LED module heat dissipation structure with air duct

Abstract

The utility model discloses a kind of LED module heat dissipation structure with air duct, including radiator, it includes the radiator fin of having opposite first surface and second surface and being arranged on first surface, first through-hole is further provided on radiator substrate;Fan, it is arranged on radiator;Wind baffle, it is arranged on radiator, for limiting the wind of fan blowing in the side flow of radiating fin circulation;PCB board, it is arranged on second surface, and second through-hole is provided on it with first through-hole communication;LED, it is connected on PCB board;Lens barrel support, it is arranged on second surface, and light-transmitting hole corresponding with the position of LED and first channel communicating with second through-hole are provided on it;Lens barrel, it is arranged on support, and its inside is communicated with light-transmitting hole, and second channel and air outlet communicating its inside and first channel are provided on it, and first channel and second channel butt joint place form staggered cooperation;First lens, it is arranged in the inside of lens barrel near LED;And second lens, it is arranged in the inside of lens barrel.

Description

Technical Field

[0001] This utility model relates to the field of automotive lighting technology, specifically to a heat dissipation structure for an LED module with an air duct. Background Technology

[0002] In the field of automotive lighting technology, LEDs are being widely used in the automotive lighting industry. As optoelectronic devices, LEDs convert electrical energy into light energy during operation, with a conversion efficiency of around 30%. The remaining 70% of the electrical energy is generally converted into heat energy, causing the LED temperature to rise. This increased temperature exacerbates LED light decay and, with prolonged use, affects the LED's lifespan. Furthermore, with increasingly stringent optical requirements, the approximately 30% light energy also presents a photothermal coupling problem for LED modules. This means that the light emitted by the LED is absorbed and converted into heat energy when it shines on optical components and their surrounding support parts. This leads to performance degradation of the optical components in high-temperature environments, affecting lighting effects and potentially necessitating the use of optical components with higher temperature resistance, thus increasing costs.

[0003] Currently, conventional high-power LED module heat dissipation structures (such as heat sinks plus fans) often only focus on cooling the LEDs while neglecting the cooling of optical components, making it difficult to reduce the temperature of optical components while ensuring LED cooling. Although conventional LED module heat dissipation structures sometimes incorporate airflow designs, they often only use a single fan to cool multiple LED modules through the airflow, resulting in significant space constraints and similarly neglecting the cooling of optical components. For example, Chinese patent CN211119166U discloses a high-speed airflow cooling LED automotive light module, which includes a fan, a reflector, an LED, a PCB board, and a heat sink. The reflector is mounted on the upper end of the heat sink, and the PCB board is mounted between the heat sink and the reflector. The fan is located behind the heat sink (with the lens in front and the fan behind). A first airflow channel is formed between the PCB board, the upper end of the heat sink, and the reflector. The LED is mounted on the PCB board and placed within the first airflow channel. Multiple heat dissipation fins extend downward from the lower end of the heat sink body, and a second airflow channel is formed between adjacent heat dissipation fins. The air inlets of the first and second airflow channels face the air outlet of the fan. This high-speed airflow cooling LED automotive light module can effectively dissipate heat and prevent excessive heat accumulation. However, the high-speed airflow cooling LED automotive light module designed in this patent (CN211119166U) actually has the following drawbacks: It cools the LED by directly blowing air through the first air duct, without further designing a structure to guide the airflow to the optical components. In other words, this patent is similar to existing LED module cooling structures, focusing only on cooling the LED while neglecting the cooling of the optical components, making it difficult to simultaneously reduce the temperature of the optical components while ensuring proper LED cooling. Utility Model Content

[0004] The purpose of this invention is to address the problem that existing LED module heat dissipation structures only focus on cooling the LED while neglecting the cooling of optical components. This invention designs an LED module heat dissipation structure with air ducts that can simultaneously cool both the LED and optical components, thus solving the problem that existing LED module heat dissipation structures cannot cool the optical components. This avoids the performance degradation caused by high temperatures of the optical components.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] This utility model designs a heat dissipation structure for an LED module with an air duct, which includes the following configuration:

[0007] A heat sink includes a heat sink substrate having a first surface and a second surface opposite to each other and a plurality of heat sink fins disposed on the first surface. The heat sink substrate is also provided with a first through hole penetrating the first surface and the second surface.

