KR101215779B1 - Replective led light apparatus equipped with fan - Google Patents

Replective led light apparatus equipped with fan Download PDF

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Publication number
KR101215779B1
KR101215779B1 KR1020110046602A KR20110046602A KR101215779B1 KR 101215779 B1 KR101215779 B1 KR 101215779B1 KR 1020110046602 A KR1020110046602 A KR 1020110046602A KR 20110046602 A KR20110046602 A KR 20110046602A KR 101215779 B1 KR101215779 B1 KR 101215779B1
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South Korea
Prior art keywords
heat dissipation
fan
led
hollow
reflective
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KR1020110046602A
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Korean (ko)
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KR20120128764A (en
Inventor
정현종
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정현종
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Priority to KR1020110046602A priority Critical patent/KR101215779B1/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/60Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
    • F21V29/67Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/70Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00Reflectors for light sources
    • F21V7/0008Reflectors for light sources providing for indirect lighting
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S362/00Illumination
    • Y10S362/80Light emitting diode

Abstract

A reflective LED light bulb with a fan is disclosed. Reflective LED bulb having a fan according to an embodiment of the present invention is located below the power supply 100, the first hollow portion 230 perforated in the longitudinal direction therein; A plurality of first heat dissipation fins 220 arranged in a concentric manner around the first hollow part 230; A fan insertion space part 231 positioned on the first hollow part 230 and into which the fan 300 is inserted; A reflection surface 240 positioned at a lower edge of the first hollow part 230 and connecting bottom surfaces of the plurality of first heat dissipation fins 220; An upper heat dissipation means 200 having a first LED contact surface 210 inside the reflective surface 240; A fan 300 inserted into the fan insertion space 231 to forcibly elevate the inflow air from the bottom; A second hollow portion 530 perforated in the longitudinal direction therein; A plurality of second heat dissipation fins 520 arranged concentrically with respect to the second hollow part 530; A lower heat dissipation means 500 having a second LED contact surface 510 disposed outside the upper end of the second hollow part 530; And when the upper heat dissipation means 200 and the lower heat dissipation means 500 is pressed by the first LED contact surface 210 and the second LED contact surface 510, the light emitted by the first LED contact surface 210 The LED light emitting unit 400 is fixed between the first LED contact surface 210 and the second LED contact surface 510 so that the device is not covered, wherein the LED light emitting unit 400 is the reflective surface 240 Located below, the light is irradiated toward the reflective surface 240 as power is applied from the power supply unit 100, and the plurality of first heat dissipation fins 220 and the second heat dissipation fins 520 are erected vertically. It has a plate shape, when the upper heat dissipation means 200 and the lower heat dissipation means 500, the second hollow portion 530 and the first hollow portion 230 is connected in a straight line, the first hollow portion 230 is connected to the outside air through a space between the plurality of first heat dissipation fins 220.

Description

REFLECTIVE LED LIGHT APPARATUS EQUIPPED WITH FAN}

The present invention relates to a lighting apparatus using a light emitting diode (LED) as a light source.

As the demand for energy-efficient light sources increases, research on LED lighting has been conducted, and recently, it has been spread in the form of small LED bulbs for home use.

Such LED lighting has the advantage that it is possible to secure a relatively high illumination at low power, but in order to manufacture a high-brightness LED lighting having a large amount of heat generation, there is a problem in that a heat sink having an excessive size is provided in proportion to the amount of power.

That is, since the size of the light is larger than that of the existing light, a problem arises in that it is not suitable to be installed in place of the existing light. It is due to this limitation that LED lighting is currently being used only to replace household halogen bulbs.

Therefore, when LED lighting is installed to replace high-brightness lighting devices used in factories or external facilities, it is insufficient to dismantle existing lighting because the volume is very large and the weight is very heavy compared to the existing lighting. Work must be involved.

In addition, since a large heat sink made of expensive metal material has to be provided, there is a limit that the remanufacturing cost increases rapidly.

