KR20090001140A - Heat release led lighting fitting without fan - Google Patents

Abstract

A heat dissipation LED lighting fixture without a fan is provided to prevent high heat generation by automatically short-circuiting power source in case performance of protection against heat is degraded. A heat dissipation LED lighting fixture without a fan comprises a heat-resisting unit. The heat-resisting unit is made of a single main disc for removing heat(30A). The main disc for removing heat is formed around an optical source section. The main disc for removing heat has the form of a leveling plate. The main disc for removing heat is made of a heat absorbing unit(31) and a radiating unit. The heat absorbing unit is contacted with a PCB(Printed Circuit Board) mounting an LED(Light Emitting Diode). The radiating unit is expanded to outside from the heat absorbing unit.

Description

Heatless LED LIGHTING FITTING WITHOUT FAN}

1 is a block diagram of an embodiment according to the present invention

Figure 2 is a perspective view of the main heat dissipation disk of Figure 1

3 is a block diagram of an embodiment according to the present invention

4 is a block diagram of an embodiment according to the present invention

5 is a block diagram of an embodiment according to the present invention

6 is a plan view taken from the main heat radiation disk of FIG.

7 is a block diagram of a prior art

FIG. 8 is a bottom view of FIG. 7

* Explanation of symbols for the main parts of the drawings

1: Fanless heat dissipation LED lighting fixture of the present invention

10: light source unit 11: LED 13: LED mounted PC

21: temperature sensor 15: second PC ratio 30: heat dissipation means

30A: main heat dissipation disk 31: heat absorbing portion 312: power cable through

33: flange type heat dissipation portion 331: scratch 333: heat dissipation fin

30B: auxiliary radiating member 50: housing 51: power connection

71: fixing means 73: spacer 75: fastening ring

The present invention relates to an LED luminaire, and in particular, the heat dissipation means is composed of a single main heat dissipation disk in the form of a horizontal plate formed around a light source unit, so that the heat dissipation is smoothly provided even in a non-ventilated space without a ventilation fan. The present invention relates to a fanless heat dissipation LED lighting device that effectively performs heat dissipation according to LED lighting to maximize the life and quality characteristics of the device.

LED (Light Emitting Diode) is smaller and longer lifespan than conventional light sources, and because electric energy is directly converted into light energy, it consumes less power, emits high brightness with high energy efficiency, and has fast response characteristics. Various lighting fixtures using LEDs as light sources have been developed.

 On the other hand, since the heat is generated when the LED is turned on, and the heat dissipation is not smooth, the life of the LED is shortened and the illuminance is reduced, so the above advantages of the LED lighting fixture presupposes the condition in which the high heat of the LED is radiated smoothly.

The upper limit of the temperature at which such LED lighting is smooth is about 60 ° C., and thus the success or failure of the LED lighting device is directly connected to heat dissipation.

As shown in FIGS. 7 and 8, the conventional LED lighting device 100 includes a light source unit in which a plurality of LEDs 111 are installed in the PC 113, heat dissipation means 130 and the light source unit bonded to the PC. Comprising a housing 150 for receiving the heat dissipation means, the housing is provided with a power connection portion 151 for connecting the PC 113 and the power.

In addition, the heat dissipation means 130 has a heat dissipation fin 133 radially from the center around the housing, and a plurality of heat dissipation fins 133 and the heat dissipation fin gap space 131 are alternately arranged.

That is, in the prior art, the heat dissipation means 130 has a cylindrical or conical shape in which the heat dissipation fins 133 and the gap spaces 131 are arranged at regular intervals, and in such an environment, the heat dissipation fins 133 are formed in an environment where ventilation is smoothly performed. Excellent surface heat dissipation effect.

However, in an environment in which ventilation is not naturally achieved, for example, when a luminaire is inserted into an indentation hole formed in a ceiling, a space between a lower point 133a adjacent to the PC 113 and an upper point 133b farthest from the PC is required. The temperature difference stays less than 10% (see FIG. 7).

In addition, the temperature difference between the heat dissipation fin 133 and the gap space 131 is less than 10% (see Fig. 8).

The heat dissipation heat exchange efficiency increases as the temperature difference between the heat dissipation fin 133 and the gap space 131 increases, but the heat dissipation means of the related art has a slight difference in temperature between the lower point 133a or the far upper point 133b near the PC. As you can see, it is actually losing heat.

This is because the air staying in the heat radiation fin gap space 131 is in a stagnant state with heat, and thus the outermost portion of the gap space 131 that acts as a surface area of the heat radiation fin 133 has a very limited depth. Except for the remaining portion (131a) is actually heat dissipation.

