CN211625134U

CN211625134U - Heat radiation structure of LED car headlight

Info

Publication number: CN211625134U
Application number: CN202020045475.3U
Authority: CN
Inventors: 肖强
Original assignee: Shenzhen Taiyang Xinyuan Technology Co ltd
Current assignee: Shenzhen Taiyang Xinyuan Technology Co ltd
Priority date: 2020-01-09
Filing date: 2020-01-09
Publication date: 2020-10-02
Anticipated expiration: 2030-01-09

Abstract

The embodiment of the utility model belongs to the technical field of automobile lighting lamps and lanterns, and relates to a heat radiation structure of LED automobile headlamp, which comprises a lamp post formed by connecting a first lamp post and a second lamp post, a copper-based circuit board arranged in the lamp post, and a heat radiation fan arranged at one end part of the lamp post, wherein a first groove along the length direction of the first lamp post is arranged in the inner surface of the first lamp post, a second groove along the length direction of the second lamp post is arranged in the inner surface of the second lamp post, one surface of the copper-based circuit board is attached to the bottom surface of the first groove, and the other surface of the copper-based circuit board is attached to; the outer walls of the end parts of the first lamp pole and the second lamp pole, which are close to the radiating fan, are provided with radiating parts comprising a plurality of radiating fins. By adopting the structure, the heat generated by the LED lamp beads can be quickly dissipated, and the LED automobile headlamp can work at a lower temperature, so that the reliability of the product is enhanced, and the service life of the product is greatly prolonged.

Description

Heat radiation structure of LED car headlight

Technical Field

The utility model relates to an automotive lighting lamps and lanterns field specifically indicates a heat radiation structure for on LED car headlight.

Background

The LED is used as a green and environment-friendly light source, and the inherent characteristics of the LED determine that the LED is the most ideal light source to replace the traditional light source, so that the LED has wide application in various illumination fields. The LED lamp has many advantages, is a novel green environment-friendly light source, has no ultraviolet rays and infrared rays in the spectrum, has no pollution, does not contain mercury elements, is safe to use, and belongs to a typical green lighting source. Meanwhile, the LED also has the advantages of small glare and no radiation.

The application of the LED to the automobile headlamp has high requirements, which mainly show the following aspects:

high brightness and high power are required, the power is 30W or even higher, the heat productivity of the LED lamp bead with high power is very large, the LED lamp is required to have good heat dissipation effect, and if the heat dissipation is not good, the service life of the LED is greatly shortened; the working environment temperature is high, the headlamp assembly is close to the engine, and the environment temperature can reach more than 100 ℃; the LED automobile headlamp is arranged in the assembly, the space in the assembly is small and is a closed space, air cannot naturally flow, and the heat dissipation condition of the LED headlamp is relatively poor; the space in the assembly is small, is restricted by the structure, and the LED automobile headlamp replaces the original automobile halogen lamp and is also arranged in the assembly, so that the LED lamp has small volume and high heat dissipation requirement for ensuring good compatibility.

To sum up, the operational environment of car LED headlight is very abominable, and current LED car headlight product is because the radiating effect is not good, and LED lamp pearl is long-term to work under too high temperature, leads to LED lamp pearl ageing in advance, and the serious luminance step-down of light decay, the defective rate is high, has reduced LED headlight's life and stability greatly.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned heat dissipation-related technical problem, an embodiment of the utility model provides a heat radiation structure for LED car headlight is provided.

The technical scheme is as follows: a heat dissipation structure of an LED automobile headlamp comprises a lamp post formed by mutually connecting a first lamp post and a second lamp post, a copper-based circuit board arranged in the lamp post, and a heat dissipation fan arranged at one end part of the lamp post, wherein a first groove along the length direction of the first lamp post is arranged in the inner surface of the first lamp post, a second groove along the length direction of the second lamp post is arranged in the inner surface of the second lamp post, one surface of the copper-based circuit board is attached to the bottom surface of the first groove, and the other surface of the copper-based circuit board is attached to the bottom surface of the second groove; the outer walls of the end parts of the first lamp pole and the second lamp pole, which are close to the radiating fan, are provided with radiating parts comprising a plurality of radiating fins. Two surfaces of the copper-based circuit board are respectively attached to the bottom surfaces of the first groove and the second groove, heat generated by LED lamp beads on the copper-based circuit board can quickly reach the heat dissipation parts on the first lamp pole and the second lamp pole through the bottom surfaces of the first groove and the second groove, the heat dissipation parts are provided with a plurality of heat dissipation fins, and then the heat dissipation fins are blown by a heat dissipation fan, so that air flow is accelerated, and the heat is quickly dissipated.

