A heat sink for LEDs

Abstract

The utility model discloses a radiator for LED, including radiator body, be equipped with the abutment surface on the radiator body, be equipped with a plurality of ventilation flutes that transverse through the radiator body in the radiator body, and the transverse both ends of radiator body are connected with the baffle, be equipped with the connecting portion on the baffle, the side that radiator body is away from the abutment surface is equipped with the exhaust groove, be equipped with the air inlet hole on the baffle, through setting up a plurality of transverse ventilation flutes in the radiator body, and cooperate the air inlet hole on the baffle and the exhaust groove of the side that is away from the abutment surface, form the definite air flow channel. The heat generated when LED module works is conducted to the ventilation flutes, heats the air in the groove, and the hot air is discharged through the exhaust groove due to expansion pressure rise, simultaneously, the outside cold air is continuously supplemented into the ventilation flutes through the air inlet hole on the baffle, forms the stable natural convection circulation, and the heat dissipation efficiency is improved significantly, and the active cooling device such as fan does not need additional configuration, reduces the energy consumption and the noise.

Description

Technical Field

[0001] This utility model relates to the field of lamp heat sink technology, and in particular to a heat sink for LEDs. Background Technology

[0002] With the rapid development of LED technology, LED light sources have been widely used in lighting, displays, backlighting, automotive lighting, and various special lighting fields due to their advantages such as high luminous efficiency, long lifespan, energy saving, and environmental friendliness. However, LEDs generate a large amount of heat during operation. If this heat cannot be dissipated effectively and in a timely manner, it will cause the junction temperature of the LED chip to rise, leading to problems such as accelerated light decay, color temperature drift, shortened lifespan, and even device failure. Therefore, an efficient and reliable heat dissipation structure is crucial for ensuring the performance stability and long-term reliability of LED modules.

[0003] Currently, common LED heat dissipation methods mainly include natural convection cooling, forced air cooling, and heat pipe / vapor chamber-assisted cooling. Among them, natural convection cooling is widely used in small and medium power LED lighting fixtures due to its advantages such as simple structure, no noise, and maintenance-free operation. Traditional natural convection heat sinks are mostly made of extruded aluminum profiles, with dense heat dissipation fins on the heat sink body to increase the heat dissipation area, relying on natural airflow to remove heat. However, this type of structure has the following shortcomings: First, the heat dissipation path is singular, mainly relying on surface radiation and convection, making it difficult for internal heat to be quickly conducted to the far end of the fins; second, the airflow path is unclear, easily forming local thermal stagnation zones, affecting the overall heat dissipation efficiency.

[0004] In recent years, some improvement solutions have attempted to create through holes or channels inside the radiator to guide airflow, but they often fail to fully consider the airflow intake and exhaust coordination mechanism, resulting in hot air not being effectively exhausted and cold air not being replenished, which weakens the natural convection effect.

[0005] This utility model is based on the above-mentioned circumstances. Utility Model Content

[0006] This invention overcomes the shortcomings of the prior art and provides a heat sink for LEDs with high heat dissipation efficiency.

[0007] This utility model is achieved through the following technical solution:

[0008] An LED heat sink includes a heat sink body with a contact surface for abutting an LED module. Multiple transverse ventilation slots are provided within the heat sink body corresponding to the contact surface to transfer heat from the LED module during operation to the ventilation slots. Baffles are connected to both transverse ends of the heat sink body to shield the ends of the ventilation slots. The baffles have outwardly extending connecting portions for mounting the LED module. An exhaust slot, communicating with the ventilation slots, is provided on the side of the heat sink body away from the contact surface, allowing heated and pressurized air in the ventilation slots to be discharged. An air inlet, communicating with the ventilation slots, is provided on the baffles to replenish air to the ventilation slots when air is discharged.

[0009] As described above, in an LED heat sink, the connecting part includes a connecting plate connected to a baffle. The connecting plate includes a bent section and a straight section. One end of the bent section is connected to the baffle, and the other end of the bent section is connected to the straight section. A groove is provided between the bent section and the baffle.

[0010] As described above, the flat section of the LED heat sink has mounting holes for installation.

[0011] As described above, the heat sink for LEDs has wiring holes on the contact surface for LED module wiring.

[0012] As described above, in an LED heat sink, the heat sink body has a wire outlet hole communicating with a wiring hole on the side away from the contact surface.

[0013] As described above, in an LED heat sink, the exhaust groove extends longitudinally through the heat sink body.

[0014] As described above, in an LED heat sink, there are two exhaust slots, which are respectively located on both sides of the wire outlet hole.

[0015] As described above, a heat sink for LEDs has a wave-shaped first heat dissipation surface on the circumferential outer wall of the heat sink body.

