KR20120104960A - Led lighting instrument with excellent heat dispersing function - Google Patents

Abstract

PURPOSE: An LED lighting apparatus with an excellent heat dissipation function is provided to allow a working fluid to flow smoothly since an evaporation part is placed on a lower position than a condensation part by vertically connecting a heat pipe to a substrate. CONSTITUTION: An inserting hole is formed on an upper center portion of a case. A heat pipe(300) is installed to be vertical to a substrate passing through the inside of the case. A heat dissipation member(400) is connected to an upper portion of the heat pipe exposed to the outside of the case. The heat dissipation member includes a cylindrical body(420) in which a connection hole(440) is formed. A plurality of heat radiation fins(410) is connected to the external circumference of the cylindrical body radially.

Description

LED Lighting Fixture with Excellent Heat Dissipation {LED LIGHTING INSTRUMENT WITH EXCELLENT HEAT DISPERSING FUNCTION}

The present invention relates to an LED luminaire, and more particularly, to an LED luminaire for discharging high heat inside the luminaire to the outside using a heat pipe.

A light emitting diode, in particular a power LED (Light Emitting Diode), is a kind of semiconductor, and uses a phenomenon in which electrical energy is changed to light energy and thermal energy to emit light. Currently, it is used in electronic signs, street lamps, floodlights, fishing lamps, and harbor lights, and has the advantage of realizing various colors of light.

In the lighting device using the LED, the substrate on which the LED is mounted is embedded in the inside of the housing 20, and the cover 40 is installed at the lower portion thereof, and the support 50 is coupled to the portion connected to the prop. There is a problem in that the heat generated from the high-power LED and the internal heat caused by the sun or the radiant heat inside the luminaire cannot be effectively discharged to the outside. Not only does it degrade, but it also shortens its lifespan.

Therefore, in the related art, as shown in FIG. 1, heat radiation holes 30 are formed in the upper, lower, and side surfaces of the housing 20 of the LED lighting apparatus 10 to transfer heat inside the LED lighting apparatus 10 to the outside. It has been dissipated.

However, the conventional LED lighting device 10 is not easy to heat exchange with the outside, and the heat dissipation efficiency is not only lowered, but also rainwater or insects, foreign substances, etc. are introduced through the heat dissipation holes 30 which are always open. Therefore, since the function is stopped by corroding or failing the LED lighting fixture, there is a problem that the number of repairs increases and further shortens the life of the LED lighting fixture.

In addition, as shown in Figs. 2 (a) and 2 (b), the heat pipe 80, which is conventionally installed in the LED lighting fixture, is connected to the heat pipe 80 on the substrate 60 on which the LED 65 is mounted. ) Is horizontally connected and fixed, and a plurality of heat dissipation fins 70 are connected to the heat pipe 80, and by injecting a working fluid into the heat pipe 80 and then evacuating the heat pipe 80, When the evaporator at one end of the heating is heated, the working fluid stored therein is vaporized to generate pressure difference at both ends. According to the pressure difference, the working fluid moves to the condenser and releases heat to the surroundings. After cooling through, it is returned to the evaporation unit to cool the heat generated from the LED.

However, since the conventional heat pipe 80 is installed in the horizontal direction with the substrate 60, when the heat pipe 80 cannot be leveled, the evaporator is positioned above the condensing part, so that the working fluid flows. This is not smooth, there is a problem that the heat radiation function is greatly reduced.

On the other hand, Japanese Patent Laid-Open No. 2008-108721 discloses a heat pipe and a heat dissipation member connected to an upper end of the heat pipe. However, in the above publication, the heat dissipation fins F are formed on the body of the heat dissipation member, and there are only fixing holes through which the heat pipe can be fixed to the lower side of the body of the heat dissipation member.

Since the upper part of the heat pipe is attached to the fixing hole, the heat dissipation efficiency is inevitably lowered. Furthermore, since the top of the heat pipe is buried in the heat dissipating member body, the heat dissipating member body heats the top of the heat pipe. Rather, there is a problem that the heat radiation efficiency may be lowered in some cases.

