High heat dissipation LED vehicle lamp

Abstract

This utility model discloses a high-heat-dissipation LED vehicle light, comprising a housing composed of a left half-shell and a right half-shell, and a copper substrate sandwiched between the left and right half-shells, with the outer periphery of the copper substrate exposed. At least one LED light source is symmetrically arranged on both sides of the copper substrate. Light-transmitting openings are provided on both the left and right half-shells at positions corresponding to the LED light sources to expose them. A receiving cavity is formed between the left and right half-shells at the rear end of the copper substrate. A driving board and a centrifugal fan facing the copper substrate are disposed within the receiving cavity. The driving board is electrically connected to both the copper substrate and the centrifugal fan. At least one air inlet channel with an open front end communicating with the receiving cavity is formed between the left and right half-shells and the copper substrate. Several air outlet holes communicating with the receiving cavity are provided on the outer periphery of both the left and right half-shells. This utility model effectively improves the heat dissipation effect of the LED vehicle light.

Description

Technical Field

[0001] This utility model belongs to the field of automotive lighting technology, specifically relating to a high-heat-dissipation LED automotive light. Background Technology

[0002] LED automotive lights feature low voltage, uniform light output, long lifespan, instant illumination, and the ability to emit neutral light, offering significant advantages over current mainstream automotive light sources such as halogen lamps and high-voltage discharge (HID) lamps. They provide higher driving safety and are widely used in automotive lighting.

[0003] However, the LED chips used in LED lights generate a lot of heat during operation. If the temperature of the LED chip becomes too high, it can easily burn out, affecting the lifespan of the LED car light. Commercially available LED car lights typically incorporate cooling fans inside the light fixture to dissipate heat.

[0004] Some existing through-hole LED automotive lights consist of a housing and a cooling fan and LED light board housed within the housing. Firstly, the LED light board, located inside the housing, has a small overall surface area and limited contact area with the housing, resulting in poor thermal conductivity and inadequate heat dissipation. Furthermore, the cooling fan uses a conventional fan, working in conjunction with air inlets and outlets at the front and rear ends to achieve airflow. However, this structure suffers from limited airflow range and a small contact area with the housing, leading to poor heat dissipation. This inadequate heat dissipation can easily cause LED light decay and malfunction, or the problem of high heat may be overcome by sacrificing brightness and reducing power. Consequently, the existing structure is only suitable for automotive lights around 20W, and not for high-power LED automotive lights using linear driver ICs (these lights typically require power above 25W). In addition, some LED automotive lights connect the light board and driver board with wires, which, besides being prone to breakage, increases assembly difficulty and reduces yield. Utility Model Content

[0005] The purpose of this invention is to overcome the existing technical defects and provide a high heat dissipation LED vehicle light. By using a dual-channel air intake structure on both sides of the copper substrate, the air intake volume and the contact area between the air and the copper substrate are effectively increased, thereby effectively improving the heat dissipation effect of the LED vehicle light.

[0006] To solve the above-mentioned technical problems, this utility model provides a high heat dissipation LED vehicle light, including a housing composed of a left half-shell and a right half-shell, and a copper substrate sandwiched between the left half-shell and the right half-shell, with the outer periphery of the copper substrate exposed. At least one LED light source is symmetrically arranged on both sides of the copper substrate. Light-transmitting openings are provided on both the left half-shell and the right half-shell at positions corresponding to the LED light sources to expose the LED light sources. A receiving cavity is also formed between the left half-shell and the right half-shell at the rear end of the copper substrate. A drive plate and a centrifugal fan are provided in the receiving cavity. The drive plate is electrically connected to the copper substrate and the centrifugal fan respectively. At least one air inlet channel with an open front end and communicating with the receiving cavity is formed between the left half-shell and the copper substrate. Several air outlet holes communicating with the receiving cavity are provided on the outer periphery of both the left half-shell and the right half-shell.

