KR102539956B1 - Air cooling heat sink for UV LED curing machine - Google Patents

Abstract

The present invention relates to an air-cooled heat sink for a UV LED curing machine. To be described in more detail, the present invention relates to the air-cooled heat sink for a UV LED curing machine, comprising: a heat sink (10) to which a UV LED is attached; a plurality of heat pipes (20); a fixing member (30) that securely couples the heat pipe (20) to the heat sink (10); and a plurality of stacked fins (40) stacked and supported side by side on the heat pipe (20). Thus, the present invention can provide the air-cooled heat sink with excellent cooling efficiency to a point where the air-cooled heat sink has a cooling effect almost similar to that of a water-cooled type heat sink.

Description

Air cooling heat sink for UV LED curing machine}

The present invention relates to an air-cooled heat sink for a UV LED curing machine, and more specifically, a heat sink 10 to which UV LEDs are attached, a plurality of heat pipes 20, and the heat sink 10 It relates to an air-cooled heat sink for a UV LED curing machine, which includes a fixing member 30 that is fixedly coupled to the heat pipe 20, and a plurality of laminated fins 40 stacked and supported side by side on the heat pipe 20.

A UV (ultraviolet) curing machine is a device for curing an ultraviolet curable resin containing a photoinitiator, and is widely used in various industrial fields to perform adhesion, coating, and printing processes. The UV LED curing machine uses LED as an ultraviolet light source, and has the advantage of reducing the size of the equipment and reducing power consumption compared to the case of using a conventional UV lamp.

In the UV LED curing machine, the heat generated from the LED, which is a light source, has a negative effect of reducing the lifespan and light quantity of the UV LED. Therefore, conventionally, various UV LED curing devices equipped with a cooling device, that is, a heat sink, which efficiently cools the heat generated by the UV LED have been proposed.

For example, in Registered Patent No. 10-1623299 (May 16, 2016), in a UV LED curing device for large-area coating that cures a product coated with an ultraviolet curable resin with UV LED, a heat sink with an LED module installed therein Disclosed is a cooling means comprising a heat sink, a water cooling jacket surrounding the heat sink, and a radiator equipped with a cooling water circulation path.

And, in Patent Registration No. 10-1723130 (March 29, 2017), in an ultraviolet curing device used in the bonding process of a display panel, a metal block attached to the rear surface of a light emitting unit having a plurality of LEDs and the metal block Disclosed is a cooling module including a cooling pipe for circulating a refrigerant thereon.

In addition, in Patent Registration No. 10-2016288 (August 23, 2019), in a UV ink curing device for printing using UV LED, a first case and a second case through which a printed matter passes, and a printed matter in the first case Disclosed is a UV ink curing device comprising a UV LED substrate for irradiating UV light toward a UV LED substrate, a heat sink for dissipating heat generated from the UV LED substrate, and a heat dissipation cooling fan for circulating air through the heat sink. .

Finally, Patent Registration No. 10-2402027 (May 20, 2022) discloses an LED UV curing device that can prevent deformation of printed materials and deterioration of print quality by improving the heat dissipation structure mounted on a conventional UV printing device. has been Attached Figure 1 shows a curing module of the LED UV curing machine, including a first module (A) disposed above the printed material and a second module (B) disposed below the printed material.

The first module (A) irradiates UV light on the surface of the printed matter, and is composed of a housing (A1), a light irradiation unit (A2), a reflector (A3), a diffusion plate (A4), and a heat radiation unit (A5). . The heat dissipation part A5 includes a heat sink A51, a heat dissipation fan A52, and a heat pipe A53, and the heat sink A51 includes a heat dissipation plate A511 and a heat dissipation fin A512. .

The heat sink according to the present invention may correspond to the heat dissipation part A5 in the LED UV curing machine of FIG. 1. Descriptions of other unexplained reference numerals in FIG. 1 are omitted.

