KR20130075025A - Led illumination device - Google Patents

Abstract

PURPOSE: A LED lighting device compulsorily sends inflow air from an air inlet to a power supply unit, and thus increases efficiency of heat dissipation. CONSTITUTION: An optical source section (110) comprises a light emitting surface. The light emitting surface is mounted with LED emitting light to the front A heat sink portion (120) emits heat of the optical source section. A blower (150) ejects air flowed in from an air inlet through an air diffuser. A housing forms an installation space of the blower and the heat sink portion.

Description

LED lighting device {LED ILLUMINATION DEVICE}

The present invention relates to an LED lighting apparatus using an LED as a light source, and more particularly, to an LED lighting apparatus having a blowing flow path for sucking air from the front and discharging the air to the front.

In general, the lighting device is used to provide light or to irradiate the object to convert the electrical energy into light energy to identify the object indoors or outdoors. Recently, the lighting device is semi-permanent, low power consumption and high efficiency illuminance. Lighting devices using LEDs (light emitting diodes) can be obtained for various uses.

LED lighting devices have advantages such as fast processing speed and low power consumption, and are increasingly used due to high environmental efficiency and energy efficiency. In addition, the LED lighting device has been in the limelight as a lighting lamp because 60 to 80% of the power is reduced, a semi-permanent life of 50,000 hours or more, and no glare occurs.

However, the LED lighting device has a problem in that the efficiency of the LED is reduced if the heat generated by the LED is not discharged or removed smoothly, and the life of the LED is shortened when used continuously for a long time.

In order to solve this problem, attempts to increase the heat dissipation efficiency by installing a heat dissipation fin or a blower means in the LED lighting device is continuing.

1A and 1B illustrate a conventional LED lighting apparatus, FIG. 1A is a cross-sectional view of a conventional LED lighting apparatus, and FIG. 1B is a bottom view of the LED lighting apparatus illustrated in FIG. 1A.

As shown in FIGS. 1A and 1B, the conventional LED lighting apparatus 10 includes a substrate 14a in which the LEDs 14 are installed in a circular shape, and a heat sink releasing heat generated from the LEDs 14. 13), a blower means 12 for generating a flow of air to dissipate the heat sink 13, a power supply unit 16 mounted with a component for supplying power to the LED 14, The cover 15 is attached to the front surface of the LED 14 and emits light to the outside, and a housing 11 for receiving the blowing means 12, the heat sink 13 and the like.

An air inlet IN is formed between the outer surface 13b of the heat sink 13 and the inner surface of the housing 11, and air is discharged from the inner side surface 13a of the central portion of the heat sink 13. The discharge part OUT is formed.

At this time, the blowing means 12 injects air from the air inlet (IN) located around the light source unit including the LED 14 to discharge the air through the air discharge unit (OUT) located in the center of the light source Done. According to this air flow, cold air introduced from the outside becomes heat after being heat-exchanged with the heat sink 13, and is discharged to the outside through the air outlet OUT.

However, the conventional LED lighting device 10 has the following problems.

First, since the conventional LED lighting device 10 has an air outlet (OUT) is formed in the center part of the air discharged through the air outlet (OUT) (F2) is blown again through the air inlet (IN) Since it flows into (12), the heat radiation efficiency is reduced.

That is, as shown in Figure 1b, the conventional LED lighting device 10 is the air discharged through the air discharge unit (OUT) because both the air inlet (IN) and the air discharge portion (OUT) is shown on the bottom view Has a structure that is easy to be introduced again through the air inlet (IN).

Secondly, in the conventional LED lighting apparatus 10, since the air discharged through the air discharge unit OUT is discharged to the front of the light source unit, the temperature of the illumination object is increased by the air F1 discharged downward. In particular, when the conventional LED lighting device 10 is used as an exhibition lighting (for example, MR or PAR), there is a problem that the temperature of the display object is increased, which may adversely affect the display object.

In addition, when a person is positioned under the conventional LED lighting apparatus 10, there is a problem that heated air is transmitted to the user, which may cause discomfort.

Third, the conventional LED lighting device 10 has a configuration to suck the air introduced from the air inlet (IN) to the blowing means 12, so that the power supply 16 is located directly above the blowing means 12 Even if there is a problem that can not sufficiently dissipate heat generated from the power supply unit 16. As described later, the decrease in heat dissipation efficiency of the power supply unit 16 can be confirmed through the experimental examples of FIGS. 13 (b) and 13 (d).

Therefore, in order to improve the heat dissipation efficiency, there is a need for an LED lighting apparatus having a form different from that of the flow path structure used in the conventional LED lighting apparatus 10.

The present invention has been made to solve at least some of the problems of the prior art as described above, and an object of the present invention is to provide an LED lighting device excellent in heat dissipation efficiency of the LED and the heat sink.

