KR20160131686A - The LED lighting device which the air circulating fan setted in the inside of the closed space - Google Patents

The LED lighting device which the air circulating fan setted in the inside of the closed space Download PDF

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Publication number
KR20160131686A
KR20160131686A KR1020150064620A KR20150064620A KR20160131686A KR 20160131686 A KR20160131686 A KR 20160131686A KR 1020150064620 A KR1020150064620 A KR 1020150064620A KR 20150064620 A KR20150064620 A KR 20150064620A KR 20160131686 A KR20160131686 A KR 20160131686A
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South Korea
Prior art keywords
closed space
air
motor
circulation fan
led module
Prior art date
Application number
KR1020150064620A
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Korean (ko)
Inventor
신성복
김신호
Original Assignee
주식회사 브라이트론
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Priority to KR1020150064620A priority Critical patent/KR20160131686A/en
Publication of KR20160131686A publication Critical patent/KR20160131686A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
    • F21V29/67—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • F21S2/005—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction of modular construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S9/00—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F21V19/003—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

A closed precursor in which a closed space is formed so that the inside air is blocked from outside air;
An LED module positioned within the closed space of the sealing precursor;
A circulation fan for diffusing the generated heat of the LED module into the whole of the closed space;
A motor installed outside the closed space connected to the circulation fan;
An electric power supply unit for supplying electric power to the LED module and the motor;
And an LED lighting device in which a circulation fan is installed inside the closed space and a motor is installed outside the closed space.

Description

[0001] The present invention relates to an LED lighting device in which a circulating fan is installed in a closed space and a circulating motor is installed inside or outside a closed space.

The present invention relates to an LED lighting device provided with a cooling device. More particularly, the present invention uses a circulating fan for firstly diffusing heat generated in an LED module into an entire interior of a closed space without a large metal heat sink for discharging heat generated from the LED to the outside. And a motor is installed inside or outside of the closed space, so that the LED lighting apparatus can be manufactured light and inexpensively.

Generally, the heat dissipation of an LED lighting device is configured to connect a heat conduction metal to a heat source and expose a certain portion of the heat conduction metal to the outside in order to allow the heat transferred by the heat conduction metal to be released through the outside air.

Sometimes, the outer shape of the thermally conductive metal is formed in the shape of a radiating fin so that the outer air contact surface area is maximized.

However, in such a case, metal is generally formed of copper, aluminum, magnesium or the like, and as the output of the LED increases, the metal body for heat dissipation becomes larger, and the weight becomes heavy due to the volume thereof.

The heat dissipating fins are forced to supply external air by adding a heat dissipating fan to the LED for heat dissipation, which causes dust and the like to get stuck over time and the cooling efficiency is lowered.

A typical heat dissipation structure uses a method of increasing the surface area in order to transfer heat generated by bringing the external air into contact with the heat dissipation area. In this case, the heat-radiating structure is generally made of a metal-based material, and a heat-dissipating structure is formed by using a material having good heat-dissipation, that is, heat-transferable material.

In order to solve the above problem, it is not necessary to enlarge the heat-radiating structure if the flow of air is forced to the primary heat sink directly attached to the heat source by using a fan to lower the temperature at which heat is generated in the heat source. However, the disadvantage of the fan structure is that the dust is ending together with the air flow, so that the function of the fan can not be performed for a long time and the problem of the rotation sound of the fan is still left.

Prior art literature

(Patent Document 0001) Korean Patent Publication No. 10-2014-0044832 (April 15, 2014)

(Patent Document 0002) Korean Patent Registration No. 10-1280982-00-00 (Jul. 08, 2013)

(Patent Document 3) Korean Patent Publication No. 10-2013-0136019 (December 12, 2013)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide an internal LED module in which internal air is repeatedly circulated by using a circulating fan in a closed space without a large metal heat sink for discharging heat generated from the LED to the outside, And the heat of the sealing precursor heated due to the internal air in the closed space is released to the outside through the outside air in contact with the outer surface of the closed precursor In this case, the circulation fan is installed inside and the motor is installed inside or outside of the closed space, so that it is possible to manufacture the LED lighting device which can be manufactured in a light and inexpensive manner in which the risk of fire due to heat or electric overheating is reduced, .

