KR20160095596A - LED Lighting Apparatus - Google Patents

Abstract

The present invention relates to an LED lighting apparatus and, more specifically, to an LED lighting apparatus installed in a tunnel. The LED lighting apparatus according to the present invention comprises: an LED lighting unit (300) which includes an LED substrate (320) on which a plurality of LED elements (310) are installed, and a heat dissipation unit (330) coupled to the LED substrate (320); a lower housing which is fixed to a structure (2); an upper housing (200) which is provided with an opening portion (210) such that the LED elements (310) are directed to the outside, is hinge-coupled to the lower housing to form an enclosed inner space with the lower housing (100) to install the LED lighting unit (300); one or more straight cooling pipes (400) which are installed to penetrate at least one of the lower housing (100) and the upper housing (200), allow the external air to flow from one end to the other end, and cool the inner space heated by the heat dissipation unit (330) of the LED lighting unit (300); and a cover member (340) which covers the opening portion (210) from the inside or the outside to protect a lighting area of the LED lighting unit (300) and to emit light of the LED elements (310), wherein the cover member (340) is disposed in parallel to the LED substrate (320), and a normal distance (H) from the top end of the LED elements installed on the LED substrate (320) is 1.0 mm to 9.0 mm.

Description

{LED Lighting Apparatus}

The present invention relates to an LED lighting device, and more particularly, to an LED lighting device installed in a structure such as a tunnel.

A light fixture is a mechanism that fixes or protects a light source by reflecting, refracting, or transmitting light from the light source.

The light sources of the lighting apparatus include incandescent lamps and fluorescent lamps used indoors, and halogen lamps used in outdoor such as parks, street lamps, and road lighting apparatuses.

On the other hand, LED (Lighting Emitting Diode) is a semiconductor that emits light. It has low power consumption (1/6 of incandescent lamp), long life (8 times of incandescent lamp) and environment- Light source, interior light, street light, illumination light, automobile, and so on.

The LED illumination device is also used as a lighting device for illuminating the inside of a structure or the vicinity of a structure by lighting the interior of the tunnel.

Such a lighting device has a high optical efficiency as the distance between the cover member and the LED element closer to the transparent material, which protects the inside of the lighting device and is installed to facilitate irradiation of light emitted from the LED device.

It is an object of the present invention to provide an LED lighting device which recognizes the above trend and is installed in a structure such as a tunnel and illuminates the LED using a LED.

The present invention has been made in order to achieve the above-mentioned object of the present invention. The present invention provides a liquid crystal display device including an LED substrate 320 provided with a plurality of LED elements 310, An LED illumination unit 300 including a plurality of LEDs 330; A lower housing (100) fixed to the structure (2); An opening 210 is formed in such a manner that the plurality of LED elements 310 are directed to the outside and the LED lighting unit 300 is hinged to the lower housing 100 to be installed together with the lower housing 100 An upper housing (200) forming an enclosed inner space; The inner space is formed to penetrate through at least one of the lower housing 100 and the upper housing 200 and to allow external air to flow from one end to the other end, One or more straight tube cooling tubes (400) for cooling the tubes A cover member 340 covering the opening 210 of the upper housing 200 from the inside or outside to protect the illumination area of the LED illumination unit 300 and emitting the light of the LED device 310 to the outside ; The cover member 340 is disposed in parallel with the LED substrate 320 and has a normal distance H from the uppermost end of the LED element 310 provided on the LED substrate 320 of 1.0 mm or more and 9.0 mm or less And an LED illumination device.

The normal distance H is preferably 5.0 mm to 6.0 mm.