In other words, the size increase due to excessive heat dissipation area, the increase in unit cost, and the drop in luminous efficiency due to the decrease in heat dissipation effect are the limitations that LED lighting must overcome in order to replace existing lighting.

Therefore, there is a need to develop a heat dissipation structure of a new LED light that can minimize the heat dissipation area and improve heat dissipation efficiency, instead of the heat dissipation method by the classical natural convection method.

Applicant's 2009 Patent Application No. 055954 discloses a reflective LED lighting device, and the present invention is an improvement of the 2009 Patent Application No. 05954.

The present invention has been made in order to solve the problems of the prior art as described above, in the reflective LED lighting device to form a hollow portion inside the heat sink to enable heat dissipation by counter-current heat exchange through the inlet air flow, but inside the hollow portion The purpose of the present invention is to provide a reflective LED bulb that maximizes heat dissipation efficiency by increasing a flow rate of inflow air by providing a fan.

Another object of the present invention is to simplify the structure and lower the manufacturing cost by using the bottom surface of the heat sink as a reflecting surface, further comprising a separate reflecting plate which is raised a predetermined height along the periphery of the LED light emitting element extends downward to further increase the diffusion angle. An easy-to-adjust reflective LED bulb is provided.

Reflective LED bulb having a fan according to the present invention to achieve the above object is a power supply unit 100 for supplying power to the fan 300 and LED light emitting unit 400;

Located below the power supply unit 100, the first hollow portion 230 perforated in the longitudinal direction therein; A plurality of first heat dissipation fins 220 arranged in a concentric manner around the first hollow part 230; A fan insertion space part 231 positioned on the first hollow part 230 and into which the fan 300 is inserted; A reflection surface 240 positioned at a lower edge of the first hollow part 230 and connecting bottom surfaces of the plurality of first heat dissipation fins 220; An upper heat dissipation means 200 having a first LED contact surface 210 inside the reflective surface 240;

A fan 300 inserted into the fan insertion space 231 to forcibly elevate the inflow air from the bottom;

A second hollow portion 530 perforated in the longitudinal direction therein; A plurality of second heat dissipation fins 520 arranged concentrically with respect to the second hollow part 530; A lower heat dissipation means 500 having a second LED contact surface 510 disposed outside the upper end of the second hollow part 530; And

When the upper heat dissipation means 200 and the lower heat dissipation means 500 are pressed by the first LED contact surface 210 and the second LED contact surface 510, the light emitting device is driven by the first LED contact surface 210. And an LED light emitting unit 400 fixed between the first LED contact surface 210 and the second LED contact surface 510 so as not to be blocked.

The LED light emitting unit 400 is positioned below the reflective surface 240, and irradiates light toward the reflective surface 240 as power is applied from the power supply unit 100, and the plurality of first heat dissipation fins. The 220 and the second heat dissipation fins 520 have a plate shape standing vertically, and the second hollow part 530 and the first hollow part when the upper heat dissipation means 200 and the lower heat dissipation means 500 are fastened. 230 is linearly connected, and the first hollow part 230 is connected to the outside air through a space between the plurality of first heat dissipation fins 220.

At this time, preferably, the average width of the first heat dissipation fin 220 is longer than the average width of the second heat dissipation fin 520, and the width of the first heat dissipation fin 220 becomes shorter gradually.

According to the present invention, it is possible to solve the problems of volume increase and overweight due to excessive heat dissipation area inevitably generated in the design of high-power LED bulb.

According to the prior art, the bulb size LED lighting was limited to about 7 watts, but according to the present invention, it is possible to implement an LED lighting having a power amount of 24 watts in the same standard.

Therefore, it is possible to provide high-brightness LED lighting while maintaining the size of the existing lighting, and it is possible to simply dismantle the existing lighting and replace the LED lighting in place. That is, it becomes possible to comply with the standard of the existing lighting, thereby improving the installation.

