Heat dissipation system for small-space multi-functional requirements on vehicle lights

Abstract

The object of the present invention is to provide a heat dissipation system for meeting the multi-functional requirements in a small space on a vehicle headlight. The L-shaped radiator body takes into account the heat dissipation design for two major heat sources, namely the lamp board and the driver board, with small space occupation and high heat dissipation efficiency. The heat dissipation horizontal main structure of the driver board located outside the lamp housing can conduct heat in a timely and efficient manner and enable more sufficient heat exchange inside and outside the lamp. In the vehicle headlight heat dissipation module, a semi-flexible printed circuit board can realize the functions of the lamp board PCB, the driving function of the driver board PCB, and the connection function of the flexible connection PCB by using only one circuit board, saving wiring harnesses, with high connector integration, flexible space, and achieving a low-cost design for multi-functions. The vehicle headlight heat dissipation module M takes into account the installation and sealing with the lamp housing. The vehicle headlight heat dissipation module M only includes four parts, incorporating all functions of the functional main body, the driving main body, the heat dissipation structure, the installation structure, and the sealing structure. It has high integration, simple design, and is convenient for structural modularization.

Description

Technical Field

[0001] The present invention relates to the field of automotive lighting, and particularly to a heat dissipation system for meeting the multi-functional requirements in a small space on a vehicle lamp. Background Art

[0002] Currently, vehicle lamp lighting is developing towards intelligence, practicality, user-friendliness, etc. The user's requirements have changed from the demand for traditional single lighting functions to multi-functional and comprehensive requirements in aspects such as appearance, intelligence, and adaptability. The resulting changes will have a profound impact on the design of vehicle lamps. For example, requirements such as intelligence and adaptability will deepen the design requirements for electronic circuits, making the design of control circuits more complex, thereby significantly increasing the overall power consumption of vehicle lamps. Requirements such as appearance will change the design scheme of the decorative parts inside the lamp, increasing the number of parts inside the lamp and reducing the space, thus resulting in the compression of the heat dissipation space. All of the above require the heat dissipation design to be improved to a more efficient, lightweight, and integrated level.

[0003] Currently, the heat dissipation technology for vehicle lamps still mainly relies on natural convection heat dissipation and forced convection heat dissipation. Most adopt the natural convection mode. For the main functional modules with high integration and high power, forced convection heat dissipation may be used. However, for the heat dissipation of non-main functions such as high and low beams, due to limitations in space, cost, etc., the natural convection heat transfer method is still mainly used. The current natural convection heat transfer method is still limited to the design of single functions and single modules, and often cannot comprehensively consider the combined heat dissipation of various functions. Therefore, it occupies a large design space, and the heat dissipation efficiency cannot be significantly improved. Most are one-to-one designs and do not have continuity.

[0004] Therefore, it is urgent to improve the efficiency of traditional natural convection heat dissipation. The present invention is a new application of the traditional natural convection heat dissipation method, enabling it to meet the design requirements in multiple aspects such as small space, multi-function, high efficiency, integration, modularization, and low cost. Summary of the Invention

[0005] To solve the above problems, the present invention provides a heat dissipation system for meeting the multi-functional requirements in a small space on a vehicle lamp. The L-shaped radiator main body takes into account the heat dissipation design of two major heat sources, namely the lamp board and the driver board, with small space occupation and high heat dissipation efficiency. The heat dissipation horizontal main structure of the driver board located outside the lamp housing can conduct heat in a timely and efficient manner, and the system of the present invention enables more sufficient heat exchange inside and outside the lamp.

[0006] The semi-flexible printed circuit board in the headlight heat dissipation module can achieve the functions of the main body of the lamp board PCB, the driving function of the driving board PCB, and the connection function of the flexible connection PCB with only one circuit board, saving structures such as wire harnesses and connectors. It has a high integration level, flexible space, and realizes a low-cost design with multiple functions. The headlight heat dissipation module M takes into account the installation and sealing with the lamp housing. The headlight heat dissipation module M only includes four parts, that is, all functions of the main body, the driving body, the heat dissipation structure, the installation structure, and the sealing structure are included. It has a high integration level, a simple design, and is convenient for structural modularization, solving the problems in the background technology.

[0007] The object of the present invention is to provide a heat dissipation system for small-space multi-functional requirements on a headlight, including: an L-shaped radiator main body, a semi-flexible printed circuit board, a sealing ring, printed circuit board fixing screws, a lamp housing, and structural installation fixing screws.

