LED automobile lamp with good heat dissipation effect

Abstract

The utility model relates to the technical field of automobile lamps, in particular to an LED automobile lamp with a good heat dissipation effect, which comprises a lamp body heat dissipation casing and a lens arranged at the front end of the lamp body heat dissipation casing, an LED light source plate, a fin radiator, a PCB (printed circuit board) driving plate and a heat dissipation fan are sequentially arranged in the lamp body heat dissipation casing, heat pipes which are symmetrically arranged are adhered to the LED light source plate, evaporation ends of the heat pipes are contacted with the LED light source plate, and the heat dissipation fan is connected with the fin radiator. The LED light source plate is arranged in the fin radiator, the heat pipe condensation end which is in a forked shape and the LED light source plate are respectively inserted in the fin radiator, the PCB driving plate is arranged in the fin radiator and is electrically connected with the LED light source plate, the lamp body radiating shell is provided with an opening for LED lamp beads on the LED light source plate to be exposed, the opening is provided with a reflection cup, the LED lamp beads are covered with the reflection cup, and a light outlet of the reflection cup faces the lens. According to the utility model, the condensation end of the heat pipe and the end part of the LED light source plate are directly inserted into the fin radiator, so that an efficient heat conduction path from the LED light source plate to the heat pipe to the fin radiator is realized, and the limitation that the traditional heat pipe is only in local contact with the light source plate is broken through.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle lamps, in particular to an LED vehicle lamp with good heat dissipation effect. Background Art

[0002] With the continued rapid development of the automotive industry and the significant improvement in LED luminous efficiency, LED light sources are increasingly widely and deeply used in the field of automotive lighting due to their significant advantages such as high brightness, low energy consumption, long life and fast response.

[0003] Currently, most common LED automotive lights on the market use a cooling solution that combines a metal heat sink, a cooling fan, and a heat pipe to dissipate the heat generated by the LED light source board. For example, the Chinese utility model patent (Announcement No.: CN201920362716.4) discloses an "LED automotive light with a high-efficiency heat dissipation device." However, this type of design has gradually exposed certain limitations in practice: the condensing end of the heat pipe fails to be more effectively integrated with the core components of the cooling system (such as the fin heat sink), resulting in the heat it carries being unable to be efficiently and evenly transferred to the large heat dissipation surface area of ​​the entire metal heat sink. In addition, the driver circuit (PCB driver board) is usually placed separately, and the heat generated by it also increases the thermal load of the system, without forming a synergistic relationship with the main heat dissipation channel. Summary of the Invention

[0004] The purpose of the utility model is to solve the shortcomings of LED car lights in the prior art, such as the failure of the heat pipe condensation end to be deeply integrated with the fin heat sink, resulting in the inability to efficiently conduct heat to the surface of the metal heat dissipation shell, and the PCB driver board being placed independently without coordination with the main heat dissipation channel, resulting in limited heat dissipation effect. The utility model proposes an LED car light with good heat dissipation effect.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An LED automobile lamp with good heat dissipation effect is designed, including a lamp body heat dissipation shell 1 and a lens arranged on the front end of the lamp body heat dissipation shell 1, wherein the lamp body heat dissipation shell 1 is sequentially provided with an LED light source board 3, a fin heat sink 4, a PCB driver board 5 and a cooling fan 6, the LED light source board 3 is affixed with symmetrically arranged heat pipes 7, the evaporation end of the heat pipe 7 is in contact with the LED light source board 3, and the bifurcated condensation end of the heat pipe 7 and the LED light source board 3 are respectively inserted into the fin heat sink 4, the PCB driver board 5 is placed in the fin heat sink 4 and electrically connected to the LED light source board 3, the lamp body heat dissipation shell 1 is provided with an opening 11 for exposing the LED lamp beads 31 on the LED light source board 3, and the opening 11 is provided with a reflective cup 8 covering the LED lamp beads 31 and with the light outlet facing the lens 2.

