KR101130275B1 - LED lamp having dual heat-dissipation structure - Google Patents

Abstract

Disclosed are an LED lighting device having a water-cooled dual heat dissipation structure. LED lighting device having a water-cooled dual heat dissipation structure according to the present invention is a heat sink formed to have an inclined inclined angle toward the center; and a plurality of LED elements are emitted by the power supplied from the outside, the heat sink At least one LED substrate tightly fixed to the bottom surface; And a heat dissipation water pocket fixed to a position facing the LED substrate in an upper surface of the heat sink, and having a coolant filled therein. According to the present invention, it is possible to provide a high-efficiency lighting device suitable for low-carbon green growth because the lifespan and illumination of the LED element is increased by the high heat dissipation performance of the double heat dissipation structure.

LED element, LED board, heat dissipation, heat sink, heat dissipation water pocket, heat exhaust port, air circulation port

Description

LED luminaire with hand-cooled dual heat dissipation structure {LED lamp having dual heat-dissipation structure}

The present invention relates to an LED luminaire, and in particular, a water-cooled type that can efficiently dissipate heat generated from an LED substrate on which an LED element is mounted by water cooling through a heat-sink water pocket filled with cooling water along with air cooling through a heat sink. The present invention relates to an LED luminaire having a double heat dissipation structure.

Recently, various light emitting devices have been developed due to the development of electric and electronic technologies, and the representative light emitting devices include LED (Light Emitting Diode) devices.

The LED device is one of the solid state light emitting display devices, and the white light LED which can be applied to various fields as well as the monochromatic LED device which generates the light of the three primary colors of light (R), green (G) and blue (B). The device was developed.

The application field of the LED device is a light emitting source for a backlight of a display in a general display device, and recently, a high output of the LED device is enough to replace traditional lighting equipment such as incandescent lamps, fluorescent lamps and mercury lamps. Increasingly, its scope of use is expanding. In particular, since LED devices have the advantages of high efficiency and very long lifespan for converting electrical energy into light, they are spotlighted as lighting devices suitable for low-carbon green growth, which has emerged as a big topic these days.

However, there are some problems to be solved in the application of the LED device, one of which is to efficiently dissipate a large amount of heat generated in the process of emitting the LED device. First of all, the operating temperature of the LED element has a great influence on its life. According to the experiments, for LED devices with a lifespan of 100,000 hours at 50 ° C, when their operating temperatures are raised to 60 ° C, 70 ° C, 90 ° C, and 120 ° C, their lifetimes are 60,000 hours, 40,000 hours, 20,000 hours, and 10,000 hours, respectively. Decreases sharply. Therefore, it can be said that it is desirable to maintain the operating temperature of the LED device at least 60 ℃ or less based on these experimental results. In addition, the LED device has a characteristic that the higher the illumination intensity is lowered.

Although the price of LED devices is higher than that of conventional lighting fixtures, the wider application area is due to high energy conversion efficiency and long life, which is the biggest advantage of LED devices. There is no limit to the use of. In addition, since the heat dissipation of the LED device will become more serious as the high output of the LED device, which is an important task of the LED device development, matures, the heat dissipation problem of the LED device must be solved at any time.

It is an object of the present invention to provide an LED luminaire having a water-cooled dual heat dissipation structure capable of efficiently dissipating a large amount of heat generated from an LED substrate equipped with a light emitting LED element.

It is another object of the present invention to provide an LED luminaire that can be used as it is in real life by providing an intermediate cover, a light shielding cover, and a PC glove together with a water-cooled dual heat radiation structure.

LED luminaire according to the present invention is a heat sink formed to have a concave inclined angle toward the center; and a plurality of LED elements that are emitted by the power supplied from the outside is mounted, at least one or more closely fixed to the bottom surface of the heat sink LED substrate; And a heat dissipation water pocket fixed to a position facing the LED substrate in an upper surface of the heat sink, and having a coolant filled therein.

Preferably, at least a portion of the heat dissipation plate on which the LED substrate and the heat dissipation water pocket are mounted is formed in a plane.

In addition, the acute angle of the inclination angle of the heat sink to the horizontal plane may have a range of 5 ~ 8 °.

The heat dissipation plate may be made of aluminum, and the heat dissipation water pocket may be made of aluminum or stainless steel.

Meanwhile, the outer circumference of the heat dissipation plate may have a circular shape, and fastening holes may be formed at two points on the diameter, and the fastening hole may be coupled to an intermediate cover forming a space surrounding the heat dissipation water pocket.

At this time, it is preferable that a heat exhaust port is formed at the center of the intermediate cover, and a mesh can be installed at the heat exhaust port.

In addition, the present invention may further include a light shielding cover coupled to the upper surface of the intermediate cover.

The light blocking cover extends to the outer circumference of the heat sink, but is preferably spaced apart between the edge of the light shielding cover and the outer circumference of the heat sink to form an annular air circulation port.

In addition, the fastening hole may be further coupled to the spherical PC globe to form a space surrounding the LED substrate.