[0008] Among them, the L-shaped radiator main body is composed of two parts of heat dissipation structures, namely the vertical main body structure for lamp board heat dissipation - and the horizontal main body structure for driving board heat dissipation -. The vertical main body structure for lamp board heat dissipation - and the horizontal main body structure for driving board heat dissipation - are integrally cast, without auxiliary installation and matching structures. The part of the vertical main body structure for lamp board heat dissipation - that cooperates with the sealing ring is a boss -, and the boss - protrudes from the upper surface of the vertical main body structure for lamp board heat dissipation -.

[0009] The semi-flexible printed circuit board is composed of three parts of structures, namely the lamp board PCB, the driving board PCB, and the flexible connection PCB. The lamp board PCB part is the main body of the function, used to set the LED light source. The driving board PCB part is the driving main body, used to control and input voltage and current to the lamp board PCB. The flexible connection PCB part connects the lamp board PCB part and the driving board PCB part. The flexible connection PCB retains the wiring layer of the connection line and has toughness.

[0010] The semi-flexible printed circuit board is fixed on the L-shaped radiator main body through the printed circuit board fixing screws.

[0011] The sealing ring passes through the horizontal main body structure for driving board heat dissipation - and is installed on the outside of the boss - structure on the vertical main body structure for lamp board heat dissipation of the semi-flexible printed circuit board.

[0012] The headlight heat dissipation module M composed of four parts, namely the L-shaped radiator main body, the semi-flexible printed circuit board, the sealing ring, and the printed circuit board fixing screws, is fixed on the lamp housing through the structural installation fixing screws.

[0013] Further improvements are: the L-shaped radiator body takes into account the heat dissipation design of the two major heat sources, the lamp board and the driver board, with high heat dissipation efficiency and small space occupancy: the lamp board PCB and the lamp board heat dissipation vertical main structure are fixed, and the driver board PCB and the driver board heat dissipation horizontal main structure are fixed, which jointly solve the heat dissipation problem of the lamp board PCB and the driver board PCB. The two parts of heat share the L-shaped radiator body, realizing the heat dissipation design of the two major heat sources, the lamp board and the driver board, in the same radiator; the driver board heat dissipation horizontal main structure is on the outside of the lamp housing, with high heat dissipation efficiency, and the heat inside the lamp can be promptly exported to the outside of the lamp through the L-shaped radiator body, so that the efficiency of the radiator is maximized.

[0014] Further improvements are as follows: in the headlight cooling module M, the fin outer contour design of the driving board cooling horizontal main structure - fully considers the shape of the lamp housing, so that the driving board cooling horizontal main structure - can smoothly pass through the installation passage reserved in the lamp housing and penetrate deep into the lamp; and the design of the light board cooling vertical main structure - and the sealing ring is completely matched with the shape of the lamp housing, taking into account the heat dissipation of the headlight cooling module M as well as the installation and sealing with the lamp housing.

[0015] Further improvements are as follows: the headlight heat dissipation module M has its own driving circuit, and the semi-flexible printed circuit board is connected through a flexible connection PCB, saving structures such as wiring harnesses and connectors, and realizing a multifunctional low-cost design.

[0016] A further improvement is that the vertical main structure of the lamp board for heat dissipation and the horizontal main structure of the drive board for heat dissipation are preferably at right angles to each other.

[0017] Further improvements are: the sealing ring and the protrusion of the L-shaped radiator body are assembled on the boss on the upper surface of the vertical main structure of the lamp panel for heat dissipation, preferably an interference fit; the outer opening structure of the lamp housing and the sealing ring are assembled, preferably an interference fit or zero clearance fit, and the contour shapes are matched to ensure the sealing effect, so that the car lamp heat dissipation module M can be installed on the lamp housing and achieve sealing.

[0018] Beneficial effects of the present invention: The L-shaped radiator body of the present invention takes into account the heat dissipation design of the two major heat sources of the lamp board and the driving board, occupies a small space and has high heat dissipation efficiency; the horizontal main body structure of the driving board heat dissipation located outside the lamp housing can conduct heat in a timely and efficient manner, and the system of the present invention realizes more sufficient heat exchange between the inside and outside of the lamp;

[0019] In the headlight cooling module, a semi-flexible printed circuit board can achieve the functions of the main body of the lamp board PCB, the driving function of the driving board PCB, and the connection function of the flexible connection PCB by using only one circuit board. This saves structures such as wire harnesses and connectors, has a high integration level, flexible space, and realizes a low-cost design with multiple functions; the headlight cooling module M takes into account the installation and sealing with the lamp housing; the headlight cooling module M only includes four parts, that is, all functions of the main body, driving body, heat dissipation structure, installation structure, and sealing structure are included; it has a high integration level, simple design, and is convenient for structural modularization. Brief Description of the Drawings

[0020] Figure 1 Is an isometric view of the headlight cooling module M of the present invention.

