CN100504159C - Integrated heat dissipation LED street light - Google Patents

Abstract

The invention discloses an LED street lamp, with the purpose of providing an integrated heat radiating LED street lamp which has good heat radiation effect, and prolongs the service life effectively. The invention comprises a metal rear cover (1), a base plate (2), a non light tight front cover (6), and a plurality of LEDs (7), wherein, a plurality of LEDs (7) are installed in the base plate (2), and are arranged in the cavity surrounded by the rear cover (1) and the front cover (6) together with the base plate (2), a heat radiator is arranged between the base plate (2) and the rear cover (1), the heat radiator comprises a heat conducting back plate (3), a plurality of heat conducting ribs (4), wherein, the heat conducting back plate (3) and the inner surface of the rear cover (1) contact tightly and have adaptive shapes, and the upper part and the lower part of the heat conducting ribs (4) are respectively connected with the back plate (3) and the base plate (2). The invention can be widely applied to the outdoor illumination field.

Description

Integrated heat dissipation LED street light

technical field

The invention relates to an integrated heat dissipation LED street lamp.

Background technique

The energy consumption in the lighting field accounts for about 20% of the entire electric energy, while only 30% of the electric energy of ordinary lighting lamps is used to emit light, and the rest is converted into heat energy and emitted to the outside world. LED is regarded as a cold light source because it generates less heat during operation and has higher luminous efficiency. LED street lights are composed of substrates with LEDs, lenses, and heat dissipation systems. Compared with traditional incandescent and fluorescent lamps, their energy-saving efficiency can reach more than 90%. Since its birth, it has attracted more and more attention from all over the world due to its high efficiency, low consumption, energy saving, environmental protection, and long life. At present, the electricity used for street lighting in my country is close to 250 billion kWh every year. If 1/3 of them can be illuminated by LED street lighting, about 80 billion kWh of electricity can be saved every year, which is basically equivalent to the annual power generation of the Three Gorges Power Station.

Although LED is regarded as a cold light source, it still generates a certain amount of heat during operation. The operating temperature of the LED should generally be less than 50°C. According to some data, when the working temperature of LED reaches 55°C, its service life will be reduced by half. The heat dissipation system of current LED street lamps is not perfect, which has become a stumbling block in the process of its popularization and application. This situation is even more serious for medium and high power LED street lamps. Therefore, heat dissipation technology has become one of the main research directions of relevant technicians.

The street lamp is in the outdoor environment for a long time, and its structure requires waterproof, dustproof, and insect-proof, and its lampshade must be a closed cavity. The LEDs of LED street lights also work in a closed environment, which means that they cannot dissipate heat directly to the outside through air convection, but can only dissipate heat outward through the lampshade. For this reason, some technicians set a heat sink on the back of the substrate, so that the heat emitted by the LED can be dissipated into the air through the heat sink in time. However, the inner space of the lampshade is closed and limited, and effective convection cannot be formed, and the heat transfer coefficient of the air is low. Therefore, this kind of LED street lamp only dissipates heat from the LED to the heat sink quickly, and dissipates heat from the heat sink to the outside very slowly, which cannot be adapted to street lights. long-term work requirements.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an integrated heat dissipation LED street lamp with good heat dissipation effect and effectively prolonged service life.

The technical solution adopted in the present invention is: the present invention includes a metal rear cover, a substrate, a light-transmitting front cover, and several LEDs, and several LEDs are installed on the substrate, and are arranged on the rear surface together with the substrate. In the cavity surrounded by the cover and the front cover, a radiator is provided between the base plate and the rear cover, and the radiator includes a heat dissipation backplane and several heat conduction ribs. A notch, the notch divides the heat dissipation backplane into several folded surfaces, the folded surfaces are only partially connected to each other, and the heat dissipation backplane is in close contact with the inner surface of the rear cover. And the shapes of the two are compatible, and the upper and lower parts of the heat conducting ribs are respectively connected with the heat dissipation backplane and the substrate.

The plurality of heat conducting ribs are parallel to each other, and a heat dissipation space is formed between adjacent heat conducting ribs.

The lower part of the heat conducting rib is provided with a lower folded edge, and the lower folded edge is in close contact with the substrate and the shapes of the two are compatible.

The upper part of the heat conduction rib is provided with an upper folded edge, and the upper folded edge is fixedly connected with the inner surface of the heat dissipation backboard and the shapes of the two are compatible.

The beneficial effects of the present invention are: since a radiator is provided between the base plate and the rear cover of the present invention, the radiator includes a heat dissipation backplane and several heat conducting ribs, and the heat dissipation backplane and the rear cover The inner surfaces are in close contact with each other and the shapes of the two are compatible. The upper and lower parts of the heat-conducting ribs are respectively connected with the heat-dissipating backplane and the substrate. Such a structure makes the heat generated by the LED pass through the The substrate sequentially conducts the back cover through the heat conducting ribs and the heat dissipation back plate, and diffuses into the external environment through the back cover made of metal, so that the LED is always in a suitable working temperature state, avoiding the long-term damage of the LED The service life caused by working at high temperature is shortened, so the present invention has a good heat dissipation effect and can effectively prolong the service life;

Since the plurality of heat conducting ribs in the present invention are parallel to each other, a heat dissipation space is formed between adjacent heat conducting ribs. This structure makes the air flow in the cavity surrounded by the rear cover and the front cover relatively smooth, which helps Heat dissipation, so the heat dissipation effect of the present invention is better;

