KR101090645B1 - Reflective light - Google Patents

Abstract

The present invention relates to a reflective lighting device, which emits light 100;

A reflector 200 positioned above the light emitter 100 and reflecting light emitted from the light emitter 100; And a radiator 300 which is in contact with a bottom surface of the light emitting part 100 and has a plurality of radiating fins extending a predetermined length in a vertical direction from the bottom of the light emitting part 100.

LED lighting, reflective, reflector, double curved, counterflow heat exchanger

Description

Reflective lighting device {REFLECTIVE LIGHT}

The present invention relates to a reflective illumination device for diffusing light emitted from a light source using a reflector.

In the meantime, there has been a breakthrough in technological advancement with much interest and efforts in LED lighting. However, the LED lights developed to date have been out of the market due to their narrow diffusion angle and glare, making them unsuitable for home or building lighting.

In addition, it was developed as a street lamp or tunnel light, but it did not achieve the desired result due to the lack of countermeasures against glare and heat, which is a chronic problem of LED lighting. In particular, in the case of a conventional street light or tunnel light, the heat sink is excessively large or has a complicated heat dissipation structure in comparison with the amount of light emitted from the LED light, which has a problem in that installation costs are increased and manufacturing costs are greatly increased.

In general, in order to use an LED light source as lighting, it is essential to secure an appropriate diffusion angle and to improve glare. In addition, the heat generated when the LED lighting device emits light is concentrated on the light emitting part of the device, and as a result, the temperature of the device is high, which lowers the luminous efficiency.

In order to secure a diffusion angle, a method of attaching a diffusion lens to an LED light source has been developed. However, considering that a different diffusion angle is required according to the type of illumination used, it is difficult to see it as an appropriate alternative. In addition, a method of securing a diffusion angle using a plurality of concave reflectors has also been developed, which is disadvantageous in that it is not visually smooth as irradiation is performed by a plurality of lights.

On the other hand, conventionally, by using an excessively large heat sink as a countermeasure for heat radiation, or installed in the space between the light source and the power supply site, there is a problem that the heat radiation effect is lowered because it is not exposed to the atmosphere after the installation of the light. Degradation of the heat dissipation causes secondary problems such as reduced power output and shorter LED life.

The present invention has been made to solve the problems of the prior art as described above, and an object of the present invention is to provide a reflective lighting device for improving the narrow diffusion angle and glare of the LED lighting.

On the other hand, another object of the present invention is to provide a reflective lighting device that enables effective heat dissipation by counter-current heat exchange to minimize the size of the heat radiation fins used for heat dissipation.

Reflective lighting device of the present invention for achieving the above object is a light emitting unit for emitting light (100);

A reflector 200 positioned above the light emitter 100 and reflecting light emitted from the light emitter 100; And

And a radiator 300 which is in contact with the bottom surface of the light emitting part 100 and has a plurality of radiating fins extending a predetermined length in a vertical direction from the bottom surface of the light emitting part 100.

According to the present invention, by placing a reflecting plate having a double curved surface on the top of the LED light source having a narrow diffusion angle, it is possible to secure an appropriate diffusion angle, it is possible to easily remove the dark portion under the lighting device.

In addition, there is an effect that it is possible to implement a diffused or concentrated lighting device by solving the glare of the LED light source by controlling the irradiation angle at the same time by the diffusion of light using the reflector.

Furthermore, by using a colored reflector, there is an effect that various emission colors can be realized without deterioration of illuminance beyond the limit of the emission color that the LED as a light source can produce.

In addition, since the heat sink is exposed to the outside air and has a structure capable of counter-current heat exchange, efficient natural heat dissipation by buoyancy is possible. Therefore, the amount of heat dissipation per unit size of the heat sink can be maximized, thereby reducing the input material for heat dissipation and extending the life of the LED.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration of the reflective lighting apparatus according to the present invention.

1 is a view showing the appearance of a reflective lighting apparatus according to an embodiment of the present invention, Figure 2 is a reference diagram conceptually showing a process of reflecting light through a reflecting plate in the reflective lighting apparatus shown in FIG. 3 is a reference diagram illustrating a form in which a reflective lighting apparatus according to the present invention and a lighting apparatus according to the prior art are inserted into and installed on an installation surface.

On the other hand, as shown in (a) and (b) of Figure 1 according to the reflective lighting device according to the present invention is a socket inserting portion 400 which is a portion inserted into the socket from above, a wide dish-shaped reflector plate (below) 200 is located, the light emitting unit 100 is located under the reflecting plate, it can be seen that the radiator 300 is formed long in the vertical direction below. Meanwhile, a transparent protective plate 500 made of a transparent material is mounted to allow light to pass through the space between the radiator 300 and the reflector 200.

