KR100947598B1 - Led lighting device using heat-sink body - Google Patents

Abstract

PURPOSE: An LED device is provided to prevent pressure rise inside a heat sink by including a negative pressure valve or pressure controller. CONSTITUTION: A heat sink(110) is made of aluminum. An upper groove and a lower groove are formed on the heat sink. The diameter of an upper groove is smaller than the diameter of a lower groove. A light emitting module(120) is received in the lower groove of the heat sink. A light emitting module is comprised of a plurality of LED(Light Emitting Diode)s. A packing ring(130) is combined along the inner circumference of the upper groove of the heat sink. A cover unit(140) is combined with the inner circumference of the packing ring. A power supply module supplies a DC current to the light emitting module.

Description

LED lighting equipment using heat dissipation body {LED LIGHTING DEVICE USING HEAT-SINK BODY}

The present invention relates to an LED lighting device, and more specifically, made of aluminum, by using a heat radiation body having a heat radiation fin at the bottom, by efficiently dissipating heat generated from the LED, improving the life characteristics of the LED lighting device It relates to an LED lighting fixture that can be made.

Common light bulbs used for lighting include fluorescent, incandescent, and metal neon lamps, most of which are gas discharge tube configurations in which gas is injected into a glass tube.

In the case of the general light bulbs described above, it may be the cause of air pollution when the gas leaks due to the burnout of the glass tube, and when the brightness is to be brightened, the power consumption increases accordingly, and power line construction must be performed accordingly, so There were problems such as excessive maintenance costs.

On the other hand, as an alternative to solve the problem of the above-mentioned bulbs, in recent years, the development of lighting fixtures using LEDs with low power consumption has been proposed. In the case of LED lighting fixtures, LEDs having high brightness and high lifespan are applied, with high lifetime. Intense light emission is possible.

In the case of LED luminaires, they do not actually have a high lifetime. This is because most LED lighting fixtures do not efficiently dissipate heat generated when driving LEDs. The heat that has not been released adversely affects the LED and the substrate, and also causes a sudden increase in the pressure inside the sealed luminaire, which can not overcome the pressure, resulting in damage to the cover or deterioration of the packing ability.

Therefore, there is a need for an LED lighting fixture having a new structure that can solve the heat dissipation problem, which is the biggest problem of the existing LED lighting fixture.

An object of the present invention is to provide an LED lighting device that is made of aluminum, and can increase the heat dissipation efficiency by using a heat dissipation body having a heat dissipation fin formed on the lower surface.

It is another object of the present invention to provide an LED lighting apparatus that can arrange a negative pressure valve or a pressure regulating means in the lighting apparatus to cope with a pressure increase in the lighting apparatus, thereby improving the life characteristics of the lighting apparatus.

LED lighting apparatus according to an embodiment of the present invention for achieving the above object is a heat dissipation body is formed with a lower groove and an upper groove having a larger diameter than the lower groove; A light emitting module accommodated in a lower groove of the heat dissipation body and having a plurality of light emitting diodes (LEDs) to emit light by using a supplied DC current; A packing ring tightly coupled along an inner circumferential surface of the upper groove of the heat dissipation body; A cover body coupled to an inner circumferential surface of the packing ring; And a power supply module for supplying a direct current to the light emitting module, wherein the heat dissipation body is made of aluminum and has a plurality of heat dissipation fins formed on a lower surface thereof, thereby reducing heat generated by driving of the light emitting module to a lower portion. It is characterized by emitting.

In this case, the light emitting module includes a metal PCB (Printed Circuit Board) having a plurality of protrusions formed on the edge of the screw groove; A plurality of LEDs mounted on an upper surface of the metal PCB; A plurality of diffusion lenses covering each of the plurality of LEDs and formed at the same height as the plurality of protrusions; And a cover board in which a plurality of holes are formed to expose upper surfaces of each of the plurality of diffusion lenses, and the cover board is screwed to the metal PCB through the protrusions.

In addition, the LED lighting apparatus according to the present invention may further include a negative pressure valve for maintaining the inside of the heat dissipating body at a negative pressure of less than atmospheric pressure when the plurality of LEDs are not driven.

In addition, the LED lighting device according to the present invention includes a pressure sensor for sensing the pressure inside the heat dissipation body; A pressure control unit for outputting a valve open signal using the pressure value output from the pressure sensor; And a valve configured to open in response to the valve open signal, thereby lowering a pressure inside the heat dissipating main body.

The LED lighting apparatus according to the present invention may increase heat dissipation efficiency by effectively dissipating heat generated by driving a plurality of LEDs of the light emitting module through a heat dissipation body made of aluminum and having a plurality of heat dissipation fins formed thereon.

