JP2014532266A - Heat dissipation device for LED lighting fixtures - Google Patents

Abstract

The present invention relates to a heat dissipating device for an LED lighting apparatus that is simple in structure but excellent in heat dissipating efficiency. To this end, the present invention includes a support unit coupled to an LED lighting fixture, and a heat dissipation unit coupled to the support unit, and the heat dissipation unit is a medium for transmitting heat generated by the LED lighting fixture. And a heat radiating pipe containing a working fluid containing powder having infrared emission characteristics, and a heat radiating member installed on the outer peripheral surface of the heat radiating pipe, the heat radiating pipe comprising a pipe main body portion, the pipe And a bending part whose at least one side end is bent upward from the main body, and the heat dissipation member provides a heat dissipation device for an LED lighting apparatus installed on the bending part. [Selection] Figure 1

Description

The present invention relates to a heat dissipation device for LED lighting fixtures, and more particularly to a heat dissipation device for LED lighting fixtures that can efficiently dissipate heat generated by the LED lighting fixtures.

In recent years, lighting using light emitting diodes, that is, LEDs (Light Emitting Diodes) has attracted a great deal of attention as an environmentally low load technology. The global white LED lighting market has grown nearly 50% annually since 2006, and with the development of LED technology, it is expected that LEDs will replace fluorescent lamps and other light fixtures in the future. Gradually realized.

In general, LED lighting fixtures in recent years tend to reduce the number of LEDs mounted using a high-power LED package of 1W class or higher, rather than arranging a large number of low-power LEDs.

When high-power LEDs are used for lighting fixtures, heat dissipation becomes a problem. When a high-power LED is used in a lighting fixture, a large amount of heat is generated in the LED itself due to the high output. If the heat generated in the LED is not properly dissipated, that is, if the LED is not properly cooled, not only the forward voltage is lowered and the luminous efficiency is deteriorated, but also the life of the LED is shortened. . In particular, in the case of outdoor lighting such as street lamps and fish lamps, such a tendency is conspicuous because lighting that is gradually brighter is preferred.

In order to solve such a heat dissipation problem, many LED lighting apparatuses using a metal base substrate have been proposed. However, the metal base substrate is also in a situation where it is difficult to ensure sufficient heat dissipation. A ceramic substrate obtained by printing a silver paste on an AlN (Aluminum Nitride) plate having a high thermal conductivity is widely known as a high-power LED substrate. However, this has a disadvantage of high manufacturing cost.

Korean Registered Patent Publication No. 10-1031650 invented by the present applicant discloses a cooling device for LED lighting equipment and an LED cooling equipment using the same.

In recent years, there have been attempts to improve heat dissipation by improving the substrate structure of the LED package. As another approach, an attempt has been found to improve heat dissipation by improving the mechanical structure of the LED chip. However, these methods all have the disadvantage of being expensive.

The problem to be solved by the present invention is to provide a heat dissipating device for an LED lighting apparatus that is simple in structure but excellent in heat dissipating efficiency.

In order to achieve the above-described problems, the present invention includes a support unit coupled to an LED lighting fixture, and a heat dissipation unit coupled to the support unit, wherein the heat dissipation unit is generated in the LED lighting fixture. A medium for transmitting heat, and a heat radiating pipe containing a working fluid containing powder having infrared emission characteristics, and a heat radiating member installed on an outer peripheral surface of the heat radiating pipe, A pipe main body part, and a bending part at least one side of which is bent upward from the pipe main body part, the heat dissipating member is installed on the bending part, and the support unit is provided on the heat dissipating pipe. A base member on which a pipe mounting portion corresponding to the shape of the outer surface is formed; and a coupling member for coupling the base member and the heat radiating pipe. DOO provides an LED lighting fixture for heat dissipation device according to claim.

The pipe body part and the bending part are formed to extend from each other and have a U shape, and a pipe stopper for sealing the working fluid can be installed at the end of the bending part.

The heat dissipating member is opposed to the heat dissipating hub that the heat dissipating pipe penetrates, the first heat dissipating fin projecting radially from the first region on the outer peripheral surface of the heat dissipating hub, and the first heat dissipating fin. A second heat dissipating fin projecting radially from a second region on the outer peripheral surface of the heat dissipating hub, the second heat dissipating fin extending from the heat dissipating hub, and the fin main body And a plurality of branch fins branched from each other.

