CN100504158C - A kind of LED street light - Google Patents

Abstract

The invention discloses an LED street lamp, with the purpose of providing an 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 (5) and a plurality of LEDs (6), wherein, a plurality of LEDs (6) are installed on the face side of the base plate (2), and are arranged in the cavity surrounded by the rear cover (1) and the front cover (5) together with the base plate (2), the LED street lamp also comprises a heat conducting back plate (3), a plurality of heat conducting ribs (4), wherein, the back side of the base plate (2) is provided with a plurality of convex sections (9), 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 convex sections (9). The invention can be widely applied to the outdoor illumination field.

Description

A kind of LED street light

technical field

The invention relates to an 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 the LED reaches 55°C, its lifespan 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 LED street lamp with good heat dissipation effect and effectively prolonged service life.

The first technical solution adopted by the present invention is: the present invention includes a metal back cover, a substrate, a light-transmitting front cover, and several LEDs, and several LEDs are installed on the front of the substrate and arranged together with the substrate In the cavity surrounded by the rear cover and the front cover, the LED street lamp also includes a heat-conducting backplane and several heat-conducting ribs, and several protrusions are arranged on the back of the substrate, and the heat-conducting backplane and the heat-conducting backplane The inner surfaces of the rear cover are in close contact with each other 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-conducting back plate and the convex part.

A groove is provided on the convex part, and the shape of the bottom of the heat conduction rib matches the groove and is fixedly arranged in the groove.

The groove is a straight groove or a dovetail groove.

A thermal conductive glue groove is provided at the bottom of the groove.

Further, the LED street lamp further includes a positioning fastener, and the positioning fastener connects and fixes the bottom of the heat conducting rib with the convex part.

Further, several wire grooves are arranged on the base plate.

The second technical solution adopted by 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 front of the substrate and arranged together with the substrate In the cavity surrounded by the rear cover and the front cover, the LED street lamp also includes a heat-conducting backplane and several heat-conducting ribs, and several protrusions are arranged on the back of the substrate, and the heat-conducting backplane and the heat-conducting backplane The inner surfaces of the rear cover are in close contact with each other 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-conducting back plate and the convex part.

The bottom of the heat conducting rib is provided with an upward groove, and the shape of the top of the convex part is adapted to the groove and is fixedly arranged in the groove.

The grooves are straight grooves or dovetail grooves.

Further, the LED street lamp further includes a positioning fastener, and the positioning fastener connects and fixes the bottom of the heat conducting rib with the convex part.

Further, several wire grooves are arranged on the base plate.

The beneficial effects of the present invention are: since the present invention includes a heat-conducting backplane and several heat-conducting ribs, several protrusions are provided on the back of the substrate, and the heat-conducting backplane is in close contact with the inner surface of the rear cover, and the two The upper and lower parts of the heat-conducting ribs are respectively connected to the heat-conducting back plate and the convex part. Such a structure makes the heat generated by the LED pass through the convex part of the substrate when the street lamp is in operation. The back cover is conducted through the heat-conducting ribs and the heat-conducting back plate in turn, and diffused into the external environment through the metal back cover, so that the LED is always in a suitable working temperature state, avoiding the long-term exposure of the LED to high temperature. The service life is shortened due to lower working, so the invention has a good heat dissipation effect and can effectively prolong the service life;

Since the protrusion is provided with a groove in the present invention, the shape of the bottom of the heat conduction rib is adapted to the groove and is fixedly arranged in the groove; or, the bottom of the heat conduction rib is provided with an upward Groove, the shape of the top of the protrusion is adapted to the groove and is fixedly arranged in the groove. This structure makes the connection between the heat conducting rib and the substrate stable, and the contact area is large, which is helpful for heat dissipation. The invention has good heat dissipation effect;

Since the bottom of the groove in the present invention is provided with a heat-conducting glue groove, heat-conducting glue can be put into the heat-conducting glue groove, and then the heat-conducting ribs and the convex parts are matched and connected, so that the heat-conducting glue will conduct heat The fine gap between the rib and the convex part is filled, which is more conducive to heat conduction, so the heat dissipation effect of the present invention is better;

Since the present invention also includes a positioning fastener, the positioning fastener connects and fixes the bottom of the heat-conducting rib with the protrusion, so that the connection between the heat-conducting rib and the substrate is more stable, and the anti-vibration performance is good , so the structure of the present invention is stable;

Since the base plate of the present invention is provided with a plurality of wire grooves, the wires can be placed in the wire grooves, so the invention facilitates the arrangement of the wires neatly and beautifully, and is easy to identify.