In addition, since the heat sink of excessive size is unnecessary, the manufacturing cost can be greatly reduced.
On the other hand, by adopting a structure in which the upper and lower heat sinks directly contact the LED elements to support them up and down, the structure for supporting the LED elements is simplified, and the heat generated from the LED elements is evenly transferred to the upper and lower parts to provide a heat dissipation effect. There is an effect that can be maximized.

On the other hand, by using the double reflecting structure, the light irradiation characteristics can be made into the surface light source, the diffusion angle can be easily adjusted at the design stage, and the user can easily change the diffusion angle even during the use by replacing the reflecting plate. have.

1 is a reference diagram showing the appearance of a reflective LED bulb having a fan according to the present invention,
FIG. 2 is an exploded perspective view illustrating a coupling relationship between components of a reflective LED bulb having a fan shown in FIG. 1;
3 is a reference diagram for explaining the structure and cross section of the upper heating means,
Figure 4 is a reference diagram illustrating the shape and cross section of the lower heating means,
5 is a cross-sectional view illustrating a structure in which the upper and lower heat generating means and the LED light emitting part are fastened;
6 is a reference diagram for explaining the airflow pattern through the upper, lower heat generating means,
7 is a graph analyzing the flow rate of the air flow through the upper, lower heating means,
Figure 8 is an illustration of a concentrated and diffused light source implemented using a reflective LED bulb with a fan according to the present invention.

Hereinafter, a reflective LED bulb having a fan according to the present invention will be described in detail with reference to a preferred embodiment and the accompanying drawings. In order to clarify the present invention, contents which are not related to the configuration of the present invention will be omitted, and the same reference numerals are used for the same components.

On the other hand, when an element is referred to as being "comprising" another element in the description of the invention or in the claims, it is not interpreted as being limited to only that element, Elements may be further included.

Further, in the detailed description or claims of the present invention, elements designated as "~ means", "~ part", "~ module", and "~ block" mean a unit for processing at least one function or operation.

1 is a perspective view of a reflective LED bulb having a fan according to an embodiment of the present invention, Figures 1 (a), (b) and (c) is a different angle of the reflective LED bulb with a fan, respectively Is shown.

On the other hand, Figure 2 is an exploded perspective view illustrating the coupling relationship between the components of the reflective LED bulb with a fan shown in FIG.

1 and 2, the reflective LED bulb with a fan according to the present invention is the power supply unit 100, the top heat radiating means 200, the fan 300, in order from top to bottom, The LED light emitting unit 400, the lower heat dissipation means 500, the reflecting plate 600 and the transparent housing 700 is made by being fastened to each other and assembled.

The reflective LED bulb having the fan assembled as described above may be installed by being inserted into a light bulb insertion socket installed in a building or other apparatus in a vertical position as shown in FIG. 6, and sometimes in the opposite direction depending on the installation place. It may be installed.

On the other hand, the power is supplied to the power supply unit 100 from the outside as it is inserted into the socket, the power supply unit 100 supplies a predetermined current to the fan 300 and the LED light emitting unit 400.

The bottom surface of the power supply unit 100 is provided with a separate heat sink 110 for discharging heat generated from the power supply unit 100 to the outside, the upper heat generating means 200, the fan 300, the LED light emitting below The unit 400 and the lower heating means 500 is provided.

FIG. 5 is a cross-sectional view illustrating a structure in which the upper heat generating means 200, the fan 300, the LED light emitting unit 400, and the lower heat generating means 500 are fastened, and FIGS. 3 and 4 are respectively upper heating means ( 200 and the shape and cross section of the lower heating means 500 will be described.

As shown in FIG. 3, the upper heat dissipation means 200 has a first hollow portion 230 perforated in the longitudinal direction therein.

Meanwhile, as illustrated in (a) of FIG. 3, a plurality of vertically arranged plate-shaped first heat dissipation fins 220 with respect to the first hollow part 230 are arranged in a concentric manner, and the first heat dissipation fins ( The first hollow portion 230 and the outside air are connected through the spaces between the 220.

To this end, the plurality of first heat dissipation fins 220 are preferably not in contact with each other except for an upper surface and a lower surface.

