Automotive light-emitting diode (LED) headlight structure

Abstract

An automotive light-emitting diode (LED) headlight structure includes a housing, where one end of the housing is provided with a straight section corresponding to lamp beads on a substrate; a middle part of the housing is provided with a heat dissipation slot; a heat sink for heat conduction is provided in the heat dissipation slot; one end of the housing connected to an adapter has a diameter greater than diameters at the middle part and the other end of the housing, and is provided therein with a cooling fan; and the adapter is provided with a ventilation hole for allowing the cooling air generated by the cooling fan to dissipate heat from all components in sequence. The automotive LED headlight structure greatly improves the utilization and heat dissipation efficiency of the cooling air, and appropriately reduces the volume of the heat sink and the cooling fan.

Claims

1. An automotive light-emitting diode (LED) headlight structure, comprising: a housing, a substrate provided inside the housing and provided with lamp beads, and a heat sink and a rotatable cooling fan for conducting heat; wherein a chamber is provided in the housing, and the cooling fan is provided in the chamber; an outer wall of the housing is provided with a heat dissipation slot between the cooling fan and the lamp beads; and the heat sink is provided in the heat dissipation slot and in contact with the substrate, wherein the substrate is provided with an avoidance hole, wherein the avoidance hole corresponds to the cooling fan and allows the cooling fan to pass through.

2. The automotive LED headlight structure according to claim 1, wherein the housing comprises a lamp bead section, a heat dissipation section and a connecting section, wherein the lamp bead section, the heat dissipation section and the connecting section are sequentially arranged; the cooling fan is provided in the connecting section; the heat dissipation slot is provided in the heat dissipation section; and the lamp bead section is straight and provided with a hole for exposing the lamp beads.

3. The automotive LED headlight structure according to claim 2, wherein a diameter of an inner wall of the connecting section is greater than a diameter of an inner wall of the heat dissipation section.

4. The automotive LED headlight structure according to claim 3, wherein a notch is provided at a side of the heat dissipation slot in the housing, wherein the side of the heat dissipation slot in the housing faces the lamp beads.

5. The automotive LED headlight structure according to claim 3, wherein the heat sink comprises a heat dissipation bottom plate in contact with the substrate and a plurality of cooling fins vertically arranged on an outer side of the heat dissipation bottom plate; and the outer side of the heat dissipation bottom plate is provided on a plane where a bottom surface of a notch of the heat dissipation slot is located or at a side of the plane facing the substrate.

6. The automotive LED headlight structure according to claim 3, wherein an air outlet of the cooling fan faces the heat sink.

7. The automotive LED headlight structure according to claim 2, wherein an inner wall of an end of the heat dissipation section facing away from the lamp beads is provided with a fan mounting slot; a fan mounting plate is fixedly provided in the fan mounting slot; and a rotating shaft of the cooling fan is provided on the fan mounting plate.

8. The automotive LED headlight structure according to claim 7, wherein a notch is provided at a side of the heat dissipation slot in the housing, wherein the side of the heat dissipation slot in the housing faces the lamp beads.

9. The automotive LED headlight structure according to claim 7, wherein the heat sink comprises a heat dissipation bottom plate in contact with the substrate and a plurality of cooling fins vertically arranged on an outer side of the heat dissipation bottom plate; and the outer side of the heat dissipation bottom plate is provided on a plane where a bottom surface of a notch of the heat dissipation slot is located or at a side of the plane facing the substrate.

10. The automotive LED headlight structure according to claim 7, wherein an air outlet of the cooling fan faces the heat sink.

11. The automotive LED headlight structure according to claim 2, wherein a notch is provided at a side of the heat dissipation slot in the housing, wherein the side of the heat dissipation slot in the housing faces the lamp beads.

12. The automotive LED headlight structure according to claim 2, wherein the heat sink comprises a heat dissipation bottom plate in contact with the substrate and a plurality of cooling fins vertically arranged on an outer side of the heat dissipation bottom plate; and the outer side of the heat dissipation bottom plate is provided on a plane where a bottom surface of a notch of the heat dissipation slot is located or at a side of the plane facing the substrate.

13. The automotive LED headlight structure according to claim 2, wherein an air outlet of the cooling fan faces the heat sink.

14. The automotive LED headlight structure according to claim 1, wherein a notch is provided at a side of the heat dissipation slot in the housing, wherein the side of the heat dissipation slot in the housing faces the lamp beads.