Preferably, the copper-based circuit board is a square flat board, the first groove and the second groove are both square, and the depths of the first groove and the second groove are both less than half of the thickness of the copper-based circuit board; the length of the copper-based circuit board is the same as the lengths of the first groove and the second groove. The difference between the depth of the first groove and the second groove and one half of the thickness of the copper-based circuit board is 0.1 mm. When the first lamp post and the second lamp post are combined, the sum of the depths of the first groove and the second groove is smaller than the thickness of the copper-based circuit board, namely, the copper-based circuit board adopts interference fit, so that two surfaces of the copper-based circuit board are ensured to be tightly attached to the bottom surfaces of the first groove and the second groove, and the contact area of the copper-based circuit board with the first lamp post and the second lamp post is increased.

Preferably, the heat dissipation part is formed by integrally molding a body and a plurality of heat dissipation fins arranged on the body, the heat dissipation part is integrally molded with the first lamp post and the second lamp post respectively, and the outer end of the heat dissipation part protrudes out of the end parts of the first lamp post and the second lamp post respectively.

Preferably, the two heat dissipation parts respectively arranged on the first lamp post and the second lamp post are combined to form a whole, a fan bottom cover is arranged at the outer end of the whole, and the heat dissipation fan is fixedly arranged in the fan bottom cover; the fan bottom cover end plate is provided with an air inlet.

Preferably, for convenience of processing and processing cost saving, the first lamp post and the second lamp post are identical in structure.

In order to assist heat dissipation, heat-conducting silicone grease is coated on both surfaces of the copper-based circuit board.

Preferably, two surfaces of the copper-based circuit board are respectively provided with one LED lamp bead, and the positions of the first lamp pole and the second lamp pole corresponding to the LED lamp beads are respectively provided with a through hole for emitting light of the LED lamp beads.

Compared with the prior art, the embodiment of the utility model provides a mainly have following beneficial effect: the structure that the first lamp pole and the second lamp pole completely clamp the copper-based circuit board is adopted, the copper-based circuit board directly extends to the position of a heat dissipation part provided with the heat dissipation fins, the contact area between the copper-based circuit board and the lamp pole is the largest, the optimal heat conduction effect is achieved, the LED lamp beads are attached to the copper-based circuit board, heat generated by the working of the LED lamp beads is rapidly transmitted to the copper-based circuit board and then rapidly transmitted to the first lamp pole and the second lamp pole, the heat dissipation part provided with the large-area heat dissipation fins is the end part of the first lamp pole, which is close to the heat dissipation fan, and the heat dissipation part is blown by the heat dissipation fan, so that air flow is accelerated, heat generated by the LED lamp beads is rapidly dissipated, the LED automobile headlamp works at a lower temperature, the reliability of a product is.

Drawings

In order to illustrate the present invention or prior art more clearly, a brief description of the embodiments or drawings that need to be used in the description of the prior art will now be given.

Fig. 1 is a perspective view of an embodiment of the present invention;

fig. 2 is an end view of an embodiment of the present invention;

fig. 3 is a first exploded view of an embodiment of the present invention;

fig. 4 is a second exploded view of an embodiment of the present invention.

Detailed Description

In order to make the technical field of the present invention better understand, the present invention is further described in detail with reference to the accompanying drawings and embodiments.

As shown in fig. 1-4, the heat dissipation structure of the LED car headlight of the embodiment of the present invention includes a lamp post 100 formed by connecting a first lamp post 1 and a second lamp post 2, a copper-based circuit board 3 disposed in the lamp post, and a heat dissipation fan 4 disposed at an end of the lamp post, wherein a first groove 101 along the length direction of the first lamp post 1 is disposed in an inner surface of the first lamp post 1, a second groove 201 along the length direction of the second lamp post 2 is disposed in an inner surface of the second lamp post 2, one surface of the copper-based circuit board 3 is attached to the bottom surface of the first groove 101, and the other surface is attached to the bottom surface of the second groove 201; the outer walls of the end parts of the first lamp pole 1 and the second lamp pole 2 close to the heat dissipation fan are respectively provided with a heat dissipation part 6 comprising a plurality of heat dissipation fins.