In addition, an object of the present invention is to provide an LED lighting device having a structure in which the air discharged through the air discharge unit does not flow back into the air inlet.

In addition, an object of the present invention is to provide an LED lighting device that does not provide a heated object to the illumination object or the user.

In addition, an object of the present invention is to provide an LED lighting device excellent in heat dissipation efficiency of the power supply.

In addition, an object of the present invention is to provide an LED lighting device having a structure capable of effectively dissipating heat generated from the LED through the heat sink and / or the housing.

As one aspect for achieving the above object, the present invention includes a light source unit having a light emitting surface mounted with an LED for irradiating light forward; A heat sink disposed in contact with the light source unit and dissipating heat from the light source unit; Blowing means for discharging air introduced from an air inlet part through an air discharge part to discharge heat generated from the light source part; And a housing having a space in which the heat sink and the blowing means are installed, wherein the air inlet is positioned to suck air from the front, and the air discharge part is positioned around the air inlet. It provides an LED lighting device configured to discharge the air in the forward and inclined direction to be away from the air inlet.

Preferably, the heat sink portion may include a guide portion inclined so that the discharged air discharges the air in an inclined direction.

Also preferably, the air exhaust may be installed so as not to be exposed on the plane viewed from the front.

Preferably, the heat sink portion has an air inlet opening through which air is introduced from the outside, an air passage opening through which air introduced from the air inlet opening is introduced into the blowing means, and air discharged from the blowing means. A discharge opening may be provided. At this time, the air inlet opening may be provided with a flow path forming member for forming a spiral flow path.

Also preferably, the heat sink may be divided into a first heat sink and a second heat sink.

More preferably, the first heat sink may be provided with the air inlet opening, the second heat sink may be provided with the air passage opening in a central portion thereof, and the air exhaust opening may be provided at a circumference thereof. In this case, the air passing through the air discharge opening may be discharged to the outside after contacting one surface of the first heat sink.

Also preferably, the blowing means may be installed in the second heat sink.

On the other hand, the LED lighting apparatus according to an aspect of the present invention, the power supply unit is further provided with a component for supplying power to the light source unit; wherein the blowing means is forcibly blowing the introduced air to the power supply unit Can be.

Preferably, the light emitting surface is formed in a circular shape, the air inlet is located in the center of the light emitting surface, the air discharge portion may be disposed around the air inlet.

Alternatively, the air inlet may be arranged around the light emitting surface, and the air outlet may be arranged around the air inlet.

Preferably, the housing is formed of a metal material and may be in contact with at least a portion of the heat sink portion.

More preferably, an air discharge passage communicating with the air discharge portion may be formed between the housing and the heat sink portion.

Preferably, the heat sink may include a heat dissipation fin for increasing the contact area with the flowing air.

In addition, the LED lighting apparatus according to an aspect of the present invention may further include a flow changing unit for changing at least one of a direction and a speed of the flow when the incoming air flows into the heat sink.

Preferably, the flow change portion may include a flow path switching member for guiding the direction of the air to change the direction of the heat sink portion, the cross-sectional area from the air inlet side toward the inside of the housing to increase the flow rate of the incoming air This increasing flow rate increasing member can be provided.

According to an embodiment of the present invention having the configuration as described above, the air inlet portion is configured to suck air from the front, the air outlet portion is positioned around the air inlet portion and the front and the light so that the discharged air away from the air inlet portion By configuring the air to be discharged in the photographic direction, it is possible to prevent the air discharged through the air discharge portion from being introduced again into the air inlet portion, and thus, the heat dissipation efficiency of the LED and the heat sink can be remarkably excellent. In addition, by allowing the air discharged from the air discharge portion to be discharged to the inclined side with respect to the front, there is an effect that it is possible to prevent the rise of the temperature of the illumination object due to the discharge air or the discomfort perceived by the user.

In addition, according to an embodiment of the present invention, by forcibly blowing air introduced from the air inlet to the power supply unit, a strong air flow is formed in the power supply unit, thereby obtaining an effect of increasing heat radiation efficiency of the power supply unit.

In addition, according to an embodiment of the present invention, the heat sink is divided into a first heat sink and a second heat sink to form an air flow path, so that both the incoming air and the discharged air pass through the heat sink part. The effect of maximizing thermal efficiency can be obtained.

In addition, according to one embodiment of the present invention, by providing a blade-shaped flow path forming member for generating turbulent flow or vortex in the air inlet opening it can be obtained that the heat dissipation efficiency of the heat sink can be greatly improved.

And, according to an embodiment of the present invention, when the incoming air is introduced into the heat sink unit, by providing a flow change unit for changing at least one of the direction and speed of the flow, heat exchange between the incoming air and the heat sink unit By increasing the efficiency, there is an effect that the heat dissipation is excellent.

