KR20110112743A - Lighting device - Google Patents

Abstract

Embodiments relate to a lighting device.
Lighting device according to the embodiment includes a light emitting portion for emitting light; A radiator including a base part and a cylindrical body part extending perpendicular to the base part, the radiator being disposed above the light emitting part; The outermost side of the radiator is spaced apart by a predetermined distance to surround the radiator, a predetermined space is formed between the outermost side of the radiator, and includes an outer case for communicating the predetermined space and the outside air.

Description

LIGHTING DEVICE

The present invention relates to a lighting device, and more particularly to an LED lighting device.

Light emitting diodes (LEDs) are a type of semiconductor device that converts electrical energy into light. The life of the bulb is not long, and the life is shorter according to the use time, and thus should be checked and replaced periodically, there is a problem in that the operation cost is generated more bulb replacement cost and management costs. Since light emitting diodes have advantages of low power consumption, semi-permanent life, fast response speed, safety, and environmental friendliness compared to conventional light sources such as fluorescent and incandescent lamps, many studies are being conducted to replace conventional light sources with light emitting diodes. BACKGROUND OF THE INVENTION Diodes have tended to replace conventional light bulbs as light sources for lighting devices such as various lamps, liquid crystal displays, electronic signs, and street lamps used indoors and outdoors. However, since LEDs tend to be vulnerable to heat generated during operation, most LED lighting apparatuses use various methods for efficient heat dissipation.

LEDs can emit light with low power and can be operated at low cost.However, since the heat generated from the LED itself is higher than that of the light bulb, the LED is damaged by the heat generated when the control circuit board or the LED is driven. In order to overcome this problem, an efficient LED driving circuit or a heat dissipation structure is being developed. Already, many lighting devices with heat sinks attached to LEDs have been produced, but since the heat generated from the LEDs is transferred to the heat sinks and the heat sinks are exposed to the outside, the outside of the LED lighting devices can only be heated to a considerable heat. There was no inconvenience in replacing, repairing, etc. the LED lighting device. On the other hand, in the case of covering the heat sink with a case, etc. in order to facilitate replacement and repair, the handling may be easy, but the heat dissipation efficiency is low. The present invention has been made to solve the conventional problems as described above, and its object is to provide an LED lighting device having both of these conflicting requirements, namely, ease of handling and excellent heat dissipation characteristics.

Illumination apparatus according to the embodiment, the light emitting portion for emitting light; A radiator including a base part and a cylindrical body part extending perpendicular to the base part, the radiator being disposed above the light emitting part; The outermost side of the radiator is spaced apart by a predetermined distance to surround the radiator, and a predetermined space is formed between the outermost side of the radiator, and includes an outer case for communicating the predetermined space and the outside air.

Lighting device according to another embodiment, the light emitting portion for emitting light; A radiator including a base part and a cylindrical body part extending perpendicular to the base part, the radiator being disposed above the light emitting part; It includes an outer case for forming a predetermined space between the outermost side of the heat sink and a predetermined interval spaced to surround the heat sink, and the outermost side of the heat sink so that the outside air flows, but passing through one or more holes It is characterized in that the top and bottom of the predetermined space is bored so that the outside air flows out through the predetermined space.

The lighting apparatus according to the embodiment can significantly improve heat dissipation efficiency compared to the conventional LED lighting apparatus.

The lighting device according to the embodiment is easy to handle because the external case is not hot when the LED lighting device is replaced, repaired, etc.

1 is a perspective view from below of a lighting device according to an embodiment;
2 is a perspective view from above of the lighting device of FIG. 1;
3 is an exploded perspective view of the lighting apparatus of FIG.
4 is a longitudinal sectional view of the lighting device of FIG. 1;
5 is a perspective view of the radiator 150 of the lighting device of FIG.
6 is a perspective view from above of the heat sink 150 of the lighting apparatus of FIG.
7 is a cross-sectional view taken along the line AA ′ of FIG. 5.
8 is a plan view of a heat sink used for a lighting device that consumes 3.5W of power;
9 is a plan view of a heat sink used in a lighting device that consumes 5 W or 8 W;
10 is a plan view of a heat sink used for a lighting device that consumes 15 W of power;
11 is a perspective view of the light emitting unit 130 and the sealing ring of the lighting device of FIG.
12 is a cross-sectional view illustrating a section taken along line BB ′ of FIG. 11.
13 shows the left side of a longitudinal section of the lighting device without a sealing ring;
FIG. 14 is a view showing the left side of the longitudinal section of the lighting apparatus in which the first fastening member is formed on the bottom surface of the base portion of the heat sink; FIG.
15 shows the left side of a longitudinal section of a lighting device in which a heat sink and a guide member are coupled without a pin or a screw;
FIG. 16 is a perspective view of the guide member 100 of the lighting device of FIG. 1.
17 is a bottom view of the guide member 100 of FIG. 16.
18 is a perspective view of a guide member 100A according to another embodiment of the lighting device of FIG. 1.
19 is a perspective view of a guide member 100B according to another embodiment of the lighting device of FIG. 1.
20 is a modification of the case where the cover portion of the guide member 100 of FIG. 16 is transparent
21 is another modification of the case where the cover portion of the guide member 100 of FIG. 16 is transparent
22 is a further modification of the case where the cover portion of the guide member 100 of FIG. 16 is transparent
FIG. 23 shows another modification in the case where the cover part of the guide member 100 of FIG. 16 is transparent.
24 is a modification of the case where the first heat dissipation hole 102 is not present in the base portion 108 of the guide member 100 of FIG. 16.
FIG. 25 illustrates another modified example in which the base unit 108 of the guide member 100 of FIG. 16 does not have the first heat dissipation hole 102.
FIG. 26 illustrates another modified example in which the first heat dissipation hole 102 is not present in the base portion 108 of the guide member 100 of FIG. 16.
27 is a perspective view of an inner case of the lighting device of FIG.
28 is a longitudinal cross-sectional view of a lower end of a lighting apparatus according to an embodiment in which a support 159 is formed on an upper end of a base 156 of a heat sink 150.
FIG. 29 is a longitudinal cross-sectional view of a lower end of a lighting apparatus according to an exemplary embodiment in which a support 159 having a groove for coupling the power control unit 160 is formed on an upper portion of the base 156 of the heat sink 150.
30 is a plan view of a heat sink 150 used in the lighting apparatus shown in FIG.
31 is a plan view of a modification of the heat sink 150 used in the lighting apparatus shown in FIG.
32 is a plan view of the heat sink 150 used in the lighting apparatus shown in FIG.
33 is a plan view of a modification of the heat sink 150 used in the lighting apparatus shown in FIG.
34 is a perspective view of an outer case 180 of the lighting device of FIG.
35 is a perspective view of a modification of the outer case 180 of the lighting device of FIG.
36 is a perspective view of another modification of the outer case 180 of the lighting apparatus of FIG.
37 is a perspective view of another modification of the outer case 180 of the lighting device of FIG.
38 is a perspective view of another modification of the outer case 180 of the lighting device of FIG.
FIG. 39 is an enlarged cross-sectional view illustrating air flow into the lighting device of FIG. 1; FIG.
40 is an enlarged cross sectional view showing air flow into a lighting device according to another embodiment;
41 is a view showing the area of the air inlet viewed from below the lighting device of FIG.
FIG. 42 is a view showing an area of an air inlet viewed from above of the lighting device of FIG. 1;
43 is a perspective view of a lighting device with enhanced chimney effect
44 is a front view of the heat sink 150 used in the lighting apparatus according to the embodiment of FIG.
45 is a longitudinal cross-sectional view of the heat sink 150 of FIG. 44.
46 is a diagram for explaining the continuous equation of Bernoulli's theorem and incompressible flow.

