The design of a car headlight using light-emitting diodes (LEDs)

Abstract

The utility model relates to a headlight, in particular to the design of an automobile headlight using light-emitting diodes (LEDs) (hereinafter referred to as an automobile LED headlight). A design of an automobile headlight using light-emitting diodes (LEDs) is proposed. One end of the housing (1) has a flat and straight section and is located opposite the lighting elements (2) formed on a substrate (3). In the middle of the housing (1) a recess (12) for heat dissipation is formed. In the recess (12) for heat dissipation, a heat dissipation part (4) is installed for heat removal. The diameter of the end of the housing (1), connected to the adapter (6), exceeds the diameters of the middle part and the second end of the housing, and a fan (5) for heat dissipation is installed inside this end. The adapter (6) has a ventilation hole (61) allowing cooling air generated by the cooling fan to sequentially cool all components.The design of the automotive LED headlights significantly improves the efficiency of using and dissipating the heat of the cooling air, so that the volume of the heat dissipating part (4) and the volume of the heat dissipating fan (5) can be largely reduced, and the heat dissipating fan (5) can be installed inside the housing (1). Therefore, the size of the entire automotive LED headlight is significantly reduced, and the installation space inside the automotive headlight housing is used more efficiently, and the requirements for use in various vehicle models are met. 4 fig.

Description

FIELD OF TECHNOLOGY

[0001] The utility model relates to a headlight and, in particular, to the design of an automobile headlight with light-emitting diodes (LED) (hereinafter, an automobile LED headlight). TECHNICAL FIELD

[0002] With the continuous development of light-emitting diode (LED) technology and automotive systems, more and more vehicles are using LED headlights to replace traditional xenon headlights. Current automotive LED headlights consist of a front housing and a rear housing. The front housing has a copper substrate and lighting elements located on it. The rear housing has cooling fins, a cooling fan, and a drive system. The lighting elements generate a large amount of heat, which is transferred to the copper substrate and cooling fins. The cooling fan blows air to the cooling fins to dissipate the heat. Compared with traditional xenon headlights, automotive LED headlights have the advantages of stable performance, energy saving, and environmental friendliness.However, the LED headlight's bulk makes it unsuitable for vehicles with limited space. Rotating the headlight after connecting the vehicle's electrical system adapter can be difficult. Furthermore, the LED headlight's drive system is located externally, increasing its bulk and requiring additional wiring to connect the cooling fan. This limits space and wiring layout, affecting the headlight's aesthetics. Furthermore, the cooling fan primarily impacts the cooling fins without affecting other components, limiting heat dissipation efficiency. ESSENCE OF THE UTILITY MODEL

[0003] The purpose of this utility model is to create a compact design for an LED automotive headlight. The design of the LED automotive headlight, made in accordance with this utility model, has high applicability, high heat dissipation efficiency, and high operational safety, thereby meeting the needs of various vehicle models.

[0004] The structure of an automotive LED headlight includes a housing, a substrate located inside the housing and having lighting elements, as well as a radiator and a rotating cooling fan for heat transfer, wherein a chamber is located in the housing, and a cooling fan is located in this chamber, the outer wall of the housing between the cooling fan and the lighting elements has a groove for heat dissipation, and a radiator is located in the heat dissipation groove, which is in contact with the substrate.

[0005] In addition, the housing includes a lighting element section, a heat dissipation section, and a connecting section, which are arranged in series, wherein a cooling fan is located in the connecting section, a heat dissipation groove is located in the heat dissipation section, and the lighting element section is straight and has an opening that allows access to the lighting elements.

[0006] In addition, the inner wall diameter of the connection section is larger than the inner wall diameter of the heat dissipation section.

[0007] In addition, the inner wall of the end of the heat dissipation section facing away from the lighting elements has a fan installation groove in which the fan mounting plate is rigidly fixed, and the rotating shaft of the cooling fan is located on the fan mounting plate.

[0008] In addition, there is a notch on the side of the heat dissipation groove in the housing facing the lighting elements.

[0009] In addition, the radiator comprises a lower heat dissipating plate in contact with the substrate, and a plurality of cooling fins vertically arranged on the outer side of the lower heat dissipating plate, wherein the outer side of the lower heat dissipating plate is located in the plane where the lower surface of the recess of the heat dissipating groove is located, or on the side of the plane facing the substrate.

