the ADB module is large and the spacing is small, so the heat is too concentrated. If the heat dissipation efficiency of the system is not high, it will restrict the performance of the LED.

[0004] Existing technologies such as announcement number CN209977927U, a car lamp heat dissipation structure, and CN221324226U, an adaptive high beam lamp, have fans that only act on the cooling fins of the radiator. The strongest convection area is far away from the hottest spot, and the heat dissipation efficiency is not high; the main heat conduction direction of the radiator is too long, and the heat dissipation efficiency at the end of the cooling fins is low; the fan outlet has no duct diversion design, and the convection will spread rapidly. When the air volume and air pressure reach the bottom of the cooling fins, they are already very small, and the flow field heat dissipation efficiency is low; the structure occupies a large space, which is not conducive to styling. Summary of the invention

[0005] In view of this, in order to solve the above problems, the present invention proposes an efficient heat dissipation system for a high and low beam module with a fan. After the fan discharges air, the wind is gathered through the duct structure and then evenly diffused to each first flow channel through the guide plate. At the same time, the wind is returned to the first flow channel through the heat dissipation fins through convection in the partition area, and the heat of the LED heat source component during operation is discharged from the first flow channel through the airflow, so that the heat dissipation efficiency is high. At the same time, the heat sink component and the LED heat source component are cooled by the second heat dissipation fins extending downward; within a certain range, the first heat dissipation fin has a short length in the heat conduction direction, a large cross-sectional area, and a high heat dissipation efficiency; the duct structure and the guide plate design allow the convection to be reasonably and evenly distributed around the system heat source; the flat design of the entire module structure is conducive to the placement and shape adaptation of the module in the headlight. Compared with the existing traditional solutions, the present invention has higher heat dissipation efficiency, compact structure, small space occupancy, and better shape matching.

[0006] A high-efficiency heat dissipation system for a high- and low-beam module with a fan, comprising a radiator assembly 1, an LED heat source assembly 3, a reflective bowl 4, an outer lens 5, and a fan 2, wherein the outer lens 5 is arranged at one end of the radiator assembly 1, the fan 2 is arranged at the other end of the radiator assembly 1, the LED heat source assembly 3 is arranged at the bottom of the radiator assembly 1, the reflective bowl 4 is arranged below the LED heat source assembly 3, the radiator assembly 1 comprises a mounting substrate 11 and a plurality of first heat dissipation fins 12, the first heat dissipation fins 12 are evenly spaced and distributed at one end of the mounting substrate 11 and are located above the LED heat source assembly 3, the other end of the mounting substrate 11 extends outwardly to be connected to the outer lens 5, one end of the reflective bowl 4 is connected to the bottom of the LED heat source assembly 3, and the other end extends outwardly to be connected to the outer lens 5 connection, characterized in that: the first heat dissipation fins 12 are arranged along the heat conduction direction of the LED heat source component 3, and a plurality of first flow channels 121 arranged side by side are arranged between adjacent first heat dissipation fins 12, so that the wind blown by the fan 2 forms convection and flows out from the first flow channels 121 to enhance heat dissipation, and a duct structure 13 is arranged at one end of the mounting substrate 11 close to the fan 2, and a plurality of guide plates 14 are arranged between the duct structure 13 and the first heat dissipation fins 12 and are located on the mounting substrate 11, and after the fan 2 discharges wind, the wind force is gathered through the duct structure 13 and then evenly diffused to each first flow channel 121 through the guide plates 14, so that the heat of the LED heat source component 3 when working is discharged from the first flow channel 121 through the airflow, so that the heat dissipation efficiency is high.

[0007] In some embodiments, the plurality of guide blades 14 are scattered and arranged toward the first heat dissipation fins 12 to expand the convection range of the fan 2 .

[0008] Furthermore, the included angle between the guide plate 14 and the first heat dissipation fin 12 is 5° to 60°.

[0009] Furthermore, the spacing between the guide plates 14 is 3-6 mm.

[0010] In some embodiments, a partition area 17 is provided between the guide plate 14 and the first heat dissipation fin 12, and a plurality of reflux heat dissipation fins 15 are provided on both sides of the guide plate 14 at intervals. The wind after passing through the partition area 17 is evenly distributed to the first flow channel 121 and the reflux heat dissipation fins 15, and the wind blowing to the first flow channel 121 directly dissipates the heat of the first heat dissipation fins 12. The ends of the reflux heat dissipation fins 15 are connected to each other. Due to the Bernoulli effect, the greater the flow velocity, the smaller the pressure in the partition area 17, so that the wind forms a reflux and blows back to the first flow channel 121 at the corresponding position, so that convection is generated in the edge areas on both sides of the radiator assembly 1, thereby enhancing the convection range of the entire system and improving the heat dissipation efficiency.