A cover member 340 covering the opening 210 is formed on the LED illumination unit 300 so as to protect the plurality of LED elements 310 while allowing the light generated from the plurality of LED elements 310 to pass therethrough. And the upper housing 200 and the lower housing 100 are rectangular in plan view and the cooling tube 400 is parallel to one side of the rectangle And at least one of the upper housing 200 and the lower housing 100 corresponds to the cooling pipe 400 and is provided with a pair of opposed cooling pipes 400, The cooling pipe 400 is formed with a hub portion 410 having an enlarged outer diameter at both ends of the cooling pipe 400. The hub portion 410 is connected to the cooling pipe 400, After being inserted into the pair of installation holes (190), pressure is applied at both ends And an O-ring 540 for sealing the inner space is installed between the hub 410 and the outer surface of any one of the upper housing 200 and the lower housing 100, 400 may have a plurality of protrusions or ribs formed thereon to enhance the heat exchange effect.

The upper housing 200 and the lower housing 100 are provided with a hinge coupling part 510 at one side of the cooling tube 400 and at the other side of the upper housing 200 and the lower housing 100 (Not shown) may be provided.

According to one aspect of the present invention, there is an advantage that the optimal arrangement of the internal structure and the optical efficiency can be maximized by presenting an optimum distance between the LED substrate on which the LED element is mounted and the cover member provided on the LED substrate.

In particular, by providing an optimum distance between the LED substrate and the cover member provided on the LED substrate, it is possible to provide a structure of an LED lighting device having a high optical efficiency and preventing a connector provided on the LED substrate from interfering with the cover member .

Further, in the LED lighting apparatus according to the present invention, when an LED lighting apparatus is installed in a structure such as a tunnel, which is an environment where a lot of foreign matter such as dust is scattered, an inner space is formed by the upper housing and the lower housing, By installing the lighting module, there is an advantage that the lifetime of the LED lighting module can be improved by preventing foreign substances from entering the vicinity of the structure such as a tunnel.

The LED lighting apparatus according to the present invention includes at least one cooling pipe passing through an inner space defined by an upper housing and a lower housing, and an LED lighting module installed in an enclosed inner space by an air flow through a cooling tube There is an advantage that the generated heat is discharged to the outside and the service life of the LED illumination module is improved.

Further, in the LED lighting apparatus according to the present invention, heat transfer from the heat dissipating unit to the cooling duct is efficiently performed by the heat transfer member provided in contact with the heat dissipating unit and the cooling pipe, thereby maximizing the heat radiation effect of the heat dissipating unit.

Specifically, the heat generated in the LED device is transmitted to the heat dissipation unit, and the heat transmitted to the heat dissipation unit is transmitted to the cooling pipe by the heat transfer member, thereby maximizing the heat dissipation effect.

In addition, the LED lighting apparatus according to the present invention can optimize the distance between the cover member and the LED element to increase the light efficiency of the LED element and prevent interference with the subsidiary materials that can be installed on the substrate on which the LED element is mounted .

1 is a longitudinal sectional view showing an example in which an LED illumination device according to the present invention is installed.
2 is a cross-sectional view showing an example in which an LED illumination device according to the present invention is installed.
3 is a plan view showing an LED lighting device according to a first embodiment of the present invention installed in the tunnel of FIG.
4 is a side view of the LED illumination device of Fig.
5 is a side cross-sectional view in the V-V direction in the LED illumination device of Fig.
6 is a cross-sectional view in the VI-VI direction in FIG.
Fig. 7A is an enlarged cross-sectional view of the portion A in Fig. 5 enlarged.
Fig. 7B is an enlarged cross-sectional view of the portion B in Fig. 5 enlarged.
Fig. 7C is an enlarged cross-sectional view of the portion C in Fig. 6 enlarged.
8 is an exploded perspective view showing an LED illumination device according to a second embodiment of the present invention installed in the tunnel of FIG.
Fig. 9 is a side cross-sectional view in the IX-IX direction in the LED illumination device of Fig. 10; Fig.
10 is a side cross-sectional view showing a modification of the heat transfer member of FIG.

Hereinafter, an LED illumination device according to the present invention will be described with reference to the accompanying drawings.

