KR20130018460A

KR20130018460A - Heat sink for outdoor led light

Info

Publication number: KR20130018460A
Application number: KR1020110108355A
Authority: KR
Inventors: 조재명
Original assignee: 중앙아이티엘 주식회사
Priority date: 2011-08-01
Filing date: 2011-10-21
Publication date: 2013-02-25
Also published as: KR101244852B1

Abstract

The present invention protects the LED lighting from the outside while fixing the LED lighting to the street lamp post, and also serves as a housing to prevent the accumulation of foreign matter such as rainwater, fallen leaves and dust, and also has a high heat dissipation function to perform an efficient cooling function A heat sink for an LED street light, which may include a conductive part having a fixing hole formed therein, a plurality of radiating fins extending in a lateral direction while being inclined from the conductive part, and a coupling surface formed on a lower surface of the conductive part. The present invention relates to a heat sink for an LED street light.
According to the present invention, since the heat dissipation fins formed in the conductive portion and the conductive portion are exposed to the outside in a structure that prevents the accumulation of foreign substances, the heat dissipation fin can be maintained without being disturbed by heat dissipation. Can exert effect to be able to increase

Description

LED heat sink for heat lamp {heat sink for outdoor LED light}

The present invention relates to an LED street light heat sink, and more particularly to an LED street light heat sink having a heat dissipation function at the same time as the housing function when exposed to the outdoors.

Generally, street lamps, security lamps, and parks are used in outdoor street environments such as roadsides, alleys, and parks, and various methods of using LED modules as light sources have been attempted.

In the LED module used as described above, heat is inevitably generated in the process of converting electricity into light, and in particular, when an integrated LED module is used to increase illuminance, the amount of electricity used increases and accordingly, the amount of heat generated also increases. .

Therefore, in order to apply the LED module to the street light, it is necessary to secure sufficient heat dissipation while increasing the amount of light.

The LED module is additionally provided with a heat sink having good conductivity such as aluminum for effective heat dissipation. However, in the conventional heat sink, since the upper portion of the "U" type upward groove is formed, foreign matters such as rainwater, dust or fallen leaves and bird droppings may accumulate in the grooves, which not only inhibits heat dissipation but also foreign matters. If heat generation is seriously impaired due to continuous accumulation in this groove, fire may be caused by heat accumulated without heat dissipation.

In addition, since the structure of the conventional LED street light was a die-casting method in which the housing and the heat sink are usually manufactured in a predetermined size and structure, different housings and heat sinks had to be made according to the specifications of the LED module.

As described above, the structure surrounding the heat sink in the housing has a problem in that the structure is complicated, the manufacturing ability is low, and the cost is increased because a separate outer frame must be configured.

In addition, the conventional cooling method and the heat sink structure is a cause of failure such as the heat dissipation effect is further reduced over time and the life of the LED street light is shortened due to the heat dissipation failure.

The present invention has been proposed in view of the above-mentioned problems, fixing the LED lighting to the lamppost, while protecting the LED lighting from the outside, and also serves as a housing to prevent the accumulation of foreign matter such as rainwater, fallen leaves and dust The purpose of the present invention is to provide an LED street light heat sink capable of performing an efficient cooling function by having a high heat dissipation function.

In addition, an object of the present invention is to provide a heat sink for the LED street light to widen the left and right light distribution of the LED module and to increase the uniformity.

In addition, an object of the present invention is to provide a heat sink for the LED street light to induce the air flow of the heat sink is improved.

Moreover, an object of this invention is to provide the heat sink for LED street lamps which are easy to connect with a prop.

In addition, an object of the present invention is to provide a heat sink for the LED street light, the length of the heat sink according to the luminous capacity specification of the LED module and easy to manufacture.

In the present invention, in order to solve the above problems, a conductive part extending in the horizontal direction and forming a central body, a plurality of radiating fins extending in the lateral direction while inclining from the conductive part and a coupling surface formed on the lower surface of the conductive part It provides a heat sink for the LED street light, characterized in that.

In the present invention, the plurality of heat dissipation fins may increase in length closer to the coupling surface, and the plurality of heat dissipation fins may be bent toward the lower surface of the conductive portion.