In order to achieve the above-mentioned object, in order to constitute an LED lighting device in which a circulating fan is installed in a closed space according to the present invention and a motor is installed inside or outside the closed space, A formed sealing precursor;

An LED module positioned within the closed space of the sealing precursor; A circulation fan for diffusing the generated heat of the LED module into the whole of the closed space;

A motor installed inside or inside the closed space connected to the circulation fan;

An electric power supply unit for supplying electric power to the LED module and the motor;

.

The closed precursor is formed by combining a front cover in the light emitting direction and a rear cover on the opposite side in the light emitting direction in forming the closed space, wherein the front cover is one of glass and plastic capable of passing a predetermined amount of light Configure

It is preferable that the rear cover is made of one or more of glass, plastic, metal, and ceramic.

The total volume of the sealing precursor including the space volume of the sealing precursor may be such that the amount of heat dissipable by natural contact with the outside air at the entire outer surface of the sealing precursor is greater than the heat dissipation amount generated by the LED module It is preferable to calculate and design it.

Here, the LED module may include a plurality of micro holes that completely pass from the rear surface of the metal PCB to the upper surface of the metal PCB so that the air passing through the circulation fan can pass therethrough.

In the LED module, a plurality of micropins may be formed on the rear surface of the metal PCB so that the air passing through the circulation fan may pass.

Preferably, the LED module has a micromechanical mesh on the rear surface of the metal PCB so that the air passing through the circulation fan can pass.

Further, it is more preferable that the inside air in the closed space of the sealing precursor is air having a humidity of 40% or more.

It is preferable that the electric supply unit further includes an SMPS module adapted to apply a proper current and voltage to the LED module and the circulation fan.

In the structure of the cooling device of the LED lighting lamp which requires heat, the circulating fan is installed inside the closed space as an internal circulating fan in the closed space without a large metal heat sink for discharging the internal heat to the outside, So that the heat generated in the inner LED module is firstly diffused into the entire air inside the closed space of the closed precursor, and then the heat generated in the closed precursor heated by the air inside the closed space And the heat is radiated to the outside through the outside air which is in contact with the outer surface of the LED lighting device. Thus, the LED lighting device can be produced light and inexpensively.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view illustrating a configuration of an LED lighting apparatus in which a circulation fan is installed in a closed space according to an embodiment of the present invention and a motor connected to a circulation fan is installed inside or outside. FIG.
FIG. 2 is a perspective view illustrating a configuration of an LED lighting device in which a circulation fan is installed in a closed space according to another embodiment of the present invention and a motor connected to a circulation fan is installed inside or outside. FIG.
FIG. 3 is a cross-
Fig. 4 is an enlarged view of a micro hole formed in the metal PCB, and Fig.
5 is a cut-away perspective view of an existing LED lighting device.
Figure 6 is a cutaway perspective view of another embodiment of an existing LED lighting device

The conventional technique is shown in Figs. 5 to 6. Fig.

The following description will be focused on the drawings.

FIGS. 5 to 6 are perspective views of conventional LED lighting. As a result, the body of the LED lighting apparatus can be visually recognized due to the metal block 11. FIG. In general, an illumination bulb having a power of less than 10 W generally does not require a large metal block 11, but bulbs having a large power consumption of 10 watts or more are heavy due to the metal block 11, and the cost is also high. For example, in high power LED lighting devices of 80 W to 150 W, such as LED street lamps and LED factories, the weight is 8 kg to 20 kg, so it is difficult to handle the lighting device and high cost is required for the LED lamp It is becoming an obstacle to spreading.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

1 is a cutaway perspective view showing a configuration of a circulating fan in a closed space according to the present invention and a LED lighting device provided with a motor connected to a circulating fan inside or outside the closed space.

The present invention is applied to a bulb in which a fan and a fan are arranged on the side in the form of a pin, and a motor and a fan are disposed on the side of the fan. The circulation fan is installed in the closed space according to the present invention, The apparatus is roughly composed of the airtight precursor 100, the LED module 200, the circulating fan 400, and the electric supply unit 500.

The closed precursor 100 has a structure in which a closed space 101 is formed in the inside of the closed precursor 100 so that outside air can not be introduced into the inside. Is configured to be filled with gas such as air in the empty space (101), and the inside air is also completely sealed by the sealing precursor (100) so that it can not escape to the outside. The closed precursor 100 is formed by combining a front cover 100a in the light emitting direction and a rear cover 100b on the opposite side in the light emitting direction in forming the closed space 101, The front cover 100a may be formed of any one of glass or plastic capable of passing a certain amount of light, or may be formed of one or more complex materials.