In the description of the embodiments, the reference for the top or bottom of each layer is assumed to be the side with the light emitting portion 130, the side with the terminal portion 175, unless otherwise specified. 11 and 12, the surface on which the light emitting device 131 is formed will be described as an upper surface. In the drawings, the thickness or size of each layer is exaggerated, omitted, or schematically illustrated for convenience and clarity of description. In addition, the size of each component does not necessarily reflect the actual size.

1 is a perspective view from below of a lighting device 1 according to an embodiment, FIG. 2 is a perspective view from above of a lighting device 1, FIG. 3 is an exploded perspective view of a lighting device 1, and FIG. 4 is an illumination It is a figure which shows the longitudinal cross section of the apparatus 1. As shown in FIG.

1 to 4, the lighting device 1 includes a guide member 100, a lens 110, a sealing ring 120, a light emitting unit 130, a heat sink 140, a heat sink 150, and a power source. The controller 160, an inner case 170, and an outer case 180 are included.

Hereinafter, the lighting device 1 according to the embodiment will be described in detail with reference to each component, and the principle of achieving excellent heat dissipation efficiency in the lighting device 1 according to the embodiment will be described.

<Heat radiator 150>

5 is a perspective view of the heat sink 150 viewed from below, FIG. 6 is a perspective view of the heat sink 150 viewed from above, and FIG. 7 is a cross-sectional view taken along line AA ′ of FIG. 5.

4 to 7, the radiator 150 includes a base part 156 having a through hole 153, a cylindrical body part 157 and a body part 157 extending perpendicular to the base part 156. It includes a heat radiation fin 158 formed on the outer circumferential surface of the.

The radiator 150 accommodates the light emitting unit 130 and the power control unit 160, and serves to release heat generated by the light emitting unit 130 or / and the power control unit 160. The first accommodating groove 151 in which the power control unit 160 is disposed may be formed on the upper surface of the heat sink 150, and the second accommodating groove 152 in which the light emitting unit 130 is disposed may be formed on the lower surface of the heat sink 150. However, the first accommodating groove 151 must be present for accommodating and disposing the power control unit 160, but as shown in the embodiment of FIG. 13, the second accommodating groove 152 may not be formed. ) May be disposed in contact with or in close contact with the bottom surface of the radiator 150. The width and depth of the first and second receiving grooves 151 and 152 may vary depending on the width and the thickness of the power control unit 160 and the light emitting unit 130.

5 and 6, at least one heat dissipation fin 158 may be disposed on the outer circumferential surface of the body 157 with a predetermined space, and each heat dissipation fin 158 may be disposed on or over the heat dissipator 150. When viewed from below, it has a predetermined width, and when viewed from the side of the heat sink 150, it may be formed along the longitudinal direction from the top of the body portion 157 as a plate shape. The heat dissipation fin 158 looks like a shape of a cog wheel when viewed from above or below the heat dissipator 150, or the unevenness is formed at regular intervals along the circumference of the body portion 157 of the heat dissipator 150. . Preferably, like the heat sink 150 shown in FIGS. 5 to 10, the heat radiation fin 158 is a circular arc bent in a direction perpendicular to the longitudinal direction of the heat sink 150 to increase the heat dissipation efficiency by increasing the contact area with air It may be formed in a shape. In addition, the heat sink 150 may be formed in a shape of drawing a sine curve in a direction perpendicular to the longitudinal direction of the heat sink 150. (not shown) The surface area of the heat sink 150 may be due to the heat radiation fins 158. This increase can improve heat dissipation efficiency.

Increasing the number of the radiating fins 158 increases the area in which the radiator 150 is in contact with the air, thereby improving heat dissipation efficiency, while increasing production costs and causing structural weaknesses. On the other hand, since the amount of heat is also changed according to the power capacity of the lighting device, it is necessary to determine the appropriate number of heat radiation fins 158 according to the power capacity.