Figure 1a is a cross-sectional view of a conventional LED lighting device.
Figure 1b is a bottom view of the LED lighting device shown in Figure 1a.
2 is a cross-sectional view of the LED lighting apparatus according to an embodiment of the present invention.
3 and 4 are cross-sectional views showing a modified embodiment of the LED lighting apparatus shown in FIG.
5 is a cross-sectional view of the LED lighting apparatus according to another embodiment of the present invention.
6a and 6b are exploded perspective view of the LED lighting apparatus according to another embodiment of the present invention, Figure 6a is an exploded perspective view seen from the bottom, Figure 6b is an exploded perspective view seen from the top.
Figure 7 is a cross-sectional view showing a coupling structure of the LED lighting apparatus shown in Figures 6a and 6b.
8 is a cross-sectional view showing a flow path structure of the LED lighting apparatus shown in FIGS. 6A and 6B.
Figure 9a and 9b is an exploded perspective view of the LED lighting apparatus according to another embodiment of the present invention, Figure 9a is an exploded perspective view seen from the bottom, Figure 9b is an exploded perspective view seen from the top.
10 is a cross-sectional view showing a coupling structure of the LED lighting apparatus shown in Figs. 9a and 9b.
FIG. 11 is a cross-sectional view showing a flow path structure of the LED lighting apparatus shown in FIGS. 9A and 9B.
12 is a view illustrating a temperature distribution when viewed from the bottom of the conventional LED lighting apparatus shown in FIGS. 1A and 1B and the LED lighting apparatus according to an embodiment of the present invention illustrated in FIGS. 9A to 11.
(a) is a photograph showing the temperature distribution by the thermal imaging camera of the LED lighting apparatus according to an embodiment of the present invention shown in Figures 9a to 11,
(b) is a photograph showing the temperature distribution by the thermal imaging camera of the conventional LED lighting apparatus shown in Figures 1a and 1b,
(c) and (d) are temperature distribution graphs when the temperature distributions of the photographs shown in (a) and (b) are shown from left to right along the center line.
FIG. 13 illustrates a temperature distribution when viewed from the front of the conventional LED lighting apparatus shown in FIGS. 1A and 1B and the LED lighting apparatus according to an embodiment of the present invention illustrated in FIGS. 9A to 11.
(a) is a photograph showing the temperature distribution by the thermal imaging camera of the LED lighting apparatus according to an embodiment of the present invention shown in Figures 9a to 11,
(b) is a photograph showing the temperature distribution by the thermal imaging camera of the conventional LED lighting apparatus shown in Figures 1a and 1b,
(c) and (d) are temperature distribution graphs when the temperature distributions of the photographs shown in (a) and (b) are shown from top to bottom along the center line, respectively.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Furthermore, the singular forms "a", "an," and "the" include plural referents unless the context clearly dictates otherwise.

In this specification, terms such as " comprise "," comprise ", and " have "mean that there exist features, numbers, steps, operations, elements, parts, And should not be construed to preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, the LED lighting apparatuses 100 and 200 according to an embodiment of the present invention will be described with reference to FIGS. 2 to 11.

First, as shown in FIGS. 2 to 4, the LED lighting apparatus 100 according to an embodiment of the present invention includes a light source unit 110, a heat sink unit 120, a blowing unit 150, and a housing 170. ), And may further include a power supply unit 160 and a cover unit 180.

First, the light source unit 110 includes an LED 112 for irradiating light forward. In this case, the LED 112 is mounted on a substrate 111 composed of a printed circuit board (PCB), a flexible PCB (FPCB), a metal PCB (MPCB), or the like. In addition, one surface of the light source 110, on which the light is irradiated from the LED 112, that is, the LED 112 is mounted, constitutes a light emitting surface.

In addition, the heat sink 120 is installed to be in contact with the light source 110, and is configured to discharge heat from the light source 110. That is, the heat sink 120 is configured to be in contact with the substrate 111 to emit heat from the LED 112 to the air.

In addition, as shown in FIGS. 2 to 4, the heat sink 120 may include a heat dissipation fin 125 for increasing the contact area with the flowing air. However, the heat dissipation fins 125 are not essential to the heat sink 120, and as shown in FIGS. 6 to 11, in the case where sufficient heat dissipation performance can be ensured, the heat dissipation fins 125 are not formed. Configuration is also possible. On the contrary, in the case of the embodiment illustrated in FIGS. 6 to 11, the heat dissipation fins 125 may be formed as in the embodiment illustrated in FIGS. 2 to 4.

As shown in FIG. 2, the heat sink 120 forms an air inlet A through which air is introduced into the inner surface 121 of the heat sink 120, and the heat sink 120. The air discharge portion (D) is formed between the outer surface 122 of the inner surface and the inner surface of the housing 170.

In addition, the blowing means 150 is an upper portion of the heat sink 120 to discharge the air introduced from the air inlet (A) through the air discharge unit (D) in order to discharge the heat generated in the light source unit (110) Is placed on.