Registered Patent No. 10-1623299 (May 16, 2016) Registered Patent No. 10-1723130 (March 29, 2017) Registered Patent No. 10-2016288 (August 23, 2019) Registered Patent No. 10-2402027 (May 20, 2022)

In general, heat sinks used in UV LED curing machines can be divided into air-cooled and water-cooled types. The air-cooling type has advantages of simple structure and low manufacturing cost compared to the water-cooling type, but has a relatively low cooling effect.

Accordingly, an object of the present invention is to provide an air-cooled heat sink that is very suitable for use as a cooling device for a UV LED curing machine, and particularly has excellent cooling efficiency enough to show a cooling effect almost similar to that of a water-cooled type while being air-cooled.

Another object of the present invention is to provide an air-cooled heat sink that can easily adjust the cooling efficiency according to the purpose of use of a UV LED curing machine, and furthermore, the assembly process and maintenance and repair are quick and easy.

The heat sink for UV LED curing machine according to the present invention,

A heat sink 10 made of metal having a rectangular plate shape, on one side of which UV LEDs 11 are attached side by side, and on the other side, straight upward arc grooves 12 extending to a predetermined length L1 are arranged side by side;

A liquid is filled inside a cylindrical metal tube with both ends sealed, and a horizontal support part 21 closely inserted into the upward arc groove 12 of the heat sink 10, and a heat sink at both ends of the horizontal support part 21 ( 10) and a plurality of heat pipes 20 having vertical bent portions 22a and 22b bent in the vertical direction;

It covers the horizontal support part 21 of the heat pipe 20 and fixes it to the heat sink 10, respectively, and is made of a rod shape with a rectangular cross section, and one side is formed in the upward arc groove 12 along the longitudinal direction. a fixing member 30 having corresponding downward arc grooves 31 provided side by side and having a heat dissipation groove 32 provided on the other surface to expand the surface area;

As a thin plate made of a metal material, a plurality of pipe insertion holes 41 into which both longitudinally bent portions 22a and 22b of the heat pipe 20 are inserted in close contact with each other are perforated side by side, and the longitudinally bent portions 22a and 22b A plurality of laminated pins 40 arranged layer by layer at regular intervals on the other surface of the heat sink 10 while being inserted into and supported by the; It is characterized in that it is configured to include.

The upward arc grooves 12 of the heat dissipation plate 10 are alternately arranged one by one so that both ends of the upward arc grooves 12 adjacent to each other are staggered with each other, so that the vertical bends 22a on both sides of the heat pipe 20, 22b) are alternately arranged to correspond to both ends of the upward arc grooves 12, and the upward arc grooves 12 of the heat sink 10 and the downward arc grooves 31 of the fixing member 30 are combined to form a horizontal support portion. It is characterized in that it is configured to surround the outer circumferential surface of (21) together.

The heat pipe 20 and the laminated fin 40 coupled to the heat sink 10 are assembled and separated in the form of one laminated fin module M1 and M2, and the laminated fin module M1 and M2 is a heat pipe ( 20) It is characterized in that it is constructed by inserting and fixing 20 to 100 sheets of stacking pins 40 in addition to 8 to 16 pieces.

In the heat sink for a UV LED curing machine according to the present invention, the heat generated from the UV LED 11 is transferred to the laminated fin 40 through the heat sink 10 and the heat pipe 20 and then quickly diffused into the air. Therefore, it has a cooling effect almost similar to that of a water-cooled type even though it is an air-cooled type.

The heat sink for a UV LED curing machine according to the present invention can easily adjust the cooling efficiency by adjusting the number and specifications of the heat pipes 20 and the laminated fins 40, and further uses the laminated fin modules M1 and M2. This has the effect of facilitating assembly and disassembly as well as maintenance and repair.

