KR20190033931A - Cooling unit for LED lighting - Google Patents

Abstract

According to the present invention, a cooling device for led lighting comprises: a receiving part in which at least three LED modules having a plurality of LEDs mounted on a print board are positioned and fixed; and cooling parts which are coupled to the receiving part. The cooling device is coupled to be provided in a case and assembled as a lighting. In the receiving part, a first flat plate is made of metal such as aluminum alloy having excellent heat dissipation and has first protrusions formed on four corners of the receiving part and having first engaging holes so as to engage with the cooling parts. In the cooling part, a second flat plate is formed to be spaced apart from the first flat plate of the receiving part at a predetermined interval to face each other and has second protrusions formed on four corners and having second engaging holes so as to engage with the receiving part. On a lower surface of the first flat plate, first inclined surfaces are formed. On a lower surface of the second flat plate, second inclined surfaces are formed to be inclined upward from the side such that the thickness gradually increases from both sides toward a central portion thereof. The second inclined surfaces are assembled in opposition to the first flat plate to form an air flow path such that a rapid air flow is induced. On an upper surface of the second flat plate, a cooling member is fixed in conformity with a plurality of inducing holes punched in a predetermined arrangement to guide cooling air. In the center of the cooling member, through holes corresponding to the inducing holes and having the diameter narrowing from the top to the bottom are formed to induce the rapid air flow.

Description

Cooling unit for LED lighting [0001]

The present invention relates to a radiator for an LED illuminator, and more particularly, to a cooling apparatus for an LED lighting lamp that achieves an intensive cooling structure that induces smooth flow of cooling air from outside to the interior of an LRD lamp to enhance cooling efficiency.

Generally, heat dissipation of an LED lighting lamp depends on a radiator formed of a metal supporting plate made of aluminum or the like having high thermal conductivity provided adjacent to the LED substrate, and a radiating member having radiating fins of any shape integrally joined with the metallic supporting plate .

However, there is a limitation in achieving the desired heat dissipation effect with such a configuration, so an attempt has been made to artificially form the air flow in such a manner as to solve the problem.

In view of this fact, a representative example of the prior art is disclosed in Patent Document 10-1496225 (Feb. In this disclosure, the heat dissipating unit 1 has a plurality of heat dissipating fins 4 at predetermined positions, and the heat dissipating fins 4 are fixed to the upper surface of the support plate 3 in a protruding manner. The radiating fin (4) has a cylindrical shape and its outer peripheral surface has a sawtooth shape. The shapes of the radiating fins 4 may be variously formed depending on the purpose of use. The thermo pad, not shown in the figure, conducts and emits heat on the heat sink 3 in the direction of the cover of the housing.

In order to induce the convection phenomenon of the air, the heat dissipating unit 1 is provided with one of the heat dissipating fins 4, one of the heat dissipating fins 4 is provided with an LED printed circuit board (not shown) (2) is formed to generate convection which induces hot air generated from the LED, thereby allowing the heat to be dissipated. An air vent 5 is inserted into the air passage 2 to prevent the inflow of dust or moisture and to discharge the internal heat to the outside to improve the heat radiation function.

However, in this prior art, a plurality of radiating fins 4 are provided for the heat dissipation of LEDs mounted on the supporting plate, and one air passage 2 provided with the vent portion 5 is not a heat dissipation of the LED, This air duct 2 is independent of the heat dissipation of the LED printed board and is not different from the heat dissipator of the support plate which is in contact with the LED printed board previously disclosed before this technology, .

In view of this fact, it may be desirable to heat and cool efficiently without contacting the LED printed circuit board.

The main purpose of the present invention is to provide an LED lighting lamp cooling apparatus which achieves an intensive cooling structure for inducing a smooth flow of outside cooling air inside a LED lighting lamp to enhance cooling efficiency.

Another object of the present invention is to provide an LED lighting device which induces external air to an air flow path to induce a heat conduction flow according to Berunui's principle, performs heat exchange by primary cooling, immediately discharges heat- The present invention also provides a cooling apparatus for an LED lighting lamp which can improve the heat dissipation efficiency.