At this time, the air inlet (A) is positioned to suck the air (F _IN ) from the front of the light emitting surface (that is, in the case of Figure 2), the air outlet (D) is the air inlet (A) Is located around. In addition, the air discharge unit (D) is configured to discharge the air in a forward and inclined direction so that the discharge air (F _OUT ) is far from the air inlet (A).

In this case, the heat sink 120 may include a guide part G inclined toward an outer direction so that the discharged air F _OUT is discharged in a forward and inclined direction.

Therefore, the air F _IN introduced through the air inlet part A exchanges heat with the heat sink 120, and then passes through the air blowing unit 150 to the outer surface of the housing 170 and the heat sink 120. After moving along the air discharge passage formed between the 122) is discharged to the outside through the air discharge (D).

At this time, the air (F _OUT ) discharged through the air discharge unit (D) is discharged in a direction away from the air inlet (A) having a slope with respect to the front by the guide portion (G).

In addition, in the LED lighting apparatus 100 shown in FIGS. 2 to 4, the light emitting surface on which the LEDs 112 are installed is formed in a circular shape, and an air inlet part A is disposed at the center of the light emitting surface, and the outside of the light emitting surface is provided. In the air discharge portion D. That is, the LED lighting apparatus 100 illustrated in FIGS. 2 to 4 has a configuration in which the air inflow portion A, the light emitting surface, and the air exhaust portion D are disposed from the center toward the outside.

In addition, the LED lighting apparatus 100 according to an embodiment of the present invention is installed in a lighting installation unit CE such as a ceiling or a wall, and the air discharge unit D and the air inlet unit A are indoor spaces (outside). Space) to be exposed to the side is preferably configured to smooth the flow of inlet air (F _IN ) and exhaust air (F _OUT ). In this case, the step 172 of the housing 170 may be configured to contact the lighting installation unit CE, and a separate structure for lighting installation may be mounted between the lighting installation unit CE and the housing 170. Can be.

Meanwhile, in order to minimize the inflow of the air F _OUT discharged through the air discharge unit D into the air inlet unit A, the air discharge unit D is disposed on a plane viewed from the front (that is, light emission). When viewed from the lower side to the upper side) may be installed so as not to be exposed.

In addition, the housing 170 forms a space in which the heat sink 120, the blower 150, and the power supply unit 160 are installed. The housing 170 may be formed of a metal material in order to discharge heat generated therein to the outside. When the housing 170 is made of a metal material having high thermal conductivity such as aluminum, the heat radiation effect is further increased.

On the other hand, the power supply unit 160 is configured to supply power to the LED 112 of the light source unit 110, SMPS (Switch mode power supplies) may be used to control the power supply.

At this time, the power supply unit 160 is preferably installed on the upper side of the blowing means 150 is configured to radiate heat by the air supplied from the blowing means 150. In this case, as shown in Figures 2 to 4, the LED lighting device 100 according to an embodiment of the present invention, the air F _IN is introduced to the power supply unit 160 by the blowing means 150 Since it is forcibly blown, the heat dissipation effect of the power supply unit 160 is excellent.

The cover unit 180 may include a lens or the like to provide light from the light source unit 110 to the object to be irradiated, and may be made of a transparent material.

On the other hand, the LED lighting device 100 shown in Figures 3 and 4 is the same as the configuration of the embodiment shown in Figure 2, except that it further includes a flow changing unit 190. Therefore, only the configuration of the flow change unit 190 having a difference in order to avoid unnecessary description.

The flow change unit 190 may be installed to change at least one of a direction and a speed of flow when the air F _IN flows into the heat sink 120.

As shown in FIG. 3, the flow change unit 190 may be in contact with the heat sink 120 or the heat dissipation fin 125 by changing the inflow air F _IN toward the heat sink 120. It may include a flow path switching member 191 for guiding the movement of the air.

In addition, the flow change unit 190, as shown in Figure 4, the air inlet (A) to increase the flow rate when the inlet air (F _IN ) moves from the air inlet (A) to the heat sink (120) side It may be provided with a flow rate increasing member 192, the cross-sectional area is increased toward the heat sink 120 in the). Of course, as shown in FIG. 4, it is also possible to provide both the flow path switching member 191 and the flow rate increasing member 192 as the flow change unit 190.

Next, with reference to Figure 5 looks at the LED lighting apparatus 200 according to another embodiment of the present invention.

The LED lighting apparatus 200 shown in FIG. 5 has an air inlet A installed around the light emitting surface on which the LED 212 is installed, in contrast to the embodiment shown in FIG. 2. It has the same configuration as in the case of the embodiment performed on. Therefore, in order to avoid unnecessary duplication, descriptions of the same or similar components will be omitted, and a configuration corresponding to the LED lighting apparatus 100 shown in FIG. 2 will be indicated by adding '100' to the reference numerals.

