KR101446122B1 - Improved hit sink and led lighting device using the same - Google Patents

Abstract

The present invention provides an improved heat sink having improved heat dissipation efficiency by increasing the inflow of air according to a pressure difference during air convection by forming the outer path and the inner path length of the heat sink differently, and an LED lighting apparatus using the same . To this end, the present invention is an improved heat sink comprising: a base; And a plurality of radiating fins extending from the base by a predetermined length. The radiating fins have different lengths from each other. The radiating fins have a length of an outer side arranged in an outward direction and a length of an inner side arranged in an inward direction. Therefore, the present invention is advantageous in that the outer path and the inner path of the heat sink are formed differently to improve the heat radiation efficiency by increasing the inflow of air according to the pressure difference during air convection.

Description

TECHNICAL FIELD [0001] The present invention relates to an improved light emitting diode (LED)

The present invention relates to an improved heat sink and an LED lighting device using the same. More particularly, the present invention relates to an improved LED lighting device using an improved heat sink, and more particularly, And more particularly, to an improved heat sink and an LED lighting device using the same.

In general, a lighting device is used for illuminating a dark place, and a lamp for emitting light when power is supplied is installed therein.

In recent years, LED lamps with low power and high brightness have been developed and LED lamps are used in various lighting devices.

An illumination device using an LED lamp is configured such that an LED lamp is turned on by supplying power to at least one or more LED lamps and a substrate to which a plurality of electric devices such as a semiconductor, a resistor, and a capacitor are coupled.

However, the LED lamp generates heat as high as it provides a bright light, causing the substrate to be caught, or electric elements located around the LED lamp to be damaged, resulting in malfunction or malfunction of the lighting device.

Recently, an LED lighting apparatus having a heat sink capable of emitting heat to an LED lamp has been disclosed in Korean Patent Registration No. 10-1098877.

The conventional LED lighting apparatus includes a heat sink having a plurality of heat dissipation fins formed on a substrate on which an LED lamp is mounted, and heat generated from the LED lamp is heat-exchanged with external air through a heat sink.

FIG. 1 is a perspective view showing a conventional LED lighting apparatus with a heat sink, and FIG. 2 is a sectional view showing a structure of a conventional LED lighting apparatus equipped with a heat sink.

1 and 2, the LED lighting apparatus 10 includes a plurality of LED chips 12 mounted on one side of a substrate 11, and a heat sink 13 mounted on the other side of the substrate 11 do.

The heat sink 13 is a rectangular aluminum or aluminum alloy member in which a plurality of rectangular heat radiating fins 13 'are installed to absorb heat generated from the LED chip 12 and emit the heat.

However, since the heat dissipation of the heat sink 13 is not high in the LED lighting apparatus 10 including the conventional heat sink 13, the heat sink 13 must be made larger in order to improve heat dissipation of the heat sink, Or a cooling device such as a fan that can lower the heat of the heat sink 13 must be additionally installed.

In order to solve this problem, the present invention provides an improved heat sink which improves the heat radiation efficiency by increasing the inflow of air according to the pressure difference in the convection of air by forming the outer path of the heat sink and the inner path differently, An object of the present invention is to provide a lighting apparatus.

In order to achieve the above object, the present invention provides an improved heat sink comprising: a base; A plurality of radiating fins extending from the base by a predetermined length; And at least one air inflow hole penetrating the lower end of the radiating fin to guide air into the inner side from the outer side, wherein the radiating fin has an outer side length of the radiating fin arranged outward from the center of the base, So as to generate a pressure difference in accordance with a moving direction and speed difference of air moving from the lower part to the upper part of the base along the surfaces of the outer side surface and the inner side surface, So that the inflow amount of the air introduced from the lower portion of the radiating fin is increased through the heat sink 130.

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Further, the radiating fins according to the present invention are characterized in that the lower end intervals of the radiating fins are formed to be shorter than the upper end spacing.

Further, the radiating fin according to the present invention is installed symmetrically about the center of the base.

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In addition, the radiating fin according to the present invention is characterized in that a plurality of individual pieces are formed by leaving only the base and cutting it to a predetermined width.