1 is a view illustrating the structure of a conventional LED UV curing machine;
2 is a perspective view of a heat sink according to an embodiment of the present invention;
Figure 3 is a front view of Figure 2;
Figure 4 is a side view of Figure 2;
5 is a perspective view of the heat sink 10 in FIG. 2;
6 is a perspective view of the heat pipe 20 in FIG. 2;
7 is a perspective view of the fixing member 30 in FIG. 2;
8 is a plan view of the laminated pin 40 in FIG. 2;
9 is a side view of the laminated pin 40 in FIG. 2;
10 is a perspective view of the laminated pin module M1 in FIG. 2;
11 is a perspective view of a heat sink according to another embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. However, since the accompanying drawings illustrate preferred embodiments of the present invention, the scope of the present invention is not limited by these embodiments. In addition, even if the configuration is essential for carrying out the present invention, detailed descriptions of matters that are introduced in the prior art or can be easily implemented by a person skilled in the art from known technologies will be omitted.

As shown in the accompanying FIGS. 2 to 4, the heat sink for a UV LED curing machine according to the present invention includes a heat sink 10 to which an LED for a UV curing machine is attached, a plurality of heat pipes 20, and the heat pipe 20 ) is configured to include a fixing member 30 for fixing and coupling the heat sink 10, and a plurality of laminated fins 40 stacked and supported side by side on the heat pipe 20. A conventional cooling fan (not shown in the drawing) may be disposed on the side of the laminated fin 40 .

First, the heat sink 10 has a rectangular plate shape made of a metal material, and has a structure in which UV LEDs 11 are attached side by side on one side and a plurality of straight upward arc grooves 12 are arranged side by side on the other side. Attached FIG. 5 illustrates a heat sink 10 in the form of a rectangular plate made of a copper material having excellent thermal conductivity and having dimensions of 95 mm in width, 340 mm in length, and 7 mm in thickness.

The UV LED 11 may be, for example, an LED emitting ultraviolet light with an output of about 200 W per unit in a wavelength range of about 315 to 400 nm. This UV LED 11 is a COB type or a package type, and can be attached to one surface of the heat sink 10 using a conventional fixing screw, and for this purpose, the UV LED 11 of FIG. 4 is provided with a screw hole.

The upward arc groove 12 is, for example, a circular arc shape having a radius of 3 mm, preferably a semi-circular groove, and preferably has a length L1 of about 60 to 80 mm shorter than the width of the heat dissipation plate 10 . In the heat sink 10 of FIG. 5 , 48 upward arc grooves 12 having the same length L1 are arranged side by side along the longitudinal direction of the heat sink 10 .

'형상으로 절곡된 구조를 갖는다. 상기 히트파이프(20)를 구성하는 금속관은 구리 재질로 이루어지고, 그 내부에는 물이 채워져 있는 것이 바람직하다.Next, the heat pipe 20 is filled with liquid inside a cylindrical metal tube with both ends sealed, as shown in FIG.

It has a structure bent into a shape. It is preferable that the metal tube constituting the heat pipe 20 is made of copper and filled with water.

The horizontal support part 21 is tightly inserted into the upward arc groove 12 of the heat sink 10, and its radius and length L1 are the same as the radius and length L1 of the upward arc groove 12. It is preferable that about half of the circular cross section of the horizontal support part 21 is accommodated in the upward arc groove 12.

The vertical bent portions 22a and 22b are bent in a vertical direction with respect to the heat dissipation plate 10 at both ends of the horizontal support portion 21, and the ends thereof are sealed. The number of heat pipes 20 is the same as the number of upward arc grooves 12 provided on the heat sink 10 .

The fixing member 30 covers the horizontal support portion 21 of the heat pipe 20 and functions to fix and couple the heat pipes 20 to the heat sink 10 independently. The material of the fixing member 30 may be made of aluminum, and its length is the same as that of the heat sink 10 .

As shown in FIG. 7, the fixing member 30 is formed in a bar shape having a rectangular cross section, and on one side thereof, downward arc grooves 31 corresponding to the upward arc grooves 12 are provided side by side along the longitudinal direction. has been The radius and spacing of the downward arc grooves 31 are the same as those of the upward arc grooves 12 . So, the upward arc groove 12 and the downward arc groove 31 are combined to surround the upper half and the lower half of the horizontal support part 21 together.

