KR100899722B1 - LED lighting device - Google Patents

Abstract

Provided is a light emitting diode illumination device.

 The present invention includes a front body having a substrate on which at least one light emitting source is mounted and a reflective layer reflecting light generated when the light emitting source emits light; A rear body having a power supply unit for supplying power to the light emitting source; A cooling block provided between the front body and the rear body to be in contact with the substrate to cool heat generated when the light emitting source emits light; And a cooling fan provided at a fan block connected to the cooling block via at least one heat dissipation rod and rotating when the power is applied.

According to the present invention, it is possible to increase the cooling efficiency by efficiently cooling the high temperature heat generated during the light emission of a high output light emitting diode suitable for broadcasting lighting to the outside, and to improve the convenience of use as it is easy to handle and move. The design becomes possible.

Light Emitting Diode, Lighting, Thermoelectric Element, Cooling, Heat Dissipation

Description

Light Emitting Diode Illumination Device

The present invention relates to a lighting device using a light emitting diode, and more particularly, q can be released to the outside while cooling the high-temperature heat generated during the light emission of a high output light emitting diode suitable for broadcasting lighting to increase the cooling efficiency, handling and movement The present invention relates to a light emitting diode illumination device that can be easily used to improve convenience in use and can be made compact in design.

In general, the light emitting diode (Light Emitting Diode) is smaller than the conventional light source such as fluorescent lamps, incandescent lamps, and has a long lifespan and electrical energy is directly converted into light energy, so the power consumption is low, high energy efficiency and high brightness It has a degree and has a fast response characteristic. Accordingly, various lighting apparatuses using such light emitting diodes as light emitting sources have been developed.

In addition, the lighting device using the light emitting diode as a light emitting source is safe in the future in response to various environmental regulations and climate change conventions, unlike incandescent lamps and fluorescent lamps. There is no obligation to collect electronics and electronics and there is no CO2 emission restriction. Therefore, the importance of the lighting industry is increasing as an eco-friendly future industry.

On the other hand, the broadcast lighting device uses a halogen light or a metal light, and usually has a high output of 75W to 150W to generate a high heat when lighting, thereby causing a lot of problems when taking pictures by the high heat generated during lighting. .

In addition, in the case of halogen or metal lighting, the power consumption is high and the power structure must use an AC power source, so there is a limit in implementing a mobile lighting device.

Recently, various types of broadcasting lighting apparatuses have been developed using light emitting diodes as illumination sources. However, such lighting apparatuses have to adopt high output light emitting diodes having a power consumption of 50 W or more in order to have high luminance and illumination. Since a heat sink is required to emit heat generated and the power consumption is increased, the size of the heat sink must be increased in proportion to the power consumption.

Accordingly, the present invention is to solve the above problems, the object of which is to effectively discharge the high temperature heat generated during the light emission of the high output light emitting diode suitable for broadcast lighting to the outside to increase the cooling efficiency, handling and The present invention provides a light emitting diode lighting device that can be easily moved due to its ease of use and miniaturization.

As a specific means for achieving the above object, the present invention includes a front body having a substrate on which at least one light emitting source is mounted, and a reflective layer reflecting light generated when the light emitting source emits light; A rear body having a power supply unit for supplying power to the light emitting source; A cooling block provided between the front body and the rear body to be in contact with the substrate to cool heat generated when the light emitting source emits light; And a cooling fan provided at a fan block connected to the cooling block through at least one heat dissipation rod, the cooling fan being rotated when the power is applied.

Preferably, the rear body includes a plurality of first through holes formed through the outer surface corresponding to the cooling fan, and a plurality of second through holes formed through the outer surface corresponding to the power supply unit.

Preferably, the power supply unit includes at least one rechargeable battery and an accommodating part in which the rechargeable battery is embedded, and the accommodating part is connected to a rib extending from the rear main body, and the outer casing is spaced apart from the outer casing at a predetermined interval. An inner casing disposed in the casing, and an inner partition wall for dividing and arranging a rechargeable battery included in the inner casing.

Preferably, the cooling block includes a cooling member in contact with the substrate, a thermoelectric element in contact with the cooling member, and a heat dissipation member in which one end of the heat dissipation rod is assembled to the thermoelectric element.

More preferably, the cooling member is inserted into the first casing, the heat dissipating member is inserted into the second casing, and in the direction of narrowing the distance between the cooling member and the heat dissipating member between the first casing and the second casing. The elastic part is provided to provide an elastic force.