Two surfaces of the copper-based circuit board 3 are respectively attached to the bottom surfaces of the first groove 101 and the second groove 201, heat generated by the LED lamp beads 5 on the copper-based circuit board 3 can quickly reach the heat dissipation part 6 on the first lamp post 1 and the second lamp post 2 through the bottom surfaces of the first groove 101 and the second groove 201, the heat dissipation part 6 is provided with a plurality of heat dissipation fins 601, and then the heat dissipation fins are blown by the heat dissipation fan 4 to accelerate air flow, so that the heat is quickly dissipated.

The first lamp pole 1 and the second lamp pole 2 are both made of pure aluminum and have good heat dissipation performance.

Here, the copper-based circuit board 3 is a square flat plate, the first groove 101 and the second groove 201 are both square, and the depth of the first groove and the depth of the second groove are both less than one half of the thickness of the copper-based circuit board; the length of the copper-based circuit board 3 is the same as the length of the first groove 101 and the second groove 201. Specifically, the difference between the depth of the first groove and the second groove and one half of the thickness of the copper-based circuit board is 0.1mm, namely, the difference is about 10 wires. When the first lamp post 1 and the second lamp post 2 are combined, the sum of the depths of the first groove 101 and the second groove 201 is smaller than the thickness of the copper-based circuit board 3, namely, interference fit is adopted, so that two surfaces of the copper-based circuit board 3 are ensured to be tightly attached to the bottom surfaces of the first groove and the second groove, the contact area between the copper-based circuit board 3 and the first lamp post 1 and the contact area between the copper-based circuit board 3 and the first groove and between the copper-based circuit board 3 and the second groove are increased, and gaps or poor contact between the copper-.

Specifically, the heat dissipation portion 6 is formed by integrally molding a body 602 and a plurality of heat dissipation fins 601 arranged on the body, the heat dissipation portion is integrally molded with the first lamp post 1 and the second lamp post 2, and the outer end of the heat dissipation portion 6 protrudes out of the end portions of the first lamp post 1 and the second lamp post 2. Namely, the heat dissipation part arranged on the first lamp post 1 is integrally formed with the first lamp post 1, and the heat dissipation part on the first lamp post 1 protrudes out of the end part of the first lamp post 1; the same is true for the relationship between the second lamp post 2 and the heat dissipation portion.

In order to fix the heat dissipation fan 4, the two heat dissipation parts 6 respectively arranged on the first lamp pole 1 and the second lamp pole 2 are combined to form a whole, a fan bottom cover 7 is arranged at the outer end of the whole, and the heat dissipation fan 4 is fixedly arranged in the fan bottom cover 7; an air inlet 701 is arranged on the end plate of the bottom cover of the fan.

The fan bottom cover 7 has two functions, namely, the heat radiation fan 4 is protected, foreign matters are prevented from blocking the fan blades of the heat radiation fan, and the heat radiation fan is protected from working normally; secondly, isolating hot air, the discrete heat fins 601 at the air inlet 701 of the fan bottom cover 7 are relatively far away, the air entering from the air inlet of the fan bottom cover is relatively low in temperature, the air with lower temperature blows against the heat fins 601 to have better heat dissipation effect, the fan bottom cover 7 enables the wind of the heat dissipation fan 4 to have directional effect, the wind is blown in a concentrated direction against the heat fins 601, and the wind is not blown out from the side surfaces and other directions of the fan blades, so that the air flowing speed on the heat fins 601 is greatly increased, the heat dissipation effect is improved, the air flowing forms a fixed direction, cold air enters from the air inlet 701 of the fan bottom cover 7, blows towards the heat fins 601 through the heat dissipation fan 4, then blows hot air out through the heat fins to dissipate the heat of the heat fins 601, and finally the LED lamp beads 5 work at lower temperature through the series of heat transfer and heat dissipation, the reliability and the service life of the whole LED automobile headlamp are greatly improved.

In order to facilitate the processing and save the processing cost, the first lamp post 1 and the second lamp post 2 have the same structure, that is, the first lamp post and the second lamp post are made into the same structure.

In order to assist in heat dissipation, both surfaces of the copper-based circuit board 3 are coated with heat conductive silicone grease.

