Dimmable lens module heat dissipation device

Abstract

The utility model discloses a dimmable lens module heat dissipation device, which comprises a lens assembly, a cold plate, a heat dissipation plate, a fan and a driving module, and is characterized in that the lens assembly can adjust the angle of a lens; the cold plate and the lens assembly are fixed, the cold plate is provided with a first flow channel, and liquid metal is contained in the first flow channel; the heat dissipation plate is fixed to the lamp shell, and a second flow channel is formed in the heat dissipation plate; the fan blows air to the heat dissipation plate for heat dissipation; the driving module, the first flow channel and the second flow channel are communicated to form a closed-loop channel, the driving module drives the liquid metal to flow, and the pipeline connected with the second flow channel is a flexible pipe, so that the cold plate can move relative to the heat dissipation plate. A cooling medium circulates between the cold plate and the heat dissipation plate, so that the heat dissipation end is placed on one side of the shell and does not make direct contact with a light source, meanwhile, the fixed heat dissipation plate is connected with the movable cold plate through the flexible pipe, the heat dissipation plate cannot affect angle adjustment of the lens assembly, and the heat dissipation effect is good. The heat dissipation effect can be improved, and the dimming requirement of the lens module can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of lamp design, in particular to a dimmable lens module heat dissipation device. Background Art

[0002] With the rapid development of the automotive industry, car lights are also moving towards integration, high performance, intelligence, and high power. The impact of DLP, HD, ADB, and some pixel-level light sources have made car lights colorful. As a result, the power consumption of electronic components of car lights is increasing, and the heat generated is increasing and concentrated. How to design a good heat dissipation system is also an urgent problem to be solved. If the heat dissipation of the heat source is not handled well, it will seriously affect the reliability and safety of electronic components and car lights.

[0003] The main reason for the damage or failure of car lights is excessive temperature. As the power of the heat source becomes higher and higher, the heat flux density of the electronic devices inside the car lights has increased from the previous 20~30W / cm2 to more than 60W / cm2, and there is still an increasing trend. The car lights are relatively closed cavities. Even when the car is driving at high speed, the outside wind cannot enter. In addition, the overall heat flux density of the lamp cavity is high during the operation of the lamp. The current radiator and fan heat dissipation is getting closer and closer to the bottleneck, and it is becoming more and more difficult to truly achieve cooling. Although water cooling has a certain heat dissipation effect, it occupies a large volume. At present, the space of car lights is compact and increasingly miniaturized, and the application of water cooling is more limited; semiconductor refrigeration, as a new heat dissipation method, can accurately control the temperature, but its own power consumption is large, the conversion efficiency is low, and it is difficult to apply.

[0004] For the heat dissipation of the relatively closed space of the headlight, the heat generated by the heat source needs to be quickly transferred to the heat dissipation end to prevent the heat accumulation from adversely affecting the light source. Liquid metal has begun to be used in the heat dissipation field due to its low melting point, high boiling point, and high thermal conductivity. The liquid metal heat dissipation system using liquid metal as the cooling medium has a thermal conductivity far higher than that of ordinary air cooling, water cooling, and some non-metallic media, and can achieve more efficient heat transportation and diffusion.

[0005] However, for some mid-to-high-end models, the lens of the headlight lens module can usually adjust the angle, resulting in that the heat dissipation device using liquid metal in the existing technology can only be installed at the heat source end and adjust the angle together with the lens, and the heat dissipation effect is not high. Therefore, it is necessary to design a lens module heat dissipation device with better heat dissipation effect and dimming function. Utility Model Content

[0006] In order to solve the technical problem that the heat dissipation device of the lamp in the prior art can only be installed at the heat source end when used in the lens module and the angle can be adjusted together with the lens, resulting in low heat dissipation effect, the utility model provides a dimmable lens module heat dissipation device to solve the above problem.

[0007] The utility model proposes a heat dissipation device for an adjustable light lens module, comprising a lens assembly, a cold plate, a heat sink, a fan and a driving module, wherein the lens assembly can adjust the lens angle; the cold plate is fixed to the lens assembly, the cold plate is provided with a first flow channel, and the first flow channel contains liquid metal; the heat sink is fixed to a lamp housing, the heat sink is provided with a second flow channel; the fan blows air to the heat sink to dissipate heat; the driving module, the first flow channel and the second flow channel are connected to form a closed-loop channel, the driving module drives the liquid metal to flow, and the pipeline connected to the second flow channel is a flexible pipe, so that the cold plate can move relative to the heat sink.