[0008] A fan, which is mounted on the radiator, is used to blow air to one side of the heat dissipation fins;

[0009] A wind deflector is disposed on the radiator to restrict the flow of air blown by the fan on the heat dissipation fin side;

[0010] A PCB board is disposed on the second surface of the heat dissipation substrate, and a second through hole communicating with the first through hole is also provided thereon.

[0011] LEDs, which are electrically connected to the PCB board;

[0012] The lens barrel support is disposed on the second surface of the heat dissipation substrate, and is also provided with a light-transmitting hole corresponding to the position of the LED and a first channel communicating with the second through hole.

[0013] The lens barrel is mounted on the lens barrel support and its interior is connected to the light-transmitting hole. The outer wall of the lens barrel is also provided with a second channel connecting its interior and the first channel, as well as an air outlet. The first channel and the second channel are misaligned at their joints.

[0014] The first lens is disposed inside the lens barrel, close to the LED;

[0015] And a second lens, which is disposed inside the lens barrel, and the second channel extends between the first lens and the second lens.

[0016] Furthermore, a heat dissipation structure for an LED module with air ducts: several heat dissipation fins are vertically arranged on the first surface.

[0017] Furthermore, an LED module heat dissipation structure with an air duct is provided: the heat dissipation structure further includes a fan bracket; the fan is mounted on the heat sink via the fan bracket.

[0018] Furthermore, an LED module heat dissipation structure with an air duct: the fan is set at an angle to blow air at an angle onto the heat dissipation fins.

[0019] Furthermore, a heat dissipation structure for an LED module with an air duct: a light-blocking rib is also provided around the inner ring of the lens barrel, which is used to block part of the light that shines onto the periphery of the second lens.

[0020] Furthermore, a heat dissipation structure for an LED module with an air duct: the lens barrel is formed by splicing an upper lens barrel and a lower lens barrel.

[0021] Furthermore, a heat dissipation structure for an LED module with an air duct: the second channel is disposed in the lower lens barrel.

[0022] Furthermore, an LED module heat dissipation structure with an air duct: the air outlet is located in the upper lens barrel.

[0023] Furthermore, an LED module heat dissipation structure with an air duct is provided: the air outlet is also provided with a grille to prevent foreign objects from falling into the inside of the lens barrel.

[0024] The beneficial effects of this utility model are:

[0025] This utility model designs an LED module heat dissipation structure with air ducts, which can form two air ducts: a first air duct formed between the heat sink and the baffle plate, and a second air duct composed of a first through hole on the heat sink substrate, a second through hole on the PCB board, a first channel on the lens barrel bracket, and a second channel on the lens barrel. The air blown out by the fan mainly dissipates the heat conducted from the LED to the heat sink through the first air duct, and then guides part of the air to the inside of the lens barrel through the second air duct to dissipate heat from the first and second lenses (optical components). This achieves the function of simultaneously dissipating heat from the LED and the optical components, avoiding the performance degradation problem caused by high temperature of the optical components. The lighting effect will not be affected by the performance degradation of the optical components, and there is no need to use higher temperature resistant optical components, thus not increasing the cost.

[0026] This invention presents an LED module heat dissipation structure with integrated air ducts, which can simultaneously reduce the temperature of optical components (lenses) while ensuring heat dissipation for the LEDs, thereby guaranteeing the heat dissipation performance of the lenses and reducing lens costs. Furthermore, this invention features a staggered fit at the junction of the first and second channels, with a certain gap between them. This ensures proper dimming before and after operation and minimizes air leakage in the second air duct, thus guaranteeing effective heat dissipation for the lenses inside the lens barrel.

[0027] This utility model designs an LED module heat dissipation structure with air ducts. By optimizing the module's own structure, two air ducts are formed, which can reduce the temperature of the lens while ensuring LED heat dissipation, and also requires less space for the entire lamp.

[0028] This invention relates to an LED module heat dissipation structure with an air duct. Inside the lens barrel, light-blocking ribs are incorporated to reduce the amount of light reaching the periphery of the second lens, thus mitigating the problem of lens overheating caused by LED light. Furthermore, a grille is installed in the air outlet of the upper lens barrel to prevent foreign objects (such as screws used in the heat dissipation structure) from falling into the lens barrel and damaging the lens. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of a heat dissipation structure for an LED module with an air duct, as provided in Example 1.