In this case, a reflective surface 240 is further provided to connect the bottom surfaces of the plurality of first heat dissipation fins 220. The reflective surface 240 is preferably a shape of a curved mirror concave inward as a shape of a cylindrical cylinder cut out. Have

As such, by using the bottom surfaces of the plurality of first heat dissipation fins 220 as the reflecting surfaces 240, a light source based on the reflected light may be realized, but the manufacturing cost may be reduced and the structure may be simplified. In addition, by adjusting the angle of the reflective surface 240 it is possible to adjust the diffusion angle of the light source.

Accordingly, the reflective surface 240 does not necessarily have a shape of a concave mirror, but may be concave as a whole, but may have a shape suitable for a diffusion angle design such as an end portion having a shape of a convex mirror.

Meanwhile, the first LED contact surface 210 is provided inside the donut-shaped reflection surface 240.

On the other hand, the LED light emitting unit 400 is preferably a substrate having a donut shape as shown in Figure 2 and having a plurality of LED elements.

As shown in FIG. 4, the lower heat dissipation means 500 has a second hollow portion 530 perforated in the longitudinal direction therein.

Meanwhile, as illustrated in FIGS. 4A and 4B, a plurality of vertically arranged plate-shaped second heat dissipation fins 520 around the second hollow part 530 are arranged in a concentric circle direction.

On the other hand, the second LED contact surface 510 is provided on the upper surface of the lower heat dissipation means 500.

As shown in FIG. 5, the LED light emitting unit 400 is disposed on the lower heat dissipation means 500 and the second LED contact surface 510, and the first LED contact surface 210 of the upper heat dissipation means 200 is positioned thereon. It can be seen that the LED light emitting unit 400 is fixed. At this time, it is difficult for the light emitting device of the LED light emitting unit 400 to be covered by the first LED contact surface 210.

At this time, the upper heat dissipation means 200 and the lower heat dissipation means 500 do not fasten the LED light emitting unit 400, the first LED contact surface 210, and the second LED contact surface 510 using a separate bolt or other fastening member. In the combination of the first LED contact surface 210 and the second LED contact surface 510 is laminated by pressing the LED light emitting unit 400 can maximize the heat transfer efficiency generated from the LED light emitting unit 400.

According to the prior art, it is common to mount a PCB board on which an LED element is mounted on a heat sink and fasten it using bolts. In this case, the contact surface of the PCB board or the heat sink is laterally pressured to break the uniformity of the contact surface. Occurs. This, of course, leads to a decrease in heat transfer efficiency.

As shown in FIG. 5, the first LED contact surface 210 and the second LED contact surface 510 are laminated by pressing the LED light emitting unit 400 without a separate fastening member.

Meanwhile, a portion where the first LED contact surface 210 and the second LED contact surface 510 contact each other has a structure that may have a wide contact area. As shown in FIG. 5, the areas where the first LED contact surface 210 and the second LED contact surface 510 are in contact with each other may be inclined in an oblique direction, whereby a wider contact area may be secured. Accordingly, the heat transfer from the lower heat dissipation means 500 to the upper heat dissipation means 200 can be made more efficiently.

The upper heat dissipation means 200 further includes a fan insertion space 231 in which the fan 300 is mounted, and the fan insertion space 231 is preferably in the concentric direction as shown in FIG. It is formed inside the plurality of first heat radiation fins 220 arranged in a row.

At this time, the fan insertion space 231 is located on the extension line of the first hollow portion 230 has a volume enough to be inserted into the fan 300.

5, it can be seen that the second hollow part 530, the first hollow part 230, and the fan insertion space part 231 are connected in a straight line.

Therefore, it is expected that the inflow air flow due to the buoyancy effect is introduced through the second hollow portion 230 and is discharged to the outside along the gap formed between the first heat dissipation fins 220 through the first hollow portion 230. Can be.

The fan 300 maximizes the heat dissipation effect by increasing the speed of the inflow airflow as compared with the natural convection state.