Since the lower part of the heat-conducting rib in the present invention is provided with a lower hem, the lower hem is in close contact with the substrate and the shapes of the two are compatible, and the upper part of the heat-conducting rib is provided with an upper hem, so The upper folded edge is fixedly connected to the inner surface of the heat dissipation backplane, and the shapes of the two are compatible. This structure makes the contact area between the heat conduction ribs, the substrate and the heat dissipation backplane large, and the heat exchange effect is improved. Good, so the heat dissipation effect of the present invention is better;

Since there are several notches on the heat dissipation backboard of the present invention, the notches divide the heat dissipation backplane into several folded surfaces, and the folded surfaces are only partially connected to each other, so that, on the one hand, it is convenient The heat dissipation backplane is punched and manufactured so that the shape of the heat dissipation backplane and the inner surface of the rear cover match as much as possible; on the other hand, after the heat dissipation backplane is under pressure, the folded surface will undergo adaptive deformation, Eliminating the fine gap between the heat dissipation backboard and the rear cover is more conducive to heat dissipation, so the heat dissipation effect of the present invention is better.

Description of drawings

Fig. 1 is a schematic structural view of Embodiment 1 of the present invention;

Fig. 2 is a schematic structural diagram of Embodiment 2 of the present invention;

Fig. 3 is a schematic structural view of Embodiment 3 of the present invention;

FIG. 4 is a schematic structural view of a heat dissipation backplane according to Embodiment 4 of the present invention.

Detailed ways

Embodiment one:

As shown in Figure 1, the present invention comprises a metal rear cover 1, a substrate 2, a light-transmitting front cover 6, and several LEDs 7, and several LEDs 7 are installed on the substrate 2, and are arranged on the substrate 2 together with the substrate 2. In the cavity surrounded by the rear cover 1 and the front cover 6, the substrate 2 is concave, and a radiator is arranged between the substrate 2 and the rear cover 1, and the radiator includes a heat dissipation backplane 3. A plurality of heat conduction ribs 4, the heat dissipation backplane 3 is in close contact with the inner surface of the rear cover 1 and the shapes of the two are compatible, the upper and lower parts of the heat conduction ribs 4 are in contact with the heat dissipation backplane The plates 3 are integrally connected by continuous casting, and of course other connection methods such as welding can also be used. Several heat-conducting ribs 4 are parallel to each other, and a heat dissipation space 10 is formed between adjacent heat-conducting ribs 4 . The heat-conducting ribs 4 The lower part is provided with a lower folded edge 5, said lower folded edge 5 is in close contact with said base plate 2 and connected by screws, and the shapes of the two are compatible.

Embodiment two:

As shown in FIG. 2 , the difference between this embodiment and the first embodiment is that the substrate 2 is convex.

The remaining features of this embodiment are the same as those of Embodiment 1.

Embodiment three:

As shown in Figure 3, the difference between this embodiment and Embodiment 1 is that: the upper part of the heat conduction rib 4 is provided with an upper flange 8, and the upper flange 8 is fixedly connected with the inner surface of the heat dissipation backplane 3 And the shapes of the two are compatible.

The remaining features of this embodiment are the same as those of Embodiment 1.

Embodiment four:

As shown in Figure 4, the difference between this embodiment and Embodiment 1 is that there are several notches 9 on the heat dissipation backplane 3, and the notches 9 divide the heat dissipation backplane 3 into several folding surfaces. 11. The folded surfaces 11 are only partially connected to each other. In this way, on the one hand, it is convenient for the stamping and fabrication of the heat dissipation backplane 3, so that the shape of the inner surface of the heat dissipation backplane 3 and the rear cover 1 is as close as possible; on the other hand, after the heat dissipation backplane 3 is pressed, The folded surface 11 will be adaptively deformed to eliminate the fine gap between the heat dissipation backplane 3 and the rear cover 1 , which is more conducive to heat dissipation, so the heat dissipation effect is better.

The remaining features of this embodiment are the same as those of Embodiment 1.

The invention has the advantages of simple structure, convenient processing, high luminous efficiency, good heat dissipation effect and long service life, and is an ideal replacement product for existing street lamps.

The invention can be widely used in the field of outdoor lighting.

Claims (4)

1, a kind of integral heat dissipation LED road lamp, comprise metal back cover (1), substrate (2), printing opacity front shroud (6), several LED (7), several described LED (7) are installed on the described substrate (2), and in described substrate (2) is arranged at the chamber that described back cover (1) and described front shroud (6) surround, it is characterized in that: be provided with radiator between described substrate (2) and the described back cover (1), described radiator comprises heat radiation backboard (3), several heat conduction muscle (4), have several notches (9) on the described heat radiation backboard (3), described notch (9) is divided into several folding faces (11) with described heat radiation backboard (3), described folding face (11) only depends on the part to interconnect, described heat radiation backboard (3) closely contacts connection mutually with the inner surface of described back cover (1) and the shape of the two is suitable, on the described heat conduction muscle (4), the bottom respectively with described heat radiation backboard (3), described substrate (2) is connected.

2, integral heat dissipation LED road lamp according to claim 1 is characterized in that: several described heat conduction muscle (4) are parallel to each other, form heat-dissipating space (10) between the adjacent described heat conduction muscle (4).

3, integral heat dissipation LED road lamp according to claim 1 is characterized in that: the bottom of described heat conduction muscle (4) is provided with lower hem (5), and closely contact connection and the shape of the two are suitable mutually with described substrate (2) for described lower hem (5).

4, integral heat dissipation LED road lamp according to claim 1 is characterized in that: the top of described heat conduction muscle (4) is provided with upper hem (8), the inner surface of described upper hem (8) and described heat radiation backboard (3) be fixedly connected and the shape of the two suitable.

Images