LED automobile headlamp with ultra-low thermal resistance channel
By using the temperature uniform plate and directional air duct design in LED car headlights, the problem of thermal conductivity bottleneck of copper substrates is solved, efficient heat dissipation of LEDs is achieved, and driving safety and service life are improved.
Patent Information
- Application Number
- CN202420961254.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-05-07
AI Technical Summary
When the existing LED car headlights are at high driving power, due to the thermal conductivity bottleneck of the copper substrate, the LED temperature is too high, which can easily lead to over-temperature failure and affect driving safety.
With a design including a temperature equalizer, a radiator and a fan, the heat is quickly transferred to the surrounding air through a directional air duct, reducing thermal resistance and ensuring that the LEDs operate at the right temperature.
It effectively reduces thermal resistance on the thermal conductivity path, extends the service life of LEDs, and improves driving safety.
Smart Images
Figure CN222186691U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of vehicle lamps, and specifically relates to an LED vehicle headlamp with an ultra-low thermal resistance channel. Background Art
[0002] In the prior art, LED car headlights are mounted on a copper substrate, and the circuit laid on the copper substrate is used to make electrical connections with the LED, the connecting board, and the power cord. At the same time, heat is also transferred through the copper substrate. The heat generated by the LED is conducted to the radiator and the heat sink through the copper substrate, and then the forced convection generated by the fan dissipates the heat to the surrounding environment.
[0003] Since the thermal conductivity of copper is a constant, when a large driving power is applied to the LED, the heat flux density flowing through the copper substrate increases dramatically, and the thermal resistance also increases accordingly, which will form a thermal conductivity bottleneck. When the heat at the LED cannot be discharged in time, it will accumulate, causing the temperature at the LED to be too high, which can easily cause the LED to overheat and fail, posing a risk to driving safety. Utility Model Content
[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides an LED automobile headlight with an ultra-low thermal resistance channel, which is used to solve the problem of LED overheating caused by temperature concentration at the LED in the prior art, and is used to improve driving safety.
[0005] The technical solutions adopted in this application are as follows:
[0006] This solution provides an LED automobile headlight with an ultra-low thermal resistance channel, comprising a mounting shell, a power line, a first LED lamp and a second LED lamp, and a heat sink disposed on the mounting shell, wherein the heat sink comprises a temperature averaging plate, the first LED lamp and the second LED lamp are fixedly disposed on both sides of the temperature averaging plate, and the mounting shell is provided with light-transmitting holes on both sides of the first LED lamp and the second LED lamp;
[0007] A first PCB board for controlling the first LED lamp is disposed on one side of the temperature homogenizing plate, and a second PCB board for controlling the second LED lamp is disposed on the other side of the temperature homogenizing plate;
[0008] One end of the mounting shell is opened, and a first radiator and a second radiator are arranged inside the mounting shell relative to the outside of the temperature homogenizing plate, a fan is arranged between the first radiator and the second radiator, and a fan cover is arranged at the opening of the mounting shell, and a directional air duct is formed between the fan and the fan cover, which is used to quickly transfer the heat on the first radiator and the second radiator to the surrounding air, so that the heat at the first LED lamp and the second LED lamp will not be accumulated, effectively reducing the thermal resistance on the heat conduction path, ensuring that the first LED lamp and the second LED lamp work at a suitable temperature, effectively ensuring the service life, and improving driving safety.
[0009] Preferably, a mounting ring and a sealing ring are provided at the other end of the mounting shell.
[0010] As a preferred solution, the temperature averaging plate adopts a VC temperature averaging plate, which has a better temperature averaging effect and faster heat diffusion.
[0011] Preferably, the first LED lamp and the second LED lamp are fixed to the VC temperature averaging board by soldering, and the first PCB board and the second PCB board are fixed to the surface of the VC temperature averaging board by adhesive.
[0012] In this solution, the tops of the first PCB board and the second PCB board are adjacent to the lower edges of the first LED lamp and the second LED lamp.
[0013] In this solution, solder pads are provided on the surfaces of the first LED lamp, the second LED lamp, the first PCB board and the second PCB board, and the solder pads are electrically connected to each other through jumpers.
