CN213686670U - Heat-conducting plastic LED car lamp radiator - Google Patents

Abstract

The utility model discloses a heat-conducting plastic LED car lamp radiator, which comprises a heat transfer structure and a heat dissipation structure which are fixedly connected, wherein a sealing structure for separating the heat transfer structure from the heat dissipation structure region is arranged between the heat transfer structure and the heat dissipation structure, and the heat dissipation structure comprises a fin fixing table and a plurality of heat dissipation fins fixed on the fin fixing table; the heat transfer structure and the heat dissipation structure are provided with through holes for arrangement of power supply circuits connected with the LED substrate, and the plurality of heat dissipation fins are arranged at positions avoiding the through holes on the fin fixing table; the heat transfer structure and the heat dissipation structure are integrally formed by injection molding of heat-conducting plastic, and the heat conductivity coefficient of the heat-conducting plastic is 5-15W/(m.K). The heat-conducting plastic LED car lamp radiator has the advantages of light weight, simple processing technology, good heat dissipation effect, high design freedom, good processing precision controllability and reasonable structural design; the existing aluminum radiator can be replaced, the production efficiency is improved, and the production cost is saved.

Description

Heat-conducting plastic LED car lamp radiator

Technical Field

The utility model belongs to the technical field of the LED, concretely relates to LED car light radiator.

Background

The lighting lamp in the automobile industry usually adopts the LED as the light source, and the LED light source has the advantages of small volume, long service life, high luminous efficiency, low power consumption, shock resistance and the like, but is limited by the size, and the heat dissipation problem becomes the main factor influencing the service life of the LED light source, especially the LED light source with larger power. The car light on the market usually adopts metal high heat conduction materials such as aluminum alloy as the radiator, dispels the heat through direct contact LED light source. In practical application, a radiator part with smaller actual size requirement is also often processed by adopting a larger size design or a thicker aluminum alloy block, on one hand, the requirement of a small-size aluminum alloy processing technology on size precision is reduced, the yield is improved, the processing cost is reduced, on the other hand, the mechanical strength of the radiator is high, and the requirements of all parties are fully met. However, the aluminum alloy radiator has the disadvantages of high material specific gravity, high processing cost, long molding cycle, need of post-treatment and the like, especially, the aluminum alloy radiator has high specific gravity, and under the condition of a radiator with a large processing size, the weight of the radiator has a large influence on the overall weight of the car lamp module, and the processing size and the weight of the radiator need to be reduced so as to meet the higher requirements of the market on the light weight of automobile parts.

The heat conducting plastic is expected to be applied to the automobile lamp radiator due to the fact that the material specific gravity is light and the heat conducting plastic has a certain heat conducting effect, but the heat conducting coefficient of the heat conducting plastic in the current market is within 3W/(m.K), the heat radiating requirement of a higher automobile lamp cannot be met, and particularly, the heat radiating effect cannot be improved by increasing the heat radiating area and the like under the condition that the structures and the sizes of other parts in the existing automobile lamp module are fixed.

Disclosure of Invention

In order to solve the aforementioned problem that exists among the prior art, the utility model aims to provide a thermal conductivity plastics LED car light radiator that has matter light, processing technology is simple, the radiating effect is good, the design degree of freedom is high, the machining precision controllability is good, structural design is reasonable, can replace current aluminum product radiator specifically realizes through following technical scheme:

a heat-conducting plastic LED car lamp radiator comprises a heat transfer structure and a heat dissipation structure, wherein the heat transfer structure is fixedly connected with the heat transfer structure and the heat dissipation structure is mainly used for transferring heat of an LED substrate; the heat transfer structure and the heat dissipation structure are provided with through holes for arrangement of power supply circuits connected with the LED substrate, and the plurality of heat dissipation fins are arranged at positions avoiding the through holes on the fin fixing table; the heat transfer structure and the heat dissipation structure are integrally formed by injection molding of heat-conducting plastic, and the heat conductivity coefficient of the heat-conducting plastic is 5-15W/(m.K).

Optionally, the sealing structure is a soft sealing ring bound between the heat transfer structure and the heat dissipation structure, and may be a rubber sealing ring, preferably a sealing ring with good temperature resistance.

Optionally, the edge of the heat transfer structure is a convex structure and used for clamping the sealing ring, so that the sealing ring is not displaced and falls off in the installation, use and disassembly processes, and the assembly efficiency of the heat transfer structure and other vehicle lamp assemblies is further improved.

Optionally, the heat transfer structure is further provided with a positioning structure for positioning the LED substrate, so that the LED substrate is conveniently mounted, and preferably, the positioning structure is a plurality of positioning columns.

Optionally, the fin fixing table is provided with a mounting structure for assembling a heat sink.

Optionally, the mounting structure includes a mounting hole, a positioning hole, a mounting buckle, or any other optional fixing means (e.g., direct adhesion fixing).

Optionally, the heat dissipation fins are arranged on the fin fixing table at intervals in the shape of a plurality of cubes, cuboids, cylinders, cones or polyhedrons.