On the other hand, when the dust introduced along the air flow along the long-term use is accumulated in the first heat radiation fin 220 and the second heat radiation fin 520, the fan 300, the heat radiation efficiency decreases due to contamination, and the fan 300 It leads to a shortened lifespan.

Therefore, the fan 300 periodically changes the electrode to operate to shake off the dust attached to the fan 300 or the first heat dissipation fin 220 and the second heat dissipation fin 520. For example, you can drive for 5 minutes in the opposite wind direction every 24 hours.

Preferably, the user may be allowed to set a time period for driving in the opposite wind direction.

The wind direction of the fan 300 should be installed so as to be opposite to the direction of gravity, and the wind direction when the fan 300 is installed upside down and vice versa is installed to be reversed.

On the other hand, when the electrode of the fan 300 is changed periodically to operate the wind direction is in the opposite direction attached dust will fall off.

Meanwhile, as shown in FIGS. 1 and 2, the reflecting plate 600 is further provided on the outer side of the lower heat dissipation means 500, and the transparent housing 700 is further provided outward.

The reflector 600 serves to adjust the reflection angle by reflecting again the light irradiated by the LED light emitting unit 400 reflected through the reflecting surface 240 of the bottom surface of the upper heat radiating means 200 as described below.

The transparent housing 700 is preferably made of a transparent member having no light loss upon transmission of light, and is fastened to the lower end of the upper heat radiating means 200 as shown in FIG. 1, so that the LED light emitting unit 400 and the reflector plate ( Protects 600).

The transparent housing 700 has at least a lower end thereof open to allow the inflow of airflow through the second hollow portion 530.

Hereinafter, referring to FIGS. 6 and 7, a process of radiating heat from a reflective LED bulb having a fan according to the present invention having the structure as described above will be described.

6 is a reference diagram schematically illustrating the direction of air flow through the upper and lower heat generating means, and FIG. 7 (a) is a graph showing the flow pattern of the air stream, and FIG. 7 (b) is a graph showing the flow pattern vector of the air stream. .

FIG. 6 assumes the case of being installed by being inserted into a socket in a space recessed above the ceiling of a city factory, with arrows indicating the direction and temperature of the airflow. The higher the red, the higher the temperature.

The upper heat dissipation means 200 and the lower heat dissipation means 500 absorb heat emitted from the LED light emitting unit 400 and are heated to a high temperature.

On the other hand, the air around the lower heat dissipation means 500 is heated by the heat dissipated, and is introduced into the second hollow portion 530 by the buoyancy effect as shown in FIG.

This inflow stream is further heated through the second hollow portion 530 and the first hollow portion 230. As a result, the inflow stream has a higher buoyancy than the surrounding air, and has a higher flow rate.

In particular, the cross-sectional area of the second hollow part 530-that is, the space between the first heat dissipation fins 220-that is, the cross-sectional area of the discharge port through which the inflow air is discharged is designed to be wider than the cross-sectional area of the inlet through which the inflow air flows. 2 hollow portion 530 may increase the inflow rate of the inflow air flowing through the lower end.

In addition, since the second hollow portion 530 and the first hollow portion 230 are connected in a straight line, effective heat dissipation is achieved through the inflow airflow through heat exchange in an opposite flow structure.

Meanwhile, the plurality of first heat dissipation fins 220 of the upper heat dissipation means 200 have a longer horizontal length than the second heat dissipation fins 520 of the lower heat dissipation means 500, as shown in FIG. As you move upwards, you will notice that the horizontal length becomes shorter.

Conventional heating element fins for LED devices are generally long or plate-shaped in one direction, but the first heat dissipation fin 220 of the upper heat dissipation means 200 has a relatively wide horizontal width at the lower end.

As shown in FIG. 6, a relatively low temperature airflow outside the reflective LED bulb having a fan according to the present invention moves upward from the outside of the upper heat radiating means 200 by the buoyancy effect. It flows to a considerable depth in the direction of) and is discharged diagonally upward with the discharge airflow.