Therefore, in an environment where ventilation is not performed, no matter how large the surface area expansion by the heat radiation fins 133 and the gap space 131 is formed, in actuality, the surface area does not exert the same effect as the surface area is not expanded.

In addition, since the base and the heat dissipation fins are concentrated close to the PCB, which is the heat generating source, the radiating heat is radiated to each other to reduce the heat dissipation efficiency.

Due to this heat dissipation problem, in the prior art, the current flows to the PCB to reduce the heat load. However, in this case, since the brightness of the LEDs decreases, the number of LEDs must be increased so that the illumination intensity of the lighting fixture can be adjusted accordingly. Since energy is wasted and the number of LEDs increases, manufacturing cost increases.

Therefore, in one embodiment of the prior art, a blowing fan is installed in the inner space of the heat dissipation means.

However, the life of the LED is about 50,000 hours, whereas the life of the blower fan is about 10,000 hours, which causes a fatal problem that significantly shortens the life of the LED lighting fixture due to the blowing fan. This is impossible.

In addition, since dust is deposited on the surface of the heat radiating means due to the blowing, the heat radiating efficiency is reduced.

In addition, when installed outside, moisture, worms, dust, etc. may enter the lamp through the air passage formed in the heat dissipation means and damage the blower fan. There was a problem that the installation scope is limited to indoors.

The present invention has been made to solve the above problems,

An object of the present invention is a heat dissipation means is composed of a single main heat dissipation disk of the horizontal plate type formed around the light source unit having a wide heat dissipation that can be smoothly radiated even in a non-ventilated space without ventilation, the heat dissipation according to LED lighting without a fan The present invention provides a fanless heat dissipation LED luminaire that effectively performs to maximize the life and quality characteristics of the device.

Another object of the present invention is a dust-free fan is deposited to the heat radiating means, the heat dissipation performance is degraded or the ambient temperature is high, so that the power is automatically shorted when the temperature exceeds the set temperature upper limit to prevent high heat generation in advance and to facilitate the management ( No fan) It is to provide heat dissipation LED lighting fixtures.

Fanless heat dissipation LED lighting device according to the present invention to achieve the above object is

A light source unit including one or more LEDs (LEDs) and LED-mounted PCs and a heat dissipation unit connected to the LED-mounted PCs to radiate heat from the light source unit, and a housing having a power connection unit coupled to the heat dissipation unit. In the LED lighting fixture configured by

The heat dissipation means is composed of a single main heat dissipation disk in the form of a horizontal plate formed around the light source,

The main heat dissipation disk is characterized in that it is formed of a heat absorbing portion in contact with the LED-mounted PCB and a flange-type heat radiating portion that extends outwardly protruded from the heat absorbing portion.

Hereinafter, an embodiment of a fanless heat dissipation LED lighting fixture of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a configuration diagram of an embodiment according to the present invention, Figure 2 is a perspective view of the main heat dissipation disk of Figure 1; 1 and 2, the fanless heat dissipation LED lighting device 1 of one embodiment according to the present invention includes at least one LED (Light Emitting Diode) 11 and an LED mounted PC. Is coupled to the light source unit 10 and the LED-mounted PC 13 including a heat dissipation means 30 and the heat dissipation means 30 for dissipating heat of the light source unit 10 and the power connection portion 51 is provided In the LED lighting device comprising a housing 50, the heat dissipation means 30 is composed of a single main heat dissipation disk (30A) of the horizontal plate shape formed around the light source unit 10, the main heat dissipation The disk 30A is formed of a heat absorbing portion 31 in contact with the LED-mounted PC 10 and a flange-type heat dissipating portion 33 extending outward from the heat absorbing portion 31.

Here, the heat absorbing portion 31 and the flange type heat dissipating portion 33 of the main heat dissipating disk 30A are formed in a thin, flat unitary body.

In addition, the flange type heat dissipation part 33 may be inclined or curved downwardly or upwardly. According to this configuration, the main heat dissipation disk 30A forms a lampshade.

In addition, the flange-type heat dissipation portion 33 is preferably scratched on the surface is formed densely irregularities.

The scratch 331 preferably has a cross section in the form of a V-groove, and the V-groove may have a rectangular isosceles triangle shape. The portion perpendicular to the right isosceles triangle means the vertex angle α of the V-groove.

The vertex angle α of the heat dissipation unit is preferably formed to about 110 ° ~ 60 °.

The scratch 331 may be formed only on the front or the rear of the flange-type heat dissipation unit 33 or both the front and the rear.

The scratches 331 may be arranged in a concentric manner, and have irregularities having a very small depth of scratch level, and are completely different from the relative large-scale irregularities consisting of a heat radiation fin and a heat radiation fin gap in the prior art.