Japanese Patent Laid-Open No. 2008-108721 Republic of Korea Patent Publication No. 2010-112831

The present invention has been made to solve the above-described problems, heat radiating means and the heat radiating member is formed so as to be exposed to the outside of the case to radiate heat inside the luminaire generated by the radiant heat or LED inside the sun or lighting fixtures It can be discharged directly to the outside, so that heat dissipation is quick and easy and cooling efficiency is greatly increased. By connecting the heat pipe to the substrate in the vertical direction, the evaporator is located below the condensation unit, which greatly improves the flow of working fluid. It is an object of the present invention to provide an LED lighting device having excellent heat dissipation.

In order to achieve the above object, the present invention provides an LED lighting apparatus in which a substrate on which an LED is installed is provided, comprising: a case having an insertion hole formed in an upper center thereof; A heat pipe installed in a direction perpendicular to the substrate by penetrating the inside of the case and having an upper portion exposed to the outside of the case through the insertion hole; and an upper portion of the heat pipe exposed to the outside of the case. Further comprising a heat dissipation member connected to the heat dissipation member 400 is provided with a cylindrical body 420 having a connection hole 440 therein, a plurality of heat dissipation fins 410 on the outer periphery of the cylindrical body 420 ) Is radially connected, and the upper portion 310 of the heat pipe is exposed to the outside of the case 200 through the insertion hole 210 to be closely inserted into the connection hole 440 of the heat dissipation member 400. It provides an excellent LED lighting device, characterized in that the heat dissipation.

Preferably, the heat dissipation fin is characterized in that one or more wings are connected.

Also preferably, the plurality of heat dissipation members may be installed in multiple layers, and the heat dissipation fins of the plurality of heat dissipation members may be installed to cross each other.

Also preferably, the heat pipe and the heat dissipation member are characterized in that at least a portion of the surface is coated with a ceramic coating material.

Also preferably, the case is characterized in that a plurality of pins are formed on the top.

More preferably, the case is characterized in that the drainage is formed between the pin and the pin.

In addition, the case is characterized in that the inner wall of the insertion hole is formed to extend inward to form a space in which the heat pipe is inserted.

According to the present invention, ① the heat generated from the LED substrate 110 rides on the heat pipe 300 exposed to the outside while penetrating the case 200 vertically through the insertion hole 210, the upper portion 310 in an instant. Is delivered to, ② the top of the heat pipe 310 is radiated to the outside quickly through the heat radiation fin 410 connected radially to the outer circumference of the cylindrical body 420 of the heat dissipation member 400, ③ the top 310 of the heat pipe In addition, since the upper part of the heat pipe, the cylindrical body and the heat dissipation fin are almost integrated with the cylindrical body 420 having the connection hole 440 formed therein, heat transfer is optimal.

That is, the thickness of the cylindrical body of the heat dissipation member is as thin as the thickness of the heat dissipation fins and is very thin, about tenths of the thickness of the heat pipes. There is no element that prevents heat dissipation of the heat pipe. In addition, the cylindrical body also has a structure in which the center hole is opened by the central connection hole, and the cylindrical body itself acts as a kind of heat radiation fin.

That is, since the heat pipe and the heat radiating member, which are heat radiating means, are exposed to the outside of the case, the radiant heat inside the sun or the lighting fixture and the heat inside the lighting fixture generated by the LED can be directly discharged to the outside. Not only is easy, but the cooling efficiency is greatly increased, and by connecting the heat pipe to the substrate in the vertical direction, the evaporator is located at a lower position than the condensation unit, so that the working fluid flow is greatly smoothed.