In addition, the LED lighting device according to the present invention is arranged by the negative pressure valve (negative pressure) to maintain the pressure when the non-operation of the LED to a negative pressure of less than atmospheric pressure, to maintain the pressure within 2 atm even if the temperature rises 200 ~ 300 ℃ during LED driving In addition, by arranging the pressure adjusting means, and when the predetermined pressure or more to remove the air in the lighting fixture, it is possible to maintain the pressure inside the heat dissipating body at an appropriate level even during the operation of the lighting fixture.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, only the present embodiments to make the disclosure of the present invention complete, and common knowledge in the art to which the present invention pertains. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to LED lighting apparatus according to a preferred embodiment of the present invention.

1 is an exploded perspective view of an LED lighting device according to an embodiment of the present invention.

Referring to FIG. 1, the illustrated LED lighting device includes a heat dissipation body 110, a light emitting module 120, a packing ring 130, and a cover body 140.

The heat dissipation main body 110 has a cylindrical shape with an open top. In the present invention, the heat dissipation main body 110 has a lower groove and an upper groove having a larger diameter than the lower groove. The lower groove and the upper groove are partitioned by the step 111. Step 111 provides a position that the packing ring 130 to be described later is coupled to the heat dissipation body 110, and also serves to prevent the light emitting module 120 and the packing ring 130 is in direct contact.

In the present invention, the heat dissipation body 110 is made of an aluminum material which is light and has high thermal conductivity.

Figure 2 shows a cross-sectional view of the heat dissipation body that can be applied to the LED lighting fixture according to the present invention.

2, the heat dissipation body 110 is divided into a lower groove and an upper groove by the step 111. In addition, a plurality of heat dissipation fins 112 are formed on the lower surface of the heat dissipation body 110. The heat dissipation fin 112 widens the surface area and serves to increase heat dissipation efficiency.

Next, the light emitting module 120 is accommodated in the lower groove of the heat dissipation main body 110 and includes a plurality of light emitting diodes (LEDs). The light emitting module 120 emits light with a predetermined brightness and color using a DC current supplied from a power supply module (not shown).

The light emitting module 120 includes a metal PCB 121, a plurality of LEDs 123, a plurality of diffusion lenses 124, and a cover board 125.

The metal printed circuit board (121) has a circuit pattern formed thereon, and provides a position where a plurality of LEDs 123 are mounted on an upper surface thereof. In addition, the metal PCB 121 has a plurality of protrusions 122 formed at an edge thereof, and the plurality of protrusions 122 are formed for screwing the metal PCB 121 and the cover board 125. A screw groove is formed in the protrusion 122.

A plurality of LEDs (Light Emitting Diode) 123 is mounted on the upper surface of the metal PCB 121, and emits light with a predetermined brightness and color using a DC power supplied from a power supply module (not shown).

The plurality of diffusion lenses 124 respectively cover the plurality of LEDs 123. The diffusion lens 124 may have a shape such as a cone or a square pyramid, and guides the light generated by the LED driving upward. In addition, the plurality of diffusion lenses 124 emit uniform light to the outside through diffusion, and cover the plurality of LEDs 123 which are light sources.

The plurality of diffusion lenses 124 are formed at the same height as the plurality of protrusions 122 formed on the metal PCB 121. When the heights of the plurality of diffusion lenses 124 are higher than the heights of the plurality of protrusions 122, the plurality of diffusion lenses 124 may not be fixed when the cover board 125 is coupled. On the contrary, when the heights of the plurality of diffusion lenses 124 are lower than the heights of the plurality of protrusions 122, the plurality of diffusion lenses 124 may not be properly fixed when the cover board 125 is coupled to the plurality of diffusion lenses ( 124 may deviate.

When the cover board 125 is coupled, a plurality of holes are formed to expose the top surface of each of the plurality of diffusion lenses 124. In addition, a coupling hole is formed at an edge of the cover part, and screwed to the metal PCB 121 through the protrusion 121.

Next, the packing ring 130 is tightly coupled along the inner circumferential surface of the upper groove of the heat dissipation body 110 to seal the inside of the lighting fixture.

The cover body 140 is coupled to the inner circumferential surface of the packing ring 130. The cover body 140 may be formed of a material such as transparent glass or color glass.

In addition, referring to FIG. 1, the LED lighting apparatus according to the present invention may further include exterior structures 151 and 152. The exterior structure forms an exterior of a lighting fixture, and in FIG. 1, the exterior structure includes a case 151 accommodating a heat dissipation body 110 and an exterior cover 152 coupled to an upper surface of the case 151. . The exterior structures 151 and 152 may be formed of an aluminum material that is light and has excellent thermal conductivity similarly to the heat dissipation body 110. The exterior structures 151 and 152 may also be formed of stainless steel.