[0007] Furthermore, the LED lamp beads 31 are respectively provided on both sides of the LED light source board 3, the reflective cup 8 is provided on one of the LED lamp beads 31, and the other LED lamp bead 31 is covered with a decorative panel 32, and the decorative panel 32 is provided with a light-transmitting opening 321; wherein, one of the LED lamp beads 31 is a low-beam light source lamp bead, and the other LED lamp bead 31 is a high-beam light source lamp bead;

[0008] Alternatively, the LED lamp bead 31 is arranged on one side surface of the LED light source board 3 , the reflective cup 8 is arranged above the LED lamp bead 31 , and the LED lamp bead 31 is a low beam light source lamp bead.

[0009] Furthermore, the PCB driver board 5 and the fin heat sink 4 are respectively provided with a first slot 51 and a second slot 41 for inserting the end of the LED light source board 3 therein, and the first slot 51 and the second slot 41 are arranged correspondingly. The end of the LED light source board 3 is also provided with an electrical connection terminal 33 electrically connected to the PCB driver board 5.

[0010] Furthermore, the lamp body heat dissipation shell 1 includes a lamp body 12 and a lens bracket 13 mounted on the front end of the lamp body 12, the lens 2 is arranged on the front end of the lens bracket 13, the opening 11 is opened on the lens bracket 13, the fin heat sink 4 and the cooling fan 6 are arranged inside the lamp body 12, and the lamp body 12 is provided with a mounting groove 121 for inserting the end of the LED light source panel 3 and the condensation end of the heat pipe 7.

[0011] Furthermore, the cooling fan 6 includes a fan fixing part 61 arranged inside the rear end of the lamp body heat dissipation shell 1 and a fan main body 62 fixed in the fan fixing part 61. Ventilation holes 63 that penetrate the interior of the lamp body heat dissipation shell 1 are opened around the top of the fan fixing part 61.

[0012] Furthermore, a chuck 14 fixedly connected to the headlight assembly is sleeved on the heat dissipation housing 1 of the lamp body, and a sealing ring 15 is provided between the connection between the chuck 14 and the heat dissipation housing 1 of the lamp body.

[0013] Furthermore, the lamp body 12 and the lens bracket 13 are respectively an integrated or split structure formed by die-casting or extrusion of heat-dissipating aluminum material or heat-dissipating copper material.

[0014] Furthermore, the evaporation end of the heat pipe 7 is welded and arranged on a side surface of the LED light source board 3 ; or, the evaporation end of the heat pipe 7 is welded and arranged on an end portion of the LED light source board 3 .

[0015] The utility model provides an LED car lamp with good heat dissipation effect, which has the following beneficial effects:

[0016] In the present utility model, the present application realizes an efficient heat conduction path of LED light source board → heat pipe → fin heat sink by directly inserting the condensing end of the heat pipe and the end of the LED light source board into the fin heat sink, breaking through the limitation that the traditional heat pipe only partially contacts the light source board.

[0017] Secondly, in the present invention, the heat generated by the PCB driver board directly embedded in the fin heat sink can be directly absorbed by the fin base of the fin heat sink through physical contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of an LED car lamp with good heat dissipation effect proposed by the utility model;

[0019] Figure 2 for Figure 1 The exploded structure diagram of an LED car lamp with good heat dissipation effect is shown;

[0020] Figure 3 This is a schematic diagram of the overall structure of another LED car lamp with good heat dissipation effect proposed by the present invention;

[0021] Figure 4 for Figure 3 Another exploded structural diagram of an LED car lamp with good heat dissipation effect is shown;

[0022] Figure 5 for Figure 3 Another schematic diagram of the overall structure of an LED car lamp with good heat dissipation effect from another angle is shown;

[0023] Figure 6 for Figure 5 The diagram shows an exploded structure from another angle of another LED car lamp with good heat dissipation effect.