When viewed from the top, the body 157 will be described with reference to the heat sink 150 having a circular cross section. 8 and 10, the line extending toward the center of the circle of the body portion 157 at the outermost end of the heat dissipation fin 158, and the line extending in this manner from the adjacent heat dissipation fin 158. If l 'is the acute angle between ℓ and ℓ', θ and the outer diameter of the body 157 is ø, for a lighting device that consumes 3.5W of power, θ is 20 °, ø is 35.30mm, and heat radiating fins. When the number of 158 is 18, the spacing between the heat dissipation fins 158 is 3.59 mm, and the thickness of each of the heat dissipation fins 158 in contact with the body portion 157 is 3.59 mm, power of 5 W or 8 W is applied. In the case of a lighting device to be consumed, θ is 17.14285 °, ø is 55.00 mm, the number of heat dissipation fins 158 is 21, the spacing between the heat dissipation fins 158 is 2.77 mm, and each heat dissipation fin 158 is a body portion 157. In the case of a lighting device that consumes 15W of power when the thickness of the contact portion is 3.77mm, θ is 11.235 °, ø is 77.00mm, the number of heat sink fins 158 is 32, and the heat sink fins 158 are used. Yet the spacing is lower the production costs as 3.65mm, the thickness of each part of the radiating fins 158 is in contact with the body portion 157 be 3.90mm was possible to secure the thermal efficiency of the room. However, the numerical value may vary depending on the stiffness, rupture strength, thermal characteristics, workability, and the like of the radiator material 150.

In addition, the heat sink 150 may be formed of a metal or resin material having excellent heat dissipation efficiency. For example, the heat sink 150 may include iron (Fe), aluminum (Al), nickel (Ni), and copper. (Cu), silver (Ag), tin (Sn), magnesium (Mg) and the like may be formed of a material, it may be made of an alloy material containing at least one of them. Carbon steel and stainless steel can also be used. Corrosion-resistant coating or insulation coating can be applied to the surface without affecting the thermal conductivity.

4 and 5, a through hole 153 may be formed on the bottom surface of the heat sink 150, and the light emitting unit 130 may be formed on the second wiring 165 passing through the through hole 153. It may be electrically connected to the power control unit 160 by. Preferably, a protection ring 155 is formed in the through hole 153 to prevent moisture and foreign matter from penetrating between the light emitting unit 130 and the heat sink 150, and the second wire 165 may be a heat sink ( It is possible to prevent problems such as electrical short, EMI, EMS, etc., which may occur by contacting 150, and to improve the withstand voltage characteristics. The protection ring 155 may be formed of a rubber material, a synthetic resin material, a silicon material, or other electrically insulating material.

5 and 6, a first fastening member 154 may be formed on the lower side of the heat sink 150 to firmly couple the guide member 100. The first fastening member 154 may be formed with a pin hole or a hole into which a screw can be inserted, and the guide member 100 may be firmly coupled to the radiator 150 by a screw or a pin.

Referring to FIG. 7, the first width D1 of the lower region of the heat sink 150 to which the guide member 100 is coupled is such that the guide member 100 is easily coupled to the other area of the heat sink 150. It may be narrower than the second width D2.

7 and 14, the first fastening member 154 may be formed on the bottom surface of the base 156 of the heat sink 150.

<Light emitting unit 130 and the sealing ring 120>

FIG. 11 is a perspective view illustrating the light emitting unit 130 and the sealing ring 120 coupled to each other, and FIG. 12 is a cross-sectional view illustrating a cross-sectional view taken along line BB ′ of FIG. 11. In FIG. 11 and FIG. 12, the surface on which the light emitting element 131 is formed is assumed to be an upper surface.

The light emitting unit 130 may include a substrate 132 and one or more light emitting elements 131 mounted on the substrate 132.

The substrate 132 may have a circuit pattern printed on an insulator, and for example, a general printed circuit board (PCB), a metal core PCB, a flexible PCB, a ceramic PCB, or the like may be used. It may include.

In addition, the substrate 132 may be formed of a material that reflects light efficiently, or the surface may be formed of a color that reflects light efficiently, for example, white, silver, or the like.

One or more light emitting devices 131 may be mounted on the substrate 132. Each of the one or more light emitting devices 131 may include at least one light emitting diode (LED). The light emitting diodes may be light emitting diodes of various colors, such as red, green, blue or white, respectively emitting red, green, blue or white light.

In addition, arrangement | positioning of the one or some light emitting element 131 is not limited. However, in the exemplary embodiment, there is a region where the second wiring 165 is attached to the lower surface of the substrate 132, and the light emitting device 131 may not be mounted on the upper surface of the substrate 132 corresponding thereto. For example, in the embodiment illustrated in FIGS. 11 and 12, the second wiring 165 is attached to the center of the lower surface of the substrate 132, and the light emitting device 131 is disposed at the center of the upper surface of the substrate 132. Is not mounted, and the light emitting element 131 is mounted in the circumferential region of the substrate 132 except for the upper center portion.

4 and 12 to 15, the light emitting unit 130 is disposed in the second accommodating groove 152 of the heat sink 150 or the second accommodating groove 152 is not formed in the heat sink 150. If not, the light emitting unit 130 may be firmly fixed to the lower surface of the heat sink 150 by the guide member 100. The sealing ring 120 is coupled to the circumference of the light emitter 130.

The sealing ring 120 prevents moisture or foreign matter from penetrating between the guide member 100 and the light emitting unit 130, and at the same time, a second receiving groove 152 of the outer surface of the light emitting unit 130 and the radiator 150. By preventing the light emitting unit 130 from directly contacting the radiator 150 by separating the inner surface, it is possible to prevent problems such as electrical short, EMI, EMS, etc. of the lighting device 1, and excellent withstand voltage characteristics. It can be done.

The sealing ring 120 may be formed of a rubber material, a synthetic resin material, a silicon material, or other electrically insulating material, and may be coupled to the circumference of the light emitting part 130. Specifically, as shown in FIG. 12, the sealing ring 120 may include a step 121 at an inner lower end, and the step area 121 may have a lateral area and a circumferential area of the upper surface of the light emitting part 130. Can be contacted. In addition, the inner upper end of the sealing ring 120 may be formed to have an inclination 122 to improve light distribution of the light emitting unit 130.

In addition, the sealing ring 120 firmly fixes the light emitting unit 130 and protects the external impact, thereby improving the reliability of the lighting device (1).

