CN202165930U - An LED street lamp with improved heat dissipation - Google Patents

Abstract

The utility model discloses a LED street lamp with improved heat dissipation, which comprises a shell, a flexible PCB, an aluminum radiator and a lithium-magnesium alloy radiating fin, wherein a plurality of LED lamps are arranged in front of the flexible PCB, the flexible PCB is arranged in an inner cavity of the shell, the back of flexible PCB circuit board is fixed in lithium magnesium alloy fin, and lithium magnesium alloy fin is fixed in the aluminium radiator, the utility model discloses increase a lithium magnesium alloy fin, lithium magnesium alloy fin have higher coefficient of heat conduction, and heat conduction is fast, conducts the heat that flexible PCB circuit board during operation produced rapidly to the aluminium radiator, gathers in flexible PCB circuit board heat very few, guarantees that flexible PCB circuit board has lower temperature, the utility model discloses simple structure, with low costs, the radiating rate is fast, and the radiating effect is good, improves the luminous efficiency of the LED lamp of flexible PCB circuit board, prolongs the life of the LED street lamp of flexible PCB circuit board.

Description

An LED street lamp with improved heat dissipation

technical field

The utility model relates to the technical field of advertising lamps, in particular to an LED street lamp with improved heat dissipation.

Background technique

In the prior art, LED street lamps are used to provide lighting for public places such as roads and residential areas. LED street lamps include housings, LED lamp groups and aluminum radiators. The LED lamp groups and aluminum radiators are fixed in the housing. Aluminum radiator. However, the power of LED street lamps is relatively large, and when LED street lamps are working, the heat generated by the LED lamp group is relatively high, and the temperature of the LED lamp group is relatively high. In the prior art, LED street lamps are only pasted with an aluminum heat sink on the back of the LED lamp group. Although the aluminum heat sink has a certain heat dissipation effect, the heat conduction speed of the aluminum heat sink is relatively slow, and the heat dissipation speed still cannot meet the heat dissipation requirements of the LED street light. , The heat dissipation effect of LED street lamps is still not ideal, and the temperature of the LED lamp group of LED street lamps is still high, so it is necessary to improve.

Contents of the invention

Aiming at the deficiencies of the existing technology, the purpose of this utility model is to provide an LED street lamp with improved heat dissipation, which has simple structure, low cost, fast heat dissipation, good heat dissipation effect, improves the luminous efficiency of LED lamps, and prolongs the use of LED street lamps life.

In order to achieve the above object, the technical solution adopted by the utility model is.

An LED street lamp with improved heat dissipation, comprising a casing, a flexible PCB circuit board, an aluminum radiator and a lithium-magnesium alloy heat sink, a plurality of LED lights are arranged on the front of the flexible PCB circuit board, and the flexible PCB circuit board is arranged in the inner cavity of the casing, The back of the flexible PCB circuit board is fixed to the lithium-magnesium alloy heat sink, and the lithium-magnesium alloy heat sink is fixed to the aluminum heat sink.

The top of the aluminum radiator is provided with a flat portion, the lithium-magnesium alloy heat sink is attached to the flat portion, and the bottom of the aluminum radiator is provided with several fins.

The lithium-magnesium alloy heat sink is embedded on the top of the aluminum heat sink.

The front of the LED street lamp is provided with a light-transmitting lens, and the light-transmitting lens fixes the casing.

After adopting the above structure, the utility model has the advantages compared with the prior art: the utility model adds a lithium-magnesium alloy heat sink, the lithium-magnesium alloy heat sink has a high thermal conductivity, and the heat conduction speed is fast, and the flexible The heat generated when the PCB circuit board is working is conducted to the aluminum radiator, and the heat accumulated in the flexible PCB circuit board is very small, which ensures that the flexible PCB circuit board has a lower temperature. The utility model has the advantages of simple structure, low cost, fast heat dissipation speed and good heat dissipation effect Well, improve the luminous efficiency of LED lights on flexible PCB circuit boards, and prolong the service life of LED street lights on flexible PCB circuit boards.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a schematic structural view of the LED street lamp of the present invention.

FIG. 2 is an enlarged cross-sectional view of the AA section in FIG. 1 .

Fig. 3 is an exploded schematic view of the LED street lamp of the present invention.

Fig. 4 is a schematic diagram of the assembly of the flexible PCB circuit board, the lithium-magnesium alloy heat sink and the aluminum heat sink of the present invention.