[0024] In the figure: 1. Lamp body heat dissipation shell; 11. Opening; 12. Lamp body; 121. Mounting slot; 13. Lens bracket; 14. Chuck; 15. Sealing ring; 2. Lens; 3. LED light source board; 31. LED lamp beads; 32. Decorative panel; 321. Light-transmitting port; 33. Electrical connection terminal; 4. Fin heat sink; 41. Second slot; 5. PCB driver board; 51. First slot; 6. Cooling fan; 61. Fan fixing part; 62. Fan body; 63. Ventilation port; 7. Heat pipe; 8. Reflective cup. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] Reference Figures 1 to 6 , an LED car lamp with good heat dissipation effect, includes a lamp body heat dissipation shell 1 and a lens arranged on the front end of the lamp body heat dissipation shell 1, an LED light source board 3, a fin heat sink 4, a PCB driver board 5 and a heat dissipation fan 6 are arranged in sequence in the lamp body heat dissipation shell 1, and symmetrically arranged heat pipes 7 are affixed to the LED light source board 3. The evaporation end of the heat pipe 7 contacts the LED light source board 3, and the condensation end of the bifurcated heat pipe 7 and the LED light source board 3 are respectively inserted into the fin heat sink 4, so that the heat on the heat pipe 7 and the LED light source board 3 can be directly introduced into the fin heat sink 4, avoiding the "heat accumulation" effect of the traditional metal shell. At the same time, it can also reduce the heat conduction pressure of the heat pipe 7 on the LED light source board 3 to a certain extent. The PCB driver board 5 is placed in the fin heat sink 4 and electrically connected to the LED light source board 3, so that its heat can be synchronously absorbed by the fin heat sink 4, avoiding the formation of an additional heat source when placed independently. The heat dissipation shell 1 of the lamp body is provided with an opening 11 for exposing the LED lamp beads 31 on the LED light source board 3. A reflective cup 8 is provided on the opening 11, which covers the LED lamp beads 31 and faces the light outlet to the lens 2. By independently covering the reflective cup 8 on the LED lamp beads 31, the large-angle light from the LED lamp beads 31 is collected and the light is distributed twice, so that the light from the light outlet is concentrated to the lens and separated from the heat dissipation structure. This can ensure precise control of the light path while avoiding heat accumulation around the optical components, thereby affecting the performance of the optical components.

[0027] Furthermore, in this embodiment, the heat pipe 7 is symmetrically arranged to form a mirrored heat conduction path, eliminating the lateral temperature gradient of the LED light source board 3 caused by a single heat pipe and achieving uniform temperature on both sides of the heat source, thereby resolving the localized overheating problem caused by traditional biased heat pipes. Furthermore, the condensation end of the heat pipe 7 is bifurcated, splitting the original single condensation path into multiple parallel branches, multiplying the condensation area within a limited length. Furthermore, the design of the heat pipe 7 and fin heat sink 4 of this application can increase the thermal bottleneck of LED automotive lights by one power level without increasing fan power consumption or overall volume, while also balancing reliability, assembly, and cost controllability.

[0028] In addition, in the present utility model, the present application realizes an efficient heat conduction path of LED light source board 3 → heat pipe 7 → fin heat sink 4 by directly inserting the condensation end of the heat pipe 7 and the end of the LED light source board 3 into the fin heat sink 4, breaking through the limitation that the traditional heat pipe only partially contacts the light source board.

[0029] In detail, in the present invention, the heat generated by the LED light source board 3 during operation is transferred through two paths: a. Direct contact conduction: The end of the LED light source board 3 is inserted into the fin heat sink 4, and the heat of the LED light source board 3 is directly introduced into the fin base. b. Phase change heat transfer: The evaporation end of the heat pipe 7 fits tightly against the LED light source board 3 to absorb heat, and quickly transfers the heat to the condensation end through the internal working fluid phase change. The condensation end of the heat pipe 7 is deeply inserted into the fin heat sink 4. At this time, the heat can be evenly diffused to the entire fin array in the fin heat sink 4. Moreover, the heat generated by the PCB driver board 5 directly embedded in the fin heat sink 4 can be directly absorbed by the fin base of the fin heat sink 4 through physical contact.