The light emitting unit 100 may be a light source that emits light when electric energy is applied, such as a halogen lamp, an incandescent lamp, a LED, and the like. On the other hand, as described below, since the narrow diffusion angle and glare phenomenon of the LED light can be greatly improved according to the present invention, the light emitting part 100 is preferably an LED light source, and the light emitting part 100 is simply a light source element. Although only an LED device may be referred to, it should be understood as a concept including a member on which a light source device is mounted. Although a circular thin LED is shown in the example of FIG. 1, the shape of the LED is not particularly limited.

On the other hand, as shown in (b) of Fig. 2 and 3 (b) the light emitting unit 100 does not emit light toward the bottom of the installation surface, but instead emits light toward the installation surface, the emitted light is reflected plate ( 200 is reflected and diffused.

The bottom surface of the light emitting unit 100 is attached to the heat sink 300 for dissipating the heat generated from the light emitting unit 100, so when looking at the example of Figure 3 (b) to the bottom of the heat sink 300 Since light does not reach, relatively dark dark areas can occur.

In order to solve this problem, the reflector 200 has a double curved structure as shown in FIG. 2. The dish-shaped reflector 200 shown in FIG. 2 has its central portion convex downward (ie, toward the light emitting portion 100) so that light emitted from the light emitting portion 100 has a wide diffusion angle and is widely spread around. do. On the other hand, the reflecting plate 200 has a concave curved surface toward the periphery, the light emitted from the light emitting unit 100 is reflected in the peripheral portion of the reflecting plate 200 in this way proceeds to the bottom of the radiator 300.

FIG. 2 (a) shows the shape of the reflector plate 200 to secure a wide diffusion angle, and FIG. 2 (b) shows that a large amount of light is irradiated to the bottom of the heat sink 300 on the contrary. The shape of the reflecting plate 200 is illustrated.

In other words, when the curvature of the center of the reflector 200 is large, a diffused lighting device that secures a wide diffusion angle can be realized. On the contrary, when the curvature formed by the periphery of the reflector 200 is large, it is concentrated toward the bottom of the illuminator. It is possible to realize a concentrated lighting device that is irradiated.

As described above, the reflector 200 has a double curvature structure, which makes it possible to easily diffuse the light emitted from the light emitter 100 without generating a dark part, and if necessary, changes the curvature of the reflector and changes the light emitter. Only by adjusting the distance to the (100) it is possible to implement a lighting device having a variety of irradiation angles and diffusion angles.

In this case, the color of the light emitted from the light emitting unit 100 may be changed by making the color of the surface (that is, the reflecting surface) facing the light emitting unit 100 of the reflecting plate 200 colored. There is a limit to the color of light emitted by the LED as a light source, thereby easily exceeding the color limit without dropping the illuminance.

On the other hand, the radiator 300 is in contact with the bottom surface of the light emitting unit 100, preferably is directly attached to the bottom surface of the light emitting unit 100 to receive and release the heat generated from the light emitting unit 100 directly.

In the lighting apparatus according to the prior art shown in FIG. It was.

On the other hand, in the reflective lighting apparatus according to the present invention shown in FIG. 3 (b), the heat dissipator 300 protrudes from the bottom of the light emitting part 100 to the bottom of the installation surface and is formed to be long, and the heat dissipation body 300 The airflow by buoyancy is easily formed by securing a space inside and outside of the blade).

The heat sink 300 is made of a material having high thermal conductivity, and has a form characteristic as shown in FIG. 1.

As shown in (c) and (d) of FIG. 1, the heat dissipator 300 has a plurality of heat dissipation fins 310 and 320 on the bottom thereof. The heat dissipation fins 310 and 320 are elongated in the vertical direction with respect to the bottom of the light emitting unit 100. According to FIG. 1C, a plurality of internal heat dissipation fins 310 are formed at the center of the bottom surface of the heat dissipator 300. It is formed in the form and is formed around the outer heat radiation fin 320 is spaced apart from the inner heat radiation fin 310 by a predetermined distance.

At this time, according to (d) of FIG. 1, the plurality of heat dissipation fins 310 and 320 are formed to be parallel to each other. The inner heat dissipation fins 310 have a straight cross section, and the outer heat dissipation fins 320 have a pentagonal cross section and have an inner heat dissipation fin 310. It can be seen that the longer than the external heat dissipation fin 320 is formed.

On the other hand, Figure 4 is a diagram showing the temperature and air flow distribution around the radiator 300, such as the cross-sectional shape of the internal heat dissipation fin 310 and the external heat dissipation fin 320 can be seen more clearly from the bar shown in FIG. have.