In the LED lighting apparatus 200 illustrated in FIG. 5, a light emitting surface on which the LEDs 212 are installed is disposed at the center of the LED lighting apparatus 200, and an air inlet part A is formed around the air inlet unit. The air exhaust part D is formed outside of A).

Of course, even in the case of the LED lighting device 200 shown in Figure 5, the air discharge unit (D) discharges the air in the direction inclined forward and away from the air inlet (A) to the discharge air (F _OUT ) To this end, the heat sink 220 may be provided with a guide portion (G) is inclined toward the outside direction. Therefore, the air F _IN introduced through the air inlet part A exchanges heat with the heat sink 220 and then passes through the blowing means 250 to the outer surfaces of the housing 270 and the heat sink 220. After moving along the air discharge passage formed between the 222 is discharged to the outside through the air discharge unit (D).

Meanwhile, in the LED lighting apparatus 100 illustrated in FIGS. 2 to 4, since the air inlet portion A is formed at the center of the light emitting surface of the light source unit 110, a display light, for example, MR or PAR, etc. In case of use, it may be difficult to intensively illuminate the exhibition.

However, since the light emitting surface of the light source unit 110 is formed in the center of the LED lighting apparatus 200, the LED lighting apparatus 200 shown in FIG. 5 may be more effective when the spot lighting is needed.

As described above, the LED lighting apparatuses 100 and 200 illustrated in FIGS. 2 to 5 may exchange heat with the heat sinks 120 and 220 through the air F _IN introduced through the air inlet unit A. After moving along the air discharge flow path formed between the housing (170, 270) and the outer surface (122, 222) of the heat sink (120, 220) through the air blowing means (150, 250) Since it has a configuration that is discharged in the direction inclined outward with respect to the front through, the air (F _OUT ) discharged through the air discharge unit (D) is not introduced into the air inlet (A) again, thereby LED (112. 212) and the heat dissipation efficiency of the heat sinks 120 and 220 are remarkably excellent. In addition, the LED lighting device (100, 200) shown in Figures 2 to 5 has the advantage that it is possible to prevent the temperature rise of the object to be illuminated due to the exhaust air (F _OUT ) or the discomfort to the user compared to the prior art. .

Next, referring to Figures 6 to 8, look at the LED lighting apparatus 100 according to another embodiment of the present invention.

In the case of the embodiment shown in Figures 6 to 8, as in the case of the embodiment shown in Figure 2, the light emitting surface is formed in a circular shape, the air inlet (A) is located in the center of the light emitting surface, the circumference of the light emitting surface It has a configuration in which the air discharge portion (D) is formed.

However, in the case of the LED lighting device 100 shown in Figures 6 to 8 there is a difference in that the heat sink 120 is composed of two members (130, 140).

Therefore, in order to avoid unnecessary overlapping description, the same reference numerals are given to the same or similar components and detailed description thereof will be omitted.

In the LED lighting apparatus 100 shown in FIGS. 6 to 8, the heat sink 120 has an air inlet opening 135 through which air is introduced from the outside, and air introduced from the air inlet opening 135. The air passage opening 145 to be introduced into the blowing means 150, and the air discharge opening 142 through which the air discharged from the blowing means 150 is discharged.

That is, the heat sink 120 has a sufficient flow path through which air flows inside the heat sink 120 in order to increase heat dissipation performance. For this purpose, the first heat sink 130 and the second heat sink ( 140 can be divided into.

At this time, the first heat sink 130 is provided with the air inlet opening 135, the second heat sink 140 is provided with the air passage opening 145 in the center, the air outlet opening 142 may be provided.

In addition, the first heat sink 130 has the air inlet opening 135 in the center, and the light source unit mounting surface on which the substrate 111 of the light source unit 110 is installed around the air inlet opening 135. An air guide surface 131a having 131b and configured to guide air F _OUT discharged around the outermost portion in an inclined direction is formed.

In addition, the air inlet opening 135 may include a flow path forming member 136 forming a spiral flow path. The flow path forming member 136 allows the air flowing from the air inlet A to form a spiral flow path so as to become turbulent or vortex to allow sufficient heat transfer with the heat sink 120. Therefore, the heat dissipation efficiency can be improved through the flow path forming member 136.

As an example, the flow path forming member 136 may be composed of a plurality of blades attached to have an inclined or helical shape between the central axis 132 and the inner surface 133.

In addition, the second heat sink 140 has a circumference of the blocking plate 143 and the blocking plate 143 which are formed such that air introduced from the air inlet opening 135 is not directly introduced into the blowing means 150. An air passage opening 145 installed at the air inlet opening 135 to allow air introduced from the air inlet opening 135 to be introduced into the blowing means 150, and air discharged from the blowing means 150 is discharged to the air discharge unit D; It is provided with an air discharge opening 142 that passes through.