1 to 7C, the LED illumination device according to the first embodiment of the present invention includes an LED substrate 320 on which a plurality of LED elements 310 are mounted, An LED illumination unit 300 including a heat dissipation unit 330; A lower housing (100) fixed to the structure (2); An upper housing (200) having an opening (210) formed on an upper side of the LED lighting part (300) of the LED lighting part (300) and hinged to the lower housing )and; And at least one cooling pipe 400 installed to penetrate at least any one of the lower housing 100 and the upper housing 200 while passing through the inner space and allowing outside air to flow from one end to the other end.

The LED illumination unit 300 includes an LED substrate 320 mounted in an inner space and having a plurality of LED elements 310 and a heat dissipation unit 330 coupled to the LED substrate 320, Any structure can be used as long as it can be illuminated by the element 310.

Specifically, the LED illumination unit 300 may be coupled to any one of the upper housing 200 and the lower housing 100 as one module including an LED element 310 and an LED substrate 320.

The LED element 310 is a semiconductor element that emits light by external power supply, and may emit monochromatic light such as blue, red, or green, or may be an LED element of red, green, and blue tricolor.

The type, the number of the LED elements 310, and the arrangement pattern of the LED elements 310 can be variously determined in consideration of the use, function, and the like of the LED illumination device.

The LED substrate 320 may be a circuit board on which the LED element 310 is mounted and may be a PCB, an FPCB, or a metal PCB. The LED substrate 320 may have various shapes and structures such as a polygon, a circle, have.

The heat dissipating unit 330 may have any structure as long as it has a material such as aluminum or aluminum alloy and is capable of emitting heat generated by the LED device 210 as a structure in which the LED substrate 320 is coupled.

For example, the heat dissipation unit 330 may include a plurality of heat dissipation fins 331 to fix the LED substrate 320 by screws or the like and increase the heat dissipation effect in the remaining portions.

The heat dissipation unit 330 may include a coupling plate to which the LED substrate 320 is coupled and a heat dissipation block coupled to the coupling plate to maximize heat dissipation.

Here, the heat dissipation block may have various configurations such as a heat sink, a heat dissipation fin, and the heat transfer member described above.

The lower housing 100 is fixed to the structure 2 such as the tunnel 2 and can be configured as long as it can ultimately fix the LED illumination unit 300 to the structure.

For example, the lower housing 100 is configured to form an inner space such that the module lighting unit 300 can be installed together with an upper housing 200, which will be described later, and has a rectangular bowl shape as viewed from above .

In addition, the upper housing 200 may have a plurality of protrusions having a shape of a rib or the like on its outer circumferential surface for structural reinforcement and heat dissipation to the outside.

The lower housing 100 may have a mounting member 110 coupled to the bottom of the structure 2, for example, to be fixed to the inner wall of the tunnel 2 by bolts, welding, or the like.

The mounting member 110 may be fixed to the inner wall of the tunnel by a bolt or the like for fixing the lower housing 100 to the inner wall of the tunnel 2 by being coupled with the lower housing 100 by bolting or welding.

Particularly, the mounting member 110 is bent toward the inner wall of the tunnel 2 at both ends of a portion coupled to the bottom surface of the lower housing 100 so that the lower housing 100 is spaced from the inner wall of the tunnel 2 .

Meanwhile, the lower housing 100 may be provided with a power supply unit 610 for supplying power to the LED illumination unit 300.

The power supply unit 610 is connected to an external power source such as an SMPS to supply power to the LED illumination unit 300 or a rechargeable battery and supplies power to the LED illumination unit 300 without supplying external power for a predetermined period of time And so on.

The power supply unit 610 may be coupled to the bottom of the lower housing 100, but may also be coupled to the upper housing 200.

The upper housing 200 includes an opening 210 formed on the upper side of the LED lighting unit 300 so that the plurality of LED elements 310 are directed to the outside and hinged to the lower housing 100, Various configurations are possible.