More preferably, the substrate has a lower concave-convex surface on the lower surface, and the cooling member has an upper concave-convex surface on the upper surface to be joined with the lower concave-convex surface.

More preferably, the heat dissipation member includes an upper heat dissipation block and a lower heat dissipation block disposed on the second casing and stacked up and down, and each of the upper and lower heat dissipation blocks has an arrangement groove in which the heat dissipation bar is disposed.

Preferably, a control unit is further included between the power supply unit and the light emitting source, and the control unit includes a constant voltage driving circuit, an overvoltage and overcharge protection circuit, and a high temperature prevention circuit.

According to the present invention, between the front body having a substrate on which the light emitting source is mounted and the rear body having the power supply unit, a cooling block for cooling the heat generated when the light emitting source emits light is transferred to the fan block through the cooling block. By having a cooling fan rotated to dissipate heat, a high output light emitting diode is used because the heat of heat transfer can be discharged to the outside while cooling the high temperature heat accompanying the light emitting diode by the Peltier effect of the thermoelectric element. It is possible to realize broadcasting lighting with low power type, and it is possible to improve the convenience of use by equipping the power supply unit for easy handling and movement, and to maintain the light intensity and brightness of the high output light emitting diode as it is possible to miniaturize the design. The product size can be reduced.

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

1 is a longitudinal sectional view showing a light emitting diode lighting apparatus according to a preferred embodiment of the present invention, Figure 2 is a longitudinal sectional view taken along the line 2-2 'of Figure 1, Figure 3 is a preferred embodiment of the present invention 4 is an external view showing a light emitting diode lighting apparatus according to the present invention, and FIG. 4 shows a light emitting diode lighting apparatus according to a preferred embodiment of the present invention, wherein a) is a front view of the front body and b) is a longitudinal cross-sectional view of the rear body. .

Lighting device 100 according to a preferred embodiment of the present invention, as shown in Figures 1 to 4 (a) (b), the front body 110, the rear body 120, the cooling block 130 and cooling Includes a fan 140

The front body 110 includes a substrate 113 on which at least one light emitting source 111 is mounted, and a reflective layer 114 reflecting light generated when the light emitting source 111 emits light forward.

The light emitting source 111 may be provided as a high output light emitting diode having a single chip structure, and the plurality of light emitting sources 111 may be provided in a dot matrix structure on a substrate.

The front body 110 may be provided in a dome shape having an internal curvature of a predetermined size so that the light generated when the light emitting source 111 emits light can be focused and irradiated forward. A reflective layer 114 is provided on the inner surface.

The reflective layer 114 may be provided as a reflector reflecting light generated from a light emitting source, but is not limited thereto. The reflective layer 114 may be formed under a high vacuum using a reflective material made of aluminum, silver, or an alloy containing these metals. Thermal evaporation (Thermal Evaporation), sputtering deposition (Sputtering Deposition) may be provided by any one of the plating method.

In this case, the front body 110 is preferably provided with a transparent transparent glass to protect the light emitting source 111 from the external environment.

The rear body 120 is a structure having an internal space of a predetermined size to include a control unit 125 together with a power supply unit 121 for supplying power to the light emitting source 111.

The rear body 120 includes a plurality of first through holes 128 formed through the outer surface corresponding to the cooling fan 140, and formed through the outer surface corresponding to the power supply 121. Two second through holes (129). Accordingly, the internal air of the rear body 120 is forcibly discharged to the outside through the first through hole 128, while the outside air having a relatively lower temperature than the internal air is the second through hole 129 Through) is introduced into the inner space of the rear body 120 to increase the cooling efficiency while smoothly air circulation.

Here, the first and second through holes 128 and 128 are illustrated and described as being formed through the slit, but are not limited thereto. The first and second through holes 128 and 128 are formed to penetrate through the circular holes or the square holes to discharge the internal air to the outside, and the external air to the inside. Inlet air passage function can be performed.

The power supply unit 121 includes at least one rechargeable battery 122 and an accommodating part 123 in which the rechargeable battery 122 is embedded, and the accommodating part 123 is formed from an inner surface of the rear body 120. An outer casing 123b connected to the extending rib 123a, an inner casing 123c disposed in the outer casing so that an inner surface and an outer surface of the outer casing 123b are spaced at a predetermined interval, and the inner An inner partition 123d for dividing and arranging the rechargeable battery 122 provided in the casing 123c is provided.