At least a part of the first heat radiation fin and the second heat radiation fin may have a shape cut out corresponding to a shape of an inner space of a heat radiation case installed while covering the heat radiation unit.

The base member may include a bottom plate that is in direct contact with the LED lighting apparatus, and a heat dissipation space communicating with the outside may be formed inside the bottom plate.

The coupling member includes a coupling plate in which a recessed portion corresponding to the outer peripheral surface of the heat radiating pipe is formed, a first auxiliary heat radiating fin that is formed to protrude from the coupling plate and releases heat of the heat radiating pipe to the outside. Can be included.

According to another embodiment of the present invention, the heat dissipating unit further includes a second auxiliary heat dissipating fin wound around at least a part of the outer peripheral surface of the heat dissipating pipe in order to release the heat of the heat dissipating pipe to the outside. Can be included.

According to still another embodiment of the present invention, the flow that forms a return flow path for moving the working fluid liquefied in the bending portion of the working fluid to the pipe main body portion in the heat radiating pipe. A path forming rib can be formed.

The effect of the heat dissipation device for LED lighting apparatus according to the present invention will be described as follows.

First, the heat radiating pipe is configured to have a pipe main body portion and a bending portion whose both ends are bent upward from the pipe main body portion to facilitate heat transfer from the heat radiating pipe to the heat radiating member. As a result, the heat transfer efficiency is increased while the structure is simple.

Second, the heat radiating member includes a first heat radiating fin and a second heat radiating fin, and the second heat radiating fin includes a fin main body extending from a heat radiating hub and a plurality of branches branched from the fin main body. And at least part of the second radiating fin has a shape cut out corresponding to the shape of the inner space of the radiating case installed while covering the radiating unit. By configuring in this way, it is possible to maximize the heat dissipation effect and at the same time have a compact structure.

Thirdly, a pipe mounting portion corresponding to the shape of the outer side surface of the heat radiating pipe is formed on the top surface of the bottom plate, and a heat radiating space communicating with the outside is formed inside the bottom plate, so that the LED lighting apparatus The heat generated in can be radiated to the outside to the maximum.

Fourth, the coupling plate is formed with a depression corresponding to the outer peripheral surface of the heat radiating pipe, and the upper surface of the coupling plate is formed with a first auxiliary heat radiating fin protruding to release the heat of the heat radiating pipe to the outside. By doing so, the heat generated by the LED lighting apparatus can be radiated to the outside as much as possible.

It is a perspective view which shows the state with which the heat sink for LED lighting fixtures which concerns on this invention was couple | bonded with LED lighting fixtures. It is the perspective view which showed the thermal radiation apparatus for LED lighting fixtures which concerns on this invention. It is the perspective view which showed the 1st Example of the 1st thermal radiation unit with which the thermal radiation apparatus for LED lighting fixtures concerning this invention was equipped. It is the perspective view which showed the 2nd Example of the 1st thermal radiation unit with which the thermal radiation apparatus for LED lighting fixtures concerning this invention was equipped. It is sectional drawing of the thermal radiation pipe which concerns on the 3rd Example of the 1st thermal radiation unit with which the thermal radiation apparatus for LED lighting fixtures concerning this invention was equipped.

Below, with reference to attached drawing, the Example of the thermal radiation apparatus for LED lighting fixtures which concerns on this invention is described.

With reference to FIG. 1 thru | or FIG. 3, one Example of the thermal radiation apparatus for LED lighting fixtures concerning this invention is described concretely.

The LED lighting device heat dissipation device according to the present embodiment includes a support unit 100 coupled to the LED lighting device 10 and a heat radiation unit coupled to the support unit 100.

The LED lighting fixture 10 includes a high-power LED module 13 of 1 W class or higher, a module plate 11 on which the LED module 13 is installed, and a fastening screw 15 for connecting the module plate 11 and the support unit 100. including.