As shown in (a) of FIG. 4, heat is concentrated around the light emitting unit 100. The vertical heat dissipation fins 310 are formed longer than the external heat dissipation fins 320. ,

The external heat dissipation fin 320 has a pentagon-shaped cross section, but as shown in FIG. 4, the bottom side of the pentagon is raised upward, and the vertex is formed in an inverted form so as to be positioned at the bottom thereof, as shown in FIG. 4A. As shown below, when the airflow is generated by buoyancy from the bottom upward, both the airflow inside and outside the external heat dissipation fin 320 may be used.

As a result of the experiment, when the heat radiation fin is made of a straight structure only or closer to the heating surface, the outer diameter is reduced, the airflow generated by buoyancy cannot be used at all or the heating efficiency is remarkably low.

As described above, the heat dissipator 300 is formed to extend downward from the heat generating surface, and has a structure of the internal heat dissipation fin 310 and the external heat dissipation fin 320 as described above, thereby enabling natural heat generation by buoyancy.

In particular, as shown in (a) of FIG. 4, since the velocity of airflow flowing into and out of the heat dissipation fins 310 and 320 is about 0.01 m / s, there is little adhesion of dust as compared to forced convection. Considering gravity, it has a structure that does not accumulate dust, which can prevent deterioration in heat dissipation performance due to foreign matter.

Therefore, even if it is installed on a high ceiling difficult to maintain, it can be used for a long time without additional maintenance.

In addition, since the counterflow heat exchange is performed between the internal heat dissipation fin 310 and the external heat dissipation fin 320 due to the inflow airflow due to buoyancy, the heat generated in the light emitting unit 100 is easily discharged from the internal heat dissipation fin 310. 320 is delivered to the outside air. Therefore, the heat dissipation effect is excellent and the size of the heat dissipation fin can be reduced compared to the prior art, as well as can significantly extend the LED life.

Hereinafter, with reference to the accompanying drawings will be described the configuration of the reflective lighting apparatus according to this embodiment of the present invention.

FIG. 5 is an exploded perspective view of the reflective lighting apparatus according to this embodiment of the present invention, and FIG. 6 is a reference diagram illustrating a process in which countercurrent heat exchange is performed by buoyancy in the reflective lighting apparatus illustrated in FIG. 5.

This embodiment of the present invention further discloses a reflective lighting device for a street lamp, further from one embodiment of a lighting device inserted into a socket of an installation surface.

As shown in FIG. 6, the reflective plate 200 and the radiator 300 are integrally formed, and the light emitting unit 100 is mounted on the heat collecting plate 330. By integrally molding the reflector plate 200 and the radiator 300 with a material having excellent heat dissipation efficiency, the heat dissipation effect can be maximized and a separate assembly process can be omitted, thereby improving product reliability and lowering the manufacturing cost. As described above, the reflective plate 200 may be implemented by coating the reflective material such as mercury on the surface facing the heat collecting plate 330.

On the other hand, the reflecting plate 200 and the radiator 300 has a horizontally long shape and is connected by the side wall 340 vertically maintained to maintain a parallel state with each other.

In this case, the reflective plate 200 forms a convex curved surface toward the sidewall 340 toward the bottom, and a concave curved surface toward the sidewall 340 toward the opposite side. The reason why the reflective surface of the reflector 200 has a double curved surface is to adjust the diffusion angle and remove the dark portion as described in the above embodiment.

On the other hand, as shown in Figure 6 it can be seen that such a pair of reflective lighting devices are arranged in parallel so as to be rearward from each other by a predetermined distance.

Thus, by arranging a pair of reflective lighting devices so that the side walls 340 face each other, an inflow air flow due to buoyancy is formed in the space between the outer side of the heat sink 300 and the two side walls 340, so that the counter flow heat exchange is performed. Smooth heat dissipation is achieved.

On the other hand, according to the exploded perspective view of Figure 5 can be understood that such a pair of reflective lighting device is installed in the street light,

As shown in FIG. 5, the auxiliary reflecting plate 210 is provided at the front of the pair of reflective lighting devices so that there is no gap in securing the diffusion angle and removing the arm.

On the other hand, the socket inserting unit 400 is connected to the rear side, the socket inserting unit 400 is connected to the horizontal and the like to support the reflective lighting device and at the same time supplies power to the light emitting unit (100).

Thereafter, the transparent protective plate 500 is mounted in the space between the reflective plate 200 and the heat collecting plate 330.

When assembled and installed in the street lamp as shown in Figure 5, not only the radiator 300 is completely exposed to the outside air, but also the inflow air can easily move to the space between the two side walls 340 is maximized the heat dissipation effect .