In addition, the other surface of the fixing member 30 is provided with a heat dissipation groove 32 along the longitudinal direction. The heat dissipation groove 32 functions to increase the heat dissipation effect by expanding the surface area of the fixing member 30 . The fixing member 30 may be attached to the heat sink 10 by welding together with the horizontal support portion 21 of the heat pipe 20, or may be coupled to the heat sink 10 by a separate fixing screw. To this end, a plurality of screw holes are provided at appropriate positions in the heat sink 10 of FIG. 5 .

Lastly, the stacking pins 40 are in the form of a thin plate made of a metal material, and are arranged layer by layer at regular intervals on the other surface of the heat sink 10 while being supported by the longitudinally bent portions 22a and 22b. 8, as a thin aluminum plate having a thickness of 0.3 to 0.7 mm, a rectangular laminating pin 40 having a width of 115 mm and a length of 84 mm is illustrated.

A plurality of pipe insertion holes 41 into which both longitudinally bent portions 22a and 22b of the heat pipe 20 are inserted in close contact with each other are perforated side by side in the stacking fin 40 . The inner diameter of the pipe insertion hole 41 is the same as the diameter of the longitudinally bent portions 22a and 22b. Therefore, the stacking pins 40 are arranged layer by layer at regular intervals while being inserted into and supported by the longitudinally bent portions 22a and 22b.

It is preferable that the pipe insertion hole 41 of the stacking pin 40 is provided with a sleeve 42 having a predetermined height L3 as shown in FIG. 9 . The inner diameter of the sleeve 42 is the same as the diameter of the longitudinally bent portions 22a and 22b. Therefore, the sleeve 42 serves to increase the supporting force of the stacking pins 40 on the longitudinally bent portions 22a and 22b, and at the same time to keep the upper and lower intervals between the stacking pins 40 constant. The height (L3) of the sleeve 42 is preferably 1.5 ~ 3mm.

On the other hand, as shown in FIG. 5, it is preferable that the upward arc grooves 12 disposed on the heat sink 10 are alternately arranged one by one so that both ends of the upward arc grooves 12 adjacent to each other are crossed with each other. . In this case, as shown in FIGS. 6 and 8 , the vertically bent portions 22a and 22b of the heat pipe 20 adjacent to each other and the pipe insertion holes 41 of the stacking fins 40 corresponding thereto are also alternately arranged in a zigzag pattern.

Therefore, sufficient space is secured between the longitudinally bent portions 22a and 22b, and wind provided from a cooling fan (not shown in the drawing) installed on the side of the laminated fin 40 causes a vortex phenomenon to increase the heat dissipation effect. Further, the spacing between the pipe insertion holes 41 is widened, so that the structural strength of the stacking pins 40 increases.

For reference, when the vertical bends 22a and 22b of the heat pipe 20 are arranged side by side in a row, the adjacent vertical bends 22a and 22b come into close contact with each other to form a wall that blocks the flow of air, resulting in relatively heat dissipation. effect is diminished In addition, when the pipe insertion holes 41 of the stacking pins 40 are arranged side by side in a row, the gap between the pipe insertion holes 41 adjacent to each other becomes too narrow, so that the stacking pins 40 along the pipe insertion holes 41 ) may be bent or cut.

5, 6 and 8 illustrate the case in which the lengths L1 of the upward arc grooves 12 are all the same, but by alternately arranging two types of upward arc grooves 12 having different lengths L1 The same effect can be obtained even if both ends of the upward arc grooves 12 adjacent to each other are configured to cross each other. However, in this case, it may be somewhat burdensome in that two types of heat pipes 20 having different lengths of the horizontal support portion 21 must be used.