[0011] Furthermore, a second flow channel 141 is formed between adjacent guide plates 14 , and wind in the second flow channel 141 is evenly distributed to the first flow channel 121 after passing through the partition area 17 .

[0012] Furthermore, the height of the first heat dissipation fin 12 is 40-50 mm, and the heat dissipation efficiency is high when the temperature difference between the top of the first heat dissipation fin 12 and the external environment is greater than 40° C. while the cross-sectional area of ​​the first heat dissipation fin 12 in the heat conduction direction remains unchanged.

[0013] In some embodiments, the air duct structure 13 and the centers of the fan 2 and the LED heat source assembly 3 are all located on the same straight line, so that the main convection areas after the fan 2 discharges air are evenly distributed on the upper and lower sides of the LED heat source assembly 3, effectively restraining the convection at the air outlet of the fan 2 from diffusing to the invalid area, and convection is concentrated to the first heat dissipation fins 12, the LED heat source assembly 3, and the reflective bowl 4, thereby improving the convection heat dissipation efficiency of the fan 2.

[0014] Furthermore, the LED heat source assembly 3 includes a PCBA board, on which LED heat sources are arranged, and the temperature of the LED heat sources decreases from the middle to both sides.

[0015] Furthermore, the reflective bowl 4 adopts a parabolic curved surface design to reduce the light loss of the focused light.

[0016] In some embodiments, a plurality of second heat dissipation fins 16 are further extended downward from the opposite side of the reflux heat dissipation fins 15 . The plurality of second heat dissipation fins 16 are evenly spaced and distributed on both sides of the fan 2 and the air duct structure 13 to increase the heat dissipation area.

[0017] Furthermore, the downwardly extending length of the second heat sink fins 16 does not exceed the bottom of the reflective bowl 4, thereby achieving a heat dissipation effect while ensuring a flat design of the overall structure of the system.

[0018] Beneficial effects of the invention: The invention proposes an efficient heat dissipation system for a high and low beam module with a fan. After the fan discharges air, the wind is gathered through the duct structure and then evenly diffused to each first flow channel through the guide plate. At the same time, the wind is returned to the first flow channel through the heat dissipation fins through convection in the partition area, and the heat of the LED heat source component during operation is discharged from the first flow channel through the airflow, so that the heat dissipation efficiency is high. At the same time, the second heat dissipation fins extending downward are used to dissipate the heat of the radiator assembly and the LED heat source assembly; within a certain range, the first heat dissipation fin has a short length in the heat conduction direction, a large cross-sectional area, and a high heat dissipation efficiency; the duct structure and the guide plate design allow the convection to be reasonably evenly distributed around the system heat source; the flattened design of the entire module structure is conducive to the placement and shape adaptation of the module in the headlight. Compared with existing traditional solutions, the invention has higher heat dissipation efficiency, compact structure, small space occupancy, and better shape matching. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an exploded view of the efficient heat dissipation system of the high and low beam modules with a fan of the present invention.

[0020] Figure 2 This is a structural diagram of the fan-less high and low beam module high-efficiency heat dissipation system of the present invention.

[0021] Figure 3 It is a partial cross-sectional structural diagram of the efficient heat dissipation system of the high and low beam modules with a fan of the present invention.

[0022] Figure 4 It is a top view of the efficient heat dissipation system of the high and low beam modules with a fan of the present invention.

[0023] Figure 5 It is a schematic diagram of the angle between the guide plate and the first heat dissipation fin of the high-efficiency heat dissipation system of the high and low beam module with a fan of the present invention.

[0024] Main component symbols

[0025] Radiator assembly 1, mounting substrate 11, first heat dissipation fins 12, first flow channel 121, duct structure 13, guide plate 14, second flow channel 141, reflux heat dissipation fins 15, second heat dissipation fins 16, partition area 17, fan 2, LED heat source assembly 3, reflective bowl 4, and outer lens 5.