Accordingly, the outer casing 123b is spaced apart from the inner casing 123c in which the rechargeable battery 122 is disposed at a predetermined interval so that heat generated in the rear body 120 is transferred to the inner casing 123c or in the rechargeable battery. The generated heat is prevented from being transferred to the outer casing 123b to prevent overheating.

The inner partition 123d is assembled and inserted into the assembly step 123e formed on the inner surface of the inner casing.

Here, the rechargeable battery 122 may be arranged in four columns or two columns in parallel, and may be provided as a lithium ion rechargeable battery having an output voltage of 2.4 V and a charging capacity of 2400 mA.

In addition, the controller 125 is electrically connected between the power supply unit 121 and the light emitting source 111, and the constant voltage driving circuit is provided to the control unit 125 to supply power to the light emitting source 111 at a constant voltage. It is preferable to include an overvoltage and overcharge protection circuit and a high temperature prevention circuit to smoothly charge the rechargeable battery 122.

The cooling block 130 is in contact with the substrate 113 on which the light emitting source 111 is mounted and the front body 110 so as to discharge heat to the outside while cooling the heat generated when the light emitting source 111 is emitted. It is provided between the rear body 120 is a cooling radiating structure.

As shown in FIGS. 5 and 6, the cooling block 130 includes a cooling member 131 that is in contact with one side of the substrate 111, and a thermoelectric element that is in contact with one side of the cooling member 131. 132 and a heat dissipation member 133 in contact with one side surface of the thermoelectric element 132, one end of the heat dissipation rod 135 is assembled to the heat dissipation member 133.

The cooling member 131 is inserted into and disposed in the first casing 136, and the heat dissipation member 133 is inserted into and disposed in the second casing 137 and the flange 136a of the first casing 136. Between the cooling and heat-dissipating members 131 and 133 and the thermoelectric element 132 by providing an elastic force of a predetermined strength in a direction to narrow the gap formed between the cooling and heat-dissipating members 131 and 132 between the flange 137a of the second casing 137. The elastic part 138 which improves the surface contact force between ()) is provided.

Here, the elastic portion 138 is a support rod 138a inserted into the assembly hole formed in the flange 136a of the first casing 136 and the flange 137a of the second casing 137, and the support rod 138a. It may be provided, including, but not limited to, an elastic member 138b inserted into and disposed on one end of the support rod 138a, but is not limited thereto. Elastic member 138b disposed on the support rod 138a. ) May be provided between the nut member 138c and the flange 136a of the first casing 136 or between the flange 138a of the second casing 137 and the head of the support rod 138b.

At least two elastic parts 138 may be provided at equal intervals in the circumferential direction along the flanges of the first and second casings 136 and 137.

Subsequently, as shown in FIG. 7A, the substrate 113 on which the light emitting diode, which is the light emitting source, is mounted, has a lower uneven surface 113a on its lower surface, and is in contact with the lower surface of the substrate 113. The upper surface of the member 131 is provided with an upper concave-convex surface 131a which is joined with the lower concave-convex surface 113a and the upper and lower concave-convex surfaces 113a and 131a are provided on a threaded end surface.

Accordingly, heat exchange between the substrate 113 and the cooling member 131 may be performed in a relatively large area compared to the substrate and the cooling member being interviewed on a flat plate, thereby improving cooling efficiency.

In addition, as shown in FIG. 7B, the light emitting source 111 may be mounted on the substrate 113 disposed in the center region of the cooling member 131, and the thermoelectric element 132 may be disposed on the substrate 113. As shown in FIG. 7C, the heat dissipation member 133 is preferably disposed in a central region, and the thermoelectric element 132 is provided to be substantially the same as or larger than the mounting area of the substrate. desirable.

Here, in the thermoelectric element 132, an upper surface of the upper side of the drawing interviews the substrate 113, and a lower surface of the thermoelectric element 132 of the drawing faces the cooling member 131 to exchange heat with heat generated when the light emitting source emits light. Thus, the light emitting source is cooled through the substrate.