According to another aspect of the present invention, there is provided an LED lighting apparatus using an improved heat sink, comprising: a plurality of radiating fins formed by extending a predetermined length from a base; and at least one or more radiating fins punched at a lower end of the radiating fin, Wherein the heat radiating fins are formed such that the outer surface length of the heat radiating fins disposed in the outward direction from the center of the base is shorter than the inner surface length of the heat radiating fins arranged in the inward direction, A heat sink for generating a pressure difference in accordance with a difference in moving direction and speed of air moving from a lower portion of the base to an upper portion so that an inflow amount of air introduced from the lower portion of the radiating fin through the air inflow hole is increased; An LED module mounted on the substrate and having at least one or more LEDs for emitting light; And a housing in which the LED module is installed and fixed.

In addition, the LED module according to the present invention is further characterized in that the light output from the LED forms a constant light distribution pattern.

Further, the LED lighting apparatus according to the present invention further includes a cooling unit installed on the top of the heat sink to exhaust heat generated from the heat sink.

The present invention is advantageous in that heat radiation efficiency can be improved by increasing the inflow of air according to the pressure difference during air convection by forming the outer path and the inner path length of the heat sink differently.

1 is a perspective view of a conventional LED lighting apparatus with a heat sink.
BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to an LED lighting device,
3 is a cross-sectional view showing a first embodiment of an improved-type heat sink according to the present invention.
4 is a cross-sectional view illustrating a heat dissipation fin structure of the improved heat sink according to FIG. 3;
5 is a perspective view showing the improved type heat sink according to FIG. 3;
6 is a perspective view showing a second embodiment of the improved type heat sink according to the present invention.
7 is a cross-sectional view showing a part of the configuration of an LED lighting apparatus using an improved heat sink according to the present invention.
8 is a cross-sectional view illustrating an LED lighting device using an improved heat sink according to the present invention.
9 is an exploded perspective view showing a configuration of an LED lighting apparatus using an improved type heat sink according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of an improved heat sink and an LED roughing apparatus using the same according to the present invention will be described in detail with reference to the accompanying drawings.

(Heat sink)

FIG. 3 is a cross-sectional view showing a first embodiment of the improved heat sink according to the present invention, FIG. 4 is a cross-sectional view illustrating a heat sink fin structure of the improved heat sink according to FIG. 3, and FIG. It is a perspective view.

3 to 5, the modified heat sink 100 according to the first embodiment of the present invention is formed by differently forming the outer path and the inner path of the heat sink 100 so that the pressure difference A plurality of heat dissipation fins 120 and at least one air inflow hole 130 so as to improve the heat dissipation efficiency by increasing the air inflow according to the heat dissipation efficiency.

Also, the heat sink 100 is formed of aluminum or an aluminum alloy having a good thermal conductivity.

The base 110 is a plate member having a rectangular shape and one side is in close contact with a heat generating member (for example, the LED module 210, see FIG. 5) for providing a heat source, do.

The radiating fins 120 are plate-shaped members extending from the base 110, for example, at regular intervals in the upward direction, and the radiating fins 120 have a length of an outer side 121 arranged outward And the inner side surface 122 arranged in the inner direction are formed to have different lengths so that when the air convects, a pressure difference due to a length difference between both surfaces of the radiating fin 120 is generated.

It is preferable that the length of the outer surface 121 of the radiating fin 120 is shorter than the length of the inner surface 122,

The outer surface 121 of the radiating fin 120 is formed in a straight line so as to have a predetermined length L1 and the lengths L2, L3, L4 of the inner surface 122 of the radiating fin 120 And L5 are formed to be longer than the length L1 of the outer surface 121. [

The heat dissipation fin 120 is formed in a tapered shape such that the thickness T1 of the lower end portion is larger than the thickness T2 of the upper end portion and narrows in the direction from the inner side surface 122 to the outer side surface 121 of the radiating fin.

The flow of air moving upward along the inner side surface 122 of the radiating fin 120 while the air moves upward from the lower side of the radiating fin 120 collides with the surface of the inner side surface 122, For example, the direction of the outer surface 121 of the radiating fin 120. This causes the air to be accelerated toward the outer surface 121 of the radiating fin 120, So that the heat radiation efficiency is increased.