Specifically, two surfaces of the copper-based circuit board 3 are respectively provided with one LED lamp bead 5, which corresponds to the LED lamp beads, and the positions of the first lamp pole 1 and the second lamp pole 2 corresponding to the LED lamp beads are respectively provided with one through hole 8 for emitting light of the LED lamp beads 5.

The structure that the first lamp post 1 and the second lamp post 2 completely clamp the copper-based circuit board 3 is adopted, the copper-based circuit board 3 directly extends to the position of the heat dissipation part 6 provided with the heat dissipation fins 601, the contact area between the copper-based circuit board 3 and the lamp post 100 is the largest, the best heat conduction effect is achieved, the LED lamp beads 5 are attached to the copper-based circuit board 3, heat generated by the work of the LED lamp beads 5 is rapidly transferred to the copper-based circuit board 3, then fast again reach first lamp pole 1 and second lamp pole 2 on, the tip that first lamp pole 1 is close with second lamp pole 2 and radiator fan 4 is just setting up large tracts of land heat radiation fin 601's radiating part 6, blows radiating part 6 through radiator fan 4 again, and the air flow is accelerated, distributes away the heat that LED lamp pearl 5 produced fast, lets LED car headlight work under lower temperature to strengthen the reliability of product, prolong the life of product greatly.

It is to be understood that the above-described embodiments are only some of the embodiments of the present invention, and not all embodiments, and that the appended drawings illustrate preferred embodiments of the present invention, but do not limit the scope of the invention. The present invention may be embodied in many different forms and, on the contrary, these embodiments are provided so that this disclosure will be thorough and complete. All utilize the equivalent structure that the content of the utility model discloses a specification and attached drawing was done, direct or indirect application is in other relevant technical field, all is in the same way the utility model discloses within the patent protection scope.

Claims

1. A heat radiation structure of an LED automobile headlamp comprises a lamp post formed by mutually connecting a first lamp post and a second lamp post, a copper-based circuit board arranged in the lamp post and a heat radiation fan arranged at one end part of the lamp post, and is characterized in that a first groove along the length direction of the first lamp post is arranged in the inner surface of the first lamp post, a second groove along the length direction of the second lamp post is arranged in the inner surface of the second lamp post, one surface of the copper-based circuit board is attached to the bottom surface of the first groove, and the other surface of the copper-based circuit board is attached to the bottom surface of the second groove; the outer walls of the end parts of the first lamp pole and the second lamp pole, which are close to the radiating fan, are provided with radiating parts comprising a plurality of radiating fins.

2. The heat dissipation structure of an LED automobile headlamp according to claim 1, wherein the copper-based circuit board is a square plate, the first groove and the second groove are both square, and the depth of the first groove and the depth of the second groove are both less than half of the thickness of the copper-based circuit board; the length of the copper-based circuit board is the same as the lengths of the first groove and the second groove.

3. The heat dissipating structure of an LED headlamp according to claim 2, wherein the difference between the depth of the first groove and the second groove and one-half of the thickness of the copper-based wiring board is 0.1 mm.

4. The heat dissipating structure of an LED car headlight as claimed in claim 1, wherein the heat dissipating portion is formed by integrally molding a body and a plurality of heat dissipating fins on the body, the heat dissipating portion is integrally molded with the first pole and the second pole, respectively, and outer ends of the heat dissipating portion protrude from ends of the first pole and the second pole, respectively.

5. The heat dissipating structure of an LED car headlight as claimed in claim 4, wherein the two heat dissipating parts separately disposed on the first pole and the second pole are combined to form a whole, a fan bottom cover is disposed at an outer end of the whole, and the heat dissipating fan is fixedly disposed in the fan bottom cover; the fan bottom cover end plate is provided with an air inlet.

6. The heat dissipation structure of claim 4, wherein the first pole and the second pole are identical in structure.

7. The heat dissipation structure of an LED automobile headlamp according to any one of claims 1 to 6, wherein both surfaces of the copper-based circuit board are coated with heat conductive silicone grease.

8. The heat dissipating structure of an LED car headlight as claimed in claim 7, wherein one LED lamp bead is disposed on each of two surfaces of the copper-based circuit board, and a through hole is disposed at each of the first and second lamp posts corresponding to the LED lamp bead for emitting light from the LED lamp bead.