[0021] Figure 2 Is an isometric view of the heat dissipation system of the present invention.

[0022] Figure 3 Is a schematic diagram of the installation method of the headlight cooling module M of the present invention.

[0023] Figure 4 Is a schematic diagram of the relative position of the internal structure of the heat dissipation system of the present invention.

[0024] Figure 5 Is a schematic diagram of the design of the lamp housing matching the headlight cooling module M in the present invention.

[0025] Figure 6 Is of the present invention Figure 5 Sectional view A-A.

[0026] Figure 7 Is an application schematic diagram of the present invention as a daytime running light module matching with an optical waveguide.

[0027] Wherein: 1-L-shaped radiator main body, 2-semi-flexible printed circuit board, 3-sealing ring, 4-fixed screw for printed circuit board, 5-lamp housing, 6-fixed screw for structural installation, 7-optical waveguide, M-cooling module, 1-1-vertical main structure for lamp board heat dissipation, 1-2-horizontal main structure for driving board heat dissipation, 1-3-boss, 2-1-lamp board PCB, 2-2-driving board PCB, 2-3-flexible connection PCB. Detailed Description of the Invention

[0028] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments. These embodiments are only used to explain the present invention and do not constitute a limitation to the protection scope of the present invention.

[0029] Such as Figure 1-7As shown, this embodiment provides a heat dissipation system for small space multi-function requirements on vehicle lamps, and its main structure includes: L-shaped heat sink body 1, semi-flexible printed circuit board 2, sealing ring 3, printed circuit board fixing screws 4, lamp housing 5, structure installation fixing screws 6, and light guide 7. The L-shaped heat sink body 1 is composed of two parts: the vertical main structure 1-1 of the light board heat dissipation and the horizontal main structure 1-2 of the drive board heat dissipation. The L-shaped heat sink body 1 is integrally cast and does not require auxiliary installation matching structure; the semi-flexible printed circuit board 2 is composed of three parts, namely the light board PCB2-1, the drive board PCB2-2 and the flexible connection PCB2-3.

[0030] like Figure 1 As shown, the semi-flexible printed circuit board 2 is fixed on the L-shaped radiator body 1 by the printed circuit board fixing screws 4; the sealing ring 3 passes through the horizontal main structure 1-2 of the driving board heat dissipation and is installed on the outside of the boss 1-3 structure on the vertical main structure 1-1 of the light board heat dissipation of the semi-flexible printed circuit board 2; the car light heat dissipation module M is composed of the L-shaped radiator body 1, the semi-flexible printed circuit board 2, the sealing ring 3, and the printed circuit board fixing screws 4.

[0031] In the past, the functional light board and the driver board were designed on two independent PCBs and connected via a wiring harness. Therefore, if a radiator is needed, it will be added to the PCBs that need heat dissipation. In the headlight heat dissipation module M, the heat of the light board PCB2-1 and the driver board PCB2-2 share the L-shaped radiator body 1, realizing a heat dissipation design that takes into account the two major heat sources of the light board and the driver board in the same radiator, which not only ensures heat dissipation, but also greatly reduces the number of parts and costs.

[0032] The headlight heat dissipation module M has its own driving circuit, and the semi-flexible printed circuit board 2 is connected through the flexible connection PCB2-3, which saves structures such as wiring harnesses and connectors, and realizes a multifunctional low-cost design; wherein the flexible connection PCB2-3 part is the bottom layer of the circuit board 2, and the flexible connection PCB2-3 includes an insulating functional layer, a substrate layer, and a wiring layer arranged between the insulating functional layer and the substrate layer. The substrate layer is obtained by shaving off most of the thickness of the substrate layer of the original semi-flexible printed circuit board 2, leaving only a thin layer of the substrate layer for covering the wiring layer, so the flexible connection PCB2-3 not only retains the connection line (i.e., the wiring layer), but also has a certain toughness (the original substrate layer is shaving off most of the thickness, leaving only a thin layer, and the insulating layer itself is relatively thin, so the entire flexible connection PCB2-3 is thin and tough), and can achieve bending at a certain angle;

