KR20150009056A - high-efficiency led lamp with heat pipe and heat-radiation liquid of heat and lamp appliances - Google Patents

Abstract

The present invention relates to an LED lamp and a lamp appliance using the same. In an LED lamp, multiple LED PCBs (12, 12′, 12″) where multiple LEDs (11) are mounted on a flat surface are entirely combined with a polygonal shape. Each heat pipe (15) is combined on the back surface of each LED PCBs (12, 12′, 12″). The heat pipe (15) includes an LED module assembly (10) connected to a heat sink (30) to radiate heat to the outside. An LED lamp according to the present invention includes a heat pipe for an LED PCB for mounting LEDs and a heat sink for discharging heat to the outside, thereby increasing heat radiation effect and the life of the LED. The LED lamp includes a base part, thereby simply and quickly performing lamp replacement in a streetlight, factory light and a security light. Each LED PCB is combined with a reflection cap in a range of 1 to 150 degree according to the purpose of a lamp at both ends of the LED PCB horizontally arranged, thereby easily obtaining light distribution characteristic suitable for the purpose of the lamp.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a high-efficiency LED lamp having a heat pipe and a heat dissipating device, and a lamp using the same. BACKGROUND OF THE INVENTION [0001]

The present invention relates to an LED lamp for an illuminator, and more particularly, to an improved LED lamp for facilitating installation and replacement of a lamp in a socket base type with an improved heat dissipating structure for enhancing light efficiency and durability of the LED.

The present invention also relates to an LED lamp that realizes the light distribution of a lamp such as a street lamp, a security lamp, and a factory using a reflector.

In recent years, there has been an increasing trend to use LEDs in lamps due to lower manufacturing costs of LED chipsets and superior power consumption and luminous efficiency compared to resistive lamps.

In particular, LED lamps have much higher luminous efficiency compared to resistive lamps compared to resistive lamps, so that they can obtain the required amount of light even at low voltage and are excellent in stability. Instead of conventional resistive lamps, LED lamps are also used for public lamps such as street lamps, security lamps, floodlights, The use of LED lamps is increasing, and various LED lamps used at home are being replaced by LED lamps. In order to obtain the brightness required for such LED lights, several LEDs are modularized.

However, the conventional LED lamp has a drawback in that it is relatively vulnerable to heat as compared with a light emitting device such as an incandescent lamp using a filament or a fluorescent lamp using a cathode ray because the light emitting portion has a high efficiency of converting power into light have. In other words, when the LED lamp is used for a long period of time, the semiconductor device is easily degraded due to thermal stress caused by its own heat generated from the light emitting device, thereby deteriorating its performance.

Accordingly, it is desired to improve the heat dissipation structure for effectively emitting heat generated from the LED lamp.

In addition, when an LED lamp is used as a security lamp or a street lamp, a single LED can not provide sufficient illumination for illumination. Therefore, it is common to mount a plurality of LEDs on a substrate and use a lens.

In the conventional LED lamp used as a security lamp or a street lamp, a plurality of modules including a plurality of LEDs are mounted on a reflector. In repair work, equipment such as a ladder must be used. It is required to improve the structure to make maintenance easier.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-described problems of the conventional LED lamps, in which substrates on which a plurality of LEDs are mounted are combined in a polygonal shape and housed in a glass tube together with a heat dissipating liquid, a heat pipe is coupled to each of the substrates, And an end of the heat sink is connected to the heat sink to provide an improved heat dissipation effect.

Another object of the present invention is to provide an LED lamp which can be used for replacement of existing street lamps, security lamps, and factory luminaires so that the LED lamp can be assembled to the reflector in a socket- Thereby providing a luminaire.

In order to achieve the above object, an LED lamp according to the present invention includes a plurality of LED PCBs having a plurality of LEDs mounted on a plane in a polygonal shape, and a heat pipe is coupled to a back surface of each LED PCB, And the heat pipe includes an LED module assembly connected to a heat sink for heat dissipation to the outside.

The LED PCBs are coupled at the opposite ends of the horizontally disposed LED PCB at a range of 1 DEG to 150 DEG, respectively, depending on the use of the lamp.

The LED module assembly is disposed in a glass tube and has a base that can be easily installed on the reflector.

A non-conductive heat dissipating liquid is accommodated in the glass tube for dissipating heat of the LED module assembly, and the heat dissipating liquid may be silicone oil.

The LED module assembly includes LED boards mounted with a plurality of LEDs in a plane and a heat pipe provided on each of the back surfaces thereof, the LED modules being supported by a front cap and a rear cap, and electrically connecting the LED modules mounted on the rear cap And an LED module substrate (PCB) may be provided on the back side of the rear cap to connect to a power source.