[0026] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0027] like Figure 1 As shown, it is an exploded view of the high-efficiency heat dissipation system of the high and low beam module with a fan of the present invention; Figure 2 As shown, it is a structure diagram of the fan-less high and low beam module high efficiency heat dissipation system with fan of the present invention; Figure 3 As shown in FIG. 1 , it is a partial cross-sectional structural diagram of the high-efficiency heat dissipation system of the high and low beam module with a fan of the present invention; Figure 4 As shown, it is a top view of the high-efficiency heat dissipation system of the high and low beam modules with a fan of the present invention; Figure 5 , which is a schematic diagram of the angle between the guide plate and the first heat dissipation fin of the high-efficiency heat dissipation system of the high and low beam module with a fan of the present invention. Example:

[0028] A high-efficiency heat dissipation system for a high and low beam module with a fan, comprising a heat sink assembly 1, an LED heat source assembly 3, a reflective bowl 4, an outer lens 5, and a fan 2, wherein the outer lens 5 is arranged at one end of the heat sink assembly 1, the fan 2 is arranged at the other end of the heat sink assembly 1, the LED heat source assembly 3 is arranged at the bottom of the heat sink assembly 1, and the reflective bowl 4 is arranged below the LED heat source assembly 3. The heat sink assembly 1 comprises a mounting substrate 11 and a plurality of first heat dissipation fins 12, wherein the first heat dissipation fins 12 are evenly spaced and distributed at one end of the mounting substrate 11 and are located above the LED heat source assembly 3, the other end of the mounting substrate 11 extends outwardly to be connected to the outer lens 5, one end of the reflective bowl 4 is connected to the bottom of the LED heat source assembly 3, and the other end extends outwardly to be connected to the outer lens 5, so that a cavity is formed inside the heat sink assembly 1, the LED heat source assembly 3, the reflective bowl 4, and the outer lens 5, and the LED heat source assembly 3 emits a light beam to the reflective bowl 4, which is then reflected to the outer lens 5 by the reflective bowl 4 and scattered out;

[0029] The first heat dissipation fins 12 are arranged along the heat conduction direction of the LED heat source component 3, and a plurality of first flow channels 121 arranged side by side are provided between adjacent first heat dissipation fins 12, so that the wind blown out by the fan 2 forms convection and flows out from the first flow channels 121 to enhance heat dissipation. An air duct structure 13 is provided at one end of the mounting substrate 11 close to the fan 2, and a plurality of guide plates 14 are provided between the air duct structure 13 and the first heat dissipation fins 12 and are located on the mounting substrate 11. After the fan 2 discharges air, the wind force is gathered through the air duct structure 13 and then evenly diffused to each first flow channel 121 through the guide plates 14, so that the heat generated by the LED heat source component 3 when working is discharged from the first flow channel 121 through the airflow, so that the heat dissipation efficiency is high.

[0030] The plurality of guide blades 14 are scattered and arranged toward the first heat dissipation fins 12 to expand the convection range of the fan 2 .

[0031] See Table 1, which is a simulation relationship diagram of the angle between the guide plate 14 and the first heat sink fin 12 and the LED junction temperature. The angle between the guide plate 14 and the first heat sink fin 12 is α. When other factors remain unchanged, when α=5°, the LED junction temperature is 133°C; when α=25°, the LED junction temperature is 130°C; when α=45°, the LED junction temperature is 135°C; when α=60°, the LED junction temperature is 140°C. It can be seen that the heat dissipation efficiency is high when the angle is 25°C.

[0032] Table 1

[0033]

[0034] See Table 2, which is a simulation relationship diagram between the guide plate 14 spacing and the LED junction temperature. When other factors remain unchanged, when the guide plate 14 spacing is 2mm, the LED junction temperature is 135°C; when the guide plate 14 spacing is 5mm, the LED junction temperature is 130°C; when the guide plate 14 spacing is 7mm, the LED junction temperature is 140°C. It can be seen that the heat dissipation efficiency is high when the guide plate spacing is 5mm.

[0035] Table 2

[0036]

[0037] A partition area 17 is provided between the guide plate 14 and the first heat dissipation fin 12, and a plurality of reflux heat dissipation fins 15 are provided at intervals on both sides of the guide plate 14. The wind passing through the partition area 17 is evenly distributed to the first flow channel 121 and the reflux heat dissipation fins 15, and the wind blowing to the first flow channel 121 directly dissipates the heat of the first heat dissipation fins 12. The ends of the reflux heat dissipation fins 15 are connected to each other. Due to the Bernoulli effect, the greater the flow velocity in the partition area 17, the smaller the pressure, so that the wind forms a reflux and blows back to the first flow channel 121 at the corresponding position, so that convection is generated in the edge areas on both sides of the radiator assembly 1, thereby strengthening the convection range of the entire system and improving the heat dissipation efficiency.

[0038] A second flow channel 141 is formed between adjacent guide plates 14 , and wind in the second flow channel 141 is evenly distributed to the first flow channel 121 after passing through the partition area 17 .