[0007] Furthermore, two first air intake channels are formed between the left half shell and the copper substrate, respectively located on both sides of the light-transmitting opening and communicating with the receiving cavity; and two second air intake channels are formed between the right half shell and the copper substrate, respectively located on both sides of the light-transmitting opening and communicating with the receiving cavity.

[0008] Furthermore, a first current-collecting channel is formed between the left half-shell and the rear end of the copper substrate, connecting the two first air inlet channels and the receiving cavity, and one end of the light-transmitting opening on the left half-shell is connected to the first current-collecting channel; a second current-collecting channel is also formed between the right half-shell and the rear end of the copper substrate, connecting the two second air inlet channels and the receiving cavity, and one end of the light-transmitting opening on the right half-shell is connected to the second current-collecting channel.

[0009] Furthermore, linear drive ICs are provided on both sides of the copper substrate, and the two linear drive ICs are located in the first current collection channel and the second current collection channel, respectively.

[0010] Furthermore, the outer sides of both the left and right half-shells are recessed with several heat dissipation grooves located at the rear end of the light-transmitting openings.

[0011] Furthermore, the rear end of the copper substrate is provided with two plug arms respectively located on both sides of the centrifugal fan, and the drive plate is provided with two plug slots. The ends of the two plug arms are respectively plugged into the two plug slots and then fixed by welding.

[0012] Furthermore, the rear end of the drive board is provided with two metal inserts that extend outward from the housing.

[0013] Furthermore, the housing is made of graphene or graphene-modified high thermal conductivity plastic, and an insulating adhesive layer is provided between the metal insert and the housing, covering the outside of the metal insert.

[0014] Furthermore, a chuck is provided on the radially protruding outer periphery of the rear end of the housing, and several air outlet holes are provided on the housing at both the front and rear ends of the chuck.

[0015] Furthermore, the left half-shell, the copper substrate, and the right half-shell are fixed together by screws. The copper substrate and the right half-shell are provided with through holes for the front end of the screw to pass through. The left half-shell is provided with a threaded hole for threaded connection with the screw. Two symmetrically arranged openings are also formed between the left half-shell and the right half-shell. The two ends of the drive plate are provided with positioning parts placed at the openings, and the insertion slot is located in the middle of the positioning parts.

[0016] This utility model has the following beneficial effects: In this invention, at least one air intake channel is formed between the left and right halves of the shell and the copper substrate. When the centrifugal fan is working, external cold air can flow into the shell along the air intake channel and then contact the surface of the copper substrate inside the shell. Through the dual-channel air intake structure on both sides of the copper substrate, the air intake volume and the contact area between the air and the copper substrate are effectively increased, thereby effectively improving the heat dissipation effect of the LED car light. Furthermore, the outer periphery of the copper substrate is exposed to the outside and can directly contact the air, which can also accelerate its heat dissipation.

[0017] Secondly, the light-transmitting opening is connected to the internal airflow channel, meaning that air can also enter through the light-transmitting opening. This serves two purposes: firstly, it allows external air to continuously contact the LED light source as it flows in through the light-transmitting opening, thereby accelerating heat dissipation at the LED light source; and secondly, it further increases the internal airflow to improve the heat dissipation effect.

[0018] In addition, the rear end of the copper substrate is connected to the drive board via two plug-in arms located on both sides of the centrifugal fan and then welded in place. This method of replacing wire connections simplifies the overall connection structure, facilitates assembly, and the two plug-in arms also provide protection for the centrifugal fan, which is also beneficial to the stability and efficiency of the overall vehicle light. The housing is made of graphene or graphene-modified high thermal conductivity plastic, which further improves the heat conduction and heat dissipation of the LED vehicle light and effectively reduces the overall cost.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of the invention. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, do not constitute an undue limitation of the present invention. In the drawings: Figure 1 This is a schematic diagram of the LED vehicle lights in the embodiment; Figure 2This is a schematic diagram showing another perspective of the LED vehicle lights in the embodiment; Figure 3 This is a cross-sectional view of the LED vehicle headlight located at the LED light source in the embodiment; Figure 4 This is a cross-sectional view of the LED headlights located at the first and second channels in the embodiment; Figure 5 This is a schematic diagram of the LED headlight after the left half of the shell has been removed in the embodiment; Figure 6 This is a schematic diagram of the left half of the shell in the embodiment; Figure 7 This is a schematic diagram of the right half of the shell in the embodiment; Figure 8 This is a schematic diagram of the copper substrate in the embodiment; Figure 9 This is a schematic diagram of the driver board in the embodiment. Detailed Implementation

