KR20120002867A - Heat sink for led lighting apparatus - Google Patents

Abstract

PURPOSE: A heat sink for LED lighting apparatus is provided to maximize a thermal effect of a heat sink by forming at least two hollow frames and an open groove portion contacting with the heat sink. CONSTITUTION: An LED module is settled in an LED module settling plate(210). An exterior wall(220) is connected to the LED module settling plate. A partition wall(230) is formed between a heat radiation frame(P) and the LED module settling plate. Hollows(223, 224) are formed while being extended to a longitudinal direction having a space part. An outer circumference of exterior walls(221, 222) is formed to be a symmetric half-moon shape. A hanging piece is formed to fix an LED module. An open groove part(233) consists of a first space of an inner side and a second space of an outside side.

Description

Heat sink for LED luminaires {HEAT SINK FOR LED LIGHTING APPARATUS}

The present invention relates to a heat sink for a light emitting diode (LED) luminaire, and more particularly, the heat sink can be light-weighted by providing a heat dissipation frame with at least two hollow parts and at least one open groove configured to contact outside air. And it relates to a heat sink for LED luminaire maximized heat dissipation effect.

In recent years, LED lamps, which use LEDs as light sources, which have a very small power consumption and have almost a semi-permanent LED, have been in the spotlight.

However, LEDs used as light sources for LED luminaires have a problem that their lifetime decreases and the luminous efficiency decreases when the temperature rises above the rated operating temperature due to the characteristics of semiconductor devices. Therefore, in order to increase the output of the LED, a heat dissipation structure is required that can effectively dissipate heat generated from the LED and operate within the lowest operating temperature.

In general, the heat dissipation structure used in the LED luminaire has a structure in which heat is radiated to the atmosphere through the heat dissipation plate by fixing the metal printed circuit board to the heat dissipation plate. The fixing of the printed circuit board and the heat sink is made of a heat radiation adhesive tape or a screw. When the heat dissipation adhesive tape is used, it is expensive and the heat dissipation adhesive tape prevents direct contact between the printed circuit board and the heat sink, thereby reducing the heat dissipation effect. In addition, the fixing method by the screw is a material of the general heat sink is aluminum, so can not be contacted with a sufficient contact pressure, so that the contact resistance between the screw and the heat sink is increased, thereby reducing the heat radiation effect.

Looking at the case of a line-type LED luminaire that can be inserted into a conventional fluorescent lamp socket, as shown in Figures 1a and 1b, the rectangular PCB substrate 102 formed with a plurality of LEDs 101 in the longitudinal direction reflector plate 106 The heat dissipation parts 103 and 104 are provided in the back of the reflecting plate 106, and the cover 107 made of a plastic material is couple | bonded with the engaging part 105 formed in the reflecting plate 106. As shown in FIG. The conventional heat sink shown in FIG. 1A has a fin-like heat sink, while the conventional heat sink shown in FIG. 1B has a single hollow portion inside the heat radiation frame.

The former has an advantage of increasing heat dissipation efficiency by contact with air, but when dust is accumulated between the fins, the heat dissipation efficiency may be sharply lowered. The latter has the advantage of minimizing the weight of the heat sink, but may cause deformation and sagging due to heat, and in particular, since the part where the PCB is mounted in the single hollow part is surrounded by the closed air layer, the temperature of the part is Rather, there is a problem that can rise and the heat radiation effect is lowered.

The present invention is to solve the above-mentioned conventional problems, by providing a structure of at least two hollow portion in the heat dissipation frame and at least one open groove configured to be in contact with the outside air, it is possible to lighten the heat sink and maximize the heat dissipation effect LED The object is to provide a heat sink for a luminaire.

According to the present invention for achieving the above object, the heat sink for the LED luminaire, the heat sink for the LED luminaire to be installed in the LED luminaire, the LED module seating plate on which the LED module is seated, and the outer peripheral surface of the outer wall connected to the LED module seating plate And a heat dissipation frame including a pair of outer walls constituting the outer wall, and a pair of partition walls interconnecting the LED module seating plate and the outer wall at a center thereof, the outer wall extending at least in a longitudinal direction to secure a predetermined space. Two hollow parts are formed, and between the partition walls, at least one open groove part extending in a longitudinal direction through which external air is vented is formed.

The LED module seating plate further includes an LED module insertion groove for inserting the LED module, the LED module insertion groove is characterized in that it comprises a locking piece for fixing the LED module.

The open groove is formed of an inner first space and an outer second space, and the width of the first space is larger than the width of the second space. Here, the first space and the second space has a rectangular cross section, preferably, the width of the first space may be formed equal to the width of the second space.