[0030] Furthermore, in the present invention, the condensing end of the heat pipe 7 and the end of the LED light source board 3 are respectively fixed to the fin heat sink 4 by plugging, which can achieve zero-gap heat conduction. Compared with traditional partial contact solutions, this can effectively reduce thermal resistance. At the same time, it can also form a mechanical interlock, maintaining stable contact under bumpy vehicle conditions. The fin heat sink 4 also carries the heat of the LED light source board 3 and the PCB driver board 5, that is, the primary heat source and the secondary heat source, eliminating thermal interference within the system.

[0031] Furthermore, in this embodiment, if Figures 3 to 6 As shown, LED lamp beads 31 are respectively provided on both sides of the LED light source board 3. A reflector cup 8 covers one of the LED lamp beads 31. The other LED lamp bead 31 is covered with a decorative panel 32. The decorative panel 32 serves as both an optical limiter and a visual shield, achieving uniformity with the vehicle body style and enhancing the overall vehicle styling. A light-transmitting opening 321 is provided on the decorative panel 32. One of the LED lamp beads 31 is a low-beam source, while the other is a high-beam source. This application utilizes a single LED light source board with a double-sided arrangement. Compared to the traditional "low-beam + high-beam" dual-module solution, this reduces the number of components and the axial dimensions, making it suitable for compact headlight spaces. Furthermore, it achieves dual-beam output with a clear low-beam tangent and a focused, long-range high-beam, enhancing nighttime driving safety and meeting regulatory requirements for different lighting modes. Furthermore, the lamp beads on both sides share the same aluminum substrate and heat pipe path, which can concentrate the heat source and shorten the heat dissipation path, thereby reducing the system's thermal resistance.

[0032] Furthermore, in this embodiment, if Figure 1 and Figure 2 As shown, the LED lamp bead 31 is arranged on one side surface of the LED light source board 3, and the reflective cup 8 is arranged above the LED lamp bead 31. The LED lamp bead 31 is a low beam light source lamp bead. The single-sided lamp bead design of this application is suitable for models that do not require high beams or where high beams are provided by an independent module, meeting the requirements of a low-cost platform.

[0033] In addition, in the present invention, through the optional design of the above two structures, the present invention can flexibly adapt to the lighting needs of different models and achieve an optimal balance between performance, cost, volume and thermal management.

[0034] Furthermore, in this embodiment, if Figure 2 、 Figure 4 and Figure 6 As shown, the PCB driver board 5 and the fin heat sink 4 are respectively provided with a first slot 51 and a second slot 41 for the end of the LED light source board 3 to be inserted therein, and the first slot 51 and the second slot 41 are arranged correspondingly. The present application realizes the precise positioning of the LED light source board 3 in the XYZ three directions through the coaxial nested structure of the first slot 51 and the second slot 41, so as to reduce manual alignment errors and improve the yield rate of the automated production line. An electrical connection terminal 33 electrically connected to the PCB driver board 5 is also provided on the end of the LED light source board 3, which can replace the traditional wiring harness connection, so that its electrical path is shortest, thereby improving the driving efficiency.