[0010] In addition, the end of the housing facing away from the lighting elements has an adapter for connecting an automotive system, wherein the side of the adapter facing the lighting elements has an opening and a recessed, inwardly receiving chamber in which a mounting board is fixedly installed, wherein the end of the substrate passes into the receiving chamber and is connected to the printed circuit board.

[0011] In addition, the substrate has a protective hole that matches the cooling fan and allows the cooling fan to pass through it.

[0012] In addition, the adapter has a ventilation hole that communicates with the receiving chamber.

[0013] In addition, the air outlet of the cooling fan faces the radiator.

[0014] In the design of an automotive LED headlight made in accordance with this utility model, a cooling fan and a substrate with lighting elements are installed inside the housing. The housing has an opening corresponding to and exposing the lighting elements. A heat sink is located in a heat dissipation groove on the outer wall of the housing and contacts the substrate to ensure thermal conductivity. When the automotive LED headlight is operating, the adapter is driven by the vehicle system, driving the lighting elements and the cooling fan through the printed circuit board, causing the lighting elements to emit a large amount of heat. Some of the heat is retained on the lighting elements, and some is transferred to the substrate and then to the heat sink. A small amount of heat will also be transferred to the housing, causing the components to heat up to varying degrees. The cooling fan rotates, generating cooling air.Cooling air exits the PCB cooling adapter and is then directed into the housing interior, where it hits the substrate and heatsink. Part of the cooling air continues to blow onto the substrate end and the lighting elements from the housing interior, while part of the cooling air flows from the housing's heat dissipation slot and its recess toward the lighting elements. This ensures that all components are cooled. The design of the automotive LED headlights offers the following benefits. The design of the automotive LED headlight significantly improves the efficiency of cooling air utilization and heat dissipation, allowing for a corresponding reduction in the volume of the heatsink and cooling fan, thereby locating the cooling fan inside the housing. Compared to traditional automotive LED headlights located outside the housing, this utility model significantly reduces the volume of the entire automotive LED headlight.Furthermore, the heat sink in traditional LED headlights is located outside the housing end, where the housing mounting hole is located. The mounting space of the housing mounting hole is extremely limited, which is a key factor complicating the installation of traditional LED headlights. In the LED headlight design according to this utility model, the heat sink is positioned between the cooling fan and the lighting elements, located in an additional internal space within the housing mounting hole. This arrangement provides more installation space and does not block the light generated by the lighting elements.Thus, by improving the radiator position, the automotive LED headlight assembly according to this utility model achieves a compact design, efficiently utilizing the mounting space within the housing, reducing the overall volume of the LED headlight assembly and leaving more mounting space for the automotive electrical system adapter. Thus, the automotive LED headlight assembly according to this utility model can effectively meet the needs of various vehicle models and has wide applicability. BRIEF DESCRIPTION OF DRAWINGS.

[0015] Fig. 1 shows a general view of the structure of an automobile LED headlight;

[0016] Fig. 2 is a side view of the structure of the automobile LED headlight shown in Fig. 1;

[0017] Fig. 3 is a sectional view along line A-A of the structure of the automobile LED headlight shown in Fig. 2;

[0018] Fig. 4 is an exploded view of the structure of the automobile LED headlight shown in Fig. 1;

[0019] Fig. 5 is a structural diagram of an automobile LED headlight with one part of the housing removed;

[0020] Fig. 6 and 7 show, respectively, the internal and external views of the body part;

[0021] Fig. 8 shows the substrate;

[0022] Fig. 9 shows a radiator;

[0023] Fig. 10 shows a cooling fan; and

[0024] Fig. 11 is a top view of the cooling fan shown in Fig. 10. DETAILED DESCRIPTION OF EMBODIMENTS

[0025] The following clearly and completely describes the technical solutions in the embodiments of the present utility model with reference to the drawings. It is obvious that the described examples represent only some, and not all, embodiments of the present utility model. All other embodiments obtained by specialists in the relevant technical field based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0026] It should be noted that all direction indicators (e.g., upper, lower, left, right, front, rear, top, bottom, inner, outer, vertical, transverse, longitudinal, counterclockwise, clockwise, circumferential, radial and axial) in the embodiments of the present utility model are used simply to explain the relationship of the relative positions or motion situations of the components in a specific gesture (as shown in the drawings). If the specific direction changes, the direction indication will also change accordingly.