Preferably, the heat dissipation frame is made of an extruded aluminum material, at least one protrusion is formed extending along the longitudinal direction of the outer peripheral surface of the heat dissipation frame. In addition, a ceramic paint coating layer containing tourmaline of fine powder may be further formed on the outside of the heat dissipation frame.

According to an aspect of the present invention, there is provided an LED luminaire including an LED module including a PCB substrate on which a plurality of LEDs are mounted, comprising: a heat sink having the above-described characteristics, an LED module seated on an LED module seating plate of the heat sink; It is made of a hemispherical shape and an elastic member, characterized in that it comprises a cap that is fitted in the cap insertion groove from the top of the heat sink, and a fixing cover for covering and fixing both ends of the heat sink and the cap.

The fixing cover is fixed by at least one coupling bolt nut which is vertically coupled with respect to the heat sink in the opening groove, preferably, the fixing cover uses a width difference between the first and second spaces forming the opening groove. The auxiliary body is inserted into the first space and fixed by screwing the auxiliary body.

In addition, the fixing cover is fixed by at least one or more coupling bolts vertically coupled to the heat dissipation plate in the open groove, preferably, the fixing cover is screwed without a difference in width between the first and second spaces forming the open groove. It is fixed by fastening.

In addition, the fixing cover is fixed by a coupling bolt horizontally coupled to the heat dissipation frame in the open groove portion, wherein the fixing cover is coupled to the heat dissipation frame horizontally in the at least two hollow parts second coupling bolt It can be further fixed by.

According to the heat sink for LED luminaire according to the present invention, by providing the structure of the at least two hollow portion in the heat dissipation frame can minimize the weight of the heat sink, there is an effect that can reduce the deformation, sagging due to heat and the like.

In addition, by providing at least one open groove configured to contact the outside air in the heat dissipation frame to maximize the heat dissipation effect by allowing the PCB (LED module) mounting portion is sufficiently exposed to the outside air, resulting in LED performance There is an effect to improve.

In addition, by forming the LED module insertion groove in the heat sink, there is no need to use an expensive heat-resistant adhesive tape, there is an effect that can maximize the heat dissipation effect and workability through direct contact between the PCB and the heat sink.

Incidentally, the fixing cover can be fixed to the heat sink without any hole and other processing, and by coating a ceramic paint containing tourmaline of fine powder that emits anion and far infrared rays on the outside of the heat dissipation frame, It can emit far infrared rays and contribute to health promotion.

1A and 1B are views for explaining a problem of a heat sink for LED lighting according to the prior art.
Figure 2 is a cross-sectional view showing the configuration of a heat sink for LED lighting according to an embodiment of the present invention.
Figure 3 is a cross-sectional view for explaining the heat treatment flow of the heat sink for the LED lighting device according to an embodiment of the present invention.
4 is a cross-sectional view illustrating an example in which a heat sink for an LED luminaire according to an embodiment of the present invention is applied to a line type LED luminaire.
5 is a view for explaining a fixing method of the fixing cover according to another embodiment of the present invention.
6a and 6b are views for explaining a fixing method of the fixing cover according to another embodiment of the present invention.
7 is a view for explaining a state in which the line-type LED lighting fixture is fixed to the ceiling according to an embodiment of the present invention.
8A and 8B are cross-sectional views taken along line BB of FIG. 7.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are defined in the technical spirit of the present invention on the basis of the principle that the inventor can appropriately define the concept of the term in order to explain his invention in the best way. It must be interpreted to mean meanings and concepts.

Hereinafter, with reference to the accompanying drawings will be described a characteristic configuration of the present invention.

2 is a view showing the configuration of a heat sink for LED lighting according to an embodiment of the present invention.

Referring to FIG. 2, the heat sink 200 for LED lighting includes a heat radiation frame P, at least two hollow parts 223 and 224, and at least one open groove part 233.

First, the heat dissipation frame (P) constitutes a body of the heat dissipation plate 200, and includes a LED module seating plate 210, an outer wall 220, and a partition wall 230.

An LED module is mounted on the LED module seating plate 210, and the outer wall 220 is connected to the LED module seating plate 210 to form an outer wall of the heat dissipation frame P whose outer peripheral surface is symmetrical. The barrier rib 230 interconnects the LED module seating plate 210 and the outer wall 220 at the bottom of the LED module seating plate 210, that is, at the center of the heat dissipation frame. For example, the outer wall 220 may have an outer circumferential surface having a half moon-type symmetrical appearance. However, the shape of the outer wall 220 according to an embodiment of the present invention is merely an example, and may take various forms in the shape thereof.