The rear cover 100b may be formed of any one of glass, plastic, metal, and ceramics, or may be formed of one or more complex materials.

Here, while the conventional heat radiator has the body of the thick metal block 11,

The sealing precursor 100 is generally composed of a front cover 100a and a rear cover 100b, and the body has an empty shape. On the other hand, the total volume including the volume of the space of the sealing precursor 100 is set such that the amount of releasable heat due to natural contact with the outside air at the entire outer surface of the sealing precursor 100 is larger than the amount of heat generated by the LED module It is preferable to design it so as to be larger.

At this time, it is more preferable that the outside ambient air is calculated assuming that there is no mobility and the air is stopped. Subsequently, the LED module 200 includes a metal PCB 200b and an LED light emitting device 200a, both of which are fixed in the sealing precursor 100 and generate heat as a source of light emission. Generally, if heat is stagnated in the LED module 200, the module is broken or the efficiency of light emission is lowered, so that heat must be quickly released to another place.

On the other hand, the LED module 200 may include a plurality of micro holes 200c having a diameter of 1 mm or less, a plurality of micro-pins having a diameter of 1 mm or less, May be configured to form any one of the micrometal meshes, or to form one or more of the multiple composites.

At this time, the microhole 200c is formed so as to completely pass from the rear surface portion to the upper surface of the metal PCB 200b so that the air passing through the circulation fan 400 can pass therethrough. In the case of forming the micro-pins, it is preferable that a plurality of micro-pins are formed on the rear surface of the metal PCB 200b. Also, in the case of using a micrometal mesh, it is preferable to be attached to the rear side of the metal PCB 200b. The microholes, the pins, and the meshes may be formed to be combined together to increase the heat radiation efficiency.

The circulation fan 400 is disposed in the airtight precursor 100 and diffuses heat generated in the LED module 200 into the precursor. The circulation fan 400 includes a rotation motor 400a and a rotation fan 400b ), And the wind generated by the rotary fan is fixed inside so as to be positioned toward the LED module. The operation of the circulation fan 400 causes the internal air to circulate in the airtight precursor 100, so that the temperature of the internal air becomes high. As a result, the heat generated in the LED module 200 is diffused and moved to the entire air inside the airtight precursor 100. Since the heat diffused into the entire inner air comes into contact with the inner wall of the sealing precursor 100, the temperature of the sealing precursor 100 itself becomes higher and finally released into the outside air contacting through the outer surface of the sealing precursor 100.

The heat dissipation process replaces the process of first diffusion of the heat generated from the LED module 20 to the outer surface of the metal block in the conventional metal block 11 of FIGS. 5 to 6, 11) can be performed.

1 and 2, a plurality of micro-holes or pins formed of the micro-unit or less increase not only the heat dissipation surface area when circulating the air in the circulation fan 400, Since the internal air circulation in the space 101 is free from contamination by external dust or the like, it is possible to maintain the state of having the initial cooling efficiency permanently and continuously.

Subsequently, it is preferable to use air having a humidity of 40% or more as the inside air in the closed space 101 of the sealing precursor 100. The higher the humidity of the air, the higher the latent heat effect, so that more heat can be transferred and diffused at the same volume of air and at the speed of movement.

The inside air in the closed space 101 of the closed precursor 100 is a gas or a complex organic hydrocarbon such as methanol having a low vaporization point after the closed space 101 is made in a vacuum state in place of air, Ionic liquid or the like may be used.

That is, the internal air may be used in a wide range of various gases for which the present invention is ideally intended. Subsequently, the electric supply unit 500 is connected to a closed space connected to the closed space circulation fan 400 or an external motor 400a, and supplies electricity to the LED module 200.

The electric power supply unit 500 may further include a motor 400a connected to the LED module 200 and the circulation fan 400 in the closed space and an SMPS module adjusted to apply an appropriate current and voltage .

FIG. 2 is an embodiment in which the fan is directly installed in the LED metal block. In FIG. 2, the heat-dissipating fan is placed on the rear surface of the LED module. In order to increase the size of the closed space, An internal air circulation passage (301) is provided in a part to secure a space to help cooling the module.

FIG. 3 is a plan view of a metal PCB of an LED module according to the present invention.