[0027] Furthermore, terms such as "first" and "second" described in the embodiments of the present utility model are used for descriptive purposes only and are not intended to indicate or imply the relative importance or implicitly indicate the number of the specified technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. Furthermore, the technical solutions of different embodiments may be combined together on the basis that such a combination can be implemented by specialists in the given technical field. If the combination of technical solutions is contradictory or impossible, such a combination is considered non-existent and does not fall within the scope of protection of the present utility model.

[0028] This utility model proposes a design for an automotive LED headlight.

[0029] In one embodiment of the present utility model, the design of an automotive LED headlight comprises a housing 1, a substrate 3 located inside the housing and having lighting elements 2, as well as a radiator 4 and a rotating cooling fan 5 for heat transfer. The housing has a chamber 11, and a cooling fan is located in the chamber. On the outer wall of the housing, between the cooling fan and the lighting elements, there is a groove 12 for heat dissipation. The radiator is located in the groove for heat dissipation and is in contact with the substrate.

[0030] As shown in Fig. 1-11, a cooling fan and a substrate having lighting elements are located inside the housing. The housing has an opening corresponding to and allowing access to the lighting elements. A heat sink is disposed in a heat dissipation groove on the outer wall of the housing and contacts the substrate to ensure heat transfer. When the automotive LED headlight is operating, the lighting elements emit a large amount of heat. Some of the heat is retained on the lighting elements, and some is transferred to the substrate and then to the heat sink. A small amount of heat will also be transferred to the housing, causing the lighting elements, substrate, heat sink, and housing to heat up to varying degrees. The cooling fan rotates, generating cooling air. The cooling air passes through the inner wall of the housing, substrate, heat sink, and lighting elements, dissipating heat from them.

[0031] The housing 1 can be formed as a single piece. Alternatively, as shown in Fig. 4-7, the housing comprises two opposite parts 10. The opposite sides of the two parts of the housing are concave. The substrate 3 and the cooling fan 5 are located between the two parts of the housing to facilitate the installation of components. In the axial direction, the housing 1 comprises a successively arranged section 13 of lighting elements, a heat dissipation section 14 and a connecting section 15. The cooling fan 5 is located in the connecting section. A groove for heat dissipation is located in the heat dissipation section. An opening 16 is located in the straight section of the lighting elements and provides access to the lighting elements 2. Cooling air can smoothly flow between the radiator and the lighting elements, ensuring smooth cooling of the components, which further improves the efficiency of using and dissipating heat of the cooling air.The recess 17 is located on the side of the heat dissipation groove 12 in the housing 1 facing the lighting elements 2. The cooling air can flow smoothly and centrally between the radiator and the lighting elements, thereby avoiding large air losses caused by obstacles in the housing. The diameter of the inner wall of the connecting section 15 is larger than the diameter of the inner wall of the heat dissipation section 14. The size and airflow of the cooling fan can be correspondingly increased to meet the cooling needs. As shown in Figs. 6, 10 and 11, the inner wall of the end of the heat dissipation section 14 facing away from the lighting elements 2 has a groove 18 for mounting the fan. The mounting plate 51 of the fan is fixedly located in the groove for mounting the fan. The rotating shaft of the cooling fan 5 is located on the mounting plate of the fan.The space inside the case can be fully and effectively used to meet the needs of radiator installation, and the size of the cooling fan can be increased to provide sufficient turning space.

[0032] In the structure of an automotive LED headlight, the heat sink may be integrated with the housing and may be made of, for example, aluminum. Alternatively, the heat sink may be detachably mounted on the housing. The heat sink may have various shapes, such as square, wavy, etc. Alternatively, as shown in Fig. 9, the heat sink comprises a lower heat dissipating plate 41 in contact with the substrate 3 and a plurality of cooling fins 42 vertically arranged on the outer side of the lower heat dissipating plate. Gaps between the cooling fins increase the heat dissipation area, ensuring smooth cooling air flow.With regard to the thickness of the lower heat dissipating plate, the outer side of this plate 41 can be located in the plane where the lower surface of the recess 17 of the heat dissipating groove is located, or on the side of the plane facing the substrate 3, in order to prevent said plate from protruding from the groove and to ensure a smooth flow of cooling air to the lighting elements.