In detail, a pair of outer walls 221 and 222 having a bilaterally symmetrical appearance are connected to both sides of the LED module seating plate 210, and a pair of partition walls 231 and 232 beneath the LED module seating plate 210. ) Is integrally connected to the LED module seating plate 210 and the pair of outer walls (221, 222).

Preferably, the heat radiation frame (P) is made of an aluminum material excellent in thermal conductivity. More preferably, the heat dissipation frame (P) is configured to be integrally composed of aluminum extrusion material to quickly release the heat generated from the LED to prevent degradation and malfunction.

At least two hollow parts 223 and 224 extending in the longitudinal direction are provided between the pair of outer walls 221 and 222 and the pair of partitions 231 and 232 to secure a predetermined space. The configuration of the hollow parts 223 and 224 may minimize the weight of the heat sink, and provide a secondary effect of reducing deformation, sagging, and the like due to heat. For example, the hollow parts 223 and 234 may have symmetrical structures, and may be formed in the first to third spaces a1, a2, and a3, respectively. However, the shapes of the first to third spaces a1, a2, and a3 according to an embodiment of the present invention are merely examples, and may take various forms in shape and the like.

At least one open groove portion 233 through which outside air passes is formed between the pair of partition walls 231 and 232. The at least one open groove part 233 is disposed between the at least two hollow parts 223 and 224. Preferably, the open groove part 233 and the two hollow parts 223 and 224 are formed in the longitudinal direction of the heat dissipation frame P in parallel with each other.

The open groove 233 may be formed of first and second spaces b1 and b2, and the first space and the second spaces b1 and b2 may have a rectangular cross section. However, the shape of the first space and the second space (b1, b2) is merely an example, and may take various forms in the shape and the like.

In this case, the first space b1 is a space in which the LED module is mounted, that is, a space close to the LED module seating plate 210, and the second space b2 is a space exposed to the outside air. At this time, the width of the first space (b1) may be formed larger than the width of the second space (b2), thereby designing to increase the amount of contact with the outside air. As another modification, it is also possible to form the width of the first space b1 and the width of the second space b2 equally.

In particular, the open groove 233 has a large structural difference from the hollow parts 223 and 224 in that it is configured to contact the outside air. This configuration is different from the conventional heat sink having a single hollow portion in which the LED module seating plate 210 is surrounded by a closed air layer (see FIG. 1B), so that the LED module seating plate 210 is in direct contact with an external air layer. As a result, the heat dissipation effect can be significantly improved.

The LED module seating plate 210 further includes an LED module inserting groove 216 for inserting an LED module, and also includes locking pieces 212 and 214 for fixing the LED module. As will be described later, the LED module insertion groove 216 of the LED module seating plate 210 is inserted and fixed to the LED module 240 made of a PCB substrate 242 on which a plurality of LEDs 241 are mounted. .

The pair of outer walls 221 and 222 are provided with a plurality of protrusions 225 and 226 in the longitudinal direction along the outer circumferential surface to increase the outer surface area. That is, according to the present invention, the outer peripheral surface of the pair of outer walls 221 and 222 is formed with a plurality of protrusions 225 and 226 having roughly concave-convex shapes, thereby increasing the total surface area and consequently enhancing the heat dissipation effect.

However, the shape of the plurality of protrusions 225 and 226 according to an embodiment of the present invention is merely an example, and various shapes (for example, 'V' and '∩' characters, etc.) in the shape thereof may be used. Can be taken.

Figure 3 is a cross-sectional view for explaining the heat treatment flow of the heat sink for the LED lighting device according to an embodiment of the present invention.

Referring to FIG. 3, an LED module 240 including a PCB substrate 242 on which a plurality of LEDs 241 are mounted is inserted into the LED module insertion groove 216 of the LED module seating plate 210.

As mentioned above, in the heat sink having a single hollow part, since the part where the PCB is mounted, that is, the LED module seating plate 210 is surrounded by the closed air layer, the temperature of the part may be rather increased, and thus the heat dissipation effect is increased. There was a problem of deterioration. However, in the present invention, since the LED module seating plate 210 is configured to sufficiently contact the outside air, there is an advantage that the heat dissipation effect is maximized. In other words, the heat dissipation is performed through the heat dissipation paths ① and ② of the heat dissipation frame P itself, and at the same time, the external air introduced through the opening of the opening groove 233 passes through the LED module seating plate 210 and then again. By forming an air flow (③) which is released through the opening of the open groove 233, the heat generated by the LED element is effectively radiated to the outside. Therefore, since the LED module seating plate 210 is in direct contact with the outside air layer, the heat dissipation effect may be remarkably improved.