The heat sink includes a first heat sink supported in contact with the heat pipes by a support cap disposed at a predetermined distance from the rear cap, a second heat sink coupled to the first heat sink, And a second heat sink provided to the outside in a structure for accommodating the first heat pipe at the end thereof.

According to the present invention, there is provided an LED lamp having the above-described LED lamp on a reflector.

It is preferable that the reflector has an eccentricity of 0.85 to 0.93 and a longitudinal eccentricity of 0.18 to 0.35 on the lateral axis.

Preferably, the ceiling surface of the reflector is formed in a concavo-convex shape to cause diffuse reflection so that the shadow does not protrude directly below the illumination light.

The LED lamp according to the present invention has a heat pipe and a heat sink for discharging heat to the outside of the LED PCB on which the LEDs are mounted, so that the heat radiating effect is excellent and the lifetime of the LED is increased. It is possible to perform lamp replacement easily and quickly in a street lamp, a factory lamp, a security lamp, or the like.

The LED PCBs have the effect of easily obtaining appropriate light distribution characteristics according to the use of the lamp by joining the LED PCBs at both side ends of the horizontally arranged LED PCB in the range of 1 to 150 degrees according to the use of the lamp.

Further, an LED lamp having a light distribution characteristic required for a street lamp, a factory, and security is provided by changing the coupling angle of the LED PCB in the LED lamp.

1 is a schematic perspective view of an LED lamp according to the present invention;
Fig. 2 is a perspective view of the LED lamp of Fig. 1 with the heat sink cover removed. Fig.
3 is a cross-sectional perspective view showing the structure of Fig.
Figure 4 is a schematic perspective view of a luminaire with the LED lamp of Figure 1;
5 is a sectional view taken along the line AA in FIG.
FIGS. 6 to 8 are photographs of light distribution curves and lighting conditions for factory and street lamps, such as security, according to changes in the assembly angle of the substrates on which the LEDs of the present invention are mounted.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 to 3, the LED lamp of the present invention includes an LED module assembly 10, a glass tube 20 surrounding the LED module assembly and containing therein a heat dissipating liquid for radiating heat of the LED module, A heat sink 30 provided on the rear side of the module assembly, and a base portion 40 that can be easily installed on the reflector.

The LED module assembly 10 includes a plurality of LEDs 12, 12 ', 12' 'having a plurality of LEDs 11 mounted in a plane on the front cap 13 and a plurality of LEDs 12' A heat pipe 15 is coupled to the rear surface of each of the LED PCBs 12, 12 'and 12' ', and the LED modules mounted on the rear cap are electrically connected to each other And an LED module substrate (PCB) 18 is provided on the rear side of the rear cap 14 so as to be connected to a power source. The LED PCBs are preferably aluminum die-casting plates or extrudates so as to have good heat transfer characteristics for heat dissipation. Preferably, the front and rear caps are finished with a silicone finishing material to prevent leakage of the heat radiation book.

In the embodiment shown in the drawing, the LED PCBs 12 'and 12' 'are coupled in a trapezoidal shape at both ends of the horizontally disposed LED PCB 12, but may be polygonal or circular And can be assembled by varying the angle as required in the range of 1 to 150 degrees depending on the use of the lamp. That is, different light distribution characteristics are required depending on whether the lamp is for a factory, a security lamp or a street lamp, Considering the characteristics of the reflector, it is desirable to change the angle of the LED PCB 12'12 "according to the purpose of the lamp. This will be described later.

The LED module assembly 10 is disposed in a glass tube 20 having one end blocked and the other end hermetically coupled to the rear cap. The glass tube is filled with a heat dissipating liquid so that a part of the heat generated in the LED module is radiated , The heat dissipating liquid should also have an insulating property, and silicone oil may be used as an example of such heat dissipating liquid.

The heat sink 30 includes a first heat sink 31 supported in contact with the heat pipes 15 by a support cap 17 disposed at a predetermined distance from the rear cap 14, And a second heat sink (32) coupled to the first heat sink and provided externally in a structure that receives the first heat pipe at the outer end of the rear cap (14) and the support cap (17).

Heat generated in the plurality of LED modules mounted on the substrates is transmitted through the heat pipe 15 and dissipated through the heat sinks 31 and 32. In other words, a cooling liquid such as acetone, for example, provided in the heat pipe by the heat generated in the LED module is vaporized and flows to a place where the heat sink 31 composed of the condensation section exists and is cooled by the heat sink 31 The heat is condensed and liquefied and flows again to the place where the LED module is located, and the heat transferred from the heat pipe is dissipated by the heat sinks 31 and 32.