1 is a schematic diagram of a conventional LED lighting fixture.
2 is a schematic view showing a conventional heat pipe.
Figure 3 (a) is a side cross-sectional view showing the configuration of the LED lighting fixture according to an embodiment of the present invention, Figure 3 (b) is a side cross-sectional view showing an enlarged portion.
4 is a view showing the configuration of a case of the LED lighting apparatus according to an embodiment of the present invention, (a) is a top perspective view of the heat pipe is inserted, (b) a bottom perspective view of the heat pipe is not inserted, ( c) is a bottom perspective view of the heat pipe inserted thereto.
Figure 5 is a perspective view showing the configuration of the case of the heat pipe is not inserted connection of the LED lighting apparatus according to an embodiment of the present invention.
6 is a view showing the configuration of the heat dissipation member of the LED lighting apparatus according to an embodiment of the present invention, (a) is a perspective view, (b) is a plan view, (c) a plurality of heat dissipation members and the top of the heat pipe Connected perspective view.
Figure 7 is a view of the appearance of the LED lighting fixture according to an embodiment of the present invention, (a) is a side view, (b) is a front view.
8 is a state diagram used in the LED lighting fixture according to an embodiment of the present invention.

Hereinafter, the configuration of the present invention will be described in detail with reference to the drawings.

The present invention is formed so that the heat pipe and the heat dissipation member, which is a heat dissipation means, to be exposed to the outside of the case can directly discharge the high heat inside the luminaire generated by the sun's radiant heat or LED to the outside as well as quick and easy heat dissipation In addition, the cooling efficiency is greatly increased, and by connecting the heat pipe to the substrate in the vertical direction, the evaporator is positioned at a lower position than the condensing unit, so that the flow of the working fluid is greatly smoothed.

As shown in FIGS. 3 and 4, the LED lighting device 100 according to the present invention includes a case 200 and a substrate 110 having an LED 115 mounted on a lower side of the case 200. Is installed, the cover 500 is mounted to the lower side of the substrate, the support 600 connected to the support 700 to the rear side of the case 200 is coupled.

At this time, the case 200 is preferably formed to form a curved surface, the insertion hole 210 is formed in the upper center.

In addition, the heat pipe 300 is installed in the direction perpendicular to the substrate 110 to dissipate heat inside the case 200, the heat pipe 300 has a pipe shape, one end of the substrate The heat generated from the substrate 110 on which the LED 115 is mounted as a heat source is connected to the substrate 110 in a vertical direction so as to be in contact with the substrate 110. The heat may be transferred to the heat pipe 100. When the heat pipe 300 connected to the substrate 110 in the horizontal direction is vertically connected to the substrate 110, when the conventional heat pipe is not horizontal, movement and return of the working fluid may not be smooth, and the heat dissipation effect is greatly reduced. Can solve the problem.

The heat pipe 300 penetrates the inside of the case 200 so that the upper portion 310 of the heat pipe is exposed to the outside of the case 200 through the insertion hole 210. As such, the upper part 310 of the heat pipe is exposed to the outside of the case 200, and the upper part 310 of the heat pipe exposed to the outside is closely coupled with the heat dissipation member 400, thereby radiating heat inside the sun or the lighting fixture. And since the high heat generated by the LED can be directly discharged to the outside of the case, heat dissipation is quick and easy, and cooling efficiency is greatly increased.

In addition, the heat pipe 300 is a vacuum inside, made of a metal having excellent thermal conductivity, such as copper, stainless steel, ceramics, tungsten, the inside of the working fluid is built in the heat inside the luminaire to the outside Will be released. Here, the working fluid is made of one or more selected from methanol, acetone, water, mercury is used as a heat transfer medium.

And, as shown in Figure 6, the heat radiation member 400 is connected to the upper portion 310 of the heat pipe exposed to the outside, the heat radiation member 400 is a cylindrical body formed with a connection hole 440 therein 420 is provided, and a plurality of heat dissipation fins 410 are radially connected to the outer circumference of the cylindrical body 420, and the heat dissipation fins 410 have at least one wing 430 having a 'V' shape. It is preferable to combine the above to increase the contact area with the outside air to the maximum to increase the heat radiation efficiency.