14 and 15, when the lens 110 is disposed on the sealing ring 120, the lens 110 is disposed on the light emitting part 130 by the sealing ring 120. h) can be arranged to be spaced apart, thereby making it easier to adjust the light distribution of the lighting device (1).

<Heat sink 140>

Referring to FIG. 12, a heat sink 140 may be attached to an opposite surface of the light emitting unit 130 where the light emitting device 131 is disposed. The heat sink 140 may be attached to the second receiving groove 152 illustrated in FIG. 7. When the second receiving groove 152 is not formed in the heat sink 150, the heat sink 140 may be disposed in close contact with the bottom surface of the heat sink 150. Meanwhile, the light emitter 130 and the heat sink 140 may be integrally formed.

The heat sink 140 may be formed of a thermally conductive silicon pad or a thermal conductive tape having excellent thermal conductivity, and basically serves to transfer the heat generated from the light emitting unit 130 to the heat sink 150. In this case, the heat sink 140 may be made of an insulator material, thereby preventing problems such as electrical short, EMI, EMS, etc., which may occur when the light emitting unit 130 directly contacts the heat sink 150, and may improve the withstand voltage characteristics. Can be.

<Guide member 100>

FIG. 16 is a perspective view of the guide member 100 of the lighting device 1 of FIG. 1, and FIG. 17 is a bottom view of the guide member 100 of FIG. 16.

4, 16, and 17, the guide member 100 includes a base portion 108 having an opening 101 so that the light emitted from the light emitting portion 130 can be seen from the bottom of the lighting device 1. And a cover part 109 formed to extend perpendicular to the base part 108, wherein the base part 108 or the cover part 109 includes at least one first heat dissipation hole 102 and a heat sink 150. It may include a fastening groove 103 for coupling with.

The guide member 100 is shown in the form of a circular ring, but may also have a polygonal or oval ring shape.

The one or more first heat dissipation holes 102 may serve as air inlets through which air may flow into the lighting device 1. However, referring to the embodiments shown in FIGS. 39 and 40, regardless of whether the guide member 100 has the first heat dissipation hole 102, the outer case 180 may follow an arrow in which the outside air is represented by a broken line. After entering the space partitioned by the outermost end of the heat dissipator 150 may exit the outside of the lighting device (1).

On the other hand, the shape of the air inlet structure of the guide member 100 is not limited thereto, and may be variously modified. For example, as illustrated in FIGS. 18 and 19, the guide members 100A and 100B may have at least one heat dissipation groove 105 formed in the cover portion 109 of at least one of the inner and outer cover portions 109. Thus, the air (AIR) may be introduced through this.

On the other hand, as shown in Figure 20, when the guide member 100 is transparent so that the light emitted from the light emitting portion 130 can pass through the base portion 108 of the guide member 100, the guide member 100 May not have an opening 101.

When the second accommodating groove 152 is formed in the heat sink 150, the guide member 100 compresses the circumferential surface of the light emitting part 130 to the second accommodating groove 152 of the heat sink 150. 39, the light emitting unit 130 is fixed while surrounding the outside of the lower circumferential surface of the heat dissipation fin 158, or as shown in FIG. 14, the base 156 of the heat dissipator 150. Fix it to

Alternatively, when the second accommodating groove 152 is not formed in the heat dissipator 150, the guide member 100 presses the light emitting unit 130 against the base 156 of the heat dissipator 150, and closely adheres thereto. As shown in FIG. 40, the light emitting unit 130 is fixed while surrounding the outside of the lower circumferential surface of the heat dissipation fin 158, or as shown in FIG. 13, to the base unit 156 of the heat dissipating member 150. .

At least one of the lens 110 and the sealing ring 120 may be included between the guide member 100 and the light emitting unit 130. Of course, as the guide member 100 illustrated in FIGS. 20 to 23, when the guide member 100 is transparent, the base portion 108 of the guide member 100 may serve as the lens 110. The lens 110 may not be necessary, and referring to FIG. 13, the sealing ring 120 may not be included between the guide member 100 and the light emitting unit 130. In this embodiment, the guide member 100 is preferably made of an insulator material. When the guide member 100 is made of an insulator material, the outer surface of the light emitting unit 130 may be prevented from directly contacting the radiator 150 by the guide member 100 itself without the sealing ring 120. In addition, problems such as electrical short, EMI, EMS, etc. of the lighting device 1 can be prevented, and excellent withstand voltage characteristics can be achieved.

 The guide member 100 should compress the light emitting unit 130 to the second receiving groove 152 or to contact the lower end of the base portion 156 of the radiator 150 so that the width of the opening 101 is emitted. It is desirable to be smaller than the width of the portion 130. In this case, the base unit 108 may apply sufficient pressure to the peripheral regions of the lens 110, the sealing ring 120, and the light emitting unit 130, and the lens 110, the sealing ring 120, and the light emitting unit 130. ) Can be firmly fixed to the heat sink 150, the reliability of the lighting device (1) can be improved.

The guide member 100 may be coupled to the heat sink 150 through the fastening groove 103. For example, as shown in FIGS. 4 and 14, after the hole of the first fastening member 154 of the heat sink 150 and the fastening groove 103 of the guide member 100 are opposed to each other, the first fastening member The guide member 100 and the heat sink 150 may be coupled by inserting a screw or a pin into the hole and the fastening groove 103 of the 154.

15, 21, 23, 24, and 26, instead of the fastening groove 103, a thread is formed on the outer circumferential surface of the second receiving groove 152 of the heat sink 150, and the guide member 100 is formed. Threads are also formed on the inner circumferential surface of the cover portion 109 of the radiator 150 and the guide member 100 may be fastened without a pin or a screw.

<Lens 110>

4, 14, and 15, the lens 110 is disposed under the light emitter 130 to adjust light distribution of light emitted from the light emitter 130.

The lens 110 may have various shapes. For example, the lens 110 may include at least one of a parabolic lens, a Fresnel lens, a convex lens, or a concave lens.

The lens 110 may be disposed below the light emitter 130 to be spaced apart from the first distance h, and the first distance h may be greater than 0 mm and less than or equal to 50 mm according to the design of the lighting device 1.