That is, when power is supplied to the thermoelectric element 132, the upper surface of the thermoelectric element contacting the substrate through the cooling member is cooled while the lower surface of the thermoelectric element contacting the heat dissipation member 133 is heated. At the same time as the cooling member in contact with the upper surface of the thermoelectric element is cooled, the substrate 113 in contact with the upper surface of the thermoelectric element is also heat-exchanged and cooled so as to be lowered to a temperature below the room temperature together with the light emitting source 111. It is cooled by releasing heat to the outside.

And, as shown in Figure 7 (d) and 7 (e), the heat dissipation member 133 is disposed in the second casing 137, the upper heat dissipation block 133a and the lower heat dissipation block ( 133b, and the upper and lower heat dissipation blocks 133a and 133b are provided with arrangement grooves 134a and 134b in which the heat dissipation rods 135 are disposed.

Here, one end of the heat dissipation rod 135 is assembled and fixed to the assembly hole formed by the placement grooves when the top and bottom heat dissipation block (133a, 133b) of the top and bottom combination, and the other end of the heat dissipation rod 135 is the fan It is inserted into and fixed to the assembly hole 141a formed through the block 141.

Accordingly, some of the heat transmitted to the heat dissipation member 133 through the lower surface of the thermoelectric element 132 is discharged through the surface of the heat dissipation rod 135 exposed outside in the inner space of the rear body 120, but the rest The heat is transferred to the fan block 141 through the heat dissipation rod 135 is discharged through the outside.

The cooling fan 140 is rotated in one direction when the power is applied to the heat dissipation member 133 and the at least one heat dissipation rod 135 of the cooling block 130 to discharge the internal air in the rear body 120 to the outside It is provided in the fan block 141 connected through.

As shown in Figure 6 and 7 (e), the cooling fan 140 is disposed in the fan arrangement groove 142 of the fan block 141 of the upper part is sealed and opened to the lower, the heat dissipation rod 135 ) Is inserted into and fixed to the assembling hole 141a formed in the horizontal direction.

Here, the cooling fan 140 is preferably provided as a silent fan that can minimize the generation of noise during the rotation drive.

Meanwhile, the cooling member 131, the heat dissipation member 133, the heat dissipation rod 135, and the fan block 141 may be made of a material such as aluminum having excellent thermal conductivity.

When power is applied to the light emitting source 111 of the lighting device 100 having the above-described configuration, the light emitting source emits light to generate light, and heat is generated, and the generated heat is transferred to the cooling block through the substrate. .

In addition, when a direct current voltage is applied to the thermoelectric element 132 provided between the cooling member 131 and the heat dissipation member 133 of the cooling block 130, the cooling member 131 interviewing the substrate 113. ) And a Peltier effect in which heat is transferred from the heat absorbing surface, which is the upper surface of the thermoelectric element, to the heat generating surface, which is the lower surface, which is in contact with the heat dissipation member 133. The endothermic surface, which is the upper surface of, decreases in temperature, and the lower surface, which is the exothermic surface, increases in temperature.

Accordingly, the cooling member 131 in contact with the upper surface of the heat absorbing surface of the thermoelectric element is cooled and the substrate 113 in contact with the light is cooled together with the light emitting source 111 to prevent overheating of the light emitting source. Heat transferred to the lower surface, which is a heat generating surface, is transmitted through the heat dissipation member 133, the heat dissipation rod 135, and the fan block 141 in the direction of arrow A as shown in FIG. 8.

When the cooling fan 140 is rotated and driven by applying power to the cooling fan 140 provided in the fan block 141 connected to the heat dissipation member 133 and the heat dissipation rod 135, the rear The air heated inside the main body 120 is discharged through the first through hole 128 formed in the outer surface of the rear main body 120 in the direction of the arrow B of FIG.

At the same time, the external air having a temperature lower than the internal air due to the negative pressure generated around the fan block when the cooling fan 140 rotates is rotated in the direction of arrow C of FIG. 8. Through the first through-hole 129 formed on the outer surface is introduced into the fan block, heat exchange with the heat dissipation rod to cool them, it is possible to increase the cooling efficiency.

On the other hand, the application of power for cooling by the thermoelectric element 132 may be made at the same time as generating power by applying power to the light emitting source, but is not limited thereto, the cooling block 130 or the substrate 113, It may be selectively made according to the measured temperature value of the temperature sensor (not shown) for measuring the temperature of the light emitting source 111.

In addition, the application of power for rotating the cooling fan 140 may be performed at the same time as applying power to the thermoelectric element 132, but is not limited thereto. The cooling block 130 or the substrate 113 may emit light. It may be selectively made according to the measured temperature value of the temperature sensor (not shown) for measuring the temperature of the circle 111.