4 is a cross-sectional view illustrating an example in which a heat sink for an LED luminaire according to an embodiment of the present invention is applied to a line type LED luminaire.

Referring to FIG. 4, the LED module seating plate 210 is inserted into and seated on the LED module 240 made of a PCB board 242 on which a plurality of LEDs 241 are mounted, and is attached to the engaging pieces 212 and 214. It is firmly fixed by

In addition, the cap insertion grooves 227 and 228 are formed of a hemispherical shape and an elastic member to be easily detachable cap 310.

The cap 310 is composed of a semi-transparent member for correcting the amount of light emitted from the light source irradiated from the LED module 240, by transmitting the direct light of the LED module 240 through the cap 310 formed of a semi-transparent member more natural And soft lighting is possible to reduce fatigue of the user's eyes.

Finally, the fixing cover 312 covers both ends of the outer wall 220 and the cap 310 of the heat dissipation frame, that is, the LED module 240 is mounted on the LED module seating plate 210, the heat dissipation When the cap 310 is coupled to the cap insertion grooves 227 and 228 in the upper portion of the frame P to form an assembly, the fixing cover 312 covers both ends of the assembly to fix the assembly.

The fixing cover 312 is connected to a power terminal (not shown) and a power supply (not shown) electrically connected to the LED module 240 to supply power to the LED module 240 to emit light.

In FIG. 4, the fixing cover 312 is fixed by at least one coupling bolt nut 314 vertically coupled to the heat sink in the opening groove 233. In detail, the fixing cover 312 inserts an auxiliary material, for example, a nut, into the first space b1 by using a width difference between the first and second spaces b1 and b2 of the opening groove 233. It can be fixed by fastening a bolt to the nut. This configuration allows the fixing of the fixing cover to the heat sink without a separate hole and other processing. In addition, at least one coupling bolt nut can be used, which provides the advantage that a separate pedestal configuration for the sagging of the luminaire is not required.

5 is a view for explaining a fixing method of the fixing cover according to another embodiment of the present invention.

Referring to FIG. 5, except that the widths of the first and second spaces b1 and b2 of the opening groove 233 are the same, the fixing cover 312 is similar to the fixing cover fixing method of FIG. 4. ) Is fixed by a coupling bolt 315 coupled vertically to the heat sink in the open groove 233. Here, the coupling bolt 315 is inserted into the opening groove 233 having the same width of the first and second spaces b1 and b2 to firmly couple the heat sink and the fixing cover 312.

6a and 6b are views for explaining a fixing method of the fixing cover according to another embodiment of the present invention.

6A and 6B, the fixing cover 312 is horizontally coupled in the opening groove 233. Specifically, the coupling bolt 316 is horizontally coupled to the heat dissipation frame (P). At this time, the coupling bolt 316 is inserted into the first space (b1) of the opening groove 233 to firmly couple the heat sink and the fixing cover 312.

In this embodiment, only one coupling bolt 316 is coupled to the open groove 233. In this case, the coupling force between the fixing cover 312 and the heat sink may be weakened. Thus, at least one or more coupling bolts 316 may be used. Preferably, in order to improve the bonding force between the fixing cover 312 and the heat sink, one coupling bolt 316 is inserted into the opening groove 233 to be coupled, and two other coupling bolts 316 are inserted into two hollow portions. 223 and 224 may be inserted and combined respectively.

7 is a view illustrating a state in which a line type LED light fixture is fixed to a ceiling according to an embodiment of the present invention, and FIGS. 8A and 8B are cross-sectional views taken along line BB of FIG. 7.

Referring to FIG. 7, the line type LED luminaire 400 is fixed in such a manner as to be suspended from the ceiling by the wire 410 and the support coupling means 420. Here, the support coupling means 420 may be formed of a support coupling bolt nut 420a or a support coupling bolt 420b. Here, the wire 410 may be tied to the support coupling means 420, or may be coupled to the support coupling means 420 by a pin or the like. In addition, the wire 410 may be coupled to the support coupling means 420 by a bolt (not shown) coupled to the end of the wire 410 by welding or the like. In this case, although not shown, the support coupling means 420 may further include a hole to which the bolt is coupled.

Referring to FIG. 8A, the heat sink 200 may be fixed to the ceiling by at least one support bolt nut 420a coupled to the heat sink 200 vertically with respect to the heat sink 200.

In addition, referring to FIG. 8B, the heat sink 200 may be fixed to the ceiling by at least one support coupling bolt 420b which is vertically coupled to the heat sink in the open groove 233.