In the figure: 1. Shell 2. Flexible PCB circuit board 3. Aluminum heat sink 4. LED lamp 5. Li-magnesium alloy heat sink 6. Wings 7. Transparent lens.

Detailed ways

The following descriptions are only preferred embodiments of the present utility model, and do not therefore limit the protection scope of the present utility model.

The embodiment is shown in Fig. 1 to Fig. 4: an LED street lamp with improved heat dissipation, including a housing 1, a flexible PCB circuit board 2 and an aluminum heat sink 3, and several LED lamps 4 are arranged on the front of the flexible PCB circuit board 2, and the flexible PCB circuit board 2 The PCB circuit board 2 is disposed in the inner cavity of the housing 1 , and the front of the LED street lamp is provided with a light-transmitting lens 7 , and the light-transmitting lens 7 fixes the housing 1 .

The flexible PCB circuit board 2 is a soft printed circuit board, and the flexible PCB circuit board 2 can be bent at will. The thickness of the flexible PCB circuit board 2 is small, and compared with the rigid printed circuit board, the heat conduction speed of the flexible PCB circuit board 2 is faster.

The LED street lamp also includes a lithium-magnesium alloy heat sink 5 , the back of the flexible PCB circuit board 2 is fixed to the lithium-magnesium alloy heat sink 5 , and the lithium-magnesium alloy heat sink 5 is fixed to the aluminum heat sink 3 . The lithium-magnesium alloy heat sink 5 is a sheet made of lithium-magnesium alloy material. The lithium-magnesium alloy heat sink 5 has a higher thermal conductivity and higher thermal conductivity. The utility model uses the lithium-magnesium alloy heat sink 5 as the first-order heat conduction medium to increase the heat conduction speed and rapidly reduce the temperature of the LED lamp group, and uses the aluminum heat sink 3 as the second-order heat conduction medium to reduce the use of the lithium-magnesium alloy heat sink 5 Quantity, cost reduction, better overall heat conduction effect.

The top of the aluminum radiator 3 is provided with a flat portion, the lithium-magnesium alloy heat sink 5 is attached to the flat portion, and the bottom of the aluminum radiator 3 is provided with several fins 6 .

The lithium-magnesium alloy heat sink 5 is embedded on the top of the aluminum heat sink 3 .

The lithium-magnesium alloy heat sink 5 has a high thermal conductivity and fast heat conduction speed, and quickly conducts the heat generated by the flexible PCB circuit board 2 to the aluminum heat sink 3, and the heat accumulated in the flexible PCB circuit board 2 is very small, ensuring that the flexible PCB circuit board The circuit board 2 has a lower temperature. The utility model has the advantages of simple structure, low cost, fast heat dissipation and good heat dissipation effect, which improves the luminous efficiency of the LED lamp 4 on the flexible PCB circuit board 2 and prolongs the life of the LED street lamp on the flexible PCB circuit board 2. service life.

The above content is only a preferred embodiment of the present utility model. For those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation and scope of application. The content of this specification should not be understood as Limitations on the Invention.

Claims (4)

1. An LED street lamp with improved heat dissipation, including a housing (1) and an aluminum radiator (3), the aluminum radiator (3) is arranged in the inner cavity of the housing (1), and it is characterized in that it also includes a lithium-magnesium alloy for heat dissipation sheet (5) and flexible PCB circuit board (2), the front of the flexible PCB circuit board (2) is provided with a number of LED lights (4), the flexible PCB circuit board (2) is provided with the inner cavity of the housing (1), the flexible The back of the PCB circuit board (2) is fixed to the lithium-magnesium alloy heat sink (5), and the lithium-magnesium alloy heat sink (5) is fixed to the aluminum heat sink (3). 2. An LED street lamp with improved heat dissipation according to claim 1, characterized in that: the top of the aluminum radiator (3) is provided with a flat part, and the lithium-magnesium alloy heat sink (5) is attached to the flat part The bottom of the aluminum radiator (3) is provided with several fins (6). 3. An LED street lamp with improved heat dissipation according to claim 1 or 2, characterized in that the lithium-magnesium alloy heat sink (5) is embedded on the top of the aluminum heat sink (3). 4. An LED street lamp with improved heat dissipation according to claim 3, characterized in that: the front of the LED street lamp is provided with a light-transmitting lens (7), and the light-transmitting lens (7) fixes the housing (1).

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