In the present invention, the plurality of heat dissipation fins may be arranged in layers, and a space groove may be formed between the plurality of heat dissipation fins.

In the present invention, the conductive portion, the heat radiation fins, and the coupling surface may be made integral.

In the present invention, the shape of the cross section in the direction perpendicular to the horizontal axis may be constant along the horizontal axis.

In the present invention, the conductive portion may be formed with a fixing hole in the horizontal axis direction.

In the present invention, a through hole connected to the fixing hole is formed on the upper surface of the conductive part, and may further include a fixing bolt inserted into the through hole.

In the present invention, a thermal paste layer may be formed on the bonding surface.

In the present invention, the engaging surface may be formed as an inclined surface symmetrical.

In the present invention, it may be further provided with a waterproof cover which is disposed on the fixing hole of the conducting portion, which can seal the fixing hole.

In the present invention, a through hole connected to the fixing hole is formed in the coupling surface, and the cable gland for waterproofing the wire may be inserted into the through hole.

In the present invention, the plurality of heat dissipation fins are not formed at a part of the side of the conductive portion, and a ventilation passage may be formed in a direction perpendicular to the axial direction of the fixing hole.

In the present invention, the conductive portion extending in the horizontal axis to form a central body, the wing portion extending laterally from the conductive portion, a plurality of first heat radiation fins extending laterally while inclining from the conductive portion, the lower portion from the wing portion It may also include a plurality of second radiating fins extending and a coupling surface formed on the lower surface of the conductive portion.

In the present invention, the plurality of first heat dissipation fins may increase in length closer to the coupling surface, and the plurality of first heat dissipation fins may be bent toward the lower surface of the conductive portion.

In the present invention, the plurality of first heat dissipation fins and the second heat dissipation fins may be arranged in a stack, and a space groove may be formed between the plurality of first heat dissipation fins and the second heat dissipation fins.

In the present invention, the conductive portion, the first heat dissipation fin, the second heat dissipation fin and the coupling surface may be made integrally.

In the present invention, the shape of the cross section in the direction perpendicular to the horizontal axis may be constant along the horizontal axis direction.

In the present invention, the coupling surface may be formed as an inclined surface symmetrical.

In the present invention, since the plurality of heat dissipation fins are not formed at a portion of the side surface of the conductive portion, a ventilation passage may be formed in a direction perpendicular to the axial direction of the fixing hole.

LED street light heat sink according to the present invention, the heat dissipation fins formed in the conductive portion and the conductive portion is exposed to the outside to prevent the accumulation of foreign matter can be maintained so as not to receive a heat dissipation obstacle, and thus can further increase the cooling efficiency It can exert an effect.

In addition, the heat sink for the LED street light according to the present invention, the heat sink fin wing of the outer surface of the heat sink has a downward structure, since the upper structure of the heat sink is a left and right downward roof structure, it can induce the foreign matter to flow down without accumulating, thereby water In addition, the housing function does not accumulate foreign matter such as fallen leaves and dust, which can protect the LED module and the heat sink itself.

In addition, the heat sink for the LED street light according to the present invention, since the conventional LED module that the light is collected by the lens and the reflector is attached to the mating surface formed in the inclination angle to share the left and right side light distribution, and the light distribution center is divided into left and right It can exert the effect of improving the road surface uniformity.

In addition, the heat sink for the LED street light according to the present invention can exert an effect of promoting the flow of air heated from the heat radiating fins because the heat sinks form a ventilation passage in which the heat radiating fins are cut in a row.

In addition, the heat sink for the LED street light has a fixing hole penetrated in the transverse direction in the conductive portion can be fitted to the fixing rod and can act as a passage of the power line can exhibit an easy fixing effect.

In addition, since the heat sink of the present invention can be produced by extrusion molding to form a horizontal axis and its cross section is continuous in a constant bar shape, productivity is improved, and various product specifications for each cooling capacity of the heat sink are changed according to the cutting length of the bar. It can produce the effect.

In addition, since the heat sink for the LED street light according to the present invention is directly exposed to the outdoors and is formed by serving as a housing (housing) itself, it does not constitute a separate housing can exhibit an effect that the configuration is simple.