Although the present invention has been described in detail with reference to some embodiments, the present invention is not limited to these embodiments and can be freely modified and practiced within the scope of the technical idea described in the claims.

1 is a view showing the appearance of a reflective lighting apparatus according to an embodiment of the present invention,

2 is a reference diagram conceptually illustrating a process in which light is reflected through a reflecting plate in the reflective lighting apparatus shown in FIG. 1;

3 is a reference diagram illustrating a form in which a reflective lighting apparatus according to the present invention and a lighting apparatus according to the prior art are inserted and installed on an installation surface;

4 is a diagram showing the temperature and air flow distribution around the heat sink;

5 is an exploded perspective view of a reflective lighting apparatus according to this embodiment of the present invention;

FIG. 6 is a reference diagram illustrating a process in which counterflow heat exchange is performed by buoyancy in the reflective lighting apparatus according to the embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100: light emitting unit

200: reflector

210: auxiliary reflector

300: radiator

310: internal heat radiation fins 320: external heat radiation fins

330: heat collecting plate 340: side wall

400: socket insertion part

500: transparent protective plate

Claims (8)

delete delete Light emitting unit 100 for emitting light; A reflector 200 positioned above the light emitter 100 and reflecting light emitted from the light emitter 100; And A radiator 300 in contact with a bottom surface of the light emitting part 100 and having a plurality of radiating fins extending a predetermined length in a vertical direction from a bottom of the light emitting part 100. The plurality of heat dissipation fins are composed of a plurality of inner heat dissipation fins 310 and a plurality of outer heat dissipation fins 320, The plurality of inner heat dissipation fins 310 have a longer vertical length than the outer heat dissipation fins 320, and the plurality of outer heat dissipation fins 320 are arranged along the outer side of the plurality of inner heat dissipation fins 310, but the bottom of the light emitting portion Reflective lighting device, characterized in that having the shape of a pentagonal plate parallel to the bottom surface. The method of claim 3, wherein The plurality of inner heat radiation fins 310 are arranged to form a circle around the bottom of the light emitting unit 100, and the plurality of outer heat radiation fins 320 are arranged to be spaced apart from the plurality of inner heat radiation fins 320 by a predetermined distance. Reflective lighting apparatus, characterized in that. Light emitting unit 100 for emitting light; A reflector 200 positioned above the light emitter 100 and reflecting light emitted from the light emitter 100; And A radiator 300 in contact with a bottom surface of the light emitting part 100 and having a plurality of radiating fins extending a predetermined length in a vertical direction from a bottom of the light emitting part 100. The radiator 300 extends from one side to the upper side and continues to one side of the reflector 200, wherein the reflector 200 and the radiator 300 are integrally formed. Reflective surface of the reflective plate 200 is a reflective illumination device, characterized in that the center of the convex curved surface toward the light emitting portion 100 toward the periphery to form a concave curved surface. Light emitting unit 100 for emitting light; A reflector 200 positioned above the light emitter 100 and reflecting light emitted from the light emitter 100; And A radiator 300 in contact with a bottom surface of the light emitting part 100 and having a plurality of radiating fins extending a predetermined length in a vertical direction from a bottom of the light emitting part 100. The reflective plate 200 is a reflective illumination device, characterized in that the colored reflector. Light emitting unit 100 for emitting light; A reflector 200 positioned above the light emitter 100 and reflecting light emitted from the light emitter 100; And A radiator 300 in contact with a bottom surface of the light emitting part 100 and having a plurality of radiating fins extending a predetermined length in a vertical direction from a bottom of the light emitting part 100. The reflection plate 200 extends a predetermined length in one direction, The heat dissipating member 300 is in contact with the bottom surface of the light emitting part 100, the heat collecting plate 330 extending a predetermined length in one direction to be parallel to the reflecting plate 200; A plurality of heat dissipation fins extending a predetermined length in a vertical direction from a bottom surface of the heat collecting plate 330; And a side wall 340 extending from one end of the heat collecting plate 330 in a vertical direction to the one end of the reflecting plate 200. The reflective surface of the reflective plate 200 forms a convex curved surface toward the light emitting unit 100 toward the sidewall 340 and a concave curved surface toward the opposite side of the sidewall 340. Device. A pair of reflective lighting apparatus according to claim 7 are arranged in parallel to be spaced apart from each other by a predetermined distance from the back, one end in the longitudinal direction of the pair of lighting devices is connected to the street lamp socket, the pair at the opposite end Reflective plate 200 having a semi-circular plane connecting the reflecting plate 210; Reflective lighting apparatus comprising a.

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