Although not shown in the drawings, the LED lighting device according to the present invention includes a power supply module connected to an external power source and converting an AC current into a DC current to supply the light emitting module. The power supply module may be disposed at a lower side of the heat dissipation main body 110, or may be disposed separately from the heat dissipation main body 110, and may also be disposed in the case 151 of the exterior structure. The power supply module may include various components or circuits for supplying power to the light emitting module 120 such as a rectifier and a ballast.

3 is a perspective view showing a combined perspective view of the LED lighting fixture shown in FIG. 1, the heat dissipation main body 110, the light emitting module 120, the packing ring 130, the cover body 140 and the exterior structure shown in FIG. (151,152) shows the combined result in order. The LED lighting apparatus according to the present invention including the heat dissipation body 110, the light emitting module 120, and the like may be modified in various forms.

Figure 4 shows an exploded perspective view of the LED lighting fixture according to another embodiment of the present invention, Figure 5 shows a combined perspective view of the LED lighting fixture shown in FIG.

Referring to FIG. 4, the illustrated LED lighting fixture includes a heat dissipation body 110, a light emitting module 120, a packing ring 130, and a transparent cover 140, as shown in FIG. 1.

However, in FIG. 4, the exterior structure 411 has a form that is screwed to the front surface of the heat dissipation main body 110, can be fixed to a wall or a frame, and has a form that can easily adjust the angle of illuminated light. In, there is a difference from the LED lighting fixture shown in FIG. In addition, while the heat dissipation main body is accommodated in the case 151 in FIG. 1, since the rear surface of the heat dissipation main body is exposed in FIG. 4, the heat dissipation effect is greater.

Since the heat dissipation body 110, the light emitting module 120, the packing ring 130, and the transparent cover 140 are the same as described above with reference to FIG. 1, detailed description thereof will be omitted.

On the other hand, the LED lighting device according to the present invention may further arrange a negative pressure valve (not shown) in the form of penetrating the lower surface or the side surface of the heat dissipation body 110, and the like.

The negative pressure valve serves to maintain the inside of the heat dissipation body 110 at a negative pressure below atmospheric pressure when the plurality of LEDs 123 of the light emitting module 120 are not driven. When the negative pressure valve is disposed, the pressure inside the heat dissipation main body 110 is maintained lower than atmospheric pressure when the illumination is not made. When the illumination is performed, heat is generated by the plurality of LEDs 123 of the light emitting module 120, and thus the temperature inside the heat dissipation main body 110 is rapidly increased. At this time, the internal pressure of the heat dissipation body 110 is also increased by the internal temperature rise of the heat dissipation body 110. In this case, the cover body 140 is damaged or the packing ring 130 is damaged depending on the environment in which the lighting apparatus is disposed. The packing force may be lowered.

In order to prevent this, in the present invention, a negative pressure valve is disposed, and in this case, the internal pressure of the heat dissipating main body 110 may be maintained at about 0.7 to 0.8 atm when the lighting is not performed through the LED 123. Therefore, in this case, even if the pressure doubles due to the temperature rise, since the pressure inside the heat dissipation main body 110 is only about 1.4 to 1.6 atm, the pressure inside the heat dissipation main body 110 is relatively higher than when the negative pressure valve is not disposed. Can be kept low.

In addition, the LED lighting fixture according to the present invention may be provided with a pressure adjusting means 600 as shown in FIG.

Referring to FIG. 6, the pressure regulating means may include a pressure sensor 610, a pressure controller 620, and a valve 630.

The pressure sensor 610, the pressure control unit 620, and the valve 630 constituting the pressure adjusting unit 600 may be separately configured, or may be integrally formed. In addition, the pressure sensor 610, the pressure controller 620, and the valve 630 may be separately connected to an external power source, and may be electrically connected to a power supply module for supplying power to the light emitting module 120.

The pressure sensor 210 is mounted on the inner surface of the heat dissipation body 110. The pressure sensor 610 detects the pressure inside the sealed heat dissipation main body 110 and outputs a pressure value C _in corresponding to the sensed pressure to the pressure controller 620.

The pressure controller 620 uses the pressure value C _in output from the pressure sensor 610 to open the valve 630 when the pressure corresponding to the pressure value is greater than or equal to the set pressure. Print V _open ). The pressure controller 620 may be disposed on the bottom surface or the side of the heat dissipation body 110, and may be disposed separately from the heat dissipation body 110.

The valve 630 may be disposed to penetrate the lower surface or the side surface of the heat dissipation body so as to be exhausted to the outside of the heat dissipation body 110.