1 is a perspective view of a heat sink for an LED street light coupled to a street lamp post of the first embodiment of the present invention.
2 is a cross-sectional view of the heat sink for the LED street light of the first embodiment of the present invention.
3 is a cross-sectional view of the heat sink for the LED street light of the first embodiment of the present invention.
Figure 4 is a front view of the heat sink for the LED street light coupled with the LED module of the first embodiment of the present invention.
Figure 5 is a perspective view of the heat sink for the LED street light coupled to the street lamp post of the second embodiment of the present invention.
6 is a cross-sectional view of the heat sink for the LED street light of the second embodiment of the present invention.
Figure 7 is a front view of the heat sink for the LED street light coupled with the LED module of the second embodiment of the present invention.
8 is a perspective view of a heat sink for an LED street light of a third embodiment of the present invention;

LED street light heat sink according to the present invention, the LED is fixed to the fixed stand disposed on the top of the street lamp post erected on the ground, the LED coupled to the LED module is configured for the LED circuit for lighting in the lower portion of the ordinary Metal Print Circuit Board (Metal Print Circuit Board) It is heat sink for street light.

Hereinafter, embodiments 1, 2, and 3 of the above configuration will be described in detail with reference to the accompanying drawings.

1 to 4 show a heat sink for an LED street light of a first embodiment of the present invention. As shown in FIG. 1, the heat sink 10 for the LED street light according to the first embodiment of the present invention has a conductive part 11 having a fixing hole 14 formed therein, and is inclined laterally while being inclined from the conductive part 11. It consists of a plurality of heat radiating fins 12 extending and a coupling surface 13 formed on the lower surface of the conductive portion.

In connection with the street lamp post (1), the heat sink 10 for the LED street light extends from the street lamp post (1) to a fixing hole (14), which is a through hole penetrating the conduction portion (11) in the direction of the horizontal axis (5). Fixture 2 is fitted primarily. In order to make this fitting more secure, it is preferable that the protrusion part is formed in the inner surface of the fixing hole 14.

In addition, in order to more secure such fixing, as shown in Fig. 1 and 4, the through hole 15 which is connected to the fixing hole 14 is formed on the upper surface of the conductive portion 11, A fixing bolt 20 is inserted into the through hole to contact the fixing table 2.

The fixing hole 14 serves to couple the heat sink 10 to the support 1 by combining with the holder 2 as described above, and at the same time, the power line (not shown) of the power line guided inside the holder 2. It also serves as a wiring space and passageway.

On the other hand, with respect to the coupling with the LED module 100, as shown in Figure 4, at least one LED module 100 in the heat sink 10 according to the output capacity of the plurality of bolts 101 Are combined.

The LED module 100 is composed of an LED lighting circuit coupled to the metal PCB and the lower surface thereof in the direction of the ground, it is preferable that the top is a planar shape to be coupled to the coupling surface 13 of the heat sink 10. In such a configuration, the metal PCB upper surface of the LED module 100 is attached to the coupling surface 13 formed under the heat sink 10 in a planar manner, and that is, between the metal PCB and the heat sink 10, that is, the coupling surface 13. ), A thermal paste layer (not shown) is formed.

Therefore, the heat generated in the LED module 100 formed under the heat sink 10 is transferred from the metal PCB of the LED module 100 through the thermal paste layer below the coupling surface 13 to the coupling surface 11 under the heat sink 10. Is inverted). The lower surface of the LED module 100 may be further provided with a protective cover 102 that can protect the LED module 100 from the outside.

In addition, the coupling surface 13 is formed with a through hole 16 connected to the fixing hole 14, the cable gland for waterproofing the wire may be inserted into the through hole.

The conductive portion 11 has a central portion is upward, the left and right sides are inclined downward, the lower portion is a plane, the fixing hole 14 penetrating the inside is formed. In addition, the conductive part 11 serves as the body of the heat sink 10 so that the heat dissipation fin 12, the coupling surface 13 and the fixing hole 14 are arranged in a three-dimensional shape.

Preferably, by the above configuration, the conductive portion 11 has a sufficient cross-sectional area so that heat conducted from the LED module 100 can conduct heat to the heat dissipation fins 12, and has a structure suitable for heat dissipation.