The heat dissipation unit includes a first heat dissipation unit 200 and a second heat dissipation unit 300 that are fastened to the support unit 100. Since the first heat dissipation unit 200 and the second heat dissipation unit 300 have substantially the same structure, only the first heat dissipation unit 200 will be described below.

The first heat dissipating unit 200 includes a heat dissipating pipe 210 containing a medium for transmitting heat generated by the LED lighting apparatus 10 and a working fluid containing powder having infrared emission characteristics, and the heat dissipating pipe 210. And a heat dissipating member 220 installed on the outer peripheral surface.

As the medium, methyl alcohol, ammonia, methyl chloroform, or the like can be used. Here, the medium may be any liquid as long as it has a boiling point lower than that of water at room temperature.

Moreover, a silicate mineral can be used as the powder. Here, the powder may be any mineral as long as it is a mineral that emits infrared rays when heated.

The heat radiating pipe 210 includes a pipe body 215 and a bending part 213 having at least one side end bent from the pipe body 215 in the upper direction.

Specifically, the pipe body 215 and the bending part 213 are extended from each other to have a 'U' shape. Here, the heat radiating members 220 are installed in pairs on the bending part 213.

In particular, after the heat dissipation member 220 is fitted on the outer surface of the bending portion 213, the heat dissipation member 220 is firmly pressure-bonded to the bending portion 213 by expanding the bending portion 213. For example, after the heat radiating member 220 is fitted on the outer surface of the bending part 213, the heat radiating pipe 210 is expanded by supplying a high-pressure fluid into the heat radiating pipe.

As a result, the heat radiating member 220 is brought into close contact with the bending portion 213 and crimped while the bending portion 213 is expanded. Here, the heat radiating pipe 210 may be made of stainless steel, and the heat radiating member 220 may be made of aluminum.

Of course, the present invention is not limited to the above-described embodiment, and the heat dissipating member 220 and the bending portion 213 can be coupled by an adhesive or can be coupled by a separate coupling means.

Before the LED lighting apparatus 10 generates heat, the working fluid is primarily present in the pipe body 215. Thereafter, when heat is generated in the LED lighting fixture 10, the powder emits infrared rays by the heat of the LED lighting fixture 10, and the medium starts to vaporize.

Thereafter, while the vaporized medium moves to the bending unit 213, the heat and the medium are transmitted to the bending unit 213, and at the same time, the powder and the medium transmit radiant heat to the bending unit 213.

Here, since the medium vaporized inside the heat radiating pipe 210 has a property of moving upward, it moves to the bending part 213. As a result, since the heat radiating pipe 210 has a “U” shape, heat transfer from the pipe body 215 to the bending part 213 occurs more effectively.

In particular, since the internal pressure of the heat radiating pipe 210 is in a state of 0.001 mmhg to 0.0001 mmhg, the medium and the infrared radiation in the heat radiating pipe 210 are advanced at a considerably high speed. Since the inside of the heat radiating pipe 210 is maintained in a vacuum state, heat transfer due to the radiant heat occurs greatly. For this purpose, a pipe stopper (250 in FIG. 5) is installed at the end of the bending part 213 to seal the working fluid.

Next, the heat transmitted to the bending part 213 is conducted to the heat radiating member 220 coupled to the bending part 213, and the heat radiating member 220 radiates heat by the external cold air.

The heat dissipating member 220 includes a heat dissipating hub 221 through which the heat dissipating pipe 210 is in close contact, a first heat dissipating fin 223 protruding radially from a first region on the outer peripheral surface of the heat dissipating hub 221, and the first. The second radiating fins 225 are disposed opposite to the radiating fins 223 and project radially from the second region on the outer peripheral surface of the radiating hub 221.

The second heat radiation fin 225 includes a fin body 225c extending from the heat radiation hub 221 and a plurality of branch fins 225a and 225b branched from the fin body 225c. The plurality of branch fins 225a and 225b increase the surface area in contact with external air, and thus are effective in heat dissipation.

Here, at least a part of the first radiating fin 223 and the second radiating fin 225 has a shape cut out corresponding to the shape of the inner space of the radiating case 1 installed while covering the radiating unit. Have. The height at which the first radiating fins 223 and the second radiating fins 225 protrude from the radiating hub 221 is manufactured to have different heights depending on the shape of the radiating case 1.

