KR100953499B1 - Heat-sink for led lamp - Google Patents

Abstract

PURPOSE: A heat sink for an LED lamp is provided to maximize heat radiation effects by forming a plurality of heat radiation units with a wave shape. CONSTITUTION: A plurality of heat radiation units(320) is formed on the outer circumference of a heat sink body(310). The heat radiation unit is comprised of a plurality of radiation fins(321). A protrusion(324) is formed on both sides of the radiation fin with a semicircular shape. A plurality of heat radiation protrusions(322) is formed on the outer surface of the heat radiation unit. The heat radiation protrusion includes one or plural heat points or linear protrusions. The heat point is formed on the outer surface of the heat radiation unit. The linear protrusion is formed on the outer surface of the heat radiation unit in a longitudinal direction.

Description

Heat sink for LED bulb {HEAT-SINK FOR LED LAMP}

The present invention relates to a heat sink, and more particularly, to maximize the contact area with air so as to dissipate heat generated from heat, and to allow the flow of hot air to flow in a predetermined direction, and to operate inside the substrate. The present invention relates to a heat sink for an LED bulb capable of dissipating heat by flowing downwardly high temperature air.

In general, light emitting diodes (LEDs), which are widely used as billboards, signs, lights, and other optical materials, have been used in general lighting because of improved optical efficiency.

However, high power / high efficiency LED exhibits a property of deteriorating optical characteristics at high temperatures according to heat generation characteristics. Therefore, in order to maintain constant optical characteristics, the heat generated from the LED must be sufficiently radiated. Insufficient heat dissipation may result in deterioration of optical output characteristics, long term life span and efficiency degradation.

In order to solve this problem, a heat radiator is used to radiate heat generated from semiconductor components such as LEDs to the atmosphere as described above. As a conventional radiator, a heat radiator is used to radiate heat using copper or aluminum having good thermal conductivity. In addition, there is a structure using a heat pipe in which a heat transfer liquid is built in and heat transfer liquid efficiently transfers heat while repeatedly circulating vaporization and liquefaction.

On the other hand, as described above, since the heat dissipator using a medium such as copper and aluminum having excellent thermal conductivity depends on the heat conductivity of the material itself, the heat dissipation property is used in proportion to the area of the heat dissipation body. The radiator should be made to use a radiator or improve the ventilation structure.The radiator of the structure that made the area of the radiator large by using materials such as copper or aluminum has a low temperature transfer rate, so the temperature of the radiator is There is a problem that takes time to lower.

On the other hand, in the heat dissipation technology using a heat pipe for cooling the CPU in the computer field, the heat is conducted using a circular heat pipe, and then cooled by a heat sink having a size larger than that of the heat dissipation source or an additional fan is attached. It is intended to improve the cooling performance.

However, in a product to be designed in a small area, it is difficult to attach such a large heat sink even when using a heat pipe, and it is difficult to expect effective cooling performance when the fan cannot be used.

The present invention was created in order to solve the above problems, an object of the present invention is to maximize the contact area with the air so as to dissipate the heat generated heat, so that the flow of hot air can flow in a certain direction In addition, the present invention provides a heat sink capable of dissipating heat by flowing downwardly high temperature air generated by a substrate or the like operated therein.

The present invention provides a heat sink for solving the above problems.

The heat sink comprises a heat sink body; And a plurality of heat dissipation parts formed on an outer circumference of the heat sink body and including heat dissipation wings having one or more bends along the upper and lower sides.

Here, it is preferable that the heat dissipation blade having the curvature has a shape having one or more curvatures.

In addition, each of the plurality of heat dissipating parts is preferably formed by sequentially overlapping the heat dissipation wings having one or more curvatures.

In addition, the heat dissipation wings are formed of any one of a straight form and one side bent shape, each side of each of the heat dissipation wings are formed with protrusions protruding in a semicircular shape at one or more positions facing each other, It is desirable to bend.

In addition, the heat dissipation blades in each of the heat dissipation portions are preferably arranged to be offset from each other.

In addition, it is preferable that a plurality of heat dissipation protrusions protrudingly formed on an outer surface of each of the plurality of heat dissipation parts.