[0016] In one of the LED heat sinks described above, one or more of the ventilation slots have a wavy second heat dissipation surface on the inner sidewall near the contact surface.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] This invention creates a clear airflow channel by incorporating multiple horizontally penetrating ventilation slots within the heat sink body, along with an exhaust slot on the side away from the contact surface and air inlets on the baffle. Heat generated by the LED module during operation is conducted into the ventilation slots, heating the air inside. The hot air expands and increases in pressure before being discharged through the exhaust slots. Simultaneously, external cool air continuously enters the ventilation slots through the air inlets on the baffle, forming a stable natural convection circulation. This significantly improves heat dissipation efficiency, eliminating the need for additional active cooling devices such as fans, thus reducing energy consumption and noise.

[0019] The baffle not only seals the ends of the ventilation slot and guides airflow, but also features an integrated outward-extending connecting part for direct fixing and mounting of LED modules. This design organically combines heat dissipation with the mounting structure, eliminating the need for independent brackets or mounting accessories in traditional solutions, simplifying the assembly process, and improving the overall structural compactness and reliability.

[0020] The contact surface is in close contact with the LED module, ensuring rapid heat transfer to the heat sink body. Ventilation slots are positioned corresponding to the contact surface, allowing heat to be quickly transferred to the air within the slots, shortening the heat conduction path, reducing thermal resistance, and preventing localized overheating. The exhaust slot is located on the side of the heat sink body away from the heat source, with the air inlet located on a baffle plate. This creates a pressure difference between the exhaust slot and the intake slot, effectively preventing hot air backflow or stagnation, ensuring continuous air renewal within the ventilation slots, and maintaining a good heat dissipation environment. Attached Figure Description

[0021] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0022] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 ;

[0024] Figure 3 This is a schematic diagram of the structure of this utility model. Figure 3 ;

[0025] Figure 4 This is an exploded view of the present invention;

[0026] Figure 5 This is a cross-sectional schematic diagram of the present invention;

[0027] Figure 6 This is a schematic diagram of the end face of one embodiment of the radiator body in this utility model. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings:

[0029] like Figures 1 to 6 The LED heat sink shown includes a heat sink body 1. The heat sink body 1 has an abutment surface 11 for abutting an LED module. The heat sink body 1 has a plurality of horizontal ventilation slots 2 corresponding to the abutment surface 11, so that the heat of the LED module during operation can be transferred to the ventilation slots 2. The two horizontal ends of the heat sink body 1 are connected to baffles 3 for blocking the two ends of the ventilation slots 2. The baffles 3 have outwardly extending connecting parts 4 for installing LED modules. The side of the heat sink body 1 away from the abutment surface 11 has an exhaust slot 5 that communicates with the ventilation slots 2 so that the air in the ventilation slots 2 is heated and pressurized and discharged. The baffles 3 have air inlets 6 that communicate with the ventilation slots 2 so that when the air in the ventilation slots 2 is discharged, air is supplied to the ventilation slots 2.

[0030] This invention forms a natural convection channel by setting a horizontally penetrating ventilation slot 2 inside the heat sink body 1, and combining it with the air inlet 6 on the baffle 3 and the exhaust slot 5 on the side away from the heat source: the heat from the LED module is quickly introduced into the ventilation slot 2 through the contact surface 11, heated and then discharged under pressure, while external cold air is simultaneously replenished from the air inlet 6, achieving efficient passive heat dissipation; the baffle 3 has the functions of sealing the airflow, guiding ventilation and installing the LED module, and its one-piece molded connecting part 4 eliminates the need for an independent bracket, simplifying assembly and improving structural compactness and reliability; the ventilation slot 2 is arranged directly opposite the contact surface 11, shortening the heat conduction path, and the front and rear pressure difference design prevents hot air backflow, ensuring a continuous and stable heat dissipation effect.

[0031] Furthermore, the exhaust slot 5 extends longitudinally through the radiator body 1, thereby connecting all the ventilation slots 2.

[0032] In some embodiments, the baffle 3 can be connected to the radiator body 1 by other connection methods such as welding or threaded fasteners.

[0033] In some embodiments, the connecting portion 4 includes a connecting plate connected to the baffle 3. The connecting plate includes a bent section 41 and a straight section 42. One end of the bent section 41 is connected to the baffle 3, and the other end of the bent section 41 is connected to the straight section 42. A groove 43 is provided between the bent section 41 and the baffle 3. The groove 43 is specifically designed to accommodate or avoid lenses or other protruding optical components at the edge of the LED module, preventing structural interference during installation that could lead to failure to fit or damage to the lens. The connecting portion 4 is rigidly connected to the baffle 3 via the bent section 41, and then extends to the straight section 42 as a mounting surface, forming a stable support structure. This structure not only provides sufficient installation strength but also effectively disperses vibrations or thermal stresses generated by the LED module during use, improving overall mechanical reliability.