According to the present invention, a cooling device for an LED lighting lamp is a first flat plate made of a metal such as an aluminum alloy excellent in heat dissipation and having a first protrusion formed with quadrangular corners, A first wall portion formed by a quadrangular rim to receive a plurality of LED modules on a top surface of a flat plate, a second wall portion formed by a quadrangular rim around the periphery of the flat plate a certain distance from the first wall portion, A receiving portion including closing members for closing the appearance of the lighting lamp between the wall portions;

 A second flat plate which is arranged at a predetermined distance from the first flat plate of the accommodating portion so as to face the first flat plate and which has a second protruding portion formed with a second engaging hole to be engaged with the accommodating portion at quadrangular edges; A plurality of induction holes drilled in a predetermined arrangement to guide the cooling holes, and cooling members formed of cooling members formed at the center of the through holes coinciding with the induction holes.

The first flat plate has first sloped surfaces formed on the lower surface of the lower surface of the lower surface in a downwardly sloping manner and thicker on both sides of the lower surface of the lower surface of the first flat plate. .

 The second flat plate has a second sloped surface formed on the lower surface of the lower surface in such a manner that the thickness of the second flat surface is gradually increased from both sides toward the center of the lower surface, do.

 The cooling member is composed of a plurality of fins arranged around the circumference and through holes penetrating through the guide hole of the second flat plate so that the diameter is reduced from the upper part to the lower part so that air can flow into the center.

In the present invention, the cooling device is constructed in an intensive cooling structure, inducing external air to induce a rapid heat conduction flow, heat-exchanging the heat to conduct primary cooling, immediately radiating heat-transferred air to perform secondary cooling, So that the cooling efficiency is increased.

The present invention will be described in detail with reference to the accompanying drawings.
1 is a perspective view of an LED lighting device having a cooling device according to the present invention,
FIG. 2 is an exploded perspective view showing a structure of a cooling apparatus according to the present invention,
3 is a cross-sectional side view of the cooling device according to the present invention,
4 is a cross-sectional view of a radiator coupled to a LED printed substrate of the prior art.

The present invention can be applied to a street light or an illumination light 10 such as a light projector as shown in Figs. 1 and 2. The illuminating lamp 10 includes a receiving portion 30 in which at least three or more LED modules 22 mounted on a printed circuit board (not shown) are fixed to a front surface and a receiving portion 30 And a cooling device 20 composed of cooling parts 40, which will be described later in detail. The illuminating lamp 10 includes a lower side frame 21 and a lower frame 26 enclosed by a plurality of side frames 21 and upper and lower frames 26 to accommodate the cooling device 20 including the accommodating portion 30 and the cooling portion 40, And a rectangular case 11 made of a flat plate (not shown).

Therefore, the illumination lamp 10 allows the cooling device 20 to be housed in a state in which the housing part 30 and the cooling part 40 are coupled with each other in a state where the LED module 21 is exposed to the outside in the case 11, Is completed by assembling a closure member (25) which is coupled to the frames (25) and (26) as appropriate around the pouch (30).

Two or more cut-out portions 27 are formed in the upper and lower frames 26 so as to function as two or more flow passages in order to induce air outside the case adjacent to the closing member 25 to induce convection.

As shown in Figs. 2 and 3, the housing portion 30 has a first flat plate 31 made of a metal such as an aluminum alloy excellent in heat dissipation. The first flat plate 31 is formed with first protrusions 33 in which the first engaging holes 32 are formed so as to engage with the cooling portion 40 at four corners thereof. The first protrusions 33 have a constant thickness and extend integrally from the first flat plate 31 or are joined to each other by welding or the like with a separate member. On the lower surface of the first flat plate 31, the first inclined surfaces 34 are formed so as to gradually increase in thickness from both sides toward the center of the first flat plate 31 and downwardly inclined from the side. On the upper surface of the first flat plate 31, a first wall portion 36 having the same quadrangular rim as the height for accommodating the plurality of LED modules 21, and a first wall portion 36 spaced a distance from the first wall portion 36 along the periphery of the flat plate 4 And a second wall portion 37 constituting each frame is provided. Between the first wall portion 36 and the second wall portion 37 is treated with a closure member 25 which will be described in detail later upon assembling the illuminator 20. [

The cooling section 40 has a second flat plate 41 made of a metal such as an aluminum alloy excellent in heat dissipation against the first flat plate 31 of the storage section 30. [ A second projection 43 having a second engaging hole 42 formed to engage with the accommodating portion 30 is formed on the second flat plate 41 and its four corners. The second projections 43 also have a constant thickness and extend integrally from the second flat plate 41 or are joined to each other by welding or the like with a separate member. On the lower surface of the second flat plate 41, the thickness is gradually increased from both sides toward the center thereof, and the second inclined surfaces 44 are formed upward from the side surface.