As a result, the first radiating fins 223 and the second radiating fins 225 are provided in a shape corresponding to the shape of the internal space of the radiating case 1, but maximize the heat exchange area with the external air. To have a shape to obtain.

Meanwhile, the support unit 100 includes a base member 110 and a coupling member 120 for coupling the base member 110 and the heat radiating pipe 210.

The base member 110 includes a bottom plate 111 that is in direct contact with the LED lighting apparatus 10 and a side wall 113 that protrudes from the bottom plate 111 with a certain distance.

A pipe mounting portion 111 a corresponding to the shape of the outer surface of the heat radiating pipe 210 is formed on the upper surface of the bottom plate 111. When the heat radiating pipe 210 is inserted and installed in the pipe mounting portion 111a, the heat exchange area where the heat of the bottom plate 111 is conducted to the heat radiating pipe 210 increases. As a result, the heat of the bottom plate 111 is increased. Is effectively transmitted to the heat radiating pipe 210.

A heat radiating space 111c communicating with the outside is formed inside the bottom plate 111. As a result, the internal space of the bottom plate 111 communicates with the outside while being supported by the internal support ribs 111b.

As a result, the bottom plate itself that is in direct contact with the LED lighting fixture 10 also releases heat generated in the LED lighting fixture 10 to the outside through heat exchange with external air.

The side wall 113 also protrudes from the bottom plate 111 and functions as a single heat radiating fin.

The coupling member 120 is formed with a coupling plate 121 having a depression 121a corresponding to the outer peripheral surface of the heat radiating pipe 210, and a protrusion protruding from the coupling plate 121, and the heat of the heat radiating pipe 210 is released to the outside. 1 auxiliary heat dissipating fins 123 and a fastener 125 for connecting the connecting plate 121 and the base member 110 to each other.

The depressed portion 121a and the pipe placement portion 111a completely cover the outer peripheral surface of the pipe body portion 215 of the heat radiating pipe 210 while being installed to face each other.

As a result, the depressed portion 121a expands the heat exchange area with the heat radiating pipe 210, and the heat transferred from the heat radiating pipe 210 is radiated to the outside by the first auxiliary heat radiating fins 123. It becomes like this.

With reference to FIG. 4, the 2nd Example of the 1st thermal radiation unit with which the thermal radiation apparatus for LED lighting fixtures concerning this invention was equipped is described.

The first heat radiating unit according to the present embodiment is substantially similar to the first heat radiating unit according to the above-described embodiment, and thus detailed description of the same configuration is omitted. However, unlike the above-described embodiment, the first heat radiation unit according to the present embodiment is wound around at least a partial region on the outer peripheral surface of the heat radiation pipe 210 in order to release the heat of the heat radiation pipe 210 to the outside. A second auxiliary heat dissipating fin 240 is included.

The second auxiliary radiating fin 240 is wound around the outer peripheral surface of the radiating pipe 210 while having a wrinkle shape. The second auxiliary radiating fin 240 may be wound in a circular shape around the outer peripheral surface of the radiating pipe, or may be wound in a spiral shape.

Since the second auxiliary radiating fin 240 has a wrinkle shape, the contact area with the external air is increased, and the heat of the radiating pipe 210 is effectively released to the outside.

Of course, the present invention is not limited to the above-described embodiments, and the outer peripheral surface itself can be formed in a wrinkle shape in a partial region of the heat radiating pipe.

With reference to FIG. 5, the 3rd Example of the 1st thermal radiation unit with which the thermal radiation apparatus for LED lighting fixtures concerning this invention was equipped is described. FIG. 5 shows a cross-sectional view of the heat radiating pipe according to the present embodiment.

Since the heat radiating pipe provided in the first heat radiating unit according to the present embodiment is substantially similar to the heat radiating pipe provided in the first heat radiating unit according to the above-described embodiment, a detailed description of the same configuration is omitted. To do. However, unlike the above-described embodiment, the working fluid liquefied through heat exchange in the bending portion 213 is piped inside the heat radiating pipe provided in the first heat radiating unit according to the present embodiment. A flow path forming rib 211 that forms a return flow path for movement to the main body 215 protrudes.