[0008] Furthermore, the driving module is fixed on the cold plate, the inlet of the driving module is connected to the outlet of the first flow channel, the outlet of the driving module is connected to the inlet of the second flow channel, and the outlet of the first flow channel is connected to the inlet of the second flow channel.

[0009] Furthermore, the driving module includes an electrically connected electromagnetic pump and a control board, the control board and the electromagnetic pump are fixed on the cold plate by mounting buckles, and two ends of the electromagnetic pump are respectively connected to the first flow channel and the second flow channel.

[0010] Furthermore, the driving module also includes a metal connector, one end of which is connected to the outlet of the electromagnetic pump, and the flexible tube connected to the inlet of the second flow channel is fixed to the other end of the metal connector.

[0011] Furthermore, the liquid metal is a gallium-based alloy, a tin-based alloy or a zinc-based alloy.

[0012] Furthermore, the lens assembly includes a lens bracket, a light source board and a lens, the light source board and the lens are mounted on the lens bracket, and the cold plate is fixed on the light source board.

[0013] Furthermore, the light source board has a ceramic substrate in contact with the cold plate.

[0014] Furthermore, the cold plate and the light source plate are fixed by thermal grease or screwed.

[0015] Furthermore, a rubber sealing pad is provided on the outer peripheral surface of the heat dissipation plate for sealing contact with the shell.

[0016] Furthermore, the flexible tube is made of silicone material.

[0017] The beneficial effects of the utility model are:

[0018] The heat dissipation device for the dimmable lens module described in the utility model is divided into a cold plate and a heat dissipation plate. The cooling medium circulates between the cold plate and the heat dissipation plate, so that the heat dissipation end is placed on one side of the shell and is not in direct contact with the light source. At the same time, the fixed heat dissipation plate is connected to the movable cold plate through a flexible tube. The heat dissipation plate will not affect the adjustment angle of the lens assembly, which can not only improve the heat dissipation effect but also meet the dimming requirements of the lens module. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of a specific implementation of the heat dissipation device for the dimmable lens module described in the utility model;

[0021] Figure 2 It is a schematic diagram of the side of the cooling plate facing away from the light source plate of the utility model;

[0022] Figure 3 It is a schematic diagram of the side of the cooling plate facing the light source plate in the utility model;

[0023] Figure 4 It is a schematic diagram of the internal flow channel of the intercooler plate of the utility model;

[0024] Figure 5 It is a schematic diagram of the heat dissipation plate in the utility model;

[0025] Figure 6 It is a schematic diagram of the components of the drive module in the utility model.

[0026] In the figure, 1. lens, 2. lens bracket, 3. light source board, 4. cold plate, 41. first flow channel, 42. interface, 5. flexible tube, 6. heat sink, 61. second flow channel, 62. rubber sealing gasket, 7. fan, 8. drive module, 81. electromagnetic pump, 82. mounting buckle, 83. control board, 84. metal connector. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] like Figure 1-Figure 5As shown, a dimmable lens module heat dissipation device includes a lens assembly, a cold plate 4, a heat sink 6, a fan 7 and a driving module 8. The lens assembly can adjust the angle of the lens 1, specifically, the angle is adjusted in the up, down, left and right directions; the cold plate 4 is fixed to the lens assembly, and the cold plate 4 has a first flow channel 41, and the first flow channel 41 contains liquid metal; the heat sink 6 is fixed to the lamp housing, and the heat sink 6 has a second flow channel 61; the fan 7 blows air to the heat sink 6 to dissipate heat, and the fan 7 is fixed to the lamp housing; the driving module 8, the first flow channel 41 and the second flow channel 61 are connected to form a closed-loop channel, the driving module 8 drives the liquid metal to flow, and the pipeline connected to the second flow channel 61 is a flexible pipe 5, so that the cold plate 4 can move relative to the heat sink 6. The liquid metal can be a gallium-based alloy, a tin-based alloy or a zinc-based alloy. In order to prevent heat from being conducted to the inside of the shell, the connection between the heat sink 6 and the shell needs to be sealed. As a preferred embodiment, the outer peripheral surface of the heat sink 6 is provided with a rubber sealing pad 62 in sealing contact with the shell.