The conductive part 11 serves as a housing for protecting the LED module 100 while preventing the accumulation of foreign matters from the outside because the center portion forms an inclined surface of the bank shape upward and downward. As the lateral inclination of the conducting portion 11 increases, the heat dissipation fins 12 to be described later will be inclined downward.

The plurality of heat dissipation fins 12 increases in length as they are closer to the coupling surface 13 to which the LED module 100 is coupled, that is, closer to the lower side in FIGS. 2 to 4, and bent in the coupling surface direction of the conductive portion, that is, in the lower direction. It has a shape. In addition, the plurality of heat dissipation fins 12 are arranged in layers, and a space groove is formed between the plurality of heat dissipation fins.

That is, the heat dissipation fin 12 extends from the side portion of the conduction portion 11 downward to the left and right along the inclined surface from the top of the conduction portion 11, the wing line is formed by the end of the end of the heat dissipation fin 12 is connected to the body It is parallel to the horizontal axis 5 of. In addition, the plurality of heat dissipation fins make a downward slope, and each of the heat dissipation fins has a wing shape along the horizontal axis 5 in the axial direction of the fixing hole 14, and a space groove is formed between the heat dissipation fins having such a wing shape. Each of the heat sink fins is arranged from the top to the bottom of the conductive portion in an inclined layer.

In the heat dissipation fin 12 having such a configuration, when foreign matter such as rainwater and fallen leaves fall on the conduction portion 11 and the heat dissipation fin 12, the end of the heat dissipation fin 12 positioned on the inclined surface of the conduction portion 11, that is, the blade It flows down to the improvement, falls from the wing line, falls to the upper surface of the other heat dissipation fin arranged in the lower part, and flows down to the wing line of the other heat dissipation fin arranged in the lower part in the same way. Through this process, foreign matters such as rainwater and fallen leaves fall from the end of the heat sink fin, ie, wing line, to the ground through the inclined surfaces of the heat sink fins arranged in layers, so that foreign matters do not accumulate in the heat sink 10. Flow down.

In addition, the heat sink 10 is provided with a heat sink fin 12, the shape of the roof shape inclined left and right downward as shown in the embodiment of the present invention rainwater the LED module 100 and the heat sink 10 itself disposed at the bottom It can also act as a housing by covering them together so that foreign matter does not accumulate.

In addition, preferably, the conductive portion 11, the heat dissipation fin 12 and the engaging surface 13 is formed integrally, the cross section of the heat sink 10 in the direction perpendicular to the horizontal axis (5) of the fixing hole (14) The shape is constant along the horizontal axis 5 direction of the fixing hole 14.

That is, the conductive part 11, the heat dissipation fin 12, and the coupling surface 13 of the heat sink 10 of the present invention are integrally made of an aluminum material having excellent thermal conductivity and formability, and the conductive part 11 and the heat dissipation fin 12 ) And the coupling surface 13 is formed integrally to extend in the horizontal axis (5) direction, so that the heat sink 10 structure of the present invention is easy to mass production in a certain shape by extrusion molding Have characteristics.

Specifically, the heat sink 10 of the present invention, once the manufacturing process is made of a long rod-shaped semi-finished product by extrusion molding, the semi-finished product is cut into pieces according to the length and width of the LED module required for the street light capacity, various LED street light Heat sink 10 suitable for the standard can be easily manufactured. In addition, it is possible to further increase the cooling capacity by cutting the length as needed. Thereafter, a ventilation passage formed by partially removing the heat dissipation fins along the height direction of the conductive portion 11, that is, the vertical axis 5a, is formed on the heat sink 10 having the cut shape as described above. After forming and forming the through hole 15 to be inserted, it may be commercialized through a surface treatment process for preventing corrosion.

Such a structure has a high cooling efficiency since the airflow deterioration and cooling disturbance factors, which are problematic due to the conventional cover, are eliminated.

In addition, the heat sink 10 extruded so that the conductive portion 11, the heat dissipation fin 12, and the mating surface 13 forms a body has a simple structure because it does not cover a separate cover because it serves as a housing itself. Volume and weight are reduced.

In addition, since the conductive part 11 does not constitute an additional housing such as an outer cover or a mesh, the flow of cooling air is not disturbed and is directly exposed to the air together with the heat dissipation fin 12 so that contact with the cooling air is free. Will be done.