The flow of air moving upwards along the outer surface of the radiating fin 120 that is a rectilinear shape is caused by the difference in velocity of the air moving along the inner surface 122 of the adjacent radiating fin 120, A pressure difference is generated between the lower part and the upper part so that the air flows into the lower part of the radiating fin 120 more quickly.

For this, the lower end spacing P1 between the radiating fins 120 is shorter than the upper spacing P2, so that the pressure difference can be further increased.

The heat dissipation fins 120 are installed symmetrically with respect to the center C of the base 110 so that the heat dissipation efficiency of the heat dissipation fin 120 is increased from the inside of the base 110, And the side faces toward the center (C) side of the base.

The air inlet hole 130 is formed in the lower end of the radiating fin 120 so as to increase the amount of air flowing into the lower portion of the radiating fin 120. At least one hole is formed in the outer surface 121 of the radiating fin 120, Thereby guiding air into the side surface 122.

A plurality of air inflow holes 130 formed through lower ends of the heat dissipation fins 120 in addition to the air introduced into the space between the heat dissipation fins 120 formed at equal intervals (Left and right sides in the drawing of FIG. 3), so that the heat radiating effect can be increased through the inflow and outflow of the air quickly.

In this embodiment, the shape of the base 110 has been described as a rectangular shape for convenience of explanation. However, the shape of the base 110 is not limited thereto, but may be changed to a disk shape. In this case, 110 in the radial direction.

A pressure difference is generated between the lower portion and the upper portion of the radiating fin 120 due to the difference in velocity of the air moving along the inner side surface 122 of the radiating fin 120. Thus, air flows into the lower portion of the radiating fin 120 more quickly By being discharged, the heat radiation effect can be increased through the inflow and outflow of the rapid air.

6 is a perspective view showing a second embodiment of the improved type heat sink according to the present invention.

As shown in FIG. 6, the heat sink 100 'according to the second embodiment has different lengths of the outer path and the inner path of the heat sink 100' so that the inflow of air according to the pressure difference upon convection of air A plurality of heat dissipation fins 120 formed at equal intervals on the upper surface of the base 110 so that the heat dissipation efficiency can be improved and the heat dissipation fin 120 ), And a single piece (piece 123)).

That is, the plate-shaped radiating fins 120 arranged at equal intervals in comparison with the heat sink 100 according to the first embodiment are formed with a single piece of radiating fin having a predetermined width in the width direction, So that the heat radiation effect can be increased.

(Lighting device)

FIG. 7 is a cross-sectional view showing a part of the configuration of the LED lighting apparatus using the improved type heat sink according to the present invention, FIG. 8 is a sectional view showing the LED lighting apparatus using the improved type heat sink according to the present invention, Fig. 3 is an exploded perspective view showing a configuration of an LED lighting device using an improved heat sink.

3 to 9, the LED lighting apparatus 200 using the modified heat sink according to the present invention has a different length from the outer path and the inner path of the heat sink 100, The LED module 210, the cooling unit 220, and the housing 230 so that the heat radiation efficiency of the LED lighting apparatus 200 can be improved by increasing the inflow of air according to the temperature do.

The heat sink 100 has a plurality of heat dissipating fins 120 extending from the base 110 by a predetermined length and the heat dissipating fins 120 are arranged in an inner direction with a length of the outer side 121 arranged outwardly And the inner side surfaces 122 are formed to have different lengths and made of aluminum or an aluminum alloy having a good thermal conductivity.

The LED module 210 is coupled to the heat sink 100 through fastening means such as an adhesive or bolt and includes a substrate 211 and at least one LED 212 installed on the substrate 211 and outputting light ).

The LED 212 may be an LED that outputs white light mixed with a cool white or warm white or an arbitrary ratio of the cool white and the warm white, or an LED that outputs at least one of red, blue, and green colors , Or a LED coated with a phosphor for outputting an arbitrary color.