The shape of the first heat dissipation fin 220 attracts outside air at a relatively low temperature to a considerable depth, and then discharges it together with the discharge air discharged through the second hollow portion 530 and the first hollow portion 230. Contribute to maximization.

On the other hand, the experiment was performed under predetermined conditions to verify the heat dissipation effect by the fan 300.

[Experimental Example]

The reflective LED bulb having the fan having the above configuration was inserted into the socket for the bulb, and the flow rate of the inflow air was measured.

The experiment was carried out at room temperature, using a known fan 300 having a power consumption of 0.5 watts.

As a result of the experiment, the speed of the inflow air flow through natural convection in a state in which the fan 300 is not installed was recorded about 0.1 m / s to 0.2 m / s based on the bottom of the second hollow part 530.

On the other hand, when the inlet airflow is forcibly raised by driving the fan 300 was able to increase the speed of the airflow to the level of 2m / s.

By increasing the speed of the inflow air by about 10 to 20 times, the heat dissipation effect due to the counter-current heat exchange is greatly improved. It was confirmed to be possible level. That is, it is confirmed that the benefit obtained by increasing the luminous efficiency by heat dissipation is greater than the increase in power consumption due to the input power to the fan 300.

On the other hand, the known fan 300 used in the experiment did not show a significant difference from the average lifespan of a typical LED device as its life is approximately 40,000 hours. Therefore, even if the life of any one of the LED device or the fan is expected to be short, it is expected that there will be no significant effect on shortening the life of the whole product.

In addition, the life of the LED device may be shortened due to excessive heat generation for a long time depending on natural convection, but the LED device may be driven for the life expectancy by forcibly introducing airflow using the fan 300.

That is, it can be seen that the fan 300 is provided in a straight line passing through the first hollow part 230 and the second hollow part 530 to force the inflow of air to effect LED luminous efficiency inventory and lifespan extension. there was.

On the other hand, simulations and experiments on the optimum position of the fan to maximize the heat dissipation effect was performed, with reference to Figure 5 will be described for the optimal position of the fan 300.

As shown in FIG. 5, the fan 300 is positioned on a flow path leading to the second hollow part 530 and the first hollow part 230, but as shown in FIG. 2, below the power supply part 100. Located.

The airflow penetrating through the fan 300 should be discharged diagonally upward to the gap between the first heat dissipation fins 220. 100) It may be too close to the heat dissipation plate 110 of the bottom surface may interfere with the smooth discharge of the discharge air flow it is preferably installed in a position spaced below a predetermined distance from the bottom of the heat dissipation plate 110.

Accordingly, the heat generated by the power supply unit 100 may be discharged to the outside from the heat sink 110 immediately before the discharge airflow is discharged to the outside.

On the other hand, as shown in FIG. 6, as shown in FIG. 6, the temperature gradually increases from the second hollow part 530 to the power supply part 100. Therefore, the buoyancy effect of the inlet airflow can be maximized.

Known semiconductor devices used in the power supply unit 100 have lower heat generation and higher allowable temperatures than conventional LED devices, and thus do not cause problems in maintaining the proper temperature even when the fan 300 is positioned. No.

On the other hand, in the following it will be described a modification related to the diffusion angle of the reflective LED bulb with a fan according to the present invention shown in FIG.

Figure 8 (a) shows an example of implementing a diffused light source using a reflective LED bulb having a fan according to the present invention, Figure 8 (b) is a reflective type with a fan according to the present invention An example of implementing a concentrated light source using an LED bulb is shown.

As shown in FIG. 8, the LED light emitting unit 400 is positioned below the reflective surface 240 and emits light upward as power is applied.

Meanwhile, as shown in FIG. 8, the reflector plate 600 is disposed on the opposite side of the first hollow part 230 and the second hollow part 530 around the LED light emitting part 400. The predetermined length is raised from the height of and extends downward while forming a curved surface.

