LED light source module radiator

Abstract

The utility model discloses a light-emitting diode (LED) light source module radiator which comprises a first radiating plate, a light source module is installed on one face of the first radiating plate, the two sides of the non-installation face of the first radiating plate symmetrically extend towards the side back to the light source module to form second radiating plates respectively, and the tail ends of the two second radiating plates are connected through a third radiating plate. The two sides of the runner are provided with openings, and the cross section is quadrilateral; a plurality of heat dissipation cutting grooves are milled in the direction from the outer surface of the third heat dissipation plate to the first heat dissipation plate, and the heat dissipation cutting grooves cut into the second heat dissipation plate in the extending direction of the second heat dissipation plate and do not extend to the connecting position of the second heat dissipation plate and the first heat dissipation plate. According to the radiator, a heat dissipation network is formed through the flow channels, the cutting grooves and the fins with the gradually-changed thicknesses, and the heat dissipation problem of an LED module under the high heat density condition is effectively solved; and in combination with the function of an elastic clamping piece, the heat dissipation performance, the structure light weight and the installation efficiency are synchronously improved, and the application scene is expanded.

Description

TECHNICAL FIELD

[0001] The utility model relates to LED lighting technical field, especially a kind of LED light source module radiator. BACKGROUND

[0002] With the rapid development of LED lighting technology, the requirement of high-power LED module to heat dissipation performance is increasingly stringent. As a core thermal management component, the design of the radiator directly affects the light source life and light efficiency stability.

[0003] In the prior art, the common LED radiator mainly dissipates heat through the following ways: 1. Extending multiple groups of parallel or radial heat fins on the back of the first heat sink, and dissipating heat by natural convection or forced air cooling. Although this structure can provide a large heat dissipation area, the narrow gap between the fins can easily cause airflow obstruction, reducing convection efficiency. If the gap is too wide, the structural strength will be weakened, and the overall volume will be large, making it difficult to adapt to compact lamps. 2. Using U-shaped or semi-enclosed flow channel design to enhance heat dissipation through limited air circulation, but the flow channel has small cross-sectional area and high flow resistance. In passive heat dissipation mode, hot air is severely trapped, making it difficult to form a stable convection path. On the other hand, the rigid materials commonly used in traditional bird spikes lack elasticity and can easily come loose under vibration or external force, making it difficult to maintain cable fixation for a long time. Some bird spikes need to be installed through screws or adhesives, which is tedious and requires a high installation space, making it difficult to achieve quick disassembly and assembly. SUMMARY

[0004] In view of the shortcomings and deficiencies of the prior art, the utility model aims to provide a LED radiator that balances high-efficiency heat dissipation, structural reliability and low manufacturing cost.

[0005] The specific technical solution of the utility model is as follows:

[0006] The utility model provides a kind of LED light source module radiator, including the first heat sink of the light source module of one side installation, the non-installation side of the first heat sink is symmetrically extended to the side opposite to the light source module respectively to form second heat sink, the end of two second heat sinks is connected by a third heat sink, and forms the flow channel with quadrilateral cross section with two side openings;A plurality of heat dissipation grooves are milled from the outer surface of the third heat sink towards the first heat sink direction, the heat dissipation grooves are cut into the interior along the extension direction of the second heat sink, and do not extend to the connection between the second heat sink and the first heat sink.

[0007] In one preferred technical solution, the axis of the heat dissipation groove forms an angle of 60° to 90° with the plane of the first heat sink, and the heat dissipation groove is a straight groove, a wavy groove or a broken line groove.

[0008] A preferred technical solution, the heat dissipation cut slot width is 0.5-2cm, the adjacent heat dissipation cut slot spacing is 5-10cm, the heat dissipation cut slot along the second heat dissipation plate length direction extension size is the total length of the second heat dissipation plate 1 / 2 to 5 / 6.

[0009] Another preferred technical solution, the quadrilateral cross section is isosceles trapezoidal structure, two second heat dissipation plates are two isosceles trapezoidal waists, the third heat dissipation plate is the short side of the isosceles trapezoidal, the heat dissipation cut slot is a straight slot penetrating the third heat dissipation plate and partially cutting into the second heat dissipation plate along the cross section direction, and the extension direction of the straight slot is perpendicular to the first heat dissipation plate plane.