Here, each of the plurality of heat dissipation protrusions, one or a plurality of hot spots formed on the outer surface of each of the heat dissipating portion, and a straight protrusion protruding in a straight direction along the longitudinal direction of the heat dissipating portion on the outer surface of each of the heat dissipating portion It is desirable to.

In addition, the heat sink body is preferably formed in a hollow shape to form a shape that gradually opens along the bottom from the top, the space in which the substrate is located.

In addition, the inner circumference of the heat sink body is preferably formed with a plurality of auxiliary heat dissipation portion is formed in a shape bent to one side along the vertical direction of the heat sink body at a predetermined interval.

In addition, it is preferable that auxiliary protrusions protruding in a semicircular shape are formed at one or more positions facing each other in each of the plurality of auxiliary heat dissipating portions.

In addition, the plurality of heat dissipating parts and the plurality of auxiliary heat dissipating parts may be sanded on an outer surface thereof.

In addition, the heat sink is preferably made of foamed aluminum.

The present invention maximizes the contact area with the air to dissipate the heat generated, to allow the flow of high-temperature air in a certain direction, and to lower the high-temperature air generated due to the substrate operating inside It has the effect of heat dissipation by flowing.

Hereinafter, the heat sink of the present invention will be described with reference to the accompanying drawings.

Figure 1a is a view showing the heat dissipation formed on the outer circumference of the heat sink body of the present invention. Figure 1b is a view showing another embodiment of the heat dissipation portion formed on the outer circumference of the heat sink body of the present invention. FIG. 2A is a view illustrating auxiliary heat dissipation parts formed on an inner circumference of the heat sink body of FIG. 1. FIG. 2B is a view illustrating another embodiment of auxiliary heat dissipation parts formed on an inner circumference of the heat sink body of FIG. 1. 3 is a perspective view showing an example in which the heat sink of the present invention is adopted in the LED bulb. 4 is an exploded perspective view illustrating the LED bulb of FIG. 3. FIG. 5 is a front view illustrating the LED bulb of FIG. 4. FIG. 6 is a plan view illustrating an LED bulb having a heat dissipation unit of 1a. FIG. 7 is a plan view illustrating the LED bulb having the heat dissipation unit of FIG. 1B.

Referring to Figure 1, Figure 2a, the configuration of the heat sink of the present invention is as follows.

Here, in describing the heat sink of the present invention, a case where the heat sink is adopted in the LED bulb will be described as a representative example.

The heat sink 300 has a heat dissipation part 320 forming a hollow shape and forming heat dissipation vanes 321 having a plurality of bends along the upper and lower surfaces thereof.

The heat sink 300 has a heat sink body 310 and the plurality of heat dissipating parts 320 formed on an outer circumference of the heat sink body 310 and having a shape having one or more curvatures along the top and bottom.

The heat sink body 310 may be formed in a hollow shape, and may be coupled to the base plate 200 on which the SMPS substrate 10 is installed at the upper end of the heat sink body 310. An annular protrusion 201 is formed on the inner circumference of the base plate 200.

 In addition, each of the plurality of heat dissipating parts 320 is formed by sequentially radiating the heat dissipation blades 321 having one or more curvatures. In addition, the heat dissipation vanes 321 are formed to overlap each other, and are formed to be offset from each other.

Here, protrusions 323 and 324 are formed at both sides of each of the heat dissipation vanes 321 to protrude in a semicircle at one or more positions facing each other, thereby forming the bending. In addition, the protrusions 323 and 324 may be formed to gradually increase along the top and bottom of the heat dissipation blade 321. Here, the protrusions 323 and 324 are divided into an upper protrusion 323 and a lower protrusion 324, and the size of the protrusions 323 and 324 is larger than that of the upper protrusion 323. Is formed.

Therefore, since the heat dissipation parts 320 are formed to have a curvature with a curvature, the flow of heat generated from the SMPS substrate 10 and the metal core substrate 400 may be easily moved from above the heat sink 300. It can be made to flow.

In addition, by forming a wave pattern, the contact area with the air of the heat dissipation vanes 321 may be increased to heat or easily radiate heat.