That is, the reflector 600 includes a raised reflector inner extension 610 facing the LED light emitting unit 400 and a reflector outer extension 620 extending downward while looking outward.

Therefore, the light emitted from the LED light emitting unit 400 is reflected by the reflecting surface 240 and the reflecting plate inner extension 610 are all reflected to the outside. That is, no loss of irradiated light back to the light emitting device occurs.

It can be seen that the reflective LED bulb having the fan shown in FIGS. 8A and 8B has different angles of the reflecting plate 600. In this way, the radiation characteristics such as diffusion type, concentrated type, etc. can be adjusted according to the length or angle of the reflection surface 240, the reflection plate inner extension part 610, and the outer extension part 620.

Compared to using only the reflecting surface 240, it is not only possible to easily change the irradiation angle of the light, but also to allow the user to easily change the irradiation characteristic of the lighting by replacing the reflector 600 even after the lighting is installed. do.

According to the combination of the reflecting surface 240 and the reflecting plate 600, the diffusion angle can be realized up to 30 degrees to 270 degrees, and the reflecting surface 240 is the same, but only 30 degrees to the replacement of the reflecting plate 600. It is possible to change the diffusion angle up to 160 degrees.

As shown in FIG. 8A, the reflecting plate 600 has a structure in which light is diffused in the form of a convex mirror in both the LED light emitting unit 400 direction and the outer direction. On the other hand, the reflector 600 shown in FIG. 8B has a convex mirror in the direction of the LED light emitting unit 400 or a concave mirror in the outer direction, so that the light reflected from the reflective surface 240 is a concave mirror. The concentration is to be investigated within this predetermined range.

On the other hand, when the reflective structure, as the LED light emitting unit 400 is irradiated with light upwards, the dark portion that may occur under the illumination can be removed.

On the other hand, as shown in Figure 2, when provided with a transparent housing 700, even if manufactured using a material having a high light transmittance may be reflected to the inside of some bulbs, by the reflecting plate 600 again Since it is reflected to the outside, the light loss can be minimized.

Conventional LED lighting often uses lenses or semi-transparent scattering films to reduce glare. However, it is possible to prevent light loss caused by lenses or scattering films at the source. By taking the indirect irradiation method by the reflected light instead of the direct irradiation method, glare according to the characteristics of the LED lighting can be eliminated.

In particular, when the irradiation method by the reflected light is selected, the reflective surface can be seen to emit light by emitting a plurality of LED elements can enjoy the effect of a relatively comfortable surface light source, in the present invention, the reflecting plate 240 In addition, since the reflection plate 600 of the side is provided in duplicate, the entire reflection surface is seen as a surface light source that emits light, thereby improving the irradiation characteristic.

According to the prior art, LED device manufacturers and LED bulb manufacturers are usually dualized, and the diffusion angle for the characteristics of the bulb has been entirely dependent on the selection of the LED device manufacturer's product range (lens, flashlight, etc.). Although it has a problem that the design is not easy, it can be solved by the diffusion angle design by the double reflection structure as described above.

Meanwhile, the LED light emitting unit 400 includes LED elements having various wavelength bands, so that the distinction of the wavelength bands is eliminated during the first reflection by the reflecting surface 240 and mixed by the second reflection by the reflecting plate 600. Irradiation characteristics with a given wavelength distribution can be obtained. That is, compared with using an LED device having a narrow wavelength band, it can have characteristics close to sunlight and also helps increase color rendering.

While the present invention has been described with reference to the accompanying drawings and embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. . Accordingly, the scope of the present invention should be determined only by the technical idea of the appended claims, and is not limited to the above embodiments.

Reflective LED bulbs with a fan according to the present invention can be used in the LED lighting art.

