KR20090026380A - A led lighting fitting with jump heat sink - Google Patents

Abstract

An LED lighting fixture is provided to release the central part or the edge of the heat sink rapidly by forming the bridge connected jump as the outer ring. An LED lighting fixture comprises an optical source section, a heat-resisting unit, and a housing(50). The optical source section comprises one or more LEDs(11) and an LED mounting PCB(Printed Circuit Board)(13). The heat-resisting unit comprises a heat radiation fin(33) emitting the heat of the optical source section and the heat sink welded into the LED mounting PCB. The housing comprises a power supply connector(51) combining with the heat-resisting unit. The LED lighting fixture more includes a jump heat-resisting unit(30). A jump heat-resisting unit comprises a bridge(35) connected to the outermost in the central part of the heat sink. A bridge post(312) is protruded from the central part of the heat sink.

Description

LED luminaire with jump heat dissipation means {A LED LIGHTING FITTING WITH JUMP HEAT SINK}

The present invention relates to an LED lighting device, and in particular, the heat dissipation means is provided with a bridge connecting the jump from the center of the heat absorbing portion to the outside, the heat dissipation of the central portion or the outer portion of the heat absorbing portion is evenly and quickly to prevent the LED thermal damage and The present invention relates to an LED lighting device having jump radiating means for significantly improving the quality characteristics.

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 lowered. Thus, the above advantages of the LED lighting device presuppose the condition that the high heat of the LED is radiated smoothly.

The upper limit of the temperature on which the LED life is influenced is about 55 ° C., and thus the success or failure of the LED lighting device is directly related to heat dissipation.

In general, the LED lighting device is composed of a light source unit to which a plurality of LEDs are installed in the PCB, the heat dissipation means is bonded to the PC and the housing for receiving the light source and the heat dissipation means, the power connection for connecting the PC and power to the housing It is provided and configured.

As shown in FIGS. 7 and 8, the heat dissipation means 130 according to the related art has a plurality of heat dissipating portions 131 and the outer periphery of the heat absorbing portions 131 having a disc shape connected to the PCB 113. The heat radiation fins 133 are integrally formed to protrude in the form of a fence.

When the LED 111 is turned on, the heat generated from the PC 113 is transferred to the outer circumference of the heat absorbing portion through the heat absorbing portion 131, and is sequentially transmitted from the outer circumference to the heat dissipation fin 133, thereby exposing the cooling heat exchange to the outside air. It is made at the outer periphery of the heat absorbing part and the heat radiation fin.

Hereinafter, for convenience of description, the heat absorbing part 131 is divided into a 'center part (a)', 'outer part (c)', and a 'radial middle section (b)' located between the center part and the outer part.

Looking at the heat dissipation process of the heat absorbing portion 131 in more detail, the heat is moved in the order of the center portion (a) → the middle radius section (b) → the outer portion (c) → the heat dissipation fins 133 while cooling heat exchange is performed at the same time. The endotherm from the light source unit 110 continuously progresses in the central portion (a), the radial intermediate section (b), and the outer portion (c) which are all sections of the section 31.

As such, the heat of the heat absorbing portion 131 central portion (a) in contact with the PC 113 is transmitted to the outer periphery and the heat dissipation fin 133 only through the middle radius b, and the radius mid section b and the outer portion ( Even in c), the endotherm continues to be heat-retained at all times, regardless of how much the heat exchange is continued at the outer periphery of the heat absorbing portion 131 and the heat dissipation fin 133.

Therefore, even when the LEDs 111 having the same wattage (W) level are mounted on the PC 113, a phenomenon in which the LED disposed at the center portion a is rapidly damaged by the temperature difference between the center portion and the outer portion of the heat absorbing portion may occur. appear.

For this reason, in the high-watt (W) class LED lighting fixtures, the brightness is reduced, so that the number of LEDs need to be increased unnecessarily to meet the set illumination, and thus, the energy cost is increased and the number of LEDs increases, leading to a problem in manufacturing cost.

When the thickness of the heat absorbing portion is increased for this problem, the heat dissipation rate may be increased, but such a configuration has a problem in that the raw material is excessively consumed and the manufacturing cost is wasteful.

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

An object of the present invention is provided with a bridge for the jump connection from the center of the heat absorbing portion to the outside of the heat absorbing means is equally and fast heat dissipation in the center or the outer portion of the heat absorbing portion to prevent the LED thermal damage and significantly improve the quality characteristics of the LED lighting fixture The present invention provides an LED lighting device having a jump heat dissipation means.

LED lighting device having a jump heat dissipation means according to the present invention for achieving the above object is

A light source unit including at least one light emitting diode (LED) and an LED mounting PC, and a heat dissipation fin is formed around the heat absorbing unit joined to the LED mounting PC, and coupled with heat dissipation means for dissipating heat from the light source unit. In the LED lighting device is provided with a housing having a power connection,

It characterized in that it comprises a jump heat dissipation means having a bridge connected to the outermost in the heat absorbing portion central portion to transfer the heat of the heat absorbing portion central portion of the heat absorbing portion radius (jump) to the outside.

LED lighting device having a jump heat dissipation means according to the present invention having the above-described configuration is provided with a bridge to the jump connection from the center of the heat absorbing portion to the heat dissipation means by the heat dissipation of the central portion or the outer portion of the heat absorbing portion evenly and quickly It has an excellent effect of preventing damage and significantly improving the quality characteristics of LED lighting fixtures.

Hereinafter, with reference to the accompanying drawings an embodiment of an LED lighting device having a jump radiating means of the present invention will be described in more detail.

1 is a cross-sectional view showing the configuration of an embodiment according to the present invention, Figure 2 is an exploded view of the jump radiating means in Figure 1, Figure 3 is a combined plan view of FIG.