[0033] In the headlight heat dissipation module M, it only includes four partial structures: an L-shaped radiator main body 1, a semi-flexible printed circuit board 2, a sealing ring 3, and a printed circuit board fixing screw 4. That is, it includes all the functions of the functional main body (the lamp board PCB 2-1 in the semi-flexible printed circuit board 2), the driving main body (the driving board PCB 2-2 in the semi-flexible printed circuit board 2), the heat dissipation structure (the lamp board heat dissipation vertical main body structure 1-1 and the driving board heat dissipation horizontal main body structure 1-2 of the L-shaped radiator main body 1), the installation structure (the boss 1-3 and the printed circuit board fixing screw 4), and the sealing structure (the sealing ring 3). It has a high functional integration degree and a simple design, which is convenient for structural modularization.

[0034] As Figure 2 , Figure 3 , Figure 4 shown, the headlight heat dissipation module M is fixed on the lamp housing 5 through the structural installation fixing screw 6. After installation, the driving board heat dissipation horizontal main body structure 1-2 is inside the lamp housing 5, while the lamp board heat dissipation vertical main body structure 1-1 is outside the lamp housing 5.

[0035] The driving board heat dissipation horizontal main body structure 1-2 is on the outer side of the lamp housing 5, and the heat dissipation efficiency is relatively high. The heat inside the lamp can be timely led out of the lamp through the L-shaped radiator main body 1, maximizing the efficiency of the radiator. Compared with the conventional heat dissipation structures inside or outside the lamp, it can make the heat exchange between the inside and outside of the lamp more sufficient, and the overall structural space occupation is small, especially the occupation of the space inside the lamp is small, and the space utilization rate is high.

[0036] As Figure 5 , Figure 6 shown, the design of the lamp housing 5 needs to match the headlight heat dissipation module M. There are installation limit holes for the light guide 7 on the lamp housing 5. The outer opening structure of the lamp housing 5 is completely matched with the designed shapes of the boss 1-3 and the sealing ring 3. Specifically, as Figure 6 shown, the sectional view can clearly show that the sealing ring 3 and the boss 1-3 protruding from the upper surface of the lamp board heat dissipation vertical main body structure 1-1 of the L-shaped radiator main body 1 are assembled, preferably by interference fit. The outer opening structure of the lamp housing 5 and the sealing ring 3 are assembled, preferably by interference or zero-clearance fit, and at the same time, the contour shapes are matched, which can ensure the sealing effect, enabling the headlight heat dissipation module M to be installed on the lamp housing 5 and achieve sealing.

[0037] In the headlight cooling module M, the fin outer contour design of the driving board cooling horizontal main structure 1-2 fully considers the shape of the lamp housing 5, enabling the driving board cooling horizontal main structure 1-2 to smoothly pass through the installation passage reserved in the lamp housing (referring to the space reserved on the lamp housing 5 with a shape similar to the outer contour of the fins, not shown in the figure) and penetrate deep into the lamp; while the design of the boss 1-3 on the lamp board cooling vertical main structure 1-1 and the sealing ring 3 is completely matched with the shape of the lamp housing 5, taking into account both the heat dissipation of the headlight cooling module M and the installation and sealing with the lamp housing 5.

[0038] The L-shaped radiator main body 1 of the heat dissipation system of the present invention takes into account the heat dissipation design of both the lamp board and the driving board, with small space occupation and high heat dissipation efficiency;

[0039] The driving board cooling horizontal main structure 1-2 located outside the lamp housing 5 can conduct heat timely and efficiently, and the system of the present invention enables more sufficient heat exchange inside and outside the lamp;

[0040] The semi-flexible printed circuit board 2 in the headlight cooling module M can achieve the functions of the main body of the lamp board PCB 2-1, the driving function of the driving board PCB 2-2, and the connection function of the flexible connection PCB 2-3 (saving structures such as wire harnesses and connectors) with only one circuit board. It has high integration, flexible space, and realizes a low-cost design with multiple functions;

[0041] The headlight cooling module M takes into account the installation and sealing with the lamp housing 5;

[0042] The cooling module M only includes four parts, that is, it includes all the functions of the functional main body, the driving main body, the heat dissipation structure, the installation structure, and the sealing structure; it has high integration, simple design, and is convenient for structural modularization.