100: power supply
110: heat sink
200: upper heat radiation means
210: first LED contact surface 220: first heat dissipation fin
230: first hollow part 231: fan insertion space part
240: reflecting surface
300: fan
400: LED light emitting unit
500: lower heat dissipation means
510: second LED contact surface 520: second heat radiation fin
530: second hollow part
600: reflector
610: reflection plate inner extension portion 620: reflection plate outer extension portion
700: transparent housing

Claims (6)

  1. A power supply unit 100 for supplying power to the fan 300 and the LED light emitting unit 400;
    Located below the power supply unit 100, the first hollow portion 230 perforated in the longitudinal direction therein; A plurality of first heat dissipation fins 220 arranged in a concentric manner around the first hollow part 230; A fan insertion space part 231 positioned on the first hollow part 230 and into which the fan 300 is inserted; A reflection surface 240 positioned at a lower edge of the first hollow part 230 and connecting bottom surfaces of the plurality of first heat dissipation fins 220; An upper heat dissipation means 200 having a first LED contact surface 210 inside the reflective surface 240;
    A fan 300 inserted into the fan insertion space 231 to forcibly elevate the inflow air from the bottom;
    A second hollow portion 530 perforated in the longitudinal direction therein; A plurality of second heat dissipation fins 520 arranged concentrically with respect to the second hollow part 530; A lower heat dissipation means 500 having a second LED contact surface 510 disposed outside the upper end of the second hollow part 530; And
    When the upper heat dissipation means 200 and the lower heat dissipation means 500 are pressed by the first LED contact surface 210 and the second LED contact surface 510, the light emitting device is driven by the first LED contact surface 210. And an LED light emitting unit 400 fixed between the first LED contact surface 210 and the second LED contact surface 510 so as not to be blocked.
    The LED light emitting unit 400 is positioned below the reflective surface 240, and irradiates light toward the reflective surface 240 as power is applied from the power supply unit 100, and the plurality of first heat dissipation fins. The 220 and the second heat dissipation fins 520 have a plate shape standing vertically, and the second hollow part 530 and the first hollow part when the upper heat dissipation means 200 and the lower heat dissipation means 500 are fastened. 230 is connected in a straight line, the first hollow portion 230 is a reflective LED bulb having a fan, characterized in that connected to the outside air through the space between the plurality of first heat dissipation fins (220).
  2. The method of claim 1,
    The reflective surface 240 has a donut-shaped plane, a reflective LED bulb having a fan, characterized in that it has a curved concave upwards.
  3. The method of claim 1,
    The fan 300 is a reflective LED bulb having a fan, characterized in that the electrode is periodically changed to operate.
  4. The method of claim 1,
    The average length of the first heat dissipation fin 220 is longer than the average length of the second heat dissipation fin 520, and the width of the first heat dissipation fin 220 is gradually shortened upward. Reflective LED Bulbs.
  5. The method of claim 1,
    Reflective LED bulb having a fan, characterized in that the space between the plurality of first heat radiation fins 220 than the cross-sectional area of the bottom surface of the second hollow portion (530).
  6. The method of claim 1,
    Reflective type with a fan further comprises a reflecting plate 600 which extends downward from the height of the LED light emitting unit 400 from the height of the LED light emitting unit 400 to form a curved surface downward LED Bulbs.
KR1020110046602A 2011-05-18 2011-05-18 Replective led light apparatus equipped with fan KR101215779B1 (en)

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Application Number Priority Date Filing Date Title
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KR101215779B1 true KR101215779B1 (en) 2013-01-09

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009048994A (en) 2007-08-13 2009-03-05 Lustrous Internatl Technology Ltd Light emitting diode lamp
EP2154419A2 (en) 2008-07-31 2010-02-17 Toshiba Lighting & Technology Corporation Self-ballasted lamp
US20100246166A1 (en) 2009-03-24 2010-09-30 Nien-Hui Hsu Illumination apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009048994A (en) 2007-08-13 2009-03-05 Lustrous Internatl Technology Ltd Light emitting diode lamp
EP2154419A2 (en) 2008-07-31 2010-02-17 Toshiba Lighting & Technology Corporation Self-ballasted lamp
US20100246166A1 (en) 2009-03-24 2010-09-30 Nien-Hui Hsu Illumination apparatus

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