In addition, the heat dissipation member 400 is preferably made of aluminum having excellent thermal conductivity or an aluminum alloy material having high strength at high thermal conductivity.

Here, as shown in Figure 6 (c), the plurality of heat dissipation member 400 is installed so as to be stacked in a multi-layer, the heat dissipation fins 410 of the plurality of heat dissipation member 400 are installed so as to cross each other by the outside air Heat dissipation effect is very excellent because heat inside the luminaire is quickly dissipated to the outside by making maximum contact with.

In addition, the heat pipe 300 and the heat dissipation member 400 is preferably at least a portion of the surface is coated with a ceramic coating material, the ceramic coating material is applied by air injection or the like to form a coating film, the surface coated in this way Is more irregular and uneven than the original surface, so the surface area can be increased to maximize the heat dissipation effect, maintain excellent electrical insulation, suppress the leakage or discharge of electricity, and prevent the oxidation and corrosion of the surface to improve durability. have.

As shown in Figure 5, the case 200 has a seating groove 220 is formed on the outside of the insertion hole 210 of the upper center, the seating groove 220 is a groove made of a substantially circular, the seating At least one heat dissipation member 400 is mounted in the groove 220, and an upper portion 310 of the heat pipe is exposed to the outside of the case 200 through the insertion hole 210 to connect the heat dissipation member 400. It is tightly inserted into the hole 440.

At this time, the upper part 310 of the heat pipe is cooled and the connection hole 440 of the heat dissipation member 400 is heated, and the upper part 310 of the heat pipe is connected to the connection hole 440 of the heat dissipation member 400. After insertion, it is to be closely bonded at room temperature, or separately by curing with heat to remove the space between the heat pipe and the heat dissipation member to be tightly coupled, thereby lowering the thermal resistance coefficient can further increase the heat dissipation efficiency.

Here, the seating groove 220 is a stepped portion 230 is formed on the inside, as shown in Figure 3, the stepped portion 230 is coupled to the case 200 through the packing member 240 via While providing elasticity between the heat pipes 300 and at the same time to form a watertight seal, the packing member 240 is supported by a support member 245 coupled to the seating groove 220 thereon, the support The member 245 may be coupled to the seating groove 220 via a screw, but there is no particular limitation on the coupling manner.

Here, the packing member 240 has a form of a circular ring to surround the outer circumferential surface of the heat pipe 300, the packing is made of rubber or silicon and is configured to be waterproof by being made of rubber or silicon.

In addition, as shown in FIG. 4, the case 200 has an inner wall of the insertion hole 210 extending in the vertical direction toward the inner side to form a space portion 270 into which the heat pipe 300 is tightly inserted. do.

On the other hand, as shown in Figure 4 and 5, the upper portion of the case 200, a plurality of fins 250 is preferably formed along the longitudinal direction of the long side of the case 200, the heat of the sun or Radiant heat inside the LED lighting fixture can be directly discharged to the outside through a plurality of fins 250 formed on the upper portion of the case 200 made of a metal having excellent thermal conductivity such as aluminum.

At this time, the drainage path 260 is formed between the pin 250 and the pin 250 so that rainwater or moisture flowing from the outside does not stay in the seating groove 220 for a long time and can be easily discharged to the outside immediately. .

Hereinafter, the operation relationship of the LED lighting apparatus according to the present invention will be described in detail with reference to the drawings.

In the LED luminaire shown in the embodiment of FIG. 8, the internal temperature is increased due to the sun and the radiant heat inside the luminaire during the day, and the temperature is increased because the light is concentrated from the LED 115 while the LED luminaire is operating. The heat inside the LED luminaire is transferred to the heat pipe 300 made of a material having excellent thermal conductivity, which is connected to the substrate 110 in a vertical direction.