[0014] Furthermore, the other ends of the first PCB board and the second PCB board are also provided with soldering pads, and the power line is provided with a conductor, which is fixed to the soldering pads on the first PCB board and the second PCB board by soldering to form an electrical connection.
[0015] In a preferred embodiment, the surfaces of the first heat sink and the second heat sink are specially treated, such as nickel plating, and the first heat sink and the second heat sink are fixed to the VC temperature plate by soldering. In another embodiment, they can also be fixed by thermally conductive adhesive materials.
[0016] The beneficial effects achieved by the utility model using the above structure are as follows:
[0017] By utilizing the powerful temperature averaging characteristics of the VC temperature vapor chamber, the heat generated by the two groups of LED lamps is rapidly diffused to the entire surface of the VC temperature vapor chamber, and then quickly conducted to the first radiator and the second radiator. The directional air duct formed by the fan and the fan cover quickly transfers the heat on the radiator and the radiator to the surrounding air. In this way, the heat at the first LED lamp and the second LED lamp will not be accumulated, effectively reducing the thermal resistance on the heat conduction path, ensuring that the first LED lamp and the second LED lamp work at a suitable temperature, increasing the reliability of the first LED lamp and the second LED lamp, effectively ensuring their service life, and improving driving safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic diagram of the overall structure of an LED car headlight with an ultra-low thermal resistance channel provided by this solution;
[0019] Figure 2 This is a schematic diagram of the connection structure of the LED lamp, PCB board and temperature equalizing board in this solution;
[0020] Figure 3 for Figure 2 Left view of .
[0021] The meanings of the numbers in the accompanying drawings are as follows:
[0022] 1. Mounting ring, 2. Sealing ring, 3. Screws, 4. First LED light, 5. First PCB board, 6. First radiator, 7. Power cord, 8. Second LED light, 9. Temperature averaging board, 10. Second PCB board, 11. Second radiator, 12. Fan, 13. Fan cover, 14. Jumper, 15. Jumper. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0024] Example 1
[0025] Please refer to Figure 1-3 As shown, this embodiment provides an LED automobile headlight with an ultra-low thermal resistance channel, including a mounting shell, a power line 7, a first LED lamp 4 and a second LED lamp 8, and a heat sink arranged on the mounting shell.
[0026] The heat sink includes a temperature averaging plate 9 and a fan 12. The temperature averaging plate 9 is a VC temperature averaging plate 9, which has a better temperature averaging effect and faster heat diffusion.
[0027] refer to Figure 2As shown, the first LED lamp 4 and the second LED lamp 8 are fixed on the two sides of the temperature equalizing plate 9, and the mounting shell is respectively provided with light-transmitting holes on both sides of the first LED lamp 4 and the second LED lamp 8. A first PCB board 5 for controlling the first LED lamp 4 is provided on one side of the temperature equalizing plate 9, and a second PCB board 10 for controlling the second LED lamp 8 is provided on the other side of the temperature equalizing plate 9.
[0028] One end of the mounting shell is open, and the inside of the mounting shell is provided with a first heat sink 6 and a second heat sink 11 on the outside of the temperature equalizing plate 9, a fan 12 is provided between the first heat sink 6 and the second heat sink 11, and a fan 12 cover is provided at the opening of the mounting shell, and a directional air duct is formed between the fan 12 and the fan 12 cover. A mounting ring 1 and a sealing ring 2 are provided at the other end of the mounting shell.
[0029] Specifically, the first LED lamp 4 and the second LED lamp 8 are fixed on the VC temperature averaging board 9 by soldering, and the first PCB board 5 and the second PCB board 10 are fixed on the surface of the VC temperature averaging board 9 by adhesive. The tops of the first PCB board 5 and the second PCB board 10 are close to the lower edges of the first LED lamp 4 and the second LED lamp 8.