[0010] A preferred technical solution, on the outer surface of the second heat dissipation plate, along the direction from the end close to the first heat dissipation plate to the end away from the first heat dissipation plate, a plurality of strip-shaped heat dissipation fins parallel to the connecting edge of the second heat dissipation plate and the first heat dissipation plate are arranged in sequence; the height of each heat dissipation fin gradually increases along the arrangement order from the end close to the first heat dissipation plate to the end away from the first heat dissipation plate.

[0011] Further, the inclination angle of the side edge of the second heat dissipation plate and the first heat dissipation plate plane is α, the height increment between adjacent heat dissipation fins is equal to the height reduction of the second heat dissipation plate due to the inclination angle α in the same horizontal spacing, so that the top end connecting line of all the heat dissipation fins forms a vertical extension plane perpendicular to the first heat dissipation plate plane.

[0012] A preferred technical solution, the third heat dissipation plate is distributed with a plurality of parallel arranged second heat dissipation fins, the second heat dissipation fin is perpendicular to the heat dissipation cut slot, and the height of the second heat dissipation fin is 1-3mm.

[0013] The second aspect of the improvement of the heat dissipation structure of the utility model, at least one pair of axis collinear clamping holes are set up on the third heat dissipation plate, the heat dissipation device further includes elastic clamping piece, the elastic clamping piece is integrally bent by wire, and the elastic clamping piece includes

[0014] The circle type torsional spring in the middle part;

[0015] The first supporting leg and the second supporting leg are symmetrically spread out in opposite directions from the two ends of the circle type torsional spring, the U-shaped clamping part is formed at the end of each supporting leg, and the strip-shaped thorn part extends from the free end of the U-shaped clamping part towards the direction away from the center of the circle type torsional spring.

[0016] Among them, the U-shaped clamping part and the clamping hole form a two-way axial clamping fit, and the strip-shaped thorn part is distributed on the periphery of the third heat dissipation plate.

[0017] Preferably, the outward extensions of the first and second legs extending from both ends of the coiled torsion spring form an angle β, wherein the angle β satisfies: 30°≤β≤150°; and the strip-shaped bird spikes of the first and second legs form an outward extension angle θ, wherein the angle θ satisfies: 30°≤θ≤120°.

[0018] Preferably, the diameter of the metal wire is 1.2 mm to 3.0 mm, and the length of the strip-shaped bird barb is 10-25 cm.

[0019] Based on the above-mentioned inventive principles, the beneficial effects of this utility model are as follows:

[0020] This utility model of LED light source module heat sink significantly improves heat dissipation effect, specifically by improving heat dissipation efficiency in the following aspects: a heat dissipation groove is set on the quadrilateral outer frame of the flow channel, the groove penetrates the third heat sink and partially cuts into the second heat sink, forming a local thermal bridge perpendicular to the first heat sink, shortening the path of heat transfer from the first heat sink to the third heat sink, and accelerating the lateral diffusion of heat; the groove forms a segmented airflow channel in the third and second heat sinks, when hot air rises in natural convection, cold air is drawn in from the bottom of the groove, forming a chimney effect, forcing airflow circulation, and breaking the original thermal boundary layer stagnation.

[0021] The gradient fin height design of the second heat sink has the following advantages: 1. It allows the fin height to adapt to changes in airflow. At the near end, the lower fins reduce flow resistance when airflow speed is low; at the far end, the higher fins maintain effective convective heat transfer even after airflow acceleration. 2. Synergistic effect with the slots: The vertical airflow of the slots and the vertical plane of the gradient fins form a continuous convection path, accelerating the airflow upwards along the fin height direction, thus improving heat dissipation efficiency. 3. The fins of both the third and second heat sinks are perpendicular to the slots, increasing surface area while maintaining structural stability.

[0022] This utility model's LED light source module heat sink structure achieves both stability and lightweight design. The milled grooves reduce weight, and the heat dissipation grooves are perpendicular to the fins of the second and third heat dissipation plates, better maintaining overall rigidity. Furthermore, the bird spike elastic clip achieves bidirectional axial fixation through a torsion spring and a U-shaped locking part, avoiding the stress concentration problem of traditional bolt fixing. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of one embodiment of the LED light source module heat sink of this utility model;

[0024] Figure 2a , Figure 2b This is a schematic diagram of two forms of the heat dissipation groove of this utility model;

[0025] Figure 3This is a schematic diagram of the second embodiment of the LED light source module heat sink of this utility model;

[0026] Figure 4 This is a schematic diagram of the third embodiment of the LED light source module heat sink of this utility model;

[0027] Figure 5 This is a schematic diagram of the elastic clip of this utility model. Detailed Implementation

[0028] The LED light source module heat sink provided by this utility model forms a heat dissipation network through flow channels, grooves and fins with varying thickness, which effectively solves the heat dissipation problem under the high heat density of LED modules; it also combines the function of flexible clips to achieve simultaneous improvement in heat dissipation performance, structural lightweighting and installation efficiency, thus expanding the application scenarios.