The cooling device 20 configured as described above has a space formed between the housing part 30 and the cooling part 40 when the housing part 30 and the cooling part 40 are coupled together and the space is formed between the first inclined surface 34 and the second inclined surface 44, And an air passage 50 that is narrowed toward the center from the outside. Here, the first air passage 50 has a shape narrowed from the outside to the inside, so that the principle of Berunui, in which the flow of the cooling air is rapidly induced, is applied.

 On the other hand, on the lower surface of the second flat plate 41, cooling members 45 formed in a cylindrical shape and having a plurality of heat dissipation fins formed around the cooling plates 45 are arranged in a predetermined arrangement. The cooling members 45 penetrate the cooling plate 45 The through holes 46 are formed so as to have a small diameter from the top to the bottom so that the principle of the Bernoulli also applies. The second flat plate 41 is arranged in the same manner as the arrangement of the cooling members 45, and the guide holes 47 are formed so as to coincide with the through holes 46.

The cooling device 20 is assembled in the case 11 together with the upper and lower frames 21 and 26 in the assembled state so that the cooling device 20 is installed in the upper and lower frames 26, And the outside cooling air flows into the cooling water passage 27. The cooling air thus introduced is guided to the center of the air flow path 50 to which the principle of the Bernoulli method is applied rapidly to perform heat exchange so as to be primarily cooled and then to pass through the through holes 46 through the guide hole 47 of the second flat plate 41 The LED module 22 is quickly cooled and cooled rapidly and efficiently on the first flat plate 31. The LED module 22 is cooled by the LED module 22,

Particularly, since the air circulation passage 50 introduces a large amount of cooling air into the interior of the air passage 50 to induce a convection phenomenon inside the air passage 50, the cooling efficiency of the first and second flat plates 41, The cooling function is performed with high cooling efficiency.

As described above, the cooling device 20 for an illumination lamp of the present invention has an effect of promptly flowing cooling air and efficiently cooling it.

10: illumination light 20: cooling device 30:
40: cooling section 50: air flow path 21, 26: upper and lower and left and right frames
22: LED module 23: LED 27:
31: first flat plate 32: first engaging hole 33: first protrusion
36, 37: first and second wall portions 34: first inclined surface
41: second flat plate 42: material 2 engaging hole 43: second projection
44: second inclined surface 46: through hole 47: guide hole

Claims (4)

A cooling apparatus for an LED lighting lamp,
A first flat plate which is made of a metal such as aluminum alloy having excellent heat dissipation and has a first protrusion formed with quadrangular corners and has a first fitting hole to be engaged with the cooling section; A second wall portion formed by a quadrangular rim along the periphery of the flat plate at a certain distance from the first wall portion and a second wall portion formed by a rim member closing the outer appearance of the illumination lamp between the first wall portion and the second wall portion, A housing part made of resin;
A second flat plate which is arranged at a predetermined distance from the first flat plate of the accommodating portion so as to face the first flat plate and which has a second protruding portion formed with a second engaging hole to be engaged with the accommodating portion at quadrangular edges; And a plurality of cooling holes formed in the center of the through holes to coincide with the plurality of induction holes and the induction holes.
The method according to claim 1,
The first flat plate has first sloped surfaces formed on the lower surface thereof with a thickness gradually increasing from both sides toward the center so as to be inclined downwardly from the side and assembled against the second flat plate to form an air flow path, And a cooling device for the LED lighting lamp.
The method according to claim 1,
The second flat plate has a second sloped surface formed on the lower surface of the lower surface in such a manner that the thickness of the second flat surface is gradually increased from both sides toward the center of the lower surface, And a cooling device for the LED lighting lamp.
The method according to claim 1,
Wherein the cooling member comprises a plurality of pins arranged around the circumference and through holes formed in the guide hole of the second flat plate so as to allow the air to flow into the center from the upper portion to the lower portion so as to have a smaller diameter, .

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