The blower 150 is mounted on the blocking plate 143 while being spaced apart from the blocking plate 143.

In addition, at least a portion of the heat sink 120 may be configured to be in contact with the metal housing 170. For example, the outer surface 141 of the second heat sink 140 is configured to be in contact with the housing 170 so that the heat generated from the LED 112 may pass through the heat sink 120 to form a large area of the housing 170. By heat dissipation through it is possible to increase the heat dissipation effect.

6 to 8, the cover unit 180 may include a lens 181 configured to irradiate light from the light source unit 110 to the outside.

In addition, various components 161 and 162 for supplying power to the light source unit 110 and / or the blowing unit 150 are mounted in the power supply unit 160. ) May be mounted in a space (E of FIG. 7) positioned above the power supply unit 160.

In addition, the housing 170 includes a protrusion 173 for mounting a tall component or forming a space on an upper portion of the housing body 171, and a connector pin 175 connected to an external power source on the upper portion of the protrusion 173. ) Can be installed. In addition, the housing 170 may be provided with a groove 172 for assembly, and may be provided with a closing member 178 to block the groove 172 after the assembly is made.

7, the LED lighting device 100 according to an embodiment of the present invention is the air inlet (A), the space (B) formed between the blowing means 150 and the power supply unit 160, and blowing An air discharge flow path space C formed between the side of the means 150 or the heat sink 120 and the housing 170, and the air discharge portion (D), the inflow from the air inlet (A) The compressed air is discharged to the air discharge unit (D) via the space (B) and the space (C).

This flow path structure will be described in more detail with reference to FIGS. 6A, 6B, and 8.

Air is introduced into the air inlet opening 135 corresponding to the air inlet A through the inlet 182 formed at the center of the cover 180, and the air F _IN is introduced into the air inlet 135. At this time, the spiral channel is formed by the channel forming member 136. Thereafter, the air flows through the space (air discharge flow path) between the blocking plate 143 and the light source unit installation surface 131b, passes through the air passage opening 145, and then flows into the blowing means 150. The air discharged from the blower means 150 collides with the power supply unit 160 and then passes through the air discharge passage formed between the side of the blower means 150 / heatsink unit 120 and the housing 170. It is discharged to the air discharge unit (D) through the discharge opening 142. At this time, the discharge air (F _OUT ) is in contact with the air guide surface 131a, that is, one surface of the first heat sink 130 again and then outwardly forward through the air guide surface 131a corresponding to the guide portion (G). It is discharged in an inclined direction.

As described above, in the embodiment illustrated in FIGS. 6 to 8, the incoming air F _IN is between the air inlet opening 135, the blocking plate 143, and the light source unit mounting surface 131b of the heat sink 120. Space corresponding to the space, the air passage opening 145, the space between the side surface of the heat sink 120 and the housing 170 (air discharge passage), the air discharge opening 142, and the air discharge portion (D) Since sufficient heat exchange with the heat sink 120 while passing through the guide surface 131a, the heat dissipation effect of the LED lighting device 100 is extremely excellent. Furthermore, since the air discharged from the blowing means 150 collides with the power supply unit 160 side, the heat dissipation effect of the power supply unit 160 is also excellent.

Next, with reference to FIGS. 9 to 11 looks at the LED lighting apparatus 200 according to another embodiment of the present invention.

9 to 11, as in the case of the embodiment illustrated in FIG. 5, a light emitting surface on which the LED 212 is installed is disposed at the center of the LED lighting apparatus 200, and an air inlet is formed around the LED lighting apparatus 200. (A) is formed, and the air discharge part (D) is formed outside the air inlet part (A).

That is, in the embodiment shown in FIGS. 9 to 11, when the light is emitted from the center to the outside, the light emitting surface, the air inlet part A, and the air discharge part D are installed, and thus the flow path structure and the heat sink part 120 are provided. ) Has a similar configuration to the case of the embodiment shown in Figures 6 to 8 except that there is a slight difference in the configuration.

Therefore, in order to avoid unnecessary duplication, descriptions of the same or similar components to those of the embodiment shown in FIGS. 6 to 8 will be omitted, and the configuration corresponding to the LED lighting apparatus 100 shown in FIGS. 6 to 8 will be omitted. The reference numeral '100' is added to the display.

In the LED lighting apparatus 200 illustrated in FIGS. 9 to 11, the heat sink 220 has an air inlet opening 235 through which air is introduced from the outside, and air introduced from the air inlet opening 235. The air passage opening 245 to be introduced into the blowing means 250 and the air discharge opening 242 through which the air discharged from the blowing means 250 is discharged.

That is, the heat sink 220 has a sufficient flow path through which air flows inside the heat sink 220 in order to increase heat dissipation performance. For this purpose, the first heat sink 230 and the second heat sink ( 240 may be divided into. At this time, the first heat sink 230 is provided with the air inlet opening 235, the second heat sink 240 is provided with the air passage opening 245 in the center, the air exhaust opening around 242 may be provided.