[0035] Furthermore, in this embodiment, if Figure 2 、 Figure 4 and Figure 6 As shown, the lamp body heat dissipation shell 1 includes a lamp body 12 and a lens bracket 13 mounted on the front end of the lamp body 12. The present application divides the lamp body into a two-section structure consisting of a main heat dissipation cavity and a front-end optical bracket to achieve functional zoning, and the lens bracket 13 is independently detachable, which is convenient for maintaining or upgrading the lens, and the front-end lens bracket 13 does not participate in the main heat dissipation, which can effectively prevent the lens 2 from being deformed or light decayed due to heat. The lens 2 is arranged on the front end of the lens bracket 13, the opening 11 is opened on the lens bracket 13, the fin heat sink 4 and the cooling fan 6 are arranged inside the headlight body 12. The present application completely encloses the high-heat components in the metal headlight body 12, physically separates them from the optical front end, and blocks the heat radiation conduction path. The headlight body 12 is provided with a mounting groove 121 for inserting the end of the LED light source board 3 and the condensation end of the heat pipe 7. The present application realizes one-time mechanical positioning of the LED light source board 3 and the heat pipe 7 through a slot-type structure, allowing them to be directly embedded in the main body heat dissipation wall to form an integrated heat conduction path, so that the heat pipe 7 is in zero-distance contact with the metal wall of the headlight body 12, and the heat is directly diffused to the headlight body 12, thereby realizing efficient heat dissipation and rapid assembly of high heat flux density LEDs in a limited space, which is significantly better than the traditional one-piece metal shell solution.

[0036] Furthermore, in this embodiment, if Figures 1 to 6As shown, the cooling fan 6 includes a fan mount 61 disposed within the rear end of the lamp's heat dissipation housing 1 and a fan body 62 secured within the fan mount 61. The fan mount 61 provides sturdy support and securement for the fan body 62, effectively reducing the impact of vehicle vibration on the fan body during driving. Ventilation holes 63 are formed around the top of the fan mount 61 and connect to the interior of the lamp's heat dissipation housing 1. When the cooling fan is operating, it continuously draws in external air and blows it toward the finned heat sink 4 inside the lamp to remove heat. The design of the vents 63 ensures that air enters the fan mount smoothly and is then blown by the fan body toward the area requiring heat dissipation, creating good air convection and improving heat dissipation efficiency. Furthermore, the layout of the vents 63 helps balance the air pressure inside the lamp, preventing abnormal pressure caused by obstructed air flow, which could affect fan performance and the overall stability of the lamp.

[0037] Furthermore, in this embodiment, if Figure 2 、 Figure 4 and Figure 6 As shown, the heat dissipation shell 1 of the lamp body is provided with a chuck 14 fixedly connected to the headlight assembly, which can quickly lock the entire lamp in the mounting hole of the headlight assembly. A sealing ring 15 is also provided between the connection between the chuck 14 and the heat dissipation shell 1 of the lamp body, which can fill the gap between the chuck 14 and the heat dissipation shell 1 of the lamp body to prevent water vapor and dust from entering the headlight assembly.

[0038] Furthermore, in this embodiment, the lamp body 12 and lens holder 13 are each die-cast or extruded from heat-dissipating aluminum or copper materials, forming an integrated or split structure. This effectively improves the overall structural strength and stability, facilitates rapid heat conduction and dissipation, significantly reduces thermal resistance and assembly errors, and improves heat dissipation efficiency. Furthermore, aluminum's excellent thermal conductivity and light weight ensure efficient heat dissipation and lightweight performance.

[0039] Furthermore, the evaporation end of the heat pipe 7 is welded and arranged on one side surface of the LED light source board 3. The present application can adopt a direct side contact method to reduce the heat transfer path and intermediate links, so that the evaporation end of the heat pipe 7 can sense the temperature change of the LED light source board 3 more quickly and start the heat dissipation process in time. This is useful for dealing with rapid temperature fluctuations of the LED light source board 3, such as instantaneous high-power operation, etc., and can timely and effectively control the temperature and protect the LED chip from heat damage. The evaporation end of the heat pipe 7 is welded and arranged on the end of the LED light source board 3, which can better cooperate with other heat dissipation components (such as side heat dissipation fins, fans, etc.) to form a multi-faceted heat dissipation system. Through reasonable design, the heat dissipation efficiency can be further improved, and the heat dissipation capacity of the entire LED car lamp in different working environments can be enhanced to adapt to a wider range of car usage scenarios.