For reference, in FIG. 8A, the opening groove 233 is fixed in such a manner as to insert an auxiliary, that is, a nut, in the first space and fasten a screw to the nut using the width difference between the first and second spaces. In 8b, there is a difference that the opening groove 233 is fixed by screwing without difference in the widths of the first and second spaces.

This configuration allows the heat sink to be fixed to the upper luminaire or ceiling without additional holes and other processing. In addition, since at least one support coupling bolt nut or support coupling bolt can be used, it provides the advantage that a separate pedestal configuration for the sagging of the luminaire is not required.

On the other hand, in the present invention, the outside of the heat dissipation frame 101 is coated with a ceramic paint containing fine powder tourmaline (tourmaline) that emits negative ions and far infrared rays. Accordingly, it is possible to emit negative ions and far infrared rays at ordinary times or during heat radiation, thereby contributing to health promotion.

The LED heat treatment structure according to the embodiment of the present invention has been described above. While the embodiments employed in the present invention have been described using specific conditions, these descriptions are for illustrative purposes only, and modifications and changes may be made without departing from the spirit and scope of the following claims. .

200: heat sink P: heat dissipation frame
210: LED module seating plate 221, 222: outer wall
231, 232: bulkhead 223, 224: hollow part
233: open groove

Claims (18)

In the heat sink for the LED luminaire to be installed in the LED luminaire,
LED module seating plate on which the LED module is seated, a pair of outer walls connected to the LED module seating plate to form the outer circumferential surface of the outer wall, and a pair of partition walls interconnecting the LED module seating plate and the outer wall in the center Includes a heat dissipation frame,
The outer wall is formed with at least two hollow parts extending in the longitudinal direction to secure a predetermined space portion, LED partitions, characterized in that at least one opening groove extending in the longitudinal direction through which the outside air is ventilated between the partition wall is formed. For heat sink.
The method of claim 1,
The outer wall is a heat sink for LED lighting, characterized in that the outer circumferential surface forms a symmetrical appearance of the half moon type.
The method of claim 1,
The LED module seating plate further comprises an LED module insertion groove for inserting the LED module, the LED module insertion groove is a heat sink for LED lighting, characterized in that it has a locking piece for fixing the LED module.
The method of claim 1,
The open groove is formed of a first space on the inside and a second space on the outside, the width of the first space is greater than the width of the second space, the heat sink for LED lighting.
The method of claim 4, wherein
And the first space and the second space have a rectangular cross section.
The method of claim 4, wherein
The width of the first space is the same as the width of the second space heat sink for LED lighting.
The method of claim 1,
The heat dissipation frame is a heat sink for LED lighting, characterized in that made of an aluminum material extrusion.
The method of claim 1,
Heat sink for LED lighting, characterized in that at least one projection is formed along the longitudinal direction of the outer peripheral surface of the heat dissipation frame.
The method of claim 1,
The outside of the heat dissipation frame is a heat sink for LED lighting, characterized in that the ceramic paint coating layer further comprises a fine powder tourmaline.
In the LED luminaire comprising an LED module consisting of a PCB board mounted with a plurality of LEDs,
The heat sink according to any one of claims 1 to 9,
An LED module seated on the LED module seating plate of the heat sink;
A cap made of a hemispherical shape and an elastic member and fitted into a cap insertion groove at an upper portion of the heat sink;
LED fixtures comprising a fixing cover for fixing the both ends of the heat sink and the cap.
The method of claim 10,
The fixing cover is an LED lamp, characterized in that fixed by at least one coupling bolt nut coupled to the vertical to the heat sink in the open groove.
The method of claim 11,
The fixing cover is an LED lamp, characterized in that the fixing by inserting the auxiliary material in the first space and the screw to the auxiliary by using the width difference between the first and second space constituting the opening groove.
The method of claim 10,
And the fixing cover is fixed by at least one or more coupling bolts vertically coupled to the heat sink in the open groove.
The method of claim 13,
The fixing cover is an LED luminaire, characterized in that is fixed in a manner of screwing without the width difference of the first and second space constituting the opening groove.
The method of claim 10,
The fixing cover is an LED luminaire, characterized in that fixed by the coupling bolt horizontally coupled to the heat dissipation frame in the open groove.
16. The method of claim 15,
And the fixing cover is additionally fixed by a second coupling bolt which is horizontally coupled to the heat dissipation frame in at least two hollow portions.
The method of claim 10,
And the heat sink is fixed to the ceiling by at least one support coupling bolt nut coupled to the heat sink in a vertical direction with respect to the heat sink.
The method of claim 10,
And the heat sink is fixed to the ceiling by at least one support coupling bolt coupled to the heat sink vertically in the open groove.

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