In addition, the first heat sink 230 has a light source unit mounting surface 231b in which a substrate 211 of the light source unit 210 is installed at the center, and an air inlet opening 235 around the light source unit mounting surface 231b. Is provided, the air guide surface 231a for guiding so that the air (F _OUT ) discharged around the outermost in the inclined direction is formed.

The air inlet opening 235 may include a flow path forming member 236 that forms a spiral flow path. The flow path forming member 236 may be composed of a plurality of blades attached to have an inclined or helical shape between the inner surface 232 and the outer surface 233.

In addition, the second heat sink 240 has an air passage opening 245 for allowing the air introduced from the air inlet opening 235 to the air blowing means 250, and discharged from the air blowing means 250. It is provided with an air discharge opening 242 passing before the air to be discharged to the air discharge portion (D). And, the blowing means 250 is mounted on the upper portion of the second heat sink 240.

In addition, at least a portion of the heat sink 220 may be configured to contact the housing 270 of a metal material. For example, the outer surface 241 of the second heat sink 240 is configured to be in contact with the housing 270 so that the heat generated from the LED 212 is transmitted to the large area of the housing 270 via the heat sink 220. By heat dissipation through it is possible to increase the heat dissipation effect.

Referring to FIG. 10, the LED lighting device 200 according to an embodiment of the present invention includes an air inlet A, a space B formed between the air blowing unit 250 and the power supply unit 260, and a heat. An air discharge passage space C and an air discharge portion D formed between the side surface of the sink 220 and the housing 270 may be provided, and the air introduced from the air inlet portion A may be a space B. And through the space (C) are discharged to the air discharge (D).

This flow path structure will be described in more detail with reference to FIGS. 9A, 9B, and 11.

Air is introduced through the air inlet opening 235 corresponding to the air inlet A, and the introduced air F _IN forms the spiral flow path by the flow path forming member 236 at the air inlet opening 235. do. Thereafter, the air passes through the air passage opening 245 and then flows into the blowing means 250. The air discharged from the blowing means 250 collides with the power supply unit 260 and passes through the air discharge passage formed between the side of the heat sink 220 and the housing 270, and then opens the air discharge opening 242. It is discharged through the air discharge unit (D). At this time, the discharge air (F _OUT ) is in contact with the air guide surface 231a, that is, one surface of the first heat sink 230 and then outwardly forward through the air guide surface 231a corresponding to the guide portion (G). It is discharged in an inclined direction.

Thus, in the embodiment shown in Figures 9 to 11, the incoming air (F _IN ) is the air inlet opening 235 of the heat sink 220, air passage opening 245, heat sink 220 Sufficient heat exchange with the heat sink 220 while passing through the space between the side of the housing and the housing 270 (air exhaust passage), the air exhaust opening 242, and the air guide surface 231a corresponding to the air exhaust portion D. Since the heat radiation effect of the LED lighting device 200 is extremely excellent. In addition, since the air discharged from the blowing means 250 collides with the power supply unit 260 side, there is an advantage that the heat dissipation effect of the power supply unit 260 is also excellent.

In addition, since the light emitting surface of the light source unit 210 is formed at the center of the LED lighting apparatus 200, the LED lighting apparatus 200 shown in FIGS. It may be more effective than the LED lighting device 100 shown in FIG. Of course, it does not exclude that the LED lighting apparatus 100 shown in FIGS. 2 to 4 and 6 to 8 is used as exhibition lighting.

12 and 13, looks at the heat radiation effect of the LED lighting apparatus according to an embodiment of the present invention.

12 and 13 are temperatures when viewed from the bottom and the front of the conventional LED lighting apparatus shown in FIGS. 1A and 1B and the LED lighting apparatus according to an embodiment of the present invention shown in FIGS. 9A to 11, respectively. As shown in the distribution, (a) and (b) are the LED lighting apparatus according to the embodiment of the present invention shown in Figures 9a to 11, respectively, and the thermal imaging camera of the conventional LED lighting apparatus shown in Figure 1a (C) and (d) show the temperature distribution of the photographs shown in (a) and (b), from left to right or from top to bottom, respectively, along the center line. It is a distribution graph.

As can be seen in Figures 12 and 13, the LED lighting device 200 according to an embodiment of the present invention (see Fig. 12 (a) / (c) and 13 (a) / (c)) is air Compared with the conventional LED lighting device 10 shown in FIGS. 1A and 1B by preventing the air discharged through the discharge portion from affecting the air introduced through the air inlet and adopting the efficient cooling flow path structure as described above. It can be seen that the average temperature and the maximum temperature are low.