[0029] The following embodiments further illustrate the content of this utility model, but should not be construed as limiting the utility model. Any modifications or substitutions made to the methods, steps, or conditions of this utility model without departing from its spirit and essence are within the scope of this utility model.

[0030] refer to Figure 1 This invention illustrates one embodiment of the LED light source module heat sink, comprising a first heat sink 20 on one side for mounting a light source module 1, and second heat sinks 21 and 21' extending symmetrically from the non-mounting side of the first heat sink 20 toward the side opposite to the light source module, respectively. The ends of the two second heat sinks 21 and 21' are connected by a third heat sink 22 to form a flow channel with a quadrilateral cross-section and openings on both sides. Multiple heat dissipation grooves 23 are milled from the outer surface of the third heat sink 22 toward the first heat sink 20. The heat dissipation grooves 23 cut into the interior of the second heat sinks 21 and 21' along their extension direction, but do not extend to the connection between the second heat sinks 21 and 21' and the first heat sink 20.

[0031] In this design, the heat dissipation groove 23 not only exists on the surface of the third heat sink but also extends inward into the interior of the second heat sinks 21 and 21'. Although the heat dissipation groove 23 penetrates deep into the second heat sinks 21 and 21', it does not reach the connection point between the second heat sinks 21 and 21' and the first heat sink 20; that is, the end of the groove maintains a certain distance from the connection point. The connection point between the second heat sinks 21 and 21' and the first heat sink 20 bears the superposition of installation stress and thermal stress, making it a mechanically weak point. The heat dissipation groove 23 terminates in front of the connection point, avoiding the risk of stress concentration caused by slotting in this area. At the same time, the ungrooved area maintains the continuous cross-section of the second heat sink, ensuring overall bending stiffness.

[0032] The first heat sink 20 serves as the direct support for the LED light source module 1, and its overall planar design ensures the flatness of the light source contact surface. The second heat sinks 21 and 21' extend from both sides of the first heat sink 20, forming the side walls of a quadrilateral flow channel. Their ends are connected to the third heat sink 22, ultimately forming the flow channel. The heat dissipation groove 23, through milling, forms multiple segments between the third heat sink 22 and the second heat sinks 21 and 21', creating localized thermal bridges perpendicular to the first heat sink. This shortens the path of heat transfer from the first heat sink to the third heat sink, accelerating lateral heat diffusion. This increases the number of airflow channels while simultaneously reducing the overall weight of the heat sink. The axis of the heat dissipation groove 23 forms an angle of 60° to 90° with the plane of the first heat sink 20, and the tangent axis 23 is inclined or perpendicular to the first heat sink 20, such as forming an angle of 85° ± 5°.

[0033] Based on the fundamental principle of setting heat dissipation grooves to improve heat dissipation efficiency, the heat dissipation grooves can be set into various forms according to actual conditions. In some examples, the heat dissipation groove 23 is a straight groove, a wavy groove, or a zigzag groove, etc. (See reference...) Figure 2a , Figure 2b Specific limitations include wavy grooves with a wavelength of 3~8mm or zigzag grooves with a bend angle of 100°~130°.

[0034] By limiting parameters to ensure a balance between heat dissipation area and structural strength, the width of the heat dissipation groove 23 is 0.5~2cm, and the spacing between adjacent heat dissipation grooves 23 is 5~10cm; the extension dimension of the heat dissipation groove 23 along the length direction of the second heat dissipation plate 21, 21' is 1 / 2 to 5 / 6 of the total length of the second heat dissipation plate 21, 21', and the ends of the second heat dissipation plate 21, 21' corresponding to the heat dissipation groove positions have a certain length, which can avoid stress concentration at the end of the groove and extend the service life.

[0035] In a specific embodiment, the quadrilateral cross-section can be any regular or regular quadrilateral. In a preferred embodiment of this utility model, the quadrilateral cross-section is an isosceles trapezoid, the two second heat dissipation plates 21 and 21' are the two legs of the isosceles trapezoid, the third heat dissipation plate 22 is the short side of the isosceles trapezoid, and the heat dissipation groove 23 is a straight groove that penetrates the third heat dissipation plate 22 along the cross-sectional direction and partially cuts into the second heat dissipation plates 21 and 21', the extension direction of the straight groove is perpendicular to the plane of the first heat dissipation plate 20.