As one embodiment according to the present invention, as shown in Figure 3, one or more auxiliary heat dissipation member (30B) may be additionally provided on the upper or lower portion or the upper and lower portions of the main heat radiation disk (30A).

The auxiliary heat dissipation member 30B is preferably in the form of a cup Cup and is detachably formed on the main heat dissipation disk 30A.

The auxiliary heat dissipation member (30B) is formed in the shape of a cup having a bottom surface is cut and scratches (331), the main heat dissipation disk (30A) is preferably connected or glued to the heat conduction effectively, aluminum spacer ( 73) or may be fixed to the aluminum fastening ring (75).

The auxiliary heat dissipation member 30B is usefully used to form a smaller diameter of the main heat dissipation disk. As shown in FIG. 4, when the sub heat dissipation member 30B is mounted under the main heat dissipation disk 30A, the light of the LED is directed to the side. It also serves as a lampshade that collects so as not to spread widely.

As an embodiment according to the present invention, as shown in Figure 5 and 6, the flange-shaped heat dissipation portion 33 is a plurality of heat dissipation fins 333 radially protruding, the heat dissipation fin 333 is a height It is preferable that the heat absorbing portion 31 is formed in a rib shape gradually lowering outward from the adjacent portion. The heat dissipation fin 33 is formed sparingly unlike the prior art.

In addition, the main heat dissipation disk (30A) is a temperature sensor 21 is installed on the heat absorbing portion 31, the control of the setting so that the lighting of the LED 11 is turned off (OFF) when the temperature sensor 21 detects high temperature Is preferred.

On the other hand, the main heat dissipation disk 30A is formed in the heat absorbing portion 31, a plurality of fixing holes 314 for fastening through the power cable through hole 312 and the separate fixing means 71.

In addition, a second PC 15 on which the electronic device is mounted is installed on the main heat dissipation disk 30A, and a spacer 73 for forming a temperature sensor installation space on the main heat dissipation disk 30A, and A fastening ring 75 may be provided to hold the LED-mounted PC 13 under the main heat dissipation disk 30A.

In FIG. 1, reference numeral 80 denotes light induction diffusion means for converting the point light of the LED into the surface light.

Look at the working state of the fanless heat dissipation LED lighting device 1 according to the present invention having such a configuration.

A feature of the present invention is that the heat dissipation means 30 is formed in a flat disk shape, and in particular, the heat dissipation portion is in the form of a flange, that is, in the form of a plate without barriers to stagnate outside air in a windless environment, so that the heat dissipation is smooth.

That is, as in the prior art, the heat dissipation portion is formed in a cylindrical or conical shape in which the heat dissipation fins are densely vertically formed, and in the case of a windless environment, the heat is stagnated between the heat dissipation fins so that the actual heat dissipation surface is only the area of the bottom and the outer circumferential surface of the cylinder. Since the main heat dissipation disk 30A is prevented from stagnating heat even in a windless environment, both front and rear surfaces of the flange-type heat dissipation part 33 operate as heat dissipation areas.

In addition, the flange-shaped heat dissipation portion 33 of the main heat dissipation disk (30A) has a radius is extended and protrudes in the direction gradually away from the LED-mounted PC (13) as a heat generating source to discharge the heat far more excellent heat dissipation efficiency. .

By such a configuration, the main heat dissipation disk 30A sufficiently performs heat generation due to LED lighting even in a non-ventilated environment in which a blowing fan is not provided.

In addition, if the scratch 331 is formed to further expand the heat dissipation area on the surface of the flange-shaped heat dissipation portion 33 to prevent heat stagnation, heat dissipation efficiency is further increased.

이므로 V홈으로 인한 표면적 확장률은 빗변 길이의

가 되고 이러한 V홈이 연속형성되므로 방열부의 표면적 확장율은 결국 약 1.414배로 된다. The scratch 331 is formed so that the depth is shallow enough to scratch the outside air to prevent heat stagnation and increase the heat dissipation area, for example, the scratch 331 is made of an isosceles triangular V-groove and the scratch vertex angle at a right angle When the length of the hypotenuse L1 of the V-groove is 2, the lengths of both equilateral L2 are respectively

Therefore, the surface area expansion rate due to the V groove is

Since the V-groove is continuously formed, the surface area expansion ratio of the heat dissipation part is about 1.414 times.

In addition, when the apex angle α is 60 °, the heat dissipation area is doubled.

If the pitch of the V groove is reduced, even if the vertex angle α is reduced, the heat radiation area that prevents heat stagnation in the V groove is increased in a condition that the depth from the surface to the vertex is shallow so that outside air can pass.