The LED luminaire of the water-cooled dual heat dissipation structure according to the present invention having the configuration as described above can effectively radiate a large amount of heat generated from the LED element through double heat dissipation of air cooling and water cooling, and thus, LED devices as well as the entire LED luminaire. It has the advantage of maximizing the lifespan and efficiency.

In addition, since the present invention can significantly lower the operating temperature of the LED device by efficient heat dissipation, it is possible to maintain the same level of illuminance even when supplying less energy than the prior art, and thus a small amount of energy lowers the operating temperature of the LED device. Has a synergistic effect in the forward direction.

In addition, the LED luminaire according to an embodiment of the present invention includes a heat sink, an LED substrate and a heat dissipation water pocket, and an intermediate cover, a light shielding cover, and a PC glove, which can maximize the lighting effect. Can be.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the LED luminaire according to the invention, in particular the LED luminaire 10 with a water-cooled dual heat dissipation structure.

In the description of one embodiment of the present invention, descriptions of well-known configurations that will be obvious to those skilled in the art will be omitted so as not to obscure the subject matter of the present invention. In addition, when referring to the drawings it should be considered that the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description.

Meanwhile, terms used to describe one embodiment of the present invention and define relative positions of front, rear, left, and right sides, etc., are used with reference to the accompanying drawings. It should be noted, however, that such definitions of relative positions may be altered in an equivalent arrangement without changing the essential parts of the invention.

1 is a side cross-sectional view of an LED luminaire 10 having a water-cooled dual heat dissipation structure according to the present invention, FIG. 2 is a bottom view of the LED luminaire 10 shown in FIG. 1, and FIG. 3 is shown in FIG. 1. 4 is a perspective view of the heat dissipation water pocket 300 included in the LED light fixture 10, and FIG. 4 shows an LED light fixture according to an embodiment in which the middle cover 400, the light shielding cover 500, and the PC globe 600 are further included. 10) is a side cross-sectional view.

As shown in Figure 1 and 2, the LED luminaire 10 according to the present invention largely comprises a heat sink 100, LED substrate 200 and a heat radiation water pocket (300).

The heat sink 100 is formed to have an inclined angle inclined toward the center. The inclination angle is for widening the illumination area by the light emission of the LED element 210 mounted on the LED substrate 200, it is appropriate that the acute angle (α) of the inclination angle to form a horizontal plane has a range of 5 ~ 8 °.

The LED substrate 200 is equipped with a plurality of LED elements 210 that are emitted by the power supplied from the outside, and is fixed in close contact with the bottom surface 100 "of the heat sink 100. LED substrate 200 is at least It is provided with one or more, and is fixed to the bottom surface 100 "of the heat sink 100 by a method such as screwing. If necessary, it is also preferable to apply thermal grease to the contact surface of the LED substrate 200 and the heat sink 100 to improve the heat transfer rate. In the embodiment of the present invention, the heat sink 100 is made of an aluminum material having good thermal conductivity.

The heat dissipation water pocket 300 is tightly fixed to a position opposite to a portion where the LED substrate 200 is fixed among the upper surfaces 100 ′ of the heat dissipation plate 100, and the cooling water is filled therein. Cooling water is filled through the water inlet 310 shown in FIG. The heat dissipation water pocket 300 is made of an aluminum material having good thermal conductivity or a stainless steel material resistant to corrosion and relatively easy to manufacture. The heat conduction grease on the contact surface with the heat sink 100 is the same as in the case of the LED substrate 200. May be applied.

Meanwhile, the heat sink 100 may be formed to be concave while forming a curved surface toward the center, but at least a part of the heat sink 100 on which the LED substrate 200 and the heat radiating water pocket 300 are mounted may be formed to form a plane. . This is for close contact between the LED substrate 200 and the heat dissipation water pocket 300 and the heat dissipation plate 100 more easily and reliably. As shown in FIG. 1 and FIG. 2, in the embodiment of the present invention, six LED substrates surrounding the LED substrate 200 in the middle of the top and bottom surfaces 100 'and 100 ″ of the heat sink 100 and the surroundings are formed in a regular hexagon. The part to which 200 is attached has comprised the plane.

In order to test the heat dissipation performance of the LED luminaire 10 having a water-cooled dual heat dissipation structure having the above configuration, the temperature of the upper and lower surfaces (100 ', 100 ") of the heat dissipation plate when there is no air cooling, that is, the heat dissipation water pocket 300 ( Table 1) and water cooling, that is, the temperature (Table 2) of the upper and lower surfaces (100 ', 100 ") of the heat sink when there is the heat radiation water pocket 300 was compared.

[Temperature on top and bottom of heat sink when there is no heat pocket]

[Temperature of the upper and lower surfaces of the heat sink when there is a heat dissipation pocket]

As can be seen from the experimental results, the heat radiation water pocket 300 is installed, compared to the case of heat dissipation by air cooling only, the LED substrate 200 and the lower surface of the heat sink 100 "temperature drop of 10 ℃, and the upper surface of the heat sink (100) ') Showed a temperature drop of 20 ° C. When the heat dissipation water pocket 300 was filled with 2 kg of coolant at room temperature of 4 ° C., it took about 130 minutes for the coolant to rise to 60 ° C. For about 130 minutes from the time there is little stress due to heat in the LED element 210 as well as the temperature rise is suppressed to the maximum by the water-cooled dual heat radiation structure thereafter, and thus the present invention LED device 210 It will have an excellent effect on life extension and roughness improvement.