Claims

1. A heat dissipation system for meeting the multi-functional requirements in a small space on a vehicle lamp, characterized in that: The invention comprises: an L-shaped heat sink body (1), a semi-flexible printed circuit board (2), a sealing ring (3), printed circuit board fixing screws (4), a lamp housing (5), and structural mounting fixing screws (6); The L-shaped heat sink body (1) is composed of two heat dissipation structures, namely a light board heat dissipation vertical main structure (1-1) and a drive board heat dissipation horizontal main structure (1-2). The light board heat dissipation vertical main structure (1-1) and the drive board heat dissipation horizontal main structure (1-2) are integrally cast and do not require an auxiliary mounting matching structure. The portion of the light board heat dissipation vertical main structure (1-1) that matches the sealing ring (3) is a boss (1-3), and the boss (1-3) protrudes from the upper surface of the light board heat dissipation vertical main structure (1-1). The semi-flexible printed circuit board (2) is composed of three parts, namely a light board PCB (2-1), a driver board PCB (2-2) and a flexible connection PCB (2-3). The light board PCB (2-1) is a functional body used to set an LED light source, and the driver board PCB (2-2) is a driving body used to control and input voltage and current to the light board PCB (2-1). The flexible connection PCB (2-3) connects the light board PCB (2-1) and the driver board PCB (2-2). The flexible connection PCB (2-3) retains a wiring layer for connecting lines and has toughness. The semi-flexible printed circuit board (2) is fixed on the L-shaped heat sink body (1) via printed circuit board fixing screws (4); The sealing ring (3) passes through the horizontal main structure (1-2) for heat dissipation of the driving board and is installed on the outside of the boss (1-3) structure on the vertical main structure (1-1) for heat dissipation of the lamp board of the semi-flexible printed circuit board (2); A vehicle lamp heat dissipation module M, which is composed of four parts, namely, an L-shaped heat sink body (1), a semi-flexible printed circuit board (2), a sealing ring (3), and printed circuit board fixing screws (4), is fixed to a lamp housing (5) by means of structural mounting fixing screws (6); In the vehicle lamp heat dissipation module M, the design of the fin outer contour of the drive board heat dissipation horizontal main structure (1-2) fully considers the shape of the lamp housing (5), so that the drive board heat dissipation horizontal main structure (1-2) can smoothly pass through the installation passage reserved in the lamp housing and penetrate into the lamp; and the design of the lamp board heat dissipation vertical main structure (1-1) and the sealing ring (3) completely matches the shape of the lamp housing (5), taking into account the heat dissipation of the vehicle lamp heat dissipation module M and the installation and sealing with the lamp housing (5); The headlight heat dissipation module M has its own drive circuit, and the semi-flexible printed circuit board (2) is connected via a flexible connection PCB (2-3), thereby saving structures such as wiring harnesses and connectors, and realizing a multifunctional low-cost design.

2. The heat dissipation system for the multi-functional requirements in a small space on a vehicle lamp according to claim 1, characterized in that: The L-shaped heat sink body (1) takes into account the heat dissipation design of the two major heat sources, the lamp board and the driver board, with high heat dissipation efficiency and small space occupation: The lamp board PCB (2-1) is fixed to the vertical main structure (1-1) of the lamp board heat dissipation, and the driver board PCB (2-2) is fixed to the horizontal main structure (1-2) of the driver board heat dissipation. Together, they solve the heat dissipation problems of the lamp board PCB (2-1) and the driver board PCB (2-2). The heat of the two parts shares the L-shaped radiator main body (1), realizing the heat dissipation design that takes into account the two major heat sources of the lamp board and the driver board in the same radiator. The horizontal main structure (1-2) of the driver board heat dissipation is on the outside of the lamp housing (5), and the heat dissipation efficiency is relatively high. The heat inside the lamp can be timely exported to the outside of the lamp through the L-shaped radiator main body (1), maximizing the efficiency of the radiator.

3. The heat dissipation system for the small-space multi-functional requirements on a vehicle lamp as described in claim 1, characterized in that: The vertical main structure (1-1) of the lamp board heat dissipation and the horizontal main structure (1-2) of the driver board heat dissipation are in a right-angle relationship with each other.

4. The heat dissipation system for small-space multi-functional requirements on vehicle lights according to claim 1, characterized in that: The sealing ring (3) is assembled with the boss (1-3) protruding from the upper surface of the vertical main structure (1-1) of the lamp board heat dissipation on the L-shaped radiator main body (1), which is an interference fit. The outer opening structure of the lamp housing (5) is assembled with the sealing ring (3), which is an interference or zero-clearance fit, and at the same time, the contour shapes are matched to ensure the sealing effect, enabling the vehicle lamp heat dissipation module M to be installed on the lamp housing (5) and achieving sealing.

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