[0036] refer to Figure 3On the outer surface of the second heat sinks 21 and 21', a plurality of strip-shaped heat dissipation fins 30 are arranged sequentially along the direction from the end near the first heat sink 20 to the end away from the first heat sink 20, parallel to the connecting edge of the second heat sinks 21 and 21' and the first heat sink 20. The height of each heat dissipation fin 30 gradually increases from the end near the first heat sink 20 to the end away from the first heat sink 20, meaning that the fin height increases as it moves away from the first heat sink 20. At the near-end low fins: when the airflow velocity is low, the low fins reduce flow resistance; at the far-end high fins: after the airflow accelerates, the higher fins can still maintain effective convective heat transfer.

[0037] The inclination angle between the sides of the second heat sinks 21 and 21' and the plane of the first heat sink 20 is α. The height increment between adjacent heat sink fins 30 is equal to the height reduction of the second heat sinks 21 and 21' within the same horizontal distance due to the inclination angle α. This results in the top line of all the heat sink fins 30 forming a vertically extending plane perpendicular to the plane of the first heat sink 20. The vertically extending planes on both sides, the plane of the first heat sink 20, and the outer surface of the third heat sink 22 together form a rectangular cross-section flow channel. The arrangement rule of the heat sink fins 30 is that the height difference (increment) between adjacent fins is equal to the height reduction of the second heat sinks 21 and 21' due to the inclination angle α. This results in the top line of all the fins forming a vertical plane, creating a cuboid structure. This ensures aesthetics and facilitates the arrangement and installation of multi-light source modules. At the same time, the large area of ​​the heat sink fins 30 undoubtedly greatly increases the heat dissipation area.

[0038] The third heat sink 22 has a plurality of parallel second heat sink fins 25, the second heat sink fins 25 being perpendicular to the heat sink groove 23, and the height of the second heat sink fins 25 being 1~3mm.

[0039] The second improvement of this utility model in the radiator structure is described in reference to... Figure 4 and Figure 5 The third heat sink 22 has at least one pair of collinear snap-fit ​​holes 40 and 40'; the heat sink also includes an elastic clip 50, which is integrally bent from metal wire, eliminating the need for welding or assembly and simplifying the manufacturing process. The elastic clip 50 includes:

[0040] The coiled torsion spring 51 is located in the middle;

[0041] The first leg 52 and the second leg 53 extend symmetrically outward from both ends of the coiled torsion spring 51 in opposite directions. The ends of each leg are folded back to form a U-shaped locking part. Strip-shaped bird spikes 55 and 55' extend from the free end of the U-shaped locking part toward the direction away from the center of the coiled torsion spring 51.

[0042] The U-shaped snap-fit ​​part and the snap-fit ​​hole 40 form a bidirectional axial snap-fit ​​engagement, and the strip-shaped bird spikes 55 and 55' are distributed around the periphery of the third heat sink. Here, "bidirectional axial snap-fit" refers to bidirectional fixation along the axial direction of the hole, achieving a bidirectional anti-disengagement engagement between the U-shaped snap-fit ​​part and the snap-fit ​​hole in the axial direction; that is, the snap-fit ​​part cannot move along the axial direction of the hole after installation, ensuring stability. The coiled torsion spring 51 and the elastic metal wire provide continuous clamping force, ensuring long-term contact and connection with the snap-fit ​​hole in the installed state.

[0043] The first leg 52 and the second leg 53 form an angle β with their outward extensions from both ends of the coiled torsion spring 51. The angle β satisfies: 30°≤β≤150°. The strip-shaped bird spikes 55 and 55' of the first leg 52 and the second leg 53 form an outward angle θ with the angle θ satisfying: 30°≤θ≤120°. This ensures the contact pressure between the U-shaped locking part and the locking hole while preventing bird attacks.

[0044] The diameter of the metal wire is 1.2 mm to 3.0 mm, providing sufficient elastic modulus to maintain the clamping force; the length of the strip-shaped bird spikes 55, 55' is 10-25 cm. The two strip-shaped bird spikes 55, 55' can be the same or different in length.

