LED lamp heat dissipation structure

Abstract

The utility model relates to an LED lamp heat dissipation structure which comprises a lampshade, an aluminum substrate arranged in the lampshade, LED lamp beads arranged below the aluminum substrate and a radiator arranged above the aluminum substrate, and the radiator comprises a heat dissipation bottom plate, heat dissipation fins and a fan. The heat dissipation bottom plate is attached to the back face of the aluminum substrate, the heat dissipation fins are vertically arranged and arranged on the heat dissipation bottom plate in parallel, and a heat dissipation channel is formed between every two adjacent heat dissipation fins; cavities are formed in the heat dissipation bottom plate and the heat dissipation fins, the cavities of the heat dissipation bottom plate and the heat dissipation fins are communicated with each other, and the cavities are filled with cooling liquid. And the fan is arranged above or on the side of the radiating fins. According to the LED lamp, the cooling liquid is filled in the cavities in the heat dissipation bottom plate and the heat dissipation fins, external air is led into the heat dissipation channel through the fan, air flowing is accelerated, heat dissipated by the heat dissipation fins is taken away, the heat dissipation effect is further enhanced, and the situation that the luminous efficiency and the service life of the LED lamp beads are affected due to the fact that the temperature is too high is effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of LED lighting technology, and in particular to a heat dissipation structure for LED lights. Background Technology

[0002] Generally, LED lights rely on an aluminum heat sink mounted on the back of an aluminum substrate to dissipate the heat from the LED beads into the air through convection. High-power LED lights, in particular, need to dissipate a lot of heat, so the number of fins on the aluminum heat sink is usually increased to increase its surface area. However, this can lead to a dense arrangement of radial aluminum fins, which can actually hinder the convection cooling effect.

[0003] Chinese utility model patent CN214619396U discloses a heat dissipation and anti-glare structure for an LED lamp with a reflector, including a heat dissipation substrate, an aluminum substrate with LED beads, and a light bead lens plate. The heat dissipation substrate includes an integrally formed bowl-shaped reflector, main heat dissipation fins, and secondary heat dissipation fins. The main heat dissipation fins are longitudinally arranged on the top outer side of the bowl-shaped reflector, and the secondary heat dissipation fins are laterally arranged on both sides of the main heat dissipation fins. The aluminum substrate is arranged on the top inner side of the bowl-shaped reflector, and the bottom of it is covered with a light bead lens plate. However, this LED lamp relies solely on the heat dissipation fins for heat dissipation, which has limited heat dissipation effect and is not suitable for long-term use of high-power LEDs. Utility Model Content

[0004] The purpose of this invention is to provide a heat dissipation structure for LED lamps to solve the problems mentioned in the background art.

[0005] The above-mentioned objective of this utility model is achieved through the following technical solution: an LED lamp heat dissipation structure, including a lamp cover, an aluminum substrate disposed inside the lamp cover, LED beads disposed below the aluminum substrate, and a heat sink disposed above the aluminum substrate, wherein the heat sink includes a heat dissipation base plate, heat dissipation fins, and a fan.

[0006] The heat dissipation base plate is attached to the back of the aluminum substrate, and the heat dissipation fins are vertically arranged and parallel to each other on the heat dissipation base plate, with a heat dissipation channel formed between two adjacent heat dissipation fins.

[0007] Both the heat dissipation base plate and the heat dissipation fins are provided with cavities, and the cavities of the two are interconnected and filled with coolant.

[0008] The fan is positioned above or to the side of the heat dissipation fins to introduce external air into the heat dissipation channel.

[0009] Preferably, the radiator further includes a housing, the heat dissipation fins are disposed inside the housing, the fan is disposed on one side or top of the housing, and an exhaust groove is provided on the side wall of the housing, the exhaust groove being directly opposite the end of the heat dissipation channel.

[0010] Preferably, the ends of the heat dissipation fins extend to the inner wall of the housing and are fixedly connected to the housing.

[0011] Preferably, the thickness of the heat dissipation fins located in the middle of the heat dissipation base plate is greater than the thickness of the heat dissipation fins on both sides.