On the other hand, Figure 4 shows an embodiment as a luminaire further includes an intermediate cover 400, the light shielding cover 500 and the PC globe 600 in the LED luminaire 10 of the present invention having the configuration as described above.

The middle cover 400 is to cover the upper surface (100 ') of the heat sink 100 to protect the inside, in the embodiment of the present invention shown in Figure 4 the outer periphery of the heat sink 100 forms a circular, the diameter of The fastening holes 110 are formed at two points, respectively, and the fastening holes 110 are coupled to the intermediate cover 400 forming a space surrounding the heat dissipation water pocket 300. The intermediate cover 400 is also preferably made of aluminum material having good thermal conductivity or stainless steel material resistant to corrosion and easy to manufacture. In this case, a heat discharge port 410 is formed at the center of the middle cover 400 so that the heat accumulated therein can be easily discharged to the outside. In addition, the heat discharge port 410 is provided with a net 420 to prevent insects from invading from the outside, and the middle cover 400 around the heat discharge port 410 is gently inclined downward to the dust It is recommended to configure it to fall naturally. The size of the intermediate cover 400 is preferably made large enough not to contact the heat dissipation water pocket 300.

In addition, the present invention may further include a light shielding cover 500 coupled to the upper surface of the intermediate cover 400 spaced apart. The light shielding cover 500 may be made larger than the middle cover 400 to surround the middle cover 400 to suppress a temperature increase inside the LED luminaire 10 by direct sunlight. In addition, the light shielding cover 500 extends to the outer periphery of the heat sink 100, in which case the space between the edge of the light shielding cover 500 and the outer periphery of the heat sink 100 is preferably formed to form an annular air circulation port 510. . Like the intermediate cover 400, the light shielding cover 500 is made of aluminum or stainless steel, and if necessary, the outer surface may be mirror-treated to suppress the absorption of direct sunlight as much as possible.

In addition, the fastening hole 110 may be further coupled to the spherical PC globe 600 to form a space surrounding the LED substrate 200. The PC glove 600 is preferably made of a transparent or translucent synthetic resin material.

And, although not shown in the drawings, when the LED lighting device 10 of the present invention is installed outdoors, it is surrounded by rubber packing on the contact surface between each of the middle cover 400 and the PC glove 600 and the heat sink 100 outside the rainy weather It is preferable to prevent rainwater from infiltrating.

While the preferred embodiments of the present invention have been illustrated and described above, it will be apparent to those skilled in the art that the present invention may be modified without departing from the spirit or spirit of the present invention. . Therefore, the scope of the present invention will be defined by the appended claims and equivalents thereof.

1 is a side cross-sectional view of an LED luminaire having a water-cooled dual heat dissipation structure according to the present invention.

2 is a bottom view of the LED luminaire shown in FIG. 1.

3 is a perspective view of a heat radiation water pocket included in the LED luminaire shown in FIG.

4 is a side cross-sectional view of an LED luminaire according to an embodiment further comprising an intermediate cover and a shading cover and a PC globe.

Description of the Related Art

10: LED luminaire

100: heat sink 100 ': upper surface of the heat sink

100 ": Lower surface of heat sink 110: Fastening hole

200: LED substrate 210: LED device

300: heat dissipation water pocket 310: water inlet

400: middle cover 410: heat exhaust

420: mesh 500: shading cover

510: air circulation port 600: PC glove

α: inclination angle of the heat sink

Claims (11)

A heat sink formed to have an inclined angle concave toward the center; At least one LED substrate mounted with a plurality of LED elements emitting light by a power supplied from the outside, and fixedly attached to a bottom surface of the heat sink; And A heat dissipation water pocket fixed to a position opposite to the LED substrate in an upper surface of the heat dissipation plate and filled with coolant therein; An intermediate cover which forms a space surrounding the heat dissipation water pocket and is coupled to an outer circumference of the heat sink; A heat outlet formed in the center of the intermediate cover; A net provided at the heat exhaust port; And And a light shielding cover coupled to an upper surface of the intermediate cover to form an annular air circulation port between the outer circumference of the heat sink. The method of claim 1, The heat sink is an LED lamp, characterized in that the at least a portion on which the LED substrate and the heat dissipation pocket is mounted in a plane. The method of claim 1, LED alumina, characterized in that the acute angle of the inclination angle of the heat sink to the horizontal plane is 5 ~ 8 °. The method of claim 1, The heat sink is an LED lamp, characterized in that the aluminum material. The method of claim 1, The heat dissipation water pocket is LED light, characterized in that the aluminum material or stainless steel material. delete delete delete delete delete delete

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