1A and 6, the heat dissipation vanes 321 may be formed in a straight shape, and as shown in FIGS. 1B and 7, the heat dissipation vanes 321 may be curved to one side. It can also be achieved. In the former and the latter case, the limitation on the shape of the heat dissipation vanes 321 may be a major factor in determining the path of heat transfer.

In addition, a plurality of heat dissipation protrusions 322 may be further formed on the outer surface of each of the plurality of heat dissipation parts 320.

Here, each of the plurality of heat dissipation protrusions 322 is one or a plurality of hot spots 322a formed on an outer surface of each of the heat dissipation parts 320, preferably the heat dissipation wings 321, and the heat dissipation parts 320. Each of the outer surface is formed of a protruding protrusion (322b) protruding in a straight line along the longitudinal direction of the heat dissipation unit (320).

The date protrusion 322b is not necessarily limited to the straight shape but may be formed to have various shapes and bends in order to increase the contact area with air.

Here, the hot spot 322a has a shape of a point so as to protrude outward from a plurality of locations on the outer surface of the heat dissipating part 320, and concentrates external heat locally on the outer surface of the heat dissipating part 320. Can act as a heat dissipation. The shape of the point may be a shape in which a volume narrows as it protrudes outward.

In addition, the date protrusions 322b formed on the outer surfaces of the heat dissipating parts 320 are straight or bar-shaped protrusions and are formed along the length direction of the heat dissipating parts 320. That is, the date protrusions 322b formed on the outer surfaces of the heat dissipating parts 320 are radially formed based on the center of the heat sink body 310.

Therefore, the date protrusions 322b easily flows the external heat to the bottom of the heat sink 300, and further increases the contact area with air to further dissipate the heat.

In addition, the heat dissipation protrusion 322 composed of the hot spots 322a and the straight protrusions 322b provides an increase in the contact area with air in addition to the contact area with air due to the wavy heat dissipation portions 320. Therefore, the contact area with the optimum air for dissipating heat can be maximized.

On the other hand, the inner circumference of the heat sink body 310 may be further formed a plurality of auxiliary heat dissipation unit 330 is formed along the vertical direction of the heat sink body 310 and formed at a predetermined interval.

The plurality of auxiliary radiator 330 may have a straight shape along the top and bottom as shown in Figure 2a, or may be formed in a shape bent to one side along the top and bottom, as shown in Figure 2b.

In addition, since any one of the auxiliary heat dissipating portions 330 illustrated in FIGS. 2A and 2B is disposed radially with respect to the center of the heat sink body 310, the inner and base plates of the heat sink body 310 are disposed. The flow of heat formed inside 200 flows downward, providing an increase in the contact area with air. Accordingly, the auxiliary heat dissipation parts 330 may rapidly lower the hot air generated in the SMPS substrate 10 and the metal core substrate 400 downward.

In addition, auxiliary protrusions 330a protruding in a semicircular shape may be formed at one or more positions facing each other in each of the auxiliary heat dissipating units 330. In addition, each of the auxiliary radiator 330 is formed in the shape of a protruding wing, the hot spot 322a mentioned above may be further formed. Here, the width of each of the auxiliary radiator 330 may be formed to gradually narrow along the up and down.

In addition, the outer surfaces of the plurality of heat dissipating parts 320, the plurality of auxiliary heat dissipating parts 330, and the heat sink body 310 are sanded (or etched).

Accordingly, the heat dissipating parts 320 and the auxiliary heat dissipating parts 330 are sanded or etched to form a roughness or more on the surface, and the heat dissipating parts 320 and the auxiliary heat dissipating parts 330 are separated from the air. The contact area can be further increased beyond a certain amount.

In addition, the heat sink 30 is preferably made of foamed aluminum. That is, the heat sink body 310, the heat dissipating parts 320, and the auxiliary heat dissipating parts 330 are made of foamed aluminum in which a plurality of holes are drilled, thereby providing a contact area with air. That is, even if the heat dissipation unit 320 and the auxiliary heat dissipation unit 330 are excluded, the heat sink 300 may have a self-heat dissipation function.

Here, reference numeral 100 denotes a socket fitting body, and 500 denotes a diffusion cap that diffuses light emitted from the LEDs installed on the metal core substrate to the outside.