[0039] See Table 3, which is a simulation relationship diagram between the radiator fin height, the temperature difference between the fin end and the environment, and the LED junction temperature of the high-efficiency heat dissipation system of the high and low beam module with a fan of the present invention. When the simulation environment is set at 25°C and the cross-sectional area of ​​the heat conduction direction of the first heat dissipation fin 12 remains unchanged, when the height of the first heat dissipation fin 12 is 30mm, the temperature difference between the fin end and the environment is 50°C, and the LED junction temperature is 100°C; when the height of the first heat dissipation fin 12 is 45mm, the temperature difference between the fin end and the environment is 45°C, and the LED junction temperature is 94°C; when the height of the first heat dissipation fin 12 is 60mm, the temperature difference between the fin end and the environment is 42°C, and the LED junction temperature is 92°C; it can be seen that when the temperature difference between the top of the first heat dissipation fin 12 and the external environment is greater than 40°C, the LED junction temperature continues to increase and the heat dissipation efficiency is high.

[0040] Table 3

[0041]

[0042] In some embodiments, the air duct structure 13 and the centers of the fan 2 and the LED heat source assembly 3 are all located on the same straight line, so that the main convection areas after the fan 2 discharges air are evenly distributed on the upper and lower sides of the LED heat source assembly 3, effectively restraining the convection at the air outlet of the fan 2 from diffusing to the invalid area, and convection is concentrated to the first heat dissipation fins 12, the LED heat source assembly 3, and the reflective bowl 4, thereby improving the convection heat dissipation efficiency of the fan 2.

[0043] The LED heat source assembly 3 includes a PCBA board, on which LED heat sources are arranged, and the temperature of the LED heat sources decreases from the middle to both sides.

[0044] The reflective bowl 4 adopts a parabolic curved surface design to reduce the light loss of the focusing light.

[0045] In some embodiments, a plurality of second heat dissipation fins 16 are further extended downward from the opposite side of the reflux heat dissipation fins 15 . The plurality of second heat dissipation fins 16 are evenly spaced and distributed on both sides of the fan 2 and the air duct structure 13 to increase the heat dissipation area.

[0046] The downwardly extending length of the second heat dissipation fins 16 does not exceed the bottom of the reflective bowl 4 , which achieves a heat dissipation effect while ensuring a flat design of the overall structure of the system.

[0047] The working principle of the present invention is as follows: the bottom end of the first heat dissipation fin 12 is close to the heat source and approaches the temperature of the heat source. The higher the height of the first heat dissipation fin 12 is within a certain range, the better the heat dissipation effect is. However, the smaller the temperature difference between the end and the environment is, the lower the heat dissipation efficiency is. Therefore, when the height of the first heat dissipation fin 12 exceeds a certain threshold, the heat dissipation efficiency of the radiator is almost not improved. However, since the cross-sectional area of ​​the heat conduction direction of the first heat dissipation fin 12 is larger within a certain range, the better the heat dissipation effect is, therefore, when the cross-sectional area exceeds a certain threshold, the heat dissipation efficiency of the radiator is almost not improved.

[0048] Therefore, in the current heat dissipation system, under the condition of the same heat dissipation area, the flattened design increases the cross-sectional area in the heat conduction direction within the effective range, reduces the heat conduction distance, greatly improves the heat dissipation efficiency, and is beneficial to the placement and shape adaptation of the module in the headlight.

[0049] Beneficial effects of the invention: The invention proposes an efficient heat dissipation system for a high and low beam module with a fan. After the fan discharges air, the wind is gathered through the duct structure and then evenly diffused to each first flow channel through the guide plate. At the same time, the wind is returned to the first flow channel through the heat dissipation fins through convection in the partition area, and the heat of the LED heat source component during operation is discharged from the first flow channel through the airflow, so that the heat dissipation efficiency is high. At the same time, the second heat dissipation fins extending downward are used to dissipate the heat of the radiator assembly and the LED heat source assembly; within a certain range, the first heat dissipation fin has a short length in the heat conduction direction, a large cross-sectional area, and a high heat dissipation efficiency; the duct structure and the guide plate design allow the convection to be reasonably evenly distributed around the system heat source; the flattened design of the entire module structure is conducive to the placement and shape adaptation of the module in the headlight. Compared with existing traditional solutions, the invention has higher heat dissipation efficiency, compact structure, small space occupancy, and better shape matching.