The opening 210 is formed on the upper side of the upper housing 200 so that the plurality of LED elements 310 of the LED lighting unit 300 coupled to any one of the upper and lower housings 200, A variety of structures are possible according to the LED illumination structure of the LED illumination unit 300.

For example, the upper housing 200 and the LED illumination unit 300 have shapes similar to each other, and the opening 210 corresponds to the illumination region of the LED illumination unit 300, that is, the shape of the LED substrate 320 . ≪ / RTI >

Meanwhile, the upper housing 200 may have at least one of a protruding portion and a recessed portion of a closed curve, which is configured to mount and close the LED illumination portion 300 at a portion where the opening 210 is formed, An o-ring member of a closed curve may be installed.

The upper housing 200 covers the illumination area of the LED illumination unit 300, that is, the LED substrate 320, while covering the opening 210 on the inner side or the outer side, A transparent cover member 340 which can be discharged can be provided.

The transparent cover member 340 may be formed of glass, quartz, plastic or the like as a structure for emitting the light of the LED element 310 to the outside while protecting the illumination area of the LED illumination unit 300, It can have a material.

In addition, the transparent cover member 340 may be attached as a diffusion film or may include a diffusion material to enhance the optical characteristics of the LED element 310.

The transparent cover member 340 may be coupled to the LED illumination unit 300 instead of being coupled to the upper housing 200.

A transparent cover member 340 for protecting the plurality of LED elements 310 while passing the light generated from the plurality of LED elements 310 is inserted into the LED lighting unit 300 and the upper housing 200, Or the like.

It is preferable that the transparent cover member 340 is installed parallel to the LED substrate 320 on which the plurality of LED elements 310 are mounted.

One of the main features of the present invention is that the light efficiency varies depending on the normal distance H from the uppermost end of the LED device 310 mounted on the LED substrate 320. As a result, As shown in Fig. 6, the transparent cover member 340 preferably has a normal distance H of 1.0 mm or more and 9.0 mm or less.

When the normal distance H is larger than 9.0 mm, light is leaked to the upper housing 200 or the like, or light loss occurs in the space between the LED substrate 320 and the transparent cover member 340, Can not be obtained.

The height of the terminal (connector or the like) provided on the LED substrate 320 and the height of other elements to be installed (resistance or the like) are limited, and the height of the heated transparent cover member 340 There is a problem that the heat affects the LED element 310 and the light efficiency is lowered.

Considering that the interference with other members such as a connector and the heat of the heated transparent cover member 340 affect the LED element 310, the normal distance H is 145.54 lm / w, which is relatively high It is most preferable that the light efficiency is 5.0 to 6.0 mm.

According to the experiment, in the LED illumination device having the configuration shown in Figs. 1 to 7C, the light efficiency is 139.97 lm / W when the normal distance H is 13.1 mm, 145.54 lm / And 146.73 lm / W, respectively.

If the normal distance (H) is larger than 9.0 mm, the light efficiency decreases sharply. If the normal distance (H) is 1.7 mm, the light efficiency is 146.73 lm / W, which is larger than 5.5 mm. However, And the like, it is most preferable to use 5.0 mm to 6.0 mm, particularly 5.5 mm.

The upper housing 200 has a structure in which an inner space is formed so that the module lighting structure 300 can be installed together with the upper housing 200 like the lower housing 100 described above. It may have a rectangular bowl shape.

The upper housing 200 may have a plurality of protrusions having a shape of a rib or the like on the outer circumferential surface thereof in order to reinforce the structure and to release heat to the outside.

Meanwhile, the upper housing 200 and the lower housing 100 are coupled to each other to form an enclosed inner space. The inner space needs to be opened and closed for maintenance of the LED lighting unit 300 installed therein.

The upper housing 200 and the lower housing 100 are provided with a hinge coupling part 510 on one side of the cooling pipe 400 and on the other side of the upper housing 200 and the lower housing 100, A detachable portion 520 for engaging and disengaging the engaging portion 100 may be installed.