15. The automotive LED headlight structure according to claim 1, wherein the heat sink comprises a heat dissipation bottom plate in contact with the substrate and a plurality of cooling fins vertically arranged on an outer side of the heat dissipation bottom plate; and the outer side of the heat dissipation bottom plate is provided on a plane where a bottom surface of a notch of the heat dissipation slot is located or at a side of the plane facing the substrate.

16. The automotive LED headlight structure according to claim 1, wherein an end of the housing facing away from the lamp beads is provided with an adapter for connecting an automotive system; a side of the adapter facing the lamp beads is provided with an opening and an inwardly recessed storage chamber; a circuit board is fixedly provided in the inwardly recessed storage chamber; and an end of the substrate extends into the inwardly recessed storage chamber and is connected to the circuit board.

17. The automotive LED headlight structure according to claim 16, wherein the adapter is provided with a ventilation hole communicated with the inwardly recessed storage chamber.

18. The automotive LED headlight structure according to claim 1, wherein an air outlet of the cooling fan faces the heat sink.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a structural diagram of an automotive LED headlight structure;

(2) FIG. 2 is a lateral view of the automotive LED headlight structure shown in FIG. 1;

(3) FIG. 3 is a sectional view taken along line A-A of the automotive LED headlight structure shown in FIG. 2;

(4) FIG. 4 is an exploded view of the automotive LED headlight structure shown in FIG. 1;

(5) FIG. 5 is a structural diagram of the automotive LED headlight structure with one housing part removed;

(6) FIGS. 6 and 7 are respectively internal and external diagrams of the housing part;

(7) FIG. 8 is a structural diagram of a substrate;

(8) FIG. 9 is a structural diagram of a heat sink;

(9) FIG. 10 is a structural diagram of a cooling fan; and

(10) FIG. 11 is a top view of the cooling fan shown in FIG. 11.

DETAILED DESCRIPTION OF THE EMBODIMENTS

(11) The following clearly and completely describes the technical solutions in the embodiments of the present disclosure with reference to drawings. Apparently, the described examples are merely some rather than all of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.

(12) It should be noted that all the directional indications (such as upper, lower, left, right, front, back, top, bottom, inner, outer, vertical, transverse, longitudinal, anticlockwise, clockwise, circumferential, radial, and axial) in the embodiments of the present disclosure are merely used to explain a relative position relationship or motion situations of the components in a specific gesture (as shown in the figures). If the specific gesture changes, the directivity indication also changes accordingly.

(13) Moreover, the terms such as first and second described in the embodiments of the present disclosure are used only for the purpose of description and are not intended to indicate or imply relative importance, or implicitly indicate the number of the indicated technical features. Therefore, features defined by first and second may explicitly or implicitly include at least one of the features. Further, the technical solutions of the various embodiments may be combined together on the basis that the combination is implementable by those of ordinary skill in the art. In case a combination of the technical solutions is contradictory or infeasible, such a combination is deemed inexistent and not falling within the protection scope of the present disclosure.

(14) The present disclosure proposes an automotive light-emitting diode (LED) headlight structure.

(15) In an embodiment of the present disclosure, the automotive LED headlight structure includes housing 1, a substrate 3 provided inside the housing and provided with lamp beads 2, and heat sink 4 and rotatable cooling fan 5 for conducting heat. Chamber 11 is provided in the housing, and the cooling fan is provided in the chamber. An outer wall of the housing is provided with heat dissipation slot 12 between the cooling fan and the lamp beads. The heat sink is provided in the heat dissipation slot and in contact with the substrate.

(16) As shown in FIGS. 1 to 11, the cooling fan and the substrate provided with the lamp beads are provided inside the housing. The housing is provided with a hole corresponding to and exposing the lamp beads. The heat sink for heat conduction is provided in the heat dissipation slot on the outer wall of the housing and is in contact with the substrate to ensure heat conduction. When the automotive LED headlight is working, the lamp beads emit a large amount of heat. A portion of the heat is retained at the lamp beads, while a portion the heat is conducted to the substrate and then to the heat sink. A small amount of the heat will also be conducted to the housing, causing the lamp beads, the substrate, the heat sink, and the housing to heat up to varying degrees. The cooling fan rotates to form cooling air. The cooling air flows through an inner wall of the housing, the substrate, the heat sink, and the lamp beads to dissipate heat from them