[0031] Figures 2-3 This is a cross-sectional view of the heat dissipation structure of the LED module with airflow in Example 1, wherein... Figure 2 This is a cross-sectional view near the middle of the heat dissipation structure. Figure 3 This is a cross-sectional view near the side of the heat dissipation structure;

[0032] Figure 4 This is a schematic diagram of the misaligned fit between the first and second channels in Example 1. Figure 3 Enlarged view of part A in the middle;

[0033] Figure 5 This is a schematic diagram of the assembly of the radiator and the baffle in Example 1;

[0034] Figure 6 This is a schematic diagram of the assembly of the lens barrel support and the lower lens barrel in Example 1;

[0035] Figure 7 This is a schematic diagram of the assembly of the lens barrel support and the lens barrel in Example 1;

[0036] Figure 8 This is a schematic diagram of the upper lens tube in Example 1.

[0037] The markings in the image are as follows:

[0038] 1-Heat sink, 2-Fan, 3-Wind deflector, 4-PCB board, 5-LED, 6-Mirror barrel bracket, 7-Mirror barrel, 8-First lens, 9-Second lens, 10-Fan bracket, 11-Heat sink substrate, 12-Heat sink fins, 13-First through hole, 14-First surface, 15-Second surface, 41-Second through hole, 61-Light transmission hole, 62-First channel, 71-Upper mirror barrel, 72-Lower mirror barrel, 73-Second channel, 74-Air outlet, 75-Light blocking rib, 76-Grate. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0040] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," "right," "top," and "bottom," etc., indicating orientation or positional relationships, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this utility model described herein can be implemented in orders other than those illustrated or described herein.

[0041] Example 1

[0042] like Figures 1-8 As shown, this embodiment 1 designs a heat dissipation structure for an LED module with an air duct. The heat dissipation structure includes the following configuration:

[0043] The heat sink 1 includes a heat sink substrate 11 having a first surface 14 and a second surface 15 opposite to each other and a plurality of heat sink fins 12 vertically disposed on the first surface 14. The heat sink substrate 11 is also provided with a first through hole 13 penetrating the first surface 14 and the second surface 15.

[0044] Fan 2 is inclinedly mounted on the heat sink 1 via fan bracket 10. Fan 2 is used to blow air obliquely to one side of the heat sink fins 12 for heat dissipation. Specifically, fan 2 and fan bracket 10 are fixed to the heat sink 1 together with screws. The fan bracket has a fan mounting anti-misalignment structure and the fan is slightly tilted.

[0045] A wind deflector 3 is disposed on the radiator 1 to restrict the airflow from the fan 2 to one side of the heat dissipation fins 12, thereby dissipating heat.

[0046] PCB board 4 is attached to the second surface 15 of the heat dissipation substrate 11 by screws, and a second through hole 41 is provided thereon, which communicates with the first through hole 13 on the heat dissipation substrate 11.

[0047] LED5 is electrically connected to the PCB board 4;

[0048] The lens barrel bracket 6 is fastened to the second surface 15 of the heat dissipation substrate 11 by screws. It is also provided with a light-transmitting hole 61 corresponding to the position of LED 5 and a first channel 62 communicating with the second through hole 41.

[0049] The lens barrel 7 is formed by splicing an upper lens barrel 71 and a lower lens barrel 72. The lens barrel 7 is fastened to the lens barrel support 6 by screws. The interior of the lens barrel 7 is connected to the light transmission hole 61. A light-blocking rib 75 is provided around the inner ring of the lens barrel 7 to block part of the light that shines on the periphery of the second lens 9. A second channel 73 is also provided on the outer wall of the lower lens barrel 72, which connects its interior and the first channel 62. An air outlet 74 is provided on the outer wall of the upper lens barrel 71. A grille 76 is provided in the air outlet 74 to prevent foreign objects from falling into the interior of the lens barrel 7. The first channel 62 and the second channel 73 are misaligned at the joint. The locking position of the lens barrel 7 and the lens barrel support 6 is not at the misaligned joint. There is a gap between the lens barrel 7 and the lens barrel support 6.