[0012] Preferably, the aluminum substrate and the heat dissipation base plate are provided with a heat dissipation adhesive layer.

[0013] Preferably, a fixing frame is provided at the outer edge of the aluminum substrate, and the fixing frame is fixed to the heat dissipation base plate by bolts.

[0014] Preferably, the inner frame edge of the fixing frame is provided with a pressing edge, which presses against the front side of the aluminum substrate.

[0015] Preferably, the fixing frame is provided with mounting feet around its perimeter, and the bolts are threaded through the mounting feet.

[0016] The beneficial effects of this utility model are:

[0017] This invention fills the cavities within the heat dissipation base plate and heat dissipation fins with coolant. The flow of coolant further accelerates the conduction and transfer of heat. A fan introduces external air into the heat dissipation channel, accelerating airflow and carrying away the heat emitted by the heat dissipation fins, thus further enhancing the heat dissipation effect and effectively preventing the LED beads from having their luminous efficiency and lifespan affected by excessive temperature. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0019] Figure 2 This is an exploded view of an embodiment of the present utility model;

[0020] Figure 3 This is a cross-sectional view of an embodiment of the present utility model;

[0021] Figure 4 This is an exploded view of the radiator in an embodiment of this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the fixed frame in an embodiment of this utility model;

[0023] In the diagram: 1-lampshade, 2-aluminum substrate, 3-LED beads, 4-heat sink, 401-heat sink base plate, 402-heat sink fins, 403-cavity, 404-fan, 405-cover, 406-exhaust vent, 5-fixing frame, 501-pressing edge, 502-mounting foot, 6-heat dissipation adhesive layer. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings.

[0025] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present utility model.

[0026] Example: Figure 1-4 As shown, an LED lamp heat dissipation structure includes a lamp cover 1, an aluminum substrate 2, LED beads 3 and a heat sink 4. The LED beads 3 are distributed below the aluminum substrate 2 and fixed on the aluminum substrate 2. The aluminum substrate 2 and the LED beads 3 are installed inside the lamp cover 1.

[0027] The heat sink 4 is mounted on top of the aluminum substrate 2, such as... Figure 3 and Figure 4 As shown, the heat sink 4 includes a heat sink base plate 401, heat sink fins 402 and a fan 404. The heat sink base plate 401 is attached to the back of the aluminum substrate 2. The aluminum substrate 2 and the heat sink base plate 401 are provided with a heat dissipation adhesive layer 7, which is made of conventional organic silicone.

[0028] A fixing frame 5 is provided at the outer edge of the aluminum substrate 2, and the fixing frame 5 is fixed to the heat dissipation base plate 401 by bolts. A pressing edge 501 is provided at the inner edge of the fixing frame 5, and the pressing edge 501 presses against the front surface of the aluminum substrate 2. Mounting feet 502 are provided around the fixing frame 5, and bolts are passed through the mounting feet 502. The fixing frame 5 and the heat dissipation adhesive layer 7 ensure that the aluminum substrate 2 can be firmly connected to the heat dissipation base plate 401.

[0029] The heat dissipation fins 402 are vertically arranged and parallel on the heat dissipation base plate 401, and a heat dissipation channel is formed between two adjacent heat dissipation fins 402.

[0030] Both the heat dissipation base plate 401 and the heat dissipation fins 402 are provided with cavities 403, which are interconnected. The cavities 403 are filled with coolant, which is water.

[0031] The heat dissipation base plate 401 and the heat dissipation fins 402 are made of aluminum or copper.

[0032] Fan 404 is mounted above heat sink fins 402 and is used to introduce external air into the heat dissipation channel.

[0033] A cover 405 is installed on the outer periphery of the heat dissipation fins 402. The heat dissipation fins 402 are located inside the cover 405. The fan 404 is installed on the top of the cover 405. A through hole is opened on the top of the cover 405.

[0034] An exhaust groove 406 is provided on the side wall of the cover 405, and the exhaust groove 406 is directly opposite the end of the heat dissipation channel.