[0029] The lens assembly is the light source end, the cold plate 4 is in contact with the light source end, and conducts the heat of the light source. The heat sink 6 is not in direct contact with the light source, and is dissipated by the fan 7. Under the action of the driving module 8, the liquid metal can be transferred from the cold plate 4 to the heat sink 6, and the heat is quickly dissipated under the action of the fan 7. The cooled liquid metal enters the cold plate 4 again to cool the lens assembly, thereby improving the heat dissipation efficiency. At the same time, the heat sink 6 is connected to the active driving module 8 and the first flow channel 41 through the flexible tube 5. The deformability of the flexible tube 5 allows the cold plate 4 and the lens assembly to adjust the angle at will without affecting the circulation of the liquid metal, thereby realizing the dimming function.

[0030] The driving module 8 can be fixed on the cold plate 4 or on the heat sink 6. Since the liquid metal is initially located in the first flow channel 41 of the cold plate 4, the driving module 8 is preferably arranged on the cold plate 4 close to the liquid metal, so as to facilitate the rapid extraction of the liquid metal. The inlet of the driving module 8 is connected to the outlet of the first flow channel 41, the outlet of the driving module 8 is connected to the inlet of the second flow channel 61, and the outlet of the first flow channel 41 is connected to the inlet of the second flow channel 61. The pipelines connecting the outlet and the inlet of the second flow channel 61 are both flexible tubes 5. The flexible tube 5 is preferably made of silicone material.

[0031] like Figure 1 As shown, the lens assembly usually includes a lens bracket 2, a light source board 3 and a lens 1. The light source board 3 and the lens 1 are mounted on the lens bracket 2, and the cold plate 4 is fixed on the light source board 3. The lens 1 is the light output lens of the lens assembly, and can rotate in the up, down, left and right angles for dimming. The lens bracket 2 is the mounting bracket of the lens 1, and rotates with the lens 1. The light source board 3 is a PCB board where LEDs are placed to drive components. The middle is a centralized pixel light source, and under the light source is a part of the ceramic substrate, which is conducive to the rapid conduction of heat to the cold plate 4. As shown in FIG. Figure 2-Figure 4As shown, one end of the cold plate 4 is fixed to the light source board 3 by thermal grease or screwed, and the other end is provided with two interfaces 42 connected to the flexible tube 5 , and the first flow channel 41 is located inside the cold plate 4 .

[0032] like Figure 6 As shown, the driving module 8 may include, but is not limited to, an electrically connected electromagnetic pump 81 and a control board 83. The control board 83 and the electromagnetic pump 81 are fixed to the cold plate 4 by means of mounting buckles 82. The two ends of the electromagnetic pump 81 are respectively connected to the first flow channel 41 and the second flow channel 61. The control board 83 controls the start and stop of the electromagnetic pump 81 according to the surface temperature of the cold plate 4. When the micro electromagnetic pump 81 is powered on, the entire device will form a circulation system. The liquid metal in the pipeline will quickly exchange heat after passing through the rear of the light source, transport the heat to the heat sink 6, cool it down through the fan 7, and the cooled fluid will flow back to the heat source end (cold plate 4) for heat exchange. This cycle will achieve the purpose of quickly reducing the temperature of the light source.

[0033] In a further setting, since the output end of the electromagnetic pump 81 is connected to the second flow channel 61 of the heat sink 6, when the lens assembly is dimmed and rotated, the flexible tube 5 connecting the two will be deformed, and the outlet of the electromagnetic pump 81 is short, and the connection with the flexible tube 5 is not firm, and the flexible tube 5 can easily fall off from the electromagnetic pump 81. For this reason, the utility model sets a metal connector 84 in the driving module 8 to connect the outlet of the electromagnetic pump 81 with the metal connector 84, and the flexible tube 5 is sleeved on the metal connector 84 and can be fixed with tape or glue. The metal connector 84 serves as an intermediate adapter and can also adjust the size according to the shape of the outlet of the flexible tube 5 and the electromagnetic pump 81. The metal connector 84 can be improved from a simple metal tube with low manufacturing cost, and can effectively solve the problem of the flexible tube 5 falling off, thereby making the connection between the flexible tube 5 and the electromagnetic pump 81 more reliable.