The LED module 210 includes a lens 213 disposed on the front side of the LED 212 so that the light output from the LED 212 forms a uniform light distribution pattern.

The cooling unit 220 includes a motor 221 and a cooling fan 222 disposed on the top of the heat sink 100 to exhaust heat generated from the heat sink 100.

The housing 230 has a structure in which the LED module 210 is installed and fixed and includes a receiving groove 231 through which the LED module 210 is installed and fixed, And a fixing part 232 provided outside the receiving groove 231 so as to be fixed to a hole (not shown).

The fixing part 232 is a leaf spring bent at one side, and the housing 230 can be fixed to the ceiling through an elastic force.

In this embodiment, the heat sink 100 having the plate shape has been described as a component for radiating heat. However, the heat sink 100 'in which the individual pieces 123 are formed on the heat radiating fin 120, As shown in FIG.

Accordingly, the heat generated by the operation of the LED module 210 is conducted to the heat sink 100, and the heat conducted to the heat sink 100 is transferred from the lower part to the upper part of the heat radiating fin 120, Allowing rapid cooling of the apparatus 200 and cooling through the cooling unit 220 more quickly.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. It can be understood that

In the course of the description of the embodiments of the present invention, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation, , Which may vary depending on the intention or custom of the user, the operator, and the definitions of these terms should be based on the contents throughout this specification.

100, 100 ': heat sink 110: base
120: radiating fin 121: outer surface
122: inner side 123:
130: Air inflow hole 200: Lighting device
210: LED module 211: substrate
212: LED 213: lens
220: cooling section 221: motor
222: cooling fan 230: housing
231: storage groove 232:

Claims (9)

As an improved heat sink,
A base 110; And
A plurality of radiating fins 120 extending from the base 110 by a predetermined length; And
And at least one air inflow hole (130) formed at the lower end of the radiating fin (120) to guide air into the inner side surface (122) from the outer side surface (121)
The radiating fins 120 are formed such that the length of the outer surface 121 of the radiating fins 120 arranged in the outward direction from the center of the base 110 is shorter than the length of the inner surface 122 of the radiating fins 120 arranged in the inner direction A pressure difference is generated in accordance with a moving direction and speed difference of air moving from the lower part to the upper part of the base 110 along the surfaces of the outer side surface 121 and the inner side surface 122, So that the inflow amount of the air introduced from the lower portion of the radiating fin (120) is increased.
delete The method according to claim 1,
Wherein the radiating fins (120) are formed such that the lower end spacing (P1) of the radiating fins is shorter than the upper spacing (P2).
The method according to claim 1,
Wherein the heat dissipation fins (120) are installed symmetrically about the center of the base (110).
delete The method according to claim 1,
Wherein the heat dissipation fin (120) is formed with a plurality of individual pieces (123) by cutting the base (110) to a predetermined width while leaving only the base (110).
An LED lighting device using an improved heat sink,
A plurality of radiating fins 120 formed by extending a predetermined length from the base 110 and at least one or more radiating fins 120 that are perforated at the lower end of the radiating fin 120 to guide air into the inside surface 122 from the outside surface 121 The air inlet hole 130 is formed in the outer surface 121 of the heat dissipation fin 120 and the heat dissipation fin 120 is arranged in the outward direction from the center of the base 110, The pressure difference between the moving direction of the air moving from the lower part of the base 110 to the upper part along the surface of the outer side surface 121 and the upper surface of the inner side surface 122, A heat sink 100 or 100 'formed to increase an inflow amount of air introduced from a lower portion of the radiating fin 120 through the air inflow hole 130;
An LED module 210 having a substrate 211 installed in close contact with the heat sinks 100 and 100 'and at least one LED 212 mounted on the substrate 211 to emit light; And
And a housing (230) for mounting and fixing the LED module (210).
8. The method of claim 7,
Wherein the LED module (210) further comprises a lens (213) for forming a light distribution pattern of light output from the LED (212).
9. The method according to claim 7 or 8,
The LED lighting apparatus further includes a cooling unit 220 mounted on the heat sinks 100 and 100 'for discharging heat generated from the heat sinks 100 and 100' .

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