[0040] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited to them. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. An LED car lamp with good heat dissipation effect, characterized in that: The invention comprises a lamp body heat dissipation shell (1) and a lens arranged on the front end of the lamp body heat dissipation shell (1); an LED light source board (3), a fin heat sink (4), a PCB driver board (5) and a heat dissipation fan (6) are sequentially arranged in the lamp body heat dissipation shell (1); a symmetrically arranged heat pipe (7) is attached to the LED light source board (3); an evaporation end of the heat pipe (7) contacts the LED light source board (3); a bifurcated condensation end of the heat pipe (7) and the LED light source board (3) are respectively inserted into the fin heat sink (4); the PCB driver board (5) is placed in the fin heat sink (4) and electrically connected to the LED light source board (3); the lamp body heat dissipation shell (1) is provided with an opening (11) for exposing the LED lamp bead (31) on the LED light source board (3); and a reflective cup (8) is provided on the opening (11) and is covered on the LED lamp bead (31) and has a light outlet facing the lens (2).

2. The LED automotive lamp with good heat dissipation effect according to claim 1, characterized in that: The LED lamp beads (31) are respectively provided on both sides of the LED light source board (3); the reflective cup (8) is provided on one of the LED lamp beads (31); the other LED lamp bead (31) is covered with a decorative panel (32); and the decorative panel (32) is provided with a light-transmitting opening (321); wherein one of the LED lamp beads (31) is a low-beam light source bead, and the other LED lamp bead (31) is a high-beam light source bead; Alternatively, the LED lamp bead (31) is provided on one side surface of the LED light source plate (3), the reflective cup (8) cover is provided above the LED lamp bead (31), and the LED lamp bead (31) is a low-beam light source lamp bead.

3. The LED automotive lamp with good heat dissipation effect according to claim 1, characterized in that: The PCB driving board (5) and the fin heat sink (4) are respectively provided with a first slot (51) and a second slot (41) for inserting the end of the LED light source board (3), the first slot (51) and the second slot (41) being arranged correspondingly, and the end of the LED light source board (3) is also provided with an electrical connection terminal (33) electrically connected to the PCB driving board (5).

4. The LED automotive lamp with good heat dissipation effect according to any one of claims 1 to 3, characterized in that: The lamp body heat dissipation housing (1) includes a lamp body (12) and a lens bracket (13) sleeved on the front end of the lamp body (12); the lens (2) is arranged on the front end of the lens bracket (13); the opening (11) is opened on the lens bracket (13); the fin heat sink (4) and the heat dissipation fan (6) are arranged inside the lamp body (12); and the lamp body (12) is provided with a mounting groove (121) for inserting the end of the LED light source panel (3) and the condensation end of the heat pipe (7).

5. The LED automotive lamp with good heat dissipation effect according to claim 1, characterized in that: The heat dissipation fan (6) comprises a fan fixing member (61) arranged inside the rear end of the lamp body heat dissipation housing (1) and a fan main body (62) fixed in the fan fixing member (61). Ventilation holes (63) that penetrate the interior of the lamp body heat dissipation housing (1) are provided around the top of the fan fixing member (61).

6. The LED automotive lamp with good heat dissipation effect according to claim 1, characterized in that: The lamp body heat dissipation housing (1) is sleeved with a chuck (14) fixedly connected to the headlight assembly, and a sealing ring (15) is provided between the chuck (14) and the lamp body heat dissipation housing (1).

7. The LED automotive lamp with good heat dissipation effect according to claim 4, characterized in that: The vehicle lamp body (12) and the lens bracket (13) are respectively an integrated or split structure formed by die-casting or extrusion molding using heat-dissipating aluminum material or heat-dissipating copper material.

8. The LED automotive lamp with good heat dissipation effect according to claim 1, characterized in that: The evaporation end of the heat pipe (7) is welded and arranged on a side surface of the LED light source board (3); or, the evaporation end of the heat pipe (7) is welded and arranged on an end portion of the LED light source board (3).

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