In addition, according to a preferred embodiment of the present invention, the heat pipe 20 and the laminated fin 40 coupled to the heat sink 10 may be assembled and separated in the form of one laminated fin module M1 or M2. At this time, the stacked fin modules M1 and M2 may be configured by inserting and fixing 20 to 100 stacked fins 40 into 8 to 16 heat pipes 20 .

Attached FIG. 10 shows a stacked fin module M1 composed of 12 heat pipes 20 and 51 stacked fins 40, and FIG. 2 illustrates a heat sink in which four stacked fin modules M1 are combined. . 11 illustrates a stacked fin module M2 composed of 12 heat pipes 20 and 73 stacked fins 40, and a heat sink in which four stacked fin modules M2 are combined.

Depending on the purpose of the laminated fin module (M1, M2), the heat pipe 20 and the laminated fin 40 may be appropriately changed in size, and also coupled to the heat sink 10 according to the purpose of the heat sink. The number of stacked pin modules M1 and M2 may be determined. When the stacked fin modules M1 and M2 are used, the heat sink according to the present invention can be more easily assembled and disassembled, and furthermore, maintenance and repair of the heat sink is convenient.

(10) Heatsink (11) UV LED
(12) Upward arc groove (20) Heat pipe
(21) horizontal support (22a, 22b) vertical bending
(30) Fixing member (31) Downward arc groove
(32) heat dissipation groove (40) stack fin
(41) Pipe insertion hole (42) Sleeve
(L1) the length of the upward arc groove 12 (L2) the length of the vertically bent portions 22a and 22b
(L3) Height of sleeve (42) (M1, M2) Laminated pin module

Claims (6)

A heat sink 10 made of metal having a rectangular plate shape, on one side of which UV LEDs 11 are attached side by side, and on the other side, straight upward arc grooves 12 extending to a predetermined length L1 are arranged side by side;
A liquid is filled inside a cylindrical metal tube with both ends sealed, and a horizontal support part 21 closely inserted into the upward arc groove 12 of the heat sink 10, and a heat sink at both ends of the horizontal support part 21 ( 10) and a plurality of heat pipes 20 having vertical bent portions 22a and 22b bent in the vertical direction;
It covers the horizontal support part 21 of the heat pipe 20 and fixes it to the heat sink 10, respectively, and is made of a rod shape with a rectangular cross section, and one side corresponds to the upward arc groove 12 along the longitudinal direction. a fixing member 30 having downward arc grooves 31 which are provided side by side and having a heat dissipation groove 32 provided on the other surface to expand the surface area;
A thin plate made of metal that is arranged layer by layer at regular intervals on the other surface of the heat sink 10 in a state of being inserted into and supported by both longitudinally bent portions 22a and 22b of the heat pipe 20, the longitudinally bent portions 22a and 22b. A plurality of stacked pins 40 in which a plurality of pipe insertion holes 41 into which ) are inserted in close contact are perforated, and a sleeve 42 protrudes at a predetermined height L3 around the pipe insertion hole 41 ; It is composed of,
The upward arc grooves 12 of the heat dissipation plate 10 are alternately arranged one by one so that both ends of the upward arc grooves 12 adjacent to each other are staggered with each other, so that the vertical bends 22a on both sides of the heat pipe 20, 22b) are alternately arranged to correspond to both ends of the upward arc grooves 12, and the upward arc grooves 12 of the heat sink 10 and the downward arc grooves 31 of the fixing member 30 are combined to form a horizontal support portion. Heat sink for UV LED curing machine, characterized in that configured to surround the outer circumferential surface of (21) together
delete delete delete delete The method of claim 1, wherein the heat pipe 20 and the stacked fins 40 are assembled in the form of one stacked fin module M1 and M2 on the heat sink 10, and the stacked fin modules M1 and M2 are Heat sink for UV LED curing machine, characterized in that it is constructed by inserting and fixing 20 to 100 sheets of laminated pins (40) in 8 to 16 heat pipes (20)

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