[0035] The end of the heat dissipation fin 402 extends to the inner wall of the cover 405 and is fixedly connected to the cover 405. The heat dissipation fin 402 and the cover 405 can be connected by an integral structure or by a plug-in method. The material of the cover 405 is the same as that of the heat dissipation fin 402.

[0036] During the heat dissipation process, the heat dissipation base plate 401 pre-absorbs the heat generated by the LED beads 3. After the coolant in the cavity 403 of the heat dissipation base plate 401 absorbs the heat, it convects with the coolant in the cavity 403 of the heat dissipation fins 402, so that the coolant with a stable and high temperature flows into the heat dissipation fins 402. During this process, the fan 404 blows the external cold air into the cover 405 and discharges it along the heat dissipation channel, thereby dissipating heat from the heat dissipation fins 402.

[0037] Since the number of LED beads 3 distributed in the middle of the aluminum substrate 2 is greater, the temperature here is relatively high. As a further improvement, in another embodiment, the thickness of the heat dissipation fins 402 located in the middle of the heat dissipation base plate 401 is greater than the thickness of the heat dissipation fins 402 on both sides. The cavity 403 in the middle heat dissipation fins 402 has a larger space, which can hold more coolant and absorb more heat.

[0038] In another embodiment, a fan 404 is disposed on one side of the housing 405 and located at the end of the heat dissipation channel, such that the fan 404 blows external air into the heat dissipation channel from one end of the heat dissipation channel.

Claims

1. A heat dissipation structure for an LED lamp, comprising a lampshade (1), an aluminum substrate (2) disposed within the lampshade (1), LED beads (3) disposed below the aluminum substrate (2), and a heat sink (4) disposed above the aluminum substrate (2), characterized in that, The radiator (4) includes a heat dissipation base plate (401), heat dissipation fins (402) and a fan (404). The heat dissipation base plate (401) is attached to the back of the aluminum substrate (2), and the heat dissipation fins (402) are vertically arranged and parallel to each other on the heat dissipation base plate (401), forming a heat dissipation channel between two adjacent heat dissipation fins (402). Both the heat dissipation base plate (401) and the heat dissipation fins (402) are provided with cavities (403), and the cavities (403) of the two are interconnected, and the cavities (403) are filled with coolant. The fan (404) is located above or to the side of the heat dissipation fins (402) and is used to introduce external air into the heat dissipation channel.

2. The LED lamp heat dissipation structure according to claim 1, characterized in that: The radiator (4) also includes a cover (405), the heat dissipation fins (402) are disposed inside the cover (405), the fan (404) is disposed on one side or top of the cover (405), and an exhaust groove (406) is provided on the side wall of the cover (405), the exhaust groove (406) is directly opposite the end of the heat dissipation channel.

3. The LED lamp heat dissipation structure according to claim 2, characterized in that: The end of the heat dissipation fins (402) extends to the inner wall of the cover (405) and is fixedly connected to the cover (405).

4. The LED lamp heat dissipation structure according to claim 1, characterized in that: The thickness of the heat dissipation fins (402) located in the middle of the heat dissipation base plate (401) is greater than the thickness of the heat dissipation fins (402) on both sides.

5. The LED lamp heat dissipation structure according to claim 1, characterized in that: The aluminum substrate (2) and the heat dissipation base plate (401) are provided with a heat dissipation adhesive layer (7).

6. The LED lamp heat dissipation structure according to claim 5, characterized in that: A fixing frame (5) is provided at the outer edge of the aluminum substrate (2), and the fixing frame (5) is fixed to the heat dissipation base plate (401) by bolts.

7. The LED lamp heat dissipation structure according to claim 6, characterized in that: A pressing edge (501) is provided at the inner frame edge of the fixing frame (5), and the pressing edge (501) presses against the front surface of the aluminum substrate (2).

8. The LED lamp heat dissipation structure according to claim 7, characterized in that: The fixed frame (5) is provided with mounting feet (502) around its perimeter, and the bolts are inserted through the mounting feet (502).

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