Specifically, a plurality of the flow path forming ribs 211 are installed on the inner peripheral surface of a part of the bending part 213 and the pipe main body part 215 with a certain interval. The interval between the flow path forming ribs 211 forms a return flow path for moving the working fluid from the bending portion 213 to the working fluid initial location S of the pipe body portion.

Further, the pipe plug 250 described in the heat radiating unit according to the first embodiment is installed in the first heat radiating unit according to the present embodiment.

The present invention is not limited to the specific preferred embodiments described above, and anyone who has ordinary knowledge in the technical field to which the invention pertains can be used without departing from the gist of the present invention claimed in the claims for utility model registration. Naturally, various modifications can be made, and such modifications are within the scope of the claims.

The present invention relates to a heat radiating device used for a high-power LED lighting fixture, and can be used not only for street lights such as general roads, government offices, and schools, but also for fish collection lights, and thus can be widely used industrially.

1: heat radiation case, 10: LED lighting fixture, 100: support unit, 110: base member, 111: bottom plate, 113: side wall, 120: coupling member, 121: coupling plate, 123: first auxiliary radiation fin, 200 : First heat radiating unit, 210: heat radiating pipe, 211: flow path forming rib, 213: bending part, 215: pipe main body part, 220: heat radiating member, 221: heat radiating hub, 223: first heat radiating fin, 225: Second heat radiation fin, 240: second auxiliary heat radiation plate, 250: pipe stopper, 300: second heat radiation unit

Claims (8)

A support unit coupled to the LED lighting fixture; and a heat dissipation unit coupled to the support unit;
The heat dissipating unit is installed on the outer peripheral surface of the heat dissipating pipe and the heat dissipating pipe in which the working fluid including the medium for transmitting the heat generated by the LED lighting apparatus and the powder having infrared emission characteristics is built And a heat radiating member
The heat radiating pipe has a pipe main body portion and a bending portion at least one side of which is bent upward from the pipe main body portion, and the heat radiating member is installed on the bending portion,
The support unit includes a base member on which a pipe mounting portion corresponding to the shape of the outer surface of the heat radiating pipe is formed, and a coupling member for coupling the base member and the heat radiating pipe. The heat dissipation device for LED lighting fixtures. The pipe body part and the bending part are formed to extend from each other and have a 'U' shape, and a pipe stopper for sealing the working fluid is installed at an end of the bending part. The heat dissipating device for LED lighting apparatus according to claim 1. The heat dissipating member is opposed to the heat dissipating hub that the heat dissipating pipe penetrates, the first heat dissipating fin projecting radially from the first region on the outer peripheral surface of the heat dissipating hub, and the first heat dissipating fin. A second heat dissipating fin projecting radially from a second region on the outer peripheral surface of the heat dissipating hub, the second heat dissipating fin extending from the heat dissipating hub, and the fin The heat radiating device for LED lighting apparatus according to claim 1, comprising a plurality of branch fins branched from the main body. At least a part of the first heat radiation fin and the second heat radiation fin has a shape cut out corresponding to a shape of an inner space of a heat radiation case installed while covering the heat radiation unit. The heat radiating device for LED lighting apparatus according to claim 3. 2. The LED lighting apparatus according to claim 1, wherein the base member includes a bottom plate that is in direct contact with the LED lighting apparatus, and a heat dissipating space communicating with the outside is formed in the bottom plate. Heat dissipation device. The coupling member includes a coupling plate in which a recessed portion corresponding to the outer peripheral surface of the heat radiating pipe is formed, a first auxiliary heat radiating fin that is formed to protrude from the coupling plate and releases heat of the heat radiating pipe to the outside. The heat dissipating device for an LED lighting apparatus according to claim 1, comprising: The heat dissipating unit may further include a second auxiliary heat dissipating fin wound around at least a part of the outer peripheral surface of the heat dissipating pipe to release heat of the heat dissipating pipe to the outside. The heat radiating device for LED lighting fixtures of description. A flow path forming rib for forming a return flow path for moving the working fluid liquefied in the bending portion of the working fluid to the pipe main body portion is formed in the heat radiating pipe. The heat radiating device for LED lighting apparatus according to claim 1.

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