[0050] The first lens 8 is located inside the lens barrel 7, close to the LED 5;

[0051] And a second lens 9, which is disposed inside the lens barrel 7, and the second channel 71 extends between the first lens 8 and the second lens 9.

[0052] The LED module heat dissipation structure with air ducts in Example 1 can form two air ducts (a first air duct and a second air duct) by optimizing the module's own structure. The first air duct is formed between the heat sink 1 and the baffle 3, while the second air duct is composed of a first through hole 13 on the heat sink substrate 11, a second through hole 41 on the PCB board 4, a first channel 62 on the lens barrel bracket 6, and a second channel 73 on the lens barrel 7. In the working principle of this LED module heat dissipation structure: the air blown by the fan 2 flows out from its air outlet. Part of the air enters the first air duct to dissipate the heat from the LED 5 to the heat sink 1, while the other part of the air smoothly enters the second air duct through the first through hole 13 and is blown into the interior of the lens barrel 7 to dissipate heat from the first lens 8 and the second lens 9. Finally, the air is discharged through the air outlet 74 on the upper lens barrel 71, achieving the effect of simultaneous heat dissipation of the LED and the lens, thereby effectively dissipating heat and avoiding heat accumulation that would affect the lighting effect.

[0053] The above-described preferred embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of this utility model. Any obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A heat dissipation structure for an LED module with an air duct, characterized in that, The heat dissipation structure includes the following features: The heat sink (1) includes a heat dissipation substrate (11) having opposing first surfaces (14) and second surfaces (15) and a plurality of heat dissipation fins (12) disposed on the first surface (14). The heat dissipation substrate (11) is also provided with a first through hole (13) penetrating the first surface (14) and the second surface (15). A fan (2) is disposed on the radiator (1) for blowing air to one side of the heat dissipation fins (12); A baffle plate (3) is disposed on the radiator (1) to restrict the airflow from the fan (2) to the side of the heat dissipation fins (12); PCB board (4) is disposed on the second surface (15) of the heat dissipation substrate (11), and a second through hole (41) communicating with the first through hole (13) is also disposed thereon; LED (5), which is electrically connected to the PCB board (4); The lens barrel support (6) is disposed on the second surface (15) of the heat dissipation substrate (11), and is also provided with a light-transmitting hole (61) corresponding to the position of the LED (5) and a first channel (62) communicating with the second through hole (41); The lens barrel (7) is mounted on the lens barrel support (6), and its interior is connected to the light-transmitting hole (61). The outer wall of the lens barrel (7) is also provided with a second channel (73) connecting its interior and the first channel (62) and an air outlet (74). The first channel (62) and the second channel (73) are misaligned at their joints. The first lens (8) is disposed inside the lens barrel (7) near the LED (5); And a second lens (9) disposed inside the lens barrel (7), the second channel (73) extending between the first lens (8) and the second lens (9).

2. The LED module heat dissipation structure with air duct according to claim 1, characterized in that, Several heat dissipation fins (12) are vertically arranged on the first surface (14).

3. The LED module heat dissipation structure with air duct according to claim 1, characterized in that, The heat dissipation structure also includes a fan bracket (10); the fan (2) is mounted on the heat sink (1) via the fan bracket (10).

4. The LED module heat dissipation structure with air duct according to claim 3, characterized in that, The fan (2) is tilted to blow air at an angle onto the heat dissipation fins (12).

5. The LED module heat dissipation structure with air duct according to claim 1, characterized in that, A light-blocking rib (75) is also provided around the inner ring of the lens barrel (7) to block part of the light that shines on the periphery of the second lens (9).

6. The LED module heat dissipation structure with air duct according to claim 1, characterized in that, The lens tube (7) is formed by splicing together an upper lens tube (71) and a lower lens tube (72).

7. The LED module heat dissipation structure with air duct according to claim 6, characterized in that, The second channel (73) is disposed in the lower lens tube (72).

8. The LED module heat dissipation structure with air duct according to claim 6, characterized in that, The air outlet (74) is located in the upper lens tube (71).

9. A heat dissipation structure for an LED module with an air duct according to claim 1 or 8, characterized in that, The air outlet (74) is also provided with a grille (76) to prevent foreign objects from falling into the inside of the lens barrel (7).

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