[0033] As shown in Fig. 1-5, the end of the housing 1 facing away from the lighting elements 2 has an adapter 6 for connecting to an automotive system. The side of the adapter facing the lighting elements has an opening and a recessed receiving chamber. The printed circuit board 7 is fixedly mounted in the receiving chamber. The end of the substrate 3 passes into the receiving chamber and is connected to the printed circuit board to meet the requirements of the circuit layout. As shown in Fig. 3, 4 and 8, the substrate 3 has a protective hole 31 corresponding to the cooling fan 5 and allowing the fan 5 to pass through it. The design meets the requirements for mounting the cooling fan and increases the contact area between the cooling air and the substrate, ensuring the flow of cooling air through the substrate, thereby improving the efficiency of heat dissipation. As shown in Fig. 1, the adapter 6 has a ventilation hole 61 communicating with the receiving chamber to facilitate the flow of cooling air.Ventilation opening 61 may be shaped as a slit, a square, or another shape. The air outlet of cooling fan 5 may face radiator 4 to create an appropriate airflow or face away from it. Preferably, the air outlet faces the radiator to generate effective cooling air to meet the heat dissipation needs of each component. Adapter 6 may have a cylindrical shape to reduce its diameter and volume while meeting installation requirements. Connecting plate 19 is mounted on the end of housing 1. The connecting plate is connected to adapter 6 via locking screw 8, thereby securing the adapter and housing to each other.

[0034] The above represents merely preferred embodiments of the present utility model, which are not intended to limit the scope of protection of the present utility model. Any transformation of the equivalent structure, made on the basis of the description and drawings of the present utility model, or its direct or indirect application in other related fields of technology, shall fall within the scope of protection of the present utility model.

Claims

1. A design for a car headlight with light-emitting diodes (LEDs) comprising a housing (1), a substrate (3) located inside the housing and having lighting elements (2), a radiator (4) and a cooling fan (5) for heat transfer, configured to rotate, wherein a chamber (11) is formed in the housing and the cooling fan is located in said chamber, wherein the outer wall of the housing between the cooling fan and the lighting elements has a groove (12) for heat dissipation and said radiator is located in this groove in contact with the substrate, wherein the end of the housing (1) facing away from the lighting elements (2) has an adapter (6) for connecting the automotive system, wherein the side of the adapter facing the lighting elements has an opening and a recessed receiving chamber in which the mounting board (7) is fixedly mounted, and the end of the substrate (3) passes into the receiving chamber and is connected to the printed circuit board, wherein the substrate (3) has a protective opening (31) corresponding to the cooling fan (5) and allowing the cooling fan (5) to pass through it.

2. The design according to claim 1, in which the housing (1) comprises a section (13) of lighting elements, a section (14) of heat dissipation and a connecting section (15), which are arranged in series, wherein the cooling fan (5) is located in the connecting section, the groove for heat dissipation is located in the heat dissipation section, and the section of lighting elements is straight and has an opening (16) providing access to the lighting elements (2).

3. The design according to claim 2, in which the diameter of the inner wall of the connecting section (15) is greater than the diameter of the inner wall of the heat dissipation section (14).

4. The design according to claim 2, in which the inner wall of the end of the heat dissipation section (14) facing away from the lighting elements (2) has a groove (18) for installing a fan, and in said groove for installing the fan a mounting plate (51) of the fan is rigidly fixed, on which the rotating shaft of the cooling fan (5) is located.

5. A design according to any one of claims 1 to 4, in which a recess (17) is located in the housing (1) on the side of the groove (12) for heat dissipation facing the lighting elements (2).

6. The design according to any one of claims 1 to 4, in which the radiator comprises a lower heat-dissipating plate (41) in contact with the substrate (3) and cooling fins (42) vertically arranged on the outer side of said plate, wherein the outer side of the lower heat-dissipating plate (41) is located on the plane where the lower surface of the recess (17) of the heat-dissipating groove is located, or on the side of said plane facing the substrate (3).

7. The design according to claim 1, in which the adapter (6) has a ventilation hole (61) communicating with the receiving chamber.

8. The design according to any one of claims 1-4 and 7, in which the air outlet of the cooling fan (5) faces the radiator (4).

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