FIG. 4 is an enlarged view showing an enlarged view of the microhole. The microhole 200c has an effect of increasing the contact area of the internal air circulated by the circulating fan 400 with heat generated in the LED module 200 have.

As the size of the microhole (200c) becomes smaller and larger, the internal air contact surface area becomes larger and the heat radiating effect is increased. In this case, there is no concern about the inflow of external air, so that it is possible to form a hole in the nano meter unit which is technically possible in order to further increase the internal air contact surface area.

1 to 4, the overall operation of the LED lighting apparatus having the circulation fan installed in the closed space according to the present invention will be described along with the flow of heat. First, when the LED module 200 is operated by the electricity supplied through the electric supply unit 500, the LED 200a of the LED module 200 emits light and generates heat.

The generated heat of the LED 200a is transmitted to the metal PCB 200b and then to the inner air contacting the inner surface of the metal PCB 200 and the micro hole 200c formed on the metal PCB. Here, since the volume of the metal PCB 200b is much smaller than the volume of the sealed prism 100 including the volume of space, the heat generated in the LED can be supplied to the inside air .

At this time, the circulating fan 400 is also operated by the electric power supplied through the electric supply unit 500, so that the internal air heated by the rotation of the rotating fan 400b flows through the metal PCB surface and the metal PCB Through the micro hole (200c) formed in the sealing precursor (100).

Therefore, the heat of the LED module 200 is transferred to the entire interior of the closed space 101 by the heated internal air which repeatedly forcibly circulates the closed space 101 in the closed precursor 100 with the passage of time Resulting in diffusion.

Subsequently, the high-temperature internal air diffused in the waste space 101 comes into contact with the inner surface of the sealing precursor 100, and consequently the temperature of the sealing precursor 100 becomes high.

The heat transferred from the LED module 200 in the internal closed space 101 to the sealing precursor 100 through the above process is transferred to the outside air naturally in contact with the outer surface of the sealing precursor 100 And finally discharged to the external space.

In the above-described configuration, a circulation fan is installed in the closed space as an internal circulation fan in a closed space without a large metal heat sink for discharging internal heat to the outside, and a motor 400a having a circulation fan connected to the inside or outside of the closed space is installed So that the heat generated by the inner LED module is firstly diffused into the entire air inside the closed space of the closed precursor, and the heat of the closed precursor heated by the air in the closed space continues to flow to the outside And a heat radiation structure is formed so as to be discharged to the outside through the outside air in contact with the surface.

As described above, the LED lighting apparatus having the circulation fan installed in the closed space according to the present invention can be manufactured light and inexpensively.

Example

In the present invention, the first metal heat-radiating structure quickly induces the flow of air through the fan and uses a light material such as plastic or glass to make the surface area equal to the surface area of the heat sink metal having no conventional fan structure, As soon as they are scattered to the waste space, the surface area of the heat sink is equal to the surface area of the actual metal system, and the heat dissipation is the same as the surface area of the metal system.

At this time, the flow of air becomes the same as the phenomenon in which heat energy is transferred to the air, which is the flow of the air that the conventional fanless heat sink touches to the surface, that is, the air, and the heat is released due to the convection phenomenon.

First Embodiment

If the total weight of the heat sink is 100kg and the heat radiator has the maximum heat dissipation surface area, the same surface area is made into the closed section structure and the fan structure or the first heat sink is manufactured therein.

At this time, the primary heat sink is installed with a fan around the heat sink, and it is based on the fact that it is heated in the general atmosphere based on the fact that it does not rise by the predetermined temperature.

When blowing air into the primary heat sink with a fan, it quickly dissipates into the waste space air, keeping the overall temperature at the same temperature as the conventional metal-based heat sink. That is, the temperature of the air in the closed space is equal to the heat radiation surface temperature of 100 kg.

At this time, the heat radiation level of the portion where the air contact with the metal heat sink contacts the convection phenomenon of the air and the material made of the plastic or other light material constituting the waste space contact with the air is almost the same level. This is because the temperature of the air in the closed space is leveled in the heat sink having the primary fan structure, so that the heat radiation at the portion where the air is in contact with the actual surface area can induce the heat radiation irrespective of the material having good thermal conductivity.