(17) The housing 1 can be integrated. Alternatively, as shown in FIGS. 4 to 7, the housing includes two opposite housing parts 10. Opposite sides of the two housing parts are concave. The substrate 3 and the cooling fan 5 are provided between two housing parts for easy component mounting. Along an axial direction, the housing 1 includes sequentially arranged Lamp bead section 13, heat dissipation section 14, and connecting section 15. The cooling fan 5 is provided in the connecting section. The heat dissipation slot is provided in the heat dissipation section. The hole 16 is provided at the straight Lamp bead section and exposes the lamp beads 2. The cooling air can flow smoothly between the heat sink and the lamp beads to cool the components smoothly, further improving the utilization and heat dissipation efficiency of the cooling air. Notch 17 is provided at a side of the heat dissipation slot 12 in the housing 1 facing the lamp beads 2. The cooling air can flow smoothly and centrally between the heat sink and the lamp beads, avoiding a large amount of air loss caused by the obstruction of the housing. A diameter of an inner wall of the connecting section 15 is greater than a diameter of an inner wall of the heat dissipation section 14. The size and airflow of the cooling fan can be increased appropriately to meet the cooling needs. As shown in FIGS. 6, 10, and 11, an inner wall of an end of the heat dissipation section 14 facing away from the lamp beads 2 is provided with fan mounting slot 18. Fan mounting plate 51 is fixedly provided in the fan mounting slot. A rotating shaft of the cooling fan 5 is provided on the fan mounting plate. The layout space inside the housing can be fully and effectively utilized to meet the mounting needs of the heat sink, and the size of the cooling fan can be increased to provide sufficient rotational space.

(18) In the automotive LED headlight structure, the heat sink can be integrated with the housing, and can be for example, made of aluminum. Alternatively, the heat sink can be detachably provided on the housing. The heat sink can be in various shapes such as square, wavy, etc. Alternatively, as shown in FIG. 9, the heat sink includes heat dissipation bottom plate 41 in contact with the substrate 3 and a plurality of cooling fins 42 vertically arranged on an outer side of the heat dissipation bottom plate. Gaps between the cooling fins increase the heat dissipation area, ensuring smooth blowing of the cooling air. Regarding a thickness of the heat dissipation bottom plate, the outer side of the heat dissipation bottom plate 41 can be provided on a plane where a bottom surface of the notch 17 of the heat dissipation slot is located or at a side of the plane facing the substrate 3 to prevent the heat dissipation bottom plate from protruding from the notch and ensure that the cooling air smoothly blows towards the lamp beads.

(19) As shown in FIGS. 1 to 5, the end of the housing 1 facing away from the lamp beads 2 is provided with adapter 6 for connecting an automotive system. A side of the adapter facing the lamp beads is provided with an opening and an inwardly recessed storage chamber. Circuit board 7 is fixedly provided in the storage chamber. An end of the substrate 3 extends into the storage chamber and is connected to the circuit board to meet a circuit layout requirement. As shown in FIGS. 3, 4, and 8, the substrate 3 is provided with avoidance hole 31 corresponding to the cooling fan 5 and allowing the cooling fan 5 to pass through. The design meet the mounting requirement of the cooling fan and increases the contact area between the cooling air and the substrate to ensure that the cooling air flows through the substrate, thereby improving the heat dissipation efficiency. As shown in FIG. 1, the adapter 6 is provided with ventilation hole 61 communicated with the storage chamber to facilitate the flow of the cooling air. The ventilation hole 61 can be in the form of slot, square, or other shape. An air outlet of the cooling fan 5 can face or face away from the heat sink 4 to generate a corresponding airflow. Preferably, the air outlet faces the heat sink to form effective cooling air to meet the heat dissipation needs of each component. The adapter 6 can be cylindrical in shape to reduce its diameter and volume while meeting mounting requirements. An end of the housing 1 is provided with connecting plate 19. The connecting plate is connected to the adapter 6 through locking screw 8, thereby fixing the adapter and the housing to each other.

(20) The above described are merely preferred embodiments of the present disclosure, which are not intended to limit the scope of the patent of the present disclosure. Any equivalent structure transformation made based on the description and drawings of the present disclosure, or direct or indirect application thereof in other related technical fields, should fall within the protection scope of the patent of the present disclosure.