While the invention has been shown and described with respect to particular embodiments, it will be understood that various changes and modifications can be made in the art without departing from the spirit or scope of the invention as set forth in the claims below. It will be appreciated that those skilled in the art can easily know.

1 is a longitudinal sectional view showing a light emitting diode lighting apparatus according to a preferred embodiment of the present invention.

FIG. 2 is a longitudinal cross-sectional view taken along the line 2-2 ′ of FIG. 1.

3 is an external view illustrating a light emitting diode lighting apparatus according to a preferred embodiment of the present invention.

4 shows a light emitting diode lighting apparatus according to a preferred embodiment of the present invention,

a) is a front view of the front body,

b) is a longitudinal sectional view of the rear body;

5 is a longitudinal sectional view showing a cooling block and a fan block provided in the LED lighting apparatus according to the preferred embodiment of the present invention.

6 is a longitudinal cross-sectional view taken along the line 6-6 ′ of FIG. 5.

7 is a detailed detailed view of a light emitting diode lighting apparatus according to a preferred embodiment of the present invention.

a) is the interface detail between the substrate and the heat dissipation member,

b) is a longitudinal cross-sectional view taken along the line 7b-7b 'of FIG.

c) is a longitudinal cross-sectional view cut along the line 7c-7c 'of FIG.

d) is a longitudinal cross-sectional view taken along the line 7d-7d 'of FIG.

e) is a longitudinal cross-sectional view cut along the line 7e-7e 'of FIG.

f) is an exploded perspective view of the heat dissipation member.

8 is a schematic diagram showing a heat flow state in the LED lighting apparatus according to a preferred embodiment of the present invention.

   Explanation of symbols on the main parts of the drawings

110: front body 111: light emitting source

113: substrate 114: reflective layer

120: rear body 121: power supply

122: rechargeable battery 123: receiving portion

125 control unit 130 cooling block

131: cooling member 132: thermoelectric element

133; Heat dissipation member 135: heat dissipation rod

136: first casing 137: second casing

140: cooling fan 141: fan block

Claims (8)

A front body including a substrate on which at least one light emitting source is mounted and a reflective layer reflecting light generated when the light emitting source emits light; A rear body having a power supply unit for supplying power to the light emitting source; A cooling block provided between the front body and the rear body to be in contact with the substrate to cool heat generated when the light emitting source emits light; And And a cooling fan provided in the fan block connected to the cooling block through at least one heat dissipation rod to rotate when the power is applied.  The cooling block includes a cooling member in contact with the substrate, a thermoelectric element in contact with the cooling member, and a heat dissipation member in which the one end of the heat dissipation rod is assembled to the thermoelectric element, The heat dissipation member includes an upper heat dissipation block and a lower heat dissipation block disposed on the second casing and stacked up and down, and each of the upper and lower heat dissipation blocks has an arrangement groove in which the heat dissipation bar is disposed. Lighting equipment. The method of claim 1, wherein the rear body has a plurality of first through holes formed in the outer surface corresponding to the cooling fan and a plurality of second through holes formed in the outer surface corresponding to the power supply unit. Light emitting diode illumination device. The battery pack of claim 1, wherein the power supply unit includes at least one rechargeable battery and an accommodating part in which the rechargeable battery is embedded, and the accommodating part is spaced apart from the outer casing connected to the rib extending from the rear main body and at a predetermined distance from the outer casing. And an inner casing disposed in the outer casing, and an inner partition wall for dividing a rechargeable battery provided in the inner casing. delete The method of claim 1, wherein the cooling member is inserted into the first casing, the heat dissipation member is inserted into the second casing, the gap between the cooling member and the heat dissipating member is narrowed between the first casing and the second casing. Light emitting diode illumination device, characterized in that provided with the elastic portion to provide an elastic force in the direction. The light emitting diode lighting apparatus of claim 1, wherein the substrate has a lower uneven surface on a lower surface thereof, and the cooling member has an upper uneven surface on which an upper uneven surface is joined to the lower uneven surface to be interviewed. delete The light emitting diode lighting apparatus of claim 1, further comprising a control unit between the power supply unit and the light emitting source, wherein the control unit includes a constant voltage driving circuit, an overvoltage and overcharge protection circuit, and a high temperature prevention circuit.

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