Second Embodiment

As a result of experimenting with existing heat dissipation products, the 36 watt LED of POSCO Co., Ltd. was compared with the present invention product. As a result, the LED weight of POSCO Co., Ltd. was 620 g. It is only 9.4% compared with the conventional one

Third Embodiment

In addition, a 300 watt LED pick-up lamp (such as a fish catch) has a total weight of 40 kg, and the weight of the present invention exhibiting the same effect is only 650 g. It is only 1.6% compared to the conventional one

In the above-mentioned embodiment, the effect of the present invention increases as the number of watt increases. In view of the weight, the present invention has a remarkable weight reduction and cost reduction corresponding to 1/10 -1/60.

10: Existing sealing precursor
10a: Front cover of existing bulb 10b: Back cover of existing bulb
11: existing metal block
20: conventional LED module 20a: conventional LED 20b: existing metal PCB
50: Conventional bulb electricity supply
100: sealing precursor 100a: front cover 100b; Rear cover
101: closed space inside the precursor 110: metal block
200: LED module 200a: LED 200b: metal PCB 200c: microhole 300: reflector
301: internal air circulation passage 302: hood 400: circulating fan 400a: rotary motor
400b: rotating fan 500: electric supply part

Claims (9)

A closed precursor in which a closed space is formed so that the inside air is blocked from outside air;
An LED module positioned within the closed space of the sealing precursor;
A circulation fan for diffusing the generated heat of the LED module into the whole of the closed space;
A motor installed inside the closed space connected to the circulation fan;
And an electric supply unit for supplying electric power to the LED module and the motor, wherein the circulation fan is installed in the closed space and the motor is installed in the closed space. A closed precursor in which a closed space is formed so that the inside air is blocked from outside air;
An LED module positioned within the closed space of the sealing precursor;
A circulation fan for diffusing the generated heat of the LED module into the whole of the closed space;
A motor installed outside the closed space connected to the circulation fan;
An electric power supply unit for supplying electric power to the LED module and the motor;
Wherein the circulation fan is installed inside the closed space and the motor is installed outside the closed space.
The method according to claim 1 or 2, wherein the closed precursor is formed by combining a front cover in the light emitting direction and a rear cover on the opposite side in the light emitting direction in forming the closed space, It consists of glass or plastic that can pass light,
Wherein the rear cover is made of one or more of glass, plastic, metal, ceramic, or one or more of which is provided with a circulation fan inside the closed space and a motor installed inside or outside the closed space.
The method according to claim 1 or 2, wherein the total volume of the sealing precursor including the space volume of the sealing precursor is such that a releasable calorific value due to natural contact with the outside air at the entire outer surface of the sealing precursor And a motor is installed inside or outside the closed space. The LED lighting device according to claim 1, wherein the circulation fan is installed in the closed space.
The LED module according to claim 1 or 2, wherein a plurality of micro holes are formed in the LED module so as to completely pass from the rear surface of the metal PCB to the upper surface of the metal PCB, LED lighting device with circulating fan inside the closed space and motor installed inside or outside the closed space
The LED module according to claim 1 or 2, wherein a plurality of micro-pins are formed on the rear surface of the metal PCB so as to allow the inside air to pass through the driving of the circulation fan. LED lighting device installed and equipped with motor inside or outside the closed space
3. The LED module according to claim 1 or 2, wherein a microwave metal mesh is formed on the rear surface of the metal PCB so as to allow the inside air to pass through the driving of the circulation fan, LED lighting device with motor inside or outside the closed space
The air conditioner according to claim 1 or 2, wherein the air inside the closed space of the airtight precursor is air having a humidity of 40% or more. A circulation fan is installed in the closed space and a motor Installed LED lighting device.
The refrigerator of claim 1 or 2, wherein the electric supply unit further comprises an SMPS module adapted to apply an appropriate current and voltage to the LED module and the circulation fan. LED lighting device installed and equipped with motor inside or outside the closed space
KR1020150064620A 2015-05-08 2015-05-08 The LED lighting device which the air circulating fan setted in the inside of the closed space KR20160131686A (en)

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KR1020150064620A KR20160131686A (en) 2015-05-08 2015-05-08 The LED lighting device which the air circulating fan setted in the inside of the closed space

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150064620A KR20160131686A (en) 2015-05-08 2015-05-08 The LED lighting device which the air circulating fan setted in the inside of the closed space

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KR20160131686A true KR20160131686A (en) 2016-11-16

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