Also, preferably, as shown in FIG. 3, the engagement surface may be formed of two or more inclined surfaces. In FIG. 3, the coupling surface 13 coupled to the LED module 100 is parallel to the horizontal axis 5 and divided based on the vertical axis 5a to form an inclined plane of right and left symmetry.

Regarding such a configuration of the engaging surface 13, it will be described as follows.

On the road surface, the horizontal roughness becomes more severe as the distance difference from the light source increases, and the related equation is as follows.

Eh = horizontal roughness

I = luminance (㏅ / ㎡)

r = distance (m)

When incident angle = θ

Eh = I / r² cosθ.

According to the relational equation, since the horizontal roughness of the road surface is inversely proportional to the square of the distance and is proportional to the cosθ value of the incident angle, the greater the light receiving range of the road surface, the greater the distance difference from the center of the light source, and thus the greater the difference in the roughness.

In order to reduce the distance difference from the center of the projection range according to the relationship, when the LED module 100 is attached to each of the symmetrically inclined coupling surface 13, the center of illumination is moved to both sides and the Since the distance difference between the center and the side of the projection surface is reduced, the illumination range is shared, the illuminance difference is reduced, and the uniformity is improved.

In this case, the LED module 100 is preferably applied to a light converging module that collects light in one direction through a lens or a reflector so as to limit the irradiation range of light to one side.

In addition, preferably, as shown in Figure 4, disposed on the fixing hole 14 of the conductive portion 11, and further provided with a waterproof cover 30 for sealing the fixing hole (14). The waterproof cover 30 is coupled to the front of the conductive portion 11 by a coupling means 31 such as a bolt. By such a configuration, it is possible to prevent foreign matter from entering into the fixing hole 14.

Although not shown in FIGS. 1 to 4, preferably, as described above, the heat dissipation fins 12 are not formed at a portion of the side surface of the conductive portion 11 in the vertical axis 5a direction, so that the radiating fins 12 are perpendicular to the axial direction of the fixing hole. The ventilation passage may be formed in the direction, that is, in the height direction of the conductive portion 11 or in the direction of the vertical axis 5a. 8 illustrates such a ventilation passage 70.

The ventilation passage is a passage in which a plurality of heat dissipation fins 12 along the horizontal axis 5 are cut in a row at right angles to the horizontal axis 5, which is heated by space air between the continuous heat dissipation fins 12. It can be discharged into the passage between the cut wings and exert an effect of promoting convection.

5 to 6 show a heat sink for an LED street light of a second embodiment of the present invention. In the description of the second embodiment, the same components are referred to by the same terms and reference numerals.

As shown in FIG. 5, the heat sink 200 for the LED street light according to the second embodiment of the present invention includes a conductive part 11 having a fixing hole 14 formed therein, and a wing part extending laterally from the conductive part 11. (50), a plurality of first heat dissipation fins 40 extending laterally inclined from the conductive portion 11, a plurality of second heat dissipation fins 60 extending downward from the wing portion 50 and the conductive portion The engaging surface 13 formed in the lower surface of (11) is included.

Compared with the first embodiment of the present invention, the second embodiment of the present invention additionally includes a wing portion 50, and the heat dissipation fins are divided into the first heat dissipation fin 40 and the second heat dissipation fin 50. It is different. The wing portion 50 is preferably bent to extend to the lower side or the ground side while extending to the side.

The plurality of first heat dissipation fins 40 are increased in length as they are closer to the mating surface, and are bent toward the lower surface of the conductive portion. In addition, the plurality of first heat dissipation fins 40 and the second heat dissipation fins 60 are arranged in a stack, and a space groove is formed between the plurality of first heat dissipation fins 40 and the second heat dissipation fins 60.

In such a configuration, the first heat dissipation fin 40 extends from the side of the conductive portion 11 downward from the top of the conductive portion 11 to the left and right along the inclined surface, the end of the end of the first heat dissipation fin 40 is The wing line which connects and forms is parallel with the horizontal axis 5 of a body. In addition, the plurality of heat dissipation fins make a downward slope, and each of the heat dissipation fins has a wing shape along the horizontal axis 5 in the axial direction of the fixing hole 14, and a space groove is formed between the heat dissipation fins having such a wing shape. Each of the heat sink fins is arranged from the top to the bottom of the conductive portion in an inclined layer.