That is, in the case of the LED lighting apparatus according to an embodiment of the present invention, the maximum temperature is about 50 ° C (see FIGS. 12 (c) and 13 (c)), but in the conventional case, the maximum temperature is about 60 ° C (Fig. 12 (d) and FIG. 13 (d)}, it can be seen that a difference of approximately 10 ° C occurs.

In addition, as can be seen through Figure 13, the LED lighting device (100, 200) according to an embodiment of the present invention is forced through the blowing means (150, 250) inlet air to the power supply (160, 260) Since the power supply unit (160,260) is cooled by supplying to the heat dissipation effect of the power supply unit (160,260) can also be confirmed that compared to the conventional LED lighting device (10).

While the present invention has been particularly shown and described with reference to particular embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention as defined by the following claims I would like to make it clear.

100, 200 ... LED lighting 110, 210 ... light source
111, 211 ... Substrate 112, 212 ... LED
113 ... Inlet opening 120, 220 ... Heat sink
125, 225 ... Heat sink fins 130, 230 ... First heat sink
131a, 231a ... Air guide surface 131b, 231b ... Light source mounting surface
135, 235 ... Air inlet openings 136, 236 ... Flow forming member
140, 240 ... 2nd heat sink 142, 242 ... Air exhaust opening
145, 245 ... Air passage opening 150, 250 ... Blowing means
160, 260 ... Power supply 170, 270 ... Housing
171, 271 ... Housing body 172, 272 ...
180, 280 ... Cover part 181, 281 ... Lens
182 ... inlet 190 ... flow changer
191 ... Euro-switching member 192 ... Flow rate increasing member
A ... Air inlet D ... Air outlet
CE ... Lighting installation G ... Guide section
F _IN ... inlet air F _OUT ... exhaust air

Claims (18)

A light source unit having a light emitting surface on which an LED is irradiated forward;
A heat sink disposed in contact with the light source unit and dissipating heat from the light source unit;
Blowing means for discharging air introduced from an air inlet part through an air discharge part to discharge heat generated from the light source part; And
A housing having a space in which the heat sink and the blower are installed;
/ RTI >
The air inlet is positioned to suck air from the front,
And the air discharge unit is positioned around the air inlet and configured to discharge air in a forward and inclined direction so that the air discharged away from the air inlet. The method of claim 1,
The heat sink unit LED lighting apparatus characterized in that it comprises a guide portion inclined so that the discharged air discharges the air in the inclined direction and the front. The method of claim 1,
LED lighting device, characterized in that the air discharge is installed so as not to be exposed on the plane viewed from the front. The method of claim 1,
The heat sink unit includes an air inlet opening through which air is introduced from the outside, an air passage opening through which air introduced from the air inlet opening is introduced into the blowing means, and an air outlet opening through which air discharged from the blowing means is discharged. LED lighting apparatus characterized in that it comprises. 5. The method of claim 4,
The air inlet opening is an LED lighting device comprising a flow path forming member for forming a spiral flow path. 5. The method of claim 4,
The heat sink is divided into a first heat sink and a second heat sink LED lighting apparatus, characterized in that formed. The method according to claim 6,
The first heat sink has the air inlet opening,
The second heat sink is provided with the air passage opening in the center portion, the LED lighting device, characterized in that provided with the air exhaust opening around. The method of claim 7, wherein
The air passing through the air discharge opening is an LED lighting device, characterized in that discharged to the outside after contacting one surface of the first heat sink. The method according to claim 6,
LED lighting device, characterized in that the blowing means is installed on the second heat sink. The method of claim 1,
And a power supply unit mounted with a component for supplying power to the light source unit.
The blowing means is an LED lighting device, characterized in that forcibly blowing the introduced air to the power supply. The method of claim 1,
The light emitting surface is formed in a circular shape,
The air inlet is located in the center of the light emitting surface,
LED lighting device, characterized in that the air discharge is disposed around the air inlet. The method of claim 1,
The air inlet is disposed around the light emitting surface,
LED lighting device, characterized in that the air discharge is disposed around the air inlet. The method of claim 1,
The housing is formed of a metallic material, LED lighting apparatus, characterized in that in contact with at least a portion of the heat sink. The method of claim 13,
An LED lighting device, characterized in that the air discharge passage communicating with the air discharge portion is formed between the housing and the heat sink. The method of claim 1,
The heat sink is an LED lighting device, characterized in that it comprises a heat radiation fin for increasing the contact area with the flowing air. The method of claim 1,
A flow changing part for changing at least one of a direction and a speed of flow when the air introduced into the heat sink part;
LED lighting apparatus characterized in that it further comprises. 17. The method of claim 16,
The flow change unit LED lighting apparatus characterized in that it comprises a flow path switching member for guiding to change the direction of the air toward the heat sink. 17. The method of claim 16,
The flow altering unit LED lighting apparatus, characterized in that it comprises a flow rate increasing member to increase the cross-sectional area from the air inlet side toward the inside of the housing in order to increase the flow rate of the incoming air.

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