[0030] Furthermore, pads are provided on the surfaces of the first LED lamp 4, the second LED lamp 8, the first PCB board 5, and the second PCB board 10, and the pads are electrically connected to each other through jumpers 14 and 15. Pads are also provided at the other ends of the first PCB board 5 and the second PCB board 10, and a wire is provided in the power cord 7, and the wire is fixed to the pads on the first PCB board 5 and the second PCB board 10 by soldering to form an electrical connection.
[0031] The surfaces of the first heat sink 6 and the second heat sink 11 are specially treated, such as electroplating nickel, and the first heat sink 6 and the second heat sink 11 are fixed to the VC temperature averaging plate 9 by soldering.
[0032] In another embodiment, the connection between the first heat sink 6 and the second heat sink 11 and the VC temperature homogenizing plate 9 can also be fixed by using a thermally conductive adhesive material.
[0033] When in use, the heat generated by the first LED lamp 4 and the second LED lamp 8 is quickly diffused to the entire surface of the VC temperature averaging plate 9 by utilizing the powerful temperature averaging property of the VC temperature averaging plate 9 , and then quickly conducted to the first heat sink 6 and the second heat sink 11 .
[0034] Since a directional air duct is formed between the fan 12 and the fan 12 cover, it is used to quickly transfer the heat on the first radiator 6 and the second radiator 11 to the surrounding air, so that the heat at the first LED lamp 4 and the second LED lamp 8 will not be accumulated, thereby effectively reducing the thermal resistance on the heat conduction path, ensuring that the first LED lamp 4 and the second LED lamp 8 work at a suitable temperature, effectively ensuring the service life, and improving driving safety.
[0035] It should be noted that although the embodiments of the utility model have been shown and described, for ordinary technicians in this field, without departing from the inventive purpose of the utility model, structural methods and embodiments similar to the technical scheme without creative design should all fall within the scope of protection of the utility model.
Claims
1. An LED automobile headlight with an ultra-low thermal resistance channel, comprising a mounting shell, a power line, a first LED lamp, a second LED lamp, and a heat sink disposed on the mounting shell, and powered by the power line, characterized in that: The heat sink comprises a temperature averaging plate, the first LED lamp and the second LED lamp are fixedly arranged on two surfaces of the temperature averaging plate, one surface of the temperature averaging plate is provided with a first PCB board for controlling the first LED lamp, and the other surface of the temperature averaging plate is provided with a second PCB board for controlling the second LED lamp; One end of the mounting shell is opened, and a first heat sink and a second heat sink are arranged inside the mounting shell relative to the outside of the temperature homogenizing plate, a fan is arranged between the first heat sink and the second heat sink, and a fan cover is arranged at the opening of the mounting shell, and a directional air duct is formed between the fan and the fan cover for quickly transferring heat from the first heat sink and the second heat sink to the surrounding air.
2. The LED automobile headlight with ultra-low thermal resistance channel according to claim 1, characterized in that: The temperature averaging plate adopts a VC temperature averaging plate.
3. The LED automobile headlight with ultra-low thermal resistance channel according to claim 1, characterized in that: The other end of the mounting shell is provided with an air intake shell and a gasket.
4. The LED automobile headlight with ultra-low thermal resistance channel according to claim 1, characterized in that: The surfaces of the first LED lamp, the second LED lamp, the first PCB board and the second PCB board are all provided with soldering pads, and the soldering pads are electrically connected to each other through jumpers.
5. The LED automobile headlight with ultra-low thermal resistance channel according to claim 4, characterized in that: The other ends of the first PCB board and the second PCB board are also provided with pads, and the power line is provided with a conductor, which is fixed to the pads on the first PCB board and the second PCB board by soldering to form an electrical connection.
6. The LED automobile headlight with ultra-low thermal resistance channel according to claim 2, characterized in that: The first LED lamp and the second LED lamp are fixed to the VC temperature averaging board by soldering, the first PCB board and the second PCB board are fixed to the surface of the VC temperature averaging board by adhesive, and the first heat sink and the second heat sink are fixed to the VC temperature averaging board by welding.
7. The LED automobile headlight with ultra-low thermal resistance channel according to claim 1, characterized in that: The installation shell is provided with light-transmitting holes on both sides of the first LED lamp and the second LED lamp.