[0021] To better understand the technical content of this utility model, the following will further introduce and explain this utility model in conjunction with the accompanying drawings and specific embodiments. It should be noted that if there are descriptions such as "first" and "second" in the text, they are used to distinguish different components, etc., and do not represent the order of priority, nor do they limit "first" and "second" to be different types.

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] Example like Figures 1 to 9As shown in the figure, the high heat dissipation LED vehicle light of this embodiment includes a housing composed of a left half-shell 1 and a right half-shell 2, and a copper substrate 3 sandwiched between the left half-shell 1 and the right half-shell 2. The copper substrate 3 matches the shape of the left half-shell 1 and the right half-shell 1 so that the outer periphery of the copper substrate 3 is exposed to the outside, and direct contact with the air can also accelerate its heat dissipation. At least one LED light source 31 is symmetrically arranged on both sides of the copper substrate 3. Light-transmitting openings 10 are provided on the left half-shell 1 and the right half-shell 2 at the positions corresponding to the LED light source 31 to expose the LED light source 31. A receiving cavity 11 is also formed between the left half-shell 1 and the right half-shell 2 at the rear end of the copper substrate 3. The receiving cavity 11 is provided with a drive plate 4 and a centrifugal fan 5 facing the copper substrate 3. The drive plate 4 is divided into The left half-shell 1 and the right half-shell 2 are electrically connected to the copper substrate 3 and the centrifugal fan 5, respectively, to control the working state of the copper substrate 3 and the centrifugal fan 5. At least one air intake channel with an open front end and connected to the receiving cavity 11 is formed between the left half-shell 1 and the right half-shell 2 and the copper substrate 3. When the centrifugal fan is working, the external cold air can flow into the housing along the air intake channel and then contact the surface of the copper substrate inside the housing. Through the dual-channel air intake structure on both sides of the copper substrate, the air intake volume and the contact area between the air and the copper substrate are effectively expanded, thereby effectively improving the heat dissipation effect of the LED car light. Several air outlet holes 12 connected to the receiving cavity 11 are provided on the outer periphery of the left half-shell 1 and the right half-shell 2. Under the action of the centrifugal fan, the air is scattered in all directions and flows out from the air outlet holes 12.

[0024] In this embodiment, as Figures 3 to 7 As shown, two first air intake channels 13 are formed between the left half shell 1 and the copper substrate 3, respectively located on both sides of the light-transmitting opening 10 and connected to the receiving cavity 11. Two second air intake channels 21 are formed between the right half shell 2 and the copper substrate 3, respectively located on both sides of the light-transmitting opening 10 and connected to the receiving cavity 11. Thus, the multi-channel design on both sides of the copper substrate improves the air intake volume and the contact area between the air and the copper substrate.