Description of drawings

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

Fig. 2 is the partially enlarged structure schematic diagram of I place of LED street lamp shown in Fig. 1;

Fig. 3 is a schematic structural diagram of the connection between the thermal conductive rib and the substrate according to Embodiment 2 of the present invention;

FIG. 4 is a schematic structural view of the connection between the heat conducting rib and the substrate according to Embodiment 3 of the present invention.

Detailed ways

Embodiment one:

As shown in Figures 1 and 2, the present invention includes a metal back cover 1, a substrate 2, a heat-conducting back plate 3, several heat-conducting ribs 4, a light-transmitting front cover 5, and several LEDs 6, and several LEDs 6 are mounted on the The front side of the substrate 2 is arranged together with the substrate 2 in the cavity surrounded by the rear cover 1 and the front cover 6. The substrate 2 is inwardly concave, and of course it can also be in other shapes such as outwardly convex , the back side of the substrate 2 is provided with several wire grooves 8 and several convex parts 9, of course, the wire grooves 8 can also be arranged on the front of the substrate 2, and the wires 7 are placed in the wire grooves 8, so that the wires The arrangement is neat and beautiful and easy to identify. The heat-conducting 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-conducting ribs 4 are respectively connected to the heat-conducting The back plate 3 and the convex portion 9 are connected. The upper part of the heat conduction rib 4 and the heat dissipation back plate 3 are connected together by welding, of course, other fixed connection methods such as continuous casting may also be used. The convex part 9 is provided with a groove 10, the groove 10 is a straight groove, the shape of the bottom of the heat conduction rib 4 is adapted to the groove 10 and fixedly arranged in the groove 10, so A thermal conductive glue groove 11 is provided at the bottom of the groove 10 . The LED street lamp also includes a positioning fastener 12, and the positioning fastener 12 uses screws to connect and fix the bottom of the heat conducting rib 4 with the convex portion 9.

Embodiment two:

As shown in Figure 3, the difference between this embodiment and Embodiment 1 is that the groove 10 is a dovetail groove, and the positioning fastener 12 is not provided in this embodiment, but is fixed by the specific shape of the dovetail groove itself. purpose of positioning.

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

Embodiment three:

As shown in Figure 4, the difference between this embodiment and the second embodiment is that: the bottom of the heat conducting rib 4 is provided with an upward groove 13, and the shape of the top of the convex part 9 is adapted to the groove 13 and fixedly arranged In the groove 13, the groove 13 is a dovetail groove, of course, the groove 13 can also be a straight groove, and the thermal conductive glue groove 11 is not provided in this embodiment.

The other features of this embodiment are the same as those of Embodiment 2.

The invention has simple structure, convenient installation, 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 (10)

1, a kind of LED street lamp, comprise metal back cover (1), substrate (2), printing opacity front shroud (5), several LED (6), several described LED (6) are installed on the front of 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: described LED street lamp also comprises heat conduction backboard (3), several heat conduction muscle (4), the back side of described substrate (2) is provided with some protuberances (9), described heat conduction 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 conduction backboard (3), described protuberance (9) is connected.

2, a kind of LED street lamp according to claim 1, it is characterized in that: described protuberance (9) is provided with groove (10), and the bottom shape of described heat conduction muscle (4) and described groove (10) are suitable and be fixedly set in the described groove (10).

3, a kind of LED street lamp according to claim 2 is characterized in that: described groove (10) is a straight trough.

4, a kind of LED street lamp according to claim 2 is characterized in that: described groove (10) is a dovetail groove

5, according to claim 2 or 3 or 4 described a kind of LED street lamps, it is characterized in that: the bottom of described groove (10) is provided with heat-conducting glue groove (11).

6, a kind of LED street lamp according to claim 1 is characterized in that: the bottom of described heat conduction muscle (4) is provided with groove (13) upwards, and the top shape of described protuberance (9) and described groove (13) are suitable and be fixedly set in the described groove (13).

7, a kind of LED street lamp according to claim 6 is characterized in that: described groove (13) is a straight trough.

8, a kind of LED street lamp according to claim 6 is characterized in that: described groove (13) is a dovetail groove.

9, want 1 described a kind of LED street lamp according to right, it is characterized in that: described LED street lamp also comprises location securing member (12), and described location securing member (12) is connected to a fixed the bottom and the described protuberance (9) of described heat conduction muscle (4).

10, a kind of LED street lamp according to claim 1, it is characterized in that: described substrate (2) is provided with some wiring ducts (8).

Images