7B, the hinge coupling part 510 includes a hinge shaft 511, an upper housing 200, and a lower housing 100. The hinge coupling part 510 is configured to hinge the upper housing 200 and the lower housing 100, And a hinge portion 512 formed in the lower housing 100 and into which the hinge shafts 510 are inserted, respectively.

The hinge coupling part 510 may have various configurations according to the hinge coupling structure.

7A, the detachable unit 520 has a structure in which the upper housing 200 and the lower housing 100 are engaged with and disengaged from each other at a position opposed to the hinge coupling part 510, It is possible.

For example, the detachable unit 520 includes a latching protrusion 241 formed on one of the upper housing 200 and the lower housing 100, and a latching protrusion 524 formed on the upper housing 200, And an engaging member 522 which is engaged with the lower housing 100 to release the engagement between the upper housing 200 and the lower housing 100.

Meanwhile, the inner space formed by the upper housing 200 and the lower housing 100 needs to be isolated from the outside.

7A and 7B, the upper housing 200 and the lower housing 100 include at least one recess 221, 121, a protrusion 224, Etc. may be formed.

An O-ring 530 may be installed in the recesses 221 and 121. A protrusion 224 may be formed for fixing the O-ring 530.

In order to absorb the elastic deformation of the O-ring 530, a groove may be formed in the groove 121 again.

The recesses 221 and 121 and the protrusions 224 are preferably formed along the edges of the upper housing 200 and the lower housing 100. The recesses 221 and 121, . ≪ / RTI >

The cooling pipe 400 is installed so as to pass through at least one of the lower housing 100 and the upper housing 200 while passing through the inner space and has a structure in which outside air can flow from one end to the other end, It is possible.

Specifically, the cooling pipe 400 is installed to penetrate through the inner space formed for the engagement of the lower housing 100 and the upper housing 200, and the heat generated in the inner space by the air flowing from one end to the other end To the outside.

Here, the inner space is in a state in which the heat emitted from the LED illumination unit 300, particularly the heat dissipation unit 320 installed therein, is contained, and the heat in the inner space is radiated to the outside through the cooling pipe 400 .

Particularly, the cooling pipe 400 is coupled to the lower housing 100 and the upper housing 200 so as to be disposed in the longitudinal direction of the tunnel 2, 400, and discharges the heat in the internal space to the outside by the induced air flow.

Specifically, the upper housing 200 and the lower housing 100 may have a rectangular planar shape, and the cooling pipe 400 may be disposed parallel to one side of the rectangle. Particularly, it is more preferable that the cooling pipe 400 is disposed in the longitudinal direction of the tunnel 2.

At least one of the upper housing 200 and the lower housing 100 corresponds to each of the cooling tubes 400 so that the cooling tubes 400 penetrate the cooling tubes 400 A pair of mounting holes 190 are formed so as to be opposed to each other.

Meanwhile, a power supply unit is installed in the inner space formed by the coupling of the upper housing 200 and the lower housing 100, and the inner space needs to be isolated from the outside.

Therefore, it is necessary that the cooling pipe 400 is installed in a state in which the inner space is maintained in a sealed state.

As shown in FIG. 7C, a hub 410 having an enlarged outer diameter may be formed at both ends of the cooling pipe 400.

An O-ring 540 for sealing may be formed between the hub 410 and the outer surface of either the upper housing 200 or the lower housing 100.

When the hub unit 410 is formed at both ends, it is impossible to insert the hub unit 410 into the installation hole 190. The hub unit 410 includes a pair of installation holes 190, And then applying pressure at both ends.

Further, the hub unit 410 is a separate member separated from the cooling pipe 400 of the straight pipe type. The hub unit 410 has threads formed on the outer circumferential surface thereof and a thread is formed on the inner circumferential surface of the mounting hole 190, Both ends of the cooling pipe 400 can be pressed to fix the cooling pipe 400 of the straight pipe type.