[0025] In one embodiment, such as Figures 3 to 7As shown, a first current-collecting channel 14 is formed between the rear end of the left half-shell 1 and the copper substrate 3, connecting the two first air inlet channels 13 and the receiving cavity 11. One end of the light-transmitting opening 10 on the left half-shell 1 is connected to the first current-collecting channel 14, that is, one end of the light-transmitting opening 10 is the air inlet 15. A second current-collecting channel 22 is formed between the rear end of the right half-shell 2 and the copper substrate 3, connecting the two second air inlet channels 21 and the receiving cavity 11. One end of the light-transmitting opening 10 on the right half-shell 2 is connected to the second current-collecting channel 22. Thus, by using current-collecting, the entire copper substrate from the light-transmitting opening to the receiving cavity is exposed in the current-collecting channels on both sides, further expanding the contact area between the incoming air and the copper substrate. The current-collecting channel can be connected to the air inlet at one end of the light-transmitting opening. As the external air flows in from the air inlet at one end of the light-transmitting opening, it continuously contacts the LED light source, achieving the purpose of accelerating heat dissipation at the LED light source. It can also further increase the internal air intake to improve the heat dissipation effect.

[0026] In another embodiment, such as Figures 3 to 8 As shown, linear drive ICs 32 are provided on both sides of the copper substrate 3, and the two linear drive ICs 32 are located in the first current collection channel 14 and the second current collection channel 22 respectively. That is, the current collection channel can not only form a space for accommodating the linear drive IC, but also allow the flowing air to pass through the linear drive IC to achieve the function of cooling and heat dissipation.

[0027] In one embodiment, such as Figures 1 to 9 As shown, two symmetrically arranged openings 23 are formed between the left half shell 1 and the right half shell 2. The two ends of the drive plate 4 are provided with positioning parts 41 placed at the openings 23 to prevent the drive plate from rotating. The rear end of the copper substrate 3 extends with two plug-in arms 33 respectively located on both sides of the centrifugal fan 5. The ends of the plug-in arms 33 are exposed at the openings 23. A plug-in groove 42 is provided in the middle of the positioning part 41. After the ends of the plug-in arms 33 are plugged into the plug-in groove 42, they are fixed by welding. This method of replacing wire connection simplifies the overall connection structure and facilitates assembly. The two plug-in arms can also provide a protective function for the centrifugal fan and are also beneficial to the stability and efficiency of the overall vehicle lights.

[0028] In another practical example, the drive board 4 is fixed to the centrifugal fan 5 with screws.

[0029] In one embodiment, the rear end of the drive board 4 is provided with two metal tabs 43 extending outward from the housing, which are used to connect to the positive and negative terminals of the external vehicle power supply, respectively.

[0030] In another embodiment, the housing is made of graphene, which has excellent thermal conductivity and heat dissipation. Therefore, the housing can further improve the heat conduction and heat dissipation of the LED vehicle light. However, since graphene is conductive, an insulating adhesive layer 44 is provided between the metal insert 43 and the housing to separate the metal insert and the housing, thereby preventing the current at the upper end of the metal insert from being conducted to the housing.

[0031] In another implementation, the shell can also be made of graphene-modified high thermal conductivity plastic, as detailed in the previously published patent CN202410733313.1. It not only has good thermal conductivity and heat dissipation, but also good mechanical properties, flame retardancy and electrical breakdown insulation safety. It is also easy to industrialize and has low production costs, thereby reducing the cost of the products to which it is applied.

[0032] In one embodiment, such as Figure 3 As shown, the left half-shell 1, the copper substrate 3, and the right half-shell 2 are fixed together by two screws 6 distributed front and back.

[0033] Specifically, such as Figures 1 to 8 As shown, the copper substrate 3 and the right half shell 2 are each provided with two through holes 61 for the front end of the screw 6 to pass through, and the two through holes are respectively located at the front and rear ends of the shell. The left half shell 1 is provided with two threaded holes 62 that are respectively threadedly connected to the two screws 6 one by one.

[0034] In one embodiment, such as Figures 1 to 8 As shown, a chuck 7 is provided on the radial protrusion of the outer periphery of the rear end of the housing. Several air outlet holes 12 are provided on the housing at both the front and rear ends of the chuck 7, which can allow the internal air to be blown out from the front and rear ends of the chuck 7 under the action of a centrifugal fan.

[0035] In one embodiment, such as Figures 1 to 2 As shown, the outer sides of both the left half shell 1 and the right half shell 2 are recessed with several heat dissipation grooves 16 located at the rear end of the light-transmitting opening 10, which increases the contact area between the outer surface of the shell and the air, and further improves the heat dissipation effect.