Optionally, the heat dissipation fins are provided with reinforcing ribs for improving the mechanical properties of the heat dissipation fins, preventing the mechanical properties from being reduced when the original aluminum alloy heat dissipation fins are replaced, and easily causing the problem of easy deformation or damage in the processing, transportation or assembling process.

Optionally, the heat dissipation fins have circuit notches left thereon, and the circuit notches are used as channels arranged towards the side surfaces of the heat dissipation fins by the circuits led out from the through holes.

Optionally, the heat transfer structure is further provided with a heat conducting metal sheet matched with the LED substrate, and the heat conducting metal sheet is integrally formed with the heat transfer structure and the heat dissipation structure through a plastic-embedded aluminum process. The high heat conductivity coefficient of the heat-conducting metal sheet is fully utilized to quickly disperse the heat of the LED substrate, then the heat is guided to the heat-radiating structure through the heat-conducting structure to be radiated, and the heat-conducting metal sheet and the heat-conducting plastic interface can be tightly combined through the plastic-embedded aluminum process, so that the thermal resistance is reduced, and the heat transfer efficiency is improved.

In addition, the material of the heat-conducting plastic is nylon plastic containing graphene heat-conducting filler, and the heat conductivity coefficient is 3-15W/(m.K). The high heat dissipation efficiency of the heat-conducting plastic is ensured, and the actual heat-conducting performance and mechanical performance requirements are met.

The radiator of any one of the technical schemes can be used on LED automobile lamps such as fog lamps, steering lamps, brake lamps, dipped headlights, high beam lamps and the like.

Compared with the prior art, the application also has the following beneficial effects:

this application adopts coefficient of heat conductivity to be the thermal conductivity plastics integrated into one piece heat transfer structure and the heat radiation structure of 3~ 15W/(m.K) to combine radiating fin, can satisfy under original aluminum alloy radiator's size demand prerequisite, replace original aluminium system radiator, realize the radiating effect of radiator. Meanwhile, the advantages of plastic material, light weight, convenient processing, low production cost, high production efficiency, high structural design freedom, controllable production precision and the like are introduced into the car lamp radiator. The setting of seal structure prevents that dust and a large amount of steam from getting into LED lamp workspace, influences luminous effect and LED base plate life. The through hole is set, the problem of line arrangement for power supply of the LED substrate is structurally solved for the radiator, the characteristics of convenience in smooth processing such as plastic chamfering can be fully utilized, line abrasion is prevented, and the service life of the overall structure is prolonged.

The heat-conducting plastic LED car lamp radiator has the advantages of light weight, simple processing technology, good heat dissipation effect, high design freedom, good processing precision controllability and reasonable structural design; the existing aluminum radiator can be replaced, the production efficiency is improved, and the production cost is saved.

Drawings

Fig. 1 is a schematic structural view of a heat transfer structure of an LED fog lamp heat sink according to an embodiment.

Fig. 2 is a schematic structural view of one side of a heat dissipation fin of the LED fog lamp heat sink according to the embodiment.

The reference numbers in the figures are: the heat-radiating fin structure comprises a heat-conducting structure 1, a positioning column 2, a fin fixing table 3, a heat-radiating fin 4, a through hole 5, a mounting hole 6, a positioning hole 7 and a protrusion structure 8.

Detailed Description

The technical solutions of the present invention are further described below with reference to specific embodiments, and it should be noted that the specific embodiments of the present invention are not intended to limit the claims of the present invention. Particularly, the LED car lamp heat radiator can be applied to other LED car lamp heat radiators according to the idea of the invention to realize the target effect.

Examples

As shown in fig. 1 and 2, the LED fog lamp heat sink includes a heat transfer structure 1 mainly used for transferring heat of an LED substrate and a heat dissipation structure mainly used for dissipating heat, which are fixedly connected, a sealing structure for separating the heat transfer structure 1 from a heat dissipation structure region is further disposed between the heat transfer structure 1 and the heat dissipation structure, and the heat dissipation structure includes a fin fixing table 3 and a plurality of heat dissipation fins 4 fixed on the fin fixing table 3; the heat transfer structure 1 and the heat dissipation structure are provided with through holes 5 for arrangement of power supply circuits connected with the LED substrate, and the plurality of heat dissipation fins 4 are arranged at positions avoiding the through holes 5 on the fin fixing table 3; the heat transfer structure 1 is further provided with two positioning columns 2 used for positioning the LED substrate, so that the LED substrate can be conveniently mounted.

In the present embodiment, the sealing structure is a sealing ring, and is bound between the heat transfer structure 1 and the heat dissipation structure, and the sealing ring is well known to those skilled in the art, and is not a core innovation point of the present application, so that the sealing ring is not shown in the drawings, and does not substantially affect the case of the technical scheme of the present application.

The edge of the heat transfer structure 1 is provided with a convex structure 8 for clamping the sealing ring, so that the sealing ring is not displaced and falls off in the installation, use and disassembly processes, and the assembly efficiency of the heat transfer structure and other vehicle lamp assemblies is further improved.