The first distance h may be maintained by the sealing ring 120 disposed between the light emitter 130 and the lens 110. Alternatively, by forming a separate support portion for supporting the lens 110 in the second receiving groove 152 of the heat sink 150, between the light emitting portion 130 and the lens 110 without the sealing ring 120. The first distance h may be maintained at.

In addition, the lens 110 may be fixed by the guide member 100. 4 and 14 to 17, the base portion 108 of the guide member 100 contacts the lens 110, and the lens 110 and the base portion 108 of the guide member 100 are contacted with each other. The light emitting unit 130 is fixed to the second accommodating groove 152 of the heat dissipator 150, or when the second accommodating groove is not formed, the base portion 108 of the guide member 100 is the lens 110. ) And the light emitting unit 130 are compressed to be fixed to the base unit 156 of the radiator 150.

The lens 110 may be formed of a material such as glass, polymethylmethacrylate (PMMA), or polycarbornate (PC). In addition, according to the design of the lighting apparatus 1, the lens 110 is formed to include a phosphor, or a photo luminescent film (PLF: Photo Luminescent Film) containing a phosphor on the entrance or exit surface of the lens 110 is It may be attached. The light emitted from the light emitting unit 130 by the phosphor changes in wavelength and is emitted.

20 to 23, when the guide member 100 is made of a transparent material, the base portion 108 of the guide member 100 may serve as the lens 110. The description of 110 is similarly applied to the base portion 108 of the guide member 100.

<Inner case 170>

FIG. 27 is a perspective view of the inner case 170 of the lighting device 1 of FIG. 1.

4 and 27, the inner case 170 extends from one side of the terminal portion 175 and the terminal portion 175 and has a cylindrical inner body portion 174 and a terminal portion inserted into the heat sink 150. It may include a first guide portion 172 formed in a vertical direction on the outer peripheral surface of the cylindrical inner body portion 174 adjacent to the 175.

The inner case 170 may be formed of a material having excellent insulation and durability. For example, the inner case 170 may be formed of a synthetic resin material.

The inner body portion 174 is formed in the lower region of the inner case 170, the inner body portion 174 is inserted into the first receiving groove 151 of the heat sink 150, the power control unit 160 and the heat sink. Since it is arrange | positioned between 150, the contact between them can be prevented, the problem of electrical short, EMI, EMS, etc. can be prevented, and the withstand voltage characteristic of the lighting apparatus 1 can be made excellent.

The terminal unit 175 formed in the upper region of the inner case 170 may be connected to an external power source, for example, in a socket manner. That is, the terminal portion 175 may include a first electrode 177 at a vertex, a second electrode 178 at a side surface, and an insulating member 179 positioned between the first electrode 177 and the second electrode 178. The first and second electrodes 177 and 178 may be powered by an external power source. However, the shape of the terminal unit 175 may be variously modified according to the design of the lighting device (1).

The first guide part 172 is formed at the interface between the inner body part 174 and the terminal part 175 and has a diameter larger than that of the first accommodating groove 151 of the heat dissipation member 150. Only the inner body portion 174 of the 170 may be accommodated in the first receiving groove 151.

The first guide part 172 may have one or more first coupling holes 173, and screws or pins are inserted into the one or more first coupling holes 173, such that the inner case 170 and the outer case 180 are disposed in the first guide part 172. Can be combined.

In addition, a plurality of second heat dissipation holes 176 are formed in the inner case 170, thereby improving heat dissipation efficiency inside the inner case 170.

<Power control unit 160>

3, 4 and 7, the power control unit 160 is located in the first accommodating groove 151 of the heat sink 150, and a through hole drilled in the base 156 of the heat sink 150. The second wire 165 passing through 153 may be in electrical communication with the light emitting unit 130 and may be driven by receiving power.

The power control unit 160 may include a support substrate 161 and a plurality of components 162 mounted on the support substrate 161, and the plurality of components 162 may be provided, for example, from an external power source. A DC converter for converting AC power into DC power, a driving chip for controlling the driving of the light emitting unit 130, an electrostatic discharge (ESD) protection element for protecting the light emitting unit 130, and the like.

The power control unit 160 may be electrically connected to the terminal unit 175 and the light emitting unit 130 of the inner case 170 by the first wiring 164 and the second wiring 165, respectively. In detail, the first wire 164 is connected to the first electrode 177 and the second electrode 178 of the terminal unit 175 to receive power from an external power source. Of course, instead of the first wiring 164, a power connection terminal may be formed on the support substrate 161 to be directly connected to the first electrode 177 and the second electrode 178. The second wiring 165 passes through the through hole 153 of the heat sink 150 to electrically connect the power control unit 160 and the light emitting unit 130 to each other. Meanwhile, the light emitting device 131, the substrate 132, and the power control unit 160 may be modularized into one to form the light emitting unit 130. In this case, the power control unit 160 may be disposed below the heat sink 150. It can also be located. At this time, the second wiring 165 is not necessary, and only the power connection terminal on the first wiring 164 or the supporting substrate 161 is sufficient.

Although the support substrate 161 is disposed in the horizontal direction in the inner body 174 of the inner case 170, the power control unit 160 may drive the light emitting unit 130. However, referring to FIGS. 27 to 29, the support substrate 161 may be disposed in a vertical direction in order to smooth air flow in the inner case 170. When the support substrate 161 is disposed in the vertical direction, air flow may occur due to convection in the up and down direction inside the inner case 170, and thus, when the support substrate 161 is disposed in the horizontal direction, The heat dissipation efficiency may be improved, and in particular, may help improve the heat dissipation efficiency of the power control unit 160.

However, even if the support substrate 161 is not necessarily disposed in the vertical direction to the inner case 170, if the air can flow in the up and down direction of the heat sink 150 in the inner body portion 174, the support substrate 161 ) Is equivalent to placing it vertically. Therefore, the support substrate 161 may be arranged in a state inclined to one side in the vertical direction.