At this time, a sealing member such as an O-ring is installed between the hub unit 410 and the straight pipe type cooling pipe 400 to prevent the outside air from flowing into the internal space.

As another method for fixing the hub part 410, the hub part 410 is separated from the straight pipe type cooling pipe 400 by a separate screw, The cooling pipe 400 can be fixed by pressing both ends of the cooling pipe 400.

Meanwhile, a plurality of protrusions or ribs may be formed on the inner circumferential surface and the outer circumferential surface of the cooling pipe 400 in order to maximize the heat exchange effect.

Also, the cooling pipe 400 may have various structures such as a structure having a relatively large outer diameter of the inflow portion and the discharge portion, that is, a nozzle structure, instead of the straight pipe structure.

Further, although the cooling pipe 400 has been described as an integral structure, various coupling structures are possible, such as a connecting portion being press-fitted or screwed in a state of being separated by two or more members.

At this time, if the cooling pipe 400 is divided into two or more members, the cooling pipe 400 may be sealed by a bar sealing member or the like, which may leak outside and inside of the separated portion.

On the other hand, in the LED lighting device, it is most important to dissipate the heat generated from the LED device, and the heat is efficiently dissipated from the heat dissipation unit 330 coupled with the LED substrate 320, desirable.

Accordingly, the LED illumination device according to the present invention may further include a heat transfer member for transferring heat from the heat dissipating unit 330 to the cooling pipe 400.

Hereinafter, an LED illumination device according to a second embodiment of the present invention will be described with reference to the accompanying drawings.

8 to 10, in addition to the configuration of the LED lighting apparatus according to the first embodiment, the LED lighting apparatus according to the second embodiment of the present invention further includes a cooling tube 400 and a heat dissipating unit 330, And one or more heat transfer members (350) installed to be in surface contact to transfer heat from the heat dissipating unit (330) to the cooling pipe (400).

The heat transfer member 350 is configured to be in surface contact with the cooling pipe 400 and the heat dissipating unit 330 to transmit heat from the heat dissipating unit 330 to the cooling pipe 400, Do.

For example, the heat transfer member 350 may have an insertion portion, one end of which is in surface contact with the heat radiating portion 330, and the other end of which is inserted at least a part of the cooling pipe 400.

Here, the heat transfer member 350 is important in terms of heat transfer between the heat dissipating unit 330 and the cooling pipe 400. The heat dissipating unit 330, the cooling pipe 400, And can be fixedly coupled.

For example, the heat transfer member 350 may be fixedly coupled to the heat dissipation unit 330, as shown in FIGS.

The through hole of the heat dissipating unit 330 may include at least one through hole formed in a surface of the heat dissipating unit 330 that is in contact with the heat conducting member 350, (Not shown) through the through-hole of the base plate 350.

The heat transfer member 350 is preferably made of a metal material having a high thermal conductivity such as aluminum, aluminum alloy, or stainless steel, which is intended for heat transfer.

The LED illumination unit 300 may be fixed to the heat transfer member 350 and may be supported by the heat transfer member 350 so that the LED illumination unit 300 is fixed to the upper housing 200. [ And the LED illumination unit 300 may be installed in various ways.

The heat transfer member 350 may have various shapes such as a shape corresponding to the bottom surface of the heat dissipating unit 330 to maximize a contact area at a surface contact portion with the heat dissipating unit 330.

The heat transfer member 350 is preferably formed to have a shape corresponding to the outer circumferential surface of the cooling pipe 400 in order to maximize a contact area at a portion in surface contact with the cooling pipe 400.

8 and 9, the plate-shaped member may have a first surface formed on one end and in surface contact with the bottom surface of the heat-radiating portion 330, A second surface contact portion formed at the other end and formed to have a curvature corresponding to the outer diameter so as to be in surface contact with the outer circumferential surface of the cooling pipe 400, and a connection portion connecting the first surface contact portion and the second surface contact portion .