The heat transferred to the heat pipe 300 is vaporized by heating the working fluid of the liquid contained in the heat pipe 300, the vaporized working fluid is the upper portion of the heat pipe exposed to the outside of the case 200 ( 310 to rise to the side when the heat is taken away from the heat radiating member 400 is changed back to the liquid phase is lowered,

The heat transferred from the heat pipe 300 by the plurality of heat dissipation fins 410 formed radially connected to the outer circumference of the heat dissipation member 400 and the V-shaped wings 430 connected to the heat dissipation fins. Since the heat dissipation is quickly performed to the outside without being stagnant, the heat dissipation effect is excellent, and the upper part 310 and the heat dissipation member 400 of the heat pipe are exposed to the outside of the case 200, thereby making contact with external cold air. Since the cooling effect is excellent, the heat inside the LED luminaire quickly rises to the outside and then cools, thereby providing excellent heat dissipation effect.

In addition, in the case of LED lighting fixtures, the substrate may not be level when used. In this case, since the evaporation part is located at a high place, the heat dissipation effect is inevitably deteriorated because movement and return of the working fluid are not smooth. In the present invention, by connecting the heat pipe to the substrate in the vertical direction, the flow of the working fluid is greatly smoothed and the heat radiation efficiency is increased.

Although the present invention has been described in detail with reference to the embodiments shown in the accompanying drawings, the embodiments described in the present invention as an example, the present invention is not limited thereto, and various modifications may be made without departing from the scope of the present invention. It is clear that variations are possible. In addition, any thing having substantially the same structure and the same effect as the technical idea described in the claim of the present invention is included in the technical scope of this invention.

Background
10. LED lighting fixture 20. Housing
30. Heat Sink 40. Cover
50. Support 60. Substrate
65.LED 70.heat sink
80. Heat Pipe
* Present invention
100. LED Lighting Fixture 110. Substrate
115.LED 200.Case
210. Insertion hole 215. Inner wall
220. Seating groove 230. Stepped part
240. Packing member 245. Support member
250.pin 260.drain
270. Space section 280. Flange section
300. Heat pipe 310. Top of the heat pipe
400. Heat dissipation member 410. Heat dissipation fin
420.Body 430. Wings
440. Connecting Hole 500. Cover
600. Support 700. Shore

Claims (7)

In the LED luminaire in which the board | substrate with LED was installed,
A case having an insertion hole formed at an upper center thereof;
And a heat pipe installed in a direction perpendicular to the substrate by penetrating the inside of the case and having an upper portion exposed to the outside of the case through the insertion hole.
Further comprising a heat dissipation member connected to the upper portion of the heat pipe exposed to the outside of the case,
The heat dissipation member 400 is provided with a cylindrical body 420 having a connection hole 440 therein,
A plurality of heat dissipation fins 410 are radially connected to the outer circumference of the cylindrical body 420,
The heat dissipation function of the heat pipe 310 is exposed to the outside of the case 200 through the insertion hole 210 and closely inserted into the connection hole 440 of the heat dissipation member 400. Excellent LED Lighting Fixtures. The method of claim 1,
The heat dissipation fin is an LED light fixture excellent in heat dissipation, characterized in that one or more wings are connected. The method of claim 1,
The plurality of heat dissipation member is installed in a multi-layer, LED light fixture having excellent heat dissipation function, characterized in that the heat dissipation fins of the plurality of heat dissipation members are installed to cross each other. The method of claim 1,
The heat pipe and the heat dissipation member LED lighting fixtures having excellent heat dissipation, characterized in that at least a portion of the surface is coated with a ceramic coating material. The method of claim 1,
The case is an LED lighting device excellent in heat dissipation, characterized in that a plurality of fins are formed on the top. The method of claim 5,
The case is an LED lighting device excellent in heat dissipation, characterized in that the drainage is formed between the pin and the pin. The method of claim 1,
The case is an LED light fixture having excellent heat dissipation, characterized in that the inner wall of the insertion hole is formed to extend inward to form a space in which the heat pipe is inserted.

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