[0036] In other embodiments, the LED light source consists of a plurality of LED beads arranged in a row.

[0037] In other embodiments, the copper substrate is the LED light board.

[0038] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of this utility model. The description of the above embodiments is only for helping to understand the principles of the embodiments of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A high heat dissipating LED vehicle lamp, characterized in that, The device includes a housing consisting of a left half-shell and a right half-shell, and a copper substrate sandwiched between the left and right half-shells, with the outer periphery of the copper substrate exposed. At least one LED light source is symmetrically arranged on both sides of the copper substrate. Light-transmitting openings are provided on both the left and right half-shells at positions corresponding to the LED light sources to expose the LED light sources. A receiving cavity is also formed between the left and right half-shells at the rear end of the copper substrate. A drive plate and a centrifugal fan facing the copper substrate are provided in the receiving cavity. The drive plate is electrically connected to the copper substrate and the centrifugal fan, respectively. At least one air inlet channel with an open front end and communicating with the receiving cavity is formed between the left and right half-shells and the copper substrate. Several air outlet holes communicating with the receiving cavity are provided on the outer periphery of both the left and right half-shells.

2. The high heat dissipating LED vehicle lamp of claim 1, wherein, Two first air intake channels are formed between the left half shell and the copper substrate, respectively located on both sides of the light-transmitting opening and connected to the receiving cavity. Two second air intake channels are formed between the right half shell and the copper substrate, respectively located on both sides of the light-transmitting opening and connected to the receiving cavity.

3. The high heat dissipating LED vehicle lamp of claim 2, wherein, A first current collection channel is formed between the left half-shell and the rear end of the copper substrate, connecting the two first air inlet channels and the receiving cavity, and one end of the light-transmitting opening on the left half-shell is connected to the first current collection channel; a second current collection channel is formed between the right half-shell and the rear end of the copper substrate, connecting the two second air inlet channels and the receiving cavity, and one end of the light-transmitting opening on the right half-shell is connected to the second current collection channel.

4. The high heat dissipating LED vehicle lamp of claim 3, wherein, Linear drive ICs are provided on both sides of the copper substrate, and the two linear drive ICs are located in the first current collection channel and the second current collection channel, respectively.

5. The high heat dissipation LED automotive light as described in claim 4, characterized in that, The outer sides of both the left and right halves of the shell are recessed with several heat dissipation grooves located at the rear end of the light-transmitting openings.

6. The high heat dissipation LED automotive lamp as described in any one of claims 1-5, characterized in that, The rear end of the copper substrate is provided with two plug arms located on both sides of the centrifugal fan. The drive board is provided with two plug slots. The ends of the two plug arms are respectively plugged into the two plug slots and then fixed by welding.

7. The high heat dissipation LED automotive light as described in claim 6, characterized in that, The rear end of the drive board is provided with two metal inserts that extend outward from the housing.

8. The high heat dissipation LED automotive light as described in claim 7, characterized in that, The housing is made of graphene or graphene-modified high thermal conductivity plastic, and an insulating adhesive layer is provided between the metal insert and the housing, covering the outside of the metal insert.

9. The high heat dissipation LED automotive light as described in claim 8, characterized in that, The rear end of the housing has a radially protruding chuck, and the housing at both the front and rear ends of the chuck has several air outlets.

10. The high heat dissipation LED automotive light as described in claim 9, characterized in that, The left half-shell, copper substrate, and right half-shell are fixed together by screws. The copper substrate and right half-shell are provided with through holes for the front end of the screw to pass through. The left half-shell is provided with a threaded hole for threaded connection with the screw. Two symmetrically arranged openings are also formed between the left half-shell and the right half-shell. The two ends of the drive plate are provided with positioning parts placed at the openings. The insertion slot is located in the middle of the positioning parts.

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