Here, when the apex angle α of the V-groove is formed at an acute angle, for example, 15 °, the expansion ratio of the surface area is increased compared to the hypotenuse L1, but a dead-space space in which heat is stagnant may be formed, and vice versa. When formed at this obtuse angle, the effect of preventing heat retention is increased, but the surface area expansion rate is lowered.

According to the present invention, since the V-groove scratch 31 having a vertex angle α of about 110 ° to 60 ° is continuously formed in the heat dissipation part, the heat dissipation according to the LED lighting can be smoothly performed without a fan in a non-ventilated air congestion environment. To help.

According to the present invention, the scratches 331 are continuously formed in the heat dissipation unit so that the surface area is expanded and air congestion is prevented, so that the heat dissipation according to the LED lighting can be performed smoothly without a fan in a non-ventilated air congestion environment.

In addition, when the auxiliary heat dissipation member 30B is additionally installed on the main heat dissipation disk 30A, the heat dissipation capacity can be further increased to cope with the high output heat of the tube member. In particular, when the auxiliary heat dissipation member is mounted below the main heat dissipation disk 30A. It functions as a lampshade that prevents the widespread diffusion of light while improving heat dissipation performance.

The present invention is expected to be able to solve the problem of adversely affecting the surrounding crop ecology due to the street light that emits a wide range even in the recent night.

On the other hand, when dust is deposited on the heat radiating means 30 and the heat radiating performance is degraded or the ambient temperature is high and the set temperature upper limit is exceeded, the power is automatically shorted by the temperature sensor 21 and LED lighting is turned off. By causing the problem to be displayed externally, high heat generation is prevented and management is easy.

In the above, preferred embodiments of the present invention have been described with reference to the accompanying drawings. Here, the terms or words used in the present specification and claims should not be construed as being limited to ordinary or dictionary meanings, but should be construed as meanings and concepts consistent with the technical spirit of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

As described in detail above, the fanless heat dissipation LED lighting fixture according to the present invention is a heat dissipation means is composed of a single main heat dissipation disk of the horizontal plate form the center of the light source is formed in the light source smoothly heat dissipation By providing a wide heat dissipation unit is made to effectively perform the heat dissipation according to the LED lighting without a fan, there is an excellent effect to maximize the life and quality characteristics of the device.

In addition, when dust is deposited on the heat radiating means, the heat dissipation performance is deteriorated or the ambient temperature is high, so that the power supply is automatically shorted when the temperature exceeds the set upper limit, thus preventing the occurrence of high heat and facilitating management.

Claims (7)

A heat dissipation means 30 bonded to a light source unit 10 including one or more LEDs (LEDs) 11 and LED mounted PCs and the LED mounted PCs 13 to release heat from the light source unit 10; In the LED lighting device is coupled to the heat dissipation means 30 and comprises a housing 50 is provided with a power connection portion 51, The heat dissipation means 30 is composed of a single main heat dissipation disk (30A) of the horizontal plate form formed around the light source unit 10, The main heat dissipation disk 30A is formed of a heat dissipation portion 31 in contact with the LED-mounted PC 10 and a flange-shaped heat dissipation portion 33 extending outward from the heat dissipation portion 31. fan heat dissipation led lighting fixture The method according to claim 1, The flange type heat dissipation unit 33 is a fanless heat dissipation LED lighting fixture, characterized in that the inclined or curved formed downward or upward. The method according to claim 1 or 2, The flange-type heat dissipation unit 33 is a fan-free heat dissipation LED lighting fixture, characterized in that the scratch 331 is densely formed on the surface. The method according to claim 1, Fanless heat dissipation LED lighting device, characterized in that at least one auxiliary heat dissipation member (30B) is further provided on the upper or lower portion or the upper and lower portions of the main heat dissipation disk (30A). The method according to claim 4, The auxiliary heat dissipation member (30B) is a cup (Cup) form and is a fanless heat dissipation LED lighting fixture, characterized in that formed on the main heat dissipation disk (30A) detachable. The method according to claim 1 or 2, A plurality of heat dissipation fins 333 radially protrude from the flange-type heat dissipation portion 33, and the heat dissipation fins 333 are formed in a rib shape in which a height is gradually lowered outward from an adjacent portion of the heat absorbing portion 31. Fanless heat dissipation LED lighting fixtures. The method according to claim 1, The main heat dissipation disk 30A is provided with a temperature sensor 21 on the heat absorbing portion 31, and the fan is characterized in that the temperature sensor is set and controlled so that the LED lighting is turned off (OFF) when detecting the high temperature. Heat-resistant LED lighting fixtures.

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