In this configuration, when foreign matters such as rainwater and fallen leaves fall on the heat sink 200, they flow down the inclined surface of the conductive part 11 to the ends of the heat dissipation fins located at the top of the first heat dissipation fins 40, that is, the wing lines. It falls from the wing line and falls on the upper surface of the other heat sink fin disposed in the lower portion, and flows down to the wing line of the other heat radiation fin disposed in the lower portion in the same manner. Through this process, foreign matters such as rainwater and fallen leaves fall from the end of the heat dissipation fin positioned at the lowermost side, that is, the wing line 50, through the inclined surface of the first heat dissipation fin 40 arranged in layers.

Subsequently, foreign matter flows down along the upper surface of the wing 50 bent in the direction of the ground, and falls from the end of the wing 50 to the ground.

That is, in such a configuration, the second heat dissipation fin 60 is disposed below the conductive part 11 and extends in parallel with the horizontal axis 5 on the surface of the conductive part 12, but no foreign matter is accumulated. That is, not only the heat dissipation ability is improved by the second heat dissipation fin 60, which is an additional heat dissipation fin located at the lower portion, and the foreign matter does not accumulate and flows down the wings 50.

That is, the wing portion 50 of the second embodiment of the present invention extends from the conduction portion 11 in order to double the heat dissipation function, which also forms a lateral symmetry of the left and right symmetry so that foreign matter does not accumulate, Since the heat dissipation fins 60 are parallel to the horizontal axis 5, the heat dissipation fins 60 radiate heat directly to the air together with the housing role as the first heat dissipation fins 40 arranged on both upper sides.

As shown in FIG. 5, the second embodiment of the present invention, as shown in FIG. 5, has a fixing hole through which the LED street light heat sink 200 penetrates the conducting portion 11 in connection with the street lamp post 1. In 14, the fixed base 2 extended from the street lamp post 1 is fitted primarily. In order to make this fitting more secure, it is preferable that the protrusion part is formed in the inner surface of the fixing hole.

Further, in order to ensure such fixing more preferably, as shown in FIG. 7, a through hole 15 connected to the fixing hole is formed on an upper surface of the conductive portion 11, and the through A fixing bolt 20 is inserted into the hole and in contact with the fixing table 2.

The fixing hole 14 serves to couple the heat sink 200 to the support 1 by combining with the fixing stand 2 as described above, and at the same time, the power line (not shown) of the power line guided inside the fixing stand 2. It also serves as a wiring space and passageway.

Meanwhile, in connection with the LED module 100, as illustrated in FIG. 7, at least one LED module 100 is connected to the plurality of bolts 101 according to the output capacity of the heat sink 200. Are combined.

The LED module 100 is composed of an LED lighting circuit coupled to the metal PCB and the lower surface thereof in the direction of the ground, it is preferable that the top is a planar shape to be coupled to the coupling surface 13 of the heat sink 10. In such a configuration, the metal PCB upper surface of the LED module 100 is attached to the coupling surface 13 formed under the heat sink 10 in a planar manner, and that is, between the metal PCB and the heat sink 10, that is, the coupling surface 13. ), A thermal paste layer (not shown) is formed. The engagement surface 13 may be composed of two or more surfaces as shown in FIG. 6, and may also be configured in one plane.

In addition, the conductive part 11, the first heat dissipation fin 40, the second heat dissipation fin 60 and the coupling surface 13 is formed integrally, the heat sink in the direction perpendicular to the horizontal axis (5) of the fixing hole (14) The shape of the cross section of 10) is constant along the horizontal axis 5 direction of the fixing hole 14.

That is, the conductive part 11, the first heat sink fins 40, the second heat sink fins 60, and the mating surface 13 of the heat sink 10 of the present invention are integrally made of an aluminum material having excellent thermal conductivity and formability. Since the conductive portion 11, the first heat sink fin 40, the second heat sink fin 60 and the engaging surface 13 is formed integrally and extends in the direction of the transverse axis 5, the heat of the present invention, The structure of the sink 200 has characteristics of easy mass production in a standard of a predetermined shape by extrusion molding.