As shown in Figures 1 to 3, the LED lighting device 1 with a jump heat dissipation means of one embodiment according to the present invention includes one or more LED (Light Emitting Diode) (11) and LED mounting PC The heat dissipation fin 33 is formed around the heat absorbing portion 31 joined to the light source unit 10 and the LED mounting PC 13, and is combined with heat dissipation means for dissipating heat from the light source unit 10 and the heat dissipation means. In the LED lighting device is provided with a housing 50 having a power connection portion 51, the heat of the heat absorbing portion 31 central portion (a) jumps to the outer end of the heat absorbing portion radius intermediate section (b) In order to comprise a jump heat dissipation means 30 is provided with a bridge (35) connected to the outermost in the heat absorbing portion (31) center.

That is, the bridge 35 is added to the main body (30a) consisting of the heat dissipation portion 31 and the heat dissipation fin (33).

Here, the jump heat dissipation means 30 is a pier 312 is integrally protruded in the central portion of the heat absorbing portion 31, the stepped portion 332 protrudes inward to the heat dissipation fin 33, the bridge 35 is Preferably, the pier 312 and the plate 352 connect the stepped portion 332.

As one embodiment according to the present invention, as shown in Figure 4 to 6, the jump heat dissipation means 30 is a bridge 35 is a plurality of heat dissipation fin ( 33 may be a linear bridge 354 connected to any one of the heat radiation portion 31 and the heat radiation fin 33 to be radially disposed.

The bridge 35 is made of copper, aluminum, or the like having high thermal conductivity, and is integrally assembled by various methods such as attaching or screwing together with the main body 30a through an adhesive or thermally conductive adhesive.

The bridge 35 may be integrally formed with the main body 30a.

In addition, the jump heat dissipation means 30 has a circumferential wall 32 extending downwardly around the heat absorbing portion 31 to form a light source unit installation space 37, and the temperature sensor mounting groove 314 in the heat absorbing portion 31. And a cable through hole 316 is formed.

On the other hand, the light source unit 10 is preferably a metal PC ratio of high thermal conductivity is adopted. In the drawing (Fig. 1), reference numeral 70 denotes an LED light induction diffusion means.

It looks at the operating state of the LED lighting device (1) having a jump radiating means according to the present invention having the above configuration.

The jump heat dissipation means 30 according to the present invention is provided with a bridge 35 connected from the center of the heat absorbing portion 31 to the outermost portion, so that the heat of the heat absorbing portion central portion (a) jumps directly to the radius intermediate section (b) to cool it directly. Since the heat transfer is delivered to the heat dissipation fin 33, the heat dissipation is made evenly and quickly.

That is, the heat of the heat absorbing portion 31 central portion (a) is jumped and transferred to the heat radiating fins of the outer portion without passing through the radial middle section (b) and the outer portion (c), so that the cooling heat exchange is made, the central portion (a) or the radius outer portion ( The temperature in c) is equally cooled and heat exchanged to effectively radiate heat.

Thus, the present invention is provided with the bridge 35 in the heat dissipation means is equally rapid heat dissipation of the central portion or the outer portion of the heat absorbing portion 31 to prevent the LED thermal damage and significantly improve the quality characteristics of the LED lighting fixtures.

In addition, the heat dissipation rate is further accelerated by the use of a metal PC made of a metal material having a high thermal conductivity such as aluminum.

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 the common or dictionary meanings, but should be interpreted as meanings and concepts corresponding to 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.

1 is a cross-sectional view showing the configuration of an embodiment according to the present invention

Figure 2 is an exploded view of the heat dissipation means in Figure 1

3 is a plan view of the combination of FIG.

Figure 4 is a cross-sectional view of the heat radiation means of one embodiment according to the present invention

5 is a plan view of FIG.

Figure 6 is a cross-sectional view of the heat radiation means of one embodiment according to the present invention

Figure 7 is a cross-sectional view of the heat radiation means of one embodiment of the prior art

8 is a plan view of FIG.

* Explanation of symbols for the main parts of the drawings

1: LED lighting device having a jump heat dissipation means of the present invention

10: light source unit 11: LED 13: PCB

30: heat dissipation means 31: heat absorbing portion 312: piers

314: temperature sensor mounting groove 316: cable hole 32: main wall

33: heat radiation fin 332: stepping portion 35: bridge

40: power supply control unit 50: housing 51: power connection

Claims (3)

A heat dissipation fin 33 is formed around the light source unit 10 including one or more LEDs (LEDs) 11 and LED mounting PCs and the heat absorbing unit 31 bonded to the LED mounting PCs 13. In the LED lighting device is provided with a heat dissipation means for dissipating heat of the light source unit 10 and the housing 50 is coupled to the heat dissipation means and provided with a power connection portion 51, The bridge 35 is connected to the outermost part of the heat absorbing part 31 in the outermost part in order to jump the heat of the heat absorbing part 31 to the outer part of the heat absorbing part radius middle section b. LED lighting device having a jump heat dissipation means, characterized in that it comprises a jump heat dissipation means (30). The method according to claim 1, The jump heat dissipation means 30 is a pier 312 is integrally formed in the central portion of the heat absorbing portion 31 and the stepped portion 332 is formed to protrude inward to the heat dissipation fin 33, The bridge 35 is an LED lighting device having a jump radiating means, characterized in that consisting of a plate body 352 connecting the pier 312 and the stepped portion (332). The method according to claim 1, The jump heat dissipation means 30 is a heat absorbing portion 31 is a bridge (35) is a linear bridge (354) connected to any one of the plurality of heat dissipation fins (33) by jumping at the central portion of the heat absorbing portion (31) And LED lighting device having a heat radiating means characterized in that it is radially disposed on the heat radiation fin (33).

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