In the above, a case in which the heat sink of the present invention is adopted as an LED bulb has been described as a representative example. In addition, the heat sink of the present invention can be easily adopted in an apparatus that generates a certain amount of heat such as an electronic device and a lighting luminaire such as a fluorescent lamp. have. The LED bulb may be a bulb as shown in FIGS. 3 to 6.

As described above, in the detailed description of the present invention has been described with respect to preferred embodiments of the present invention, those skilled in the art to which the present invention pertains various modifications can be made without departing from the scope of the invention Of course.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below, but also by the equivalents of the claims.

Figure 1a is a view showing the heat dissipation formed on the outer circumference of the heat sink body of the present invention.

Figure 1b is a view showing another embodiment of the heat dissipation portion formed on the outer circumference of the heat sink body of the present invention.

FIG. 2A is a view illustrating auxiliary heat dissipation parts formed on an inner circumference of the heat sink body of FIG. 1.

FIG. 2B is a view illustrating another embodiment of auxiliary heat dissipation parts formed on an inner circumference of the heat sink body of FIG. 1.

3 is a perspective view showing an example in which the heat sink of the present invention is adopted in the LED bulb.

4 is an exploded perspective view illustrating the LED bulb of FIG. 3.

FIG. 5 is a front view illustrating the LED bulb of FIG. 4. FIG.

6 is a plan view illustrating an LED bulb having a heat dissipation unit of 1a.

FIG. 7 is a plan view illustrating the LED bulb having the heat dissipation unit of FIG. 1B.

* Description of main parts *

10: SMPS substrate

100: socket fitting

200: base plate

210: fixed member

220: socket

221: annular projection formed on the inner circumference of the socket

300: heat sink

310: heat sink body

320: heat dissipation unit

321: heat dissipation wing

322: heat dissipation protrusion

330: auxiliary radiator

400: metal core substrate

410: substrate body

411: annular projection

440: reflector

500: Diffusion Cap

Claims (12)

A heat sink body installed in the LED bulb; And Is formed on the outer periphery of the heat sink body and comprises a plurality of heat dissipation portion consisting of heat dissipation wings having one or more bends along the top and bottom, Each of the plurality of heat dissipating parts is formed by sequentially overlapping the heat dissipation wings having one or more curvatures, Both side portions of each of the heat dissipation wings are heat sinks for LED bulbs, characterized in that the protrusions are formed to protrude in a semicircular form at one or more positions facing each other to form the curve. The method of claim 1, The heat dissipation blade having one or more bends, the heat sink for the LED bulb, characterized in that formed in a shape having one or more curvature. delete The method of claim 1, The heat dissipation wing is a heat sink for the LED bulb, characterized in that any one of the form of a straight shape and curved side. 3. The method of claim 2, The heat sink for the LED bulb, characterized in that the heat dissipation wings are arranged to be offset from each other. The method of claim 1, LED light bulb heat sink, characterized in that the outer surface of each of the plurality of heat dissipating portion is further formed a plurality of heat dissipating projections are formed. The method of claim 6, Each of the plurality of heat dissipation protrusions, LED light bulb heat sinks having one or more hot spots formed on the outer surface of each of the heat dissipating portions, and a straight protrusion protruding in a straight line along the length direction of the heat dissipating portion on the outer surface of each of the heat dissipating portions. . The method of claim 6, The heat sink body is a heat sink for the LED bulb, characterized in that formed in a hollow shape forming a space that is gradually formed along the bottom from the top, the substrate is located therein. The method of claim 8, LED light bulb heat sink characterized in that the inner circumference of the heat sink body further comprises a plurality of auxiliary heat dissipation portion is formed in a shape bent to one side along the vertical direction of the heat sink body at a predetermined interval. The method of claim 9, LED light bulbs heat sinks, characterized in that the auxiliary projections are formed on both sides of each of the plurality of auxiliary heat dissipating portions protruding in a semicircular shape at one or more positions facing each other. The method of claim 9, The plurality of heat dissipating parts and the plurality of auxiliary heat dissipating parts are heat sink for the LED bulb, characterized in that the outer surface is sanded. The method of claim 1, The heat sink is a heat sink for the LED bulb, characterized in that made of foamed aluminum.

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