Specifically, the heat sink 200 of the present invention, once the manufacturing process is made of a long rod-shaped semi-finished product by extrusion molding, the semi-finished product is cut into pieces according to the length and width of the LED module required for the street light capacity, various LED street light The heat sink 200 suitable for the standard can be easily made. In addition, it is possible to further increase the cooling capacity by cutting the length as needed. Subsequently, a ventilation passage is formed by partially removing the heat dissipation fins along the height direction of the conductive portion 11 to be described later, that is, the vertical axis 5a, to the heat sink 200 having the cut shape as described above. After the additional forming process of the through-hole 15 is inserted can be commercialized through a surface treatment process to prevent corrosion.

Such a structure has a high cooling efficiency since the airflow deterioration and cooling disturbance factors, which are problematic by the conventional cover, are removed.

That is, the heat sink 10 extruded so that the conductive portion 11, the first heat dissipation fin 40, the second heat dissipation fin 60, and the mating surface 13 forms a body has its own role as a housing. The cover is not padded, resulting in a simple structure and reduced volume and weight.

In addition, as shown in Figure 7, preferably, the coupling surface may be formed of two or more inclined surfaces. In FIG. 7, the coupling surface 13 coupled to the LED module 100 is parallel to the horizontal axis 5 and divided based on the vertical axis 5a to form a symmetrical inclined plane.

As such, when the LED module 100 is attached to each of the coupling surfaces 13 inclined to the left and right symmetry, the center of the light is separated and moved to both sides, and the distance difference between the center and the side of the projection surface of the light is reduced. The range of is divided, roughness difference is reduced, and uniformity is improved.

In addition, preferably, as shown in Figure 7, it is disposed on the fixing hole 14 of the conducting portion 11, and additionally provided with a waterproof cover 30 capable of sealing the fixing hole (14). The waterproof cover 30 is coupled to the front of the conductive portion 11 by a coupling means 31 such as a bolt. By such a configuration, it is possible to prevent foreign matter from entering into the fixing hole 14.

Although not shown in FIGS. 5 to 7, it is preferable that a plurality of heat dissipation fins 40 and 60 and the wing 50 are not formed in a portion of the side surface of the conductive portion 11 in the vertical axis 5a direction as described above. As a result, a ventilation passage may be formed in a direction perpendicular to the axial direction of the fixing hole, that is, in the height direction of the conductive portion 11 or in the vertical axis 5a direction. 8 illustrates an example of such a ventilation passage 70.

The ventilation passages are passages in which the heat dissipation fins 40 and 60 and the wing portions 50 along the horizontal axis 5 are cut in a row in a direction perpendicular to the horizontal axis 5, which are continuously connected between the heat dissipation fins 12. Heated air from the space groove of the discharged to the passage between the cut wings can promote the effect of promoting convection.

8 shows a heat sink 300 for an LED street light of a third embodiment of the present invention. In the description of the third embodiment, the same components are referred to by the same terms and reference numerals.

As shown in FIG. 8, the third embodiment of the present invention is also applicable to the case where the stator 2 of the street lamp is not a general cylindrical shape as compared with the first and second embodiments of the present invention. It has a plurality of fixing grooves 301 that can be.

On the other hand, in the third embodiment of the present invention, the fixing hole 301 has a small hole diameter, is formed of a plurality of holes, and is formed through the conductive portion parallel to the horizontal axis so as to sandwich the fixing rod and the power supply line.

In the third embodiment, the ventilation passage 70 described above is provided, which is shown in FIG. Specifically, the ventilation passage 70 is a passage in which a plurality of heat dissipation fins 12 along the horizontal axis 5 are cut in a row at right angles to the horizontal axis 5, which is a space between the continuous heat dissipation fins 35. The heated air in the groove is discharged into the ventilation passage 70 between the cut wings to promote convection.

The present invention can be equally applied to LED streetlights as well as streetlights using other light sources.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. You must see.

1: street lamp holder 2: fixture
5: horizontal axis 5a: vertical axis
10, 200, 300: heat sink 11: conduction part
12: heat dissipation fin 13: coupling surface
14: fixing hole 20: fixing bolt
30: waterproof cover 40: first heat radiation fin
50: wing 60: second heat radiation fin
70: ventilation passage 100: LED module

Claims

A conducting portion extending in the transverse direction and forming a central body,
A plurality of heat dissipation fins extending laterally while being inclined from the conductive portion;
LED street light heat sink comprising a coupling surface formed on the lower surface of the conductive portion.