If the air flows upward in the inner body 174 by the support substrate 161, the heat dissipation efficiency of the power control unit 160 may still be increased. For example, if there is a through hole in the support substrate 161, even if the support substrate 161 is disposed in the horizontal direction with the base portion 156 of the heat sink 150, the inner substrate 174 passes through the support substrate 161. ) Inside, air can flow in up and down direction. Alternatively, the support substrate 161 is disposed in the horizontal direction, but the shape of the support substrate 161 is different from the horizontal cross-sectional shape of the body portion 174, or the diameter of the support substrate 161 is the same as that of the body portion ( If smaller than the inner diameter of 174, the air may flow in the up and down direction inside the inner body portion 174. As a result, if the inside of the body 174 is not shielded from above to below or below, air may flow in the inside body 174, so that the heat dissipation efficiency of the lighting device 1 may be improved. It is helpful to improve the heat radiation efficiency of the 160.

When the support substrate 161 is disposed upright in the inner case 170 in a vertical direction, or is disposed to be inclined slightly from the vertical, when the lighting device 1 is used for a long time, the power control unit (160) may be caused due to its own load of the power control unit 160. The position of the 160 may be moved downward so that the second wire 165 may be damaged by being pressed by the support substrate 161. The diameter of the through hole 153 formed at the lower end of the heat sink 150 may be increased. In the narrow case, the second wiring 165 is pressed by the support substrate 161 in the process of assembling the lighting device 1, and is sandwiched between the support substrate 161 and the base portion 156 of the heat sink 150. Damage can occur.

In the embodiment shown in FIG. 28, as shown in the drawing, the support part 159 is formed around the through hole 153 in the base part 156 of the heat sink 150, so that the support part 159 is supported by the support substrate 161. And damage to the second wiring 165 can be prevented. Referring to FIG. 30, the support part 159 may be formed in a cylindrical shape surrounding the through hole 153 and protruding from the upper part of the base part 156. Referring to FIG. 31, an upper surface of the base part 156 is provided. It may be formed in the shape of a rod lying on the. In addition, as long as it is a shape capable of separating the base portion 156 and the support substrate 161 of the radiator 150 may be formed in any shape. In the embodiment illustrated in FIG. 30, the diameter of the through hole 153 may be kept narrow as in the embodiment illustrated in FIG. 4 to reduce heat transmitted from the light emitting unit 130 to the power control unit 160. The support 159 may have a diameter larger than that of the through hole 153 to prevent the second wire 165 from being pressed and damaged by the support substrate 161. In the embodiment illustrated in FIG. 31, the support 159 may be disposed to be spaced apart from the through hole 153 by a predetermined distance, thereby providing an effect similar to that of the embodiment of FIG. 30.

As shown in the embodiments of FIGS. 28, 30, and 31, the support part 159 is disposed on the base part 156 with the support part 159 spaced apart from the diameter of the through hole 153 by the support part 159. When the lighting device 1 fails as compared with the upper portion of the base 156 in accordance with the diameter of the through hole 153, in particular, when the light emitting unit 130 and the second wiring 165 have failed. Additional effects can be seen to improve the workability in working to eliminate the fault.

On the other hand, if the groove for coupling the power control unit 160 is dug in the support unit 159 as shown in the embodiment shown in Figures 29, 32 and 33, the support substrate 161 is fitted in the groove, the power control unit 160 It may be prevented from moving in the first receiving groove 151 and the support substrate 161 may be fixed. In addition, in order to further strengthen the coupling of the power control unit 160 coupling groove and the support substrate 161, or to protect the power control unit 160 from external shock, and to reduce the heat conducted directly from the heat sink 150. , A sealing member made of rubber or synthetic resin may be interposed between the groove for coupling the power control unit 160 and the support substrate 161. Through this, the reliability of the lighting device 1 can be further improved.

<Outer case 180>

34 to 38 are perspective views of the outer case 180 viewed from above. As shown in FIG. 4, the outer case 180 is coupled to the inner case 170 to accommodate the radiator 150, the light emitting unit 130, the power control unit 160, and the like. Appearance can be achieved. The outer case 180 may be formed of a material having excellent insulation and durability, and for example, may be formed of a synthetic resin material. 3 and 34 to 38, the outer case 180 is illustrated as having a circular cross section, but may be designed to have a cross section of a polygon, an ellipse, or the like. Since the outer case 180 surrounds the radiator 150, it is possible to prevent an image accident and an electric shock accident due to heat generated during driving during repair or replacement of the lighting apparatus 1.

4, 27, and 34, the outer case 180 may be disposed on the outer wall portion 181 and the first guide portion 172 surrounding the radiator 150 at a predetermined distance from the radiator 150. It may include a ring-shaped second guide portion 187 and at least one protrusion 188 connecting the outer wall portion 181 and the second guide portion 187 in direct contact.

At this time, the outer case 180 surrounds the heat dissipation member 150 at predetermined intervals, and as shown in FIGS. 13 to 15, the heat dissipation fins are formed on the outer circumferential surface of the body 157 of the heat dissipation member 150. 158 is formed, surround the heat sink 150 at a predetermined distance from the iron ((a)) of the heat sink fins indicated by the dotted lines among the yaw ((b)) and the iron ((a)) of the heat sink. do. The outer case 180 has one or more ventilation holes 182 which are spaces between the outer wall 181 and the second guide part 187 so that air can flow between the inside and the outside of the lighting device 1, This can improve the heat dissipation efficiency of the lighting device 1 by smoothing the air flow in the lighting device 1.

As illustrated in FIG. 34, one or more ventilation holes 182 may be drilled in the circumferential region of the upper surface of the outer case 180, and both outermost and innermost sides of the ventilation holes 182 may have an arc shape. However, in addition, it may be in the shape of a circle, oval, polygon, and the like. Alternatively, the ventilation hole 182 may be formed at an upper end of the outer wall portion 181.

34 and 35, the second coupling groove 183 for fastening the outer case 180 and the inner case 170 may be formed on the second guide portion 187 or one or more protrusions 188. Can be.