The fin fixing table 3 is provided with a positioning hole 7 and three mounting holes 6 for assembling the radiator, and the whole radiator is assembled and fixed through the mounting holes 6.

The heat transfer structure 1 and the heat dissipation structure are integrally formed by injection molding of heat-conducting plastic, the heat-conducting plastic is made of nylon plastic containing graphene heat-conducting fillers, and the heat conductivity coefficient is selected to be close to 10W/(m.K). The high heat dissipation efficiency of the heat-conducting plastic is ensured, and the actual heat-conducting performance and mechanical performance requirements are met.

The heat dissipation fins 4 described in this embodiment are a plurality of cuboids arranged at intervals on the fin fixing table 3.

The technical personnel in the field can also improve the concrete structure of the heat dissipation fin 4 according to the thought of the application, for example, the heat dissipation fin 4 is provided with a reinforcing rib for improving the mechanical property of the heat dissipation fin 4, preventing the mechanical property from being reduced when the heat dissipation fin 4 made of the original aluminum alloy material is replaced, and easily causing the problem of easy deformation or damage in the process of processing, transportation or assembly.

Those skilled in the art can further improve the specific structure of the heat dissipating fin 4 according to the idea of the present application, and the heat dissipating fin 4 is provided with a circuit notch as a channel arranged towards the side surface of the heat dissipating fin 4 by a circuit led out from the through hole 5.

The heat transfer structure 1 can be further improved by those skilled in the art according to the idea of the present application, for example, a heat conducting metal sheet matched with the LED substrate is disposed on the heat transfer structure 1, and the heat conducting metal sheet is integrally formed with the heat transfer structure 1 and the heat dissipation structure through an aluminum embedding molding process. The high heat conductivity coefficient of the heat-conducting metal sheet is fully utilized to quickly disperse the heat of the LED substrate, the heat is guided to the heat-radiating structure through the heat-conducting structure 1 to be radiated, and the heat-conducting metal sheet and the heat-conducting plastic interface can be tightly combined through the plastic-aluminum embedding process, so that the thermal resistance is reduced, and the heat-conducting efficiency is improved. The heat-conducting metal sheet can be made of metal with high heat conductivity coefficient such as aluminum, copper and the like.

The technical personnel in the field can also be based on this application thinking, use it on the relevant radiator of other car LED lamps, replace current aluminum alloy material, like indicator, brake light, passing lamp, far-reaching headlamp.

It should be noted that the above contents described in the present specification are only examples of the technical solution of the present invention. All according to the utility model discloses the patent design simple change or the equivalent change that do of characteristic and principle all be included in the utility model discloses a protection within range. The technical personnel in the technical field of the utility model can make various modifications or supplements or adopt similar mode to replace the concrete embodiment described, as long as not deviating the technical thought of the utility model, all belong to the protection scope of the utility model.

Claims (10)

1. A heat-conducting plastic LED car lamp radiator is characterized by comprising a heat transfer structure and a heat dissipation structure, wherein the heat transfer structure is fixedly connected with the heat transfer structure and the heat dissipation structure is mainly used for transferring heat of an LED substrate; the heat transfer structure and the heat dissipation structure are provided with through holes for arrangement of power supply circuits connected with the LED substrate, and the plurality of heat dissipation fins are arranged at positions avoiding the through holes on the fin fixing table; the heat transfer structure and the heat dissipation structure are integrally formed by injection molding of heat-conducting plastic, and the heat conductivity coefficient of the heat-conducting plastic is 5-15W/(m.K).

2. The lamp radiator of claim 1 wherein said sealing structure is a soft sealing ring bonded between the heat transfer structure and the heat dissipating structure.

3. The lamp heat sink of claim 2 wherein the heat transfer structure edge is a raised structure for capturing a sealing ring.

4. The vehicular lamp heat sink according to claim 1, wherein the heat transfer structure is further provided with a positioning structure for positioning the LED substrate, so as to facilitate mounting of the LED substrate.

5. The vehicular lamp heat sink according to claim 1, wherein the fin fixing stand is provided with a mounting structure for assembling the heat sink.

6. The vehicle lamp heat sink as claimed in claim 5, wherein the mounting structure is one of a mounting hole or a mounting clip.

7. The vehicular lamp heat sink according to claim 5, wherein the heat dissipating fins are provided with circuit notches as passages for the circuits connected by the through-holes to be arranged toward the side of the mounting structure.

8. The vehicle lamp heat sink according to claim 1, wherein the heat dissipating fins are cubes, cuboids, cylinders or cones arranged on the fin fixing platform at intervals.

9. The vehicular lamp heat sink according to claim 1, wherein the heat dissipating fin is provided with a reinforcing rib.

10. The vehicle lamp heat sink as claimed in any one of claims 1 to 9, wherein the heat transfer structure is further provided with a heat conducting metal sheet matching with the LED substrate, and the heat conducting metal sheet is integrally formed with the heat transfer structure and the heat dissipation structure by an aluminum-plastic embedding process.

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