An insulating cover 41 is provided on the outside of the support cap 17 and a base portion 40 is detachably attached to the end of the insulating cover so as to be electrically connected to an external power source.

Accordingly, in the LED lamp according to the present invention, the heat generated from the plurality of LED modules and the substrate is dissipated through the heat pipes through the first and second heat sinks, and the heat is dissipated by the dissipating liquid in the glass tube, Lt; / RTI > In addition, since the base portion is provided at the end portion of the LED lamp, the LED lamp can be used easily and quickly in the case of a lamp failure, The difficulties are resolved.

In FIGS. 4 and 5, the LED lamp according to the present invention shown and described in FIGS. 1 to 3 can be used in the reflector 50 according to the present invention with improved light distribution characteristics.

According to the applicant of the present invention, in the reflector for an illumination lamp, when the longitudinal axis eccentricity increases with respect to the horizontal axis eccentricity in the side surface shape of the reflector, the illuminance decreases and the illuminance increases as the horizontal axis eccentricity increases with respect to the same longitudinal axis eccentricity. , The diffusivity decreases while the diffusivity decreases as the eccentricity increases. However, the eccentricity of the horizontal axis is 0.85 ~ 0.93 and the vertical axis eccentricity is 0.18 ~ 0.35. In addition, it is preferable that irregularities 51 are formed on the ceiling surface of the reflector so as to cause irregular reflection to prevent shadows from being directly below the illumination lamp.

The LED lamp of the present invention described above in FIG. 6 is suitable for a security light with a broad light distribution characteristic over a wide range from a light distribution curve that appears in a security reflector using the eccentricity described above. In FIG. 7, It can be seen that the area of the fingertip can be illuminated with a uniform illuminance in the form of a point light source in the light distribution curve when the LED lamp is installed on the reflector of the eccentricity, It can be confirmed that the light distribution characteristic suitable for the streetlight is shown as the result of the application to the reflector.

The LED lamp of the present invention has improved heat dissipation characteristics and prolongs its service life, and can easily and quickly perform maintenance on the reflector in a socket manner. Also, by adjusting the installation angle of the LED PCBs mounting the LED modules, And can be used for lamps of various fields such as light distribution for street lamps.

10: LED module assembly 11: LED
12, 12 ', 12 ": LED PCB 13: front cap
14: rear cap 15: heat pipe
17: support cap 18: substrate
20: Glass tube 30: Heat sink
31: first heat sink 32: second heat sink
40: Base portion

Claims (9)

A plurality of LEDs 12, 12 ', 12' ', which are mounted in a plane on a plurality of LEDs 11, are combined in a selected form of polygons and circles as a whole, and each of the LEDs 12, 12' And a heat pipe 15 is coupled to the rear surface of the heat pipe 15. The heat pipe 15 includes an LED module assembly 10 connected to a heat sink 30 to be discharged to the outside. The LED package according to claim 1, wherein the LED PCBs are formed by joining the LED PCBs 12 'and 12' 'at both ends of the horizontally disposed LED PCB 12 in the range of 1 ° to 150 °, . The LED lamp according to claim 1, wherein the LED module assembly (10) is disposed in a glass tube (20) and includes a base part (40) that can be easily installed in street lamps, security lamps, and the like. The LED lamp according to claim 3, wherein the glass tube (20) contains silicone oil as a non-conductive heat dissipating liquid for radiating heat of the LED module assembly (10). The LED module assembly according to any one of claims 1 to 4, wherein the LED module assembly (10) comprises a plurality of LEDs (11) mounted on the flat surface of the LED PCBs (12, 12 ' The provided heat pipe 15 is supported by the front cap 13 and the rear cap 14 and is electrically connected to the rear cap 14 to electrically connect the LED modules mounted on the rear cap to the rear side of the rear cap 14 Wherein an LED module substrate (18) is provided and configured. The heat sink according to claim 5, wherein the heat sink (30) is supported by the first heat sink (15) in contact with the heat pipes (15) by a support cap (17) And a second heat sink (32) coupled to the first heat sink and provided externally to receive the first heat pipe at an outer end of the rear cap (14) and the support cap (17) And a light emitting diode (LED). An LED lamp having an LED lamp according to any one of claims 1 to 6 on a reflector. The LED lamp according to claim 7, wherein the reflector has an eccentricity of a lateral axis of 0.85 to 0.93 and a longitudinal axis of an eccentricity of 0.18 to 0.35. [8] The LED lighting device of claim 7, wherein the ceiling surface of the reflector is formed in a concavo-convex shape to cause diffuse reflection so that the shadow is not supported directly under the light.

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