[0045] In use, simply snap the U-shaped snap-fit ​​parts of the elastic clip 50 into the snap-fit ​​holes 40 and 40' respectively. This structure facilitates quick installation. The U-shaped snap-fit ​​parts and the collinear snap-fit ​​holes 40 on the heat sink form a bidirectional axial lock, preventing the elastic clip 50 from shifting axially due to vibration or thermal expansion and contraction.

[0046] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the device embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0047] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An LED light source module heat sink, comprising a first heat sink plate for mounting a light source module, characterized in that, The non-mounting surface of the first heat dissipation plate is symmetrically extended to the side opposite to the light source module to form a second heat dissipation plate, the ends of the two second heat dissipation plates are connected by a third heat dissipation plate to form a flow channel with a quadrilateral cross section and an open side; a plurality of heat dissipation grooves are milled from the outer surface of the third heat dissipation plate towards the first heat dissipation plate, the heat dissipation grooves are cut into the second heat dissipation plate along the extension direction of the second heat dissipation plate, and do not extend to the connection between the second heat dissipation plate and the first heat dissipation plate.

2. The LED light source module heat sink of claim 1, wherein, The axis of the heat dissipation groove forms an angle of 60°-90° with the plane of the first heat dissipation plate, and the heat dissipation groove is a straight groove, a wavy groove or a broken line groove.

3. The LED light source module heat sink of claim 1, wherein, The width of the heat dissipation groove is 0.5-2 cm, the distance between adjacent heat dissipation grooves is 5-10 cm, and the extension size of the heat dissipation groove along the length direction of the second heat dissipation plate is 1 / 2-5 / 6 of the total length of the second heat dissipation plate.

4. The LED light source module heat sink of claim 1, wherein, The quadrilateral cross section is in the form of an isosceles trapezoid, the two second heat dissipation plates are the two legs of the isosceles trapezoid, the third heat dissipation plate is the short side of the isosceles trapezoid, the heat dissipation groove is a straight groove that penetrates the third heat dissipation plate and partially cuts into the second heat dissipation plate along the cross section direction, and the extension direction of the straight groove is perpendicular to the plane of the first heat dissipation plate.

5. The LED light source module heat sink of claim 4, wherein, On the outer surface of the second heat dissipation plate, a plurality of strip-shaped heat dissipation fins parallel to the connecting edge of the second heat dissipation plate and the first heat dissipation plate are arranged in order from the end close to the first heat dissipation plate to the end away from the first heat dissipation plate; the height of each heat dissipation fin gradually increases from the end close to the first heat dissipation plate to the end away from the first heat dissipation plate.

6. The LED light source module heat sink of claim 5, wherein, The inclination angle of the side edge of the second heat dissipation plate and the plane of the first heat dissipation plate is α, and the height increment between adjacent heat dissipation fins is equal to the height reduction of the second heat dissipation plate due to the inclination angle α within the same horizontal distance, so that the top end connecting line of all the heat dissipation fins forms a vertical extension plane perpendicular to the plane of the first heat dissipation plate.

7. The LED light source module heat sink of claim 4, wherein, The third heat dissipation plate is provided with a plurality of second heat dissipation fins arranged in parallel, the second heat dissipation fins are perpendicular to the heat dissipation grooves, and the height of the second heat dissipation fins is 1-3 mm.

8. The LED light source module heat sink of claim 1, wherein, At least one pair of clamping holes with coaxial axes are provided on the third heat dissipation plate; the heat sink further comprises an elastic clamping piece which is integrally bent by wire, the elastic clamping piece comprises a coil-type torsion spring in the middle; first and second legs symmetrically extended outward from both ends of the coil-type torsion spring in opposite directions, the ends of each leg are folded to form a U-shaped clamping part, and a strip-shaped thorn part extends from the free end of the U-shaped clamping part towards the center away from the coil-type torsion spring; wherein the U-shaped clamping part and the clamping hole form a two-way axial clamping fit, and the strip-shaped thorn part is distributed on the periphery of the third heat dissipation plate.

9. The LED light source module heat sink of claim 8, wherein, The first leg and the second leg form an opening angle β with the outward extension section from both ends of the coil-type torsion spring, and the opening angle β satisfies: 30°≤β≤150°; the strip-shaped thorn part between the first leg and the second leg forms an unfolding angle θ, and the unfolding angle θ satisfies: 30°≤θ≤120°.

10. The LED light source module heat sink of claim 8, wherein, The diameter of the wire is 1.2mm to 3.0mm, and the length of the strip-shaped barb is 10-25cm.

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