[0034] Furthermore, the straight section 42 is provided with mounting holes 421 for installation. The LED module can be fixed by threaded fasteners that fit into the mounting holes 421. Furthermore, a boss can be provided on the straight section 42, and the mounting holes 421 are located on the boss. The baffle 3, the bent section 41, and the straight section 42 are all integral structures.

[0035] In some embodiments, the contact surface 11 is provided with a wiring hole 111 for LED module wiring. The heat sink body 1 is provided with an outlet hole 112 communicating with the wiring hole 111 on the side away from the contact surface 11, thereby facilitating the wiring of the LED module.

[0036] Furthermore, there are two exhaust slots 5, each located on one side of the outlet hole 112. The two exhaust slots 5 are symmetrically distributed on both sides of the outlet hole 112, forming a balanced hot air flow channel and preventing airflow deviation or localized heat accumulation caused by unilateral exhaust. Hot air, heated from the ventilation slot 2, is simultaneously and smoothly discharged along the two exhaust slots 5, enhancing natural convection and improving overall heat dissipation efficiency. The dual exhaust slots 5, in conjunction with the air inlet holes 6 on the baffle 3, guide the air within the ventilation slot 2 to form a more stable and symmetrical flow pattern, reducing airflow turbulence, backflow, or stagnation areas, making the temperature field inside the entire heat sink more uniform and contributing to the consistent temperature rise of each light-emitting unit in the LED module.

[0037] In some embodiments, a wavy first heat dissipation surface 100 is provided on the circumferential outer sidewall of the radiator body 1. A wavy second heat dissipation surface 101 is provided on the inner sidewall of one or more of the ventilation slots 2 near the abutment surface 11.

[0038] The wave-shaped structure significantly increases the surface area per unit volume through periodic undulations. The first heat dissipation surface 1 enhances the heat exchange capacity between the outer surface of the heat sink and the ambient air, strengthening natural convection and radiation heat dissipation; the second heat dissipation surface 101 directly faces the hot air flow area inside the ventilation slot 2, so that the heat conducted from the LED module to the wall of the ventilation slot 2 can be transferred to the flowing air more efficiently, improving the internal convection heat transfer efficiency.

Claims

1. A heat sink for LEDs, characterized in that: The device includes a heat sink body (1), which has a contact surface (11) for contacting the LED module. The heat sink body (1) has multiple horizontal ventilation slots (2) corresponding to the contact surface (11) so that the heat from the LED module can be transferred to the ventilation slots (2). The heat sink body (1) has baffles (3) at both ends of the horizontal direction for blocking the two ends of the ventilation slots (2). The baffles (3) have connecting parts (4) extending outward for installing the LED module. The side of the heat sink body (1) away from the contact surface (11) has an exhaust slot (5) that communicates with the ventilation slots (2) so that the air in the ventilation slots (2) is heated and pressurized before being discharged. The baffles (3) have air inlets (6) that communicate with the ventilation slots (2) so that the air in the ventilation slots (2) is replenished when the air in the ventilation slots (2) is discharged.

2. The heat sink for LEDs according to claim 1, characterized in that: The connecting part (4) includes a connecting plate connected to the baffle (3). The connecting plate includes a bent section (41) and a straight section (42). One end of the bent section (41) is connected to the baffle (3), and the other end of the bent section (41) is connected to the straight section (42). A groove (43) is provided between the bent section (41) and the baffle (3).

3. The heat sink for LEDs according to claim 2, characterized in that: The straight section (42) is provided with mounting holes (421) for installation.

4. The heat sink for LEDs according to claim 3, characterized in that: The contact surface (11) is provided with wiring holes (111) for LED module wiring.

5. A heat sink for LEDs according to claim 4, characterized in that: The heat sink body (1) has a cable outlet (112) on the side away from the contact surface (11) that communicates with the cable routing hole (111).

6. A heat sink for LEDs according to claim 5, characterized in that: The exhaust groove (5) runs longitudinally through the radiator body (1).

7. A heat sink for LEDs according to claim 6, characterized in that: The number of exhaust grooves (5) is two, and they are respectively located on both sides of the outlet hole (112).

8. A heat sink for LEDs according to claim 1, characterized in that: The radiator body (1) has a wave-shaped first heat dissipation surface (100) on its circumferential outer wall.

9. A heat sink for LEDs according to claim 1, characterized in that: One or more of the ventilation slots (2) have a wavy second heat dissipation surface (101) on the inner side wall near the contact surface (11).

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