The valve 630 is opened in response to the valve open signal V _open output from the pressure controller 620. As the valve 630 is opened, the exhaust is exhausted to lower the pressure inside the heat dissipation body 110. Thus, a predetermined level of pressure may be maintained in the heat dissipation main body 110 even when illumination by the light emitting module 120 continues.

FIG. 7 is a block diagram schematically illustrating an example of the pressure controller illustrated in FIG. 6.

Referring to FIG. 6, the pressure controller 620 according to the illustrated example includes an input unit 710, a comparison unit 720, and an output unit 730.

The input unit 710 receives a pressure value C _in from the pressure sensor 610.

The comparator 720 compares the pressure value C _in output from the input unit 710 with the set value C _th , and outputs a result signal. For example, when the pressure value C _in is smaller than the set value C _th (C _in <C _th ), '0' corresponding to a signal for not opening the valve 630 is output, and the pressure value ( When C _in ) is equal to or greater than the set value C _th (C _in ≥ C _th ), a '1' corresponding to a signal for opening the valve 630 is output.

The output unit 730 determines the result signal output from the comparator 720, and when the result signal corresponds to a signal for opening the valve 630 ('1' in the above example), the valve open signal (V) _open ) is output to the valve 630.

At this time, the output unit 730 is connected to the timer 740, and outputs a valve open signal (V _open ) for a predetermined time, it may output a signal for automatically closing the valve 630 after a predetermined time. In this case, the valve 630 is opened only when the set value is higher than the set value specified by the internal pressure rise of the case 110, and automatically closes again after a predetermined time, that is, when the valve is opened, the valve is artificially opened again. The advantage is that no closing process is required.

Although the above has been described with reference to one embodiment of the present invention, various changes and modifications can be made at the level of those skilled in the art. Such changes and modifications may belong to the present invention without departing from the scope of the present invention. Therefore, the scope of the present invention will be determined by the claims described below.

1 is an exploded perspective view of an LED lighting device according to an embodiment of the present invention.

Figure 2 shows a cross-sectional view of the heat dissipation body that can be applied to the LED lighting fixture according to the present invention.

3 is a perspective view showing a coupling of the LED lighting fixture shown in FIG.

Figure 4 shows an exploded perspective view of the LED lighting fixture according to another embodiment of the present invention.

FIG. 5 is a perspective view showing a combined perspective view of the LED lighting fixture shown in FIG. 4.

6 is a block diagram schematically showing the pressure regulating means.

FIG. 7 is a block diagram schematically illustrating an example of the pressure controller illustrated in FIG. 6.

Claims (7)

A heat dissipation body having a lower groove and an upper groove having a diameter larger than that of the lower groove; A light emitting module accommodated in a lower groove of the heat dissipation body and having a plurality of light emitting diodes (LEDs) to emit light by using a supplied DC current; A packing ring tightly coupled along an inner circumferential surface of the upper groove of the heat dissipation body; A cover body coupled to an inner circumferential surface of the packing ring; And And a power supply module supplying a direct current to the light emitting module. The light emitting module may include a metal printed circuit board (PCB) having a plurality of protrusions formed at edges thereof with screw grooves; A plurality of LEDs mounted on an upper surface of the metal PCB; A plurality of diffusion lenses covering each of the plurality of LEDs and formed at the same height as the plurality of protrusions; And a cover board having a plurality of holes formed to expose upper surfaces of each of the plurality of diffusion lenses, the cover board being screwed to the metal PCB through the protrusions. The heat dissipation main body is made of aluminum and a plurality of heat dissipation fins are formed on the lower surface, LED lighting fixture, characterized in that to discharge the heat generated by the drive of the light emitting module to the bottom. The method of claim 1, The lighting fixture further includes an exterior structure accommodating the heat dissipation body or coupled to an upper surface of the heat dissipation body. delete The method of claim 1, The luminaire further comprises a negative pressure valve for maintaining the inside of the heat dissipating body at a negative pressure below atmospheric pressure when the plurality of LEDs are not driven. The method of claim 1, The lighting device is a pressure sensor for sensing the pressure inside the heat dissipation body, a pressure control unit for outputting a valve open signal using the pressure value output from the pressure sensor, and the opening is made in response to the valve open signal LED lighting fixture further comprises a pressure adjusting means including a valve for lowering the pressure inside the heat dissipation body. The method of claim 5, The pressure control unit may include an input unit for receiving a pressure value from the pressure sensor, a comparison unit comparing the pressure value with a set value and outputting a result signal, and the valve opening when the result signal corresponds to a predetermined pressure or more. LED lighting device comprising an output unit for outputting a signal to the valve. The method of claim 6, The output unit is connected to a timer, LED lighting device, characterized in that for outputting the valve open signal for a predetermined time.

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