[0050] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An efficient heat dissipation system for a high and low beam module with a fan, comprising a heat sink assembly (1), an LED heat source assembly (3), a reflective bowl (4), an outer lens (5), and a fan (2), wherein the outer lens (5) is arranged at one end of the heat sink assembly (1), the fan (2) is arranged at the other end of the heat sink assembly (1), the LED heat source assembly (3) is arranged at the bottom of the heat sink assembly (1), the reflective bowl (4) is arranged below the LED heat source assembly (3), the heat sink assembly (1) comprises a mounting substrate (11) and a plurality of first heat dissipation fins (12), the first heat dissipation fins (12) are evenly spaced and distributed at one end of the mounting substrate (11) and are located above the LED heat source assembly (3), the other end of the mounting substrate (11) extends outwardly to be connected to the outer lens (5), one end of the reflective bowl (4) is connected to the bottom of the LED heat source assembly (3), and the other end extends outwardly to be connected to the outer lens (5), characterized in that: The first heat dissipation fins (12) are arranged along the heat conduction direction of the LED heat source assembly (3); a plurality of first flow channels (121) arranged side by side are arranged between adjacent first heat dissipation fins (12); an air duct structure (13) is provided at one end of the mounting substrate (11) close to the fan (2); a plurality of guide plates (14) are provided between the air duct structure (13) and the first heat dissipation fins (12) and are located on the mounting substrate (11); after the fan (2) discharges air, the wind force is gathered by the air duct structure (13) and then evenly diffused to each first flow channel (121) through the guide plates (14), so that the heat generated by the LED heat source assembly (3) during operation is discharged from the first flow channel (121) through the airflow.

2. The high-efficiency heat dissipation system for high and low beam modules with fans as claimed in claim 1, characterized in that: The plurality of guide plates (14) are arranged in a scattered manner towards the first heat dissipation fins (12).

3. The high-efficiency heat dissipation system for high and low beam modules with fans as claimed in claim 1, characterized in that: The included angle between the guide plate (14) and the first heat dissipation fin (12) is 5° to 60°.

4. The high-efficiency heat dissipation system for high and low beam modules with fans as claimed in claim 1, characterized in that: The spacing between the guide plates (14) is 3 to 6 mm.

5. The high-efficiency heat dissipation system of the high and low beam module with fan as claimed in claim 1, characterized in that: A partition area (17) is provided between the guide plate (14) and the first heat sink fin (12); a plurality of spaced return heat sink fins (15) are provided on both sides of the guide plate (14); the wind passing through the partition area (17) is evenly distributed toward the first flow channel (121) and the return heat sink fins (15); the wind blowing toward the first flow channel (121) directly dissipates heat for the first heat sink fins (12); the ends of the return heat sink fins (15) are connected to each other; due to the Bernoulli effect, the greater the flow velocity in the partition area (17), the smaller the pressure, so that the wind forms a return flow and blows back toward the first flow channel (121) at the corresponding position, so that convection is generated in the edge areas on both sides of the radiator assembly (1).

6. The high-efficiency heat dissipation system of the high and low beam module with fan as claimed in claim 5, characterized in that: A second flow channel (141) is formed between adjacent guide plates (14), and wind in the second flow channel (141) is evenly distributed to the first flow channel (121) after passing through the partition area (17).

7. The high-efficiency heat dissipation system of the high and low beam module with fan as claimed in claim 1, characterized in that: The height of the first heat dissipation fin (12) is 40-50 mm, and when the cross-sectional area of ​​the first heat dissipation fin (12) in the heat conduction direction remains unchanged, the heat dissipation efficiency is high when the temperature difference between the top of the first heat dissipation fin (12) and the external environment is greater than 40°C.

8. The high-efficiency heat dissipation system of the high and low beam module with fan as claimed in claim 1, characterized in that: The air duct structure (13) and the centers of the fan (2) and the LED heat source assembly (3) are all located on the same straight line, so that the main convection areas after the fan (2) discharges air are evenly distributed on the upper and lower sides of the LED heat source assembly (3), effectively restricting the convection at the air outlet of the fan (2) from diffusing to the ineffective area, and concentrating the convection to blow toward the first heat sink fins (12), the LED heat source assembly (3), and the reflective bowl (4).

9. The high-efficiency heat dissipation system of the high and low beam module with fan as claimed in claim 1, characterized in that: The LED heat source assembly (3) comprises a PCBA board, on which LED heat sources are arranged, and the temperature of the LED heat sources decreases from the middle to both sides.

10. The high-efficiency heat dissipation system of the high and low beam module with fan as claimed in claim 5, characterized in that: A plurality of second heat dissipation fins (16) are also provided on the opposite side of the return heat dissipation fins (15) extending downwards, and the plurality of second heat dissipation fins (16) are evenly spaced and distributed on both sides of the fan (2) and the air duct structure (13).

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