Referring to FIG. 37, the outer case 180 has no second guide portion 187, and has an outer wall portion 181, an outer wall portion 181, and a first guide portion 172 surrounding the radiator 150. It may include at least one protrusion 188 for connecting. The protrusion 188 may have a second coupling groove 183 for coupling with the first guide portion 172 illustrated in FIG. 27.

At this time, the outer case 180 surrounds the heat dissipation member 150 at predetermined intervals, and as shown in FIGS. 13 to 15, the heat dissipation fins are formed on the outer circumferential surface of the body 157 of the heat dissipation member 150. 158 is formed, surround the heat sink 150 at a predetermined distance from the iron ((a)) of the heat sink fins indicated by the dotted lines among the yaw ((b)) and the iron ((a)) of the heat sink. do.

2, 27, and 34, in the embodiment, the outer case 180 is covered with the inner case 170 in the direction of the terminal portion 175 of the inner case 170, and the screw is inserted into the second coupling groove 183. Alternatively, as the pin is inserted, the second case 187 may be interposed between the one or more protrusions 188 and the first guide 172, and thus the outer case 180 and the inner case 170 may be coupled to each other. have.

Alternatively, the inner body 174 of the inner case 170 may be inserted through the opening of the outer case 180 in an upward direction of the outer case 180, and the first coupling groove 173 and the second coupling groove 183 may be inserted therein. The outer case 180 and the inner case 170 may be coupled to each other by inserting a screw or a pin into the first coupling groove 173 while opposing ().

Referring to FIGS. 27 and 37, unlike the above, since the second case 187 is not provided in the outer case 180, the one or more protrusions 188 and the first guide part 172 are in direct contact with each other. The outer case 180 and the inner case 170 may be coupled to each other by being fastened.

2, 4, 6, and 7, a screw hole or a pin hole is drilled in the upper surface of the body portion 157 of the heat sink 150, and the screw hole or the pin hole, the first coupling groove 173, and The outer case 180, the inner case 170, and the heat sink 150 may be coupled by inserting a screw or a pin while facing the second coupling groove 183.

However, as shown in FIG. 4, the outer case 180, the inner case 170, and the heat sink 150 are not necessarily combined at one time. For example, after the inner case 170 and the heat sink 150 are first coupled using screws or pins, the inner case 170 and the outer case 180 may be coupled using separate screws or pins. Alternatively, the outer case 180 and the heat sink 150 may be first coupled using screws or pins, and then the outer case 180 and the inner case 170 may be coupled using separate screws or pins.

Screw holes or pin holes in the upper surface of the body portion 157 of the heat dissipator 150, screws or pins fitted into the first coupling groove 173 and the second coupling groove 183 does not necessarily have to be a separate member. The fin may be integrally formed on the upper surface of the body 157 of the heat sink 150, the fin is integrally formed on the first guide part 172, or the fin is integrally formed on the second guide part 187. In this case, the radiator 150, the inner case 170, the outer case 180 is coupled in an interference fit manner.

In addition, a screw is integrally formed on the upper surface of the body portion 157 of the heat dissipator 150 so that the first coupling groove 173 and the second coupling groove 183 are opposed to the screw, and the inner case 170 is disposed. ), The outer case 180 may be pushed in the upper surface direction of the heat sink 150 to be in close contact with each other, and then the nut may be fastened to a screw to couple the heat sink 150, the case 170, and the outer case 180 to each other. .

In the lighting device 1, in particular, the LED case, the outer case 180 may generally reduce heat dissipation efficiency. 13 to 15, however, when the radiator 150, the inner case 170, and the outer case 180 are coupled to each other, the heat dissipation efficiency may be sufficiently increased through the chimney effect. By minimizing the contact area with the outer case 180, the heat transferred from the heat sink 150 to the outer case 180 can be minimized. The principle of excellent heat dissipation effect through the chimney effect will be described in detail in the following table of contents.

As a result, even when the lighting device 1 is driven, it is easy to handle because the outer case 180 mainly held by the hand when the lighting device 1 is repaired or replaced can be kept at a temperature below which the human body feels hot. . Existing lighting devices have to take a reduction in heat dissipation efficiency in order to ensure ease of handling, or to reduce the ease of handling in order to secure high heat dissipation efficiency. Therefore, the embodiment illustrated in FIGS. 13 to 15 is different from the existing lighting apparatus in that both high heat dissipation efficiency and ease of handling are secured.

34, 35, and 37, a side of the outer case 180 has a marking groove 185 for facilitating the handling of one or more holes 184 and the lighting device 1 to improve heat dissipation efficiency. At least one of them may be formed, and the shape of the one or more holes 184 and the marking groove 185 may take various shapes in addition to the shape shown in the embodiment. 36 and 38, one or more holes 184 and marking grooves 185 may not be formed.

<Description of Excellent Heat Dissipation Effect>

Several embodiments presented up to now have a significantly better heat dissipation effect than conventional LED lighting devices, and this effect is achieved through the chimney effect. The chimney effect refers to the flow of smoke-air through the vertical space of a building due to the difference in density, that is, the buoyancy difference, depending on the temperature difference between the inside and outside of the building.

3, 13 to 15, and 39 to 42, the principle will be described. When the LED lighting device is driven, heat generated due to the operation of the light emitting unit 130 is directly transmitted to the heat sink 150 or through the heat sink 140 interposed between the heat sink 150 and the light emitting unit 130. The heat is transmitted to the heat sink 150, and heat is transferred from the heat sink 150 to the air located between the space formed between the heat sink 150 and the outer case 180 so that the air is heated. Since the heated air is less dense than the unheated external air, the buoyancy difference occurs and rises upward. The heated and risen air passes through an open space defined by S2 in FIG. 42, which is defined by the top outer surface of the body portion 157 of the heat sink 150 and the top of the outer case 180 and in fluid communication with the outside air. Exit.