The method according to claim 1,
The plurality of heat dissipation fins are increased in length closer to the coupling surface,
The plurality of heat dissipation fins heat sink for the LED street light, characterized in that bent toward the lower surface of the conducting portion.

The method according to claim 2,
The plurality of heat dissipation fins are arranged in layers,
An LED street light heat sink, characterized in that a space groove is formed between the plurality of heat radiation fins.

The method according to claim 1,
The conductive portion, the heat dissipation fins, and the coupling surface is a heat sink for the LED street light, characterized in that made in one piece.

The method according to claim 1 to 4,
An LED street light heat sink, characterized in that the shape of the cross section in a direction perpendicular to the horizontal axis is constant along the horizontal axis.

The method according to claim 1,
The conducting portion is a heat sink for the LED street light, characterized in that the fixing hole is formed in the horizontal axis direction.

The method of claim 6,
The upper surface of the conductive portion is formed with a through hole connected to the fixing hole,
LED street light heat sink further comprises a fixing bolt inserted into the through hole.

The method according to claim 1,
An LED street light heat sink, characterized in that a thermal paste layer is formed on the bonding surface.

The heat sink for an LED street light according to claim 1, wherein the coupling surface is formed of an inclined surface that is symmetrically symmetrical.

The method of claim 6,
The heat sink for the LED street light is disposed on the fixing hole of the conductive portion, and further comprising a waterproof cover for sealing the fixing hole.

The method of claim 6,
The coupling surface has a through hole connected to the fixing hole,
LED through-hole heat sink, characterized in that the cable gland for waterproofing the wire is inserted.

The method according to claim 1,
The heat sink for the LED street light, characterized in that the ventilation path is formed in a direction perpendicular to the axial direction of the fixing hole by not forming a plurality of heat radiation fins on the side of the conductive portion.

A conducting portion extending in the transverse direction and forming a central body,
A wing portion extending laterally from the conduction portion,
A plurality of first heat dissipation fins extending laterally while being inclined from the conductive portion;
A plurality of second heat dissipation fins extending downward from the wing;
LED street light heat sink comprising a coupling surface formed on the lower surface of the conductive portion.

The method according to claim 13,
The plurality of first heat sink fins are increased in length closer to the coupling surface,
The plurality of first heat dissipation fins heat sink for the LED street light, characterized in that bent toward the lower surface of the conductive portion.

The method according to claim 14,
The plurality of first heat dissipation fins and the second heat dissipation fins are arranged in layers,
The heat sink for the LED street light, characterized in that a space groove is formed between the plurality of first and second heat radiation fins.

14. The method of claim 13,
The conducting portion, the first heat dissipation fin, the second heat dissipation fin and the coupling surface heat sink for an LED street light, characterized in that made in one piece.

The method according to claim 13 to 16,
An LED street light heat sink, characterized in that the shape of the cross section in a direction perpendicular to the horizontal axis is constant along the horizontal axis direction.

The method according to claim 13,
The conducting portion is a heat sink for the LED street light, characterized in that the fixing hole is formed in the horizontal axis direction.

19. The method of claim 18,
The upper surface of the conductive portion is formed with a through hole connected to the fixing hole,
LED heat sink for the street lamp further comprises a fixing bolt inserted into the through hole.

The method according to claim 13,
An LED street light heat sink, characterized in that a thermal paste layer is formed on the bonding surface.

The method according to claim 13,
The coupling surface is a heat sink for the LED street light, characterized in that formed in the symmetrical inclined surface.

19. The method of claim 18,
The heat sink for the LED street light is disposed on the fixing hole of the conductive portion, and further comprising a waterproof cover for sealing the fixing hole.

19. The method of claim 18,
The coupling surface has a through hole connected to the fixing hole,
The heat sink for the LED street light, characterized in that the cable gland for waterproofing the wire is inserted into the through hole.

The method according to claim 13,
The heat sink for the LED street light, characterized in that the ventilation path is formed in a direction perpendicular to the axial direction of the fixing hole is not formed in a portion of the side of the conductive portion.