The first surface contact part may be formed at one end of the plate-shaped member and formed at one end and may be variously formed as a surface-contacting part of the bottom surface of the heat-

The second surface contact portion may be formed as a portion formed at the other end and formed to have a curvature corresponding to the outer diameter so as to be in surface contact with the outer circumferential surface of the cooling tube 400.

On the other hand, the plate members may be installed in pairs so as to face each other with respect to the longitudinal direction of the cooling pipe 400.

At this time, the pair of plate members may be integrally formed or may be formed of separate members as shown in Figs. 8 and 9.

Meanwhile, the heat transfer member 350 may be formed of one heat transfer block 360 as shown in FIG.

As a specific example of the heat transfer block 360, the bottom surface of the heat dissipating unit 330 is coupled to the top surface, and the insertion unit is inserted into the bottom of the heat transfer block 360 to insert the cooling pipe 400.

Here, the inserting portion is formed to have a curvature corresponding to the outer diameter so as to be in surface contact with the outer circumferential surface of the cooling tube 400.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It is to be understood that both the technical idea and the technical spirit of the invention are included in the scope of the present invention.

100: lower housing 200: upper housing
300: LED illumination part 310: LED element
320: LED substrate 330:
340: heat exchange member 400: cooling pipe

Claims (4)

An LED illumination unit 300 including an LED substrate 320 having a plurality of LED elements 310 and a heat dissipation unit 330 coupled to the LED substrate 320;
A lower housing (100) fixed to the structure (2);
An opening 210 is formed in such a manner that the plurality of LED elements 310 are directed to the outside and the LED lighting unit 300 is hinged to the lower housing 100 to be installed together with the lower housing 100 An upper housing (200) forming an enclosed inner space;
The inner space is formed to penetrate through at least one of the lower housing 100 and the upper housing 200 and to allow external air to flow from one end to the other end, One or more straight tube cooling tubes (400) for cooling the tubes
A cover member 340 covering the opening 210 of the upper housing 200 from the inside or outside to protect the illumination area of the LED illumination unit 300 and emitting the light of the LED device 310 to the outside ;
The cover member 340 is disposed in parallel with the LED substrate 320 and has a normal distance H from the uppermost end of the LED element 310 provided on the LED substrate 320 of 1.0 mm or more and 9.0 mm or less And a light source for emitting the light. The method according to claim 1,
Wherein the normal distance (H) is 5.0 mm to 6.0 mm. The method according to claim 1 or 2,
A cover member 340 covering the opening 210 is formed on the LED illumination unit 300 so as to protect the plurality of LED elements 310 while allowing the light generated from the plurality of LED elements 310 to pass therethrough. And the upper housing (200)
The upper housing 200 and the lower housing 100 are rectangular in plan view,
The cooling pipe 400 is disposed parallel to one side of the rectangle,
At least one of the upper housing 200 and the lower housing 100 corresponds to the cooling pipe 400 and includes a pair of mounting holes (190)
The cooling pipe 400 has a hub 410 at both ends thereof with an enlarged outer diameter,
The hub unit 410 is formed by inserting the cooling pipe 400 into the pair of installation holes 190 and applying pressure at both ends thereof,
An O-ring 540 for sealing the inner space is installed between the hub 410 and the outer surface of either the upper housing 200 or the lower housing 100,
Wherein an inner circumferential surface and an outer circumferential surface of the cooling tube (400) are formed with a plurality of protrusions or ribs for enhancing a heat exchange effect. The method according to claim 1,
The upper housing 200 and the lower housing 100 are provided with a hinge coupling part 510 at one side of the cooling tube 400 and at the other side of the upper housing 200 and the lower housing 100 And an attaching / detaching unit (520) for engaging / disengaging the LEDs.

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