In the present embodiment, when the first heat dissipation hole 102 is formed in the guide member 100, the heat dissipation hole serves as a passage for allowing external air to flow into the lighting device. If the first heat dissipation hole 102 is not formed in the guide member 100, as in the embodiment illustrated in FIGS. 13 to 15, the lower end of the outer case 180 and the body of the heat dissipation member 150 are provided. A passage through which air may be introduced may be formed between the lower ends of the outer circumferential surface of the portion 157. That is, even if the heated air rises inside the lighting device 1 and flows out, the new air introduced from the outside replaces the previously raised air, so that the new air capable of dissipating the radiator 150 is the lighting device. (1) to be continuously introduced into (1). Since the new external air continuously flows into the lighting device 1 and exits to cool the radiator 150, the heat dissipation efficiency may be remarkably improved as compared to the conventional LED lighting device.

39 and 40, the heat dissipation fin 158 is spaced apart from the outer case 180, and through this arrangement, the effect of reducing heat transferred from the heat sink 150 to the outer case 180 may be achieved. Can be.

43 to 45 show an embodiment in which the width of the outer case 180 of the lighting apparatus becomes narrower from the lower end of the outer case 180 toward the upper end. The cross section of the heat dissipation member 150 shown in FIG. 45 has a trapezoidal shape so as to be parallel to the outer case 180, and the side end of the heat dissipation fin 158 shown in FIG. 44 is also formed to be parallel to the outer case 180. It is. In this embodiment, the flow of air passing through S1 and S2 sequentially shown in FIGS. 41 and 42 is more smoothly, and thus the heat dissipation efficiency can be further improved.

Referring to FIG. 46, the heat radiation efficiency improvement will be described based on the Bernoulli's theorem and the continuous equation of incompressible flow.

Bernoulli's theorem is shown in Equation 1 below.

In Equation 1, P is pressure, ρ is density, υ is velocity, g is gravitational acceleration, h is height, and based on FIG. 46, subscript 1 is down and subscript 2 is up. Indicates.

In Equation 1, P is pressure, ρ is density, υ is velocity, g is gravitational acceleration, h is height, and based on FIG. 46, subscript 1 is down and subscript 2 is up. Indicates.

The continuous equation of incompressible flow is shown in Equation 2 below.

In Equation 2, A is the cross-sectional area, ν is the speed, and based on FIG. 46, the subscript 1 represents the lower side and the subscript 2 represents the upper side.

 In <Equation 2>, the cross-sectional area (S1) at the bottom through which the fluid passes is larger than the cross-sectional area (S2) at the top (S1> S2), so that the flow velocity at the top is faster than the bottom (V2> V1). In summary, Equation 3 is shown below.

Since the height of the top of the surface is higher than the bottom, the right term in Equation 3 is positive. Eventually, the pressure at the bottom becomes higher than the pressure at the top (P1> P2), which means that the greater the difference in height between the top and the bottom, the greater the cross-sectional area of the bottom through which the fluid passes, the larger the cross-sectional area of the top, and Higher pressure means more smooth flow.

Referring to FIGS. 41 and 42, a cross-sectional area of a surface obtained by cutting the space partitioned by the lower end of the heat sink 150 and the outer case 180 in a direction perpendicular to the longitudinal direction of the heat sink 150 is shown. S1, when the cross-sectional area of the surface cut in the direction perpendicular to the longitudinal direction of the heat sink 150 is defined by the upper space of the heat sink 150 and the outer case 180, the cross-sectional area is eventually changed to S2. The pressure at the air inlet having S1 is higher than the pressure at the air outlet having the cross-sectional area of S2, further facilitating the flow when the air flow due to the chimney effect occurs.

Features, structures, effects, and the like described in the above embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, and the like illustrated in each embodiment may be combined or modified with respect to other embodiments by those skilled in the art to which the embodiments belong. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.

In addition, the above description has been made with reference to the embodiments, which are merely examples and are not intended to limit the present invention, and those skilled in the art to which the present invention pertains do not depart from the essential characteristics of the present embodiments. It will be appreciated that various modifications and applications are possible. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

1: lighting device
100: guide member
120: first protection ring
130: light emitting unit
140: heat sink
150: radiator
160: power control unit
170: inner case
180: outer case

Claims (8)

A light emitting unit for emitting light;
A radiator including a base portion and a cylindrical body portion extending perpendicular to the base portion, the radiator disposed on an upper side of the light emitting portion; And
An outer case which is spaced apart from the outermost side of the heat sink by a predetermined distance and surrounds the heat sink, and a predetermined space is formed between the outermost side of the heat sink and the predetermined space communicates with the outside air.
Lighting device comprising a.
The method of claim 1,
The radiator is a lighting device characterized in that at least one heat radiation fin is formed on the outer peripheral surface of the body portion
The method of claim 1,
Illumination apparatus characterized in that the cross-sectional area of the predetermined space when the outer case is cut along the direction perpendicular to the longitudinal direction of the body portion becomes narrower toward the opposite direction of the light emitting portion
The method of claim 2,
The heat dissipation fins are disposed at predetermined intervals along the outer circumferential surface of the body portion, and are irregular shapes formed in the longitudinal direction of the body portion, and have an arc shape bent in a direction perpendicular to the longitudinal direction of the body portion.

A light emitting unit for emitting light;
A radiator including a base portion and a cylindrical body portion extending perpendicular to the base portion, the radiator disposed on an upper side of the light emitting portion; And
An outer case configured to form a predetermined space between the outermost side of the radiator and the outermost side of the radiator so as to surround the radiator, and to form a predetermined space between the outermost side of the radiator so that external air flows, the at least one And an upper and a lower portion of the predetermined space so that the outside air passing through the hole flows out through the predetermined space.
6. The method of claim 5,
The radiator is a lighting device, characterized in that at least one heat radiation fin is formed on the outer peripheral surface of the body portion
6. The method of claim 5,
Illumination apparatus characterized in that the cross-sectional area of the predetermined space when the outer case is cut along the direction perpendicular to the longitudinal direction of the body portion becomes narrower toward the opposite direction of the light emitting portion
The method of claim 6,
The heat dissipation fins are disposed at predetermined intervals along the outer circumferential surface of the body portion, and are irregular shapes formed in the longitudinal direction of the body portion, and have an arc shape bent in a direction perpendicular to the longitudinal direction of the body portion.

Images