[0034] The utility model utilizes the metal properties of liquid metal, such as low melting point, high boiling point and high thermal conductivity, and drives the liquid metal in the pipeline to circulate through an electromagnetic pump 81. The heat generated by the heat source is transferred to the flowing liquid through the cold plate 4. The circulating liquid transfers the heat to the heat sink 6 through the flexible tube 5, and then the heat is quickly dispersed to the outside of the lamp through forced convection by the fan 7, so that the liquid in the pipeline is cooled; the cooled liquid is driven by the electromagnetic pump 81 again to flow to the cold plate 4 attached to the light source, absorbs the heat generated by the heat source, and conducts it to the outside of the lamp through the heat sink 6 and the fan 7, and the cycle is repeated to achieve cooling and heat dissipation of the light source board 3.

[0035] The utility model can quickly and effectively reduce the temperature of the light source board 3, transfer the heat from the closed lamp to the outside of the lamp, reduce the heat accumulation in the lamp, improve the working environment of the electronic components of the lamp board in the lamp, and ensure the working life of the components in the lamp and the whole lamp. While achieving heat dissipation, the dimming of the lens 1 can be achieved, which is suitable for the development of current car lights and improves the satisfaction of customers.

[0036] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] In this specification, the schematic representation of the terms does not necessarily refer to the same embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments.

[0038] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A dimmable lens module heat dissipation device, characterized in that: include: A lens assembly, wherein the lens assembly can adjust the angle of the lens (1); A cold plate (4) is fixed to the lens assembly, the cold plate (4) having a first flow channel (41), wherein the first flow channel (41) contains liquid metal; A heat sink (6) is fixed to the lamp housing, and a second flow channel (61) is provided on the heat sink (6); A fan (7) blows air to the heat sink (6) to dissipate heat; A driving module (8), wherein the driving module (8), the first flow channel (41) and the second flow channel (61) are connected to form a closed-loop channel, the driving module (8) drives the liquid metal to flow, and the pipeline connected to the second flow channel (61) is a flexible pipe (5), so that the cold plate (4) can move relative to the heat dissipation plate (6).

2. The dimmable lens module heat dissipation device according to claim 1, characterized in that: The driving module (8) is fixed on the cold plate (4), the inlet of the driving module (8) is connected to the outlet of the first flow channel (41), the outlet of the driving module (8) is connected to the inlet of the second flow channel (61), and the outlet of the first flow channel (41) is connected to the inlet of the second flow channel (61).

3. The heat dissipation device for a dimmable lens module according to claim 2, characterized in that: The driving module (8) comprises an electrically connected electromagnetic pump (81) and a control board (83); the control board (83) and the electromagnetic pump (81) are fixed to the cold plate (4) via mounting buckles (82); and two ends of the electromagnetic pump (81) are respectively connected to the first flow channel (41) and the second flow channel (61).

4. The dimmable lens module heat dissipation device according to claim 3, characterized in that: The driving module (8) further comprises a metal connector (84), one end of which is connected to the outlet of the electromagnetic pump (81), and the flexible tube (5) connected to the inlet of the second flow channel (61) is fixed to the other end of the metal connector (84).

5. The dimmable lens module heat dissipation device according to claim 1, characterized in that: The liquid metal is a gallium-based alloy, a tin-based alloy or a zinc-based alloy.

6. The heat dissipation device for a dimmable lens module according to claim 1, characterized in that: The lens assembly comprises a lens bracket (2), a light source board (3) and a lens (1); the light source board (3) and the lens (1) are mounted on the lens bracket (2); and the cold plate (4) is fixed on the light source board (3).

7. The dimmable lens module heat dissipation device according to claim 6, characterized in that: The light source plate (3) comprises a ceramic substrate in contact with a cold plate (4).

8. The dimmable lens module heat dissipation device according to claim 6, characterized in that: The cold plate (4) and the light source plate (3) are fixed by means of thermal conductive silicone grease or screwed together.

9. The dimmable lens module heat dissipation device according to claim 1, characterized in that: The outer peripheral surface of the heat dissipation plate (6) is provided with a rubber sealing gasket (62) in sealing contact with the housing.

10. The heat dissipation device for a dimmable lens module according to claim 1, characterized in that: The flexible tube (5) is made of silicone material.

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